/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtOpenVG module of the Qt Toolkit.
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** contained in the Technology Preview License Agreement accompanying
** this package.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
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****************************************************************************/
#include "qpaintengine_vg_p.h"
#include "qpixmapdata_vg_p.h"
#include "qpixmapfilter_vg_p.h"
#include "qvgcompositionhelper_p.h"
#include "qvgimagepool_p.h"
#if !defined(QT_NO_EGL)
#include <QtGui/private/qegl_p.h>
#include "qwindowsurface_vgegl_p.h"
#endif
#include <QtCore/qvarlengtharray.h>
#include <QtGui/private/qdrawhelper_p.h>
#include <QtGui/private/qtextureglyphcache_p.h>
#include <QtGui/private/qtextengine_p.h>
#include <QtGui/private/qfontengine_p.h>
#include <QtGui/private/qpainterpath_p.h>
#include <QDebug>
#include <QSet>
QT_BEGIN_NAMESPACE
// vgDrawGlyphs() only exists in OpenVG 1.1 and higher.
#if !defined(OPENVG_VERSION_1_1) && !defined(QVG_NO_DRAW_GLYPHS)
#define QVG_NO_DRAW_GLYPHS 1
#endif
// vgRenderToMask() only exists in OpenVG 1.1 and higher.
// Also, disable masking completely if we are using the scissor to clip.
#if !defined(OPENVG_VERSION_1_1) && !defined(QVG_NO_RENDER_TO_MASK)
#define QVG_NO_RENDER_TO_MASK 1
#endif
#if defined(QVG_SCISSOR_CLIP) && !defined(QVG_NO_RENDER_TO_MASK)
#define QVG_NO_RENDER_TO_MASK 1
#endif
#if !defined(QVG_NO_DRAW_GLYPHS)
Q_DECL_IMPORT extern int qt_defaultDpiX();
Q_DECL_IMPORT extern int qt_defaultDpiY();
class QVGPaintEnginePrivate;
class QVGFontGlyphCache
{
public:
QVGFontGlyphCache();
~QVGFontGlyphCache();
void cacheGlyphs(QVGPaintEnginePrivate *d,
const QTextItemInt &ti,
const QVarLengthArray<glyph_t> &glyphs);
void setScaleFromText(const QTextItemInt &ti);
VGFont font;
VGfloat scaleX;
VGfloat scaleY;
uint cachedGlyphsMask[256 / 32];
QSet<glyph_t> cachedGlyphs;
};
typedef QHash<QFontEngine*, QVGFontGlyphCache*> QVGFontCache;
#endif
class QVGFontEngineCleaner : public QObject
{
Q_OBJECT
public:
QVGFontEngineCleaner(QVGPaintEnginePrivate *d);
~QVGFontEngineCleaner();
public slots:
void fontEngineDestroyed();
private:
QVGPaintEnginePrivate *d_ptr;
};
class QVGPaintEnginePrivate : public QPaintEngineExPrivate
{
public:
QVGPaintEnginePrivate();
~QVGPaintEnginePrivate();
void init();
void initObjects();
void destroy();
void setTransform(VGMatrixMode mode, const QTransform& transform);
void updateTransform(QPaintDevice *pdev);
void draw(VGPath path, const QPen& pen, const QBrush& brush, VGint rule = VG_EVEN_ODD);
void stroke(VGPath path, const QPen& pen);
void fill(VGPath path, const QBrush& brush, VGint rule = VG_EVEN_ODD);
VGPath vectorPathToVGPath(const QVectorPath& path);
VGPath painterPathToVGPath(const QPainterPath& path);
VGPath roundedRectPath(const QRectF &rect, qreal xRadius, qreal yRadius, Qt::SizeMode mode);
VGPaintType setBrush
(VGPaint paint, const QBrush& brush, VGMatrixMode mode,
VGPaintType prevPaintType);
void setPenParams(const QPen& pen);
void setBrushTransform(const QBrush& brush, VGMatrixMode mode);
void setupColorRamp(const QGradient *grad, VGPaint paint);
void setImageOptions();
#if !defined(QVG_SCISSOR_CLIP)
void ensureMask(QVGPaintEngine *engine, int width, int height);
void modifyMask
(QVGPaintEngine *engine, VGMaskOperation op, const QRegion& region);
void modifyMask
(QVGPaintEngine *engine, VGMaskOperation op, const QRect& rect);
#endif
VGint maxScissorRects; // Maximum scissor rectangles for clipping.
VGPaint penPaint; // Paint for currently active pen.
VGPaint brushPaint; // Paint for currently active brush.
VGPaint opacityPaint; // Paint for drawing images with opacity.
VGPaint fillPaint; // Current fill paint that is active.
QPen currentPen; // Current pen set in "penPaint".
QBrush currentBrush; // Current brush set in "brushPaint".
bool forcePenChange; // Force a pen change, even if the same.
bool forceBrushChange; // Force a brush change, even if the same.
VGPaintType penType; // Type of the last pen that was set.
VGPaintType brushType; // Type of the last brush that was set.
QPointF brushOrigin; // Current brush origin.
VGint fillRule; // Last fill rule that was set.
qreal opacity; // Current drawing opacity.
qreal paintOpacity; // Opacity in opacityPaint.
#if !defined(QVG_NO_MODIFY_PATH)
VGPath rectPath; // Cached path for quick drawing of rectangles.
VGPath linePath; // Cached path for quick drawing of lines.
VGPath roundRectPath; // Cached path for quick drawing of rounded rects.
#endif
QTransform transform; // Currently active transform.
bool simpleTransform; // True if the transform is simple (non-projective).
qreal penScale; // Pen scaling factor from "transform".
QTransform pathTransform; // Calculated VG path transformation.
QTransform glyphTransform; // Calculated VG glyph transformation.
QTransform imageTransform; // Calculated VG image transformation.
bool pathTransformSet; // True if path transform set in the VG context.
bool maskValid; // True if vgMask() contains valid data.
bool maskIsSet; // True if mask would be fully set if it was valid.
bool scissorMask; // True if scissor is used in place of the mask.
bool rawVG; // True if processing a raw VG escape.
QRect maskRect; // Rectangle version of mask if it is simple.
QTransform penTransform; // Transform for the pen.
QTransform brushTransform; // Transform for the brush.
VGMatrixMode matrixMode; // Last matrix mode that was set.
VGImageMode imageMode; // Last image mode that was set.
QRegion scissorRegion; // Currently active scissor region.
bool scissorActive; // True if scissor region is active.
bool scissorDirty; // True if scissor is dirty after native painting.
QPaintEngine::DirtyFlags dirty;
QColor clearColor; // Last clear color that was set.
VGfloat clearOpacity; // Opacity during the last clear.
VGBlendMode blendMode; // Active blend mode.
VGRenderingQuality renderingQuality; // Active rendering quality.
VGImageQuality imageQuality; // Active image quality.
#if !defined(QVG_NO_DRAW_GLYPHS)
QVGFontCache fontCache;
QVGFontEngineCleaner *fontEngineCleaner;
#endif
QScopedPointer<QPixmapFilter> convolutionFilter;
QScopedPointer<QPixmapFilter> colorizeFilter;
QScopedPointer<QPixmapFilter> dropShadowFilter;
QScopedPointer<QPixmapFilter> blurFilter;
// Ensure that the path transform is properly set in the VG context
// before we perform a vgDrawPath() operation.
inline void ensurePathTransform()
{
if (!pathTransformSet) {
setTransform(VG_MATRIX_PATH_USER_TO_SURFACE, pathTransform);
pathTransformSet = true;
}
}
// Ensure that a specific pen has been set into penPaint.
inline void ensurePen(const QPen& pen) {
if (forcePenChange || pen != currentPen) {
currentPen = pen;
forcePenChange = false;
penType = setBrush
(penPaint, pen.brush(),
VG_MATRIX_STROKE_PAINT_TO_USER, penType);
setPenParams(pen);
}
}
// Ensure that a specific brush has been set into brushPaint.
inline void ensureBrush(const QBrush& brush) {
if (forceBrushChange || brush != currentBrush) {
currentBrush = brush;
forceBrushChange = false;
brushType = setBrush
(brushPaint, brush, VG_MATRIX_FILL_PAINT_TO_USER, brushType);
}
if (fillPaint != brushPaint) {
vgSetPaint(brushPaint, VG_FILL_PATH);
fillPaint = brushPaint;
}
}
// Set various modes, but only if different.
inline void setImageMode(VGImageMode mode);
inline void setRenderingQuality(VGRenderingQuality mode);
inline void setImageQuality(VGImageQuality mode);
inline void setBlendMode(VGBlendMode mode);
inline void setFillRule(VGint mode);
// Clear all lazily-set modes.
void clearModes();
};
inline void QVGPaintEnginePrivate::setImageMode(VGImageMode mode)
{
if (imageMode != mode) {
imageMode = mode;
vgSeti(VG_IMAGE_MODE, mode);
}
}
inline void QVGPaintEnginePrivate::setRenderingQuality(VGRenderingQuality mode)
{
if (renderingQuality != mode) {
vgSeti(VG_RENDERING_QUALITY, mode);
renderingQuality = mode;
}
}
inline void QVGPaintEnginePrivate::setImageQuality(VGImageQuality mode)
{
if (imageQuality != mode) {
vgSeti(VG_IMAGE_QUALITY, mode);
imageQuality = mode;
}
}
inline void QVGPaintEnginePrivate::setBlendMode(VGBlendMode mode)
{
if (blendMode != mode) {
vgSeti(VG_BLEND_MODE, mode);
blendMode = mode;
}
}
inline void QVGPaintEnginePrivate::setFillRule(VGint mode)
{
if (fillRule != mode) {
fillRule = mode;
vgSeti(VG_FILL_RULE, mode);
}
}
void QVGPaintEnginePrivate::clearModes()
{
matrixMode = (VGMatrixMode)0;
imageMode = (VGImageMode)0;
blendMode = (VGBlendMode)0;
renderingQuality = (VGRenderingQuality)0;
imageQuality = (VGImageQuality)0;
}
QVGPaintEnginePrivate::QVGPaintEnginePrivate()
{
init();
}
void QVGPaintEnginePrivate::init()
{
maxScissorRects = 0;
penPaint = 0;
brushPaint = 0;
opacityPaint = 0;
fillPaint = 0;
forcePenChange = true;
forceBrushChange = true;
penType = (VGPaintType)0;
brushType = (VGPaintType)0;
brushOrigin = QPointF(0.0f, 0.0f);
fillRule = 0;
opacity = 1.0;
paintOpacity = 1.0f;
#if !defined(QVG_NO_MODIFY_PATH)
rectPath = 0;
linePath = 0;
roundRectPath = 0;
#endif
simpleTransform = true;
pathTransformSet = false;
penScale = 1.0;
maskValid = false;
maskIsSet = false;
scissorMask = false;
rawVG = false;
scissorActive = false;
scissorDirty = false;
dirty = 0;
clearOpacity = 1.0f;
#if !defined(QVG_NO_DRAW_GLYPHS)
fontEngineCleaner = 0;
#endif
clearModes();
}
QVGPaintEnginePrivate::~QVGPaintEnginePrivate()
{
destroy();
}
void QVGPaintEnginePrivate::initObjects()
{
maxScissorRects = vgGeti(VG_MAX_SCISSOR_RECTS);
penPaint = vgCreatePaint();
vgSetParameteri(penPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetPaint(penPaint, VG_STROKE_PATH);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
vgLoadIdentity();
brushPaint = vgCreatePaint();
vgSetParameteri(brushPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetPaint(brushPaint, VG_FILL_PATH);
fillPaint = brushPaint;
vgSeti(VG_MATRIX_MODE, VG_MATRIX_FILL_PAINT_TO_USER);
vgLoadIdentity();
matrixMode = VG_MATRIX_FILL_PAINT_TO_USER;
opacityPaint = vgCreatePaint();
vgSetParameteri(opacityPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
VGfloat values[4];
values[0] = 1.0f;
values[1] = 1.0f;
values[2] = 1.0f;
values[3] = paintOpacity;
vgSetParameterfv(opacityPaint, VG_PAINT_COLOR, 4, values);
#if !defined(QVG_NO_MODIFY_PATH)
// Create a dummy path for rectangle drawing, which we can
// modify later with vgModifyPathCoords(). This should be
// faster than constantly creating and destroying paths.
rectPath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
5, // segmentCapacityHint
8, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
static VGubyte const segments[5] = {
VG_MOVE_TO_ABS,
VG_LINE_TO_ABS,
VG_LINE_TO_ABS,
VG_LINE_TO_ABS,
VG_CLOSE_PATH
};
VGfloat coords[8];
coords[0] = 0.0f;
coords[1] = 0.0f;
coords[2] = 100.0f;
coords[3] = coords[1];
coords[4] = coords[2];
coords[5] = 100.0f;
coords[6] = coords[0];
coords[7] = coords[5];
vgAppendPathData(rectPath, 5, segments, coords);
// Create a dummy line drawing path as well.
linePath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
2, // segmentCapacityHint
4, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
vgAppendPathData(linePath, 2, segments, coords);
#endif
}
void QVGPaintEnginePrivate::destroy()
{
if (penPaint)
vgDestroyPaint(penPaint);
if (brushPaint)
vgDestroyPaint(brushPaint);
if (opacityPaint)
vgDestroyPaint(opacityPaint);
#if !defined(QVG_NO_MODIFY_PATH)
if (rectPath)
vgDestroyPath(rectPath);
if (linePath)
vgDestroyPath(linePath);
if (roundRectPath)
vgDestroyPath(roundRectPath);
#endif
#if !defined(QVG_NO_DRAW_GLYPHS)
QVGFontCache::Iterator it;
for (it = fontCache.begin(); it != fontCache.end(); ++it)
delete it.value();
fontCache.clear();
delete fontEngineCleaner;
#endif
}
// Set a specific VG transformation matrix in the current VG context.
void QVGPaintEnginePrivate::setTransform
(VGMatrixMode mode, const QTransform& transform)
{
VGfloat mat[9];
if (mode != matrixMode) {
vgSeti(VG_MATRIX_MODE, mode);
matrixMode = mode;
}
mat[0] = transform.m11();
mat[1] = transform.m12();
mat[2] = transform.m13();
mat[3] = transform.m21();
mat[4] = transform.m22();
mat[5] = transform.m23();
mat[6] = transform.m31();
mat[7] = transform.m32();
mat[8] = transform.m33();
vgLoadMatrix(mat);
}
Q_DECL_IMPORT extern bool qt_scaleForTransform(const QTransform &transform, qreal *scale);
void QVGPaintEnginePrivate::updateTransform(QPaintDevice *pdev)
{
VGfloat devh = pdev->height();
// Construct the VG transform by combining the Qt transform with
// the following viewport transformation:
// | 1 0 0 |
// | 0 -1 devh |
// | 0 0 1 |
// The glyph transform uses a slightly different transformation:
// | 1 0 0 | | 1 0 0.5 | | 1 0 0.5 |
// | 0 -1 devh - 1 | * | 0 1 -0.5 | = | 0 -1 (devh - 0.5) |
// | 0 0 1 | | 0 0 1 | | 0 0 1 |
// The full VG transform is effectively:
// 1. Apply the user's transformation matrix.
// 2. Translate glyphs by an extra (0.5, -0.5).
// 3. Flip the co-ordinate system upside down.
QTransform viewport(1.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, devh, 1.0f);
QTransform gviewport(1.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.5f, devh - 0.5f, 1.0f);
// Compute the path transform and determine if it is projective.
pathTransform = transform * viewport;
glyphTransform = transform * gviewport;
bool projective = (pathTransform.m13() != 0.0f ||
pathTransform.m23() != 0.0f ||
pathTransform.m33() != 1.0f);
if (projective) {
// The engine cannot do projective path transforms for us,
// so we will have to convert the co-ordinates ourselves.
// Change the matrix to just the viewport transformation.
pathTransform = viewport;
glyphTransform = gviewport;
simpleTransform = false;
} else {
simpleTransform = true;
}
pathTransformSet = false;
// The image transform is always the full transformation,
imageTransform = transform * viewport;
// Calculate the scaling factor to use for turning cosmetic pens
// into ordinary non-cosmetic pens.
qt_scaleForTransform(transform, &penScale);
}
VGPath QVGPaintEnginePrivate::vectorPathToVGPath(const QVectorPath& path)
{
int count = path.elementCount();
const qreal *points = path.points();
const QPainterPath::ElementType *elements = path.elements();
VGPath vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
count + 1, // segmentCapacityHint
count * 2, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
// Size is sufficient segments for drawRoundedRect() paths.
QVarLengthArray<VGubyte, 20> segments;
if (sizeof(qreal) == sizeof(VGfloat) && elements && simpleTransform) {
// If Qt was compiled with qreal the same size as VGfloat,
// then convert the segment types and use the incoming
// points array directly.
for (int i = 0; i < count; ++i) {
switch (elements[i]) {
case QPainterPath::MoveToElement:
segments.append(VG_MOVE_TO_ABS); break;
case QPainterPath::LineToElement:
segments.append(VG_LINE_TO_ABS); break;
case QPainterPath::CurveToElement:
segments.append(VG_CUBIC_TO_ABS); break;
case QPainterPath::CurveToDataElement: break;
}
}
if (path.hasImplicitClose())
segments.append(VG_CLOSE_PATH);
vgAppendPathData(vgpath, segments.count(), segments.constData(),
reinterpret_cast<const VGfloat *>(points));
return vgpath;
}
// Sizes chosen so that drawRoundedRect() paths fit in these arrays.
QVarLengthArray<VGfloat, 48> coords;
int curvePos = 0;
QPointF temp;
if (elements && simpleTransform) {
// Convert the members of the element array.
for (int i = 0; i < count; ++i) {
switch (elements[i]) {
case QPainterPath::MoveToElement:
{
coords.append(points[0]);
coords.append(points[1]);
segments.append(VG_MOVE_TO_ABS);
}
break;
case QPainterPath::LineToElement:
{
coords.append(points[0]);
coords.append(points[1]);
segments.append(VG_LINE_TO_ABS);
}
break;
case QPainterPath::CurveToElement:
{
coords.append(points[0]);
coords.append(points[1]);
curvePos = 2;
}
break;
case QPainterPath::CurveToDataElement:
{
coords.append(points[0]);
coords.append(points[1]);
curvePos += 2;
if (curvePos == 6) {
curvePos = 0;
segments.append(VG_CUBIC_TO_ABS);
}
}
break;
}
points += 2;
}
} else if (elements && !simpleTransform) {
// Convert the members of the element array after applying the
// current transform to the path locally.
for (int i = 0; i < count; ++i) {
switch (elements[i]) {
case QPainterPath::MoveToElement:
{
temp = transform.map(QPointF(points[0], points[1]));
coords.append(temp.x());
coords.append(temp.y());
segments.append(VG_MOVE_TO_ABS);
}
break;
case QPainterPath::LineToElement:
{
temp = transform.map(QPointF(points[0], points[1]));
coords.append(temp.x());
coords.append(temp.y());
segments.append(VG_LINE_TO_ABS);
}
break;
case QPainterPath::CurveToElement:
{
temp = transform.map(QPointF(points[0], points[1]));
coords.append(temp.x());
coords.append(temp.y());
curvePos = 2;
}
break;
case QPainterPath::CurveToDataElement:
{
temp = transform.map(QPointF(points[0], points[1]));
coords.append(temp.x());
coords.append(temp.y());
curvePos += 2;
if (curvePos == 6) {
curvePos = 0;
segments.append(VG_CUBIC_TO_ABS);
}
}
break;
}
points += 2;
}
} else if (count > 0 && simpleTransform) {
// If there is no element array, then the path is assumed
// to be a MoveTo followed by several LineTo's.
coords.append(points[0]);
coords.append(points[1]);
segments.append(VG_MOVE_TO_ABS);
while (count > 1) {
points += 2;
coords.append(points[0]);
coords.append(points[1]);
segments.append(VG_LINE_TO_ABS);
--count;
}
} else if (count > 0 && !simpleTransform) {
// Convert a simple path, and apply the transform locally.
temp = transform.map(QPointF(points[0], points[1]));
coords.append(temp.x());
coords.append(temp.y());
segments.append(VG_MOVE_TO_ABS);
while (count > 1) {
points += 2;
temp = transform.map(QPointF(points[0], points[1]));
coords.append(temp.x());
coords.append(temp.y());
segments.append(VG_LINE_TO_ABS);
--count;
}
}
// Close the path if specified.
if (path.hasImplicitClose())
segments.append(VG_CLOSE_PATH);
vgAppendPathData(vgpath, segments.count(),
segments.constData(), coords.constData());
return vgpath;
}
VGPath QVGPaintEnginePrivate::painterPathToVGPath(const QPainterPath& path)
{
int count = path.elementCount();
VGPath vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
count + 1, // segmentCapacityHint
count * 2, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
if (count == 0)
return vgpath;
const QPainterPath::Element *elements = &(path.elementAt(0));
// Sizes chosen so that drawRoundedRect() paths fit in these arrays.
QVarLengthArray<VGfloat, 48> coords;
QVarLengthArray<VGubyte, 20> segments;
int curvePos = 0;
QPointF temp;
// Keep track of the start and end of each sub-path. QPainterPath
// does not have an "implicit close" flag like QVectorPath does.
// We therefore have to detect closed paths by looking for a LineTo
// element that connects back to the initial MoveTo element.
qreal startx = 0.0;
qreal starty = 0.0;
qreal endx = 0.0;
qreal endy = 0.0;
bool haveStart = false;
bool haveEnd = false;
if (simpleTransform) {
// Convert the members of the element array.
for (int i = 0; i < count; ++i) {
switch (elements[i].type) {
case QPainterPath::MoveToElement:
{
if (haveStart && haveEnd && startx == endx && starty == endy) {
// Implicitly close the previous sub-path.
segments.append(VG_CLOSE_PATH);
}
startx = elements[i].x;
starty = elements[i].y;
coords.append(startx);
coords.append(starty);
haveStart = true;
haveEnd = false;
segments.append(VG_MOVE_TO_ABS);
}
break;
case QPainterPath::LineToElement:
{
endx = elements[i].x;
endy = elements[i].y;
coords.append(endx);
coords.append(endy);
haveEnd = true;
segments.append(VG_LINE_TO_ABS);
}
break;
case QPainterPath::CurveToElement:
{
coords.append(elements[i].x);
coords.append(elements[i].y);
haveEnd = false;
curvePos = 2;
}
break;
case QPainterPath::CurveToDataElement:
{
coords.append(elements[i].x);
coords.append(elements[i].y);
haveEnd = false;
curvePos += 2;
if (curvePos == 6) {
curvePos = 0;
segments.append(VG_CUBIC_TO_ABS);
}
}
break;
}
}
} else {
// Convert the members of the element array after applying the
// current transform to the path locally.
for (int i = 0; i < count; ++i) {
switch (elements[i].type) {
case QPainterPath::MoveToElement:
{
if (haveStart && haveEnd && startx == endx && starty == endy) {
// Implicitly close the previous sub-path.
segments.append(VG_CLOSE_PATH);
}
temp = transform.map(QPointF(elements[i].x, elements[i].y));
startx = temp.x();
starty = temp.y();
coords.append(startx);
coords.append(starty);
haveStart = true;
haveEnd = false;
segments.append(VG_MOVE_TO_ABS);
}
break;
case QPainterPath::LineToElement:
{
temp = transform.map(QPointF(elements[i].x, elements[i].y));
endx = temp.x();
endy = temp.y();
coords.append(endx);
coords.append(endy);
haveEnd = true;
segments.append(VG_LINE_TO_ABS);
}
break;
case QPainterPath::CurveToElement:
{
temp = transform.map(QPointF(elements[i].x, elements[i].y));
coords.append(temp.x());
coords.append(temp.y());
haveEnd = false;
curvePos = 2;
}
break;
case QPainterPath::CurveToDataElement:
{
temp = transform.map(QPointF(elements[i].x, elements[i].y));
coords.append(temp.x());
coords.append(temp.y());
haveEnd = false;
curvePos += 2;
if (curvePos == 6) {
curvePos = 0;
segments.append(VG_CUBIC_TO_ABS);
}
}
break;
}
}
}
if (haveStart && haveEnd && startx == endx && starty == endy) {
// Implicitly close the last sub-path.
segments.append(VG_CLOSE_PATH);
}
vgAppendPathData(vgpath, segments.count(),
segments.constData(), coords.constData());
return vgpath;
}
VGPath QVGPaintEnginePrivate::roundedRectPath(const QRectF &rect, qreal xRadius, qreal yRadius, Qt::SizeMode mode)
{
static VGubyte roundedrect_types[] = {
VG_MOVE_TO_ABS,
VG_LINE_TO_ABS,
VG_CUBIC_TO_ABS,
VG_LINE_TO_ABS,
VG_CUBIC_TO_ABS,
VG_LINE_TO_ABS,
VG_CUBIC_TO_ABS,
VG_LINE_TO_ABS,
VG_CUBIC_TO_ABS,
VG_CLOSE_PATH
};
qreal x1 = rect.left();
qreal x2 = rect.right();
qreal y1 = rect.top();
qreal y2 = rect.bottom();
if (mode == Qt::RelativeSize) {
xRadius = xRadius * rect.width() / 200.;
yRadius = yRadius * rect.height() / 200.;
}
xRadius = qMin(xRadius, rect.width() / 2);
yRadius = qMin(yRadius, rect.height() / 2);
VGfloat pts[] = {
x1 + xRadius, y1, // MoveTo
x2 - xRadius, y1, // LineTo
x2 - (1 - KAPPA) * xRadius, y1, // CurveTo
x2, y1 + (1 - KAPPA) * yRadius,
x2, y1 + yRadius,
x2, y2 - yRadius, // LineTo
x2, y2 - (1 - KAPPA) * yRadius, // CurveTo
x2 - (1 - KAPPA) * xRadius, y2,
x2 - xRadius, y2,
x1 + xRadius, y2, // LineTo
x1 + (1 - KAPPA) * xRadius, y2, // CurveTo
x1, y2 - (1 - KAPPA) * yRadius,
x1, y2 - yRadius,
x1, y1 + yRadius, // LineTo
x1, y1 + KAPPA * yRadius, // CurveTo
x1 + (1 - KAPPA) * xRadius, y1,
x1 + xRadius, y1
};
#if !defined(QVG_NO_MODIFY_PATH)
VGPath vgpath = roundRectPath;
if (!vgpath) {
vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
10, // segmentCapacityHint
17 * 2, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
vgAppendPathData(vgpath, 10, roundedrect_types, pts);
roundRectPath = vgpath;
} else {
vgModifyPathCoords(vgpath, 0, 9, pts);
}
#else
VGPath vgpath = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
10, // segmentCapacityHint
17 * 2, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
vgAppendPathData(vgpath, 10, roundedrect_types, pts);
#endif
return vgpath;
}
Q_DECL_IMPORT extern QImage qt_imageForBrush(int style, bool invert);
static QImage colorizeBitmap(const QImage &image, const QColor &color)
{
QImage sourceImage = image.convertToFormat(QImage::Format_MonoLSB);
QImage dest = QImage(sourceImage.size(), QImage::Format_ARGB32_Premultiplied);
QRgb fg = PREMUL(color.rgba());
QRgb bg = 0;
int height = sourceImage.height();
int width = sourceImage.width();
for (int y=0; y<height; ++y) {
uchar *source = sourceImage.scanLine(y);
QRgb *target = reinterpret_cast<QRgb *>(dest.scanLine(y));
for (int x=0; x < width; ++x)
target[x] = (source[x>>3] >> (x&7)) & 1 ? fg : bg;
}
return dest;
}
// defined in qpixmapdata_vg.cpp.
const uchar *qt_vg_imageBits(const QImage& image);
static VGImage toVGImage
(const QImage & image, Qt::ImageConversionFlags flags = Qt::AutoColor)
{
QImage img(image);
VGImageFormat format;
switch (img.format()) {
case QImage::Format_Mono:
img = image.convertToFormat(QImage::Format_MonoLSB, flags);
format = VG_BW_1;
break;
case QImage::Format_MonoLSB:
format = VG_BW_1;
break;
case QImage::Format_RGB32:
format = VG_sXRGB_8888;
break;
case QImage::Format_ARGB32:
format = VG_sARGB_8888;
break;
case QImage::Format_ARGB32_Premultiplied:
format = VG_sARGB_8888_PRE;
break;
case QImage::Format_RGB16:
format = VG_sRGB_565;
break;
default:
// Convert everything else into ARGB32_Premultiplied.
img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied, flags);
format = VG_sARGB_8888_PRE;
break;
}
const uchar *pixels = qt_vg_imageBits(img);
VGImage vgImg = QVGImagePool::instance()->createPermanentImage
(format, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData
(vgImg, pixels, img.bytesPerLine(), format, 0, 0,
img.width(), img.height());
return vgImg;
}
static VGImage toVGImageSubRect
(const QImage & image, const QRect& sr,
Qt::ImageConversionFlags flags = Qt::AutoColor)
{
QImage img(image);
VGImageFormat format;
int bpp = 4;
switch (img.format()) {
case QImage::Format_Mono:
case QImage::Format_MonoLSB:
return VG_INVALID_HANDLE;
case QImage::Format_RGB32:
format = VG_sXRGB_8888;
break;
case QImage::Format_ARGB32:
format = VG_sARGB_8888;
break;
case QImage::Format_ARGB32_Premultiplied:
format = VG_sARGB_8888_PRE;
break;
case QImage::Format_RGB16:
format = VG_sRGB_565;
bpp = 2;
break;
default:
// Convert everything else into ARGB32_Premultiplied.
img = image.convertToFormat(QImage::Format_ARGB32_Premultiplied, flags);
format = VG_sARGB_8888_PRE;
break;
}
const uchar *pixels = qt_vg_imageBits(img) + bpp * sr.x() +
img.bytesPerLine() * sr.y();
VGImage vgImg = QVGImagePool::instance()->createPermanentImage
(format, sr.width(), sr.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData
(vgImg, pixels, img.bytesPerLine(), format, 0, 0,
sr.width(), sr.height());
return vgImg;
}
static VGImage toVGImageWithOpacity(const QImage & image, qreal opacity)
{
QImage img(image.size(), QImage::Format_ARGB32_Premultiplied);
img.fill(0);
QPainter painter;
painter.begin(&img);
painter.setOpacity(opacity);
painter.drawImage(0, 0, image);
painter.end();
const uchar *pixels = qt_vg_imageBits(img);
VGImage vgImg = QVGImagePool::instance()->createPermanentImage
(VG_sARGB_8888_PRE, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData
(vgImg, pixels, img.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0,
img.width(), img.height());
return vgImg;
}
static VGImage toVGImageWithOpacitySubRect
(const QImage & image, qreal opacity, const QRect& sr)
{
QImage img(sr.size(), QImage::Format_ARGB32_Premultiplied);
img.fill(0);
QPainter painter;
painter.begin(&img);
painter.setOpacity(opacity);
painter.drawImage(QPoint(0, 0), image, sr);
painter.end();
const uchar *pixels = qt_vg_imageBits(img);
VGImage vgImg = QVGImagePool::instance()->createPermanentImage
(VG_sARGB_8888_PRE, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData
(vgImg, pixels, img.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0,
img.width(), img.height());
return vgImg;
}
VGPaintType QVGPaintEnginePrivate::setBrush
(VGPaint paint, const QBrush& brush, VGMatrixMode mode,
VGPaintType prevType)
{
VGfloat values[5];
setBrushTransform(brush, mode);
// Reset the paint pattern on the brush, which will discard
// the previous VGImage if one was set.
if (prevType == VG_PAINT_TYPE_PATTERN || prevType == (VGPaintType)0)
vgPaintPattern(paint, VG_INVALID_HANDLE);
switch (brush.style()) {
case Qt::SolidPattern: {
// The brush is a solid color.
QColor color(brush.color());
values[0] = color.redF();
values[1] = color.greenF();
values[2] = color.blueF();
values[3] = color.alphaF() * opacity;
if (prevType != VG_PAINT_TYPE_COLOR)
vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetParameterfv(paint, VG_PAINT_COLOR, 4, values);
return VG_PAINT_TYPE_COLOR;
}
case Qt::LinearGradientPattern: {
// The brush is a linear gradient.
Q_ASSERT(brush.gradient()->type() == QGradient::LinearGradient);
const QLinearGradient *grad =
static_cast<const QLinearGradient*>(brush.gradient());
values[0] = grad->start().x();
values[1] = grad->start().y();
values[2] = grad->finalStop().x();
values[3] = grad->finalStop().y();
if (prevType != VG_PAINT_TYPE_LINEAR_GRADIENT)
vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT);
vgSetParameterfv(paint, VG_PAINT_LINEAR_GRADIENT, 4, values);
setupColorRamp(grad, paint);
return VG_PAINT_TYPE_LINEAR_GRADIENT;
}
case Qt::RadialGradientPattern: {
// The brush is a radial gradient.
Q_ASSERT(brush.gradient()->type() == QGradient::RadialGradient);
const QRadialGradient *grad =
static_cast<const QRadialGradient*>(brush.gradient());
values[0] = grad->center().x();
values[1] = grad->center().y();
values[2] = grad->focalPoint().x();
values[3] = grad->focalPoint().y();
values[4] = grad->radius();
if (prevType != VG_PAINT_TYPE_RADIAL_GRADIENT)
vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT);
vgSetParameterfv(paint, VG_PAINT_RADIAL_GRADIENT, 5, values);
setupColorRamp(grad, paint);
return VG_PAINT_TYPE_RADIAL_GRADIENT;
}
case Qt::TexturePattern: {
// The brush is a texture specified by a QPixmap/QImage.
QPixmapData *pd = brush.texture().pixmapData();
if (!pd)
break; // null QPixmap
VGImage vgImg;
bool deref = false;
if (pd->pixelType() == QPixmapData::BitmapType) {
// Colorize bitmaps using the brush color and opacity.
QColor color = brush.color();
if (opacity != 1.0)
color.setAlphaF(color.alphaF() * opacity);
QImage image = colorizeBitmap(*(pd->buffer()), color);
vgImg = toVGImage(image);
deref = true;
} else if (opacity == 1.0) {
if (pd->classId() == QPixmapData::OpenVGClass) {
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
vgImg = vgpd->toVGImage();
// We don't want the pool to reclaim this image
// because we cannot predict when the paint object
// will stop using it. Replacing the image with
// new data will make the paint object invalid.
vgpd->detachImageFromPool();
} else {
vgImg = toVGImage(*(pd->buffer()));
deref = true;
}
} else if (pd->classId() == QPixmapData::OpenVGClass) {
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
vgImg = vgpd->toVGImage(opacity);
vgpd->detachImageFromPool();
} else {
vgImg = toVGImageWithOpacity(*(pd->buffer()), opacity);
deref = true;
}
if (vgImg == VG_INVALID_HANDLE)
break;
if (prevType != VG_PAINT_TYPE_PATTERN)
vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_PATTERN);
vgSetParameteri(paint, VG_PAINT_PATTERN_TILING_MODE, VG_TILE_REPEAT);
vgPaintPattern(paint, vgImg);
if (deref)
vgDestroyImage(vgImg); // Will be valid until pattern is destroyed.
return VG_PAINT_TYPE_PATTERN;
}
case Qt::ConicalGradientPattern: {
// Convert conical gradients into the first stop color.
qWarning() << "QVGPaintEnginePrivate::setBrush: conical gradients are not supported by OpenVG";
Q_ASSERT(brush.gradient()->type() == QGradient::ConicalGradient);
const QConicalGradient *grad =
static_cast<const QConicalGradient*>(brush.gradient());
const QGradientStops stops = grad->stops();
QColor color;
if (stops.size() > 0)
color = stops[0].second;
values[0] = color.redF();
values[1] = color.greenF();
values[2] = color.blueF();
values[3] = color.alphaF() * opacity;
if (prevType != VG_PAINT_TYPE_COLOR)
vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetParameterfv(paint, VG_PAINT_COLOR, 4, values);
return VG_PAINT_TYPE_COLOR;
}
case Qt::Dense1Pattern:
case Qt::Dense2Pattern:
case Qt::Dense3Pattern:
case Qt::Dense4Pattern:
case Qt::Dense5Pattern:
case Qt::Dense6Pattern:
case Qt::Dense7Pattern:
case Qt::HorPattern:
case Qt::VerPattern:
case Qt::CrossPattern:
case Qt::BDiagPattern:
case Qt::FDiagPattern:
case Qt::DiagCrossPattern: {
// The brush is a traditional dotted or cross-hatched pattern brush.
QColor color = brush.color();
if (opacity != 1.0)
color.setAlphaF(color.alphaF() * opacity);
QImage image = colorizeBitmap
(qt_imageForBrush(brush.style(), true), color);
VGImage vgImg = toVGImage(image);
if (prevType != VG_PAINT_TYPE_PATTERN)
vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_PATTERN);
vgSetParameteri(paint, VG_PAINT_PATTERN_TILING_MODE, VG_TILE_REPEAT);
vgPaintPattern(paint, vgImg);
vgDestroyImage(vgImg); // Will stay valid until pattern is destroyed.
return VG_PAINT_TYPE_PATTERN;
}
default: break;
}
return (VGPaintType)0;
}
void QVGPaintEnginePrivate::setPenParams(const QPen& pen)
{
// Note: OpenVG does not support zero-width or cosmetic pens,
// so we have to simulate cosmetic pens by reversing the scale.
VGfloat width = pen.widthF();
if (width <= 0.0f)
width = 1.0f;
if (pen.isCosmetic()) {
if (penScale != 1.0 && penScale != 0.0)
width /= penScale;
}
vgSetf(VG_STROKE_LINE_WIDTH, width);
if (pen.capStyle() == Qt::FlatCap)
vgSetf(VG_STROKE_CAP_STYLE, VG_CAP_BUTT);
else if (pen.capStyle() == Qt::SquareCap)
vgSetf(VG_STROKE_CAP_STYLE, VG_CAP_SQUARE);
else
vgSetf(VG_STROKE_CAP_STYLE, VG_CAP_ROUND);
if (pen.joinStyle() == Qt::MiterJoin) {
vgSetf(VG_STROKE_JOIN_STYLE, VG_JOIN_MITER);
vgSetf(VG_STROKE_MITER_LIMIT, pen.miterLimit());
} else if (pen.joinStyle() == Qt::BevelJoin) {
vgSetf(VG_STROKE_JOIN_STYLE, VG_JOIN_BEVEL);
} else {
vgSetf(VG_STROKE_JOIN_STYLE, VG_JOIN_ROUND);
}
if (pen.style() == Qt::SolidLine) {
vgSetfv(VG_STROKE_DASH_PATTERN, 0, NULL);
} else {
const QVector<qreal> dashPattern = pen.dashPattern();
QVector<VGfloat> currentDashPattern(dashPattern.count());
for (int i = 0; i < dashPattern.count(); ++i)
currentDashPattern[i] = dashPattern[i] * width;
vgSetfv(VG_STROKE_DASH_PATTERN, currentDashPattern.count(), currentDashPattern.data());
vgSetf(VG_STROKE_DASH_PHASE, pen.dashOffset());
vgSetf(VG_STROKE_DASH_PHASE_RESET, VG_FALSE);
}
}
void QVGPaintEnginePrivate::setBrushTransform
(const QBrush& brush, VGMatrixMode mode)
{
// Compute the new brush transformation matrix.
QTransform transform(brush.transform());
if (brushOrigin.x() != 0.0f || brushOrigin.y() != 0.0f)
transform.translate(brushOrigin.x(), brushOrigin.y());
// Bail out if the matrix is the same as last time, to avoid
// updating the VG context state unless absolutely necessary.
// Most applications won't have a brush transformation set,
// which will leave the VG setting at its default of identity.
// Always change the transform if coming out of raw VG mode.
if (mode == VG_MATRIX_FILL_PAINT_TO_USER) {
if (!rawVG && transform == brushTransform)
return;
brushTransform = transform;
} else {
if (!rawVG && transform == penTransform)
return;
penTransform = transform;
}
// Set the brush transformation matrix.
if (mode != matrixMode) {
vgSeti(VG_MATRIX_MODE, mode);
matrixMode = mode;
}
if (transform.isIdentity()) {
vgLoadIdentity();
} else {
VGfloat mat[9];
mat[0] = transform.m11();
mat[1] = transform.m12();
mat[2] = transform.m13();
mat[3] = transform.m21();
mat[4] = transform.m22();
mat[5] = transform.m23();
mat[6] = transform.m31();
mat[7] = transform.m32();
mat[8] = transform.m33();
vgLoadMatrix(mat);
}
}
void QVGPaintEnginePrivate::setupColorRamp(const QGradient *grad, VGPaint paint)
{
QGradient::Spread spread = grad->spread();
VGColorRampSpreadMode spreadMode;
if (spread == QGradient::ReflectSpread)
spreadMode = VG_COLOR_RAMP_SPREAD_REFLECT;
else if (spread == QGradient::RepeatSpread)
spreadMode = VG_COLOR_RAMP_SPREAD_REPEAT;
else
spreadMode = VG_COLOR_RAMP_SPREAD_PAD;
const QGradientStops stops = grad->stops();
int n = 5*stops.size();
QVector<VGfloat> fill_stops(n);
for (int i = 0; i < stops.size(); ++i ) {
QColor col = stops[i].second;
fill_stops[i*5] = stops[i].first;
fill_stops[i*5 + 1] = col.redF();
fill_stops[i*5 + 2] = col.greenF();
fill_stops[i*5 + 3] = col.blueF();
fill_stops[i*5 + 4] = col.alphaF() * opacity;
}
vgSetParameteri(paint, VG_PAINT_COLOR_RAMP_SPREAD_MODE, spreadMode);
vgSetParameteri(paint, VG_PAINT_COLOR_RAMP_PREMULTIPLIED, VG_FALSE);
vgSetParameterfv(paint, VG_PAINT_COLOR_RAMP_STOPS, n, fill_stops.data());
}
QVGPainterState::QVGPainterState(QVGPainterState& other)
: QPainterState(other),
isNew(true), clipRegion(other.clipRegion),
savedDirty(0)
{
}
QVGPainterState::QVGPainterState()
: isNew(true), savedDirty(0)
{
}
QVGPainterState::~QVGPainterState()
{
}
QVGPaintEngine::QVGPaintEngine()
: QPaintEngineEx(*new QVGPaintEnginePrivate)
{
}
QVGPaintEngine::QVGPaintEngine(QVGPaintEnginePrivate &data)
: QPaintEngineEx(data)
{
}
QVGPaintEngine::~QVGPaintEngine()
{
}
QPainterState *QVGPaintEngine::createState(QPainterState *orig) const
{
if (!orig) {
return new QVGPainterState();
} else {
Q_D(const QVGPaintEngine);
QVGPaintEnginePrivate *d2 = const_cast<QVGPaintEnginePrivate*>(d);
QVGPainterState *origState = static_cast<QVGPainterState *>(orig);
origState->savedDirty = d2->dirty;
d2->dirty = 0;
return new QVGPainterState(*origState);
}
}
void QVGPaintEnginePrivate::draw
(VGPath path, const QPen& pen, const QBrush& brush, VGint rule)
{
VGbitfield mode = 0;
if (pen.style() != Qt::NoPen) {
ensurePen(pen);
mode |= VG_STROKE_PATH;
}
if (brush.style() != Qt::NoBrush) {
ensureBrush(brush);
setFillRule(rule);
mode |= VG_FILL_PATH;
}
if (mode != 0) {
ensurePathTransform();
vgDrawPath(path, mode);
}
}
void QVGPaintEnginePrivate::stroke(VGPath path, const QPen& pen)
{
if (pen.style() == Qt::NoPen)
return;
ensurePen(pen);
ensurePathTransform();
vgDrawPath(path, VG_STROKE_PATH);
}
void QVGPaintEnginePrivate::fill(VGPath path, const QBrush& brush, VGint rule)
{
if (brush.style() == Qt::NoBrush)
return;
ensureBrush(brush);
setFillRule(rule);
ensurePathTransform();
vgDrawPath(path, VG_FILL_PATH);
}
bool QVGPaintEngine::begin(QPaintDevice *pdev)
{
Q_UNUSED(pdev);
Q_D(QVGPaintEngine);
// Initialize the VG painting objects if we haven't done it yet.
if (!d->penPaint)
d->initObjects();
// The initial clip region is the entire device area.
QVGPainterState *s = state();
s->clipRegion = defaultClipRegion();
// Initialize the VG state for this paint operation.
restoreState(QPaintEngine::AllDirty);
d->dirty = 0;
d->rawVG = false;
return true;
}
bool QVGPaintEngine::end()
{
return true;
}
void QVGPaintEngine::draw(const QVectorPath &path)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
VGPath vgpath = d->vectorPathToVGPath(path);
if (!path.hasWindingFill())
d->draw(vgpath, s->pen, s->brush, VG_EVEN_ODD);
else
d->draw(vgpath, s->pen, s->brush, VG_NON_ZERO);
vgDestroyPath(vgpath);
}
void QVGPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
{
Q_D(QVGPaintEngine);
VGPath vgpath = d->vectorPathToVGPath(path);
if (!path.hasWindingFill())
d->fill(vgpath, brush, VG_EVEN_ODD);
else
d->fill(vgpath, brush, VG_NON_ZERO);
vgDestroyPath(vgpath);
}
void QVGPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
{
Q_D(QVGPaintEngine);
VGPath vgpath = d->vectorPathToVGPath(path);
d->stroke(vgpath, pen);
vgDestroyPath(vgpath);
}
// Determine if a co-ordinate transform is simple enough to allow
// rectangle-based clipping with vgMask(). Simple transforms most
// often result from origin translations.
static inline bool clipTransformIsSimple(const QTransform& transform)
{
QTransform::TransformationType type = transform.type();
if (type == QTransform::TxNone || type == QTransform::TxTranslate)
return true;
if (type == QTransform::TxRotate) {
// Check for 0, 90, 180, and 270 degree rotations.
// (0 might happen after 4 rotations of 90 degrees).
qreal m11 = transform.m11();
qreal m12 = transform.m12();
qreal m21 = transform.m21();
qreal m22 = transform.m22();
if (m11 == 0.0f && m22 == 0.0f) {
if (m12 == 1.0f && m21 == -1.0f)
return true; // 90 degrees.
else if (m12 == -1.0f && m21 == 1.0f)
return true; // 270 degrees.
} else if (m12 == 0.0f && m21 == 0.0f) {
if (m11 == -1.0f && m22 == -1.0f)
return true; // 180 degrees.
else if (m11 == 1.0f && m22 == 1.0f)
return true; // 0 degrees.
}
}
return false;
}
#if defined(QVG_SCISSOR_CLIP)
void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
d->dirty |= QPaintEngine::DirtyClipRegion;
if (op == Qt::NoClip) {
s->clipRegion = defaultClipRegion();
updateScissor();
return;
}
// We aren't using masking, so handle simple QRectF's only.
if (path.shape() == QVectorPath::RectangleHint &&
path.elementCount() == 4 && clipTransformIsSimple(d->transform)) {
// Clipping region that resulted from QPainter::setClipRect(QRectF).
// Convert it into a QRect and apply.
const qreal *points = path.points();
QRectF rect(points[0], points[1], points[2] - points[0],
points[5] - points[1]);
clip(rect.toRect(), op);
} else {
// The best we can do is clip to the bounding rectangle
// of all control points.
clip(path.controlPointRect().toRect(), op);
}
}
void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
d->dirty |= QPaintEngine::DirtyClipRegion;
switch (op) {
case Qt::NoClip:
{
s->clipRegion = defaultClipRegion();
}
break;
case Qt::ReplaceClip:
{
s->clipRegion = d->transform.map(QRegion(rect));
}
break;
case Qt::IntersectClip:
{
s->clipRegion = s->clipRegion.intersect(d->transform.map(QRegion(rect)));
}
break;
case Qt::UniteClip:
{
s->clipRegion = s->clipRegion.unite(d->transform.map(QRegion(rect)));
}
break;
}
updateScissor();
}
void QVGPaintEngine::clip(const QRegion ®ion, Qt::ClipOperation op)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
d->dirty |= QPaintEngine::DirtyClipRegion;
switch (op) {
case Qt::NoClip:
{
s->clipRegion = defaultClipRegion();
}
break;
case Qt::ReplaceClip:
{
s->clipRegion = d->transform.map(region);
}
break;
case Qt::IntersectClip:
{
s->clipRegion = s->clipRegion.intersect(d->transform.map(region));
}
break;
case Qt::UniteClip:
{
s->clipRegion = s->clipRegion.unite(d->transform.map(region));
}
break;
}
updateScissor();
}
void QVGPaintEngine::clip(const QPainterPath &path, Qt::ClipOperation op)
{
QPaintEngineEx::clip(path, op);
}
#else // !QVG_SCISSOR_CLIP
void QVGPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyClipRegion;
if (op == Qt::NoClip) {
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
vgSeti(VG_MASKING, VG_FALSE);
return;
}
// We don't have vgRenderToMask(), so handle simple QRectF's only.
if (path.shape() == QVectorPath::RectangleHint &&
path.elementCount() == 4 && clipTransformIsSimple(d->transform)) {
// Clipping region that resulted from QPainter::setClipRect(QRectF).
// Convert it into a QRect and apply.
const qreal *points = path.points();
QRectF rect(points[0], points[1], points[2] - points[0],
points[5] - points[1]);
clip(rect.toRect(), op);
return;
}
#if !defined(QVG_NO_RENDER_TO_MASK)
QPaintDevice *pdev = paintDevice();
int width = pdev->width();
int height = pdev->height();
if (op == Qt::ReplaceClip) {
vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
d->maskRect = QRect();
} else if (!d->maskValid) {
d->ensureMask(this, width, height);
}
d->ensurePathTransform();
VGPath vgpath = d->vectorPathToVGPath(path);
switch (op) {
case Qt::ReplaceClip:
case Qt::UniteClip:
vgRenderToMask(vgpath, VG_FILL_PATH, VG_UNION_MASK);
break;
case Qt::IntersectClip:
vgRenderToMask(vgpath, VG_FILL_PATH, VG_INTERSECT_MASK);
break;
default: break;
}
vgDestroyPath(vgpath);
vgSeti(VG_MASKING, VG_TRUE);
d->maskValid = true;
d->maskIsSet = false;
d->scissorMask = false;
#endif
}
void QVGPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyClipRegion;
// If we have a non-simple transform, then use path-based clipping.
if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
QPaintEngineEx::clip(rect, op);
return;
}
switch (op) {
case Qt::NoClip:
{
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
vgSeti(VG_MASKING, VG_FALSE);
}
break;
case Qt::ReplaceClip:
{
QRect r = d->transform.mapRect(rect);
if (isDefaultClipRect(r)) {
// Replacing the clip with a full-window region is the
// same as turning off clipping.
if (d->maskValid)
vgSeti(VG_MASKING, VG_FALSE);
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
} else {
// Special case: if the intersection of the system
// clip and "r" is a single rectangle, then use the
// scissor for clipping. We try to avoid allocating a
// QRegion copy on the heap for the test if we can.
QRegion clip = d->systemClip; // Reference-counted, no alloc.
QRect clipRect;
if (clip.rectCount() == 1) {
clipRect = clip.boundingRect().intersected(r);
} else if (clip.isEmpty()) {
clipRect = r;
} else {
clip = clip.intersect(r);
if (clip.rectCount() != 1) {
d->maskValid = false;
d->maskIsSet = false;
d->scissorMask = false;
d->maskRect = QRect();
d->modifyMask(this, VG_FILL_MASK, r);
break;
}
clipRect = clip.boundingRect();
}
d->maskValid = false;
d->maskIsSet = false;
d->scissorMask = true;
d->maskRect = clipRect;
vgSeti(VG_MASKING, VG_FALSE);
updateScissor();
}
}
break;
case Qt::IntersectClip:
{
QRect r = d->transform.mapRect(rect);
if (!d->maskValid) {
// Mask has not been used yet, so intersect with
// the previous scissor-based region in maskRect.
if (d->scissorMask)
r = r.intersect(d->maskRect);
if (isDefaultClipRect(r)) {
// The clip is the full window, so turn off clipping.
d->maskIsSet = true;
d->maskRect = QRect();
} else {
// Activate the scissor on a smaller maskRect.
d->maskIsSet = false;
d->maskRect = r;
}
d->scissorMask = true;
updateScissor();
} else if (d->maskIsSet && isDefaultClipRect(r)) {
// Intersecting a full-window clip with a full-window
// region is the same as turning off clipping.
if (d->maskValid)
vgSeti(VG_MASKING, VG_FALSE);
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
} else {
d->modifyMask(this, VG_INTERSECT_MASK, r);
}
}
break;
case Qt::UniteClip:
{
// If we already have a full-window clip, then uniting a
// region with it will do nothing. Otherwise union.
if (!(d->maskIsSet))
d->modifyMask(this, VG_UNION_MASK, d->transform.mapRect(rect));
}
break;
}
}
void QVGPaintEngine::clip(const QRegion ®ion, Qt::ClipOperation op)
{
Q_D(QVGPaintEngine);
// Use the QRect case if the region consists of a single rectangle.
if (region.rectCount() == 1) {
clip(region.boundingRect(), op);
return;
}
d->dirty |= QPaintEngine::DirtyClipRegion;
// If we have a non-simple transform, then use path-based clipping.
if (op != Qt::NoClip && !clipTransformIsSimple(d->transform)) {
QPaintEngineEx::clip(region, op);
return;
}
switch (op) {
case Qt::NoClip:
{
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
vgSeti(VG_MASKING, VG_FALSE);
}
break;
case Qt::ReplaceClip:
{
QRegion r = d->transform.map(region);
if (isDefaultClipRegion(r)) {
// Replacing the clip with a full-window region is the
// same as turning off clipping.
if (d->maskValid)
vgSeti(VG_MASKING, VG_FALSE);
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
} else {
// Special case: if the intersection of the system
// clip and the region is a single rectangle, then
// use the scissor for clipping.
QRegion clip = d->systemClip;
if (clip.isEmpty())
clip = r;
else
clip = clip.intersect(r);
if (clip.rectCount() == 1) {
d->maskValid = false;
d->maskIsSet = false;
d->scissorMask = true;
d->maskRect = clip.boundingRect();
vgSeti(VG_MASKING, VG_FALSE);
updateScissor();
} else {
d->maskValid = false;
d->maskIsSet = false;
d->scissorMask = false;
d->maskRect = QRect();
d->modifyMask(this, VG_FILL_MASK, r);
}
}
}
break;
case Qt::IntersectClip:
{
if (region.rectCount() != 1) {
// If there is more than one rectangle, then intersecting
// the rectangles one by one in modifyMask() will not give
// the desired result. So fall back to path-based clipping.
QPaintEngineEx::clip(region, op);
return;
}
QRegion r = d->transform.map(region);
if (d->maskIsSet && isDefaultClipRegion(r)) {
// Intersecting a full-window clip with a full-window
// region is the same as turning off clipping.
if (d->maskValid)
vgSeti(VG_MASKING, VG_FALSE);
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
} else {
d->modifyMask(this, VG_INTERSECT_MASK, r);
}
}
break;
case Qt::UniteClip:
{
// If we already have a full-window clip, then uniting a
// region with it will do nothing. Otherwise union.
if (!(d->maskIsSet))
d->modifyMask(this, VG_UNION_MASK, d->transform.map(region));
}
break;
}
}
#if !defined(QVG_NO_RENDER_TO_MASK)
// Copied from qpathclipper.cpp.
static bool qt_vg_pathToRect(const QPainterPath &path, QRectF *rect)
{
if (path.elementCount() != 5)
return false;
const bool mightBeRect = path.elementAt(0).isMoveTo()
&& path.elementAt(1).isLineTo()
&& path.elementAt(2).isLineTo()
&& path.elementAt(3).isLineTo()
&& path.elementAt(4).isLineTo();
if (!mightBeRect)
return false;
const qreal x1 = path.elementAt(0).x;
const qreal y1 = path.elementAt(0).y;
const qreal x2 = path.elementAt(1).x;
const qreal y2 = path.elementAt(2).y;
if (path.elementAt(1).y != y1)
return false;
if (path.elementAt(2).x != x2)
return false;
if (path.elementAt(3).x != x1 || path.elementAt(3).y != y2)
return false;
if (path.elementAt(4).x != x1 || path.elementAt(4).y != y1)
return false;
if (rect)
*rect = QRectF(QPointF(x1, y1), QPointF(x2, y2));
return true;
}
#endif
void QVGPaintEngine::clip(const QPainterPath &path, Qt::ClipOperation op)
{
#if !defined(QVG_NO_RENDER_TO_MASK)
Q_D(QVGPaintEngine);
// If the path is a simple rectangle, then use clip(QRect) instead.
QRectF simpleRect;
if (qt_vg_pathToRect(path, &simpleRect)) {
clip(simpleRect.toRect(), op);
return;
}
d->dirty |= QPaintEngine::DirtyClipRegion;
if (op == Qt::NoClip) {
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
vgSeti(VG_MASKING, VG_FALSE);
return;
}
QPaintDevice *pdev = paintDevice();
int width = pdev->width();
int height = pdev->height();
if (op == Qt::ReplaceClip) {
vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
d->maskRect = QRect();
} else if (!d->maskValid) {
d->ensureMask(this, width, height);
}
d->ensurePathTransform();
VGPath vgpath = d->painterPathToVGPath(path);
switch (op) {
case Qt::ReplaceClip:
case Qt::UniteClip:
vgRenderToMask(vgpath, VG_FILL_PATH, VG_UNION_MASK);
break;
case Qt::IntersectClip:
vgRenderToMask(vgpath, VG_FILL_PATH, VG_INTERSECT_MASK);
break;
default: break;
}
vgDestroyPath(vgpath);
vgSeti(VG_MASKING, VG_TRUE);
d->maskValid = true;
d->maskIsSet = false;
d->scissorMask = false;
#else
QPaintEngineEx::clip(path, op);
#endif
}
void QVGPaintEnginePrivate::ensureMask
(QVGPaintEngine *engine, int width, int height)
{
scissorMask = false;
if (maskIsSet) {
vgMask(VG_INVALID_HANDLE, VG_FILL_MASK, 0, 0, width, height);
maskRect = QRect();
} else {
vgMask(VG_INVALID_HANDLE, VG_CLEAR_MASK, 0, 0, width, height);
if (maskRect.isValid()) {
vgMask(VG_INVALID_HANDLE, VG_FILL_MASK,
maskRect.x(), height - maskRect.y() - maskRect.height(),
maskRect.width(), maskRect.height());
maskRect = QRect();
engine->updateScissor();
}
}
}
void QVGPaintEnginePrivate::modifyMask
(QVGPaintEngine *engine, VGMaskOperation op, const QRegion& region)
{
QPaintDevice *pdev = engine->paintDevice();
int width = pdev->width();
int height = pdev->height();
if (!maskValid)
ensureMask(engine, width, height);
QVector<QRect> rects = region.rects();
for (int i = 0; i < rects.size(); ++i) {
vgMask(VG_INVALID_HANDLE, op,
rects[i].x(), height - rects[i].y() - rects[i].height(),
rects[i].width(), rects[i].height());
}
vgSeti(VG_MASKING, VG_TRUE);
maskValid = true;
maskIsSet = false;
scissorMask = false;
}
void QVGPaintEnginePrivate::modifyMask
(QVGPaintEngine *engine, VGMaskOperation op, const QRect& rect)
{
QPaintDevice *pdev = engine->paintDevice();
int width = pdev->width();
int height = pdev->height();
if (!maskValid)
ensureMask(engine, width, height);
if (rect.isValid()) {
vgMask(VG_INVALID_HANDLE, op,
rect.x(), height - rect.y() - rect.height(),
rect.width(), rect.height());
}
vgSeti(VG_MASKING, VG_TRUE);
maskValid = true;
maskIsSet = false;
scissorMask = false;
}
#endif // !QVG_SCISSOR_CLIP
void QVGPaintEngine::updateScissor()
{
Q_D(QVGPaintEngine);
QRegion region = d->systemClip;
#if defined(QVG_SCISSOR_CLIP)
// Using the scissor to do clipping, so combine the systemClip
// with the current painting clipRegion.
QVGPainterState *s = state();
if (s->clipEnabled) {
if (region.isEmpty())
region = s->clipRegion;
else
region = region.intersect(s->clipRegion);
if (isDefaultClipRegion(region)) {
// The scissor region is the entire drawing surface,
// so there is no point doing any scissoring.
vgSeti(VG_SCISSORING, VG_FALSE);
d->scissorActive = false;
d->scissorDirty = false;
return;
}
} else
#endif
{
#if !defined(QVG_SCISSOR_CLIP)
// Combine the system clip with the simple mask rectangle.
if (d->scissorMask) {
if (region.isEmpty())
region = d->maskRect;
else
region = region.intersect(d->maskRect);
if (isDefaultClipRegion(region)) {
// The scissor region is the entire drawing surface,
// so there is no point doing any scissoring.
vgSeti(VG_SCISSORING, VG_FALSE);
d->scissorActive = false;
d->scissorDirty = false;
return;
}
} else
#endif
// Disable the scissor completely if the system clip is empty.
if (region.isEmpty()) {
vgSeti(VG_SCISSORING, VG_FALSE);
d->scissorActive = false;
d->scissorDirty = false;
return;
}
}
if (d->scissorActive && region == d->scissorRegion && !d->scissorDirty)
return;
QVector<QRect> rects = region.rects();
int count = rects.count();
if (count > d->maxScissorRects)
count = d->maxScissorRects;
QVarLengthArray<VGint> params(count * 4);
int height = paintDevice()->height();
for (int i = 0; i < count; ++i) {
params[i * 4 + 0] = rects[i].x();
params[i * 4 + 1] = height - rects[i].y() - rects[i].height();
params[i * 4 + 2] = rects[i].width();
params[i * 4 + 3] = rects[i].height();
}
vgSetiv(VG_SCISSOR_RECTS, count * 4, params.data());
vgSeti(VG_SCISSORING, VG_TRUE);
d->scissorDirty = false;
d->scissorActive = true;
d->scissorRegion = region;
}
QRegion QVGPaintEngine::defaultClipRegion()
{
// The default clip region for a paint device is the whole drawing area.
QPaintDevice *pdev = paintDevice();
return QRegion(0, 0, pdev->width(), pdev->height());
}
bool QVGPaintEngine::isDefaultClipRegion(const QRegion& region)
{
if (region.rectCount() != 1)
return false;
QPaintDevice *pdev = paintDevice();
int width = pdev->width();
int height = pdev->height();
QRect rect = region.boundingRect();
return (rect.x() == 0 && rect.y() == 0 &&
rect.width() == width && rect.height() == height);
}
bool QVGPaintEngine::isDefaultClipRect(const QRect& rect)
{
QPaintDevice *pdev = paintDevice();
int width = pdev->width();
int height = pdev->height();
return (rect.x() == 0 && rect.y() == 0 &&
rect.width() == width && rect.height() == height);
}
void QVGPaintEngine::clipEnabledChanged()
{
#if defined(QVG_SCISSOR_CLIP)
updateScissor();
#else
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
d->dirty |= QPaintEngine::DirtyClipEnabled;
if (s->clipEnabled && s->clipOperation != Qt::NoClip) {
// Replay the entire clip stack to put the mask into the right state.
d->maskValid = false;
d->maskIsSet = true;
d->scissorMask = false;
d->maskRect = QRect();
s->clipRegion = defaultClipRegion();
d->replayClipOperations();
d->transform = s->transform();
d->updateTransform(paintDevice());
} else {
vgSeti(VG_MASKING, VG_FALSE);
d->maskValid = false;
d->maskIsSet = false;
d->scissorMask = false;
d->maskRect = QRect();
}
#endif
}
void QVGPaintEngine::penChanged()
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyPen;
}
void QVGPaintEngine::brushChanged()
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyBrush;
}
void QVGPaintEngine::brushOriginChanged()
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyBrushOrigin;
d->brushOrigin = state()->brushOrigin;
d->forcePenChange = true;
d->forceBrushChange = true;
}
void QVGPaintEngine::opacityChanged()
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyOpacity;
d->opacity = state()->opacity;
d->forcePenChange = true;
d->forceBrushChange = true;
}
void QVGPaintEngine::compositionModeChanged()
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyCompositionMode;
VGBlendMode vgMode = VG_BLEND_SRC_OVER;
switch (state()->composition_mode) {
case QPainter::CompositionMode_SourceOver:
vgMode = VG_BLEND_SRC_OVER;
break;
case QPainter::CompositionMode_DestinationOver:
vgMode = VG_BLEND_DST_OVER;
break;
case QPainter::CompositionMode_Source:
vgMode = VG_BLEND_SRC;
break;
case QPainter::CompositionMode_SourceIn:
vgMode = VG_BLEND_SRC_IN;
break;
case QPainter::CompositionMode_DestinationIn:
vgMode = VG_BLEND_DST_IN;
break;
case QPainter::CompositionMode_Plus:
vgMode = VG_BLEND_ADDITIVE;
break;
case QPainter::CompositionMode_Multiply:
vgMode = VG_BLEND_MULTIPLY;
break;
case QPainter::CompositionMode_Screen:
vgMode = VG_BLEND_SCREEN;
break;
case QPainter::CompositionMode_Darken:
vgMode = VG_BLEND_DARKEN;
break;
case QPainter::CompositionMode_Lighten:
vgMode = VG_BLEND_LIGHTEN;
break;
default:
qWarning() << "QVGPaintEngine::compositionModeChanged unsupported mode" << state()->composition_mode;
break; // Fall back to VG_BLEND_SRC_OVER.
}
d->setBlendMode(vgMode);
}
void QVGPaintEngine::renderHintsChanged()
{
Q_D(QVGPaintEngine);
d->dirty |= QPaintEngine::DirtyHints;
QPainter::RenderHints hints = state()->renderHints;
VGRenderingQuality rq =
(hints & QPainter::Antialiasing)
? VG_RENDERING_QUALITY_BETTER
: VG_RENDERING_QUALITY_NONANTIALIASED;
VGImageQuality iq =
(hints & QPainter::SmoothPixmapTransform)
? VG_IMAGE_QUALITY_BETTER
: VG_IMAGE_QUALITY_NONANTIALIASED;
d->setRenderingQuality(rq);
d->setImageQuality(iq);
}
void QVGPaintEngine::transformChanged()
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
d->dirty |= QPaintEngine::DirtyTransform;
d->transform = s->transform();
qreal oldPenScale = d->penScale;
d->updateTransform(paintDevice());
if (d->penScale != oldPenScale)
d->forcePenChange = true;
}
bool QVGPaintEngine::clearRect(const QRectF &rect, const QColor &color)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
if (!s->clipEnabled || s->clipOperation == Qt::NoClip) {
QRect r = d->transform.mapRect(rect).toRect();
int height = paintDevice()->height();
if (d->clearColor != color || d->clearOpacity != s->opacity) {
VGfloat values[4];
values[0] = color.redF();
values[1] = color.greenF();
values[2] = color.blueF();
values[3] = color.alphaF() * s->opacity;
vgSetfv(VG_CLEAR_COLOR, 4, values);
d->clearColor = color;
d->clearOpacity = s->opacity;
}
vgClear(r.x(), height - r.y() - r.height(),
r.width(), r.height());
return true;
}
return false;
}
void QVGPaintEngine::fillRect(const QRectF &rect, const QBrush &brush)
{
Q_D(QVGPaintEngine);
if (brush.style() == Qt::NoBrush)
return;
// Check to see if we can use vgClear() for faster filling.
if (brush.style() == Qt::SolidPattern && brush.isOpaque() &&
clipTransformIsSimple(d->transform) && d->opacity == 1.0f &&
clearRect(rect, brush.color())) {
return;
}
#if !defined(QVG_NO_MODIFY_PATH)
VGfloat coords[8];
if (d->simpleTransform) {
coords[0] = rect.x();
coords[1] = rect.y();
coords[2] = rect.x() + rect.width();
coords[3] = coords[1];
coords[4] = coords[2];
coords[5] = rect.y() + rect.height();
coords[6] = coords[0];
coords[7] = coords[5];
} else {
QPointF tl = d->transform.map(rect.topLeft());
QPointF tr = d->transform.map(rect.topRight());
QPointF bl = d->transform.map(rect.bottomLeft());
QPointF br = d->transform.map(rect.bottomRight());
coords[0] = tl.x();
coords[1] = tl.y();
coords[2] = tr.x();
coords[3] = tr.y();
coords[4] = br.x();
coords[5] = br.y();
coords[6] = bl.x();
coords[7] = bl.y();
}
vgModifyPathCoords(d->rectPath, 0, 4, coords);
d->fill(d->rectPath, brush);
#else
QPaintEngineEx::fillRect(rect, brush);
#endif
}
void QVGPaintEngine::fillRect(const QRectF &rect, const QColor &color)
{
Q_D(QVGPaintEngine);
// Check to see if we can use vgClear() for faster filling.
if (clipTransformIsSimple(d->transform) && d->opacity == 1.0f && color.alpha() == 255 &&
clearRect(rect, color)) {
return;
}
#if !defined(QVG_NO_MODIFY_PATH)
VGfloat coords[8];
if (d->simpleTransform) {
coords[0] = rect.x();
coords[1] = rect.y();
coords[2] = rect.x() + rect.width();
coords[3] = coords[1];
coords[4] = coords[2];
coords[5] = rect.y() + rect.height();
coords[6] = coords[0];
coords[7] = coords[5];
} else {
QPointF tl = d->transform.map(rect.topLeft());
QPointF tr = d->transform.map(rect.topRight());
QPointF bl = d->transform.map(rect.bottomLeft());
QPointF br = d->transform.map(rect.bottomRight());
coords[0] = tl.x();
coords[1] = tl.y();
coords[2] = tr.x();
coords[3] = tr.y();
coords[4] = br.x();
coords[5] = br.y();
coords[6] = bl.x();
coords[7] = bl.y();
}
vgModifyPathCoords(d->rectPath, 0, 4, coords);
d->fill(d->rectPath, QBrush(color));
#else
QPaintEngineEx::fillRect(rect, QBrush(color));
#endif
}
void QVGPaintEngine::drawRoundedRect(const QRectF &rect, qreal xrad, qreal yrad, Qt::SizeMode mode)
{
Q_D(QVGPaintEngine);
if (d->simpleTransform) {
QVGPainterState *s = state();
VGPath vgpath = d->roundedRectPath(rect, xrad, yrad, mode);
d->draw(vgpath, s->pen, s->brush);
#if defined(QVG_NO_MODIFY_PATH)
vgDestroyPath(vgpath);
#endif
} else {
QPaintEngineEx::drawRoundedRect(rect, xrad, yrad, mode);
}
}
void QVGPaintEngine::drawRects(const QRect *rects, int rectCount)
{
#if !defined(QVG_NO_MODIFY_PATH)
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
for (int i = 0; i < rectCount; ++i, ++rects) {
VGfloat coords[8];
if (d->simpleTransform) {
coords[0] = rects->x();
coords[1] = rects->y();
coords[2] = rects->x() + rects->width();
coords[3] = coords[1];
coords[4] = coords[2];
coords[5] = rects->y() + rects->height();
coords[6] = coords[0];
coords[7] = coords[5];
} else {
QPointF tl = d->transform.map(QPointF(rects->x(), rects->y()));
QPointF tr = d->transform.map(QPointF(rects->x() + rects->width(),
rects->y()));
QPointF bl = d->transform.map(QPointF(rects->x(),
rects->y() + rects->height()));
QPointF br = d->transform.map(QPointF(rects->x() + rects->width(),
rects->y() + rects->height()));
coords[0] = tl.x();
coords[1] = tl.y();
coords[2] = tr.x();
coords[3] = tr.y();
coords[4] = br.x();
coords[5] = br.y();
coords[6] = bl.x();
coords[7] = bl.y();
}
vgModifyPathCoords(d->rectPath, 0, 4, coords);
d->draw(d->rectPath, s->pen, s->brush);
}
#else
QPaintEngineEx::drawRects(rects, rectCount);
#endif
}
void QVGPaintEngine::drawRects(const QRectF *rects, int rectCount)
{
#if !defined(QVG_NO_MODIFY_PATH)
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
for (int i = 0; i < rectCount; ++i, ++rects) {
VGfloat coords[8];
if (d->simpleTransform) {
coords[0] = rects->x();
coords[1] = rects->y();
coords[2] = rects->x() + rects->width();
coords[3] = coords[1];
coords[4] = coords[2];
coords[5] = rects->y() + rects->height();
coords[6] = coords[0];
coords[7] = coords[5];
} else {
QPointF tl = d->transform.map(rects->topLeft());
QPointF tr = d->transform.map(rects->topRight());
QPointF bl = d->transform.map(rects->bottomLeft());
QPointF br = d->transform.map(rects->bottomRight());
coords[0] = tl.x();
coords[1] = tl.y();
coords[2] = tr.x();
coords[3] = tr.y();
coords[4] = br.x();
coords[5] = br.y();
coords[6] = bl.x();
coords[7] = bl.y();
}
vgModifyPathCoords(d->rectPath, 0, 4, coords);
d->draw(d->rectPath, s->pen, s->brush);
}
#else
QPaintEngineEx::drawRects(rects, rectCount);
#endif
}
void QVGPaintEngine::drawLines(const QLine *lines, int lineCount)
{
#if !defined(QVG_NO_MODIFY_PATH)
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
for (int i = 0; i < lineCount; ++i, ++lines) {
VGfloat coords[4];
if (d->simpleTransform) {
coords[0] = lines->x1();
coords[1] = lines->y1();
coords[2] = lines->x2();
coords[3] = lines->y2();
} else {
QPointF p1 = d->transform.map(QPointF(lines->x1(), lines->y1()));
QPointF p2 = d->transform.map(QPointF(lines->x2(), lines->y2()));
coords[0] = p1.x();
coords[1] = p1.y();
coords[2] = p2.x();
coords[3] = p2.y();
}
vgModifyPathCoords(d->linePath, 0, 2, coords);
d->stroke(d->linePath, s->pen);
}
#else
QPaintEngineEx::drawLines(lines, lineCount);
#endif
}
void QVGPaintEngine::drawLines(const QLineF *lines, int lineCount)
{
#if !defined(QVG_NO_MODIFY_PATH)
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
for (int i = 0; i < lineCount; ++i, ++lines) {
VGfloat coords[4];
if (d->simpleTransform) {
coords[0] = lines->x1();
coords[1] = lines->y1();
coords[2] = lines->x2();
coords[3] = lines->y2();
} else {
QPointF p1 = d->transform.map(lines->p1());
QPointF p2 = d->transform.map(lines->p2());
coords[0] = p1.x();
coords[1] = p1.y();
coords[2] = p2.x();
coords[3] = p2.y();
}
vgModifyPathCoords(d->linePath, 0, 2, coords);
d->stroke(d->linePath, s->pen);
}
#else
QPaintEngineEx::drawLines(lines, lineCount);
#endif
}
void QVGPaintEngine::drawEllipse(const QRectF &r)
{
// Based on the description of vguEllipse() in the OpenVG specification.
// We don't use vguEllipse(), to avoid unnecessary library dependencies.
Q_D(QVGPaintEngine);
if (d->simpleTransform) {
QVGPainterState *s = state();
VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
4, // segmentCapacityHint
12, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
static VGubyte segments[4] = {
VG_MOVE_TO_ABS,
VG_SCCWARC_TO_REL,
VG_SCCWARC_TO_REL,
VG_CLOSE_PATH
};
VGfloat coords[12];
VGfloat halfwid = r.width() / 2;
VGfloat halfht = r.height() / 2;
coords[0] = r.x() + r.width();
coords[1] = r.y() + halfht;
coords[2] = halfwid;
coords[3] = halfht;
coords[4] = 0.0f;
coords[5] = -r.width();
coords[6] = 0.0f;
coords[7] = halfwid;
coords[8] = halfht;
coords[9] = 0.0f;
coords[10] = r.width();
coords[11] = 0.0f;
vgAppendPathData(path, 4, segments, coords);
d->draw(path, s->pen, s->brush);
vgDestroyPath(path);
} else {
// The projective transform version of an ellipse is difficult.
// Generate a QVectorPath containing cubic curves and transform that.
QPaintEngineEx::drawEllipse(r);
}
}
void QVGPaintEngine::drawEllipse(const QRect &r)
{
drawEllipse(QRectF(r));
}
void QVGPaintEngine::drawPath(const QPainterPath &path)
{
// Shortcut past the QPainterPath -> QVectorPath conversion,
// converting the QPainterPath directly into a VGPath.
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
VGPath vgpath = d->painterPathToVGPath(path);
if (path.fillRule() == Qt::OddEvenFill)
d->draw(vgpath, s->pen, s->brush, VG_EVEN_ODD);
else
d->draw(vgpath, s->pen, s->brush, VG_NON_ZERO);
vgDestroyPath(vgpath);
}
void QVGPaintEngine::drawPoints(const QPointF *points, int pointCount)
{
#if !defined(QVG_NO_MODIFY_PATH)
Q_D(QVGPaintEngine);
// Set up a new pen if necessary.
QPen pen = state()->pen;
if (pen.style() == Qt::NoPen)
return;
if (pen.capStyle() == Qt::FlatCap)
pen.setCapStyle(Qt::SquareCap);
for (int i = 0; i < pointCount; ++i, ++points) {
VGfloat coords[4];
if (d->simpleTransform) {
coords[0] = points->x();
coords[1] = points->y();
coords[2] = coords[0];
coords[3] = coords[1];
} else {
QPointF p = d->transform.map(*points);
coords[0] = p.x();
coords[1] = p.y();
coords[2] = coords[0];
coords[3] = coords[1];
}
vgModifyPathCoords(d->linePath, 0, 2, coords);
d->stroke(d->linePath, pen);
}
#else
QPaintEngineEx::drawPoints(points, pointCount);
#endif
}
void QVGPaintEngine::drawPoints(const QPoint *points, int pointCount)
{
#if !defined(QVG_NO_MODIFY_PATH)
Q_D(QVGPaintEngine);
// Set up a new pen if necessary.
QPen pen = state()->pen;
if (pen.style() == Qt::NoPen)
return;
if (pen.capStyle() == Qt::FlatCap)
pen.setCapStyle(Qt::SquareCap);
for (int i = 0; i < pointCount; ++i, ++points) {
VGfloat coords[4];
if (d->simpleTransform) {
coords[0] = points->x();
coords[1] = points->y();
coords[2] = coords[0];
coords[3] = coords[1];
} else {
QPointF p = d->transform.map(QPointF(*points));
coords[0] = p.x();
coords[1] = p.y();
coords[2] = coords[0];
coords[3] = coords[1];
}
vgModifyPathCoords(d->linePath, 0, 2, coords);
d->stroke(d->linePath, pen);
}
#else
QPaintEngineEx::drawPoints(points, pointCount);
#endif
}
void QVGPaintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
pointCount + 1, // segmentCapacityHint
pointCount * 2, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
QVarLengthArray<VGfloat, 16> coords;
QVarLengthArray<VGubyte, 10> segments;
for (int i = 0; i < pointCount; ++i, ++points) {
if (d->simpleTransform) {
coords.append(points->x());
coords.append(points->y());
} else {
QPointF temp = d->transform.map(*points);
coords.append(temp.x());
coords.append(temp.y());
}
if (i == 0)
segments.append(VG_MOVE_TO_ABS);
else
segments.append(VG_LINE_TO_ABS);
}
if (mode != QPaintEngine::PolylineMode)
segments.append(VG_CLOSE_PATH);
vgAppendPathData(path, segments.count(),
segments.constData(), coords.constData());
switch (mode) {
case QPaintEngine::WindingMode:
d->draw(path, s->pen, s->brush, VG_NON_ZERO);
break;
case QPaintEngine::PolylineMode:
d->stroke(path, s->pen);
break;
default:
d->draw(path, s->pen, s->brush, VG_EVEN_ODD);
break;
}
vgDestroyPath(path);
}
void QVGPaintEngine::drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode)
{
Q_D(QVGPaintEngine);
QVGPainterState *s = state();
VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
pointCount + 1, // segmentCapacityHint
pointCount * 2, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
QVarLengthArray<VGfloat, 16> coords;
QVarLengthArray<VGubyte, 10> segments;
for (int i = 0; i < pointCount; ++i, ++points) {
if (d->simpleTransform) {
coords.append(points->x());
coords.append(points->y());
} else {
QPointF temp = d->transform.map(QPointF(*points));
coords.append(temp.x());
coords.append(temp.y());
}
if (i == 0)
segments.append(VG_MOVE_TO_ABS);
else
segments.append(VG_LINE_TO_ABS);
}
if (mode != QPaintEngine::PolylineMode)
segments.append(VG_CLOSE_PATH);
vgAppendPathData(path, segments.count(),
segments.constData(), coords.constData());
switch (mode) {
case QPaintEngine::WindingMode:
d->draw(path, s->pen, s->brush, VG_NON_ZERO);
break;
case QPaintEngine::PolylineMode:
d->stroke(path, s->pen);
break;
default:
d->draw(path, s->pen, s->brush, VG_EVEN_ODD);
break;
}
vgDestroyPath(path);
}
void QVGPaintEnginePrivate::setImageOptions()
{
if (opacity != 1.0f && simpleTransform) {
if (opacity != paintOpacity) {
VGfloat values[4];
values[0] = 1.0f;
values[1] = 1.0f;
values[2] = 1.0f;
values[3] = opacity;
vgSetParameterfv(opacityPaint, VG_PAINT_COLOR, 4, values);
paintOpacity = opacity;
}
if (fillPaint != opacityPaint) {
vgSetPaint(opacityPaint, VG_FILL_PATH);
fillPaint = opacityPaint;
}
setImageMode(VG_DRAW_IMAGE_MULTIPLY);
} else {
setImageMode(VG_DRAW_IMAGE_NORMAL);
}
}
static void drawVGImage(QVGPaintEnginePrivate *d,
const QRectF& r, VGImage vgImg,
const QSize& imageSize, const QRectF& sr)
{
if (vgImg == VG_INVALID_HANDLE)
return;
VGImage child = VG_INVALID_HANDLE;
if (sr.topLeft().isNull() && sr.size() == imageSize) {
child = vgImg;
} else {
QRect src = sr.toRect();
#if !defined(QT_SHIVAVG)
child = vgChildImage(vgImg, src.x(), src.y(), src.width(), src.height());
#else
child = vgImg; // XXX: ShivaVG doesn't have vgChildImage().
#endif
}
QTransform transform(d->imageTransform);
VGfloat scaleX = sr.width() == 0.0f ? 0.0f : r.width() / sr.width();
VGfloat scaleY = sr.height() == 0.0f ? 0.0f : r.height() / sr.height();
transform.translate(r.x(), r.y());
transform.scale(scaleX, scaleY);
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
d->setImageOptions();
vgDrawImage(child);
if(child != vgImg)
vgDestroyImage(child);
}
static void drawVGImage(QVGPaintEnginePrivate *d,
const QPointF& pos, VGImage vgImg)
{
if (vgImg == VG_INVALID_HANDLE)
return;
QTransform transform(d->imageTransform);
transform.translate(pos.x(), pos.y());
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
d->setImageOptions();
vgDrawImage(vgImg);
}
// Used by qpixmapfilter_vg.cpp to draw filtered VGImage's.
void qt_vg_drawVGImage(QPainter *painter, const QPointF& pos, VGImage vgImg)
{
QVGPaintEngine *engine =
static_cast<QVGPaintEngine *>(painter->paintEngine());
drawVGImage(engine->vgPrivate(), pos, vgImg);
}
// Used by qpixmapfilter_vg.cpp to draw filtered VGImage's as a stencil.
void qt_vg_drawVGImageStencil
(QPainter *painter, const QPointF& pos, VGImage vgImg, const QBrush& brush)
{
QVGPaintEngine *engine =
static_cast<QVGPaintEngine *>(painter->paintEngine());
QVGPaintEnginePrivate *d = engine->vgPrivate();
QTransform transform(d->imageTransform);
transform.translate(pos.x(), pos.y());
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
d->ensureBrush(brush);
d->setImageMode(VG_DRAW_IMAGE_STENCIL);
vgDrawImage(vgImg);
}
void QVGPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
QPixmapData *pd = pm.pixmapData();
if (!pd)
return; // null QPixmap
if (pd->classId() == QPixmapData::OpenVGClass) {
Q_D(QVGPaintEngine);
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
if (!vgpd->isValid())
return;
if (d->simpleTransform)
drawVGImage(d, r, vgpd->toVGImage(), vgpd->size(), sr);
else
drawVGImage(d, r, vgpd->toVGImage(d->opacity), vgpd->size(), sr);
} else {
drawImage(r, *(pd->buffer()), sr, Qt::AutoColor);
}
}
void QVGPaintEngine::drawPixmap(const QPointF &pos, const QPixmap &pm)
{
QPixmapData *pd = pm.pixmapData();
if (!pd)
return; // null QPixmap
if (pd->classId() == QPixmapData::OpenVGClass) {
Q_D(QVGPaintEngine);
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
if (!vgpd->isValid())
return;
if (d->simpleTransform)
drawVGImage(d, pos, vgpd->toVGImage());
else
drawVGImage(d, pos, vgpd->toVGImage(d->opacity));
} else {
drawImage(pos, *(pd->buffer()));
}
}
void QVGPaintEngine::drawImage
(const QRectF &r, const QImage &image, const QRectF &sr,
Qt::ImageConversionFlags flags)
{
Q_D(QVGPaintEngine);
VGImage vgImg;
if (d->simpleTransform || d->opacity == 1.0f)
vgImg = toVGImageSubRect(image, sr.toRect(), flags);
else
vgImg = toVGImageWithOpacitySubRect(image, d->opacity, sr.toRect());
if (vgImg != VG_INVALID_HANDLE) {
if (r.size() == sr.size()) {
drawVGImage(d, r.topLeft(), vgImg);
} else {
drawVGImage(d, r, vgImg, sr.size().toSize(),
QRectF(QPointF(0, 0), sr.size()));
}
} else {
// Monochrome images need to use the vgChildImage() path.
vgImg = toVGImage(image, flags);
drawVGImage(d, r, vgImg, image.size(), sr);
}
vgDestroyImage(vgImg);
}
void QVGPaintEngine::drawImage(const QPointF &pos, const QImage &image)
{
Q_D(QVGPaintEngine);
VGImage vgImg;
if (d->simpleTransform || d->opacity == 1.0f)
vgImg = toVGImage(image);
else
vgImg = toVGImageWithOpacity(image, d->opacity);
drawVGImage(d, pos, vgImg);
vgDestroyImage(vgImg);
}
void QVGPaintEngine::drawTiledPixmap
(const QRectF &r, const QPixmap &pixmap, const QPointF &s)
{
QBrush brush(state()->pen.color(), pixmap);
QTransform xform;
xform.translate(-s.x(), -s.y());
brush.setTransform(xform);
fillRect(r, brush);
}
// Best performance will be achieved with QDrawPixmaps::OpaqueHint
// (i.e. no opacity), no rotation or scaling, and drawing the full
// pixmap rather than parts of the pixmap. Even having just one of
// these conditions will improve performance.
void QVGPaintEngine::drawPixmaps
(const QDrawPixmaps::Data *drawingData, int dataCount,
const QPixmap &pixmap, QFlags<QDrawPixmaps::DrawingHint> hints)
{
#if !defined(QT_SHIVAVG)
Q_D(QVGPaintEngine);
// If the pixmap is not VG, or the transformation is projective,
// then fall back to the default implementation.
QPixmapData *pd = pixmap.pixmapData();
if (!pd)
return; // null QPixmap
if (pd->classId() != QPixmapData::OpenVGClass || !d->simpleTransform) {
QPaintEngineEx::drawPixmaps(drawingData, dataCount, pixmap, hints);
return;
}
// Bail out if nothing to do.
if (dataCount <= 0)
return;
// Bail out if we don't have a usable VGImage for the pixmap.
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
if (!vgpd->isValid())
return;
VGImage vgImg = vgpd->toVGImage();
if (vgImg == VG_INVALID_HANDLE)
return;
// We cache the results of any vgChildImage() calls because the
// same child is very likely to be used over and over in particle
// systems. However, performance is even better if vgChildImage()
// isn't needed at all, so use full source rects where possible.
QVarLengthArray<VGImage> cachedImages;
QVarLengthArray<QRect> cachedSources;
// Select the opacity paint object.
if ((hints & QDrawPixmaps::OpaqueHint) != 0 && d->opacity == 1.0f) {
d->setImageMode(VG_DRAW_IMAGE_NORMAL);
} else {
hints = 0;
if (d->fillPaint != d->opacityPaint) {
vgSetPaint(d->opacityPaint, VG_FILL_PATH);
d->fillPaint = d->opacityPaint;
}
}
for (int i = 0; i < dataCount; ++i) {
QTransform transform(d->imageTransform);
transform.translate(drawingData[i].point.x(), drawingData[i].point.y());
transform.rotate(drawingData[i].rotation);
VGImage child;
QSize imageSize = vgpd->size();
QRectF sr = drawingData[i].source;
if (sr.topLeft().isNull() && sr.size() == imageSize) {
child = vgImg;
} else {
// Look for a previous child with the same source rectangle
// to avoid constantly calling vgChildImage()/vgDestroyImage().
QRect src = sr.toRect();
int j;
for (j = 0; j < cachedSources.size(); ++j) {
if (cachedSources[j] == src)
break;
}
if (j < cachedSources.size()) {
child = cachedImages[j];
} else {
child = vgChildImage
(vgImg, src.x(), src.y(), src.width(), src.height());
cachedImages.append(child);
cachedSources.append(src);
}
}
VGfloat scaleX = drawingData[i].scaleX;
VGfloat scaleY = drawingData[i].scaleY;
transform.translate(-0.5 * scaleX * sr.width(),
-0.5 * scaleY * sr.height());
transform.scale(scaleX, scaleY);
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
if ((hints & QDrawPixmaps::OpaqueHint) == 0) {
qreal opacity = d->opacity * drawingData[i].opacity;
if (opacity != 1.0f) {
if (d->paintOpacity != opacity) {
VGfloat values[4];
values[0] = 1.0f;
values[1] = 1.0f;
values[2] = 1.0f;
values[3] = opacity;
d->paintOpacity = opacity;
vgSetParameterfv
(d->opacityPaint, VG_PAINT_COLOR, 4, values);
}
d->setImageMode(VG_DRAW_IMAGE_MULTIPLY);
} else {
d->setImageMode(VG_DRAW_IMAGE_NORMAL);
}
}
vgDrawImage(child);
}
// Destroy the cached child sub-images.
for (int i = 0; i < cachedImages.size(); ++i)
vgDestroyImage(cachedImages[i]);
#else
QPaintEngineEx::drawPixmaps(drawingData, dataCount, pixmap, hints);
#endif
}
QVGFontEngineCleaner::QVGFontEngineCleaner(QVGPaintEnginePrivate *d)
: QObject(), d_ptr(d)
{
}
QVGFontEngineCleaner::~QVGFontEngineCleaner()
{
}
void QVGFontEngineCleaner::fontEngineDestroyed()
{
#if !defined(QVG_NO_DRAW_GLYPHS)
QFontEngine *engine = static_cast<QFontEngine *>(sender());
QVGFontCache::Iterator it = d_ptr->fontCache.find(engine);
if (it != d_ptr->fontCache.end()) {
delete it.value();
d_ptr->fontCache.erase(it);
}
#endif
}
#if !defined(QVG_NO_DRAW_GLYPHS)
QVGFontGlyphCache::QVGFontGlyphCache()
{
font = vgCreateFont(0);
scaleX = scaleY = 0.0;
memset(cachedGlyphsMask, 0, sizeof(cachedGlyphsMask));
}
QVGFontGlyphCache::~QVGFontGlyphCache()
{
if (font != VG_INVALID_HANDLE)
vgDestroyFont(font);
}
void QVGFontGlyphCache::setScaleFromText(const QTextItemInt &ti)
{
QFontInfo fi(ti.font());
qreal pixelSize = fi.pixelSize();
qreal emSquare = ti.fontEngine->properties().emSquare.toReal();
scaleX = scaleY = static_cast<VGfloat>(pixelSize / emSquare);
}
void QVGFontGlyphCache::cacheGlyphs
(QVGPaintEnginePrivate *d, const QTextItemInt &ti,
const QVarLengthArray<glyph_t> &glyphs)
{
VGfloat origin[2];
VGfloat escapement[2];
const glyph_t *g = glyphs.constData();
int count = glyphs.size();
glyph_metrics_t metrics;
// Some Qt font engines don't set yoff in getUnscaledGlyph().
// Zero the metric structure so that everything has a default value.
memset(&metrics, 0, sizeof(metrics));
while (count-- > 0) {
// Skip this glyph if we have already cached it before.
glyph_t glyph = *g++;
if (glyph < 256) {
if ((cachedGlyphsMask[glyph / 32] & (1 << (glyph % 32))) != 0)
continue;
cachedGlyphsMask[glyph / 32] |= (1 << (glyph % 32));
} else if (cachedGlyphs.contains(glyph)) {
continue;
} else {
cachedGlyphs.insert(glyph);
}
#if !defined(QVG_NO_IMAGE_GLYPHS)
Q_UNUSED(d);
QImage scaledImage = ti.fontEngine->alphaMapForGlyph(glyph);
VGImage vgImage = VG_INVALID_HANDLE;
metrics = ti.fontEngine->boundingBox(glyph);
if (!scaledImage.isNull()) { // Not a space character
if (scaledImage.format() == QImage::Format_Indexed8) {
vgImage = vgCreateImage(VG_A_8, scaledImage.width(), scaledImage.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData(vgImage, qt_vg_imageBits(scaledImage), scaledImage.bytesPerLine(), VG_A_8, 0, 0, scaledImage.width(), scaledImage.height());
} else if (scaledImage.format() == QImage::Format_Mono) {
QImage img = scaledImage.convertToFormat(QImage::Format_Indexed8);
vgImage = vgCreateImage(VG_A_8, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData(vgImage, qt_vg_imageBits(img), img.bytesPerLine(), VG_A_8, 0, 0, img.width(), img.height());
} else {
QImage img = scaledImage.convertToFormat(QImage::Format_ARGB32_Premultiplied);
vgImage = vgCreateImage(VG_sARGB_8888_PRE, img.width(), img.height(), VG_IMAGE_QUALITY_FASTER);
vgImageSubData(vgImage, qt_vg_imageBits(img), img.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0, img.width(), img.height());
}
}
origin[0] = -metrics.x.toReal() + 0.5f;
origin[1] = -metrics.y.toReal() + 0.5f;
escapement[0] = metrics.xoff.toReal();
escapement[1] = metrics.yoff.toReal();
vgSetGlyphToImage(font, glyph, vgImage, origin, escapement);
vgDestroyImage(vgImage); // Reduce reference count.
#else
// Calculate the path for the glyph and cache it.
QPainterPath path;
ti.fontEngine->getUnscaledGlyph(glyph, &path, &metrics);
VGPath vgPath;
if (!path.isEmpty()) {
vgPath = d->painterPathToVGPath(path);
} else {
// Probably a "space" character with no visible outline.
vgPath = VG_INVALID_HANDLE;
}
origin[0] = 0;
origin[1] = 0;
escapement[0] = metrics.xoff.toReal();
escapement[1] = metrics.yoff.toReal();
vgSetGlyphToPath(font, glyph, vgPath, VG_FALSE, origin, escapement);
vgDestroyPath(vgPath); // Reduce reference count.
#endif // !defined(QVG_NO_IMAGE_GLYPHS)
}
}
#endif // !defined(QVG_NO_DRAW_GLYPHS)
void QVGPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
{
#if !defined(QVG_NO_DRAW_GLYPHS)
Q_D(QVGPaintEngine);
const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
// If we are not using a simple transform, then fall back
// to the default Qt path stroking algorithm.
if (!d->simpleTransform) {
QPaintEngineEx::drawTextItem(p, textItem);
return;
}
// Get the glyphs and positions associated with the text item.
QVarLengthArray<QFixedPoint> positions;
QVarLengthArray<glyph_t> glyphs;
QTransform matrix = d->transform;
matrix.translate(p.x(), p.y());
ti.fontEngine->getGlyphPositions
(ti.glyphs, matrix, ti.flags, glyphs, positions);
// Find the glyph cache for this font.
QVGFontCache::ConstIterator it = d->fontCache.constFind(ti.fontEngine);
QVGFontGlyphCache *glyphCache;
if (it != d->fontCache.constEnd()) {
glyphCache = it.value();
} else {
glyphCache = new QVGFontGlyphCache();
if (glyphCache->font == VG_INVALID_HANDLE) {
qWarning("QVGPaintEngine::drawTextItem: OpenVG fonts are not supported by the OpenVG engine");
delete glyphCache;
QPaintEngineEx::drawTextItem(p, textItem);
return;
}
glyphCache->setScaleFromText(ti);
d->fontCache.insert(ti.fontEngine, glyphCache);
if (!d->fontEngineCleaner)
d->fontEngineCleaner = new QVGFontEngineCleaner(d);
QObject::connect(ti.fontEngine, SIGNAL(destroyed()),
d->fontEngineCleaner, SLOT(fontEngineDestroyed()));
}
// Set the transformation to use for drawing the current glyphs.
QTransform glyphTransform(d->glyphTransform);
glyphTransform.translate(p.x(), p.y());
#if defined(QVG_NO_IMAGE_GLYPHS)
glyphTransform.scale(glyphCache->scaleX, glyphCache->scaleY);
#endif
d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, glyphTransform);
// Add the glyphs from the text item into the glyph cache.
glyphCache->cacheGlyphs(d, ti, glyphs);
// Set the glyph drawing origin.
VGfloat origin[2];
origin[0] = 0;
origin[1] = 0;
vgSetfv(VG_GLYPH_ORIGIN, 2, origin);
// Fast anti-aliasing for paths, better for images.
#if !defined(QVG_NO_IMAGE_GLYPHS)
d->setImageQuality(VG_IMAGE_QUALITY_BETTER);
d->setImageMode(VG_DRAW_IMAGE_STENCIL);
#else
d->setRenderingQuality(VG_RENDERING_QUALITY_FASTER);
#endif
// Draw the glyphs. We need to fill with the brush associated with
// the Qt pen, not the Qt brush.
d->ensureBrush(state()->pen.brush());
vgDrawGlyphs(glyphCache->font, glyphs.size(), (VGuint*)glyphs.data(),
NULL, NULL, VG_FILL_PATH, VG_TRUE);
#else
// OpenGL 1.0 does not have support for VGFont and glyphs,
// so fall back to the default Qt path stroking algorithm.
QPaintEngineEx::drawTextItem(p, textItem);
#endif
}
void QVGPaintEngine::setState(QPainterState *s)
{
Q_D(QVGPaintEngine);
QPaintEngineEx::setState(s);
QVGPainterState *ps = static_cast<QVGPainterState *>(s);
if (ps->isNew) {
// Newly created state object. The call to setState()
// will either be followed by a call to begin(), or we are
// setting the state as part of a save().
ps->isNew = false;
} else {
// This state object was set as part of a restore().
restoreState(d->dirty);
d->dirty = ps->savedDirty;
}
}
void QVGPaintEngine::beginNativePainting()
{
Q_D(QVGPaintEngine);
// About to enter raw VG mode: flush pending changes and make
// sure that all matrices are set to the current transformation.
QVGPainterState *s = this->state();
d->ensurePen(s->pen);
d->ensureBrush(s->brush);
d->ensurePathTransform();
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, d->imageTransform);
#if !defined(QVG_NO_DRAW_GLYPHS)
d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, d->pathTransform);
#endif
d->rawVG = true;
}
void QVGPaintEngine::endNativePainting()
{
Q_D(QVGPaintEngine);
// Exiting raw VG mode: force all state values to be
// explicitly set on the VG engine to undo any changes
// that were made by the raw VG function calls.
QPaintEngine::DirtyFlags dirty = d->dirty;
d->clearModes();
d->forcePenChange = true;
d->forceBrushChange = true;
d->penType = (VGPaintType)0;
d->brushType = (VGPaintType)0;
d->clearColor = QColor();
d->fillPaint = d->brushPaint;
d->scissorDirty = true;
restoreState(QPaintEngine::AllDirty);
d->dirty = dirty;
d->rawVG = false;
vgSetPaint(d->penPaint, VG_STROKE_PATH);
vgSetPaint(d->brushPaint, VG_FILL_PATH);
}
QPixmapFilter *QVGPaintEngine::pixmapFilter(int type, const QPixmapFilter *prototype)
{
#if !defined(QT_SHIVAVG)
Q_D(QVGPaintEngine);
switch (type) {
case QPixmapFilter::ConvolutionFilter:
if (!d->convolutionFilter)
d->convolutionFilter.reset(new QVGPixmapConvolutionFilter);
return d->convolutionFilter.data();
case QPixmapFilter::ColorizeFilter:
if (!d->colorizeFilter)
d->colorizeFilter.reset(new QVGPixmapColorizeFilter);
return d->colorizeFilter.data();
case QPixmapFilter::DropShadowFilter:
if (!d->dropShadowFilter)
d->dropShadowFilter.reset(new QVGPixmapDropShadowFilter);
return d->dropShadowFilter.data();
case QPixmapFilter::BlurFilter:
if (!d->blurFilter)
d->blurFilter.reset(new QVGPixmapBlurFilter);
return d->blurFilter.data();
default: break;
}
#endif
return QPaintEngineEx::pixmapFilter(type, prototype);
}
void QVGPaintEngine::restoreState(QPaintEngine::DirtyFlags dirty)
{
Q_D(QVGPaintEngine);
// Restore the pen, brush, and other settings.
if ((dirty & QPaintEngine::DirtyBrushOrigin) != 0)
brushOriginChanged();
d->fillRule = 0;
if ((dirty & QPaintEngine::DirtyOpacity) != 0)
opacityChanged();
if ((dirty & QPaintEngine::DirtyTransform) != 0)
transformChanged();
if ((dirty & QPaintEngine::DirtyCompositionMode) != 0)
compositionModeChanged();
if ((dirty & QPaintEngine::DirtyHints) != 0)
renderHintsChanged();
if ((dirty & (QPaintEngine::DirtyClipRegion |
QPaintEngine::DirtyClipPath |
QPaintEngine::DirtyClipEnabled)) != 0) {
d->maskValid = false;
d->maskIsSet = false;
d->scissorMask = false;
d->maskRect = QRect();
clipEnabledChanged();
}
#if defined(QVG_SCISSOR_CLIP)
if ((dirty & (QPaintEngine::DirtyClipRegion |
QPaintEngine::DirtyClipPath |
QPaintEngine::DirtyClipEnabled)) == 0) {
updateScissor();
}
#else
updateScissor();
#endif
}
void QVGPaintEngine::fillRegion
(const QRegion& region, const QColor& color, const QSize& surfaceSize)
{
Q_D(QVGPaintEngine);
if (d->clearColor != color || d->clearOpacity != 1.0f) {
VGfloat values[4];
values[0] = color.redF();
values[1] = color.greenF();
values[2] = color.blueF();
values[3] = color.alphaF();
vgSetfv(VG_CLEAR_COLOR, 4, values);
d->clearColor = color;
d->clearOpacity = 1.0f;
}
if (region.rectCount() == 1) {
QRect r = region.boundingRect();
vgClear(r.x(), surfaceSize.height() - r.y() - r.height(),
r.width(), r.height());
} else {
const QVector<QRect> rects = region.rects();
for (int i = 0; i < rects.size(); ++i) {
QRect r = rects.at(i);
vgClear(r.x(), surfaceSize.height() - r.y() - r.height(),
r.width(), r.height());
}
}
}
#if !defined(QVG_NO_SINGLE_CONTEXT) && !defined(QT_NO_EGL)
QVGCompositionHelper::QVGCompositionHelper()
{
d = qt_vg_create_paint_engine()->vgPrivate();
}
QVGCompositionHelper::~QVGCompositionHelper()
{
}
void QVGCompositionHelper::startCompositing(const QSize& screenSize)
{
this->screenSize = screenSize;
clearScissor();
d->setBlendMode(VG_BLEND_SRC_OVER);
}
void QVGCompositionHelper::endCompositing()
{
clearScissor();
}
void QVGCompositionHelper::blitWindow
(VGImage image, const QSize& imageSize,
const QRect& rect, const QPoint& topLeft, int opacity)
{
if (image == VG_INVALID_HANDLE)
return;
// Determine which sub rectangle of the window to draw.
QRect sr = rect.translated(-topLeft);
if (opacity >= 255) {
// Fully opaque: use vgSetPixels() to directly copy the sub-region.
int y = screenSize.height() - (rect.bottom() + 1);
vgSetPixels(rect.x(), y, image, sr.x(),
imageSize.height() - (sr.y() + sr.height()),
sr.width(), sr.height());
} else {
// Extract the child image that we want to draw.
VGImage child;
if (sr.topLeft().isNull() && sr.size() == imageSize)
child = image;
else {
child = vgChildImage
(image, sr.x(), imageSize.height() - (sr.y() + sr.height()),
sr.width(), sr.height());
}
// Set the image transform.
QTransform transform;
int y = screenSize.height() - (rect.bottom() + 1);
transform.translate(rect.x() - 0.5f, y - 0.5f);
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
// Enable opacity for image drawing if necessary.
if (opacity != d->paintOpacity) {
VGfloat values[4];
values[0] = 1.0f;
values[1] = 1.0f;
values[2] = 1.0f;
values[3] = ((VGfloat)opacity) / 255.0f;
vgSetParameterfv(d->opacityPaint, VG_PAINT_COLOR, 4, values);
d->paintOpacity = values[3];
}
if (d->fillPaint != d->opacityPaint) {
vgSetPaint(d->opacityPaint, VG_FILL_PATH);
d->fillPaint = d->opacityPaint;
}
d->setImageMode(VG_DRAW_IMAGE_MULTIPLY);
// Draw the child image.
vgDrawImage(child);
// Destroy the child image.
if(child != image)
vgDestroyImage(child);
}
}
static void fillBackgroundRect(const QRect& rect, QVGPaintEnginePrivate *d)
{
VGfloat coords[8];
coords[0] = rect.x();
coords[1] = rect.y();
coords[2] = rect.x() + rect.width();
coords[3] = coords[1];
coords[4] = coords[2];
coords[5] = rect.y() + rect.height();
coords[6] = coords[0];
coords[7] = coords[5];
#if !defined(QVG_NO_MODIFY_PATH)
vgModifyPathCoords(d->rectPath, 0, 4, coords);
vgDrawPath(d->rectPath, VG_FILL_PATH);
#else
Q_UNUSED(d);
VGPath rectPath = vgCreatePath
(VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, // scale
0.0f, // bias
5, // segmentCapacityHint
8, // coordCapacityHint
VG_PATH_CAPABILITY_ALL);
static VGubyte const segments[5] = {
VG_MOVE_TO_ABS,
VG_LINE_TO_ABS,
VG_LINE_TO_ABS,
VG_LINE_TO_ABS,
VG_CLOSE_PATH
};
vgAppendPathData(rectPath, 5, segments, coords);
vgDrawPath(rectPath, VG_FILL_PATH);
vgDestroyPath(rectPath);
#endif
}
void QVGCompositionHelper::fillBackground
(const QRegion& region, const QBrush& brush)
{
if (brush.style() == Qt::SolidPattern) {
// Use vgClear() to quickly fill the background.
QColor color = brush.color();
if (d->clearColor != color || d->clearOpacity != 1.0f) {
VGfloat values[4];
values[0] = color.redF();
values[1] = color.greenF();
values[2] = color.blueF();
values[3] = color.alphaF();
vgSetfv(VG_CLEAR_COLOR, 4, values);
d->clearColor = color;
d->clearOpacity = 1.0f;
}
if (region.rectCount() == 1) {
QRect r = region.boundingRect();
vgClear(r.x(), screenSize.height() - r.y() - r.height(),
r.width(), r.height());
} else {
const QVector<QRect> rects = region.rects();
for (int i = 0; i < rects.size(); ++i) {
QRect r = rects.at(i);
vgClear(r.x(), screenSize.height() - r.y() - r.height(),
r.width(), r.height());
}
}
} else {
// Set the path transform to the default viewport transformation.
VGfloat devh = screenSize.height();
QTransform viewport(1.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, devh, 1.0f);
d->setTransform(VG_MATRIX_PATH_USER_TO_SURFACE, viewport);
// Set the brush to use to fill the background.
d->ensureBrush(brush);
d->setFillRule(VG_EVEN_ODD);
if (region.rectCount() == 1) {
fillBackgroundRect(region.boundingRect(), d);
} else {
const QVector<QRect> rects = region.rects();
for (int i = 0; i < rects.size(); ++i)
fillBackgroundRect(rects.at(i), d);
}
// We will need to reset the path transform during the next paint.
d->pathTransformSet = false;
}
}
void QVGCompositionHelper::drawCursorPixmap
(const QPixmap& pixmap, const QPoint& offset)
{
VGImage vgImage = VG_INVALID_HANDLE;
// Fetch the VGImage from the pixmap if possible.
QPixmapData *pd = pixmap.pixmapData();
if (!pd)
return; // null QPixmap
if (pd->classId() == QPixmapData::OpenVGClass) {
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
if (vgpd->isValid())
vgImage = vgpd->toVGImage();
}
// Set the image transformation and modes.
VGfloat devh = screenSize.height();
QTransform transform(1.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, devh, 1.0f);
transform.translate(offset.x(), offset.y());
d->setTransform(VG_MATRIX_IMAGE_USER_TO_SURFACE, transform);
d->setImageMode(VG_DRAW_IMAGE_NORMAL);
// Draw the VGImage.
if (vgImage != VG_INVALID_HANDLE) {
vgDrawImage(vgImage);
} else {
QImage img = pixmap.toImage().convertToFormat
(QImage::Format_ARGB32_Premultiplied);
vgImage = vgCreateImage
(VG_sARGB_8888_PRE, img.width(), img.height(),
VG_IMAGE_QUALITY_FASTER);
if (vgImage == VG_INVALID_HANDLE)
return;
vgImageSubData
(vgImage, qt_vg_imageBits(img) + img.bytesPerLine() * (img.height() - 1),
-(img.bytesPerLine()), VG_sARGB_8888_PRE, 0, 0,
img.width(), img.height());
vgDrawImage(vgImage);
vgDestroyImage(vgImage);
}
}
void QVGCompositionHelper::setScissor(const QRegion& region)
{
QVector<QRect> rects = region.rects();
int count = rects.count();
if (count > d->maxScissorRects)
count = d->maxScissorRects;
QVarLengthArray<VGint> params(count * 4);
int height = screenSize.height();
for (int i = 0; i < count; ++i) {
params[i * 4 + 0] = rects[i].x();
params[i * 4 + 1] = height - rects[i].y() - rects[i].height();
params[i * 4 + 2] = rects[i].width();
params[i * 4 + 3] = rects[i].height();
}
vgSetiv(VG_SCISSOR_RECTS, count * 4, params.data());
vgSeti(VG_SCISSORING, VG_TRUE);
d->scissorDirty = false;
d->scissorActive = true;
d->scissorRegion = region;
}
void QVGCompositionHelper::clearScissor()
{
if (d->scissorActive || d->scissorDirty) {
vgSeti(VG_SCISSORING, VG_FALSE);
d->scissorActive = false;
d->scissorDirty = false;
}
}
#endif // !QVG_NO_SINGLE_CONTEXT && !QT_NO_EGL
VGImageFormat qt_vg_image_to_vg_format(QImage::Format format)
{
switch (format) {
case QImage::Format_MonoLSB:
return VG_BW_1;
case QImage::Format_ARGB32_Premultiplied:
return VG_sARGB_8888_PRE;
case QImage::Format_RGB32:
return VG_sXRGB_8888;
case QImage::Format_ARGB32:
return VG_sARGB_8888;
case QImage::Format_RGB16:
return VG_sRGB_565;
case QImage::Format_ARGB4444_Premultiplied:
return VG_sARGB_4444;
default: break;
}
return VG_sARGB_8888; // XXX
}
QT_END_NAMESPACE
#include "qpaintengine_vg.moc"