Copy code from the holdingarea into the target locations.
Some initial rework of CMakeLists.txt files, but not yet tested.
/*------------------------------------------------------------------------
*
* OpenVG 1.1 Reference Implementation
* -----------------------------------
*
* Copyright (c) 2007 The Khronos Group Inc.
* Portions copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and /or associated documentation files
* (the "Materials "), to deal in the Materials without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Materials,
* and to permit persons to whom the Materials are furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Materials.
*
* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
* THE USE OR OTHER DEALINGS IN THE MATERIALS.
*
*//**
* \file
* \brief Implementation of Paint and pixel pipe functionality.
* \note
*//*-------------------------------------------------------------------*/
#ifndef __RIPIXELPIPE_H
# include "riPixelPipe.h"
#endif
#ifndef __RIRASTERIZER_H
# include "riRasterizer.h"
#endif
#ifndef __SFDYNAMICPIXELPIPE_H
# include "sfDynamicPixelPipe.h"
#endif
#ifndef __SFCOMPILER_H
# include "sfCompiler.h"
#endif
//==============================================================================================
namespace OpenVGRI
{
/*-------------------------------------------------------------------*//*!
* \brief Paint constructor.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
Paint::Paint() :
m_paintType(VG_PAINT_TYPE_COLOR),
m_paintColor(0,0,0,1,Color::sRGBA_PRE),
m_inputPaintColor(0,0,0,1,Color::sRGBA),
m_colorRampSpreadMode(VG_COLOR_RAMP_SPREAD_PAD),
m_colorRampStops(),
m_inputColorRampStops(),
m_colorRampPremultiplied(VG_TRUE),
m_inputLinearGradientPoint0(0,0),
m_inputLinearGradientPoint1(1,0),
m_inputRadialGradientCenter(0,0),
m_inputRadialGradientFocalPoint(0,0),
m_inputRadialGradientRadius(1.0f),
m_linearGradientPoint0(0,0),
m_linearGradientPoint1(1,0),
m_radialGradientCenter(0,0),
m_radialGradientFocalPoint(0,0),
m_radialGradientRadius(1.0f),
m_patternTilingMode(VG_TILE_FILL),
m_pattern(NULL),
m_referenceCount(0),
m_lutFormat((VGImageFormat)-1),
m_gradientStopsChanged(true)
{
Paint::GradientStop gs;
gs.offset = 0.0f;
gs.color.set(0,0,0,1,Color::sRGBA);
m_colorRampStops.push_back(gs); //throws bad_alloc
gs.offset = 1.0f;
gs.color.set(1,1,1,1,Color::sRGBA);
m_colorRampStops.push_back(gs); //throws bad_alloc
}
/*-------------------------------------------------------------------*//*!
* \brief Paint destructor.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
Paint::~Paint()
{
RI_ASSERT(m_referenceCount == 0);
if(m_pattern)
{
m_pattern->removeInUse();
if(!m_pattern->removeReference())
RI_DELETE(m_pattern);
}
}
static Color readStopColor(const Array<Paint::GradientStop>& colorRampStops, int i, VGboolean colorRampPremultiplied)
{
RI_ASSERT(i >= 0 && i < colorRampStops.size());
Color c = colorRampStops[i].color;
RI_ASSERT(c.getInternalFormat() == Color::sRGBA);
if(colorRampPremultiplied)
c.premultiply();
return c;
}
void Paint::setGradientStops(Array<GradientStop>& inputStops, Array<GradientStop>& stops)
{
m_colorRampStops.swap(stops);
m_inputColorRampStops.swap(inputStops);
m_gradientStopsChanged = true;
}
void Paint::setLinearGradient(const Vector2& p0, const Vector2& p1)
{
m_linearGradientPoint0 = p0;
m_linearGradientPoint1 = p1;
}
void Paint::setRadialGradient(const Vector2& c, const Vector2& f, VGfloat r)
{
m_radialGradientCenter = c;
m_radialGradientFocalPoint = f;
m_radialGradientRadius = r;
}
bool Paint::linearDegenerate() const
{
return m_linearGradientPoint0 == m_linearGradientPoint1 ? true : false;
}
bool Paint::radialDegenerate() const
{
return m_radialGradientRadius == 0.0f ? true : false;
}
/**
* \brief Returns either the VG_PAINT_COLOR, or evaluated gradient value when the
* gradient is degenerate.
*/
Color Paint::getSolidColor() const
{
if (m_paintType == VG_PAINT_TYPE_PATTERN)
{
RI_ASSERT(m_pattern == NULL);
return m_paintColor;
}
if (m_paintType == VG_PAINT_TYPE_COLOR)
return m_paintColor;
RI_ASSERT(linearDegenerate() || radialDegenerate());
// Determine the color at the end of the gradient
RIfloat gs, ge;
if (m_colorRampSpreadMode == VG_COLOR_RAMP_SPREAD_PAD)
{
gs = 1.0f - 1/256.0f;
ge = 1.0f;
} else if (m_colorRampSpreadMode == VG_COLOR_RAMP_SPREAD_REPEAT)
{
gs = 0.0f;
ge = 1/256.0f;
} else
{
gs = 1.0f - 1/256.0f;
ge = 1.0f;
}
Color c = integrateColorRamp(gs, ge);
return c * 256.0f;
}
/*-------------------------------------------------------------------*//*!
* \brief Returns the average color within an offset range in the color ramp.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
Color Paint::integrateColorRamp(RIfloat gmin, RIfloat gmax) const
{
RI_ASSERT(gmin <= gmax);
RI_ASSERT(gmin >= 0.0f && gmin <= 1.0f);
RI_ASSERT(gmax >= 0.0f && gmax <= 1.0f);
RI_ASSERT(m_colorRampStops.size() >= 2); //there are at least two stops
Color currC(0,0,0,0,m_colorRampPremultiplied ? Color::sRGBA_PRE : Color::sRGBA);
if(gmin == 1.0f || gmax == 0.0f)
return currC;
int i = 0;
for(; i < m_colorRampStops.size()-1; i++)
{
if(gmin >= m_colorRampStops[i].offset && gmin < m_colorRampStops[i+1].offset)
{
RIfloat s = m_colorRampStops[i].offset;
RIfloat e = m_colorRampStops[i+1].offset;
RI_ASSERT(s < e);
RIfloat g = (gmin - s) / (e - s);
Color sc = readStopColor(m_colorRampStops, i, m_colorRampPremultiplied);
Color ec = readStopColor(m_colorRampStops, i+1, m_colorRampPremultiplied);
Color rc = (1.0f-g) * sc + g * ec;
//subtract the average color from the start of the stop to gmin
Color dc = 0.5f*(gmin - s)*(sc + rc);
currC -= dc;
break;
}
}
for(;i < m_colorRampStops.size()-1; i++)
{
RIfloat s = m_colorRampStops[i].offset;
RIfloat e = m_colorRampStops[i+1].offset;
RI_ASSERT(s <= e);
Color sc = readStopColor(m_colorRampStops, i, m_colorRampPremultiplied);
Color ec = readStopColor(m_colorRampStops, i+1, m_colorRampPremultiplied);
//average of the stop
Color dc = 0.5f*(e-s)*(sc + ec);
currC += dc;
if(gmax >= m_colorRampStops[i].offset && gmax < m_colorRampStops[i+1].offset)
{
RIfloat g = (gmax - s) / (e - s);
Color rc = (1.0f-g) * sc + g * ec;
//subtract the average color from gmax to the end of the stop
dc = 0.5f*(e - gmax)*(rc + ec);
currC -= dc;
break;
}
}
return currC;
}
/**
* \brief Generates gradient color-ramp lookup values.
*
* \param targetFormat Destination or image format to associate LUT with.
* \patam drawImage true if paint is evaluated along drawImage.
*
* \note Must be called prior to rendering, and after the destination
* format is known. The destination format is either destination
* surface format, or the image format in case of image rendering
* operation.
*/
void Paint::generateLUT(PixelPipe& pipe, VGImageFormat preferredFormat)
{
const RIfloat gstep = 1.0f / (GRADIENT_LUT_COUNT);
const RIfloat rcp = (RIfloat)(GRADIENT_LUT_COUNT);
RIfloat gsx;
gsx = 0.0f;
if (!pipe.colorTransformChanged() && !m_gradientStopsChanged && (preferredFormat == m_lutFormat))
return; // Already in correct format
const bool inputPremultiplied = m_colorRampPremultiplied == VG_TRUE ? true : false;
// Colortransform premultiplies color.
const Color::Descriptor srcDesc = Color::formatToDescriptorConst(
inputPremultiplied || pipe.hasColorTransform() ? VG_sRGBA_8888_PRE : VG_sRGBA_8888);
const Color::Descriptor dstDesc = Color::formatToDescriptorConst(preferredFormat);
// Create a pre-calculated LUT.
for (int i = 0; i < GRADIENT_LUT_COUNT; i++)
{
// \todo Open up the integrator and/or use also integers.
Color c = integrateColorRamp(gsx, gsx + gstep);
c *= rcp;
// \todo Changing the mode must be tracked somehow!
if (pipe.getImageMode() != VG_DRAW_IMAGE_MULTIPLY)
pipe.colorTransform(c);
IntegerColor ic = IntegerColor(c);
ic.convertToFrom(dstDesc, srcDesc, false);
m_gradientLUT[i] = ic;
gsx += gstep;
}
m_gradientStopsChanged = false;
m_lutFormat = Color::descriptorToVGImageFormat(dstDesc);
pipe.setColorTransformChanged(false);
RI_ASSERT(m_lutFormat == preferredFormat);
}
/*-------------------------------------------------------------------*//*!
* \brief PixelPipe constructor.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
PixelPipe::PixelPipe() :
m_drawable(NULL),
m_image(NULL),
m_paint(NULL),
m_defaultPaint(),
m_blendMode(VG_BLEND_SRC_OVER),
m_imageMode(VG_DRAW_IMAGE_NORMAL),
m_imageQuality(VG_IMAGE_QUALITY_FASTER),
m_tileFillColor(0,0,0,0,Color::sRGBA),
m_colorTransform(false),
m_colorTransformValues(),
m_iColorTransformValues(),
m_surfaceToPaintMatrix(),
m_surfaceToImageMatrix(),
m_paintToSurfaceMatrix(),
m_maskOperation(VG_SET_MASK),
m_renderToMask(false),
m_colorTransformChanged(true)
{
for(int i=0;i<8;i++)
{
m_colorTransformValues[i] = (i < 4) ? 1.0f : 0.0f;
m_iColorTransformValues[i] = (i < 4) ? (COLOR_TRANSFORM_ONE) : 0;
}
}
/*-------------------------------------------------------------------*//*!
* \brief PixelPipe destructor.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
PixelPipe::~PixelPipe()
{
}
/*-------------------------------------------------------------------*//*!
* \brief Sets the rendering surface.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setDrawable(Drawable* drawable)
{
RI_ASSERT(drawable);
m_drawable = drawable;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets the blend mode.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setBlendMode(VGBlendMode blendMode)
{
RI_ASSERT(blendMode >= VG_BLEND_SRC && blendMode <= VG_BLEND_ADDITIVE);
m_blendMode = blendMode;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets the mask image. NULL disables masking.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setMask(bool masking)
{
m_masking = masking;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets the image to be drawn. NULL disables image drawing.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setImage(Image* image, VGImageMode imageMode)
{
RI_ASSERT(imageMode == VG_DRAW_IMAGE_NORMAL || imageMode == VG_DRAW_IMAGE_MULTIPLY || imageMode == VG_DRAW_IMAGE_STENCIL);
m_image = image;
m_imageMode = imageMode;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets the surface-to-paint matrix.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setSurfaceToPaintMatrix(const Matrix3x3& surfaceToPaintMatrix)
{
m_surfaceToPaintMatrix = surfaceToPaintMatrix;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets the surface-to-image matrix.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setSurfaceToImageMatrix(const Matrix3x3& surfaceToImageMatrix)
{
m_surfaceToImageMatrix = surfaceToImageMatrix;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets image quality.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setImageQuality(VGImageQuality imageQuality)
{
RI_ASSERT(imageQuality == VG_IMAGE_QUALITY_NONANTIALIASED || imageQuality == VG_IMAGE_QUALITY_FASTER || imageQuality == VG_IMAGE_QUALITY_BETTER);
m_imageQuality = imageQuality;
}
/*-------------------------------------------------------------------*//*!
* \brief Sets fill color for VG_TILE_FILL tiling mode (pattern only).
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setTileFillColor(const Color& c)
{
m_tileFillColor = c;
m_tileFillColor.clamp();
}
/*-------------------------------------------------------------------*//*!
* \brief Sets paint.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setPaint(Paint* paint)
{
// \temp Only call this right before filling a polygon.
m_paint = paint;
if(!m_paint)
m_paint = &m_defaultPaint;
if(m_paint->m_pattern)
m_tileFillColor.convert(m_paint->m_pattern->getDescriptor().internalFormat);
}
/*-------------------------------------------------------------------*//*!
* \brief Color transform.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::setColorTransform(bool enable, RIfloat values[8])
{
m_colorTransform = enable;
for(int i=0;i<4;i++)
{
m_colorTransformValues[i] = RI_CLAMP(values[i], -127.0f, 127.0f);
m_colorTransformValues[i+4] = RI_CLAMP(values[i+4], -1.0f, 1.0f);
m_iColorTransformValues[i] = RI_ROUND_TO_INT(m_colorTransformValues[i]*(RIfloat)COLOR_TRANSFORM_ONE);
m_iColorTransformValues[i+4] = RI_ROUND_TO_INT(m_colorTransformValues[i+4]*255.0f);
}
m_colorTransformChanged = true;
}
const Image* PixelPipe::getRenderTargetImage() const
{
if (m_renderToMask)
return m_drawable->getMaskBuffer()->getImage();
return m_drawable->getColorBuffer()->getImage();
}
/**
* \brief Determine an appropriate VGImageFormat to use for lookup tables.
* \todo Should return descriptor instead?
*/
VGImageFormat PixelPipe::getPreferredLUTFormat() const
{
const Image* target = getRenderTargetImage();
const Color::Descriptor& targetDesc = target->getDescriptor();
if (m_renderToMask)
{
RI_ASSERT(!m_image);
if (targetDesc.isNonlinear())
return VG_sRGBA_8888_PRE;
else
return VG_lRGBA_8888_PRE;
}
if (m_image && m_imageMode == VG_DRAW_IMAGE_MULTIPLY)
return VG_sRGBA_8888_PRE; // ?
// Prefer premultiplied formats
// \note Can also generate non-premultiplied if no sampling/other operation and destination
// is in linear format.
// \note Do not use VGImageFormat, because using (s/l)LA88 is possible with
// luminance destination formats.
if (targetDesc.isNonlinear())
return VG_sRGBA_8888_PRE;
else
return VG_lRGBA_8888_PRE;
}
void PixelPipe::prepareSolidFill()
{
if (!(m_drawable && m_paint))
return;
Color c = m_paint->getSolidColor();
//Color c = m_paint->m_paintColor;
if (!m_image || m_imageMode != VG_DRAW_IMAGE_MULTIPLY)
colorTransform(c); // Output will be premultiplied
// Generate internal color
Color::Descriptor blendDesc = getRenderTargetImage()->getDescriptor();
// MULTIPLY uses the color as-is.
if (m_imageMode != VG_DRAW_IMAGE_MULTIPLY) c.convert(blendDesc.internalFormat);
IntegerColor ic = IntegerColor(c);
blendDesc.internalFormat = (Color::InternalFormat)(blendDesc.internalFormat | (Color::PREMULTIPLIED));
if (m_imageMode != VG_DRAW_IMAGE_MULTIPLY) c.convert(blendDesc.internalFormat);
IntegerColor blendColor = IntegerColor(c);
if (m_imageMode == VG_DRAW_IMAGE_STENCIL)
blendColor.asFixedPoint(c); // Enhance the precision a bit
// \todo No need to pack the color if solid fill is not possible
if (!m_renderToMask)
ic.truncateColor(getRenderTargetImage()->getDescriptor());
else
ic.truncateMask(getRenderTargetImage()->getDescriptor());
RIuint32 p = ic.getPackedColor(getRenderTargetImage()->getDescriptor());
m_spanUniforms.solidColor = blendColor; // This must be premultiplied
m_spanUniforms.packedSolidColor = p; // This must be exactly the dst color
}
void PixelPipe::prepareCoverageFill()
{
IntegerColor ic = IntegerColor(255, 255, 255, 255);
RIuint32 p = ic.getPackedColor(m_drawable->getMaskBuffer()->getDescriptor());
m_spanUniforms.solidColor = ic;
m_spanUniforms.packedSolidColor = p;
}
void PixelPipe::prepareLinearGradient()
{
const Matrix3x3& s2p = m_surfaceToPaintMatrix;
Vector2 zero(0,0);
Vector2 p0 = m_paint->m_linearGradientPoint0;
Vector2 p1 = m_paint->m_linearGradientPoint1;
Vector2 delta = p1 - p0;
zero = affineTransform(s2p, zero);
RIfloat d = (delta.x * delta.x) + (delta.y * delta.y);
RIfloat gdx = (s2p[0][0] * delta.x + s2p[1][0] * delta.y) / d;
RIfloat gdy = (s2p[0][1] * delta.x + s2p[1][1] * delta.y) / d;
RIfloat cx = (zero.x-p0.x) * (delta.x);
RIfloat cy = (zero.y-p0.y) * (delta.y);
RIfloat c = (cx + cy) / d;
m_spanUniforms.dgdx = RI_FLOAT_TO_FX(gdx, PixelPipe::GRADIENT_BITS);
m_spanUniforms.dgdy = RI_FLOAT_TO_FX(gdy, PixelPipe::GRADIENT_BITS);
m_spanUniforms.lgc = RI_FLOAT_TO_FX(c + 0.5*(gdx + gdy), PixelPipe::GRADIENT_BITS);
m_spanUniforms.gradientLookup = m_paint->getGradientLUT();
}
void PixelPipe::prepareRadialGradient()
{
const Matrix3x3& s2p = m_surfaceToPaintMatrix;
Vector2 c = m_paint->m_radialGradientCenter;
Vector2 f = m_paint->m_radialGradientFocalPoint;
RGScalar r = m_paint->m_radialGradientRadius;
Vector2 zero(0,0);
Vector2 pzero = affineTransform(s2p, zero);
Vector2 fp = f - c;
RGScalar q = fp.length();
if (q > r)
{
const RIfloat scale = 0.99f;
fp.normalize();
fp *= r * scale;
f = fp + c;
}
RGScalar r1sqr = RI_SQR(r);
RGScalar d = r1sqr - dot(fp, fp);
m_spanUniforms.rdxdx = s2p[0][0];
m_spanUniforms.rdxdy = s2p[0][1];
m_spanUniforms.rdydx = s2p[1][0];
m_spanUniforms.rdydy = s2p[1][1];
m_spanUniforms.rsqrp = r1sqr / RI_SQR(d);
m_spanUniforms.rfxp = fp.x / d;
m_spanUniforms.rfyp = fp.y / d;
m_spanUniforms.rx0 = pzero.x - f.x + 0.5f*(m_spanUniforms.rdxdx + m_spanUniforms.rdxdy);
m_spanUniforms.ry0 = pzero.y - f.y + 0.5f*(m_spanUniforms.rdydy + m_spanUniforms.rdydx);
m_spanUniforms.gradientLookup = m_paint->getGradientLUT();
}
void PixelPipe::preparePattern()
{
// Patterns only support affine transforms
const Matrix3x3& s2p = m_surfaceToPaintMatrix;
const RIfloat patternWidth = (RIfloat)m_paint->m_pattern->getWidth();
const RIfloat patternHeight = (RIfloat)m_paint->m_pattern->getHeight();
const Vector2 zero(0, 0);
Vector2 pzero = affineTransform(s2p, zero);
m_spanUniforms.paint_x0 = RI_ROUND_TO_INT((pzero.x/patternWidth)*(1<<GRADIENT_BITS));
m_spanUniforms.paint_y0 = RI_ROUND_TO_INT((pzero.y/patternHeight)*(1<<GRADIENT_BITS));
m_spanUniforms.paint_dxdx = RI_ROUND_TO_INT((s2p[0][0]/patternWidth)*(1<<GRADIENT_BITS));
m_spanUniforms.paint_dxdy = RI_ROUND_TO_INT((s2p[0][1]/patternHeight)*(1<<GRADIENT_BITS));
m_spanUniforms.paint_dydx = RI_ROUND_TO_INT((s2p[1][0]/patternWidth)*(1<<GRADIENT_BITS));
m_spanUniforms.paint_dydy = RI_ROUND_TO_INT((s2p[1][1]/patternHeight)*(1<<GRADIENT_BITS));
m_spanUniforms.paint_x0 += (m_spanUniforms.paint_dxdx + m_spanUniforms.paint_dxdy) / 2;
m_spanUniforms.paint_y0 += (m_spanUniforms.paint_dydy + m_spanUniforms.paint_dydx) / 2;
m_spanUniforms.patternPtr = m_paint->m_pattern->getData();
m_spanUniforms.patternStride = m_paint->m_pattern->getStride();
m_spanUniforms.paint_width = m_paint->m_pattern->getWidth();
m_spanUniforms.paint_height = m_paint->m_pattern->getHeight();
m_signatureState.patternDesc = m_paint->m_pattern->getDescriptor();
m_spanUniforms.tileFillColor = IntegerColor(m_tileFillColor);
// The tile fill-color must be shifted down to same bit-depth (see integer samplers)
m_spanUniforms.tileFillColor.truncateColor(m_signatureState.patternDesc);
}
RI_INLINE static RIfloat floatEqu(RIfloat a, RIfloat b, RIfloat e)
{
// \note This should be sufficient for our use-cases;
return (RI_ABS(a - b) < e);
}
RI_INLINE static RIfloat distToInt(RIfloat f)
{
const RIfloat intF = RI_ROUND_TO_INT(f);
return RI_ABS(intF - f);
}
/**
* \brief Check if transform is 90 degree rotation, or flip and nothing else.
*/
RI_INLINE static bool orthoNormalCoAxialTransform(const Matrix3x3& t, bool aa)
{
const RIfloat epsilonCoord = 1/255.0f; // 1/127.0f;
const RIfloat epsilonGradient = epsilonCoord * epsilonCoord; // \todo Too strict?
const RIfloat absPatterns[2][4] = {
{1.0f, 0.0f, 0.0f, 1.0f},
{0.0f, 1.0f, 1.0f, 0.0f} };
if (!t.isAffine())
return false;
// \todo This rule only applies if filtering is in use?
if (aa)
if (!floatEqu(distToInt(t[0][2]), 0.0f, epsilonCoord) || !floatEqu(distToInt(t[1][2]), 0.0f, epsilonCoord))
return false;
Matrix3x3 u = t;
for (int j = 0; j < 2; j++)
for (int i = 0; i < 2; i++)
u[j][i] = RI_ABS(u[j][i]);
bool found;
for (int m = 0; m < 2; m++)
{
found = true;
for (int j = 0; j < 2; j++)
{
for (int i = 0; i < 2; i++)
{
//if (u[j][i] != absPatterns[m][i+j*2])
if (!floatEqu(u[j][i], absPatterns[m][i+j*2], epsilonGradient))
{
found = false;
break;
}
}
if (!found) break;
}
if (found) break;
}
return found;
}
void PixelPipe::prepareImage(bool aa)
{
if (!m_image)
{
m_signatureState.imageGradientType = GRADIENT_TYPE_INTEGER;
return;
}
RI_ASSERT(m_image);
m_spanUniforms.imagePtr = m_image->getData();
m_spanUniforms.imageStride = m_image->getStride();
if (m_image->getParent() != NULL)
{
// Adjust the pointer.
int x, y;
m_image->getStorageOffset(x, y);
m_spanUniforms.imagePtr = Image::calculateAddress(
m_spanUniforms.imagePtr, m_image->getDescriptor().bitsPerPixel, x, y, m_spanUniforms.imageStride);
}
// \todo This function writes to derived state also.
// \todo Plenty of fast-paths possible!
const Matrix3x3& s2i = m_surfaceToImageMatrix;
Vector3 zero(0,0,1);
Vector3 pzero;
bool fastImage = orthoNormalCoAxialTransform(s2i, aa);
pzero = s2i * zero;
if (fastImage)
{
RI_ASSERT(pzero.z == 1.0f);
m_spanUniforms.image_idxdx = RI_ROUND_TO_INT(s2i[0][0]);
m_spanUniforms.image_idxdy = RI_ROUND_TO_INT(s2i[0][1]);
m_spanUniforms.image_idydx = RI_ROUND_TO_INT(s2i[1][0]);
m_spanUniforms.image_idydy = RI_ROUND_TO_INT(s2i[1][1]);
m_spanUniforms.image_ix0 = RI_FLOOR(pzero.x + 0.5f*(s2i[0][0]+s2i[0][1]));
m_spanUniforms.image_iy0 = RI_FLOOR(pzero.y + 0.5f*(s2i[1][1]+s2i[1][0]));
// Adjust sample-center when using (exactly) integer coordinates.
#if 0
if (m_spanUniforms.image_idxdx < 0 || m_spanUniforms.image_idxdy < 0)
m_spanUniforms.image_ix0--;
if (m_spanUniforms.image_idydy < 0 || m_spanUniforms.image_idydx < 0)
m_spanUniforms.image_iy0--;
#endif
m_signatureState.imageGradientType = GRADIENT_TYPE_INTEGER;
}
else if (s2i.isAffine())
{
RI_ASSERT(pzero.z == 1.0f);
const RIfloat imageWidth = m_image->getWidth();
const RIfloat imageHeight = m_image->getHeight();
m_spanUniforms.image_idxdx = RI_ROUND_TO_INT((s2i[0][0]/imageWidth)*(1<<GRADIENT_BITS));
m_spanUniforms.image_idxdy = RI_ROUND_TO_INT((s2i[0][1]/imageHeight)*(1<<GRADIENT_BITS));
m_spanUniforms.image_idydx = RI_ROUND_TO_INT((s2i[1][0]/imageWidth)*(1<<GRADIENT_BITS));
m_spanUniforms.image_idydy = RI_ROUND_TO_INT((s2i[1][1]/imageHeight)*(1<<GRADIENT_BITS));
m_spanUniforms.image_ix0 = RI_ROUND_TO_INT((pzero.x/imageWidth)*(1<<GRADIENT_BITS));
m_spanUniforms.image_iy0 = RI_ROUND_TO_INT((pzero.y/imageHeight)*(1<<GRADIENT_BITS));
m_spanUniforms.image_ix0 += (m_spanUniforms.image_idxdx + m_spanUniforms.image_idxdy)/2;
m_spanUniforms.image_iy0 += (m_spanUniforms.image_idydy + m_spanUniforms.image_idydx)/2;
m_spanUniforms.image_iWidth = (RIint32)imageWidth;
m_spanUniforms.image_iHeight = (RIint32)imageHeight;
m_signatureState.imageGradientType = GRADIENT_TYPE_FIXED;
}
else
{
// Use floats.
m_spanUniforms.image_fx0 = pzero.x;
m_spanUniforms.image_fy0 = pzero.y;
m_spanUniforms.image_fw0 = pzero.z;
m_spanUniforms.image_fdxdx = s2i[0][0];
m_spanUniforms.image_fdxdy = s2i[0][1];
m_spanUniforms.image_fdydx = s2i[1][0];
m_spanUniforms.image_fdydy = s2i[1][1];
m_spanUniforms.image_fdwdx = s2i[2][0];
m_spanUniforms.image_fdwdy = s2i[2][1];
m_spanUniforms.image_fx0 += 0.5f * (m_spanUniforms.image_fdxdx + m_spanUniforms.image_fdxdy);
m_spanUniforms.image_fy0 += 0.5f * (m_spanUniforms.image_fdydy + m_spanUniforms.image_fdydx);
m_spanUniforms.image_fw0 += 0.5f * (m_spanUniforms.image_fdwdx + m_spanUniforms.image_fdwdy);
m_spanUniforms.image_fWidth = (RIfloat)m_image->getWidth();
m_spanUniforms.image_fHeight = (RIfloat)m_image->getHeight();
m_signatureState.imageGradientType = GRADIENT_TYPE_FLOAT;
}
m_signatureState.imageDesc = m_image->getDescriptor();
}
static PixelPipe::TilingMode tilingModeOfImageTilingMode(VGTilingMode it)
{
switch(it)
{
case VG_TILE_PAD:
return PixelPipe::TILING_MODE_PAD;
case VG_TILE_REPEAT:
return PixelPipe::TILING_MODE_REPEAT;
case VG_TILE_REFLECT:
return PixelPipe::TILING_MODE_REFLECT;
default:
RI_ASSERT(it == VG_TILE_FILL);
return PixelPipe::TILING_MODE_FILL;
}
}
static PixelPipe::TilingMode tilingModeOfSpreadMode(VGColorRampSpreadMode sm)
{
switch(sm)
{
case VG_COLOR_RAMP_SPREAD_PAD:
return PixelPipe::TILING_MODE_PAD;
case VG_COLOR_RAMP_SPREAD_REPEAT:
return PixelPipe::TILING_MODE_REPEAT;
default:
RI_ASSERT(sm == VG_COLOR_RAMP_SPREAD_REFLECT);
return PixelPipe::TILING_MODE_REFLECT;
}
}
static PixelPipe::TilingMode tilingModeOfPaint(const Paint* paint)
{
switch(paint->m_paintType)
{
case VG_PAINT_TYPE_COLOR:
return PixelPipe::TILING_MODE_PAD;
case VG_PAINT_TYPE_LINEAR_GRADIENT:
case VG_PAINT_TYPE_RADIAL_GRADIENT:
return tilingModeOfSpreadMode(paint->m_colorRampSpreadMode);
default:
RI_ASSERT(paint->m_paintType == VG_PAINT_TYPE_PATTERN);
return tilingModeOfImageTilingMode(paint->m_patternTilingMode);
}
}
void PixelPipe::prepareRenderToMask()
{
RI_ASSERT(m_drawable->getMaskBuffer());
m_signatureState.dstDesc = m_drawable->getMaskBuffer()->getDescriptor();
//RI_ASSERT(m_signatureState.dstFormat >= 0 && m_signatureState.dstFormat <= VG_lABGR_8888_PRE);
m_signatureState.maskOperation = m_maskOperation;
}
void PixelPipe::prepareSignatureState()
{
m_signatureState.isRenderToMask = m_renderToMask;
if (m_signatureState.isRenderToMask)
{
prepareRenderToMask();
return;
}
m_signatureState.blendMode = getBlendMode();
m_signatureState.hasColorTransform = this->m_colorTransform;
m_signatureState.paintType = getPaintType();
m_signatureState.paintTilingMode = tilingModeOfPaint(m_paint);
// \todo Derive these from the quality settings somehow.
// Linear and nearest should work atm.
m_signatureState.paintSampler = SAMPLER_TYPE_NEAREST;
m_signatureState.imageSampler = SAMPLER_TYPE_NEAREST;
m_signatureState.hasMasking = isMasking() && (m_drawable->getMaskBuffer() != NULL);
m_signatureState.hasImage = m_image ? true : false;
m_signatureState.unsafeImageInput = !m_image ? false : m_image->isUnsafe();
m_signatureState.imageMode = m_imageMode;
// Formats. Note that fields that are not filled in / used get set to a derived state in a
// separate function!
if (m_signatureState.paintType == (RIuint32)VG_PAINT_TYPE_COLOR)
{
RI_ASSERT(m_paint);
if (m_paint->getSolidColor().a == 1.0)
m_signatureState.fillColorTransparent = false;
else
m_signatureState.fillColorTransparent = true;
}
m_signatureState.dstDesc = m_drawable->getColorBuffer()->getDescriptor();
// \todo Why isn't the imagedescriptor set here?
if (m_signatureState.hasMasking)
{
m_signatureState.maskDesc = m_drawable->getMaskBuffer()->getDescriptor();
}
}
/**
* \brief Remove redundancy from the pixel-pipeline state so that less
* pipelines are generated.
*/
static void determineDerivedState(PixelPipe::SignatureState& derivedState, const PixelPipe::SignatureState& originalState)
{
derivedState = originalState;
if (derivedState.isRenderToMask)
{
// Set a lot of defaults:
derivedState.blendMode = VG_BLEND_SRC;
derivedState.imageMode = VG_DRAW_IMAGE_NORMAL;
derivedState.paintType = VG_PAINT_TYPE_COLOR;
derivedState.hasImage = false;
derivedState.hasMasking = false;
derivedState.hasColorTransform = false;
}
if (derivedState.paintType == VG_PAINT_TYPE_COLOR)
{
derivedState.paintTilingMode = PixelPipe::TILING_MODE_PAD;
derivedState.paintSampler = PixelPipe::SAMPLER_TYPE_NEAREST;
// \todo Opaque solid colors can benefit from simpler coverage-blending
// becase SRC_OVER == SRC. This information has to be present in
// the derivedState (and not just uniform).
}
if (!derivedState.hasImage)
{
derivedState.imageMode = VG_DRAW_IMAGE_NORMAL;
derivedState.imageSampler = PixelPipe::SAMPLER_TYPE_NEAREST;
derivedState.imageGradientType = PixelPipe::GRADIENT_TYPE_INTEGER;
derivedState.imageDesc = Color::Descriptor::getDummyDescriptor();
} else if (derivedState.imageMode == VG_DRAW_IMAGE_NORMAL)
{
// If paint is not generated, use a common enum
derivedState.paintType = VG_PAINT_TYPE_COLOR;
}
if (derivedState.paintType != VG_PAINT_TYPE_PATTERN)
{
derivedState.patternDesc = Color::Descriptor::getDummyDescriptor();
}
if (!derivedState.isRenderToMask)
derivedState.maskOperation = VG_CLEAR_MASK;
if (!derivedState.hasMasking)
{
derivedState.maskDesc = Color::Descriptor::getDummyDescriptor();
}
}
/**
* \brief Determine per-scanconversion constant state.
* \todo NOTE! This also prepares the derived state at the moment.
*/
void PixelPipe::prepareSpanUniforms(bool aa)
{
prepareSignatureState();
if (m_signatureState.hasColorTransform)
m_spanUniforms.colorTransformValues = m_iColorTransformValues;
RI_ASSERT(m_drawable->getColorBuffer());
const Image* dst;
if (!m_signatureState.isRenderToMask)
dst = m_drawable->getColorBuffer()->getImage();
else
dst = m_drawable->getMaskBuffer()->getImage();
m_spanUniforms.dstPtr = dst->getData();
m_spanUniforms.dstStride = dst->getStride();
if (m_drawable->getMaskBuffer())
{
m_spanUniforms.maskPtr = m_drawable->getMaskBuffer()->m_image->getData();
m_spanUniforms.maskStride = m_drawable->getMaskBuffer()->m_image->getStride();
}
else
{
m_spanUniforms.maskPtr = NULL;
m_spanUniforms.maskStride = 0;
}
if (!m_renderToMask)
{
VGImageFormat prefPaintFormat = getPreferredLUTFormat();
switch (getPaintType())
{
case VG_PAINT_TYPE_COLOR:
prepareSolidFill();
break;
case VG_PAINT_TYPE_LINEAR_GRADIENT:
m_paint->generateLUT(*this, prefPaintFormat);
prepareLinearGradient();
break;
case VG_PAINT_TYPE_RADIAL_GRADIENT:
m_paint->generateLUT(*this, prefPaintFormat);
prepareRadialGradient();
break;
default:
RI_ASSERT(getPaintType() == VG_PAINT_TYPE_PATTERN);
preparePattern();
break;
}
}
else
{
prepareCoverageFill();
}
prepareImage(aa);
// Must be done last:
determineDerivedState(m_derivedState, m_signatureState);
}
/*-------------------------------------------------------------------*//*!
* \brief Computes the linear gradient function at (x,y).
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::linearGradient(RIfloat& g, RIfloat& rho, RIfloat x, RIfloat y) const
{
RI_ASSERT(m_paint);
Vector2 u = m_paint->m_linearGradientPoint1 - m_paint->m_linearGradientPoint0;
RIfloat usq = dot(u,u);
if( usq <= 0.0f )
{ //points are equal, gradient is always 1.0f
g = 1.0f;
rho = 0.0f;
return;
}
RIfloat oou = 1.0f / usq;
Vector2 p(x, y);
p = affineTransform(m_surfaceToPaintMatrix, p);
p -= m_paint->m_linearGradientPoint0;
RI_ASSERT(usq >= 0.0f);
g = dot(p, u) * oou;
RIfloat dgdx = oou * u.x * m_surfaceToPaintMatrix[0][0] + oou * u.y * m_surfaceToPaintMatrix[1][0];
RIfloat dgdy = oou * u.x * m_surfaceToPaintMatrix[0][1] + oou * u.y * m_surfaceToPaintMatrix[1][1];
rho = (RIfloat)sqrt(dgdx*dgdx + dgdy*dgdy);
RI_ASSERT(rho >= 0.0f);
}
/*-------------------------------------------------------------------*//*!
* \brief Computes the radial gradient function at (x,y).
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::radialGradient(RIfloat &g, RIfloat &rho, RIfloat x, RIfloat y) const
{
RI_ASSERT(m_paint);
if( m_paint->m_radialGradientRadius <= 0.0f )
{
g = 1.0f;
rho = 0.0f;
return;
}
RIfloat r = m_paint->m_radialGradientRadius;
Vector2 c = m_paint->m_radialGradientCenter;
Vector2 f = m_paint->m_radialGradientFocalPoint;
Vector2 gx(m_surfaceToPaintMatrix[0][0], m_surfaceToPaintMatrix[1][0]);
Vector2 gy(m_surfaceToPaintMatrix[0][1], m_surfaceToPaintMatrix[1][1]);
Vector2 fp = f - c;
//clamp the focal point inside the gradient circle
RIfloat fpLen = fp.length();
if( fpLen > 0.999f * r )
fp *= 0.999f * r / fpLen;
RIfloat D = -1.0f / (dot(fp,fp) - r*r);
Vector2 p(x, y);
p = affineTransform(m_surfaceToPaintMatrix, p) - c;
Vector2 d = p - fp;
RIfloat s = (RIfloat)sqrt(r*r*dot(d,d) - RI_SQR(p.x*fp.y - p.y*fp.x));
g = (dot(fp,d) + s) * D;
if(RI_ISNAN(g))
g = 0.0f;
RIfloat dgdx = D*dot(fp,gx) + (r*r*dot(d,gx) - (gx.x*fp.y - gx.y*fp.x)*(p.x*fp.y - p.y*fp.x)) * (D / s);
RIfloat dgdy = D*dot(fp,gy) + (r*r*dot(d,gy) - (gy.x*fp.y - gy.y*fp.x)*(p.x*fp.y - p.y*fp.x)) * (D / s);
rho = (RIfloat)sqrt(dgdx*dgdx + dgdy*dgdy);
if(RI_ISNAN(rho))
rho = 0.0f;
RI_ASSERT(rho >= 0.0f);
}
/*-------------------------------------------------------------------*//*!
* \brief Maps a gradient function value to a color.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
Color PixelPipe::colorRamp(RIfloat gradient, RIfloat rho) const
{
RI_ASSERT(m_paint);
RI_ASSERT(rho >= 0.0f);
Color c(0,0,0,0,m_paint->m_colorRampPremultiplied ? Color::sRGBA_PRE : Color::sRGBA);
Color avg;
if(rho == 0.0f)
{ //filter size is zero or gradient is degenerate
switch(m_paint->m_colorRampSpreadMode)
{
case VG_COLOR_RAMP_SPREAD_PAD:
gradient = RI_CLAMP(gradient, 0.0f, 1.0f);
break;
case VG_COLOR_RAMP_SPREAD_REFLECT:
{
RIfloat g = RI_MOD(gradient, 2.0f);
gradient = (g < 1.0f) ? g : 2.0f - g;
break;
}
default:
RI_ASSERT(m_paint->m_colorRampSpreadMode == VG_COLOR_RAMP_SPREAD_REPEAT);
gradient = gradient - (RIfloat)floor(gradient);
break;
}
RI_ASSERT(gradient >= 0.0f && gradient <= 1.0f);
for(int i=0;i<m_paint->m_colorRampStops.size()-1;i++)
{
if(gradient >= m_paint->m_colorRampStops[i].offset && gradient < m_paint->m_colorRampStops[i+1].offset)
{
RIfloat s = m_paint->m_colorRampStops[i].offset;
RIfloat e = m_paint->m_colorRampStops[i+1].offset;
RI_ASSERT(s < e);
RIfloat g = RI_CLAMP((gradient - s) / (e - s), 0.0f, 1.0f); //clamp needed due to numerical inaccuracies
Color sc = readStopColor(m_paint->m_colorRampStops, i, m_paint->m_colorRampPremultiplied);
Color ec = readStopColor(m_paint->m_colorRampStops, i+1, m_paint->m_colorRampPremultiplied);
return (1.0f-g) * sc + g * ec; //return interpolated value
}
}
return readStopColor(m_paint->m_colorRampStops, m_paint->m_colorRampStops.size()-1, m_paint->m_colorRampPremultiplied);
}
RIfloat gmin = gradient - rho*0.5f; //filter starting from the gradient point (if starts earlier, radial gradient center will be an average of the first and the last stop, which doesn't look good)
RIfloat gmax = gradient + rho*0.5f;
switch(m_paint->m_colorRampSpreadMode)
{
case VG_COLOR_RAMP_SPREAD_PAD:
{
if(gmin < 0.0f)
c += (RI_MIN(gmax, 0.0f) - gmin) * readStopColor(m_paint->m_colorRampStops, 0, m_paint->m_colorRampPremultiplied);
if(gmax > 1.0f)
c += (gmax - RI_MAX(gmin, 1.0f)) * readStopColor(m_paint->m_colorRampStops, m_paint->m_colorRampStops.size()-1, m_paint->m_colorRampPremultiplied);
gmin = RI_CLAMP(gmin, 0.0f, 1.0f);
gmax = RI_CLAMP(gmax, 0.0f, 1.0f);
c += m_paint->integrateColorRamp(gmin, gmax);
c *= 1.0f/rho;
c.clamp(); //clamp needed due to numerical inaccuracies
return c;
}
case VG_COLOR_RAMP_SPREAD_REFLECT:
{
avg = m_paint->integrateColorRamp(0.0f, 1.0f);
RIfloat gmini = (RIfloat)floor(gmin);
RIfloat gmaxi = (RIfloat)floor(gmax);
c = (gmaxi + 1.0f - gmini) * avg; //full ramps
//subtract beginning
if(((int)gmini) & 1)
c -= m_paint->integrateColorRamp(RI_CLAMP(1.0f - (gmin - gmini), 0.0f, 1.0f), 1.0f);
else
c -= m_paint->integrateColorRamp(0.0f, RI_CLAMP(gmin - gmini, 0.0f, 1.0f));
//subtract end
if(((int)gmaxi) & 1)
c -= m_paint->integrateColorRamp(0.0f, RI_CLAMP(1.0f - (gmax - gmaxi), 0.0f, 1.0f));
else
c -= m_paint->integrateColorRamp(RI_CLAMP(gmax - gmaxi, 0.0f, 1.0f), 1.0f);
break;
}
default:
{
RI_ASSERT(m_paint->m_colorRampSpreadMode == VG_COLOR_RAMP_SPREAD_REPEAT);
avg = m_paint->integrateColorRamp(0.0f, 1.0f);
RIfloat gmini = (RIfloat)floor(gmin);
RIfloat gmaxi = (RIfloat)floor(gmax);
c = (gmaxi + 1.0f - gmini) * avg; //full ramps
c -= m_paint->integrateColorRamp(0.0f, RI_CLAMP(gmin - gmini, 0.0f, 1.0f)); //subtract beginning
c -= m_paint->integrateColorRamp(RI_CLAMP(gmax - gmaxi, 0.0f, 1.0f), 1.0f); //subtract end
break;
}
}
//divide color by the length of the range
c *= 1.0f / rho;
c.clamp(); //clamp needed due to numerical inaccuracies
//hide aliasing by fading to the average color
const RIfloat fadeStart = 0.5f;
const RIfloat fadeMultiplier = 2.0f; //the larger, the earlier fade to average is done
if(rho < fadeStart)
return c;
RIfloat ratio = RI_MIN((rho - fadeStart) * fadeMultiplier, 1.0f);
return ratio * avg + (1.0f - ratio) * c;
}
/*-------------------------------------------------------------------*//*!
* \brief Computes blend.
* \param
* \return
* \note premultiplied blending formulas
//src
a = asrc
r = rsrc
//src over
a = asrc + adst * (1-asrc)
r = rsrc + rdst * (1-asrc)
//dst over
a = asrc * (1-adst) + adst
r = rsrc * (1-adst) + adst
//src in
a = asrc * adst
r = rsrc * adst
//dst in
a = adst * asrc
r = rdst * asrc
//multiply
a = asrc + adst * (1-asrc)
r = rsrc * (1-adst) + rdst * (1-asrc) + rsrc * rdst
//screen
a = asrc + adst * (1-asrc)
r = rsrc + rdst - rsrc * rdst
//darken
a = asrc + adst * (1-asrc)
r = MIN(rsrc + rdst * (1-asrc), rdst + rsrc * (1-adst))
//lighten
a = asrc + adst * (1-asrc)
r = MAX(rsrc + rdst * (1-asrc), rdst + rsrc * (1-adst))
//additive
a = MIN(asrc+adst,1)
r = rsrc + rdst
*//*-------------------------------------------------------------------*/
Color PixelPipe::blend(const Color& s, RIfloat ar, RIfloat ag, RIfloat ab, const Color& d, VGBlendMode blendMode) const
{
//apply blending in the premultiplied format
Color r(0,0,0,0,d.getInternalFormat());
RI_ASSERT(s.a >= 0.0f && s.a <= 1.0f);
RI_ASSERT(s.r >= 0.0f && s.r <= s.a && s.r <= ar);
RI_ASSERT(s.g >= 0.0f && s.g <= s.a && s.g <= ag);
RI_ASSERT(s.b >= 0.0f && s.b <= s.a && s.b <= ab);
RI_ASSERT(d.a >= 0.0f && d.a <= 1.0f);
RI_ASSERT(d.r >= 0.0f && d.r <= d.a);
RI_ASSERT(d.g >= 0.0f && d.g <= d.a);
RI_ASSERT(d.b >= 0.0f && d.b <= d.a);
switch(blendMode)
{
case VG_BLEND_SRC:
r = s;
break;
case VG_BLEND_SRC_OVER:
r.r = s.r + d.r * (1.0f - ar);
r.g = s.g + d.g * (1.0f - ag);
r.b = s.b + d.b * (1.0f - ab);
r.a = s.a + d.a * (1.0f - s.a);
break;
case VG_BLEND_DST_OVER:
r.r = s.r * (1.0f - d.a) + d.r;
r.g = s.g * (1.0f - d.a) + d.g;
r.b = s.b * (1.0f - d.a) + d.b;
r.a = s.a * (1.0f - d.a) + d.a;
break;
case VG_BLEND_SRC_IN:
r.r = s.r * d.a;
r.g = s.g * d.a;
r.b = s.b * d.a;
r.a = s.a * d.a;
break;
case VG_BLEND_DST_IN:
r.r = d.r * ar;
r.g = d.g * ag;
r.b = d.b * ab;
r.a = d.a * s.a;
break;
case VG_BLEND_MULTIPLY:
r.r = s.r * (1.0f - d.a + d.r) + d.r * (1.0f - ar);
r.g = s.g * (1.0f - d.a + d.g) + d.g * (1.0f - ag);
r.b = s.b * (1.0f - d.a + d.b) + d.b * (1.0f - ab);
r.a = s.a + d.a * (1.0f - s.a);
break;
case VG_BLEND_SCREEN:
r.r = s.r + d.r * (1.0f - s.r);
r.g = s.g + d.g * (1.0f - s.g);
r.b = s.b + d.b * (1.0f - s.b);
r.a = s.a + d.a * (1.0f - s.a);
break;
case VG_BLEND_DARKEN:
r.r = RI_MIN(s.r + d.r * (1.0f - ar), d.r + s.r * (1.0f - d.a));
r.g = RI_MIN(s.g + d.g * (1.0f - ag), d.g + s.g * (1.0f - d.a));
r.b = RI_MIN(s.b + d.b * (1.0f - ab), d.b + s.b * (1.0f - d.a));
r.a = s.a + d.a * (1.0f - s.a);
break;
case VG_BLEND_LIGHTEN:
r.r = RI_MAX(s.r + d.r * (1.0f - ar), d.r + s.r * (1.0f - d.a));
r.g = RI_MAX(s.g + d.g * (1.0f - ag), d.g + s.g * (1.0f - d.a));
r.b = RI_MAX(s.b + d.b * (1.0f - ab), d.b + s.b * (1.0f - d.a));
//although the statement below is equivalent to r.a = s.a + d.a * (1.0f - s.a)
//in practice there can be a very slight difference because
//of the max operation in the blending formula that may cause color to exceed alpha.
//Because of this, we compute the result both ways and return the maximum.
r.a = RI_MAX(s.a + d.a * (1.0f - s.a), d.a + s.a * (1.0f - d.a));
break;
default:
RI_ASSERT(blendMode == VG_BLEND_ADDITIVE);
r.r = RI_MIN(s.r + d.r, 1.0f);
r.g = RI_MIN(s.g + d.g, 1.0f);
r.b = RI_MIN(s.b + d.b, 1.0f);
r.a = RI_MIN(s.a + d.a, 1.0f);
break;
}
return r;
}
/*-------------------------------------------------------------------*//*!
* \brief Applies color transform.
* \param
* \return
* \note
*//*-------------------------------------------------------------------*/
void PixelPipe::colorTransform(Color& c) const
{
if(m_colorTransform)
{
c.unpremultiply();
c.luminanceToRGB();
c.r = c.r * m_colorTransformValues[0] + m_colorTransformValues[4];
c.g = c.g * m_colorTransformValues[1] + m_colorTransformValues[5];
c.b = c.b * m_colorTransformValues[2] + m_colorTransformValues[6];
c.a = c.a * m_colorTransformValues[3] + m_colorTransformValues[7];
c.clamp();
c.premultiply();
}
}
void PixelPipe::fillSpans(PPVariants& variants, const Span* spans, int nSpans) const
{
#if 1
PPCompiler& compiler = PPCompiler::getCompiler();
PPCompiler::PixelPipeHandle handle = compiler.compilePixelPipeline(m_derivedState);
if (handle)
{
PixelPipeFunction func = compiler.getPixelPipePtr(handle);
RI_ASSERT(func);
func(m_spanUniforms, variants, spans, nSpans);
compiler.releasePixelPipeline(handle);
} else
#endif
{
executePixelPipeline(m_derivedState, m_spanUniforms, variants, spans, nSpans);
}
}
//=======================================================================
} //namespace OpenVGRI