--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/painting/qrasterdefs_p.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,1280 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** 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
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/***************************************************************************/
+/* */
+/* ftimage.h */
+/* */
+/* FreeType glyph image formats and default raster interface */
+/* (specification). */
+/* */
+/* Copyright 1996-2001, 2002, 2003, 2004 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+ /*************************************************************************/
+ /* */
+ /* Note: A `raster' is simply a scan-line converter, used to render */
+ /* QT_FT_Outlines into QT_FT_Bitmaps. */
+ /* */
+ /*************************************************************************/
+
+
+#ifndef __QT_FTIMAGE_H__
+#define __QT_FTIMAGE_H__
+
+/*
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+*/
+
+QT_FT_BEGIN_HEADER
+
+
+ /*************************************************************************/
+ /* */
+ /* <Section> */
+ /* basic_types */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Type> */
+ /* QT_FT_Pos */
+ /* */
+ /* <Description> */
+ /* The type QT_FT_Pos is a 32-bit integer used to store vectorial */
+ /* coordinates. Depending on the context, these can represent */
+ /* distances in integer font units, or 16,16, or 26.6 fixed float */
+ /* pixel coordinates. */
+ /* */
+ typedef signed long QT_FT_Pos;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Vector */
+ /* */
+ /* <Description> */
+ /* A simple structure used to store a 2D vector; coordinates are of */
+ /* the QT_FT_Pos type. */
+ /* */
+ /* <Fields> */
+ /* x :: The horizontal coordinate. */
+ /* y :: The vertical coordinate. */
+ /* */
+ typedef struct QT_FT_Vector_
+ {
+ QT_FT_Pos x;
+ QT_FT_Pos y;
+
+ } QT_FT_Vector;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_BBox */
+ /* */
+ /* <Description> */
+ /* A structure used to hold an outline's bounding box, i.e., the */
+ /* coordinates of its extrema in the horizontal and vertical */
+ /* directions. */
+ /* */
+ /* <Fields> */
+ /* xMin :: The horizontal minimum (left-most). */
+ /* */
+ /* yMin :: The vertical minimum (bottom-most). */
+ /* */
+ /* xMax :: The horizontal maximum (right-most). */
+ /* */
+ /* yMax :: The vertical maximum (top-most). */
+ /* */
+ typedef struct QT_FT_BBox_
+ {
+ QT_FT_Pos xMin, yMin;
+ QT_FT_Pos xMax, yMax;
+
+ } QT_FT_BBox;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* QT_FT_Pixel_Mode */
+ /* */
+ /* <Description> */
+ /* An enumeration type used to describe the format of pixels in a */
+ /* given bitmap. Note that additional formats may be added in the */
+ /* future. */
+ /* */
+ /* <Values> */
+ /* QT_FT_PIXEL_MODE_NONE :: */
+ /* Value 0 is reserved. */
+ /* */
+ /* QT_FT_PIXEL_MODE_MONO :: */
+ /* A monochrome bitmap, using 1 bit per pixel. Note that pixels */
+ /* are stored in most-significant order (MSB), which means that */
+ /* the left-most pixel in a byte has value 128. */
+ /* */
+ /* QT_FT_PIXEL_MODE_GRAY :: */
+ /* An 8-bit bitmap, generally used to represent anti-aliased glyph */
+ /* images. Each pixel is stored in one byte. Note that the number */
+ /* of value "gray" levels is stored in the `num_bytes' field of */
+ /* the @QT_FT_Bitmap structure (it generally is 256). */
+ /* */
+ /* QT_FT_PIXEL_MODE_GRAY2 :: */
+ /* A 2-bit/pixel bitmap, used to represent embedded anti-aliased */
+ /* bitmaps in font files according to the OpenType specification. */
+ /* We haven't found a single font using this format, however. */
+ /* */
+ /* QT_FT_PIXEL_MODE_GRAY4 :: */
+ /* A 4-bit/pixel bitmap, used to represent embedded anti-aliased */
+ /* bitmaps in font files according to the OpenType specification. */
+ /* We haven't found a single font using this format, however. */
+ /* */
+ /* QT_FT_PIXEL_MODE_LCD :: */
+ /* An 8-bit bitmap, used to represent RGB or BGR decimated glyph */
+ /* images used for display on LCD displays; the bitmap's width is */
+ /* three times wider than the original glyph image. See also */
+ /* @QT_FT_RENDER_MODE_LCD. */
+ /* */
+ /* QT_FT_PIXEL_MODE_LCD_V :: */
+ /* An 8-bit bitmap, used to represent RGB or BGR decimated glyph */
+ /* images used for display on rotated LCD displays; the bitmap's */
+ /* height is three times taller than the original glyph image. */
+ /* See also @QT_FT_RENDER_MODE_LCD_V. */
+ /* */
+ typedef enum QT_FT_Pixel_Mode_
+ {
+ QT_FT_PIXEL_MODE_NONE = 0,
+ QT_FT_PIXEL_MODE_MONO,
+ QT_FT_PIXEL_MODE_GRAY,
+ QT_FT_PIXEL_MODE_GRAY2,
+ QT_FT_PIXEL_MODE_GRAY4,
+ QT_FT_PIXEL_MODE_LCD,
+ QT_FT_PIXEL_MODE_LCD_V,
+
+ QT_FT_PIXEL_MODE_MAX /* do not remove */
+
+ } QT_FT_Pixel_Mode;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* qt_ft_pixel_mode_xxx */
+ /* */
+ /* <Description> */
+ /* A list of deprecated constants. Use the corresponding */
+ /* @QT_FT_Pixel_Mode values instead. */
+ /* */
+ /* <Values> */
+ /* qt_ft_pixel_mode_none :: see @QT_FT_PIXEL_MODE_NONE */
+ /* qt_ft_pixel_mode_mono :: see @QT_FT_PIXEL_MODE_MONO */
+ /* qt_ft_pixel_mode_grays :: see @QT_FT_PIXEL_MODE_GRAY */
+ /* qt_ft_pixel_mode_pal2 :: see @QT_FT_PIXEL_MODE_GRAY2 */
+ /* qt_ft_pixel_mode_pal4 :: see @QT_FT_PIXEL_MODE_GRAY4 */
+ /* */
+#define qt_ft_pixel_mode_none QT_FT_PIXEL_MODE_NONE
+#define qt_ft_pixel_mode_mono QT_FT_PIXEL_MODE_MONO
+#define qt_ft_pixel_mode_grays QT_FT_PIXEL_MODE_GRAY
+#define qt_ft_pixel_mode_pal2 QT_FT_PIXEL_MODE_GRAY2
+#define qt_ft_pixel_mode_pal4 QT_FT_PIXEL_MODE_GRAY4
+
+ /* */
+
+#if 0
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* QT_FT_Palette_Mode */
+ /* */
+ /* <Description> */
+ /* THIS TYPE IS DEPRECATED. DO NOT USE IT! */
+ /* */
+ /* An enumeration type used to describe the format of a bitmap */
+ /* palette, used with qt_ft_pixel_mode_pal4 and qt_ft_pixel_mode_pal8. */
+ /* */
+ /* <Fields> */
+ /* qt_ft_palette_mode_rgb :: The palette is an array of 3-bytes RGB */
+ /* records. */
+ /* */
+ /* qt_ft_palette_mode_rgba :: The palette is an array of 4-bytes RGBA */
+ /* records. */
+ /* */
+ /* <Note> */
+ /* As qt_ft_pixel_mode_pal2, pal4 and pal8 are currently unused by */
+ /* FreeType, these types are not handled by the library itself. */
+ /* */
+ typedef enum QT_FT_Palette_Mode_
+ {
+ qt_ft_palette_mode_rgb = 0,
+ qt_ft_palette_mode_rgba,
+
+ qt_ft_palettte_mode_max /* do not remove */
+
+ } QT_FT_Palette_Mode;
+
+ /* */
+
+#endif
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Bitmap */
+ /* */
+ /* <Description> */
+ /* A structure used to describe a bitmap or pixmap to the raster. */
+ /* Note that we now manage pixmaps of various depths through the */
+ /* `pixel_mode' field. */
+ /* */
+ /* <Fields> */
+ /* rows :: The number of bitmap rows. */
+ /* */
+ /* width :: The number of pixels in bitmap row. */
+ /* */
+ /* pitch :: The pitch's absolute value is the number of bytes */
+ /* taken by one bitmap row, including padding. */
+ /* However, the pitch is positive when the bitmap has */
+ /* a `down' flow, and negative when it has an `up' */
+ /* flow. In all cases, the pitch is an offset to add */
+ /* to a bitmap pointer in order to go down one row. */
+ /* */
+ /* buffer :: A typeless pointer to the bitmap buffer. This */
+ /* value should be aligned on 32-bit boundaries in */
+ /* most cases. */
+ /* */
+ /* num_grays :: This field is only used with */
+ /* `QT_FT_PIXEL_MODE_GRAY'; it gives the number of gray */
+ /* levels used in the bitmap. */
+ /* */
+ /* pixel_mode :: The pixel mode, i.e., how pixel bits are stored. */
+ /* See @QT_FT_Pixel_Mode for possible values. */
+ /* */
+ /* palette_mode :: This field is only used with paletted pixel modes; */
+ /* it indicates how the palette is stored. */
+ /* */
+ /* palette :: A typeless pointer to the bitmap palette; only */
+ /* used for paletted pixel modes. */
+ /* */
+ /* <Note> */
+ /* For now, the only pixel mode supported by FreeType are mono and */
+ /* grays. However, drivers might be added in the future to support */
+ /* more `colorful' options. */
+ /* */
+ /* When using pixel modes pal2, pal4 and pal8 with a void `palette' */
+ /* field, a gray pixmap with respectively 4, 16, and 256 levels of */
+ /* gray is assumed. This, in order to be compatible with some */
+ /* embedded bitmap formats defined in the TrueType specification. */
+ /* */
+ /* Note that no font was found presenting such embedded bitmaps, so */
+ /* this is currently completely unhandled by the library. */
+ /* */
+ typedef struct QT_FT_Bitmap_
+ {
+ int rows;
+ int width;
+ int pitch;
+ unsigned char* buffer;
+ short num_grays;
+ char pixel_mode;
+ char palette_mode;
+ void* palette;
+
+ } QT_FT_Bitmap;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Section> */
+ /* outline_processing */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Outline */
+ /* */
+ /* <Description> */
+ /* This structure is used to describe an outline to the scan-line */
+ /* converter. */
+ /* */
+ /* <Fields> */
+ /* n_contours :: The number of contours in the outline. */
+ /* */
+ /* n_points :: The number of points in the outline. */
+ /* */
+ /* points :: A pointer to an array of `n_points' QT_FT_Vector */
+ /* elements, giving the outline's point coordinates. */
+ /* */
+ /* tags :: A pointer to an array of `n_points' chars, giving */
+ /* each outline point's type. If bit 0 is unset, the */
+ /* point is `off' the curve, i.e. a Bezier control */
+ /* point, while it is `on' when set. */
+ /* */
+ /* Bit 1 is meaningful for `off' points only. If set, */
+ /* it indicates a third-order Bezier arc control point; */
+ /* and a second-order control point if unset. */
+ /* */
+ /* contours :: An array of `n_contours' shorts, giving the end */
+ /* point of each contour within the outline. For */
+ /* example, the first contour is defined by the points */
+ /* `0' to `contours[0]', the second one is defined by */
+ /* the points `contours[0]+1' to `contours[1]', etc. */
+ /* */
+ /* flags :: A set of bit flags used to characterize the outline */
+ /* and give hints to the scan-converter and hinter on */
+ /* how to convert/grid-fit it. See QT_FT_Outline_Flags. */
+ /* */
+ typedef struct QT_FT_Outline_
+ {
+ int n_contours; /* number of contours in glyph */
+ int n_points; /* number of points in the glyph */
+
+ QT_FT_Vector* points; /* the outline's points */
+ char* tags; /* the points flags */
+ int* contours; /* the contour end points */
+
+ int flags; /* outline masks */
+
+ } QT_FT_Outline;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* QT_FT_OUTLINE_FLAGS */
+ /* */
+ /* <Description> */
+ /* A list of bit-field constants use for the flags in an outline's */
+ /* `flags' field. */
+ /* */
+ /* <Values> */
+ /* QT_FT_OUTLINE_NONE :: Value 0 is reserved. */
+ /* */
+ /* QT_FT_OUTLINE_OWNER :: If set, this flag indicates that the */
+ /* outline's field arrays (i.e. */
+ /* `points', `flags' & `contours') are */
+ /* `owned' by the outline object, and */
+ /* should thus be freed when it is */
+ /* destroyed. */
+ /* */
+ /* QT_FT_OUTLINE_EVEN_ODD_FILL :: By default, outlines are filled using */
+ /* the non-zero winding rule. If set to */
+ /* 1, the outline will be filled using */
+ /* the even-odd fill rule (only works */
+ /* with the smooth raster). */
+ /* */
+ /* QT_FT_OUTLINE_REVERSE_FILL :: By default, outside contours of an */
+ /* outline are oriented in clock-wise */
+ /* direction, as defined in the TrueType */
+ /* specification. This flag is set if */
+ /* the outline uses the opposite */
+ /* direction (typically for Type 1 */
+ /* fonts). This flag is ignored by the */
+ /* scan-converter. However, it is very */
+ /* important for the auto-hinter. */
+ /* */
+ /* QT_FT_OUTLINE_IGNORE_DROPOUTS :: By default, the scan converter will */
+ /* try to detect drop-outs in an outline */
+ /* and correct the glyph bitmap to */
+ /* ensure consistent shape continuity. */
+ /* If set, this flag hints the scan-line */
+ /* converter to ignore such cases. */
+ /* */
+ /* QT_FT_OUTLINE_HIGH_PRECISION :: This flag indicates that the */
+ /* scan-line converter should try to */
+ /* convert this outline to bitmaps with */
+ /* the highest possible quality. It is */
+ /* typically set for small character */
+ /* sizes. Note that this is only a */
+ /* hint, that might be completely */
+ /* ignored by a given scan-converter. */
+ /* */
+ /* QT_FT_OUTLINE_SINGLE_PASS :: This flag is set to force a given */
+ /* scan-converter to only use a single */
+ /* pass over the outline to render a */
+ /* bitmap glyph image. Normally, it is */
+ /* set for very large character sizes. */
+ /* It is only a hint, that might be */
+ /* completely ignored by a given */
+ /* scan-converter. */
+ /* */
+#define QT_FT_OUTLINE_NONE 0x0
+#define QT_FT_OUTLINE_OWNER 0x1
+#define QT_FT_OUTLINE_EVEN_ODD_FILL 0x2
+#define QT_FT_OUTLINE_REVERSE_FILL 0x4
+#define QT_FT_OUTLINE_IGNORE_DROPOUTS 0x8
+
+#define QT_FT_OUTLINE_HIGH_PRECISION 0x100
+#define QT_FT_OUTLINE_SINGLE_PASS 0x200
+
+
+ /*************************************************************************
+ *
+ * @enum:
+ * qt_ft_outline_flags
+ *
+ * @description:
+ * These constants are deprecated. Please use the corresponding
+ * @QT_FT_OUTLINE_FLAGS values.
+ *
+ * @values:
+ * qt_ft_outline_none :: See @QT_FT_OUTLINE_NONE.
+ * qt_ft_outline_owner :: See @QT_FT_OUTLINE_OWNER.
+ * qt_ft_outline_even_odd_fill :: See @QT_FT_OUTLINE_EVEN_ODD_FILL.
+ * qt_ft_outline_reverse_fill :: See @QT_FT_OUTLINE_REVERSE_FILL.
+ * qt_ft_outline_ignore_dropouts :: See @QT_FT_OUTLINE_IGNORE_DROPOUTS.
+ * qt_ft_outline_high_precision :: See @QT_FT_OUTLINE_HIGH_PRECISION.
+ * qt_ft_outline_single_pass :: See @QT_FT_OUTLINE_SINGLE_PASS.
+ */
+#define qt_ft_outline_none QT_FT_OUTLINE_NONE
+#define qt_ft_outline_owner QT_FT_OUTLINE_OWNER
+#define qt_ft_outline_even_odd_fill QT_FT_OUTLINE_EVEN_ODD_FILL
+#define qt_ft_outline_reverse_fill QT_FT_OUTLINE_REVERSE_FILL
+#define qt_ft_outline_ignore_dropouts QT_FT_OUTLINE_IGNORE_DROPOUTS
+#define qt_ft_outline_high_precision QT_FT_OUTLINE_HIGH_PRECISION
+#define qt_ft_outline_single_pass QT_FT_OUTLINE_SINGLE_PASS
+
+ /* */
+
+#define QT_FT_CURVE_TAG( flag ) ( flag & 3 )
+
+#define QT_FT_CURVE_TAG_ON 1
+#define QT_FT_CURVE_TAG_CONIC 0
+#define QT_FT_CURVE_TAG_CUBIC 2
+
+#define QT_FT_CURVE_TAG_TOUCH_X 8 /* reserved for the TrueType hinter */
+#define QT_FT_CURVE_TAG_TOUCH_Y 16 /* reserved for the TrueType hinter */
+
+#define QT_FT_CURVE_TAG_TOUCH_BOTH ( QT_FT_CURVE_TAG_TOUCH_X | \
+ QT_FT_CURVE_TAG_TOUCH_Y )
+
+#define QT_FT_Curve_Tag_On QT_FT_CURVE_TAG_ON
+#define QT_FT_Curve_Tag_Conic QT_FT_CURVE_TAG_CONIC
+#define QT_FT_Curve_Tag_Cubic QT_FT_CURVE_TAG_CUBIC
+#define QT_FT_Curve_Tag_Touch_X QT_FT_CURVE_TAG_TOUCH_X
+#define QT_FT_Curve_Tag_Touch_Y QT_FT_CURVE_TAG_TOUCH_Y
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Outline_MoveToFunc */
+ /* */
+ /* <Description> */
+ /* A function pointer type used to describe the signature of a `move */
+ /* to' function during outline walking/decomposition. */
+ /* */
+ /* A `move to' is emitted to start a new contour in an outline. */
+ /* */
+ /* <Input> */
+ /* to :: A pointer to the target point of the `move to'. */
+ /* */
+ /* user :: A typeless pointer which is passed from the caller of the */
+ /* decomposition function. */
+ /* */
+ /* <Return> */
+ /* Error code. 0 means success. */
+ /* */
+ typedef int
+ (*QT_FT_Outline_MoveToFunc)( QT_FT_Vector* to,
+ void* user );
+
+#define QT_FT_Outline_MoveTo_Func QT_FT_Outline_MoveToFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Outline_LineToFunc */
+ /* */
+ /* <Description> */
+ /* A function pointer type used to describe the signature of a `line */
+ /* to' function during outline walking/decomposition. */
+ /* */
+ /* A `line to' is emitted to indicate a segment in the outline. */
+ /* */
+ /* <Input> */
+ /* to :: A pointer to the target point of the `line to'. */
+ /* */
+ /* user :: A typeless pointer which is passed from the caller of the */
+ /* decomposition function. */
+ /* */
+ /* <Return> */
+ /* Error code. 0 means success. */
+ /* */
+ typedef int
+ (*QT_FT_Outline_LineToFunc)( QT_FT_Vector* to,
+ void* user );
+
+#define QT_FT_Outline_LineTo_Func QT_FT_Outline_LineToFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Outline_ConicToFunc */
+ /* */
+ /* <Description> */
+ /* A function pointer type use to describe the signature of a `conic */
+ /* to' function during outline walking/decomposition. */
+ /* */
+ /* A `conic to' is emitted to indicate a second-order Bezier arc in */
+ /* the outline. */
+ /* */
+ /* <Input> */
+ /* control :: An intermediate control point between the last position */
+ /* and the new target in `to'. */
+ /* */
+ /* to :: A pointer to the target end point of the conic arc. */
+ /* */
+ /* user :: A typeless pointer which is passed from the caller of */
+ /* the decomposition function. */
+ /* */
+ /* <Return> */
+ /* Error code. 0 means success. */
+ /* */
+ typedef int
+ (*QT_FT_Outline_ConicToFunc)( QT_FT_Vector* control,
+ QT_FT_Vector* to,
+ void* user );
+
+#define QT_FT_Outline_ConicTo_Func QT_FT_Outline_ConicToFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Outline_CubicToFunc */
+ /* */
+ /* <Description> */
+ /* A function pointer type used to describe the signature of a `cubic */
+ /* to' function during outline walking/decomposition. */
+ /* */
+ /* A `cubic to' is emitted to indicate a third-order Bezier arc. */
+ /* */
+ /* <Input> */
+ /* control1 :: A pointer to the first Bezier control point. */
+ /* */
+ /* control2 :: A pointer to the second Bezier control point. */
+ /* */
+ /* to :: A pointer to the target end point. */
+ /* */
+ /* user :: A typeless pointer which is passed from the caller of */
+ /* the decomposition function. */
+ /* */
+ /* <Return> */
+ /* Error code. 0 means success. */
+ /* */
+ typedef int
+ (*QT_FT_Outline_CubicToFunc)( QT_FT_Vector* control1,
+ QT_FT_Vector* control2,
+ QT_FT_Vector* to,
+ void* user );
+
+#define QT_FT_Outline_CubicTo_Func QT_FT_Outline_CubicToFunc
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Outline_Funcs */
+ /* */
+ /* <Description> */
+ /* A structure to hold various function pointers used during outline */
+ /* decomposition in order to emit segments, conic, and cubic Beziers, */
+ /* as well as `move to' and `close to' operations. */
+ /* */
+ /* <Fields> */
+ /* move_to :: The `move to' emitter. */
+ /* */
+ /* line_to :: The segment emitter. */
+ /* */
+ /* conic_to :: The second-order Bezier arc emitter. */
+ /* */
+ /* cubic_to :: The third-order Bezier arc emitter. */
+ /* */
+ /* shift :: The shift that is applied to coordinates before they */
+ /* are sent to the emitter. */
+ /* */
+ /* delta :: The delta that is applied to coordinates before they */
+ /* are sent to the emitter, but after the shift. */
+ /* */
+ /* <Note> */
+ /* The point coordinates sent to the emitters are the transformed */
+ /* version of the original coordinates (this is important for high */
+ /* accuracy during scan-conversion). The transformation is simple: */
+ /* */
+ /* x' = (x << shift) - delta */
+ /* y' = (x << shift) - delta */
+ /* */
+ /* Set the value of `shift' and `delta' to 0 to get the original */
+ /* point coordinates. */
+ /* */
+ typedef struct QT_FT_Outline_Funcs_
+ {
+ QT_FT_Outline_MoveToFunc move_to;
+ QT_FT_Outline_LineToFunc line_to;
+ QT_FT_Outline_ConicToFunc conic_to;
+ QT_FT_Outline_CubicToFunc cubic_to;
+
+ int shift;
+ QT_FT_Pos delta;
+
+ } QT_FT_Outline_Funcs;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Section> */
+ /* basic_types */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Macro> */
+ /* QT_FT_IMAGE_TAG */
+ /* */
+ /* <Description> */
+ /* This macro converts four letter tags into an unsigned long. */
+ /* */
+ /* <Note> */
+ /* Since many 16bit compilers don't like 32bit enumerations, you */
+ /* should redefine this macro in case of problems to something like */
+ /* this: */
+ /* */
+ /* #define QT_FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) value */
+ /* */
+ /* to get a simple enumeration without assigning special numbers. */
+ /* */
+#ifndef QT_FT_IMAGE_TAG
+#define QT_FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) \
+ value = ( ( (unsigned long)_x1 << 24 ) | \
+ ( (unsigned long)_x2 << 16 ) | \
+ ( (unsigned long)_x3 << 8 ) | \
+ (unsigned long)_x4 )
+#endif /* QT_FT_IMAGE_TAG */
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* QT_FT_Glyph_Format */
+ /* */
+ /* <Description> */
+ /* An enumeration type used to describe the format of a given glyph */
+ /* image. Note that this version of FreeType only supports two image */
+ /* formats, even though future font drivers will be able to register */
+ /* their own format. */
+ /* */
+ /* <Values> */
+ /* QT_FT_GLYPH_FORMAT_NONE :: */
+ /* The value 0 is reserved and does describe a glyph format. */
+ /* */
+ /* QT_FT_GLYPH_FORMAT_COMPOSITE :: */
+ /* The glyph image is a composite of several other images. This */
+ /* format is _only_ used with @QT_FT_LOAD_NO_RECURSE, and is used to */
+ /* report compound glyphs (like accented characters). */
+ /* */
+ /* QT_FT_GLYPH_FORMAT_BITMAP :: */
+ /* The glyph image is a bitmap, and can be described as an */
+ /* @QT_FT_Bitmap. You generally need to access the `bitmap' field of */
+ /* the @QT_FT_GlyphSlotRec structure to read it. */
+ /* */
+ /* QT_FT_GLYPH_FORMAT_OUTLINE :: */
+ /* The glyph image is a vertorial outline made of line segments */
+ /* and Bezier arcs; it can be described as an @QT_FT_Outline; you */
+ /* generally want to access the `outline' field of the */
+ /* @QT_FT_GlyphSlotRec structure to read it. */
+ /* */
+ /* QT_FT_GLYPH_FORMAT_PLOTTER :: */
+ /* The glyph image is a vectorial path with no inside/outside */
+ /* contours. Some Type 1 fonts, like those in the Hershey family, */
+ /* contain glyphs in this format. These are described as */
+ /* @QT_FT_Outline, but FreeType isn't currently capable of rendering */
+ /* them correctly. */
+ /* */
+ typedef enum QT_FT_Glyph_Format_
+ {
+ QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_NONE, 0, 0, 0, 0 ),
+
+ QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_COMPOSITE, 'c', 'o', 'm', 'p' ),
+ QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_BITMAP, 'b', 'i', 't', 's' ),
+ QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_OUTLINE, 'o', 'u', 't', 'l' ),
+ QT_FT_IMAGE_TAG( QT_FT_GLYPH_FORMAT_PLOTTER, 'p', 'l', 'o', 't' )
+
+ } QT_FT_Glyph_Format;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* qt_ft_glyph_format_xxx */
+ /* */
+ /* <Description> */
+ /* A list of decprecated constants. Use the corresponding */
+ /* @QT_FT_Glyph_Format values instead. */
+ /* */
+ /* <Values> */
+ /* qt_ft_glyph_format_none :: see @QT_FT_GLYPH_FORMAT_NONE */
+ /* qt_ft_glyph_format_composite :: see @QT_FT_GLYPH_FORMAT_COMPOSITE */
+ /* qt_ft_glyph_format_bitmap :: see @QT_FT_GLYPH_FORMAT_BITMAP */
+ /* qt_ft_glyph_format_outline :: see @QT_FT_GLYPH_FORMAT_OUTLINE */
+ /* qt_ft_glyph_format_plotter :: see @QT_FT_GLYPH_FORMAT_PLOTTER */
+ /* */
+#define qt_ft_glyph_format_none QT_FT_GLYPH_FORMAT_NONE
+#define qt_ft_glyph_format_composite QT_FT_GLYPH_FORMAT_COMPOSITE
+#define qt_ft_glyph_format_bitmap QT_FT_GLYPH_FORMAT_BITMAP
+#define qt_ft_glyph_format_outline QT_FT_GLYPH_FORMAT_OUTLINE
+#define qt_ft_glyph_format_plotter QT_FT_GLYPH_FORMAT_PLOTTER
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** R A S T E R D E F I N I T I O N S *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* A raster is a scan converter, in charge of rendering an outline into */
+ /* a a bitmap. This section contains the public API for rasters. */
+ /* */
+ /* Note that in FreeType 2, all rasters are now encapsulated within */
+ /* specific modules called `renderers'. See `freetype/ftrender.h' for */
+ /* more details on renderers. */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Section> */
+ /* raster */
+ /* */
+ /* <Title> */
+ /* Scanline converter */
+ /* */
+ /* <Abstract> */
+ /* How vectorial outlines are converted into bitmaps and pixmaps. */
+ /* */
+ /* <Description> */
+ /* This section contains technical definitions. */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Type> */
+ /* QT_FT_Raster */
+ /* */
+ /* <Description> */
+ /* A handle (pointer) to a raster object. Each object can be used */
+ /* independently to convert an outline into a bitmap or pixmap. */
+ /* */
+ typedef struct QT_FT_RasterRec_* QT_FT_Raster;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Span */
+ /* */
+ /* <Description> */
+ /* A structure used to model a single span of gray (or black) pixels */
+ /* when rendering a monochrome or anti-aliased bitmap. */
+ /* */
+ /* <Fields> */
+ /* x :: The span's horizontal start position. */
+ /* */
+ /* len :: The span's length in pixels. */
+ /* */
+ /* coverage :: The span color/coverage, ranging from 0 (background) */
+ /* to 255 (foreground). Only used for anti-aliased */
+ /* rendering. */
+ /* */
+ /* <Note> */
+ /* This structure is used by the span drawing callback type named */
+ /* QT_FT_SpanFunc which takes the y-coordinate of the span as a */
+ /* a parameter. */
+ /* */
+ /* The coverage value is always between 0 and 255, even if the number */
+ /* of gray levels have been set through QT_FT_Set_Gray_Levels(). */
+ /* */
+ typedef struct QT_FT_Span_
+ {
+ short x;
+ unsigned short len;
+ short y;
+ unsigned char coverage;
+ } QT_FT_Span;
+
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_SpanFunc */
+ /* */
+ /* <Description> */
+ /* A function used as a call-back by the anti-aliased renderer in */
+ /* order to let client applications draw themselves the gray pixel */
+ /* spans on each scan line. */
+ /* */
+ /* <Input> */
+ /* y :: The scanline's y-coordinate. */
+ /* */
+ /* count :: The number of spans to draw on this scanline. */
+ /* */
+ /* spans :: A table of `count' spans to draw on the scanline. */
+ /* */
+ /* user :: User-supplied data that is passed to the callback. */
+ /* */
+ /* <Note> */
+ /* This callback allows client applications to directly render the */
+ /* gray spans of the anti-aliased bitmap to any kind of surfaces. */
+ /* */
+ /* This can be used to write anti-aliased outlines directly to a */
+ /* given background bitmap, and even perform translucency. */
+ /* */
+ /* Note that the `count' field cannot be greater than a fixed value */
+ /* defined by the QT_FT_MAX_GRAY_SPANS configuration macro in */
+ /* ftoption.h. By default, this value is set to 32, which means that */
+ /* if there are more than 32 spans on a given scanline, the callback */
+ /* will be called several times with the same `y' parameter in order */
+ /* to draw all callbacks. */
+ /* */
+ /* Otherwise, the callback is only called once per scan-line, and */
+ /* only for those scanlines that do have `gray' pixels on them. */
+ /* */
+ typedef void
+ (*QT_FT_SpanFunc)(int count,
+ const QT_FT_Span* spans,
+ void* worker);
+
+#define QT_FT_Raster_Span_Func QT_FT_SpanFunc
+
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_BitTest_Func */
+ /* */
+ /* <Description> */
+ /* THIS TYPE IS DEPRECATED. DO NOT USE IT. */
+ /* */
+ /* A function used as a call-back by the monochrome scan-converter */
+ /* to test whether a given target pixel is already set to the drawing */
+ /* `color'. These tests are crucial to implement drop-out control */
+ /* per-se the TrueType spec. */
+ /* */
+ /* <Input> */
+ /* y :: The pixel's y-coordinate. */
+ /* */
+ /* x :: The pixel's x-coordinate. */
+ /* */
+ /* user :: User-supplied data that is passed to the callback. */
+ /* */
+ /* <Return> */
+ /* 1 if the pixel is `set', 0 otherwise. */
+ /* */
+ typedef int
+ (*QT_FT_Raster_BitTest_Func)( int y,
+ int x,
+ void* user );
+
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_BitSet_Func */
+ /* */
+ /* <Description> */
+ /* THIS TYPE IS DEPRECATED. DO NOT USE IT. */
+ /* */
+ /* A function used as a call-back by the monochrome scan-converter */
+ /* to set an individual target pixel. This is crucial to implement */
+ /* drop-out control according to the TrueType specification. */
+ /* */
+ /* <Input> */
+ /* y :: The pixel's y-coordinate. */
+ /* */
+ /* x :: The pixel's x-coordinate. */
+ /* */
+ /* user :: User-supplied data that is passed to the callback. */
+ /* */
+ /* <Return> */
+ /* 1 if the pixel is `set', 0 otherwise. */
+ /* */
+ typedef void
+ (*QT_FT_Raster_BitSet_Func)( int y,
+ int x,
+ void* user );
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* QT_FT_RASTER_FLAG_XXX */
+ /* */
+ /* <Description> */
+ /* A list of bit flag constants as used in the `flags' field of a */
+ /* @QT_FT_Raster_Params structure. */
+ /* */
+ /* <Values> */
+ /* QT_FT_RASTER_FLAG_DEFAULT :: This value is 0. */
+ /* */
+ /* QT_FT_RASTER_FLAG_AA :: This flag is set to indicate that an */
+ /* anti-aliased glyph image should be */
+ /* generated. Otherwise, it will be */
+ /* monochrome (1-bit). */
+ /* */
+ /* QT_FT_RASTER_FLAG_DIRECT :: This flag is set to indicate direct */
+ /* rendering. In this mode, client */
+ /* applications must provide their own span */
+ /* callback. This lets them directly */
+ /* draw or compose over an existing bitmap. */
+ /* If this bit is not set, the target */
+ /* pixmap's buffer _must_ be zeroed before */
+ /* rendering. */
+ /* */
+ /* Note that for now, direct rendering is */
+ /* only possible with anti-aliased glyphs. */
+ /* */
+ /* QT_FT_RASTER_FLAG_CLIP :: This flag is only used in direct */
+ /* rendering mode. If set, the output will */
+ /* be clipped to a box specified in the */
+ /* "clip_box" field of the QT_FT_Raster_Params */
+ /* structure. */
+ /* */
+ /* Note that by default, the glyph bitmap */
+ /* is clipped to the target pixmap, except */
+ /* in direct rendering mode where all spans */
+ /* are generated if no clipping box is set. */
+ /* */
+#define QT_FT_RASTER_FLAG_DEFAULT 0x0
+#define QT_FT_RASTER_FLAG_AA 0x1
+#define QT_FT_RASTER_FLAG_DIRECT 0x2
+#define QT_FT_RASTER_FLAG_CLIP 0x4
+
+ /* deprecated */
+#define qt_ft_raster_flag_default QT_FT_RASTER_FLAG_DEFAULT
+#define qt_ft_raster_flag_aa QT_FT_RASTER_FLAG_AA
+#define qt_ft_raster_flag_direct QT_FT_RASTER_FLAG_DIRECT
+#define qt_ft_raster_flag_clip QT_FT_RASTER_FLAG_CLIP
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Raster_Params */
+ /* */
+ /* <Description> */
+ /* A structure to hold the arguments used by a raster's render */
+ /* function. */
+ /* */
+ /* <Fields> */
+ /* target :: The target bitmap. */
+ /* */
+ /* source :: A pointer to the source glyph image (e.g. an */
+ /* QT_FT_Outline). */
+ /* */
+ /* flags :: The rendering flags. */
+ /* */
+ /* gray_spans :: The gray span drawing callback. */
+ /* */
+ /* black_spans :: The black span drawing callback. */
+ /* */
+ /* bit_test :: The bit test callback. UNIMPLEMENTED! */
+ /* */
+ /* bit_set :: The bit set callback. UNIMPLEMENTED! */
+ /* */
+ /* user :: User-supplied data that is passed to each drawing */
+ /* callback. */
+ /* */
+ /* clip_box :: An optional clipping box. It is only used in */
+ /* direct rendering mode. Note that coordinates here */
+ /* should be expressed in _integer_ pixels (and not in */
+ /* 26.6 fixed-point units). */
+ /* */
+ /* <Note> */
+ /* An anti-aliased glyph bitmap is drawn if the QT_FT_RASTER_FLAG_AA bit */
+ /* flag is set in the `flags' field, otherwise a monochrome bitmap */
+ /* will be generated. */
+ /* */
+ /* If the QT_FT_RASTER_FLAG_DIRECT bit flag is set in `flags', the */
+ /* raster will call the `gray_spans' callback to draw gray pixel */
+ /* spans, in the case of an aa glyph bitmap, it will call */
+ /* `black_spans', and `bit_test' and `bit_set' in the case of a */
+ /* monochrome bitmap. This allows direct composition over a */
+ /* pre-existing bitmap through user-provided callbacks to perform the */
+ /* span drawing/composition. */
+ /* */
+ /* Note that the `bit_test' and `bit_set' callbacks are required when */
+ /* rendering a monochrome bitmap, as they are crucial to implement */
+ /* correct drop-out control as defined in the TrueType specification. */
+ /* */
+ typedef struct QT_FT_Raster_Params_
+ {
+ QT_FT_Bitmap* target;
+ void* source;
+ int flags;
+ QT_FT_SpanFunc gray_spans;
+ QT_FT_SpanFunc black_spans;
+ QT_FT_Raster_BitTest_Func bit_test; /* doesn't work! */
+ QT_FT_Raster_BitSet_Func bit_set; /* doesn't work! */
+ void* user;
+ QT_FT_BBox clip_box;
+
+ } QT_FT_Raster_Params;
+
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_NewFunc */
+ /* */
+ /* <Description> */
+ /* A function used to create a new raster object. */
+ /* */
+ /* <Input> */
+ /* memory :: A handle to the memory allocator. */
+ /* */
+ /* <Output> */
+ /* raster :: A handle to the new raster object. */
+ /* */
+ /* <Return> */
+ /* Error code. 0 means success. */
+ /* */
+ /* <Note> */
+ /* The `memory' parameter is a typeless pointer in order to avoid */
+ /* un-wanted dependencies on the rest of the FreeType code. In */
+ /* practice, it is a QT_FT_Memory, i.e., a handle to the standard */
+ /* FreeType memory allocator. However, this field can be completely */
+ /* ignored by a given raster implementation. */
+ /* */
+ typedef int
+ (*QT_FT_Raster_NewFunc)( void* memory,
+ QT_FT_Raster* raster );
+
+#define QT_FT_Raster_New_Func QT_FT_Raster_NewFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_DoneFunc */
+ /* */
+ /* <Description> */
+ /* A function used to destroy a given raster object. */
+ /* */
+ /* <Input> */
+ /* raster :: A handle to the raster object. */
+ /* */
+ typedef void
+ (*QT_FT_Raster_DoneFunc)( QT_FT_Raster raster );
+
+#define QT_FT_Raster_Done_Func QT_FT_Raster_DoneFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_ResetFunc */
+ /* */
+ /* <Description> */
+ /* FreeType provides an area of memory called the `render pool', */
+ /* available to all registered rasters. This pool can be freely used */
+ /* during a given scan-conversion but is shared by all rasters. Its */
+ /* content is thus transient. */
+ /* */
+ /* This function is called each time the render pool changes, or just */
+ /* after a new raster object is created. */
+ /* */
+ /* <Input> */
+ /* raster :: A handle to the new raster object. */
+ /* */
+ /* pool_base :: The address in memory of the render pool. */
+ /* */
+ /* pool_size :: The size in bytes of the render pool. */
+ /* */
+ /* <Note> */
+ /* Rasters can ignore the render pool and rely on dynamic memory */
+ /* allocation if they want to (a handle to the memory allocator is */
+ /* passed to the raster constructor). However, this is not */
+ /* recommended for efficiency purposes. */
+ /* */
+ typedef void
+ (*QT_FT_Raster_ResetFunc)( QT_FT_Raster raster,
+ unsigned char* pool_base,
+ unsigned long pool_size );
+
+#define QT_FT_Raster_Reset_Func QT_FT_Raster_ResetFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_SetModeFunc */
+ /* */
+ /* <Description> */
+ /* This function is a generic facility to change modes or attributes */
+ /* in a given raster. This can be used for debugging purposes, or */
+ /* simply to allow implementation-specific `features' in a given */
+ /* raster module. */
+ /* */
+ /* <Input> */
+ /* raster :: A handle to the new raster object. */
+ /* */
+ /* mode :: A 4-byte tag used to name the mode or property. */
+ /* */
+ /* args :: A pointer to the new mode/property to use. */
+ /* */
+ typedef int
+ (*QT_FT_Raster_SetModeFunc)( QT_FT_Raster raster,
+ unsigned long mode,
+ void* args );
+
+#define QT_FT_Raster_Set_Mode_Func QT_FT_Raster_SetModeFunc
+
+ /*************************************************************************/
+ /* */
+ /* <FuncType> */
+ /* QT_FT_Raster_RenderFunc */
+ /* */
+ /* <Description> */
+ /* Invokes a given raster to scan-convert a given glyph image into a */
+ /* target bitmap. */
+ /* */
+ /* <Input> */
+ /* raster :: A handle to the raster object. */
+ /* */
+ /* params :: A pointer to a QT_FT_Raster_Params structure used to store */
+ /* the rendering parameters. */
+ /* */
+ /* <Return> */
+ /* Error code. 0 means success. */
+ /* */
+ /* <Note> */
+ /* The exact format of the source image depends on the raster's glyph */
+ /* format defined in its QT_FT_Raster_Funcs structure. It can be an */
+ /* QT_FT_Outline or anything else in order to support a large array of */
+ /* glyph formats. */
+ /* */
+ /* Note also that the render function can fail and return a */
+ /* QT_FT_Err_Unimplemented_Feature error code if the raster used does */
+ /* not support direct composition. */
+ /* */
+ /* XXX: For now, the standard raster doesn't support direct */
+ /* composition but this should change for the final release (see */
+ /* the files demos/src/ftgrays.c and demos/src/ftgrays2.c for */
+ /* examples of distinct implementations which support direct */
+ /* composition). */
+ /* */
+ typedef int
+ (*QT_FT_Raster_RenderFunc)( QT_FT_Raster raster,
+ QT_FT_Raster_Params* params );
+
+#define QT_FT_Raster_Render_Func QT_FT_Raster_RenderFunc
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* QT_FT_Raster_Funcs */
+ /* */
+ /* <Description> */
+ /* A structure used to describe a given raster class to the library. */
+ /* */
+ /* <Fields> */
+ /* glyph_format :: The supported glyph format for this raster. */
+ /* */
+ /* raster_new :: The raster constructor. */
+ /* */
+ /* raster_reset :: Used to reset the render pool within the raster. */
+ /* */
+ /* raster_render :: A function to render a glyph into a given bitmap. */
+ /* */
+ /* raster_done :: The raster destructor. */
+ /* */
+ typedef struct QT_FT_Raster_Funcs_
+ {
+ QT_FT_Glyph_Format glyph_format;
+ QT_FT_Raster_NewFunc raster_new;
+ QT_FT_Raster_ResetFunc raster_reset;
+ QT_FT_Raster_SetModeFunc raster_set_mode;
+ QT_FT_Raster_RenderFunc raster_render;
+ QT_FT_Raster_DoneFunc raster_done;
+
+ } QT_FT_Raster_Funcs;
+
+
+ /* */
+
+
+QT_FT_END_HEADER
+
+#endif /* __FTIMAGE_H__ */
+
+
+/* END */