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Diffstat (limited to 'src/gui/painting/qrasterdefs_p.h')
| -rw-r--r-- | src/gui/painting/qrasterdefs_p.h | 1279 |
1 files changed, 1279 insertions, 0 deletions
diff --git a/src/gui/painting/qrasterdefs_p.h b/src/gui/painting/qrasterdefs_p.h new file mode 100644 index 0000000000..706064c305 --- /dev/null +++ b/src/gui/painting/qrasterdefs_p.h @@ -0,0 +1,1279 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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 int 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 TRaster_ *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; + int skip_spans; + + } 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)( 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 */ |