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Diffstat (limited to 'ext/gd/libgd/gd.h')
| -rw-r--r-- | ext/gd/libgd/gd.h | 509 |
1 files changed, 0 insertions, 509 deletions
diff --git a/ext/gd/libgd/gd.h b/ext/gd/libgd/gd.h deleted file mode 100644 index 8dfb301e02..0000000000 --- a/ext/gd/libgd/gd.h +++ /dev/null @@ -1,509 +0,0 @@ -#ifndef GD_H -#define GD_H 1 - -#ifdef __cplusplus -extern "C" { -#endif - -/* default fontpath for unix systems */ -#define DEFAULT_FONTPATH "/usr/share/fonts/truetype" -#define PATHSEPARATOR ":" - -/* gd.h: declarations file for the graphic-draw module. - * Permission to use, copy, modify, and distribute this software and its - * documentation for any purpose and without fee is hereby granted, provided - * that the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation. This software is provided "AS IS." Thomas Boutell and - * Boutell.Com, Inc. disclaim all warranties, either express or implied, - * including but not limited to implied warranties of merchantability and - * fitness for a particular purpose, with respect to this code and accompanying - * documentation. */ - -/* stdio is needed for file I/O. */ -#include <stdio.h> -#include "gd_io.h" - -/* The maximum number of palette entries in palette-based images. - In the wonderful new world of gd 2.0, you can of course have - many more colors when using truecolor mode. */ - -#define gdMaxColors 256 - -/* Image type. See functions below; you will not need to change - the elements directly. Use the provided macros to - access sx, sy, the color table, and colorsTotal for - read-only purposes. */ - -/* If 'truecolor' is set true, the image is truecolor; - pixels are represented by integers, which - must be 32 bits wide or more. - - True colors are repsented as follows: - - ARGB - - Where 'A' (alpha channel) occupies only the - LOWER 7 BITS of the MSB. This very small - loss of alpha channel resolution allows gd 2.x - to keep backwards compatibility by allowing - signed integers to be used to represent colors, - and negative numbers to represent special cases, - just as in gd 1.x. */ - -#define gdAlphaMax 127 -#define gdAlphaOpaque 0 -#define gdAlphaTransparent 127 -#define gdRedMax 255 -#define gdGreenMax 255 -#define gdBlueMax 255 -#define gdTrueColorGetAlpha(c) (((c) & 0x7F000000) >> 24) -#define gdTrueColorGetRed(c) (((c) & 0xFF0000) >> 16) -#define gdTrueColorGetGreen(c) (((c) & 0x00FF00) >> 8) -#define gdTrueColorGetBlue(c) ((c) & 0x0000FF) - -/* This function accepts truecolor pixel values only. The - source color is composited with the destination color - based on the alpha channel value of the source color. - The resulting color is opaque. */ - -int gdAlphaBlend(int dest, int src); - -typedef struct gdImageStruct { - /* Palette-based image pixels */ - unsigned char ** pixels; - int sx; - int sy; - /* These are valid in palette images only. See also - 'alpha', which appears later in the structure to - preserve binary backwards compatibility */ - int colorsTotal; - int red[gdMaxColors]; - int green[gdMaxColors]; - int blue[gdMaxColors]; - int open[gdMaxColors]; - /* For backwards compatibility, this is set to the - first palette entry with 100% transparency, - and is also set and reset by the - gdImageColorTransparent function. Newer - applications can allocate palette entries - with any desired level of transparency; however, - bear in mind that many viewers, notably - many web browsers, fail to implement - full alpha channel for PNG and provide - support for full opacity or transparency only. */ - int transparent; - int *polyInts; - int polyAllocated; - struct gdImageStruct *brush; - struct gdImageStruct *tile; - int brushColorMap[gdMaxColors]; - int tileColorMap[gdMaxColors]; - int styleLength; - int stylePos; - int *style; - int interlace; - /* New in 2.0: thickness of line. Initialized to 1. */ - int thick; - /* New in 2.0: alpha channel for palettes. Note that only - Macintosh Internet Explorer and (possibly) Netscape 6 - really support multiple levels of transparency in - palettes, to my knowledge, as of 2/15/01. Most - common browsers will display 100% opaque and - 100% transparent correctly, and do something - unpredictable and/or undesirable for levels - in between. TBB */ - int alpha[gdMaxColors]; - /* Truecolor flag and pixels. New 2.0 fields appear here at the - end to minimize breakage of existing object code. */ - int trueColor; - int ** tpixels; - /* Should alpha channel be copied, or applied, each time a - pixel is drawn? This applies to truecolor images only. - No attempt is made to alpha-blend in palette images, - even if semitransparent palette entries exist. - To do that, build your image as a truecolor image, - then quantize down to 8 bits. */ - int alphaBlendingFlag; - /* Should the alpha channel of the image be saved? This affects - PNG at the moment; other future formats may also - have that capability. JPEG doesn't. */ - int saveAlphaFlag; -} gdImage; - -typedef gdImage * gdImagePtr; - -typedef struct { - /* # of characters in font */ - int nchars; - /* First character is numbered... (usually 32 = space) */ - int offset; - /* Character width and height */ - int w; - int h; - /* Font data; array of characters, one row after another. - Easily included in code, also easily loaded from - data files. */ - char *data; -} gdFont; - -/* Text functions take these. */ -typedef gdFont *gdFontPtr; - -/* For backwards compatibility only. Use gdImageSetStyle() - for MUCH more flexible line drawing. Also see - gdImageSetBrush(). */ -#define gdDashSize 4 - -/* Special colors. */ - -#define gdStyled (-2) -#define gdBrushed (-3) -#define gdStyledBrushed (-4) -#define gdTiled (-5) - -/* NOT the same as the transparent color index. - This is used in line styles only. */ -#define gdTransparent (-6) - -/* Functions to manipulate images. */ - -/* Creates a palette-based image (up to 256 colors). */ -gdImagePtr gdImageCreate(int sx, int sy); - -/* An alternate name for the above (2.0). */ -#define gdImageCreatePalette gdImageCreate - -/* Creates a truecolor image (millions of colors). */ -gdImagePtr gdImageCreateTrueColor(int sx, int sy); - -/* Creates an image from various file types. These functions - return a palette or truecolor image based on the - nature of the file being loaded. Truecolor PNG - stays truecolor; palette PNG stays palette-based; - JPEG is always truecolor. */ -gdImagePtr gdImageCreateFromPng(FILE *fd); -gdImagePtr gdImageCreateFromPngCtx(gdIOCtxPtr in); -gdImagePtr gdImageCreateFromWBMP(FILE *inFile); -gdImagePtr gdImageCreateFromWBMPCtx(gdIOCtx *infile); -gdImagePtr gdImageCreateFromJpeg(FILE *infile); -gdImagePtr gdImageCreateFromJpegCtx(gdIOCtx *infile); - -/* A custom data source. */ -/* The source function must return -1 on error, otherwise the number - of bytes fetched. 0 is EOF, not an error! */ -/* context will be passed to your source function. */ - -typedef struct { - int (*source) (void *context, char *buffer, int len); - void *context; -} gdSource, *gdSourcePtr; - -gdImagePtr gdImageCreateFromPngSource(gdSourcePtr in); - -gdImagePtr gdImageCreateFromGd(FILE *in); -gdImagePtr gdImageCreateFromGdCtx(gdIOCtxPtr in); - -gdImagePtr gdImageCreateFromGd2(FILE *in); -gdImagePtr gdImageCreateFromGd2Ctx(gdIOCtxPtr in); - -gdImagePtr gdImageCreateFromGd2Part(FILE *in, int srcx, int srcy, int w, int h); -gdImagePtr gdImageCreateFromGd2PartCtx(gdIOCtxPtr in, int srcx, int srcy, int w, int h); - -gdImagePtr gdImageCreateFromXbm(FILE *fd); - -void gdImageDestroy(gdImagePtr im); - -/* Replaces or blends with the background depending on the - most recent call to gdImageAlphaBlending and the - alpha channel value of 'color'; default is to overwrite. - Tiling and line styling are also implemented - here. All other gd drawing functions pass through this call, - allowing for many useful effects. */ - -void gdImageSetPixel(gdImagePtr im, int x, int y, int color); - -int gdImageGetPixel(gdImagePtr im, int x, int y); - -void gdImageLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color); - -/* For backwards compatibility only. Use gdImageSetStyle() - for much more flexible line drawing. */ -void gdImageDashedLine(gdImagePtr im, int x1, int y1, int x2, int y2, int color); -/* Corners specified (not width and height). Upper left first, lower right - second. */ -void gdImageRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, int color); -/* Solid bar. Upper left corner first, lower right corner second. */ -void gdImageFilledRectangle(gdImagePtr im, int x1, int y1, int x2, int y2, int color); -int gdImageBoundsSafe(gdImagePtr im, int x, int y); -void gdImageChar(gdImagePtr im, gdFontPtr f, int x, int y, int c, int color); -void gdImageCharUp(gdImagePtr im, gdFontPtr f, int x, int y, int c, int color); -void gdImageString(gdImagePtr im, gdFontPtr f, int x, int y, unsigned char *s, int color); -void gdImageStringUp(gdImagePtr im, gdFontPtr f, int x, int y, unsigned char *s, int color); -void gdImageString16(gdImagePtr im, gdFontPtr f, int x, int y, unsigned short *s, int color); -void gdImageStringUp16(gdImagePtr im, gdFontPtr f, int x, int y, unsigned short *s, int color); - -/* Calls gdImageStringFT. Provided for backwards compatibility only. */ -char *gdImageStringTTF(gdImage *im, int *brect, int fg, char *fontlist, - double ptsize, double angle, int x, int y, char *string); - -/* FreeType 2 text output */ -char *gdImageStringFT(gdImage *im, int *brect, int fg, char *fontlist, - double ptsize, double angle, int x, int y, char *string); - -typedef struct { - int flags; /* for future expansion logical OR of gdFTEX_ values */ - double linespacing; /* fine tune line spacing for '\n' */ -} gdFTStringExtra, *gdFTStringExtraPtr; -#define gdFTEX_LINESPACE 1 - -/* FreeType 2 text output with fine tuning */ -char * -gdImageStringFTEx(gdImage * im, int *brect, int fg, char * fontlist, - double ptsize, double angle, int x, int y, char * string, - gdFTStringExtraPtr strex); - - -/* Point type for use in polygon drawing. */ -typedef struct { - int x, y; -} gdPoint, *gdPointPtr; - -void gdImagePolygon(gdImagePtr im, gdPointPtr p, int n, int c); -void gdImageFilledPolygon(gdImagePtr im, gdPointPtr p, int n, int c); - -/* These functions still work with truecolor images, - for which they never return error. */ -int gdImageColorAllocate(gdImagePtr im, int r, int g, int b); -/* gd 2.0: palette entries with non-opaque transparency are permitted. */ -int gdImageColorAllocateAlpha(gdImagePtr im, int r, int g, int b, int a); -/* Assumes opaque is the preferred alpha channel value */ -int gdImageColorClosest(gdImagePtr im, int r, int g, int b); -/* Closest match taking all four parameters into account. - A slightly different color with the same transparency - beats the exact same color with radically different - transparency */ -int gdImageColorClosestAlpha(gdImagePtr im, int r, int g, int b, int a); -/* Returns exact, 100% opaque matches only */ -int gdImageColorExact(gdImagePtr im, int r, int g, int b); -/* Returns an exact match only, including alpha */ -int gdImageColorExactAlpha(gdImagePtr im, int r, int g, int b, int a); -/* Opaque only */ -int gdImageColorResolve(gdImagePtr im, int r, int g, int b); -/* Based on gdImageColorExactAlpha and gdImageColorClosestAlpha */ -int gdImageColorResolveAlpha(gdImagePtr im, int r, int g, int b, int a); - -/* A simpler way to obtain an opaque truecolor value for drawing on a - truecolor image. Not for use with palette images! */ - -#define gdTrueColor(r, g, b) (((r) << 16) + \ - ((g) << 8) + \ - (b)) - -/* Returns a truecolor value with an alpha channel component. - gdAlphaMax (127, **NOT 255**) is transparent, 0 is completely - opaque. */ - -#define gdTrueColorAlpha(r, g, b, a) (((a) << 24) + \ - ((r) << 16) + \ - ((g) << 8) + \ - (b)) - -void gdImageColorDeallocate(gdImagePtr im, int color); - -/* Converts a truecolor image to a palette-based image, - using a high-quality two-pass quantization routine - which attempts to preserve alpha channel information - as well as R/G/B color information when creating - a palette. If ditherFlag is set, the image will be - dithered to approximate colors better, at the expense - of some obvious "speckling." colorsWanted can be - anything up to 256. If the original source image - includes photographic information or anything that - came out of a JPEG, 256 is strongly recommended. - - Better yet, don't use this function -- write real - truecolor PNGs and JPEGs. The disk space gain of - conversion to palette is not great (for small images - it can be negative) and the quality loss is ugly. */ - -void gdImageTrueColorToPalette(gdImagePtr im, int ditherFlag, int colorsWanted); - -/* Specifies a color index (if a palette image) or an - RGB color (if a truecolor image) which should be - considered 100% transparent. FOR TRUECOLOR IMAGES, - THIS IS IGNORED IF AN ALPHA CHANNEL IS BEING - SAVED. Use gdImageSaveAlpha(im, 0); to - turn off the saving of a full alpha channel in - a truecolor image. Note that gdImageColorTransparent - is usually compatible with older browsers that - do not understand full alpha channels well. TBB */ -void gdImageColorTransparent(gdImagePtr im, int color); - -void gdImagePaletteCopy(gdImagePtr dst, gdImagePtr src); -void gdImagePng(gdImagePtr im, FILE *out); -void gdImagePngCtx(gdImagePtr im, gdIOCtx *out); - -void gdImageWBMP(gdImagePtr image, int fg, FILE *out); -void gdImageWBMPCtx(gdImagePtr image, int fg, gdIOCtx *out); - -/* Guaranteed to correctly free memory returned - by the gdImage*Ptr functions */ -void gdFree(void *m); - -/* Best to free this memory with gdFree(), not free() */ -void *gdImageWBMPPtr(gdImagePtr im, int *size, int fg); - -void gdImageJpeg(gdImagePtr im, FILE *out, int quality); -void gdImageJpegCtx(gdImagePtr im, gdIOCtx *out, int quality); - -/* Best to free this memory with gdFree(), not free() */ -void *gdImageJpegPtr(gdImagePtr im, int *size, int quality); - -/* A custom data sink. For backwards compatibility. Use - gdIOCtx instead. */ -/* The sink function must return -1 on error, otherwise the number - of bytes written, which must be equal to len. */ -/* context will be passed to your sink function. */ -typedef struct { - int (*sink) (void *context, const char *buffer, int len); - void *context; -} gdSink, *gdSinkPtr; - -void gdImagePngToSink(gdImagePtr im, gdSinkPtr out); - -void gdImageGd(gdImagePtr im, FILE *out); -void gdImageGd2(gdImagePtr im, FILE *out, int cs, int fmt); - -/* Best to free this memory with gdFree(), not free() */ -void* gdImagePngPtr(gdImagePtr im, int *size); - -/* Best to free this memory with gdFree(), not free() */ -void* gdImageGdPtr(gdImagePtr im, int *size); - -/* Best to free this memory with gdFree(), not free() */ -void* gdImageGd2Ptr(gdImagePtr im, int cs, int fmt, int *size); - -void gdImageEllipse(gdImagePtr im, int cx, int cy, int w, int h, int color); - -/* Style is a bitwise OR ( | operator ) of these. - gdArc and gdChord are mutually exclusive; - gdChord just connects the starting and ending - angles with a straight line, while gdArc produces - a rounded edge. gdPie is a synonym for gdArc. - gdNoFill indicates that the arc or chord should be - outlined, not filled. gdEdged, used together with - gdNoFill, indicates that the beginning and ending - angles should be connected to the center; this is - a good way to outline (rather than fill) a - 'pie slice'. */ -#define gdArc 0 -#define gdPie gdArc -#define gdChord 1 -#define gdNoFill 2 -#define gdEdged 4 - -void gdImageFilledArc(gdImagePtr im, int cx, int cy, int w, int h, int s, int e, int color, int style); -void gdImageArc(gdImagePtr im, int cx, int cy, int w, int h, int s, int e, int color); -void gdImageFilledEllipse(gdImagePtr im, int cx, int cy, int w, int h, int color); -void gdImageFillToBorder(gdImagePtr im, int x, int y, int border, int color); -void gdImageFill(gdImagePtr im, int x, int y, int color); -void gdImageCopy(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int w, int h); -void gdImageCopyMerge(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, - int srcX, int srcY, int w, int h, int pct); -void gdImageCopyMergeGray(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, - int srcX, int srcY, int w, int h, int pct); - -/* Stretches or shrinks to fit, as needed. Does NOT attempt - to average the entire set of source pixels that scale down onto the - destination pixel. */ -void gdImageCopyResized(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH); - -/* gd 2.0: stretches or shrinks to fit, as needed. When called with a - truecolor destination image, this function averages the - entire set of source pixels that scale down onto the - destination pixel, taking into account what portion of the - destination pixel each source pixel represents. This is a - floating point operation, but this is not a performance issue - on modern hardware, except for some embedded devices. If the - destination is a palette image, gdImageCopyResized is - substituted automatically. */ -void gdImageCopyResampled(gdImagePtr dst, gdImagePtr src, int dstX, int dstY, int srcX, int srcY, int dstW, int dstH, int srcW, int srcH); - -void gdImageSetBrush(gdImagePtr im, gdImagePtr brush); -void gdImageSetTile(gdImagePtr im, gdImagePtr tile); -void gdImageSetStyle(gdImagePtr im, int *style, int noOfPixels); -/* Line thickness (defaults to 1). Affects lines, ellipses, - rectangles, polygons and so forth. */ -void gdImageSetThickness(gdImagePtr im, int thickness); -/* On or off (1 or 0) for all three of these. */ -void gdImageInterlace(gdImagePtr im, int interlaceArg); -void gdImageAlphaBlending(gdImagePtr im, int alphaBlendingArg); -void gdImageSaveAlpha(gdImagePtr im, int saveAlphaArg); - -/* Macros to access information about images. */ - -/* Returns nonzero if the image is a truecolor image, - zero for a palette image. */ - -#define gdImageTrueColor(im) ((im)->trueColor) - -#define gdImageSX(im) ((im)->sx) -#define gdImageSY(im) ((im)->sy) -#define gdImageColorsTotal(im) ((im)->colorsTotal) -#define gdImageRed(im, c) ((im)->trueColor ? gdTrueColorGetRed(c) : \ - (im)->red[(c)]) -#define gdImageGreen(im, c) ((im)->trueColor ? gdTrueColorGetGreen(c) : \ - (im)->green[(c)]) -#define gdImageBlue(im, c) ((im)->trueColor ? gdTrueColorGetBlue(c) : \ - (im)->blue[(c)]) -#define gdImageAlpha(im, c) ((im)->trueColor ? gdTrueColorGetAlpha(c) : \ - (im)->alpha[(c)]) -#define gdImageGetTransparent(im) ((im)->transparent) -#define gdImageGetInterlaced(im) ((im)->interlace) - -/* These macros provide direct access to pixels in - palette-based and truecolor images, respectively. - If you use these macros, you must perform your own - bounds checking. Use of the macro for the correct type - of image is also your responsibility. */ -#define gdImagePalettePixel(im, x, y) (im)->pixels[(y)][(x)] -#define gdImageTrueColorPixel(im, x, y) (im)->tpixels[(y)][(x)] - -/* I/O Support routines. */ - -gdIOCtx* gdNewFileCtx(FILE*); -gdIOCtx* gdNewDynamicCtx(int, void*); -gdIOCtx* gdNewSSCtx(gdSourcePtr in, gdSinkPtr out); -void* gdDPExtractData(struct gdIOCtx* ctx, int *size); - -#define GD2_CHUNKSIZE 128 -#define GD2_CHUNKSIZE_MIN 64 -#define GD2_CHUNKSIZE_MAX 4096 - -#define GD2_VERS 2 -#define GD2_ID "gd2" -#define GD2_FMT_RAW 1 -#define GD2_FMT_COMPRESSED 2 - -/* Image comparison definitions */ -int gdImageCompare(gdImagePtr im1, gdImagePtr im2); - -#define GD_CMP_IMAGE 1 /* Actual image IS different */ -#define GD_CMP_NUM_COLORS 2 /* Number of Colours in pallette differ */ -#define GD_CMP_COLOR 4 /* Image colours differ */ -#define GD_CMP_SIZE_X 8 /* Image width differs */ -#define GD_CMP_SIZE_Y 16 /* Image heights differ */ -#define GD_CMP_TRANSPARENT 32 /* Transparent colour */ -#define GD_CMP_BACKGROUND 64 /* Background colour */ -#define GD_CMP_INTERLACE 128 /* Interlaced setting */ -#define GD_CMP_TRUECOLOR 256 /* Truecolor vs palette differs */ - -/* resolution affects ttf font rendering, particularly hinting */ -#define GD_RESOLUTION 96 /* pixels per inch */ - -#ifdef __cplusplus -} -#endif - -#endif /* GD_H */ |