diff options
Diffstat (limited to 'xc/extras/Mesa/src/texformat.h')
| -rw-r--r-- | xc/extras/Mesa/src/texformat.h | 76 |
1 files changed, 63 insertions, 13 deletions
diff --git a/xc/extras/Mesa/src/texformat.h b/xc/extras/Mesa/src/texformat.h index 8f5e7de75..72b473cdf 100644 --- a/xc/extras/Mesa/src/texformat.h +++ b/xc/extras/Mesa/src/texformat.h @@ -1,9 +1,9 @@ /* * Mesa 3-D graphics library - * Version: 3.4 + * Version: 3.5 * - * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -29,19 +29,28 @@ #ifndef TEXFORMAT_H #define TEXFORMAT_H -#include "types.h" +#include "mtypes.h" /* The Mesa internal texture image types. These will be set to their * default value, but may be changed by drivers as required. */ +enum _format { + /* Hardware-friendly formats. Drivers can override the default + * formats and convert texture images to one of these as required. + * These formats are all little endian, as shown below. They will be + * most useful for x86-based PC graphics card drivers. + * + * NOTE: In the default case, some of these formats will be + * duplicates of the default formats listed above. However, these + * formats guarantee their internal component sizes, while GLchan may + * vary betwen GLubyte, GLushort and GLfloat. + */ /* msb <------ TEXEL BITS -----------> lsb */ -enum _format { /* ---- ---- ---- ---- ---- ---- ---- ---- */ + /* ---- ---- ---- ---- ---- ---- ---- ---- */ MESA_FORMAT_RGBA8888, /* RRRR RRRR GGGG GGGG BBBB BBBB AAAA AAAA */ - MESA_FORMAT_ABGR8888, /* AAAA AAAA BBBB BBBB GGGG GGGG RRRR RRRR */ MESA_FORMAT_ARGB8888, /* AAAA AAAA RRRR RRRR GGGG GGGG BBBB BBBB */ MESA_FORMAT_RGB888, /* RRRR RRRR GGGG GGGG BBBB BBBB */ - MESA_FORMAT_BGR888, /* BBBB BBBB GGGG GGGG RRRR RRRR */ MESA_FORMAT_RGB565, /* RRRR RGGG GGGB BBBB */ MESA_FORMAT_ARGB4444, /* AAAA RRRR GGGG BBBB */ MESA_FORMAT_ARGB1555, /* ARRR RRGG GGGB BBBB */ @@ -50,21 +59,60 @@ enum _format { /* ---- ---- ---- ---- ---- ---- ---- ---- */ MESA_FORMAT_A8, /* AAAA AAAA */ MESA_FORMAT_L8, /* LLLL LLLL */ MESA_FORMAT_I8, /* IIII IIII */ - MESA_FORMAT_CI8 /* CCCC CCCC */ + MESA_FORMAT_CI8, /* CCCC CCCC */ + + /* Generic GLchan-based formats. These are the default formats used + * by the software rasterizer and, unless the driver overrides the + * texture image functions, incoming images will be converted to one + * of these formats. Components are arrays of GLchan values, so + * there will be no big/little endian issues. + * + * NOTE: Because these are based on the GLchan datatype, one cannot + * assume 8 bits per channel with these formats. If you require + * GLubyte per channel, use one of the hardware formats above. + */ + MESA_FORMAT_RGBA, + MESA_FORMAT_RGB, + MESA_FORMAT_ALPHA, + MESA_FORMAT_LUMINANCE, + MESA_FORMAT_LUMINANCE_ALPHA, + MESA_FORMAT_INTENSITY, + MESA_FORMAT_COLOR_INDEX, + MESA_FORMAT_DEPTH_COMPONENT }; -extern void -_mesa_init_texture_format( GLcontext *ctx, - struct gl_texture_image *texImage, - GLenum internalFormat ); +extern GLboolean +_mesa_is_hardware_tex_format( const struct gl_texture_format *format ); + +extern const struct gl_texture_format * +_mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat, + GLenum format, GLenum type ); + +extern GLint +_mesa_base_compressed_texformat(GLcontext *ctx, GLint intFormat); + +extern GLint +_mesa_compressed_texture_size(GLcontext *ctx, + const struct gl_texture_image *texImage); +/* The default formats, GLchan per component: + */ +extern const struct gl_texture_format _mesa_texformat_rgba; +extern const struct gl_texture_format _mesa_texformat_rgb; +extern const struct gl_texture_format _mesa_texformat_alpha; +extern const struct gl_texture_format _mesa_texformat_luminance; +extern const struct gl_texture_format _mesa_texformat_luminance_alpha; +extern const struct gl_texture_format _mesa_texformat_intensity; +extern const struct gl_texture_format _mesa_texformat_color_index; +extern const struct gl_texture_format _mesa_texformat_depth_component; + +/* The hardware-friendly formats: + */ extern const struct gl_texture_format _mesa_texformat_rgba8888; -extern const struct gl_texture_format _mesa_texformat_abgr8888; extern const struct gl_texture_format _mesa_texformat_argb8888; extern const struct gl_texture_format _mesa_texformat_rgb888; -extern const struct gl_texture_format _mesa_texformat_bgr888; extern const struct gl_texture_format _mesa_texformat_rgb565; extern const struct gl_texture_format _mesa_texformat_argb4444; extern const struct gl_texture_format _mesa_texformat_argb1555; @@ -75,6 +123,8 @@ extern const struct gl_texture_format _mesa_texformat_l8; extern const struct gl_texture_format _mesa_texformat_i8; extern const struct gl_texture_format _mesa_texformat_ci8; +/* The null format: + */ extern const struct gl_texture_format _mesa_null_texformat; #endif |