src/mesa/main/texformat.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.1
   4  *
   5  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
   6  * Copyright (c) 2008 VMware, Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * \file texformat.h
  29  * Texture formats definitions.
  30  *
  31  * \author Gareth Hughes
  32  */
  33
  34
  35 #ifndef TEXFORMAT_H
  36 #define TEXFORMAT_H
  37
  38
  39 #include "mtypes.h"
  40
  41
  42 /**
  43  * Mesa internal texture image formats.
  44  * All texture images are stored in one of these formats.
  45  *
  46  * NOTE: when you add a new format, be sure to update the do_row()
  47  * function in texstore.c used for auto mipmap generation.
  48  */
  49 enum _format {
  50    /**
  51     * \name Hardware-friendly formats.
  52     *
  53     * Drivers can override the default formats and convert texture images to
  54     * one of these as required.  The driver's
  55     * dd_function_table::ChooseTextureFormat function will choose one of these
  56     * formats.
  57     *
  58     * \note In the default case, some of these formats will be duplicates of
  59     * the generic formats listed below.  However, these formats guarantee their
  60     * internal component sizes, while GLchan may vary between GLubyte, GLushort
  61     * and GLfloat.
  62     */
  63    /*@{*/
  64                                 /* msb <------ TEXEL BITS -----------> lsb */
  65                                 /* ---- ---- ---- ---- ---- ---- ---- ---- */
  66    MESA_FORMAT_RGBA8888,        /* RRRR RRRR GGGG GGGG BBBB BBBB AAAA AAAA */
  67    MESA_FORMAT_RGBA8888_REV,    /* AAAA AAAA BBBB BBBB GGGG GGGG RRRR RRRR */
  68    MESA_FORMAT_ARGB8888,        /* AAAA AAAA RRRR RRRR GGGG GGGG BBBB BBBB */
  69    MESA_FORMAT_ARGB8888_REV,    /* BBBB BBBB GGGG GGGG RRRR RRRR AAAA AAAA */
  70    MESA_FORMAT_RGB888,          /*           RRRR RRRR GGGG GGGG BBBB BBBB */
  71    MESA_FORMAT_BGR888,          /*           BBBB BBBB GGGG GGGG RRRR RRRR */
  72    MESA_FORMAT_RGB565,          /*                     RRRR RGGG GGGB BBBB */
  73    MESA_FORMAT_RGB565_REV,      /*                     GGGB BBBB RRRR RGGG */
  74    MESA_FORMAT_RGBA4444,        /*                     RRRR GGGG BBBB AAAA */
  75    MESA_FORMAT_ARGB4444,        /*                     AAAA RRRR GGGG BBBB */
  76    MESA_FORMAT_ARGB4444_REV,    /*                     GGGG BBBB AAAA RRRR */
  77    MESA_FORMAT_RGBA5551,        /*                     RRRR RGGG GGBB BBBA */
  78    MESA_FORMAT_ARGB1555,        /*                     ARRR RRGG GGGB BBBB */
  79    MESA_FORMAT_ARGB1555_REV,    /*                     GGGB BBBB ARRR RRGG */
  80    MESA_FORMAT_AL88,            /*                     AAAA AAAA LLLL LLLL */
  81    MESA_FORMAT_AL88_REV,        /*                     LLLL LLLL AAAA AAAA */
  82    MESA_FORMAT_RGB332,          /*                               RRRG GGBB */
  83    MESA_FORMAT_A8,              /*                               AAAA AAAA */
  84    MESA_FORMAT_L8,              /*                               LLLL LLLL */
  85    MESA_FORMAT_I8,              /*                               IIII IIII */
  86    MESA_FORMAT_CI8,             /*                               CCCC CCCC */
  87    MESA_FORMAT_YCBCR,           /*                     YYYY YYYY UorV UorV */
  88    MESA_FORMAT_YCBCR_REV,       /*                     UorV UorV YYYY YYYY */
  89    MESA_FORMAT_Z24_S8,          /* ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ SSSS SSSS */
  90    MESA_FORMAT_S8_Z24,          /* SSSS SSSS ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ */
  91    MESA_FORMAT_Z16,             /*                     ZZZZ ZZZZ ZZZZ ZZZZ */
  92    MESA_FORMAT_Z32,             /* ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ ZZZZ */
  93    /*@}*/
  94
  95 #if FEATURE_EXT_texture_sRGB
  96    /**
  97     * \name 8-bit/channel sRGB formats
  98     */
  99    /*@{*/
 100    MESA_FORMAT_SRGB8,
 101    MESA_FORMAT_SRGBA8,
 102    MESA_FORMAT_SARGB8,
 103    MESA_FORMAT_SL8,
 104    MESA_FORMAT_SLA8,
 105 #if FEATURE_texture_s3tc
 106    MESA_FORMAT_SRGB_DXT1,
 107    MESA_FORMAT_SRGBA_DXT1,
 108    MESA_FORMAT_SRGBA_DXT3,
 109    MESA_FORMAT_SRGBA_DXT5,
 110 #endif
 111    /*@}*/
 112 #endif
 113
 114    /**
 115     * \name Compressed texture formats.
 116     */
 117    /*@{*/
 118 #if FEATURE_texture_fxt1
 119    MESA_FORMAT_RGB_FXT1,
 120    MESA_FORMAT_RGBA_FXT1,
 121 #endif
 122 #if FEATURE_texture_s3tc
 123    MESA_FORMAT_RGB_DXT1,
 124    MESA_FORMAT_RGBA_DXT1,
 125    MESA_FORMAT_RGBA_DXT3,
 126    MESA_FORMAT_RGBA_DXT5,
 127 #endif
 128    /*@}*/
 129
 130    /**
 131     * \name Generic GLchan-based formats.
 132     *
 133     * Software-oriented texture formats.  Texels are arrays of GLchan
 134     * values so there are no byte order issues.
 135     *
 136     * \note Because these are based on the GLchan data type, one cannot assume
 137     * 8 bits per channel with these formats.  If you require GLubyte channels,
 138     * use one of the hardware formats above.
 139     */
 140    /*@{*/
 141    MESA_FORMAT_RGBA,
 142    MESA_FORMAT_RGB,
 143    MESA_FORMAT_ALPHA,
 144    MESA_FORMAT_LUMINANCE,
 145    MESA_FORMAT_LUMINANCE_ALPHA,
 146    MESA_FORMAT_INTENSITY,
 147    /*@}*/
 148
 149    /**
 150     * \name Floating point texture formats.
 151     */
 152    /*@{*/
 153    MESA_FORMAT_RGBA_FLOAT32,
 154    MESA_FORMAT_RGBA_FLOAT16,
 155    MESA_FORMAT_RGB_FLOAT32,
 156    MESA_FORMAT_RGB_FLOAT16,
 157    MESA_FORMAT_ALPHA_FLOAT32,
 158    MESA_FORMAT_ALPHA_FLOAT16,
 159    MESA_FORMAT_LUMINANCE_FLOAT32,
 160    MESA_FORMAT_LUMINANCE_FLOAT16,
 161    MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 162    MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 163    MESA_FORMAT_INTENSITY_FLOAT32,
 164    MESA_FORMAT_INTENSITY_FLOAT16,
 165    /*@}*/
 166
 167    /**
 168     * \name Signed fixed point texture formats.
 169     */
 170    /*@{*/
 171    MESA_FORMAT_DUDV8,
 172    MESA_FORMAT_SIGNED_RGBA8888,
 173    MESA_FORMAT_SIGNED_RGBA8888_REV
 174    /*@}*/
 175 };
 176
 177
 178 /** GLchan-valued formats */
 179 /*@{*/
 180 extern const struct gl_texture_format _mesa_texformat_rgba;
 181 extern const struct gl_texture_format _mesa_texformat_rgb;
 182 extern const struct gl_texture_format _mesa_texformat_alpha;
 183 extern const struct gl_texture_format _mesa_texformat_luminance;
 184 extern const struct gl_texture_format _mesa_texformat_luminance_alpha;
 185 extern const struct gl_texture_format _mesa_texformat_intensity;
 186 /*@}*/
 187
 188 #if FEATURE_EXT_texture_sRGB
 189 /** sRGB (nonlinear) formats */
 190 /*@{*/
 191 extern const struct gl_texture_format _mesa_texformat_srgb8;
 192 extern const struct gl_texture_format _mesa_texformat_srgba8;
 193 extern const struct gl_texture_format _mesa_texformat_sargb8;
 194 extern const struct gl_texture_format _mesa_texformat_sl8;
 195 extern const struct gl_texture_format _mesa_texformat_sla8;
 196 #if FEATURE_texture_s3tc
 197 extern const struct gl_texture_format _mesa_texformat_srgb_dxt1;
 198 extern const struct gl_texture_format _mesa_texformat_srgba_dxt1;
 199 extern const struct gl_texture_format _mesa_texformat_srgba_dxt3;
 200 extern const struct gl_texture_format _mesa_texformat_srgba_dxt5;
 201 #endif
 202 /*@}*/
 203 #endif
 204
 205 /** Floating point texture formats */
 206 /*@{*/
 207 extern const struct gl_texture_format _mesa_texformat_rgba_float32;
 208 extern const struct gl_texture_format _mesa_texformat_rgba_float16;
 209 extern const struct gl_texture_format _mesa_texformat_rgb_float32;
 210 extern const struct gl_texture_format _mesa_texformat_rgb_float16;
 211 extern const struct gl_texture_format _mesa_texformat_alpha_float32;
 212 extern const struct gl_texture_format _mesa_texformat_alpha_float16;
 213 extern const struct gl_texture_format _mesa_texformat_luminance_float32;
 214 extern const struct gl_texture_format _mesa_texformat_luminance_float16;
 215 extern const struct gl_texture_format _mesa_texformat_luminance_alpha_float32;
 216 extern const struct gl_texture_format _mesa_texformat_luminance_alpha_float16;
 217 extern const struct gl_texture_format _mesa_texformat_intensity_float32;
 218 extern const struct gl_texture_format _mesa_texformat_intensity_float16;
 219 /*@}*/
 220
 221 /** Signed fixed point texture formats */
 222 /*@{*/
 223 extern const struct gl_texture_format _mesa_texformat_dudv8;
 224 extern const struct gl_texture_format _mesa_texformat_signed_rgba8888;
 225 extern const struct gl_texture_format _mesa_texformat_signed_rgba8888_rev;
 226 /*@}*/
 227
 228 /** \name Assorted hardware-friendly formats */
 229 /*@{*/
 230 extern const struct gl_texture_format _mesa_texformat_rgba8888;
 231 extern const struct gl_texture_format _mesa_texformat_rgba8888_rev;
 232 extern const struct gl_texture_format _mesa_texformat_argb8888;
 233 extern const struct gl_texture_format _mesa_texformat_argb8888_rev;
 234 extern const struct gl_texture_format _mesa_texformat_rgb888;
 235 extern const struct gl_texture_format _mesa_texformat_bgr888;
 236 extern const struct gl_texture_format _mesa_texformat_rgb565;
 237 extern const struct gl_texture_format _mesa_texformat_rgb565_rev;
 238 extern const struct gl_texture_format _mesa_texformat_rgba4444;
 239 extern const struct gl_texture_format _mesa_texformat_argb4444;
 240 extern const struct gl_texture_format _mesa_texformat_argb4444_rev;
 241 extern const struct gl_texture_format _mesa_texformat_argb1555;
 242 extern const struct gl_texture_format _mesa_texformat_argb1555_rev;
 243 extern const struct gl_texture_format _mesa_texformat_rgba5551;
 244 extern const struct gl_texture_format _mesa_texformat_al88;
 245 extern const struct gl_texture_format _mesa_texformat_al88_rev;
 246 extern const struct gl_texture_format _mesa_texformat_rgb332;
 247 extern const struct gl_texture_format _mesa_texformat_a8;
 248 extern const struct gl_texture_format _mesa_texformat_l8;
 249 extern const struct gl_texture_format _mesa_texformat_i8;
 250 extern const struct gl_texture_format _mesa_texformat_ci8;
 251 extern const struct gl_texture_format _mesa_texformat_z24_s8;
 252 extern const struct gl_texture_format _mesa_texformat_s8_z24;
 253 extern const struct gl_texture_format _mesa_texformat_z16;
 254 extern const struct gl_texture_format _mesa_texformat_z32;
 255 /*@}*/
 256
 257 /** \name YCbCr formats */
 258 /*@{*/
 259 extern const struct gl_texture_format _mesa_texformat_ycbcr;
 260 extern const struct gl_texture_format _mesa_texformat_ycbcr_rev;
 261 /*@}*/
 262
 263 /** \name Compressed formats */
 264 /*@{*/
 265 #if FEATURE_texture_fxt1
 266 extern const struct gl_texture_format _mesa_texformat_rgb_fxt1;
 267 extern const struct gl_texture_format _mesa_texformat_rgba_fxt1;
 268 #endif
 269 #if FEATURE_texture_s3tc
 270 extern const struct gl_texture_format _mesa_texformat_rgb_dxt1;
 271 extern const struct gl_texture_format _mesa_texformat_rgba_dxt1;
 272 extern const struct gl_texture_format _mesa_texformat_rgba_dxt3;
 273 extern const struct gl_texture_format _mesa_texformat_rgba_dxt5;
 274 #endif
 275 /*@}*/
 276
 277 /** \name The null format */
 278 /*@{*/
 279 extern const struct gl_texture_format _mesa_null_texformat;
 280 /*@}*/
 281
 282
 283 extern const struct gl_texture_format *
 284 _mesa_choose_tex_format( GLcontext *ctx, GLint internalFormat,
 285                          GLenum format, GLenum type );
 286
 287
 288 extern void
 289 _mesa_format_to_type_and_comps(const struct gl_texture_format *format,
 290                                GLenum *datatype, GLuint *comps);
 291
 292
 293 #endif