src/mesa/state_tracker/st_format.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * 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
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * Texture Image-related functions.
  31  * \author Brian Paul
  32  */
  33
  34 #include "main/imports.h"
  35 #include "main/context.h"
  36 #include "main/texstore.h"
  37 #include "main/texformat.h"
  38 #include "main/enums.h"
  39
  40 #include "pipe/p_context.h"
  41 #include "pipe/p_defines.h"
  42 #include "st_context.h"
  43 #include "st_format.h"
  44
  45
  46
  47 /*
  48  * XXX temporary here
  49  */
  50 const struct pipe_format_info *
  51 st_get_format_info(GLuint format)
  52 {
  53    static const struct pipe_format_info info[] = {
  54       {
  55          PIPE_FORMAT_U_R8_G8_B8_A8,  /* format */
  56          GL_RGBA,                    /* base_format */
  57          8, 8, 8, 8, 0, 0,           /* color bits */
  58          0, 0,                       /* depth, stencil */
  59          4                           /* size in bytes */
  60       },
  61       {
  62          PIPE_FORMAT_U_A8_R8_G8_B8,
  63          GL_RGBA,                    /* base_format */
  64          8, 8, 8, 8, 0, 0,           /* color bits */
  65          0, 0,                       /* depth, stencil */
  66          4                           /* size in bytes */
  67       },
  68       {
  69          PIPE_FORMAT_U_A1_R5_G5_B5,
  70          GL_RGBA,                    /* base_format */
  71          5, 5, 5, 1, 0, 0,           /* color bits */
  72          0, 0,                       /* depth, stencil */
  73          2                           /* size in bytes */
  74       },
  75       {
  76          PIPE_FORMAT_U_R5_G6_B5,
  77          GL_RGBA,                    /* base_format */
  78          5, 6, 5, 0, 0, 0,           /* color bits */
  79          0, 0,                       /* depth, stencil */
  80          2                           /* size in bytes */
  81       },
  82       /* XXX lots more */
  83       {
  84          PIPE_FORMAT_S8_Z24,
  85          GL_DEPTH_STENCIL_EXT,       /* base_format */
  86          0, 0, 0, 0, 0, 0,           /* color bits */
  87          24, 8,                      /* depth, stencil */
  88          4                           /* size in bytes */
  89       }
  90    };
  91    GLuint i;
  92
  93    for (i = 0; i < sizeof(info) / sizeof(info[0]); i++) {
  94       if (info[i].format == format)
  95          return info + i;
  96    }
  97    return NULL;
  98 }
  99
 100
 101 GLuint
 102 st_sizeof_format(GLuint pipeFormat)
 103 {
 104    const struct pipe_format_info *info = st_get_format_info(pipeFormat);
 105    assert(info);
 106    return info->size;
 107 }
 108
 109
 110 GLuint
 111 st_mesa_format_to_pipe_format(GLuint mesaFormat)
 112 {
 113    switch (mesaFormat) {
 114       /* fix this */
 115    case MESA_FORMAT_ARGB8888_REV:
 116    case MESA_FORMAT_ARGB8888:
 117       return PIPE_FORMAT_U_A8_R8_G8_B8;
 118    case MESA_FORMAT_AL88:
 119       return PIPE_FORMAT_U_A8_L8;
 120    case MESA_FORMAT_A8:
 121       return PIPE_FORMAT_U_A8;
 122    case MESA_FORMAT_L8:
 123       return PIPE_FORMAT_U_L8;
 124    case MESA_FORMAT_I8:
 125       return PIPE_FORMAT_U_I8;
 126    default:
 127       assert(0);
 128       return 0;
 129    }
 130 }
 131
 132
 133 /**
 134  * Search list of formats for first RGBA format.
 135  */
 136 static GLuint
 137 default_rgba_format(const GLuint formats[], GLuint num)
 138 {
 139    GLuint i;
 140    for (i = 0; i < num; i++) {
 141       if (formats[i] == PIPE_FORMAT_U_R8_G8_B8_A8 ||
 142           formats[i] == PIPE_FORMAT_U_A8_R8_G8_B8 ||
 143           formats[i] == PIPE_FORMAT_U_R5_G6_B5) {
 144          return formats[i];
 145       }
 146    }
 147    return PIPE_FORMAT_NONE;
 148 }
 149
 150
 151 /**
 152  * Search list of formats for first depth/Z format.
 153  */
 154 static GLuint
 155 default_depth_format(const GLuint formats[], GLuint num)
 156 {
 157    GLuint i;
 158    for (i = 0; i < num; i++) {
 159       if (formats[i] == PIPE_FORMAT_U_Z16 ||
 160           formats[i] == PIPE_FORMAT_U_Z32 ||
 161           formats[i] == PIPE_FORMAT_S8_Z24) {
 162          return formats[i];
 163       }
 164    }
 165    return PIPE_FORMAT_NONE;
 166 }
 167
 168
 169 /**
 170  * Choose the PIPE_FORMAT_ to use for storing a texture image based
 171  * on the user's internalFormat, format and type parameters.
 172  * We query the pipe device for a list of formats which it supports
 173  * and choose from them.
 174  * If we find a device that needs a more intricate selection mechanism,
 175  * this function _could_ get pushed down into the pipe device.
 176  *
 177  * Note: also used for glRenderbufferStorageEXT()
 178  *
 179  * Note: format and type may be GL_NONE (see renderbuffers)
 180  *
 181  * \return PIPE_FORMAT_NONE if error/problem.
 182  */
 183 GLuint
 184 st_choose_pipe_format(struct pipe_context *pipe, GLint internalFormat,
 185                       GLenum format, GLenum type)
 186 {
 187    const GLuint *supported;
 188    GLboolean allow[PIPE_FORMAT_COUNT];
 189    GLuint i, n;
 190
 191    /* query supported formats and fill in bool allow[] table */
 192    supported = pipe->supported_formats(pipe, &n);
 193    assert(n < PIPE_FORMAT_COUNT); /* sanity check */
 194    memset(allow, 0, sizeof(allow));
 195    for (i = 0; i < n; i++) {
 196       allow[supported[i]] = 1;
 197    }
 198
 199    switch (internalFormat) {
 200    case 4:
 201    case GL_RGBA:
 202    case GL_COMPRESSED_RGBA:
 203       if (format == GL_BGRA) {
 204          if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {
 205             if (allow[PIPE_FORMAT_U_A8_R8_G8_B8])
 206                return PIPE_FORMAT_U_A8_R8_G8_B8;
 207          }
 208          else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
 209             if (allow[PIPE_FORMAT_U_A4_R4_G4_B4])
 210                return PIPE_FORMAT_U_A4_R4_G4_B4;
 211          }
 212          else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
 213             if (allow[PIPE_FORMAT_U_A1_R5_G5_B5])
 214                return PIPE_FORMAT_U_A1_R5_G5_B5;
 215          }
 216       }
 217       return default_rgba_format(supported, n);
 218
 219    case 3:
 220    case GL_RGB:
 221    case GL_COMPRESSED_RGB:
 222       if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
 223          if (allow[PIPE_FORMAT_U_R5_G6_B5])
 224             return PIPE_FORMAT_U_R5_G6_B5;
 225       }
 226       return default_rgba_format(supported, n);
 227
 228    case GL_RGBA8:
 229    case GL_RGB10_A2:
 230    case GL_RGBA12:
 231    case GL_RGBA16:
 232       return default_rgba_format(supported, n);
 233
 234    case GL_RGBA4:
 235    case GL_RGBA2:
 236       if (allow[PIPE_FORMAT_U_A4_R4_G4_B4])
 237          return PIPE_FORMAT_U_A4_R4_G4_B4;
 238       return default_rgba_format(supported, n);
 239
 240    case GL_RGB5_A1:
 241       if (allow[PIPE_FORMAT_U_A1_R5_G5_B5])
 242          return PIPE_FORMAT_U_A1_R5_G5_B5;
 243       return default_rgba_format(supported, n);
 244
 245    case GL_RGB8:
 246    case GL_RGB10:
 247    case GL_RGB12:
 248    case GL_RGB16:
 249       return default_rgba_format(supported, n);
 250
 251    case GL_RGB5:
 252    case GL_RGB4:
 253    case GL_R3_G3_B2:
 254       if (allow[PIPE_FORMAT_U_A1_R5_G5_B5])
 255          return PIPE_FORMAT_U_A1_R5_G5_B5;
 256       return default_rgba_format(supported, n);
 257
 258    case GL_ALPHA:
 259    case GL_ALPHA4:
 260    case GL_ALPHA8:
 261    case GL_ALPHA12:
 262    case GL_ALPHA16:
 263    case GL_COMPRESSED_ALPHA:
 264       if (allow[PIPE_FORMAT_U_A8])
 265          return PIPE_FORMAT_U_A8;
 266       return default_rgba_format(supported, n);
 267
 268    case 1:
 269    case GL_LUMINANCE:
 270    case GL_LUMINANCE4:
 271    case GL_LUMINANCE8:
 272    case GL_LUMINANCE12:
 273    case GL_LUMINANCE16:
 274    case GL_COMPRESSED_LUMINANCE:
 275       if (allow[PIPE_FORMAT_U_A8])
 276          return PIPE_FORMAT_U_A8;
 277       return default_rgba_format(supported, n);
 278
 279    case 2:
 280    case GL_LUMINANCE_ALPHA:
 281    case GL_LUMINANCE4_ALPHA4:
 282    case GL_LUMINANCE6_ALPHA2:
 283    case GL_LUMINANCE8_ALPHA8:
 284    case GL_LUMINANCE12_ALPHA4:
 285    case GL_LUMINANCE12_ALPHA12:
 286    case GL_LUMINANCE16_ALPHA16:
 287    case GL_COMPRESSED_LUMINANCE_ALPHA:
 288       if (allow[PIPE_FORMAT_U_A8_L8])
 289          return PIPE_FORMAT_U_A8_L8;
 290       return default_rgba_format(supported, n);
 291
 292    case GL_INTENSITY:
 293    case GL_INTENSITY4:
 294    case GL_INTENSITY8:
 295    case GL_INTENSITY12:
 296    case GL_INTENSITY16:
 297    case GL_COMPRESSED_INTENSITY:
 298       if (allow[PIPE_FORMAT_U_I8])
 299          return PIPE_FORMAT_U_I8;
 300       return default_rgba_format(supported, n);
 301
 302    case GL_YCBCR_MESA:
 303       if (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE) {
 304          if (allow[PIPE_FORMAT_YCBCR])
 305             return PIPE_FORMAT_YCBCR;
 306       }
 307       else {
 308          if (allow[PIPE_FORMAT_YCBCR_REV])
 309             return PIPE_FORMAT_YCBCR_REV;
 310       }
 311       return PIPE_FORMAT_NONE;
 312
 313 #if 0
 314    case GL_COMPRESSED_RGB_FXT1_3DFX:
 315       return &_mesa_texformat_rgb_fxt1;
 316    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 317       return &_mesa_texformat_rgba_fxt1;
 318
 319    case GL_RGB_S3TC:
 320    case GL_RGB4_S3TC:
 321    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 322       return &_mesa_texformat_rgb_dxt1;
 323
 324    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 325       return &_mesa_texformat_rgba_dxt1;
 326
 327    case GL_RGBA_S3TC:
 328    case GL_RGBA4_S3TC:
 329    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 330       return &_mesa_texformat_rgba_dxt3;
 331
 332    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 333       return &_mesa_texformat_rgba_dxt5;
 334 #endif
 335
 336    case GL_DEPTH_COMPONENT16:
 337       if (allow[PIPE_FORMAT_U_Z16])
 338          return PIPE_FORMAT_U_Z16;
 339       /* fall-through */
 340    case GL_DEPTH_COMPONENT24:
 341       if (allow[PIPE_FORMAT_S8_Z24])
 342          return PIPE_FORMAT_S8_Z24;
 343       /* fall-through */
 344    case GL_DEPTH_COMPONENT32:
 345       if (allow[PIPE_FORMAT_U_Z32])
 346          return PIPE_FORMAT_U_Z32;
 347       /* fall-through */
 348    case GL_DEPTH_COMPONENT:
 349       return default_depth_format(supported, n);
 350
 351    case GL_STENCIL_INDEX:
 352    case GL_STENCIL_INDEX1_EXT:
 353    case GL_STENCIL_INDEX4_EXT:
 354    case GL_STENCIL_INDEX8_EXT:
 355    case GL_STENCIL_INDEX16_EXT:
 356       if (allow[PIPE_FORMAT_U_S8])
 357          return PIPE_FORMAT_U_S8;
 358       if (allow[PIPE_FORMAT_S8_Z24])
 359          return PIPE_FORMAT_S8_Z24;
 360       return PIPE_FORMAT_NONE;
 361
 362    case GL_DEPTH_STENCIL_EXT:
 363    case GL_DEPTH24_STENCIL8_EXT:
 364       if (allow[PIPE_FORMAT_S8_Z24])
 365          return PIPE_FORMAT_S8_Z24;
 366       return PIPE_FORMAT_NONE;
 367
 368    default:
 369       return PIPE_FORMAT_NONE;
 370    }
 371 }
 372
 373
 374
 375 /* It works out that this function is fine for all the supported
 376  * hardware.  However, there is still a need to map the formats onto
 377  * hardware descriptors.
 378  */
 379 /* Note that the i915 can actually support many more formats than
 380  * these if we take the step of simply swizzling the colors
 381  * immediately after sampling...
 382  */
 383 const struct gl_texture_format *
 384 st_ChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
 385                          GLenum format, GLenum type)
 386 {
 387 #if 0
 388    struct intel_context *intel = intel_context(ctx);
 389    const GLboolean do32bpt = (intel->intelScreen->front.cpp == 4);
 390 #else
 391    const GLboolean do32bpt = 1;
 392 #endif
 393
 394    switch (internalFormat) {
 395    case 4:
 396    case GL_RGBA:
 397    case GL_COMPRESSED_RGBA:
 398       if (format == GL_BGRA) {
 399          if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {
 400             return &_mesa_texformat_argb8888;
 401          }
 402          else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
 403             return &_mesa_texformat_argb4444;
 404          }
 405          else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
 406             return &_mesa_texformat_argb1555;
 407          }
 408       }
 409       return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 410
 411    case 3:
 412    case GL_RGB:
 413    case GL_COMPRESSED_RGB:
 414       if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
 415          return &_mesa_texformat_rgb565;
 416       }
 417       return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;
 418
 419    case GL_RGBA8:
 420    case GL_RGB10_A2:
 421    case GL_RGBA12:
 422    case GL_RGBA16:
 423       return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 424
 425    case GL_RGBA4:
 426    case GL_RGBA2:
 427       return &_mesa_texformat_argb4444;
 428
 429    case GL_RGB5_A1:
 430       return &_mesa_texformat_argb1555;
 431
 432    case GL_RGB8:
 433    case GL_RGB10:
 434    case GL_RGB12:
 435    case GL_RGB16:
 436       return &_mesa_texformat_argb8888;
 437
 438    case GL_RGB5:
 439    case GL_RGB4:
 440    case GL_R3_G3_B2:
 441       return &_mesa_texformat_rgb565;
 442
 443    case GL_ALPHA:
 444    case GL_ALPHA4:
 445    case GL_ALPHA8:
 446    case GL_ALPHA12:
 447    case GL_ALPHA16:
 448    case GL_COMPRESSED_ALPHA:
 449       return &_mesa_texformat_a8;
 450
 451    case 1:
 452    case GL_LUMINANCE:
 453    case GL_LUMINANCE4:
 454    case GL_LUMINANCE8:
 455    case GL_LUMINANCE12:
 456    case GL_LUMINANCE16:
 457    case GL_COMPRESSED_LUMINANCE:
 458       return &_mesa_texformat_l8;
 459
 460    case 2:
 461    case GL_LUMINANCE_ALPHA:
 462    case GL_LUMINANCE4_ALPHA4:
 463    case GL_LUMINANCE6_ALPHA2:
 464    case GL_LUMINANCE8_ALPHA8:
 465    case GL_LUMINANCE12_ALPHA4:
 466    case GL_LUMINANCE12_ALPHA12:
 467    case GL_LUMINANCE16_ALPHA16:
 468    case GL_COMPRESSED_LUMINANCE_ALPHA:
 469       return &_mesa_texformat_al88;
 470
 471    case GL_INTENSITY:
 472    case GL_INTENSITY4:
 473    case GL_INTENSITY8:
 474    case GL_INTENSITY12:
 475    case GL_INTENSITY16:
 476    case GL_COMPRESSED_INTENSITY:
 477       return &_mesa_texformat_i8;
 478
 479    case GL_YCBCR_MESA:
 480       if (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE)
 481          return &_mesa_texformat_ycbcr;
 482       else
 483          return &_mesa_texformat_ycbcr_rev;
 484
 485    case GL_COMPRESSED_RGB_FXT1_3DFX:
 486       return &_mesa_texformat_rgb_fxt1;
 487    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 488       return &_mesa_texformat_rgba_fxt1;
 489
 490    case GL_RGB_S3TC:
 491    case GL_RGB4_S3TC:
 492    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 493       return &_mesa_texformat_rgb_dxt1;
 494
 495    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 496       return &_mesa_texformat_rgba_dxt1;
 497
 498    case GL_RGBA_S3TC:
 499    case GL_RGBA4_S3TC:
 500    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 501       return &_mesa_texformat_rgba_dxt3;
 502
 503    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 504       return &_mesa_texformat_rgba_dxt5;
 505
 506    case GL_DEPTH_COMPONENT:
 507    case GL_DEPTH_COMPONENT16:
 508    case GL_DEPTH_COMPONENT24:
 509    case GL_DEPTH_COMPONENT32:
 510       return &_mesa_texformat_z16;
 511
 512    case GL_DEPTH_STENCIL_EXT:
 513    case GL_DEPTH24_STENCIL8_EXT:
 514       return &_mesa_texformat_z24_s8;
 515
 516    default:
 517       fprintf(stderr, "unexpected texture format %s in %s\n",
 518               _mesa_lookup_enum_by_nr(internalFormat), __FUNCTION__);
 519       return NULL;
 520    }
 521
 522    return NULL;                 /* never get here */
 523 }