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       {
  83          PIPE_FORMAT_U_Z16,
  84          GL_DEPTH_COMPONENT,         /* base_format */
  85          0, 0, 0, 0, 0, 0,           /* color bits */
  86          16, 0,                      /* depth, stencil */
  87          2                           /* size in bytes */
  88       },
  89       {
  90          PIPE_FORMAT_U_Z32,
  91          GL_DEPTH_COMPONENT,         /* base_format */
  92          0, 0, 0, 0, 0, 0,           /* color bits */
  93          32, 0,                      /* depth, stencil */
  94          4                           /* size in bytes */
  95       },
  96       {
  97          PIPE_FORMAT_S8_Z24,
  98          GL_DEPTH_STENCIL_EXT,       /* base_format */
  99          0, 0, 0, 0, 0, 0,           /* color bits */
 100          24, 8,                      /* depth, stencil */
 101          4                           /* size in bytes */
 102       }
 103       /* XXX lots more cases to add */
 104    };
 105    GLuint i;
 106
 107    for (i = 0; i < sizeof(info) / sizeof(info[0]); i++) {
 108       if (info[i].format == format)
 109          return info + i;
 110    }
 111    return NULL;
 112 }
 113
 114
 115 GLuint
 116 st_sizeof_format(GLuint pipeFormat)
 117 {
 118    const struct pipe_format_info *info = st_get_format_info(pipeFormat);
 119    assert(info);
 120    return info->size;
 121 }
 122
 123
 124 GLuint
 125 st_mesa_format_to_pipe_format(GLuint mesaFormat)
 126 {
 127    switch (mesaFormat) {
 128       /* fix this */
 129    case MESA_FORMAT_ARGB8888_REV:
 130    case MESA_FORMAT_ARGB8888:
 131       return PIPE_FORMAT_U_A8_R8_G8_B8;
 132    case MESA_FORMAT_AL88:
 133       return PIPE_FORMAT_U_A8_L8;
 134    case MESA_FORMAT_A8:
 135       return PIPE_FORMAT_U_A8;
 136    case MESA_FORMAT_L8:
 137       return PIPE_FORMAT_U_L8;
 138    case MESA_FORMAT_I8:
 139       return PIPE_FORMAT_U_I8;
 140    case MESA_FORMAT_Z16:
 141       return PIPE_FORMAT_U_Z16;
 142    default:
 143       assert(0);
 144       return 0;
 145    }
 146 }
 147
 148
 149 /**
 150  * Search list of formats for first RGBA format.
 151  */
 152 static GLuint
 153 default_rgba_format(const GLuint formats[], GLuint num)
 154 {
 155    GLuint i;
 156    for (i = 0; i < num; i++) {
 157       if (formats[i] == PIPE_FORMAT_U_R8_G8_B8_A8 ||
 158           formats[i] == PIPE_FORMAT_U_A8_R8_G8_B8 ||
 159           formats[i] == PIPE_FORMAT_U_R5_G6_B5) {
 160          return formats[i];
 161       }
 162    }
 163    return PIPE_FORMAT_NONE;
 164 }
 165
 166
 167 /**
 168  * Search list of formats for first depth/Z format.
 169  */
 170 static GLuint
 171 default_depth_format(const GLuint formats[], GLuint num)
 172 {
 173    GLuint i;
 174    for (i = 0; i < num; i++) {
 175       if (formats[i] == PIPE_FORMAT_U_Z16 ||
 176           formats[i] == PIPE_FORMAT_U_Z32 ||
 177           formats[i] == PIPE_FORMAT_S8_Z24) {
 178          return formats[i];
 179       }
 180    }
 181    return PIPE_FORMAT_NONE;
 182 }
 183
 184
 185 /**
 186  * Choose the PIPE_FORMAT_ to use for storing a texture image based
 187  * on the user's internalFormat, format and type parameters.
 188  * We query the pipe device for a list of formats which it supports
 189  * and choose from them.
 190  * If we find a device that needs a more intricate selection mechanism,
 191  * this function _could_ get pushed down into the pipe device.
 192  *
 193  * Note: also used for glRenderbufferStorageEXT()
 194  *
 195  * Note: format and type may be GL_NONE (see renderbuffers)
 196  *
 197  * \return PIPE_FORMAT_NONE if error/problem.
 198  */
 199 GLuint
 200 st_choose_pipe_format(struct pipe_context *pipe, GLint internalFormat,
 201                       GLenum format, GLenum type)
 202 {
 203    const GLuint *supported;
 204    GLboolean allow[PIPE_FORMAT_COUNT];
 205    GLuint i, n;
 206
 207    /* query supported formats and fill in bool allow[] table */
 208    supported = pipe->supported_formats(pipe, &n);
 209    assert(n < PIPE_FORMAT_COUNT); /* sanity check */
 210    memset(allow, 0, sizeof(allow));
 211    for (i = 0; i < n; i++) {
 212       allow[supported[i]] = 1;
 213    }
 214
 215    switch (internalFormat) {
 216    case 4:
 217    case GL_RGBA:
 218    case GL_COMPRESSED_RGBA:
 219       if (format == GL_BGRA) {
 220          if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {
 221             if (allow[PIPE_FORMAT_U_A8_R8_G8_B8])
 222                return PIPE_FORMAT_U_A8_R8_G8_B8;
 223          }
 224          else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
 225             if (allow[PIPE_FORMAT_U_A4_R4_G4_B4])
 226                return PIPE_FORMAT_U_A4_R4_G4_B4;
 227          }
 228          else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
 229             if (allow[PIPE_FORMAT_U_A1_R5_G5_B5])
 230                return PIPE_FORMAT_U_A1_R5_G5_B5;
 231          }
 232       }
 233       return default_rgba_format(supported, n);
 234
 235    case 3:
 236    case GL_RGB:
 237    case GL_COMPRESSED_RGB:
 238       if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
 239          if (allow[PIPE_FORMAT_U_R5_G6_B5])
 240             return PIPE_FORMAT_U_R5_G6_B5;
 241       }
 242       return default_rgba_format(supported, n);
 243
 244    case GL_RGBA8:
 245    case GL_RGB10_A2:
 246    case GL_RGBA12:
 247    case GL_RGBA16:
 248       return default_rgba_format(supported, n);
 249
 250    case GL_RGBA4:
 251    case GL_RGBA2:
 252       if (allow[PIPE_FORMAT_U_A4_R4_G4_B4])
 253          return PIPE_FORMAT_U_A4_R4_G4_B4;
 254       return default_rgba_format(supported, n);
 255
 256    case GL_RGB5_A1:
 257       if (allow[PIPE_FORMAT_U_A1_R5_G5_B5])
 258          return PIPE_FORMAT_U_A1_R5_G5_B5;
 259       return default_rgba_format(supported, n);
 260
 261    case GL_RGB8:
 262    case GL_RGB10:
 263    case GL_RGB12:
 264    case GL_RGB16:
 265       return default_rgba_format(supported, n);
 266
 267    case GL_RGB5:
 268    case GL_RGB4:
 269    case GL_R3_G3_B2:
 270       if (allow[PIPE_FORMAT_U_A1_R5_G5_B5])
 271          return PIPE_FORMAT_U_A1_R5_G5_B5;
 272       return default_rgba_format(supported, n);
 273
 274    case GL_ALPHA:
 275    case GL_ALPHA4:
 276    case GL_ALPHA8:
 277    case GL_ALPHA12:
 278    case GL_ALPHA16:
 279    case GL_COMPRESSED_ALPHA:
 280       if (allow[PIPE_FORMAT_U_A8])
 281          return PIPE_FORMAT_U_A8;
 282       return default_rgba_format(supported, n);
 283
 284    case 1:
 285    case GL_LUMINANCE:
 286    case GL_LUMINANCE4:
 287    case GL_LUMINANCE8:
 288    case GL_LUMINANCE12:
 289    case GL_LUMINANCE16:
 290    case GL_COMPRESSED_LUMINANCE:
 291       if (allow[PIPE_FORMAT_U_A8])
 292          return PIPE_FORMAT_U_A8;
 293       return default_rgba_format(supported, n);
 294
 295    case 2:
 296    case GL_LUMINANCE_ALPHA:
 297    case GL_LUMINANCE4_ALPHA4:
 298    case GL_LUMINANCE6_ALPHA2:
 299    case GL_LUMINANCE8_ALPHA8:
 300    case GL_LUMINANCE12_ALPHA4:
 301    case GL_LUMINANCE12_ALPHA12:
 302    case GL_LUMINANCE16_ALPHA16:
 303    case GL_COMPRESSED_LUMINANCE_ALPHA:
 304       if (allow[PIPE_FORMAT_U_A8_L8])
 305          return PIPE_FORMAT_U_A8_L8;
 306       return default_rgba_format(supported, n);
 307
 308    case GL_INTENSITY:
 309    case GL_INTENSITY4:
 310    case GL_INTENSITY8:
 311    case GL_INTENSITY12:
 312    case GL_INTENSITY16:
 313    case GL_COMPRESSED_INTENSITY:
 314       if (allow[PIPE_FORMAT_U_I8])
 315          return PIPE_FORMAT_U_I8;
 316       return default_rgba_format(supported, n);
 317
 318    case GL_YCBCR_MESA:
 319       if (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE) {
 320          if (allow[PIPE_FORMAT_YCBCR])
 321             return PIPE_FORMAT_YCBCR;
 322       }
 323       else {
 324          if (allow[PIPE_FORMAT_YCBCR_REV])
 325             return PIPE_FORMAT_YCBCR_REV;
 326       }
 327       return PIPE_FORMAT_NONE;
 328
 329 #if 0
 330    case GL_COMPRESSED_RGB_FXT1_3DFX:
 331       return &_mesa_texformat_rgb_fxt1;
 332    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 333       return &_mesa_texformat_rgba_fxt1;
 334
 335    case GL_RGB_S3TC:
 336    case GL_RGB4_S3TC:
 337    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 338       return &_mesa_texformat_rgb_dxt1;
 339
 340    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 341       return &_mesa_texformat_rgba_dxt1;
 342
 343    case GL_RGBA_S3TC:
 344    case GL_RGBA4_S3TC:
 345    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 346       return &_mesa_texformat_rgba_dxt3;
 347
 348    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 349       return &_mesa_texformat_rgba_dxt5;
 350 #endif
 351
 352    case GL_DEPTH_COMPONENT16:
 353       if (allow[PIPE_FORMAT_U_Z16])
 354          return PIPE_FORMAT_U_Z16;
 355       /* fall-through */
 356    case GL_DEPTH_COMPONENT24:
 357       if (allow[PIPE_FORMAT_S8_Z24])
 358          return PIPE_FORMAT_S8_Z24;
 359       /* fall-through */
 360    case GL_DEPTH_COMPONENT32:
 361       if (allow[PIPE_FORMAT_U_Z32])
 362          return PIPE_FORMAT_U_Z32;
 363       /* fall-through */
 364    case GL_DEPTH_COMPONENT:
 365       return default_depth_format(supported, n);
 366
 367    case GL_STENCIL_INDEX:
 368    case GL_STENCIL_INDEX1_EXT:
 369    case GL_STENCIL_INDEX4_EXT:
 370    case GL_STENCIL_INDEX8_EXT:
 371    case GL_STENCIL_INDEX16_EXT:
 372       if (allow[PIPE_FORMAT_U_S8])
 373          return PIPE_FORMAT_U_S8;
 374       if (allow[PIPE_FORMAT_S8_Z24])
 375          return PIPE_FORMAT_S8_Z24;
 376       return PIPE_FORMAT_NONE;
 377
 378    case GL_DEPTH_STENCIL_EXT:
 379    case GL_DEPTH24_STENCIL8_EXT:
 380       if (allow[PIPE_FORMAT_S8_Z24])
 381          return PIPE_FORMAT_S8_Z24;
 382       return PIPE_FORMAT_NONE;
 383
 384    default:
 385       return PIPE_FORMAT_NONE;
 386    }
 387 }
 388
 389
 390
 391 /* It works out that this function is fine for all the supported
 392  * hardware.  However, there is still a need to map the formats onto
 393  * hardware descriptors.
 394  */
 395 /* Note that the i915 can actually support many more formats than
 396  * these if we take the step of simply swizzling the colors
 397  * immediately after sampling...
 398  */
 399 const struct gl_texture_format *
 400 st_ChooseTextureFormat(GLcontext * ctx, GLint internalFormat,
 401                          GLenum format, GLenum type)
 402 {
 403 #if 0
 404    struct intel_context *intel = intel_context(ctx);
 405    const GLboolean do32bpt = (intel->intelScreen->front.cpp == 4);
 406 #else
 407    const GLboolean do32bpt = 1;
 408 #endif
 409
 410    switch (internalFormat) {
 411    case 4:
 412    case GL_RGBA:
 413    case GL_COMPRESSED_RGBA:
 414       if (format == GL_BGRA) {
 415          if (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) {
 416             return &_mesa_texformat_argb8888;
 417          }
 418          else if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
 419             return &_mesa_texformat_argb4444;
 420          }
 421          else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
 422             return &_mesa_texformat_argb1555;
 423          }
 424       }
 425       return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 426
 427    case 3:
 428    case GL_RGB:
 429    case GL_COMPRESSED_RGB:
 430       if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) {
 431          return &_mesa_texformat_rgb565;
 432       }
 433       return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;
 434
 435    case GL_RGBA8:
 436    case GL_RGB10_A2:
 437    case GL_RGBA12:
 438    case GL_RGBA16:
 439       return do32bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_argb4444;
 440
 441    case GL_RGBA4:
 442    case GL_RGBA2:
 443       return &_mesa_texformat_argb4444;
 444
 445    case GL_RGB5_A1:
 446       return &_mesa_texformat_argb1555;
 447
 448    case GL_RGB8:
 449    case GL_RGB10:
 450    case GL_RGB12:
 451    case GL_RGB16:
 452       return &_mesa_texformat_argb8888;
 453
 454    case GL_RGB5:
 455    case GL_RGB4:
 456    case GL_R3_G3_B2:
 457       return &_mesa_texformat_rgb565;
 458
 459    case GL_ALPHA:
 460    case GL_ALPHA4:
 461    case GL_ALPHA8:
 462    case GL_ALPHA12:
 463    case GL_ALPHA16:
 464    case GL_COMPRESSED_ALPHA:
 465       return &_mesa_texformat_a8;
 466
 467    case 1:
 468    case GL_LUMINANCE:
 469    case GL_LUMINANCE4:
 470    case GL_LUMINANCE8:
 471    case GL_LUMINANCE12:
 472    case GL_LUMINANCE16:
 473    case GL_COMPRESSED_LUMINANCE:
 474       return &_mesa_texformat_l8;
 475
 476    case 2:
 477    case GL_LUMINANCE_ALPHA:
 478    case GL_LUMINANCE4_ALPHA4:
 479    case GL_LUMINANCE6_ALPHA2:
 480    case GL_LUMINANCE8_ALPHA8:
 481    case GL_LUMINANCE12_ALPHA4:
 482    case GL_LUMINANCE12_ALPHA12:
 483    case GL_LUMINANCE16_ALPHA16:
 484    case GL_COMPRESSED_LUMINANCE_ALPHA:
 485       return &_mesa_texformat_al88;
 486
 487    case GL_INTENSITY:
 488    case GL_INTENSITY4:
 489    case GL_INTENSITY8:
 490    case GL_INTENSITY12:
 491    case GL_INTENSITY16:
 492    case GL_COMPRESSED_INTENSITY:
 493       return &_mesa_texformat_i8;
 494
 495    case GL_YCBCR_MESA:
 496       if (type == GL_UNSIGNED_SHORT_8_8_MESA || type == GL_UNSIGNED_BYTE)
 497          return &_mesa_texformat_ycbcr;
 498       else
 499          return &_mesa_texformat_ycbcr_rev;
 500
 501    case GL_COMPRESSED_RGB_FXT1_3DFX:
 502       return &_mesa_texformat_rgb_fxt1;
 503    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 504       return &_mesa_texformat_rgba_fxt1;
 505
 506    case GL_RGB_S3TC:
 507    case GL_RGB4_S3TC:
 508    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 509       return &_mesa_texformat_rgb_dxt1;
 510
 511    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 512       return &_mesa_texformat_rgba_dxt1;
 513
 514    case GL_RGBA_S3TC:
 515    case GL_RGBA4_S3TC:
 516    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 517       return &_mesa_texformat_rgba_dxt3;
 518
 519    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 520       return &_mesa_texformat_rgba_dxt5;
 521
 522    case GL_DEPTH_COMPONENT:
 523    case GL_DEPTH_COMPONENT16:
 524    case GL_DEPTH_COMPONENT24:
 525    case GL_DEPTH_COMPONENT32:
 526       return &_mesa_texformat_z16;
 527
 528    case GL_DEPTH_STENCIL_EXT:
 529    case GL_DEPTH24_STENCIL8_EXT:
 530       return &_mesa_texformat_z24_s8;
 531
 532    default:
 533       fprintf(stderr, "unexpected texture format %s in %s\n",
 534               _mesa_lookup_enum_by_nr(internalFormat), __FUNCTION__);
 535       return NULL;
 536    }
 537
 538    return NULL;                 /* never get here */
 539 }