src/mesa/main/format_unpack.py

   1 #!/usr/bin/env python
   2
   3 from mako.template import Template
   4 from sys import argv
   5
   6 string = """/*
   7  * Mesa 3-D graphics library
   8  *
   9  * Copyright (c) 2011 VMware, Inc.
  10  * Copyright (c) 2014 Intel Corporation.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included
  20  * in all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  23  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  26  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  27  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  28  * OTHER DEALINGS IN THE SOFTWARE.
  29  */
  30
  31
  32 /**
  33  * Color, depth, stencil packing functions.
  34  * Used to pack basic color, depth and stencil formats to specific
  35  * hardware formats.
  36  *
  37  * There are both per-pixel and per-row packing functions:
  38  * - The former will be used by swrast to write values to the color, depth,
  39  *   stencil buffers when drawing points, lines and masked spans.
  40  * - The later will be used for image-oriented functions like glDrawPixels,
  41  *   glAccum, and glTexImage.
  42  */
  43
  44 #include <stdint.h>
  45
  46 #include "format_unpack.h"
  47 #include "format_utils.h"
  48 #include "macros.h"
  49 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
  50 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
  51 #include "util/format_srgb.h"
  52
  53 #define UNPACK(SRC, OFFSET, BITS) (((SRC) >> (OFFSET)) & MAX_UINT(BITS))
  54
  55 <%
  56 import format_parser as parser
  57
  58 formats = parser.parse(argv[1])
  59
  60 rgb_formats = []
  61 for f in formats:
  62    if f.name == 'MESA_FORMAT_NONE':
  63       continue
  64    if f.colorspace not in ('rgb', 'srgb'):
  65       continue
  66
  67    rgb_formats.append(f)
  68 %>
  69
  70 /* float unpacking functions */
  71
  72 %for f in rgb_formats:
  73    %if f.name in ('MESA_FORMAT_R9G9B9E5_FLOAT', 'MESA_FORMAT_R11G11B10_FLOAT'):
  74       <% continue %>
  75    %elif f.is_int() and not f.is_normalized():
  76       <% continue %>
  77    %elif f.is_compressed():
  78       <% continue %>
  79    %endif
  80
  81 static inline void
  82 unpack_float_${f.short_name()}(const void *void_src, GLfloat dst[4])
  83 {
  84    ${f.datatype()} *src = (${f.datatype()} *)void_src;
  85    %if f.layout == parser.PACKED:
  86       %for c in f.channels:
  87          %if c.type != 'x':
  88             ${c.datatype()} ${c.name} = UNPACK(*src, ${c.shift}, ${c.size});
  89          %endif
  90       %endfor
  91    %elif f.layout == parser.ARRAY:
  92       %for (i, c) in enumerate(f.channels):
  93          %if c.type != 'x':
  94             ${c.datatype()} ${c.name} = src[${i}];
  95          %endif
  96       %endfor
  97    %else:
  98       <% assert False %>
  99    %endif
 100
 101    %for i in range(4):
 102       <% s = f.swizzle[i] %>
 103       %if 0 <= s and s <= parser.Swizzle.SWIZZLE_W:
 104          <% c = f.channels[s] %>
 105          %if c.type == parser.UNSIGNED:
 106             %if f.colorspace == 'srgb' and c.name in 'rgb':
 107                <% assert c.size == 8 %>
 108                dst[${i}] = util_format_srgb_8unorm_to_linear_float(${c.name});
 109             %else:
 110                dst[${i}] = _mesa_unorm_to_float(${c.name}, ${c.size});
 111             %endif
 112          %elif c.type == parser.SIGNED:
 113             dst[${i}] = _mesa_snorm_to_float(${c.name}, ${c.size});
 114          %elif c.type == parser.FLOAT:
 115             %if c.size == 32:
 116                dst[${i}] = ${c.name};
 117             %elif c.size == 16:
 118                dst[${i}] = _mesa_half_to_float(${c.name});
 119             %else:
 120                <% assert False %>
 121             %endif
 122          %else:
 123             <% assert False %>
 124          %endif
 125       %elif s == parser.Swizzle.SWIZZLE_ZERO:
 126          dst[${i}] = 0.0f;
 127       %elif s == parser.Swizzle.SWIZZLE_ONE:
 128          dst[${i}] = 1.0f;
 129       %else:
 130          <% assert False %>
 131       %endif
 132    %endfor
 133 }
 134 %endfor
 135
 136 static void
 137 unpack_float_r9g9b9e5_float(const void *src, GLfloat dst[4])
 138 {
 139    rgb9e5_to_float3(*(const GLuint *)src, dst);
 140    dst[3] = 1.0f;
 141 }
 142
 143 static void
 144 unpack_float_r11g11b10_float(const void *src, GLfloat dst[4])
 145 {
 146    r11g11b10f_to_float3(*(const GLuint *)src, dst);
 147    dst[3] = 1.0f;
 148 }
 149
 150 static void
 151 unpack_float_ycbcr(const void *src, GLfloat dst[][4], GLuint n)
 152 {
 153    GLuint i;
 154    for (i = 0; i < n; i++) {
 155       const GLushort *src0 = ((const GLushort *) src) + i * 2; /* even */
 156       const GLushort *src1 = src0 + 1;         /* odd */
 157       const GLubyte y0 = (*src0 >> 8) & 0xff;  /* luminance */
 158       const GLubyte cb = *src0 & 0xff;         /* chroma U */
 159       const GLubyte y1 = (*src1 >> 8) & 0xff;  /* luminance */
 160       const GLubyte cr = *src1 & 0xff;         /* chroma V */
 161       const GLubyte y = (i & 1) ? y1 : y0;     /* choose even/odd luminance */
 162       GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128);
 163       GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128);
 164       GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128);
 165       r *= (1.0F / 255.0F);
 166       g *= (1.0F / 255.0F);
 167       b *= (1.0F / 255.0F);
 168       dst[i][0] = CLAMP(r, 0.0F, 1.0F);
 169       dst[i][1] = CLAMP(g, 0.0F, 1.0F);
 170       dst[i][2] = CLAMP(b, 0.0F, 1.0F);
 171       dst[i][3] = 1.0F;
 172    }
 173 }
 174
 175 static void
 176 unpack_float_ycbcr_rev(const void *src, GLfloat dst[][4], GLuint n)
 177 {
 178    GLuint i;
 179    for (i = 0; i < n; i++) {
 180       const GLushort *src0 = ((const GLushort *) src) + i * 2; /* even */
 181       const GLushort *src1 = src0 + 1;         /* odd */
 182       const GLubyte y0 = *src0 & 0xff;         /* luminance */
 183       const GLubyte cr = (*src0 >> 8) & 0xff;  /* chroma V */
 184       const GLubyte y1 = *src1 & 0xff;         /* luminance */
 185       const GLubyte cb = (*src1 >> 8) & 0xff;  /* chroma U */
 186       const GLubyte y = (i & 1) ? y1 : y0;     /* choose even/odd luminance */
 187       GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128);
 188       GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128);
 189       GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128);
 190       r *= (1.0F / 255.0F);
 191       g *= (1.0F / 255.0F);
 192       b *= (1.0F / 255.0F);
 193       dst[i][0] = CLAMP(r, 0.0F, 1.0F);
 194       dst[i][1] = CLAMP(g, 0.0F, 1.0F);
 195       dst[i][2] = CLAMP(b, 0.0F, 1.0F);
 196       dst[i][3] = 1.0F;
 197    }
 198 }
 199
 200 /* ubyte packing functions */
 201
 202 %for f in rgb_formats:
 203    %if not f.is_normalized():
 204       <% continue %>
 205    %endif
 206
 207 static inline void
 208 unpack_ubyte_${f.short_name()}(const void *void_src, GLubyte dst[4])
 209 {
 210    ${f.datatype()} *src = (${f.datatype()} *)void_src;
 211    %if f.layout == parser.PACKED:
 212       %for c in f.channels:
 213          %if c.type != 'x':
 214             ${c.datatype()} ${c.name} = UNPACK(*src, ${c.shift}, ${c.size});
 215          %endif
 216       %endfor
 217    %elif f.layout == parser.ARRAY:
 218       %for (i, c) in enumerate(f.channels):
 219          %if c.type != 'x':
 220             ${c.datatype()} ${c.name} = src[${i}];
 221          %endif
 222       %endfor
 223    %else:
 224       <% assert False %>
 225    %endif
 226
 227    %for i in range(4):
 228       <% s = f.swizzle[i] %>
 229       %if 0 <= s and s <= parser.Swizzle.SWIZZLE_W:
 230          <% c = f.channels[s] %>
 231          %if c.type == parser.UNSIGNED:
 232             %if f.colorspace == 'srgb' and c.name in 'rgb':
 233                <% assert c.size == 8 %>
 234                dst[${i}] = util_format_srgb_to_linear_8unorm(${c.name});
 235             %else:
 236                dst[${i}] = _mesa_unorm_to_unorm(${c.name}, ${c.size}, 8);
 237             %endif
 238          %elif c.type == parser.SIGNED:
 239             dst[${i}] = _mesa_snorm_to_unorm(${c.name}, ${c.size}, 8);
 240          %elif c.type == parser.FLOAT:
 241             %if c.size == 32:
 242                dst[${i}] = _mesa_float_to_unorm(${c.name}, 8);
 243             %elif c.size == 16:
 244                dst[${i}] = _mesa_half_to_unorm(${c.name}, 8);
 245             %else:
 246                <% assert False %>
 247             %endif
 248          %else:
 249             <% assert False %>
 250          %endif
 251       %elif s == parser.Swizzle.SWIZZLE_ZERO:
 252          dst[${i}] = 0;
 253       %elif s == parser.Swizzle.SWIZZLE_ONE:
 254          dst[${i}] = 255;
 255       %else:
 256          <% assert False %>
 257       %endif
 258    %endfor
 259 }
 260 %endfor
 261
 262 /* integer packing functions */
 263
 264 %for f in rgb_formats:
 265    %if not f.is_int():
 266       <% continue %>
 267    %elif f.is_normalized():
 268       <% continue %>
 269    %endif
 270
 271 static inline void
 272 unpack_int_${f.short_name()}(const void *void_src, GLuint dst[4])
 273 {
 274    ${f.datatype()} *src = (${f.datatype()} *)void_src;
 275    %if f.layout == parser.PACKED:
 276       %for c in f.channels:
 277          %if c.type != 'x':
 278             ${c.datatype()} ${c.name} = UNPACK(*src, ${c.shift}, ${c.size});
 279          %endif
 280       %endfor
 281    %elif f.layout == parser.ARRAY:
 282       %for (i, c) in enumerate(f.channels):
 283          %if c.type != 'x':
 284             ${c.datatype()} ${c.name} = src[${i}];
 285          %endif
 286       %endfor
 287    %else:
 288       <% assert False %>
 289    %endif
 290
 291    %for i in range(4):
 292       <% s = f.swizzle[i] %>
 293       %if 0 <= s and s <= parser.Swizzle.SWIZZLE_W:
 294          dst[${i}] = ${f.channels[s].name};
 295       %elif s == parser.Swizzle.SWIZZLE_ZERO:
 296          dst[${i}] = 0;
 297       %elif s == parser.Swizzle.SWIZZLE_ONE:
 298          dst[${i}] = 1;
 299       %else:
 300          <% assert False %>
 301       %endif
 302    %endfor
 303 }
 304 %endfor
 305
 306
 307 void
 308 _mesa_unpack_rgba_row(mesa_format format, GLuint n,
 309                       const void *src, GLfloat dst[][4])
 310 {
 311    GLubyte *s = (GLubyte *)src;
 312    GLuint i;
 313
 314    switch (format) {
 315 %for f in rgb_formats:
 316    %if f.is_compressed():
 317       <% continue %>
 318    %elif f.is_int() and not f.is_normalized():
 319       <% continue %>
 320    %endif
 321    case ${f.name}:
 322       for (i = 0; i < n; ++i) {
 323          unpack_float_${f.short_name()}(s, dst[i]);
 324          s += ${f.block_size() / 8};
 325       }
 326       break;
 327 %endfor
 328    case MESA_FORMAT_YCBCR:
 329       unpack_float_ycbcr(src, dst, n);
 330       break;
 331    case MESA_FORMAT_YCBCR_REV:
 332       unpack_float_ycbcr_rev(src, dst, n);
 333       break;
 334    default:
 335       _mesa_problem(NULL, "%s: bad format %s", __func__,
 336                     _mesa_get_format_name(format));
 337       return;
 338    }
 339 }
 340
 341 void
 342 _mesa_unpack_ubyte_rgba_row(mesa_format format, GLuint n,
 343                             const void *src, GLubyte dst[][4])
 344 {
 345    GLubyte *s = (GLubyte *)src;
 346    GLuint i;
 347
 348    switch (format) {
 349 %for f in rgb_formats:
 350    %if not f.is_normalized():
 351       <% continue %>
 352    %endif
 353
 354    case ${f.name}:
 355       for (i = 0; i < n; ++i) {
 356          unpack_ubyte_${f.short_name()}(s, dst[i]);
 357          s += ${f.block_size() / 8};
 358       }
 359       break;
 360 %endfor
 361    default:
 362       /* get float values, convert to ubyte */
 363       {
 364          GLfloat *tmp = malloc(n * 4 * sizeof(GLfloat));
 365          if (tmp) {
 366             GLuint i;
 367             _mesa_unpack_rgba_row(format, n, src, (GLfloat (*)[4]) tmp);
 368             for (i = 0; i < n; i++) {
 369                dst[i][0] = _mesa_float_to_unorm(tmp[i*4+0], 8);
 370                dst[i][1] = _mesa_float_to_unorm(tmp[i*4+1], 8);
 371                dst[i][2] = _mesa_float_to_unorm(tmp[i*4+2], 8);
 372                dst[i][3] = _mesa_float_to_unorm(tmp[i*4+3], 8);
 373             }
 374             free(tmp);
 375          }
 376       }
 377       break;
 378    }
 379 }
 380
 381 void
 382 _mesa_unpack_uint_rgba_row(mesa_format format, GLuint n,
 383                            const void *src, GLuint dst[][4])
 384 {
 385    GLubyte *s = (GLubyte *)src;
 386    GLuint i;
 387
 388    switch (format) {
 389 %for f in rgb_formats:
 390    %if not f.is_int():
 391       <% continue %>
 392    %elif f.is_normalized():
 393       <% continue %>
 394    %endif
 395
 396    case ${f.name}:
 397       for (i = 0; i < n; ++i) {
 398          unpack_int_${f.short_name()}(s, dst[i]);
 399          s += ${f.block_size() / 8};
 400       }
 401       break;
 402 %endfor
 403    default:
 404       _mesa_problem(NULL, "%s: bad format %s", __func__,
 405                     _mesa_get_format_name(format));
 406       return;
 407    }
 408 }
 409
 410 /**
 411  * Unpack a 2D rect of pixels returning float RGBA colors.
 412  * \param format  the source image format
 413  * \param src  start address of the source image
 414  * \param srcRowStride  source image row stride in bytes
 415  * \param dst  start address of the dest image
 416  * \param dstRowStride  dest image row stride in bytes
 417  * \param x  source image start X pos
 418  * \param y  source image start Y pos
 419  * \param width  width of rect region to convert
 420  * \param height  height of rect region to convert
 421  */
 422 void
 423 _mesa_unpack_rgba_block(mesa_format format,
 424                         const void *src, GLint srcRowStride,
 425                         GLfloat dst[][4], GLint dstRowStride,
 426                         GLuint x, GLuint y, GLuint width, GLuint height)
 427 {
 428    const GLuint srcPixStride = _mesa_get_format_bytes(format);
 429    const GLuint dstPixStride = 4 * sizeof(GLfloat);
 430    const GLubyte *srcRow;
 431    GLubyte *dstRow;
 432    GLuint i;
 433
 434    /* XXX needs to be fixed for compressed formats */
 435
 436    srcRow = ((const GLubyte *) src) + srcRowStride * y + srcPixStride * x;
 437    dstRow = ((GLubyte *) dst) + dstRowStride * y + dstPixStride * x;
 438
 439    for (i = 0; i < height; i++) {
 440       _mesa_unpack_rgba_row(format, width, srcRow, (GLfloat (*)[4]) dstRow);
 441
 442       dstRow += dstRowStride;
 443       srcRow += srcRowStride;
 444    }
 445 }
 446
 447 /** Helper struct for MESA_FORMAT_Z32_FLOAT_S8X24_UINT */
 448 struct z32f_x24s8
 449 {
 450    float z;
 451    uint32_t x24s8;
 452 };
 453
 454 typedef void (*unpack_float_z_func)(GLuint n, const void *src, GLfloat *dst);
 455
 456 static void
 457 unpack_float_z_X8_UINT_Z24_UNORM(GLuint n, const void *src, GLfloat *dst)
 458 {
 459    /* only return Z, not stencil data */
 460    const GLuint *s = ((const GLuint *) src);
 461    const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
 462    GLuint i;
 463    for (i = 0; i < n; i++) {
 464       dst[i] = (GLfloat) ((s[i] >> 8) * scale);
 465       assert(dst[i] >= 0.0F);
 466       assert(dst[i] <= 1.0F);
 467    }
 468 }
 469
 470 static void
 471 unpack_float_z_Z24_UNORM_X8_UINT(GLuint n, const void *src, GLfloat *dst)
 472 {
 473    /* only return Z, not stencil data */
 474    const GLuint *s = ((const GLuint *) src);
 475    const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
 476    GLuint i;
 477    for (i = 0; i < n; i++) {
 478       dst[i] = (GLfloat) ((s[i] & 0x00ffffff) * scale);
 479       assert(dst[i] >= 0.0F);
 480       assert(dst[i] <= 1.0F);
 481    }
 482 }
 483
 484 static void
 485 unpack_float_Z_UNORM16(GLuint n, const void *src, GLfloat *dst)
 486 {
 487    const GLushort *s = ((const GLushort *) src);
 488    GLuint i;
 489    for (i = 0; i < n; i++) {
 490       dst[i] = s[i] * (1.0F / 65535.0F);
 491    }
 492 }
 493
 494 static void
 495 unpack_float_Z_UNORM32(GLuint n, const void *src, GLfloat *dst)
 496 {
 497    const GLuint *s = ((const GLuint *) src);
 498    GLuint i;
 499    for (i = 0; i < n; i++) {
 500       dst[i] = s[i] * (1.0F / 0xffffffff);
 501    }
 502 }
 503
 504 static void
 505 unpack_float_Z_FLOAT32(GLuint n, const void *src, GLfloat *dst)
 506 {
 507    memcpy(dst, src, n * sizeof(float));
 508 }
 509
 510 static void
 511 unpack_float_z_Z32X24S8(GLuint n, const void *src, GLfloat *dst)
 512 {
 513    const struct z32f_x24s8 *s = (const struct z32f_x24s8 *) src;
 514    GLuint i;
 515    for (i = 0; i < n; i++) {
 516       dst[i] = s[i].z;
 517    }
 518 }
 519
 520
 521
 522 /**
 523  * Unpack Z values.
 524  * The returned values will always be in the range [0.0, 1.0].
 525  */
 526 void
 527 _mesa_unpack_float_z_row(mesa_format format, GLuint n,
 528                          const void *src, GLfloat *dst)
 529 {
 530    unpack_float_z_func unpack;
 531
 532    switch (format) {
 533    case MESA_FORMAT_S8_UINT_Z24_UNORM:
 534    case MESA_FORMAT_X8_UINT_Z24_UNORM:
 535       unpack = unpack_float_z_X8_UINT_Z24_UNORM;
 536       break;
 537    case MESA_FORMAT_Z24_UNORM_S8_UINT:
 538    case MESA_FORMAT_Z24_UNORM_X8_UINT:
 539       unpack = unpack_float_z_Z24_UNORM_X8_UINT;
 540       break;
 541    case MESA_FORMAT_Z_UNORM16:
 542       unpack = unpack_float_Z_UNORM16;
 543       break;
 544    case MESA_FORMAT_Z_UNORM32:
 545       unpack = unpack_float_Z_UNORM32;
 546       break;
 547    case MESA_FORMAT_Z_FLOAT32:
 548       unpack = unpack_float_Z_FLOAT32;
 549       break;
 550    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
 551       unpack = unpack_float_z_Z32X24S8;
 552       break;
 553    default:
 554       _mesa_problem(NULL, "bad format %s in _mesa_unpack_float_z_row",
 555                     _mesa_get_format_name(format));
 556       return;
 557    }
 558
 559    unpack(n, src, dst);
 560 }
 561
 562
 563
 564 typedef void (*unpack_uint_z_func)(const void *src, GLuint *dst, GLuint n);
 565
 566 static void
 567 unpack_uint_z_X8_UINT_Z24_UNORM(const void *src, GLuint *dst, GLuint n)
 568 {
 569    /* only return Z, not stencil data */
 570    const GLuint *s = ((const GLuint *) src);
 571    GLuint i;
 572    for (i = 0; i < n; i++) {
 573       dst[i] = (s[i] & 0xffffff00) | (s[i] >> 24);
 574    }
 575 }
 576
 577 static void
 578 unpack_uint_z_Z24_UNORM_X8_UINT(const void *src, GLuint *dst, GLuint n)
 579 {
 580    /* only return Z, not stencil data */
 581    const GLuint *s = ((const GLuint *) src);
 582    GLuint i;
 583    for (i = 0; i < n; i++) {
 584       dst[i] = (s[i] << 8) | ((s[i] >> 16) & 0xff);
 585    }
 586 }
 587
 588 static void
 589 unpack_uint_Z_UNORM16(const void *src, GLuint *dst, GLuint n)
 590 {
 591    const GLushort *s = ((const GLushort *)src);
 592    GLuint i;
 593    for (i = 0; i < n; i++) {
 594       dst[i] = (s[i] << 16) | s[i];
 595    }
 596 }
 597
 598 static void
 599 unpack_uint_Z_UNORM32(const void *src, GLuint *dst, GLuint n)
 600 {
 601    memcpy(dst, src, n * sizeof(GLuint));
 602 }
 603
 604 static void
 605 unpack_uint_Z_FLOAT32(const void *src, GLuint *dst, GLuint n)
 606 {
 607    const float *s = (const float *)src;
 608    GLuint i;
 609    for (i = 0; i < n; i++) {
 610       dst[i] = FLOAT_TO_UINT(CLAMP(s[i], 0.0F, 1.0F));
 611    }
 612 }
 613
 614 static void
 615 unpack_uint_Z_FLOAT32_X24S8(const void *src, GLuint *dst, GLuint n)
 616 {
 617    const struct z32f_x24s8 *s = (const struct z32f_x24s8 *) src;
 618    GLuint i;
 619
 620    for (i = 0; i < n; i++) {
 621       dst[i] = FLOAT_TO_UINT(CLAMP(s[i].z, 0.0F, 1.0F));
 622    }
 623 }
 624
 625
 626 /**
 627  * Unpack Z values.
 628  * The returned values will always be in the range [0, 0xffffffff].
 629  */
 630 void
 631 _mesa_unpack_uint_z_row(mesa_format format, GLuint n,
 632                         const void *src, GLuint *dst)
 633 {
 634    unpack_uint_z_func unpack;
 635    const GLubyte *srcPtr = (GLubyte *) src;
 636
 637    switch (format) {
 638    case MESA_FORMAT_S8_UINT_Z24_UNORM:
 639    case MESA_FORMAT_X8_UINT_Z24_UNORM:
 640       unpack = unpack_uint_z_X8_UINT_Z24_UNORM;
 641       break;
 642    case MESA_FORMAT_Z24_UNORM_S8_UINT:
 643    case MESA_FORMAT_Z24_UNORM_X8_UINT:
 644       unpack = unpack_uint_z_Z24_UNORM_X8_UINT;
 645       break;
 646    case MESA_FORMAT_Z_UNORM16:
 647       unpack = unpack_uint_Z_UNORM16;
 648       break;
 649    case MESA_FORMAT_Z_UNORM32:
 650       unpack = unpack_uint_Z_UNORM32;
 651       break;
 652    case MESA_FORMAT_Z_FLOAT32:
 653       unpack = unpack_uint_Z_FLOAT32;
 654       break;
 655    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
 656       unpack = unpack_uint_Z_FLOAT32_X24S8;
 657       break;
 658    default:
 659       _mesa_problem(NULL, "bad format %s in _mesa_unpack_uint_z_row",
 660                     _mesa_get_format_name(format));
 661       return;
 662    }
 663
 664    unpack(srcPtr, dst, n);
 665 }
 666
 667
 668 static void
 669 unpack_ubyte_s_S_UINT8(const void *src, GLubyte *dst, GLuint n)
 670 {
 671    memcpy(dst, src, n);
 672 }
 673
 674 static void
 675 unpack_ubyte_s_S8_UINT_Z24_UNORM(const void *src, GLubyte *dst, GLuint n)
 676 {
 677    GLuint i;
 678    const GLuint *src32 = src;
 679
 680    for (i = 0; i < n; i++)
 681       dst[i] = src32[i] & 0xff;
 682 }
 683
 684 static void
 685 unpack_ubyte_s_Z24_UNORM_S8_UINT(const void *src, GLubyte *dst, GLuint n)
 686 {
 687    GLuint i;
 688    const GLuint *src32 = src;
 689
 690    for (i = 0; i < n; i++)
 691       dst[i] = src32[i] >> 24;
 692 }
 693
 694 static void
 695 unpack_ubyte_s_Z32_FLOAT_S8X24_UINT(const void *src, GLubyte *dst, GLuint n)
 696 {
 697    GLuint i;
 698    const struct z32f_x24s8 *s = (const struct z32f_x24s8 *) src;
 699
 700    for (i = 0; i < n; i++)
 701       dst[i] = s[i].x24s8 & 0xff;
 702 }
 703
 704 void
 705 _mesa_unpack_ubyte_stencil_row(mesa_format format, GLuint n,
 706                                const void *src, GLubyte *dst)
 707 {
 708    switch (format) {
 709    case MESA_FORMAT_S_UINT8:
 710       unpack_ubyte_s_S_UINT8(src, dst, n);
 711       break;
 712    case MESA_FORMAT_S8_UINT_Z24_UNORM:
 713       unpack_ubyte_s_S8_UINT_Z24_UNORM(src, dst, n);
 714       break;
 715    case MESA_FORMAT_Z24_UNORM_S8_UINT:
 716       unpack_ubyte_s_Z24_UNORM_S8_UINT(src, dst, n);
 717       break;
 718    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
 719       unpack_ubyte_s_Z32_FLOAT_S8X24_UINT(src, dst, n);
 720       break;
 721    default:
 722       _mesa_problem(NULL, "bad format %s in _mesa_unpack_ubyte_s_row",
 723                     _mesa_get_format_name(format));
 724       return;
 725    }
 726 }
 727
 728 static void
 729 unpack_uint_24_8_depth_stencil_Z24_UNORM_S8_UINT(const GLuint *src, GLuint *dst, GLuint n)
 730 {
 731    GLuint i;
 732
 733    for (i = 0; i < n; i++) {
 734       GLuint val = src[i];
 735       dst[i] = val >> 24 | val << 8;
 736    }
 737 }
 738
 739 static void
 740 unpack_uint_24_8_depth_stencil_Z32_S8X24(const GLuint *src,
 741                                          GLuint *dst, GLuint n)
 742 {
 743    GLuint i;
 744
 745    for (i = 0; i < n; i++) {
 746       /* 8 bytes per pixel (float + uint32) */
 747       GLfloat zf = ((GLfloat *) src)[i * 2 + 0];
 748       GLuint z24 = (GLuint) (zf * (GLfloat) 0xffffff);
 749       GLuint s = src[i * 2 + 1] & 0xff;
 750       dst[i] = (z24 << 8) | s;
 751    }
 752 }
 753
 754 static void
 755 unpack_uint_24_8_depth_stencil_S8_UINT_Z24_UNORM(const GLuint *src, GLuint *dst, GLuint n)
 756 {
 757    memcpy(dst, src, n * 4);
 758 }
 759
 760 /**
 761  * Unpack depth/stencil returning as GL_UNSIGNED_INT_24_8.
 762  * \param format  the source data format
 763  */
 764 void
 765 _mesa_unpack_uint_24_8_depth_stencil_row(mesa_format format, GLuint n,
 766                                          const void *src, GLuint *dst)
 767 {
 768    switch (format) {
 769    case MESA_FORMAT_S8_UINT_Z24_UNORM:
 770       unpack_uint_24_8_depth_stencil_S8_UINT_Z24_UNORM(src, dst, n);
 771       break;
 772    case MESA_FORMAT_Z24_UNORM_S8_UINT:
 773       unpack_uint_24_8_depth_stencil_Z24_UNORM_S8_UINT(src, dst, n);
 774       break;
 775    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
 776       unpack_uint_24_8_depth_stencil_Z32_S8X24(src, dst, n);
 777       break;
 778    default:
 779       _mesa_problem(NULL,
 780                     "bad format %s in _mesa_unpack_uint_24_8_depth_stencil_row",
 781                     _mesa_get_format_name(format));
 782       return;
 783    }
 784 }
 785
 786 static void
 787 unpack_float_32_uint_24_8_Z24_UNORM_S8_UINT(const GLuint *src,
 788                                             GLuint *dst, GLuint n)
 789 {
 790    GLuint i;
 791    struct z32f_x24s8 *d = (struct z32f_x24s8 *) dst;
 792    const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
 793
 794    for (i = 0; i < n; i++) {
 795       const GLuint z24 = src[i] & 0xffffff;
 796       d[i].z = z24 * scale;
 797       d[i].x24s8 = src[i] >> 24;
 798       assert(d[i].z >= 0.0f);
 799       assert(d[i].z <= 1.0f);
 800    }
 801 }
 802
 803 static void
 804 unpack_float_32_uint_24_8_Z32_FLOAT_S8X24_UINT(const GLuint *src,
 805                                                GLuint *dst, GLuint n)
 806 {
 807    memcpy(dst, src, n * sizeof(struct z32f_x24s8));
 808 }
 809
 810 static void
 811 unpack_float_32_uint_24_8_S8_UINT_Z24_UNORM(const GLuint *src,
 812                                             GLuint *dst, GLuint n)
 813 {
 814    GLuint i;
 815    struct z32f_x24s8 *d = (struct z32f_x24s8 *) dst;
 816    const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
 817
 818    for (i = 0; i < n; i++) {
 819       const GLuint z24 = src[i] >> 8;
 820       d[i].z = z24 * scale;
 821       d[i].x24s8 = src[i] & 0xff;
 822       assert(d[i].z >= 0.0f);
 823       assert(d[i].z <= 1.0f);
 824    }
 825 }
 826
 827 /**
 828  * Unpack depth/stencil returning as GL_FLOAT_32_UNSIGNED_INT_24_8_REV.
 829  * \param format  the source data format
 830  *
 831  * In GL_FLOAT_32_UNSIGNED_INT_24_8_REV lower 4 bytes contain float
 832  * component and higher 4 bytes contain packed 24-bit and 8-bit
 833  * components.
 834  *
 835  *    31 30 29 28 ... 4 3 2 1 0    31 30 29 ... 9 8 7 6 5 ... 2 1 0
 836  *    +-------------------------+  +--------------------------------+
 837  *    |    Float Component      |  | Unused         | 8 bit stencil |
 838  *    +-------------------------+  +--------------------------------+
 839  *          lower 4 bytes                  higher 4 bytes
 840  */
 841 void
 842 _mesa_unpack_float_32_uint_24_8_depth_stencil_row(mesa_format format, GLuint n,
 843                                                   const void *src, GLuint *dst)
 844 {
 845    switch (format) {
 846    case MESA_FORMAT_S8_UINT_Z24_UNORM:
 847       unpack_float_32_uint_24_8_S8_UINT_Z24_UNORM(src, dst, n);
 848       break;
 849    case MESA_FORMAT_Z24_UNORM_S8_UINT:
 850       unpack_float_32_uint_24_8_Z24_UNORM_S8_UINT(src, dst, n);
 851       break;
 852    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
 853       unpack_float_32_uint_24_8_Z32_FLOAT_S8X24_UINT(src, dst, n);
 854       break;
 855    default:
 856       _mesa_problem(NULL,
 857                     "bad format %s in _mesa_unpack_uint_24_8_depth_stencil_row",
 858                     _mesa_get_format_name(format));
 859       return;
 860    }
 861 }
 862
 863 /**
 864  * Unpack depth/stencil
 865  * \param format  the source data format
 866  * \param type the destination data type
 867  */
 868 void
 869 _mesa_unpack_depth_stencil_row(mesa_format format, GLuint n,
 870                                const void *src, GLenum type,
 871                                GLuint *dst)
 872 {
 873    assert(type == GL_UNSIGNED_INT_24_8 ||
 874           type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV);
 875
 876    switch (type) {
 877    case GL_UNSIGNED_INT_24_8:
 878       _mesa_unpack_uint_24_8_depth_stencil_row(format, n, src, dst);
 879       break;
 880    case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
 881       _mesa_unpack_float_32_uint_24_8_depth_stencil_row(format, n, src, dst);
 882       break;
 883    default:
 884       _mesa_problem(NULL,
 885                     "bad type 0x%x in _mesa_unpack_depth_stencil_row",
 886                     type);
 887       return;
 888    }
 889 }
 890 """
 891
 892 template = Template(string);
 893
 894 print template.render(argv = argv[0:])