src/mesa/pipe/softpipe/sp_surface.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #include "sp_context.h"
  29 #include "sp_state.h"
  30 #include "sp_surface.h"
  31 #include "pipe/p_defines.h"
  32 #include "main/imports.h"
  33 #include "main/macros.h"
  34
  35
  36 /**
  37  * Softpipe surface functions.
  38  * Basically, create surface of a particular type, then plug in default
  39  * read/write_quad and get/put_tile() functions.
  40  * Note that these quad funcs assume the buffer/region is in a linear
  41  * layout with Y=0=top.
  42  * If we had swizzled/AOS buffers the read/write quad functions could be
  43  * simplified a lot....
  44  */
  45
  46
  47
  48 /*** PIPE_FORMAT_U_A8_R8_G8_B8 ***/
  49
  50 static void
  51 a8r8g8b8_read_quad_f_swz(struct softpipe_surface *sps, GLint x, GLint y,
  52                          GLfloat (*rrrr)[QUAD_SIZE])
  53 {
  54    const GLuint *src
  55       = ((const GLuint *) (sps->surface.region->map + sps->surface.offset))
  56       + y * sps->surface.region->pitch + x;
  57    GLuint i, j;
  58
  59    assert(sps->surface.format == PIPE_FORMAT_U_A8_R8_G8_B8);
  60    assert(x < sps->surface.width - 1);
  61    assert(y < sps->surface.height - 1);
  62
  63    for (i = 0; i < 2; i++) { /* loop over pixel row */
  64       for (j = 0; j < 2; j++) {  /* loop over pixel column */
  65          const GLuint p = src[j];
  66          rrrr[0][i * 2 + j] = UBYTE_TO_FLOAT((p >> 16) & 0xff); /*R*/
  67          rrrr[1][i * 2 + j] = UBYTE_TO_FLOAT((p >>  8) & 0xff); /*G*/
  68          rrrr[2][i * 2 + j] = UBYTE_TO_FLOAT((p      ) & 0xff); /*B*/
  69          rrrr[3][i * 2 + j] = UBYTE_TO_FLOAT((p >> 24) & 0xff); /*A*/
  70       }
  71       src += sps->surface.region->pitch;
  72    }
  73 }
  74
  75 static void
  76 a8r8g8b8_write_quad_f_swz(struct softpipe_surface *sps, GLint x, GLint y,
  77                           GLfloat (*rrrr)[QUAD_SIZE])
  78 {
  79    GLuint *dst
  80       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
  81       + y * sps->surface.region->pitch + x;
  82    GLuint i, j;
  83
  84    assert(sps->surface.format == PIPE_FORMAT_U_A8_R8_G8_B8);
  85
  86    for (i = 0; i < 2; i++) { /* loop over pixel row */
  87       for (j = 0; j < 2; j++) {  /* loop over pixel column */
  88          GLubyte r, g, b, a;
  89          UNCLAMPED_FLOAT_TO_UBYTE(r, rrrr[0][i * 2 + j]); /*R*/
  90          UNCLAMPED_FLOAT_TO_UBYTE(g, rrrr[1][i * 2 + j]); /*G*/
  91          UNCLAMPED_FLOAT_TO_UBYTE(b, rrrr[2][i * 2 + j]); /*B*/
  92          UNCLAMPED_FLOAT_TO_UBYTE(a, rrrr[3][i * 2 + j]); /*A*/
  93          dst[j] = (a << 24) | (r << 16) | (g << 8) | b;
  94       }
  95       dst += sps->surface.region->pitch;
  96    }
  97 }
  98
  99 static void
 100 a8r8g8b8_get_tile(struct pipe_surface *ps,
 101                   GLuint x, GLuint y, GLuint w, GLuint h, GLfloat *p)
 102 {
 103    const GLuint *src
 104       = ((const GLuint *) (ps->region->map + ps->offset))
 105       + y * ps->region->pitch + x;
 106    GLuint i, j;
 107
 108    assert(ps->format == PIPE_FORMAT_U_A8_R8_G8_B8);
 109
 110 #if 0
 111    assert(x + w <= ps->width);
 112    assert(y + h <= ps->height);
 113 #else
 114    /* temp hack */
 115    if (x + w > ps->width)
 116       w = ps->width - x;
 117    if (y + h > ps->height)
 118       h = ps->height -y;
 119 #endif
 120    for (i = 0; i < h; i++) {
 121       for (j = 0; j < w; j++) {
 122          const GLuint pixel = src[j];
 123          p[0] = UBYTE_TO_FLOAT((pixel >> 16) & 0xff);
 124          p[1] = UBYTE_TO_FLOAT((pixel >>  8) & 0xff);
 125          p[2] = UBYTE_TO_FLOAT((pixel >>  0) & 0xff);
 126          p[3] = UBYTE_TO_FLOAT((pixel >> 24) & 0xff);
 127          p += 4;
 128       }
 129       src += ps->region->pitch;
 130    }
 131 }
 132
 133
 134 /*** PIPE_FORMAT_U_A1_R5_G5_B5 ***/
 135
 136 static void
 137 a1r5g5b5_get_tile(struct pipe_surface *ps,
 138                   GLuint x, GLuint y, GLuint w, GLuint h, GLfloat *p)
 139 {
 140    const GLushort *src
 141       = ((const GLushort *) (ps->region->map + ps->offset))
 142       + y * ps->region->pitch + x;
 143    GLuint i, j;
 144
 145    assert(ps->format == PIPE_FORMAT_U_A1_R5_G5_B5);
 146
 147    for (i = 0; i < h; i++) {
 148       for (j = 0; j < w; j++) {
 149          const GLushort pixel = src[j];
 150          p[0] = ((pixel >> 10) & 0x1f) * (1.0 / 31);
 151          p[1] = ((pixel >>  5) & 0x1f) * (1.0 / 31);
 152          p[2] = ((pixel      ) & 0x1f) * (1.0 / 31);
 153          p[3] = ((pixel >> 15)       );
 154          p += 4;
 155       }
 156       src += ps->region->pitch;
 157    }
 158 }
 159
 160
 161
 162 /*** PIPE_FORMAT_U_Z16 ***/
 163
 164 static void
 165 z16_read_quad_z(struct softpipe_surface *sps,
 166                 GLint x, GLint y, GLuint zzzz[QUAD_SIZE])
 167 {
 168    const GLushort *src
 169       = ((const GLushort *) (sps->surface.region->map + sps->surface.offset))
 170       + y * sps->surface.region->pitch + x;
 171
 172    assert(sps->surface.format == PIPE_FORMAT_U_Z16);
 173
 174    /* converting GLushort to GLuint: */
 175    zzzz[0] = src[0];
 176    zzzz[1] = src[1];
 177    src += sps->surface.region->pitch;
 178    zzzz[2] = src[0];
 179    zzzz[3] = src[1];
 180 }
 181
 182 static void
 183 z16_write_quad_z(struct softpipe_surface *sps,
 184                  GLint x, GLint y, const GLuint zzzz[QUAD_SIZE])
 185 {
 186    GLushort *dst
 187       = ((GLushort *) (sps->surface.region->map + sps->surface.offset))
 188       + y * sps->surface.region->pitch + x;
 189
 190    assert(sps->surface.format == PIPE_FORMAT_U_Z16);
 191
 192    /* converting GLuint to GLushort: */
 193    dst[0] = zzzz[0];
 194    dst[1] = zzzz[1];
 195    dst += sps->surface.region->pitch;
 196    dst[0] = zzzz[2];
 197    dst[1] = zzzz[3];
 198 }
 199
 200
 201 /*** PIPE_FORMAT_U_Z32 ***/
 202
 203 static void
 204 z32_read_quad_z(struct softpipe_surface *sps,
 205                 GLint x, GLint y, GLuint zzzz[QUAD_SIZE])
 206 {
 207    const GLuint *src
 208       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
 209       + y * sps->surface.region->pitch + x;
 210
 211    assert(sps->surface.format == PIPE_FORMAT_U_Z32);
 212
 213    zzzz[0] = src[0];
 214    zzzz[1] = src[1];
 215    src += sps->surface.region->pitch;
 216    zzzz[2] = src[0];
 217    zzzz[3] = src[1];
 218 }
 219
 220 static void
 221 z32_write_quad_z(struct softpipe_surface *sps,
 222                  GLint x, GLint y, const GLuint zzzz[QUAD_SIZE])
 223 {
 224    GLuint *dst
 225       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
 226       + y * sps->surface.region->pitch + x;
 227
 228    assert(sps->surface.format == PIPE_FORMAT_U_Z32);
 229
 230    dst[0] = zzzz[0];
 231    dst[1] = zzzz[1];
 232    dst += sps->surface.region->pitch;
 233    dst[0] = zzzz[2];
 234    dst[1] = zzzz[3];
 235 }
 236
 237
 238 /*** PIPE_FORMAT_S8_Z24 ***/
 239
 240 static void
 241 s8z24_read_quad_z(struct softpipe_surface *sps,
 242                   GLint x, GLint y, GLuint zzzz[QUAD_SIZE])
 243 {
 244    static const GLuint mask = 0x00ffffff;
 245    const GLuint *src
 246       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
 247       + y * sps->surface.region->pitch + x;
 248
 249    assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
 250
 251    /* extract lower three bytes */
 252    zzzz[0] = src[0] & mask;
 253    zzzz[1] = src[1] & mask;
 254    src += sps->surface.region->pitch;
 255    zzzz[2] = src[0] & mask;
 256    zzzz[3] = src[1] & mask;
 257 }
 258
 259 static void
 260 s8z24_write_quad_z(struct softpipe_surface *sps,
 261                    GLint x, GLint y, const GLuint zzzz[QUAD_SIZE])
 262 {
 263    static const GLuint mask = 0xff000000;
 264    GLuint *dst
 265       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
 266       + y * sps->surface.region->pitch + x;
 267
 268    assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
 269    assert(zzzz[0] <= 0xffffff);
 270
 271    dst[0] = (dst[0] & mask) | zzzz[0];
 272    dst[1] = (dst[1] & mask) | zzzz[1];
 273    dst += sps->surface.region->pitch;
 274    dst[0] = (dst[0] & mask) | zzzz[2];
 275    dst[1] = (dst[1] & mask) | zzzz[3];
 276 }
 277
 278 static void
 279 s8z24_read_quad_stencil(struct softpipe_surface *sps,
 280                         GLint x, GLint y, GLubyte ssss[QUAD_SIZE])
 281 {
 282    const GLuint *src
 283       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
 284       + y * sps->surface.region->pitch + x;
 285
 286    assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
 287
 288    ssss[0] = src[0] >> 24;
 289    ssss[1] = src[1] >> 24;
 290    src += sps->surface.region->pitch;
 291    ssss[2] = src[0] >> 24;
 292    ssss[3] = src[1] >> 24;
 293 }
 294
 295 static void
 296 s8z24_write_quad_stencil(struct softpipe_surface *sps,
 297                          GLint x, GLint y, const GLubyte ssss[QUAD_SIZE])
 298 {
 299    static const GLuint mask = 0x00ffffff;
 300    GLuint *dst
 301       = ((GLuint *) (sps->surface.region->map + sps->surface.offset))
 302       + y * sps->surface.region->pitch + x;
 303
 304    assert(sps->surface.format == PIPE_FORMAT_S8_Z24);
 305
 306    dst[0] = (dst[0] & mask) | (ssss[0] << 24);
 307    dst[1] = (dst[1] & mask) | (ssss[1] << 24);
 308    dst += sps->surface.region->pitch;
 309    dst[0] = (dst[0] & mask) | (ssss[2] << 24);
 310    dst[1] = (dst[1] & mask) | (ssss[3] << 24);
 311 }
 312
 313
 314 /*** PIPE_FORMAT_U_S8 ***/
 315
 316 static void
 317 s8_read_quad_stencil(struct softpipe_surface *sps,
 318                      GLint x, GLint y, GLubyte ssss[QUAD_SIZE])
 319 {
 320    const GLubyte *src
 321       = sps->surface.region->map + sps->surface.offset
 322       + y * sps->surface.region->pitch + x;
 323
 324    assert(sps->surface.format == PIPE_FORMAT_U_S8);
 325
 326    ssss[0] = src[0];
 327    ssss[1] = src[1];
 328    src += sps->surface.region->pitch;
 329    ssss[2] = src[0];
 330    ssss[3] = src[1];
 331 }
 332
 333 static void
 334 s8_write_quad_stencil(struct softpipe_surface *sps,
 335                       GLint x, GLint y, const GLubyte ssss[QUAD_SIZE])
 336 {
 337    GLubyte *dst
 338       = sps->surface.region->map + sps->surface.offset
 339       + y * sps->surface.region->pitch + x;
 340
 341    assert(sps->surface.format == PIPE_FORMAT_U_S8);
 342
 343    dst[0] = ssss[0];
 344    dst[1] = ssss[1];
 345    dst += sps->surface.region->pitch;
 346    dst[0] = ssss[2];
 347    dst[1] = ssss[3];
 348 }
 349
 350
 351 void
 352 softpipe_init_surface_funcs(struct softpipe_surface *sps)
 353 {
 354    switch (sps->surface.format) {
 355    case PIPE_FORMAT_U_A8_R8_G8_B8:
 356       sps->read_quad_f_swz = a8r8g8b8_read_quad_f_swz;
 357       sps->write_quad_f_swz = a8r8g8b8_write_quad_f_swz;
 358       sps->surface.get_tile = a8r8g8b8_get_tile;
 359    case PIPE_FORMAT_U_A1_R5_G5_B5:
 360       sps->surface.get_tile = a1r5g5b5_get_tile;
 361       break;
 362    case PIPE_FORMAT_U_Z16:
 363       sps->read_quad_z = z16_read_quad_z;
 364       sps->write_quad_z = z16_write_quad_z;
 365       break;
 366    case PIPE_FORMAT_U_Z32:
 367       sps->read_quad_z = z32_read_quad_z;
 368       sps->write_quad_z = z32_write_quad_z;
 369       break;
 370    case PIPE_FORMAT_S8_Z24:
 371       sps->read_quad_z = s8z24_read_quad_z;
 372       sps->write_quad_z = s8z24_write_quad_z;
 373       sps->read_quad_stencil = s8z24_read_quad_stencil;
 374       sps->write_quad_stencil = s8z24_write_quad_stencil;
 375       break;
 376    case PIPE_FORMAT_U_S8:
 377       sps->read_quad_stencil = s8_read_quad_stencil;
 378       sps->write_quad_stencil = s8_write_quad_stencil;
 379       break;
 380    default:
 381       assert(0);
 382    }
 383 }
 384
 385
 386 static struct pipe_surface *
 387 softpipe_surface_alloc(struct pipe_context *pipe, GLuint pipeFormat)
 388 {
 389    struct softpipe_surface *sps = CALLOC_STRUCT(softpipe_surface);
 390    if (!sps)
 391       return NULL;
 392
 393    assert(pipeFormat < PIPE_FORMAT_COUNT);
 394
 395    sps->surface.format = pipeFormat;
 396    sps->surface.refcount = 1;
 397    softpipe_init_surface_funcs(sps);
 398
 399    return &sps->surface;
 400 }
 401
 402
 403
 404
 405
 406 /**
 407  * Called via pipe->get_tex_surface()
 408  * XXX is this in the right place?
 409  */
 410 struct pipe_surface *
 411 softpipe_get_tex_surface(struct pipe_context *pipe,
 412                          struct pipe_mipmap_tree *mt,
 413                          GLuint face, GLuint level, GLuint zslice)
 414 {
 415    struct pipe_surface *ps;
 416    GLuint offset;  /* in bytes */
 417
 418    offset = mt->level[level].level_offset;
 419
 420    if (mt->target == GL_TEXTURE_CUBE_MAP_ARB) {
 421       offset += mt->level[level].image_offset[face] * mt->cpp;
 422    }
 423    else if (mt->target == GL_TEXTURE_3D) {
 424       offset += mt->level[level].image_offset[zslice] * mt->cpp;
 425    }
 426    else {
 427       assert(face == 0);
 428       assert(zslice == 0);
 429    }
 430
 431    ps = pipe->surface_alloc(pipe, mt->format);
 432    if (ps) {
 433       assert(ps->format);
 434       assert(ps->refcount);
 435       ps->region = mt->region;
 436       ps->width = mt->level[level].width;
 437       ps->height = mt->level[level].height;
 438       ps->offset = offset;
 439    }
 440    return ps;
 441 }
 442
 443
 444 void
 445 sp_init_surface_functions(struct softpipe_context *sp)
 446 {
 447    sp->pipe.surface_alloc = softpipe_surface_alloc;
 448 }