src/mesa/state_tracker/st_gen_mipmap.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 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 #include "main/imports.h"
  30 #include "main/mipmap.h"
  31 #include "main/teximage.h"
  32 #include "main/texformat.h"
  33
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_defines.h"
  36 #include "util/u_inlines.h"
  37 #include "util/u_format.h"
  38 #include "util/u_gen_mipmap.h"
  39
  40 #include "st_debug.h"
  41 #include "st_context.h"
  42 #include "st_gen_mipmap.h"
  43 #include "st_cb_texture.h"
  44 #include "st_inlines.h"
  45
  46
  47 /**
  48  * one-time init for generate mipmap
  49  * XXX Note: there may be other times we need no-op/simple state like this.
  50  * In that case, some code refactoring would be good.
  51  */
  52 void
  53 st_init_generate_mipmap(struct st_context *st)
  54 {
  55    st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
  56 }
  57
  58
  59 void
  60 st_destroy_generate_mipmap(struct st_context *st)
  61 {
  62    util_destroy_gen_mipmap(st->gen_mipmap);
  63    st->gen_mipmap = NULL;
  64 }
  65
  66
  67 /**
  68  * Generate mipmap levels using hardware rendering.
  69  * \return TRUE if successful, FALSE if not possible
  70  */
  71 static boolean
  72 st_render_mipmap(struct st_context *st,
  73                  GLenum target,
  74                  struct st_texture_object *stObj,
  75                  uint baseLevel, uint lastLevel)
  76 {
  77    struct pipe_context *pipe = st->pipe;
  78    struct pipe_screen *screen = pipe->screen;
  79    struct pipe_sampler_view *psv = st_get_texture_sampler_view(stObj, pipe);
  80    const uint face = _mesa_tex_target_to_face(target);
  81
  82    assert(target != GL_TEXTURE_3D); /* not done yet */
  83
  84    /* check if we can render in the texture's format */
  85    if (!screen->is_format_supported(screen, psv->format, psv->texture->target,
  86                                     PIPE_BIND_RENDER_TARGET, 0)) {
  87       return FALSE;
  88    }
  89
  90    util_gen_mipmap(st->gen_mipmap, psv, face, baseLevel, lastLevel,
  91                    PIPE_TEX_FILTER_LINEAR);
  92
  93    return TRUE;
  94 }
  95
  96
  97 /**
  98  * Helper function to decompress an image.  The result is a 32-bpp RGBA
  99  * image with stride==width.
 100  */
 101 static void
 102 decompress_image(enum pipe_format format,
 103                  const uint8_t *src, uint8_t *dst,
 104                  unsigned width, unsigned height)
 105 {
 106    const struct util_format_description *desc = util_format_description(format);
 107    const uint bw = util_format_get_blockwidth(format);
 108    const uint src_stride = align(width, bw) / util_format_get_blocksize(format);
 109    const uint dst_stride = 4 * width;
 110
 111    /*
 112    printf("decompress %s %d x %d  %d -> %d\n",
 113           util_format_name(format), width, height, src_stride, dst_stride);
 114    */
 115
 116    desc->unpack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
 117 }
 118
 119
 120 /**
 121  * Helper function to compress an image.  The source is a 32-bpp RGBA image
 122  * with stride==width.
 123  */
 124 static void
 125 compress_image(enum pipe_format format,
 126                const uint8_t *src, uint8_t *dst,
 127                unsigned width, unsigned height)
 128 {
 129    const struct util_format_description *desc = util_format_description(format);
 130    const uint bw = util_format_get_blockwidth(format);
 131    const uint src_stride = 4 * width;
 132    const uint dst_stride = align(width, bw) / util_format_get_blocksize(format);
 133
 134    /*
 135    printf("compress %s %d x %d   %d -> %d\n",
 136           util_format_name(format), width, height, src_stride, dst_stride);
 137    */
 138
 139    desc->pack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
 140 }
 141
 142
 143 /**
 144  * Software fallback for generate mipmap levels.
 145  */
 146 static void
 147 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 148                          struct gl_texture_object *texObj)
 149 {
 150    struct pipe_context *pipe = st_context(ctx)->pipe;
 151    struct pipe_resource *pt = st_get_texobj_resource(texObj);
 152    const uint baseLevel = texObj->BaseLevel;
 153    const uint lastLevel = pt->last_level;
 154    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 155    uint dstLevel;
 156    GLenum datatype;
 157    GLuint comps;
 158    GLboolean compressed;
 159
 160    if (ST_DEBUG & DEBUG_FALLBACK)
 161       debug_printf("%s: fallback processing\n", __FUNCTION__);
 162
 163    assert(target != GL_TEXTURE_3D); /* not done yet */
 164
 165    compressed =
 166       _mesa_is_format_compressed(texObj->Image[face][baseLevel]->TexFormat);
 167
 168    if (compressed) {
 169       datatype = GL_UNSIGNED_BYTE;
 170       comps = 4;
 171    }
 172    else {
 173       _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 174                                      &datatype, &comps);
 175       assert(comps > 0 && "bad texture format in fallback_generate_mipmap()");
 176    }
 177
 178    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 179       const uint srcLevel = dstLevel - 1;
 180       const uint srcWidth = u_minify(pt->width0, srcLevel);
 181       const uint srcHeight = u_minify(pt->height0, srcLevel);
 182       const uint srcDepth = u_minify(pt->depth0, srcLevel);
 183       const uint dstWidth = u_minify(pt->width0, dstLevel);
 184       const uint dstHeight = u_minify(pt->height0, dstLevel);
 185       const uint dstDepth = u_minify(pt->depth0, dstLevel);
 186       struct pipe_transfer *srcTrans, *dstTrans;
 187       const ubyte *srcData;
 188       ubyte *dstData;
 189       int srcStride, dstStride;
 190
 191       srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 192                                                 srcLevel, zslice,
 193                                                 PIPE_TRANSFER_READ, 0, 0,
 194                                                 srcWidth, srcHeight);
 195
 196
 197       dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 198                                                 dstLevel, zslice,
 199                                                 PIPE_TRANSFER_WRITE, 0, 0,
 200                                                 dstWidth, dstHeight);
 201
 202       srcData = (ubyte *) pipe_transfer_map(pipe, srcTrans);
 203       dstData = (ubyte *) pipe_transfer_map(pipe, dstTrans);
 204
 205       srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->resource->format);
 206       dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->resource->format);
 207
 208       if (compressed) {
 209          const enum pipe_format format = pt->format;
 210          const uint bw = util_format_get_blockwidth(format);
 211          const uint bh = util_format_get_blockheight(format);
 212          const uint srcWidth2 = align(srcWidth, bw);
 213          const uint srcHeight2 = align(srcHeight, bh);
 214          const uint dstWidth2 = align(dstWidth, bw);
 215          const uint dstHeight2 = align(dstHeight, bh);
 216          uint8_t *srcTemp, *dstTemp;
 217
 218          assert(comps == 4);
 219
 220          srcTemp = malloc(srcWidth2 * srcHeight2 * comps + 000);
 221          dstTemp = malloc(dstWidth2 * dstHeight2 * comps + 000);
 222
 223          /* decompress the src image: srcData -> srcTemp */
 224          decompress_image(format, srcData, srcTemp, srcWidth, srcHeight);
 225
 226          _mesa_generate_mipmap_level(target, datatype, comps,
 227                                      0 /*border*/,
 228                                      srcWidth2, srcHeight2, srcDepth,
 229                                      srcTemp,
 230                                      srcWidth2, /* stride in texels */
 231                                      dstWidth2, dstHeight2, dstDepth,
 232                                      dstTemp,
 233                                      dstWidth2); /* stride in texels */
 234
 235          /* compress the new image: dstTemp -> dstData */
 236          compress_image(format, dstTemp, dstData, dstWidth2, dstHeight2);
 237
 238          free(srcTemp);
 239          free(dstTemp);
 240       }
 241       else {
 242          _mesa_generate_mipmap_level(target, datatype, comps,
 243                                      0 /*border*/,
 244                                      srcWidth, srcHeight, srcDepth,
 245                                      srcData,
 246                                      srcStride, /* stride in texels */
 247                                      dstWidth, dstHeight, dstDepth,
 248                                      dstData,
 249                                      dstStride); /* stride in texels */
 250       }
 251
 252       pipe_transfer_unmap(pipe, srcTrans);
 253       pipe_transfer_unmap(pipe, dstTrans);
 254
 255       pipe->transfer_destroy(pipe, srcTrans);
 256       pipe->transfer_destroy(pipe, dstTrans);
 257    }
 258 }
 259
 260
 261 /**
 262  * Compute the expected number of mipmap levels in the texture given
 263  * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
 264  * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
 265  * levels should be generated.
 266  */
 267 static GLuint
 268 compute_num_levels(GLcontext *ctx,
 269                    struct gl_texture_object *texObj,
 270                    GLenum target)
 271 {
 272    if (target == GL_TEXTURE_RECTANGLE_ARB) {
 273       return 1;
 274    }
 275    else {
 276       const GLuint maxLevels = texObj->MaxLevel - texObj->BaseLevel + 1;
 277       const struct gl_texture_image *baseImage =
 278          _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
 279       GLuint size, numLevels;
 280
 281       size = MAX2(baseImage->Width2, baseImage->Height2);
 282       size = MAX2(size, baseImage->Depth2);
 283
 284       numLevels = 0;
 285
 286       while (size > 0) {
 287          numLevels++;
 288          size >>= 1;
 289       }
 290
 291       numLevels = MIN2(numLevels, maxLevels);
 292
 293       return numLevels;
 294    }
 295 }
 296
 297
 298 /**
 299  * Called via ctx->Driver.GenerateMipmap().
 300  */
 301 void
 302 st_generate_mipmap(GLcontext *ctx, GLenum target,
 303                    struct gl_texture_object *texObj)
 304 {
 305    struct st_context *st = st_context(ctx);
 306    struct st_texture_object *stObj = st_texture_object(texObj);
 307    struct pipe_resource *pt = st_get_texobj_resource(texObj);
 308    const uint baseLevel = texObj->BaseLevel;
 309    uint lastLevel;
 310    uint dstLevel;
 311
 312    if (!pt)
 313       return;
 314
 315    /* find expected last mipmap level */
 316    lastLevel = compute_num_levels(ctx, texObj, target) - 1;
 317
 318    if (lastLevel == 0)
 319       return;
 320
 321    if (pt->last_level < lastLevel) {
 322       /* The current gallium texture doesn't have space for all the
 323        * mipmap levels we need to generate.  So allocate a new texture.
 324        */
 325       struct pipe_resource *oldTex = stObj->pt;
 326       GLboolean needFlush;
 327
 328       /* create new texture with space for more levels */
 329       stObj->pt = st_texture_create(st,
 330                                     oldTex->target,
 331                                     oldTex->format,
 332                                     lastLevel,
 333                                     oldTex->width0,
 334                                     oldTex->height0,
 335                                     oldTex->depth0,
 336                                     oldTex->bind);
 337
 338       /* The texture isn't in a "complete" state yet so set the expected
 339        * lastLevel here, since it won't get done in st_finalize_texture().
 340        */
 341       stObj->lastLevel = lastLevel;
 342
 343       /* This will copy the old texture's base image into the new texture
 344        * which we just allocated.
 345        */
 346       st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
 347
 348       /* release the old tex (will likely be freed too) */
 349       pipe_resource_reference(&oldTex, NULL);
 350       pipe_sampler_view_reference(&stObj->sampler_view, NULL);
 351
 352       pt = stObj->pt;
 353    }
 354
 355    assert(lastLevel <= pt->last_level);
 356
 357    /* Recall that the Mesa BaseLevel image is stored in the gallium
 358     * texture's level[0] position.  So pass baseLevel=0 here.
 359     */
 360    if (!st_render_mipmap(st, target, stObj, 0, lastLevel)) {
 361       fallback_generate_mipmap(ctx, target, texObj);
 362    }
 363
 364    /* Fill in the Mesa gl_texture_image fields */
 365    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 366       const uint srcLevel = dstLevel - 1;
 367       const struct gl_texture_image *srcImage
 368          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 369       struct gl_texture_image *dstImage;
 370       struct st_texture_image *stImage;
 371       uint dstWidth = u_minify(pt->width0, dstLevel);
 372       uint dstHeight = u_minify(pt->height0, dstLevel);
 373       uint dstDepth = u_minify(pt->depth0, dstLevel);
 374       uint border = srcImage->Border;
 375
 376       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 377       if (!dstImage) {
 378          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 379          return;
 380       }
 381
 382       /* Free old image data */
 383       if (dstImage->Data)
 384          ctx->Driver.FreeTexImageData(ctx, dstImage);
 385
 386       /* initialize new image */
 387       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 388                                  dstDepth, border, srcImage->InternalFormat);
 389
 390       dstImage->TexFormat = srcImage->TexFormat;
 391
 392       stImage = (struct st_texture_image *) dstImage;
 393       pipe_resource_reference(&stImage->pt, pt);
 394    }
 395 }