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 dst_stride = 4 * width;
 108    const uint src_stride = util_format_get_stride(format, width);
 109
 110    desc->unpack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
 111 }
 112
 113
 114 /**
 115  * Helper function to compress an image.  The source is a 32-bpp RGBA image
 116  * with stride==width.
 117  */
 118 static void
 119 compress_image(enum pipe_format format,
 120                const uint8_t *src, uint8_t *dst,
 121                unsigned width, unsigned height)
 122 {
 123    const struct util_format_description *desc = util_format_description(format);
 124    const uint dst_stride = util_format_get_stride(format, width);
 125    const uint src_stride = 4 * width;
 126
 127    desc->pack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
 128 }
 129
 130
 131 /**
 132  * Software fallback for generate mipmap levels.
 133  */
 134 static void
 135 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 136                          struct gl_texture_object *texObj)
 137 {
 138    struct pipe_context *pipe = st_context(ctx)->pipe;
 139    struct pipe_resource *pt = st_get_texobj_resource(texObj);
 140    const uint baseLevel = texObj->BaseLevel;
 141    const uint lastLevel = pt->last_level;
 142    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 143    uint dstLevel;
 144    GLenum datatype;
 145    GLuint comps;
 146    GLboolean compressed;
 147
 148    if (ST_DEBUG & DEBUG_FALLBACK)
 149       debug_printf("%s: fallback processing\n", __FUNCTION__);
 150
 151    assert(target != GL_TEXTURE_3D); /* not done yet */
 152
 153    compressed =
 154       _mesa_is_format_compressed(texObj->Image[face][baseLevel]->TexFormat);
 155
 156    if (compressed) {
 157       datatype = GL_UNSIGNED_BYTE;
 158       comps = 4;
 159    }
 160    else {
 161       _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 162                                      &datatype, &comps);
 163       assert(comps > 0 && "bad texture format in fallback_generate_mipmap()");
 164    }
 165
 166    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 167       const uint srcLevel = dstLevel - 1;
 168       const uint srcWidth = u_minify(pt->width0, srcLevel);
 169       const uint srcHeight = u_minify(pt->height0, srcLevel);
 170       const uint srcDepth = u_minify(pt->depth0, srcLevel);
 171       const uint dstWidth = u_minify(pt->width0, dstLevel);
 172       const uint dstHeight = u_minify(pt->height0, dstLevel);
 173       const uint dstDepth = u_minify(pt->depth0, dstLevel);
 174       struct pipe_transfer *srcTrans, *dstTrans;
 175       const ubyte *srcData;
 176       ubyte *dstData;
 177       int srcStride, dstStride;
 178
 179       srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 180                                                 srcLevel, zslice,
 181                                                 PIPE_TRANSFER_READ, 0, 0,
 182                                                 srcWidth, srcHeight);
 183
 184
 185       dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 186                                                 dstLevel, zslice,
 187                                                 PIPE_TRANSFER_WRITE, 0, 0,
 188                                                 dstWidth, dstHeight);
 189
 190       srcData = (ubyte *) pipe_transfer_map(pipe, srcTrans);
 191       dstData = (ubyte *) pipe_transfer_map(pipe, dstTrans);
 192
 193       srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->resource->format);
 194       dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->resource->format);
 195
 196       if (compressed) {
 197          const enum pipe_format format = pt->format;
 198          const uint bw = util_format_get_blockwidth(format);
 199          const uint bh = util_format_get_blockheight(format);
 200          const uint srcWidth2 = align(srcWidth, bw);
 201          const uint srcHeight2 = align(srcHeight, bh);
 202          const uint dstWidth2 = align(dstWidth, bw);
 203          const uint dstHeight2 = align(dstHeight, bh);
 204          uint8_t *srcTemp, *dstTemp;
 205
 206          assert(comps == 4);
 207
 208          srcTemp = malloc(srcWidth2 * srcHeight2 * comps + 000);
 209          dstTemp = malloc(dstWidth2 * dstHeight2 * comps + 000);
 210
 211          /* decompress the src image: srcData -> srcTemp */
 212          decompress_image(format, srcData, srcTemp, srcWidth, srcHeight);
 213
 214          _mesa_generate_mipmap_level(target, datatype, comps,
 215                                      0 /*border*/,
 216                                      srcWidth2, srcHeight2, srcDepth,
 217                                      srcTemp,
 218                                      srcWidth2, /* stride in texels */
 219                                      dstWidth2, dstHeight2, dstDepth,
 220                                      dstTemp,
 221                                      dstWidth2); /* stride in texels */
 222
 223          /* compress the new image: dstTemp -> dstData */
 224          compress_image(format, dstTemp, dstData, dstWidth2, dstHeight2);
 225
 226          free(srcTemp);
 227          free(dstTemp);
 228       }
 229       else {
 230          _mesa_generate_mipmap_level(target, datatype, comps,
 231                                      0 /*border*/,
 232                                      srcWidth, srcHeight, srcDepth,
 233                                      srcData,
 234                                      srcStride, /* stride in texels */
 235                                      dstWidth, dstHeight, dstDepth,
 236                                      dstData,
 237                                      dstStride); /* stride in texels */
 238       }
 239
 240       pipe_transfer_unmap(pipe, srcTrans);
 241       pipe_transfer_unmap(pipe, dstTrans);
 242
 243       pipe->transfer_destroy(pipe, srcTrans);
 244       pipe->transfer_destroy(pipe, dstTrans);
 245    }
 246 }
 247
 248
 249 /**
 250  * Compute the expected number of mipmap levels in the texture given
 251  * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
 252  * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
 253  * levels should be generated.
 254  */
 255 static GLuint
 256 compute_num_levels(GLcontext *ctx,
 257                    struct gl_texture_object *texObj,
 258                    GLenum target)
 259 {
 260    if (target == GL_TEXTURE_RECTANGLE_ARB) {
 261       return 1;
 262    }
 263    else {
 264       const GLuint maxLevels = texObj->MaxLevel - texObj->BaseLevel + 1;
 265       const struct gl_texture_image *baseImage =
 266          _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
 267       GLuint size, numLevels;
 268
 269       size = MAX2(baseImage->Width2, baseImage->Height2);
 270       size = MAX2(size, baseImage->Depth2);
 271
 272       numLevels = 0;
 273
 274       while (size > 0) {
 275          numLevels++;
 276          size >>= 1;
 277       }
 278
 279       numLevels = MIN2(numLevels, maxLevels);
 280
 281       return numLevels;
 282    }
 283 }
 284
 285
 286 /**
 287  * Called via ctx->Driver.GenerateMipmap().
 288  */
 289 void
 290 st_generate_mipmap(GLcontext *ctx, GLenum target,
 291                    struct gl_texture_object *texObj)
 292 {
 293    struct st_context *st = st_context(ctx);
 294    struct st_texture_object *stObj = st_texture_object(texObj);
 295    struct pipe_resource *pt = st_get_texobj_resource(texObj);
 296    const uint baseLevel = texObj->BaseLevel;
 297    uint lastLevel;
 298    uint dstLevel;
 299
 300    if (!pt)
 301       return;
 302
 303    /* find expected last mipmap level */
 304    lastLevel = compute_num_levels(ctx, texObj, target) - 1;
 305
 306    if (lastLevel == 0)
 307       return;
 308
 309    if (pt->last_level < lastLevel) {
 310       /* The current gallium texture doesn't have space for all the
 311        * mipmap levels we need to generate.  So allocate a new texture.
 312        */
 313       struct pipe_resource *oldTex = stObj->pt;
 314       GLboolean needFlush;
 315
 316       /* create new texture with space for more levels */
 317       stObj->pt = st_texture_create(st,
 318                                     oldTex->target,
 319                                     oldTex->format,
 320                                     lastLevel,
 321                                     oldTex->width0,
 322                                     oldTex->height0,
 323                                     oldTex->depth0,
 324                                     oldTex->bind);
 325
 326       /* The texture isn't in a "complete" state yet so set the expected
 327        * lastLevel here, since it won't get done in st_finalize_texture().
 328        */
 329       stObj->lastLevel = lastLevel;
 330
 331       /* This will copy the old texture's base image into the new texture
 332        * which we just allocated.
 333        */
 334       st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
 335
 336       /* release the old tex (will likely be freed too) */
 337       pipe_resource_reference(&oldTex, NULL);
 338       pipe_sampler_view_reference(&stObj->sampler_view, NULL);
 339
 340       pt = stObj->pt;
 341    }
 342
 343    assert(lastLevel <= pt->last_level);
 344
 345    /* Recall that the Mesa BaseLevel image is stored in the gallium
 346     * texture's level[0] position.  So pass baseLevel=0 here.
 347     */
 348    if (!st_render_mipmap(st, target, stObj, 0, lastLevel)) {
 349       fallback_generate_mipmap(ctx, target, texObj);
 350    }
 351
 352    /* Fill in the Mesa gl_texture_image fields */
 353    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 354       const uint srcLevel = dstLevel - 1;
 355       const struct gl_texture_image *srcImage
 356          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 357       struct gl_texture_image *dstImage;
 358       struct st_texture_image *stImage;
 359       uint dstWidth = u_minify(pt->width0, dstLevel);
 360       uint dstHeight = u_minify(pt->height0, dstLevel);
 361       uint dstDepth = u_minify(pt->depth0, dstLevel);
 362       uint border = srcImage->Border;
 363
 364       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 365       if (!dstImage) {
 366          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 367          return;
 368       }
 369
 370       /* Free old image data */
 371       if (dstImage->Data)
 372          ctx->Driver.FreeTexImageData(ctx, dstImage);
 373
 374       /* initialize new image */
 375       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 376                                  dstDepth, border, srcImage->InternalFormat);
 377
 378       dstImage->TexFormat = srcImage->TexFormat;
 379
 380       stImage = (struct st_texture_image *) dstImage;
 381       pipe_resource_reference(&stImage->pt, pt);
 382    }
 383 }