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/macros.h"
  31 #include "main/mipmap.h"
  32 #include "main/teximage.h"
  33 #include "main/texformat.h"
  34
  35 #include "shader/prog_instruction.h"
  36
  37 #include "pipe/p_context.h"
  38 #include "pipe/p_defines.h"
  39 #include "pipe/p_inlines.h"
  40 #include "util/u_format.h"
  41 #include "util/u_gen_mipmap.h"
  42 #include "util/u_math.h"
  43
  44 #include "cso_cache/cso_cache.h"
  45 #include "cso_cache/cso_context.h"
  46
  47 #include "st_debug.h"
  48 #include "st_context.h"
  49 #include "st_gen_mipmap.h"
  50 #include "st_texture.h"
  51 #include "st_cb_texture.h"
  52 #include "st_inlines.h"
  53
  54
  55 /**
  56  * one-time init for generate mipmap
  57  * XXX Note: there may be other times we need no-op/simple state like this.
  58  * In that case, some code refactoring would be good.
  59  */
  60 void
  61 st_init_generate_mipmap(struct st_context *st)
  62 {
  63    st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
  64 }
  65
  66
  67 void
  68 st_destroy_generate_mipmap(struct st_context *st)
  69 {
  70    util_destroy_gen_mipmap(st->gen_mipmap);
  71    st->gen_mipmap = NULL;
  72 }
  73
  74
  75 /**
  76  * Generate mipmap levels using hardware rendering.
  77  * \return TRUE if successful, FALSE if not possible
  78  */
  79 static boolean
  80 st_render_mipmap(struct st_context *st,
  81                  GLenum target,
  82                  struct pipe_texture *pt,
  83                  uint baseLevel, uint lastLevel)
  84 {
  85    struct pipe_context *pipe = st->pipe;
  86    struct pipe_screen *screen = pipe->screen;
  87    const uint face = _mesa_tex_target_to_face(target);
  88
  89    assert(target != GL_TEXTURE_3D); /* not done yet */
  90
  91    /* check if we can render in the texture's format */
  92    if (!screen->is_format_supported(screen, pt->format, pt->target,
  93                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
  94       return FALSE;
  95    }
  96
  97    util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
  98                    PIPE_TEX_FILTER_LINEAR);
  99
 100    return TRUE;
 101 }
 102
 103
 104 static void
 105 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 106                          struct gl_texture_object *texObj)
 107 {
 108    struct pipe_context *pipe = ctx->st->pipe;
 109    struct pipe_screen *screen = pipe->screen;
 110    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 111    const uint baseLevel = texObj->BaseLevel;
 112    const uint lastLevel = pt->last_level;
 113    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 114    uint dstLevel;
 115    GLenum datatype;
 116    GLuint comps;
 117
 118    if (ST_DEBUG & DEBUG_FALLBACK)
 119       debug_printf("%s: fallback processing\n", __FUNCTION__);
 120
 121    assert(target != GL_TEXTURE_3D); /* not done yet */
 122
 123    _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 124                                   &datatype, &comps);
 125
 126    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 127       const uint srcLevel = dstLevel - 1;
 128       struct pipe_transfer *srcTrans, *dstTrans;
 129       const ubyte *srcData;
 130       ubyte *dstData;
 131       int srcStride, dstStride;
 132
 133       srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 134                                                 srcLevel, zslice,
 135                                                 PIPE_TRANSFER_READ, 0, 0,
 136                                                 u_minify(pt->width0, srcLevel),
 137                                                 u_minify(pt->height0, srcLevel));
 138
 139       dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 140                                                 dstLevel, zslice,
 141                                                 PIPE_TRANSFER_WRITE, 0, 0,
 142                                                 u_minify(pt->width0, dstLevel),
 143                                                 u_minify(pt->height0, dstLevel));
 144
 145       srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
 146       dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
 147
 148       srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->texture->format);
 149       dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->texture->format);
 150
 151       _mesa_generate_mipmap_level(target, datatype, comps,
 152                                   0 /*border*/,
 153                                   u_minify(pt->width0, srcLevel),
 154                                   u_minify(pt->height0, srcLevel),
 155                                   u_minify(pt->depth0, srcLevel),
 156                                   srcData,
 157                                   srcStride, /* stride in texels */
 158                                   u_minify(pt->width0, dstLevel),
 159                                   u_minify(pt->height0, dstLevel),
 160                                   u_minify(pt->depth0, dstLevel),
 161                                   dstData,
 162                                   dstStride); /* stride in texels */
 163
 164       screen->transfer_unmap(screen, srcTrans);
 165       screen->transfer_unmap(screen, dstTrans);
 166
 167       screen->tex_transfer_destroy(srcTrans);
 168       screen->tex_transfer_destroy(dstTrans);
 169    }
 170 }
 171
 172
 173 /**
 174  * Compute the expected number of mipmap levels in the texture given
 175  * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
 176  * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
 177  * level should be generated.
 178  */
 179 static GLuint
 180 compute_num_levels(GLcontext *ctx,
 181                    struct gl_texture_object *texObj,
 182                    GLenum target)
 183 {
 184    if (target == GL_TEXTURE_RECTANGLE_ARB) {
 185       return 1;
 186    }
 187    else {
 188       const GLuint maxLevels = texObj->MaxLevel - texObj->BaseLevel + 1;
 189       const struct gl_texture_image *baseImage =
 190          _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
 191       GLuint size, numLevels;
 192
 193       size = MAX2(baseImage->Width2, baseImage->Height2);
 194       size = MAX2(size, baseImage->Depth2);
 195
 196       numLevels = 0;
 197
 198       while (size > 0) {
 199          numLevels++;
 200          size >>= 1;
 201       }
 202
 203       numLevels = MIN2(numLevels, maxLevels);
 204
 205       return numLevels;
 206    }
 207 }
 208
 209
 210 void
 211 st_generate_mipmap(GLcontext *ctx, GLenum target,
 212                    struct gl_texture_object *texObj)
 213 {
 214    struct st_context *st = ctx->st;
 215    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 216    const uint baseLevel = texObj->BaseLevel;
 217    uint lastLevel;
 218    uint dstLevel;
 219
 220    if (!pt)
 221       return;
 222
 223    /* find expected last mipmap level */
 224    lastLevel = compute_num_levels(ctx, texObj, target) - 1;
 225
 226    if (lastLevel == 0)
 227       return;
 228
 229    if (pt->last_level < lastLevel) {
 230       /* The current gallium texture doesn't have space for all the
 231        * mipmap levels we need to generate.  So allocate a new texture.
 232        */
 233       struct st_texture_object *stObj = st_texture_object(texObj);
 234       struct pipe_texture *oldTex = stObj->pt;
 235       GLboolean needFlush;
 236
 237       /* create new texture with space for more levels */
 238       stObj->pt = st_texture_create(st,
 239                                     oldTex->target,
 240                                     oldTex->format,
 241                                     lastLevel,
 242                                     oldTex->width0,
 243                                     oldTex->height0,
 244                                     oldTex->depth0,
 245                                     oldTex->tex_usage);
 246
 247       /* The texture isn't in a "complete" state yet so set the expected
 248        * lastLevel here, since it won't get done in st_finalize_texture().
 249        */
 250       stObj->lastLevel = lastLevel;
 251
 252       /* This will copy the old texture's base image into the new texture
 253        * which we just allocated.
 254        */
 255       st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
 256
 257       /* release the old tex (will likely be freed too) */
 258       pipe_texture_reference(&oldTex, NULL);
 259
 260       pt = stObj->pt;
 261    }
 262
 263    assert(lastLevel <= pt->last_level);
 264
 265    /* Recall that the Mesa BaseLevel image is stored in the gallium
 266     * texture's level[0] position.  So pass baseLevel=0 here.
 267     */
 268    if (!st_render_mipmap(st, target, pt, 0, lastLevel)) {
 269       fallback_generate_mipmap(ctx, target, texObj);
 270    }
 271
 272    /* Fill in the Mesa gl_texture_image fields */
 273    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 274       const uint srcLevel = dstLevel - 1;
 275       const struct gl_texture_image *srcImage
 276          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 277       struct gl_texture_image *dstImage;
 278       struct st_texture_image *stImage;
 279       uint dstWidth = u_minify(pt->width0, dstLevel);
 280       uint dstHeight = u_minify(pt->height0, dstLevel);
 281       uint dstDepth = u_minify(pt->depth0, dstLevel);
 282       uint border = srcImage->Border;
 283
 284       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 285       if (!dstImage) {
 286          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 287          return;
 288       }
 289
 290       /* Free old image data */
 291       if (dstImage->Data)
 292          ctx->Driver.FreeTexImageData(ctx, dstImage);
 293
 294       /* initialize new image */
 295       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 296                                  dstDepth, border, srcImage->InternalFormat);
 297
 298       dstImage->TexFormat = srcImage->TexFormat;
 299
 300       stImage = (struct st_texture_image *) dstImage;
 301       pipe_texture_reference(&stImage->pt, pt);
 302    }
 303 }