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_gen_mipmap.h"
  41
  42 #include "cso_cache/cso_cache.h"
  43 #include "cso_cache/cso_context.h"
  44
  45 #include "st_debug.h"
  46 #include "st_context.h"
  47 #include "st_draw.h"
  48 #include "st_gen_mipmap.h"
  49 #include "st_program.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                                                 pt->width[srcLevel],
 137                                                 pt->height[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                                                 pt->width[dstLevel],
 143                                                 pt->height[dstLevel]);
 144
 145       srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
 146       dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
 147
 148       srcStride = srcTrans->stride / srcTrans->block.size;
 149       dstStride = dstTrans->stride / dstTrans->block.size;
 150
 151       _mesa_generate_mipmap_level(target, datatype, comps,
 152                    0 /*border*/,
 153                    pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
 154                    srcData,
 155                    srcStride, /* stride in texels */
 156                    pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
 157                    dstData,
 158                    dstStride); /* stride in texels */
 159
 160       screen->transfer_unmap(screen, srcTrans);
 161       screen->transfer_unmap(screen, dstTrans);
 162
 163       screen->tex_transfer_destroy(srcTrans);
 164       screen->tex_transfer_destroy(dstTrans);
 165    }
 166 }
 167
 168
 169 /**
 170  * Compute the expected number of mipmap levels in the texture given
 171  * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
 172  * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
 173  * level should be generated.
 174  */
 175 static GLuint
 176 compute_num_levels(GLcontext *ctx,
 177                    struct gl_texture_object *texObj,
 178                    GLenum target)
 179 {
 180    if (target == GL_TEXTURE_RECTANGLE_ARB) {
 181       return 1;
 182    }
 183    else {
 184       const GLuint maxLevels = texObj->MaxLevel - texObj->BaseLevel + 1;
 185       const struct gl_texture_image *baseImage =
 186          _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
 187       GLuint size, numLevels;
 188
 189       size = MAX2(baseImage->Width2, baseImage->Height2);
 190       size = MAX2(size, baseImage->Depth2);
 191
 192       numLevels = 0;
 193
 194       while (size > 0) {
 195          numLevels++;
 196          size >>= 1;
 197       }
 198
 199       numLevels = MIN2(numLevels, maxLevels);
 200
 201       return numLevels;
 202    }
 203 }
 204
 205
 206 void
 207 st_generate_mipmap(GLcontext *ctx, GLenum target,
 208                    struct gl_texture_object *texObj)
 209 {
 210    struct st_context *st = ctx->st;
 211    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 212    const uint baseLevel = texObj->BaseLevel;
 213    uint lastLevel;
 214    uint dstLevel;
 215
 216    if (!pt)
 217       return;
 218
 219    /* find expected last mipmap level */
 220    lastLevel = compute_num_levels(ctx, texObj, target) - 1;
 221
 222    if (pt->last_level < lastLevel) {
 223       /* The current gallium texture doesn't have space for all the
 224        * mipmap levels we need to generate.  So allocate a new texture.
 225        */
 226       struct st_texture_object *stObj = st_texture_object(texObj);
 227       struct pipe_texture *oldTex = stObj->pt;
 228       GLboolean needFlush;
 229
 230       /* create new texture with space for more levels */
 231       stObj->pt = st_texture_create(st,
 232                                     oldTex->target,
 233                                     oldTex->format,
 234                                     lastLevel,
 235                                     oldTex->width[0],
 236                                     oldTex->height[0],
 237                                     oldTex->depth[0],
 238                                     oldTex->tex_usage);
 239
 240       /* The texture isn't in a "complete" state yet so set the expected
 241        * lastLevel here, since it won't get done in st_finalize_texture().
 242        */
 243       stObj->lastLevel = lastLevel;
 244
 245       /* This will copy the old texture's base image into the new texture
 246        * which we just allocated.
 247        */
 248       st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
 249
 250       /* release the old tex (will likely be freed too) */
 251       pipe_texture_reference(&oldTex, NULL);
 252
 253       pt = stObj->pt;
 254    }
 255
 256    assert(lastLevel <= pt->last_level);
 257
 258    /* Recall that the Mesa BaseLevel image is stored in the gallium
 259     * texture's level[0] position.  So pass baseLevel=0 here.
 260     */
 261    if (!st_render_mipmap(st, target, pt, 0, lastLevel)) {
 262       fallback_generate_mipmap(ctx, target, texObj);
 263    }
 264
 265    /* Fill in the Mesa gl_texture_image fields */
 266    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 267       const uint srcLevel = dstLevel - 1;
 268       const struct gl_texture_image *srcImage
 269          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 270       struct gl_texture_image *dstImage;
 271       struct st_texture_image *stImage;
 272       uint dstWidth = pt->width[dstLevel];
 273       uint dstHeight = pt->height[dstLevel];
 274       uint dstDepth = pt->depth[dstLevel];
 275       uint border = srcImage->Border;
 276
 277       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 278       if (!dstImage) {
 279          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 280          return;
 281       }
 282
 283       /* Free old image data */
 284       if (dstImage->Data)
 285          ctx->Driver.FreeTexImageData(ctx, dstImage);
 286
 287       /* initialize new image */
 288       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 289                                  dstDepth, border, srcImage->InternalFormat);
 290
 291       dstImage->TexFormat = srcImage->TexFormat;
 292
 293       stImage = (struct st_texture_image *) dstImage;
 294       pipe_texture_reference(&stImage->pt, pt);
 295    }
 296 }