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