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_draw.h"
  50 #include "st_gen_mipmap.h"
  51 #include "st_program.h"
  52 #include "st_texture.h"
  53 #include "st_cb_texture.h"
  54 #include "st_inlines.h"
  55
  56
  57 /**
  58  * one-time init for generate mipmap
  59  * XXX Note: there may be other times we need no-op/simple state like this.
  60  * In that case, some code refactoring would be good.
  61  */
  62 void
  63 st_init_generate_mipmap(struct st_context *st)
  64 {
  65    st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
  66 }
  67
  68
  69 void
  70 st_destroy_generate_mipmap(struct st_context *st)
  71 {
  72    util_destroy_gen_mipmap(st->gen_mipmap);
  73    st->gen_mipmap = NULL;
  74 }
  75
  76
  77 /**
  78  * Generate mipmap levels using hardware rendering.
  79  * \return TRUE if successful, FALSE if not possible
  80  */
  81 static boolean
  82 st_render_mipmap(struct st_context *st,
  83                  GLenum target,
  84                  struct pipe_texture *pt,
  85                  uint baseLevel, uint lastLevel)
  86 {
  87    struct pipe_context *pipe = st->pipe;
  88    struct pipe_screen *screen = pipe->screen;
  89    const uint face = _mesa_tex_target_to_face(target);
  90
  91    assert(target != GL_TEXTURE_3D); /* not done yet */
  92
  93    /* check if we can render in the texture's format */
  94    if (!screen->is_format_supported(screen, pt->format, pt->target,
  95                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
  96       return FALSE;
  97    }
  98
  99    util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
 100                    PIPE_TEX_FILTER_LINEAR);
 101
 102    return TRUE;
 103 }
 104
 105
 106 static void
 107 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 108                          struct gl_texture_object *texObj)
 109 {
 110    struct pipe_context *pipe = ctx->st->pipe;
 111    struct pipe_screen *screen = pipe->screen;
 112    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 113    const uint baseLevel = texObj->BaseLevel;
 114    const uint lastLevel = pt->last_level;
 115    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 116    uint dstLevel;
 117    GLenum datatype;
 118    GLuint comps;
 119
 120    if (ST_DEBUG & DEBUG_FALLBACK)
 121       debug_printf("%s: fallback processing\n", __FUNCTION__);
 122
 123    assert(target != GL_TEXTURE_3D); /* not done yet */
 124
 125    _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 126                                   &datatype, &comps);
 127
 128    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 129       const uint srcLevel = dstLevel - 1;
 130       struct pipe_transfer *srcTrans, *dstTrans;
 131       const ubyte *srcData;
 132       ubyte *dstData;
 133       int srcStride, dstStride;
 134
 135       srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 136                                                 srcLevel, zslice,
 137                                                 PIPE_TRANSFER_READ, 0, 0,
 138                                                 u_minify(pt->width0, srcLevel),
 139                                                 u_minify(pt->height0, srcLevel));
 140
 141       dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 142                                                 dstLevel, zslice,
 143                                                 PIPE_TRANSFER_WRITE, 0, 0,
 144                                                 u_minify(pt->width0, dstLevel),
 145                                                 u_minify(pt->height0, dstLevel));
 146
 147       srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
 148       dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
 149
 150       srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->texture->format);
 151       dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->texture->format);
 152
 153       _mesa_generate_mipmap_level(target, datatype, comps,
 154                                   0 /*border*/,
 155                                   u_minify(pt->width0, srcLevel),
 156                                   u_minify(pt->height0, srcLevel),
 157                                   u_minify(pt->depth0, srcLevel),
 158                                   srcData,
 159                                   srcStride, /* stride in texels */
 160                                   u_minify(pt->width0, dstLevel),
 161                                   u_minify(pt->height0, dstLevel),
 162                                   u_minify(pt->depth0, dstLevel),
 163                                   dstData,
 164                                   dstStride); /* stride in texels */
 165
 166       screen->transfer_unmap(screen, srcTrans);
 167       screen->transfer_unmap(screen, dstTrans);
 168
 169       screen->tex_transfer_destroy(srcTrans);
 170       screen->tex_transfer_destroy(dstTrans);
 171    }
 172 }
 173
 174
 175 /**
 176  * Compute the expected number of mipmap levels in the texture given
 177  * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
 178  * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
 179  * level should be generated.
 180  */
 181 static GLuint
 182 compute_num_levels(GLcontext *ctx,
 183                    struct gl_texture_object *texObj,
 184                    GLenum target)
 185 {
 186    if (target == GL_TEXTURE_RECTANGLE_ARB) {
 187       return 1;
 188    }
 189    else {
 190       const GLuint maxLevels = texObj->MaxLevel - texObj->BaseLevel + 1;
 191       const struct gl_texture_image *baseImage =
 192          _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
 193       GLuint size, numLevels;
 194
 195       size = MAX2(baseImage->Width2, baseImage->Height2);
 196       size = MAX2(size, baseImage->Depth2);
 197
 198       numLevels = 0;
 199
 200       while (size > 0) {
 201          numLevels++;
 202          size >>= 1;
 203       }
 204
 205       numLevels = MIN2(numLevels, maxLevels);
 206
 207       return numLevels;
 208    }
 209 }
 210
 211
 212 void
 213 st_generate_mipmap(GLcontext *ctx, GLenum target,
 214                    struct gl_texture_object *texObj)
 215 {
 216    struct st_context *st = ctx->st;
 217    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 218    const uint baseLevel = texObj->BaseLevel;
 219    uint lastLevel;
 220    uint dstLevel;
 221
 222    if (!pt)
 223       return;
 224
 225    /* find expected last mipmap level */
 226    lastLevel = compute_num_levels(ctx, texObj, target) - 1;
 227
 228    if (lastLevel == 0)
 229       return;
 230
 231    if (pt->last_level < lastLevel) {
 232       /* The current gallium texture doesn't have space for all the
 233        * mipmap levels we need to generate.  So allocate a new texture.
 234        */
 235       struct st_texture_object *stObj = st_texture_object(texObj);
 236       struct pipe_texture *oldTex = stObj->pt;
 237       GLboolean needFlush;
 238
 239       /* create new texture with space for more levels */
 240       stObj->pt = st_texture_create(st,
 241                                     oldTex->target,
 242                                     oldTex->format,
 243                                     lastLevel,
 244                                     oldTex->width0,
 245                                     oldTex->height0,
 246                                     oldTex->depth0,
 247                                     oldTex->tex_usage);
 248
 249       /* The texture isn't in a "complete" state yet so set the expected
 250        * lastLevel here, since it won't get done in st_finalize_texture().
 251        */
 252       stObj->lastLevel = lastLevel;
 253
 254       /* This will copy the old texture's base image into the new texture
 255        * which we just allocated.
 256        */
 257       st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
 258
 259       /* release the old tex (will likely be freed too) */
 260       pipe_texture_reference(&oldTex, NULL);
 261
 262       pt = stObj->pt;
 263    }
 264
 265    assert(lastLevel <= pt->last_level);
 266
 267    /* Recall that the Mesa BaseLevel image is stored in the gallium
 268     * texture's level[0] position.  So pass baseLevel=0 here.
 269     */
 270    if (!st_render_mipmap(st, target, pt, 0, lastLevel)) {
 271       fallback_generate_mipmap(ctx, target, texObj);
 272    }
 273
 274    /* Fill in the Mesa gl_texture_image fields */
 275    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 276       const uint srcLevel = dstLevel - 1;
 277       const struct gl_texture_image *srcImage
 278          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 279       struct gl_texture_image *dstImage;
 280       struct st_texture_image *stImage;
 281       uint dstWidth = u_minify(pt->width0, dstLevel);
 282       uint dstHeight = u_minify(pt->height0, dstLevel);
 283       uint dstDepth = u_minify(pt->depth0, dstLevel);
 284       uint border = srcImage->Border;
 285
 286       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 287       if (!dstImage) {
 288          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 289          return;
 290       }
 291
 292       /* Free old image data */
 293       if (dstImage->Data)
 294          ctx->Driver.FreeTexImageData(ctx, dstImage);
 295
 296       /* initialize new image */
 297       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 298                                  dstDepth, border, srcImage->InternalFormat);
 299
 300       dstImage->TexFormat = srcImage->TexFormat;
 301
 302       stImage = (struct st_texture_image *) dstImage;
 303       pipe_texture_reference(&stImage->pt, pt);
 304    }
 305 }