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  * Software fallback for generate mipmap levels.
  99  */
 100 static void
 101 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 102                          struct gl_texture_object *texObj)
 103 {
 104    struct pipe_context *pipe = st_context(ctx)->pipe;
 105    struct pipe_resource *pt = st_get_texobj_resource(texObj);
 106    const uint baseLevel = texObj->BaseLevel;
 107    const uint lastLevel = pt->last_level;
 108    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 109    uint dstLevel;
 110    GLenum datatype;
 111    GLuint comps;
 112
 113    if (ST_DEBUG & DEBUG_FALLBACK)
 114       debug_printf("%s: fallback processing\n", __FUNCTION__);
 115
 116    assert(target != GL_TEXTURE_3D); /* not done yet */
 117
 118    _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 119                                   &datatype, &comps);
 120
 121    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 122       const uint srcLevel = dstLevel - 1;
 123       const uint srcWidth = u_minify(pt->width0, srcLevel);
 124       const uint srcHeight = u_minify(pt->height0, srcLevel);
 125       const uint srcDepth = u_minify(pt->depth0, srcLevel);
 126       const uint dstWidth = u_minify(pt->width0, dstLevel);
 127       const uint dstHeight = u_minify(pt->height0, dstLevel);
 128       const uint dstDepth = u_minify(pt->depth0, dstLevel);
 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                                                 srcWidth, srcHeight);
 138
 139
 140       dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 141                                                 dstLevel, zslice,
 142                                                 PIPE_TRANSFER_WRITE, 0, 0,
 143                                                 dstWidth, dstHeight);
 144
 145       srcData = (ubyte *) pipe_transfer_map(pipe, srcTrans);
 146       dstData = (ubyte *) pipe_transfer_map(pipe, dstTrans);
 147
 148       srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->resource->format);
 149       dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->resource->format);
 150
 151       _mesa_generate_mipmap_level(target, datatype, comps,
 152                                   0 /*border*/,
 153                                   srcWidth, srcHeight, srcDepth,
 154                                   srcData,
 155                                   srcStride, /* stride in texels */
 156                                   dstWidth, dstHeight, dstDepth,
 157                                   dstData,
 158                                   dstStride); /* stride in texels */
 159
 160       pipe_transfer_unmap(pipe, srcTrans);
 161       pipe_transfer_unmap(pipe, dstTrans);
 162
 163       pipe->transfer_destroy(pipe, srcTrans);
 164       pipe->transfer_destroy(pipe, 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  * levels 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 /**
 207  * Called via ctx->Driver.GenerateMipmap().
 208  */
 209 void
 210 st_generate_mipmap(GLcontext *ctx, GLenum target,
 211                    struct gl_texture_object *texObj)
 212 {
 213    struct st_context *st = st_context(ctx);
 214    struct st_texture_object *stObj = st_texture_object(texObj);
 215    struct pipe_resource *pt = st_get_texobj_resource(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 pipe_resource *oldTex = stObj->pt;
 234       GLboolean needFlush;
 235
 236       /* create new texture with space for more levels */
 237       stObj->pt = st_texture_create(st,
 238                                     oldTex->target,
 239                                     oldTex->format,
 240                                     lastLevel,
 241                                     oldTex->width0,
 242                                     oldTex->height0,
 243                                     oldTex->depth0,
 244                                     oldTex->bind);
 245
 246       /* The texture isn't in a "complete" state yet so set the expected
 247        * lastLevel here, since it won't get done in st_finalize_texture().
 248        */
 249       stObj->lastLevel = lastLevel;
 250
 251       /* This will copy the old texture's base image into the new texture
 252        * which we just allocated.
 253        */
 254       st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
 255
 256       /* release the old tex (will likely be freed too) */
 257       pipe_resource_reference(&oldTex, NULL);
 258       pipe_sampler_view_reference(&stObj->sampler_view, 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, stObj, 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_resource_reference(&stImage->pt, pt);
 302    }
 303 }