Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  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.  
  33. #include "pipe/p_context.h"
  34. #include "pipe/p_defines.h"
  35. #include "util/u_inlines.h"
  36. #include "util/u_format.h"
  37. #include "util/u_gen_mipmap.h"
  38.  
  39. #include "st_debug.h"
  40. #include "st_context.h"
  41. #include "st_texture.h"
  42. #include "st_gen_mipmap.h"
  43. #include "st_cb_texture.h"
  44.  
  45.  
  46. /**
  47.  * one-time init for generate mipmap
  48.  * XXX Note: there may be other times we need no-op/simple state like this.
  49.  * In that case, some code refactoring would be good.
  50.  */
  51. void
  52. st_init_generate_mipmap(struct st_context *st)
  53. {
  54.    st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
  55. }
  56.  
  57.  
  58. void
  59. st_destroy_generate_mipmap(struct st_context *st)
  60. {
  61.    util_destroy_gen_mipmap(st->gen_mipmap);
  62.    st->gen_mipmap = NULL;
  63. }
  64.  
  65.  
  66. /**
  67.  * Generate mipmap levels using hardware rendering.
  68.  * \return TRUE if successful, FALSE if not possible
  69.  */
  70. static boolean
  71. st_render_mipmap(struct st_context *st,
  72.                  GLenum target,
  73.                  struct st_texture_object *stObj,
  74.                  uint baseLevel, uint lastLevel)
  75. {
  76.    struct pipe_context *pipe = st->pipe;
  77.    struct pipe_screen *screen = pipe->screen;
  78.    struct pipe_sampler_view *psv;
  79.    const uint face = _mesa_tex_target_to_face(target);
  80.  
  81. #if 0
  82.    assert(target != GL_TEXTURE_3D); /* implemented but untested */
  83. #endif
  84.  
  85.    /* check if we can render in the texture's format */
  86.    /* XXX should probably kill this and always use util_gen_mipmap
  87.       since this implements a sw fallback as well */
  88.    if (!screen->is_format_supported(screen, stObj->pt->format,
  89.                                     stObj->pt->target,
  90.                                     0, PIPE_BIND_RENDER_TARGET)) {
  91.       return FALSE;
  92.    }
  93.  
  94.    psv = st_create_texture_sampler_view(pipe, stObj->pt);
  95.  
  96.    util_gen_mipmap(st->gen_mipmap, psv, face, baseLevel, lastLevel,
  97.                    PIPE_TEX_FILTER_LINEAR);
  98.  
  99.    pipe_sampler_view_reference(&psv, NULL);
  100.  
  101.    return TRUE;
  102. }
  103.  
  104. /**
  105.  * Compute the expected number of mipmap levels in the texture given
  106.  * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
  107.  * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
  108.  * levels should be generated.
  109.  */
  110. static GLuint
  111. compute_num_levels(struct gl_context *ctx,
  112.                    struct gl_texture_object *texObj,
  113.                    GLenum target)
  114. {
  115.    const struct gl_texture_image *baseImage;
  116.    GLuint numLevels;
  117.  
  118.    baseImage = _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
  119.  
  120.    numLevels = texObj->BaseLevel + baseImage->MaxNumLevels;
  121.    numLevels = MIN2(numLevels, (GLuint) texObj->MaxLevel + 1);
  122.    assert(numLevels >= 1);
  123.  
  124.    return numLevels;
  125. }
  126.  
  127.  
  128. /**
  129.  * Called via ctx->Driver.GenerateMipmap().
  130.  */
  131. void
  132. st_generate_mipmap(struct gl_context *ctx, GLenum target,
  133.                    struct gl_texture_object *texObj)
  134. {
  135.    struct st_context *st = st_context(ctx);
  136.    struct st_texture_object *stObj = st_texture_object(texObj);
  137.    struct pipe_resource *pt = st_get_texobj_resource(texObj);
  138.    const uint baseLevel = texObj->BaseLevel;
  139.    uint lastLevel;
  140.    uint dstLevel;
  141.  
  142.    if (!pt)
  143.       return;
  144.  
  145.    /* not sure if this ultimately actually should work,
  146.       but we're not supporting multisampled textures yet. */
  147.    assert(pt->nr_samples < 2);
  148.  
  149.    /* find expected last mipmap level to generate*/
  150.    lastLevel = compute_num_levels(ctx, texObj, target) - 1;
  151.  
  152.    if (lastLevel == 0)
  153.       return;
  154.  
  155.    /* The texture isn't in a "complete" state yet so set the expected
  156.     * lastLevel here, since it won't get done in st_finalize_texture().
  157.     */
  158.    stObj->lastLevel = lastLevel;
  159.  
  160.    if (pt->last_level < lastLevel) {
  161.       /* The current gallium texture doesn't have space for all the
  162.        * mipmap levels we need to generate.  So allocate a new texture.
  163.        */
  164.       struct pipe_resource *oldTex = stObj->pt;
  165.  
  166.       /* create new texture with space for more levels */
  167.       stObj->pt = st_texture_create(st,
  168.                                     oldTex->target,
  169.                                     oldTex->format,
  170.                                     lastLevel,
  171.                                     oldTex->width0,
  172.                                     oldTex->height0,
  173.                                     oldTex->depth0,
  174.                                     oldTex->array_size,
  175.                                     0,
  176.                                     oldTex->bind);
  177.  
  178.       /* This will copy the old texture's base image into the new texture
  179.        * which we just allocated.
  180.        */
  181.       st_finalize_texture(ctx, st->pipe, texObj);
  182.  
  183.       /* release the old tex (will likely be freed too) */
  184.       pipe_resource_reference(&oldTex, NULL);
  185.       pipe_sampler_view_reference(&stObj->sampler_view, NULL);
  186.    }
  187.    else {
  188.       /* Make sure that the base texture image data is present in the
  189.        * texture buffer.
  190.        */
  191.       st_finalize_texture(ctx, st->pipe, texObj);
  192.    }
  193.  
  194.    pt = stObj->pt;
  195.  
  196.    assert(pt->last_level >= lastLevel);
  197.  
  198.    /* Try to generate the mipmap by rendering/texturing.  If that fails,
  199.     * use the software fallback.
  200.     */
  201.    if (!st_render_mipmap(st, target, stObj, baseLevel, lastLevel)) {
  202.       /* since the util code actually also has a fallback, should
  203.          probably make it never fail and kill this */
  204.       _mesa_generate_mipmap(ctx, target, texObj);
  205.    }
  206.  
  207.    /* Fill in the Mesa gl_texture_image fields */
  208.    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
  209.       const uint srcLevel = dstLevel - 1;
  210.       const struct gl_texture_image *srcImage
  211.          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
  212.       struct gl_texture_image *dstImage;
  213.       struct st_texture_image *stImage;
  214.       uint border = srcImage->Border;
  215.       uint dstWidth, dstHeight, dstDepth;
  216.  
  217.       dstWidth = u_minify(pt->width0, dstLevel);
  218.       if (texObj->Target == GL_TEXTURE_1D_ARRAY) {
  219.          dstHeight = pt->array_size;
  220.       }
  221.       else {
  222.          dstHeight = u_minify(pt->height0, dstLevel);
  223.       }
  224.       if (texObj->Target == GL_TEXTURE_2D_ARRAY) {
  225.          dstDepth = pt->array_size;
  226.       }
  227.       else {
  228.          dstDepth = u_minify(pt->depth0, dstLevel);
  229.       }
  230.  
  231.       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
  232.       if (!dstImage) {
  233.          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
  234.          return;
  235.       }
  236.  
  237.       /* Free old image data */
  238.       ctx->Driver.FreeTextureImageBuffer(ctx, dstImage);
  239.  
  240.       /* initialize new image */
  241.       _mesa_init_teximage_fields(ctx, dstImage, dstWidth, dstHeight,
  242.                                  dstDepth, border, srcImage->InternalFormat,
  243.                                  srcImage->TexFormat);
  244.  
  245.       stImage = st_texture_image(dstImage);
  246.  
  247.       pipe_resource_reference(&stImage->pt, pt);
  248.    }
  249. }
  250.