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 "shader/prog_instruction.h"
  35
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_defines.h"
  38 #include "pipe/p_inlines.h"
  39 #include "util/u_gen_mipmap.h"
  40
  41 #include "cso_cache/cso_cache.h"
  42 #include "cso_cache/cso_context.h"
  43
  44 #include "st_context.h"
  45 #include "st_draw.h"
  46 #include "st_gen_mipmap.h"
  47 #include "st_program.h"
  48 #include "st_texture.h"
  49 #include "st_cb_texture.h"
  50
  51
  52 /**
  53  * one-time init for generate mipmap
  54  * XXX Note: there may be other times we need no-op/simple state like this.
  55  * In that case, some code refactoring would be good.
  56  */
  57 void
  58 st_init_generate_mipmap(struct st_context *st)
  59 {
  60    st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
  61 }
  62
  63
  64 void
  65 st_destroy_generate_mipmap(struct st_context *st)
  66 {
  67    util_destroy_gen_mipmap(st->gen_mipmap);
  68    st->gen_mipmap = NULL;
  69 }
  70
  71
  72 /**
  73  * Generate mipmap levels using hardware rendering.
  74  * \return TRUE if successful, FALSE if not possible
  75  */
  76 static boolean
  77 st_render_mipmap(struct st_context *st,
  78                  GLenum target,
  79                  struct pipe_texture *pt,
  80                  uint baseLevel, uint lastLevel)
  81 {
  82    struct pipe_context *pipe = st->pipe;
  83    struct pipe_screen *screen = pipe->screen;
  84    const uint face = _mesa_tex_target_to_face(target);
  85
  86    assert(target != GL_TEXTURE_3D); /* not done yet */
  87
  88    /* check if we can render in the texture's format */
  89    if (!screen->is_format_supported(screen, pt->format, target,
  90                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
  91       return FALSE;
  92    }
  93
  94    util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
  95                    PIPE_TEX_FILTER_LINEAR);
  96
  97    return TRUE;
  98 }
  99
 100
 101 static void
 102 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 103                          struct gl_texture_object *texObj)
 104 {
 105    struct pipe_context *pipe = ctx->st->pipe;
 106    struct pipe_screen *screen = pipe->screen;
 107    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 108    const uint baseLevel = texObj->BaseLevel;
 109    const uint lastLevel = pt->last_level;
 110    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 111    uint dstLevel;
 112    GLenum datatype;
 113    GLuint comps;
 114
 115    assert(target != GL_TEXTURE_3D); /* not done yet */
 116
 117    _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 118                                   &datatype, &comps);
 119
 120    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 121       const uint srcLevel = dstLevel - 1;
 122       struct pipe_surface *srcSurf, *dstSurf;
 123       const ubyte *srcData;
 124       ubyte *dstData;
 125
 126       srcSurf = screen->get_tex_surface(screen, pt, face, srcLevel, zslice,
 127                                         PIPE_BUFFER_USAGE_CPU_READ);
 128       dstSurf = screen->get_tex_surface(screen, pt, face, dstLevel, zslice,
 129                                         PIPE_BUFFER_USAGE_CPU_WRITE);
 130
 131       srcData = (ubyte *) pipe_surface_map(srcSurf,
 132                                            PIPE_BUFFER_USAGE_CPU_READ)
 133               + srcSurf->offset;
 134       dstData = (ubyte *) pipe_surface_map(dstSurf,
 135                                            PIPE_BUFFER_USAGE_CPU_WRITE)
 136               + dstSurf->offset;
 137
 138       _mesa_generate_mipmap_level(target, datatype, comps,
 139                    0 /*border*/,
 140                    pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
 141                    srcData,
 142                    srcSurf->stride, /* stride in bytes */
 143                    pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
 144                    dstData,
 145                    dstSurf->stride); /* stride in bytes */
 146
 147       pipe_surface_unmap(srcSurf);
 148       pipe_surface_unmap(dstSurf);
 149
 150       pipe_surface_reference(&srcSurf, NULL);
 151       pipe_surface_reference(&dstSurf, NULL);
 152    }
 153 }
 154
 155
 156 void
 157 st_generate_mipmap(GLcontext *ctx, GLenum target,
 158                    struct gl_texture_object *texObj)
 159 {
 160    struct st_context *st = ctx->st;
 161    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 162    const uint baseLevel = texObj->BaseLevel;
 163    uint lastLevel;
 164    uint dstLevel;
 165
 166    if (!pt)
 167       return;
 168
 169    lastLevel = pt->last_level;
 170
 171    if (!st_render_mipmap(st, target, pt, baseLevel, lastLevel)) {
 172       fallback_generate_mipmap(ctx, target, texObj);
 173    }
 174
 175    /* Fill in the Mesa gl_texture_image fields */
 176    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 177       const uint srcLevel = dstLevel - 1;
 178       const struct gl_texture_image *srcImage
 179          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 180       struct gl_texture_image *dstImage;
 181       struct st_texture_image *stImage;
 182       uint dstWidth = pt->width[dstLevel];
 183       uint dstHeight = pt->height[dstLevel];
 184       uint dstDepth = pt->depth[dstLevel];
 185       uint border = srcImage->Border;
 186
 187       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 188       if (!dstImage) {
 189          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 190          return;
 191       }
 192
 193       if (dstImage->ImageOffsets)
 194          _mesa_free(dstImage->ImageOffsets);
 195
 196       /* Free old image data */
 197       if (dstImage->Data)
 198          ctx->Driver.FreeTexImageData(ctx, dstImage);
 199
 200       /* initialize new image */
 201       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 202                                  dstDepth, border, srcImage->InternalFormat);
 203
 204       dstImage->TexFormat = srcImage->TexFormat;
 205
 206       stImage = (struct st_texture_image *) dstImage;
 207       pipe_texture_reference(&stImage->pt, pt);
 208    }
 209 }