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 #include "st_inlines.h"
  51
  52
  53 /**
  54  * one-time init for generate mipmap
  55  * XXX Note: there may be other times we need no-op/simple state like this.
  56  * In that case, some code refactoring would be good.
  57  */
  58 void
  59 st_init_generate_mipmap(struct st_context *st)
  60 {
  61    st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
  62 }
  63
  64
  65 void
  66 st_destroy_generate_mipmap(struct st_context *st)
  67 {
  68    util_destroy_gen_mipmap(st->gen_mipmap);
  69    st->gen_mipmap = NULL;
  70 }
  71
  72
  73 /**
  74  * Generate mipmap levels using hardware rendering.
  75  * \return TRUE if successful, FALSE if not possible
  76  */
  77 static boolean
  78 st_render_mipmap(struct st_context *st,
  79                  GLenum target,
  80                  struct pipe_texture *pt,
  81                  uint baseLevel, uint lastLevel)
  82 {
  83    struct pipe_context *pipe = st->pipe;
  84    struct pipe_screen *screen = pipe->screen;
  85    const uint face = _mesa_tex_target_to_face(target);
  86
  87    assert(target != GL_TEXTURE_3D); /* not done yet */
  88
  89    /* check if we can render in the texture's format */
  90    if (!screen->is_format_supported(screen, pt->format, pt->target,
  91                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
  92       return FALSE;
  93    }
  94
  95    util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
  96                    PIPE_TEX_FILTER_LINEAR);
  97
  98    return TRUE;
  99 }
 100
 101
 102 static void
 103 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 104                          struct gl_texture_object *texObj)
 105 {
 106    struct pipe_context *pipe = ctx->st->pipe;
 107    struct pipe_screen *screen = pipe->screen;
 108    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 109    const uint baseLevel = texObj->BaseLevel;
 110    const uint lastLevel = pt->last_level;
 111    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 112    uint dstLevel;
 113    GLenum datatype;
 114    GLuint comps;
 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       struct pipe_transfer *srcTrans, *dstTrans;
 124       const ubyte *srcData;
 125       ubyte *dstData;
 126       int srcStride, dstStride;
 127
 128       srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 129                                                 srcLevel, zslice,
 130                                                 PIPE_TRANSFER_READ, 0, 0,
 131                                                 pt->width[srcLevel],
 132                                                 pt->height[srcLevel]);
 133
 134       dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
 135                                                 dstLevel, zslice,
 136                                                 PIPE_TRANSFER_WRITE, 0, 0,
 137                                                 pt->width[dstLevel],
 138                                                 pt->height[dstLevel]);
 139
 140       srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
 141       dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
 142
 143       srcStride = srcTrans->stride / srcTrans->block.size;
 144       dstStride = dstTrans->stride / dstTrans->block.size;
 145
 146       _mesa_generate_mipmap_level(target, datatype, comps,
 147                    0 /*border*/,
 148                    pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
 149                    srcData,
 150                    srcStride, /* stride in texels */
 151                    pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
 152                    dstData,
 153                    dstStride); /* stride in texels */
 154
 155       screen->transfer_unmap(screen, srcTrans);
 156       screen->transfer_unmap(screen, dstTrans);
 157
 158       screen->tex_transfer_destroy(srcTrans);
 159       screen->tex_transfer_destroy(dstTrans);
 160    }
 161 }
 162
 163
 164 void
 165 st_generate_mipmap(GLcontext *ctx, GLenum target,
 166                    struct gl_texture_object *texObj)
 167 {
 168    struct st_context *st = ctx->st;
 169    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 170    const uint baseLevel = texObj->BaseLevel;
 171    uint lastLevel;
 172    uint dstLevel;
 173
 174    if (!pt)
 175       return;
 176
 177    lastLevel = pt->last_level;
 178
 179    if (!st_render_mipmap(st, target, pt, baseLevel, lastLevel)) {
 180       fallback_generate_mipmap(ctx, target, texObj);
 181    }
 182
 183    /* Fill in the Mesa gl_texture_image fields */
 184    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 185       const uint srcLevel = dstLevel - 1;
 186       const struct gl_texture_image *srcImage
 187          = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
 188       struct gl_texture_image *dstImage;
 189       struct st_texture_image *stImage;
 190       uint dstWidth = pt->width[dstLevel];
 191       uint dstHeight = pt->height[dstLevel];
 192       uint dstDepth = pt->depth[dstLevel];
 193       uint border = srcImage->Border;
 194
 195       dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
 196       if (!dstImage) {
 197          _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
 198          return;
 199       }
 200
 201       if (dstImage->ImageOffsets)
 202          _mesa_free(dstImage->ImageOffsets);
 203
 204       /* Free old image data */
 205       if (dstImage->Data)
 206          ctx->Driver.FreeTexImageData(ctx, dstImage);
 207
 208       /* initialize new image */
 209       _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
 210                                  dstDepth, border, srcImage->InternalFormat);
 211
 212       dstImage->TexFormat = srcImage->TexFormat;
 213
 214       stImage = (struct st_texture_image *) dstImage;
 215       pipe_texture_reference(&stImage->pt, pt);
 216    }
 217 }