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 "pipe/p_winsys.h"
  40 #include "util/u_gen_mipmap.h"
  41
  42 #include "cso_cache/cso_cache.h"
  43 #include "cso_cache/cso_context.h"
  44
  45 #include "st_context.h"
  46 #include "st_draw.h"
  47 #include "st_gen_mipmap.h"
  48 #include "st_program.h"
  49 #include "st_texture.h"
  50 #include "st_cb_drawpixels.h"
  51 #include "st_cb_texture.h"
  52
  53
  54 /**
  55  * one-time init for generate mipmap
  56  * XXX Note: there may be other times we need no-op/simple state like this.
  57  * In that case, some code refactoring would be good.
  58  */
  59 void
  60 st_init_generate_mipmap(struct st_context *st)
  61 {
  62    st->gen_mipmap = util_create_gen_mipmap(st->pipe);
  63 }
  64
  65
  66 void
  67 st_destroy_generate_mipmpap(struct st_context *st)
  68 {
  69    util_destroy_gen_mipmap(st->gen_mipmap);
  70    st->gen_mipmap = NULL;
  71 }
  72
  73
  74 /**
  75  * Generate mipmap levels using hardware rendering.
  76  * \return TRUE if successful, FALSE if not possible
  77  */
  78 static boolean
  79 st_render_mipmap(struct st_context *st,
  80                  GLenum target,
  81                  struct pipe_texture *pt,
  82                  uint baseLevel, uint lastLevel)
  83 {
  84    struct pipe_context *pipe = st->pipe;
  85    struct pipe_screen *screen = pipe->screen;
  86    const uint face = _mesa_tex_target_to_face(target);
  87
  88    assert(target != GL_TEXTURE_3D); /* not done yet */
  89
  90    /* check if we can render in the texture's format */
  91    if (!screen->is_format_supported(screen, pt->format, PIPE_SURFACE)) {
  92       return FALSE;
  93    }
  94
  95    util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel);
  96
  97    /* restore pipe state */
  98 #if 0
  99    cso_set_rasterizer(st->cso_context, &st->state.rasterizer);
 100    cso_set_samplers(st->cso_context, st->state.samplers_list);
 101    pipe->bind_fs_state(pipe, st->fp->shader_program);
 102    pipe->bind_vs_state(pipe, st->vp->shader_program);
 103    pipe->set_sampler_textures(pipe, st->state.num_textures,
 104                               st->state.sampler_texture);
 105    pipe->set_viewport_state(pipe, &st->state.viewport);
 106 #else
 107    /* XXX is this sufficient? */
 108    st_invalidate_state(st->ctx, _NEW_COLOR | _NEW_TEXTURE);
 109 #endif
 110
 111    return TRUE;
 112 }
 113
 114
 115 static void
 116 fallback_generate_mipmap(GLcontext *ctx, GLenum target,
 117                          struct gl_texture_object *texObj)
 118 {
 119    struct pipe_context *pipe = ctx->st->pipe;
 120    struct pipe_screen *screen = pipe->screen;
 121    struct pipe_winsys *ws = pipe->winsys;
 122    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 123    const uint baseLevel = texObj->BaseLevel;
 124    const uint lastLevel = pt->last_level;
 125    const uint face = _mesa_tex_target_to_face(target), zslice = 0;
 126    uint dstLevel;
 127    GLenum datatype;
 128    GLuint comps;
 129
 130    assert(target != GL_TEXTURE_3D); /* not done yet */
 131
 132    _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
 133                                   &datatype, &comps);
 134
 135    for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
 136       const uint srcLevel = dstLevel - 1;
 137       struct pipe_surface *srcSurf, *dstSurf;
 138       const ubyte *srcData;
 139       ubyte *dstData;
 140
 141       srcSurf = screen->get_tex_surface(screen, pt, face, srcLevel, zslice);
 142       dstSurf = screen->get_tex_surface(screen, pt, face, dstLevel, zslice);
 143
 144       srcData = (ubyte *) ws->buffer_map(ws, srcSurf->buffer,
 145                                          PIPE_BUFFER_USAGE_CPU_READ)
 146               + srcSurf->offset;
 147       dstData = (ubyte *) ws->buffer_map(ws, dstSurf->buffer,
 148                                          PIPE_BUFFER_USAGE_CPU_WRITE)
 149               + dstSurf->offset;
 150
 151       _mesa_generate_mipmap_level(target, datatype, comps,
 152                    0 /*border*/,
 153                    pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
 154                    srcSurf->pitch * srcSurf->cpp, /* stride in bytes */
 155                    srcData,
 156                    pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
 157                    dstSurf->pitch * dstSurf->cpp, /* stride in bytes */
 158                    dstData);
 159
 160       ws->buffer_unmap(ws, srcSurf->buffer);
 161       ws->buffer_unmap(ws, dstSurf->buffer);
 162
 163       pipe_surface_reference(&srcSurf, NULL);
 164       pipe_surface_reference(&dstSurf, NULL);
 165    }
 166 }
 167
 168
 169 void
 170 st_generate_mipmap(GLcontext *ctx, GLenum target,
 171                    struct gl_texture_object *texObj)
 172 {
 173    struct st_context *st = ctx->st;
 174    struct pipe_texture *pt = st_get_texobj_texture(texObj);
 175    const uint baseLevel = texObj->BaseLevel;
 176    const uint lastLevel = pt->last_level;
 177    uint dstLevel;
 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       stImage->pt = pt;
 216    }
 217 }