src/mesa/drivers/dri/i965/intel_copy_image.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2014 Intel Corporation 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 "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Jason Ekstrand <jason.ekstrand@intel.com>
  26  */
  27
  28 #include "brw_blorp.h"
  29 #include "intel_fbo.h"
  30 #include "intel_tex.h"
  31 #include "intel_blit.h"
  32 #include "intel_mipmap_tree.h"
  33 #include "main/formats.h"
  34 #include "main/teximage.h"
  35 #include "drivers/common/meta.h"
  36
  37 static void
  38 copy_miptrees(struct brw_context *brw,
  39               struct intel_mipmap_tree *src_mt,
  40               int src_x, int src_y, int src_z, unsigned src_level,
  41               struct intel_mipmap_tree *dst_mt,
  42               int dst_x, int dst_y, int dst_z, unsigned dst_level,
  43               int src_width, int src_height)
  44 {
  45    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  46
  47    if (devinfo->gen <= 5) {
  48       /* On gen4-5, try BLT first.
  49        *
  50        * Gen4-5 have a single ring for both 3D and BLT operations, so there's
  51        * no inter-ring synchronization issues like on Gen6+.  It is apparently
  52        * faster than using the 3D pipeline.  Original Gen4 also has to rebase
  53        * and copy miptree slices in order to render to unaligned locations.
  54        */
  55       if (intel_miptree_copy(brw, src_mt, src_level, src_z, src_x, src_y,
  56                              dst_mt, dst_level, dst_z, dst_x, dst_y,
  57                              src_width, src_height))
  58          return;
  59    }
  60
  61    brw_blorp_copy_miptrees(brw,
  62                            src_mt, src_level, src_z,
  63                            dst_mt, dst_level, dst_z,
  64                            src_x, src_y, dst_x, dst_y,
  65                            src_width, src_height);
  66 }
  67
  68 static void
  69 intel_copy_image_sub_data(struct gl_context *ctx,
  70                           struct gl_texture_image *src_image,
  71                           struct gl_renderbuffer *src_renderbuffer,
  72                           int src_x, int src_y, int src_z,
  73                           struct gl_texture_image *dst_image,
  74                           struct gl_renderbuffer *dst_renderbuffer,
  75                           int dst_x, int dst_y, int dst_z,
  76                           int src_width, int src_height)
  77 {
  78    struct brw_context *brw = brw_context(ctx);
  79    struct intel_mipmap_tree *src_mt, *dst_mt;
  80    unsigned src_level, dst_level;
  81
  82    if (src_image) {
  83       src_mt = intel_texture_image(src_image)->mt;
  84       src_level = src_image->Level + src_image->TexObject->MinLevel;
  85
  86       /* Cube maps actually have different images per face */
  87       if (src_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
  88          src_z = src_image->Face;
  89
  90       src_z += src_image->TexObject->MinLayer;
  91    } else {
  92       assert(src_renderbuffer);
  93       src_mt = intel_renderbuffer(src_renderbuffer)->mt;
  94       src_image = src_renderbuffer->TexImage;
  95       src_level = 0;
  96    }
  97
  98    if (dst_image) {
  99       dst_mt = intel_texture_image(dst_image)->mt;
 100
 101       dst_level = dst_image->Level + dst_image->TexObject->MinLevel;
 102
 103       /* Cube maps actually have different images per face */
 104       if (dst_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 105          dst_z = dst_image->Face;
 106
 107       dst_z += dst_image->TexObject->MinLayer;
 108    } else {
 109       assert(dst_renderbuffer);
 110       dst_mt = intel_renderbuffer(dst_renderbuffer)->mt;
 111       dst_image = dst_renderbuffer->TexImage;
 112       dst_level = 0;
 113    }
 114
 115    copy_miptrees(brw, src_mt, src_x, src_y, src_z, src_level,
 116                  dst_mt, dst_x, dst_y, dst_z, dst_level,
 117                  src_width, src_height);
 118
 119    /* CopyImage only works for equal formats, texture view equivalence
 120     * classes, and a couple special cases for compressed textures.
 121     *
 122     * Notably, GL_DEPTH_STENCIL does not appear in any equivalence
 123     * classes, so we know the formats must be the same, and thus both
 124     * will either have stencil, or not.  They can't be mismatched.
 125     */
 126    assert((src_mt->stencil_mt != NULL) == (dst_mt->stencil_mt != NULL));
 127
 128    if (dst_mt->stencil_mt) {
 129       copy_miptrees(brw, src_mt->stencil_mt, src_x, src_y, src_z, src_level,
 130                     dst_mt->stencil_mt, dst_x, dst_y, dst_z, dst_level,
 131                     src_width, src_height);
 132    }
 133 }
 134
 135 void
 136 intelInitCopyImageFuncs(struct dd_function_table *functions)
 137 {
 138    functions->CopyImageSubData = intel_copy_image_sub_data;
 139 }