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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   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 VMWARE 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 #include "main/mtypes.h"
  29 #include "main/enums.h"
  30 #include "main/image.h"
  31 #include "main/teximage.h"
  32 #include "main/texstate.h"
  33 #include "main/fbobject.h"
  34
  35 #include "drivers/common/meta.h"
  36
  37 #include "intel_screen.h"
  38 #include "intel_mipmap_tree.h"
  39 #include "intel_fbo.h"
  40 #include "intel_tex.h"
  41 #include "intel_blit.h"
  42 #include "brw_context.h"
  43
  44 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  45
  46
  47 static bool
  48 intel_copy_texsubimage(struct brw_context *brw,
  49                        struct intel_texture_image *intelImage,
  50                        GLint dstx, GLint dsty, GLint slice,
  51                        struct intel_renderbuffer *irb,
  52                        GLint x, GLint y, GLsizei width, GLsizei height)
  53 {
  54    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
  55
  56    intel_prepare_render(brw);
  57
  58    /* glCopyTexSubImage() can be called on a multisampled renderbuffer (if
  59     * that renderbuffer is associated with the window system framebuffer),
  60     * however the hardware blitter can't handle this case, so fall back to
  61     * meta (which can, since it uses ReadPixels).
  62     */
  63    if (irb->Base.Base.NumSamples != 0)
  64       return false;
  65
  66    /* glCopyTexSubImage() can't be called on a multisampled texture. */
  67    assert(intelImage->base.Base.NumSamples == 0);
  68
  69    if (!intelImage->mt || !irb || !irb->mt) {
  70       if (unlikely(INTEL_DEBUG & DEBUG_PERF))
  71          fprintf(stderr, "%s fail %p %p (0x%08x)\n",
  72                  __FUNCTION__, intelImage->mt, irb, internalFormat);
  73       return false;
  74    }
  75
  76    /* account for view parameters and face index */
  77    int dst_level = intelImage->base.Base.Level +
  78                    intelImage->base.Base.TexObject->MinLevel;
  79    int dst_slice = slice + intelImage->base.Base.Face +
  80                    intelImage->base.Base.TexObject->MinLayer;
  81
  82    /* blit from src buffer to texture */
  83    if (!intel_miptree_blit(brw,
  84                            irb->mt, irb->mt_level, irb->mt_layer,
  85                            x, y, irb->Base.Base.Name == 0,
  86                            intelImage->mt, dst_level, dst_slice,
  87                            dstx, dsty, false,
  88                            width, height, GL_COPY)) {
  89       return false;
  90    }
  91
  92    return true;
  93 }
  94
  95
  96 static void
  97 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
  98                      struct gl_texture_image *texImage,
  99                      GLint xoffset, GLint yoffset, GLint slice,
 100                      struct gl_renderbuffer *rb,
 101                      GLint x, GLint y,
 102                      GLsizei width, GLsizei height)
 103 {
 104    struct brw_context *brw = brw_context(ctx);
 105
 106    /* Try BLORP first.  It can handle almost everything. */
 107    if (brw_blorp_copytexsubimage(brw, rb, texImage, slice, x, y,
 108                                  xoffset, yoffset, width, height))
 109       return;
 110
 111    /* Next, try the BLT engine. */
 112    if (intel_copy_texsubimage(brw,
 113                               intel_texture_image(texImage),
 114                               xoffset, yoffset, slice,
 115                               intel_renderbuffer(rb), x, y, width, height)) {
 116       return;
 117    }
 118
 119    /* Finally, fall back to meta.  This will likely be slow. */
 120    perf_debug("%s - fallback to swrast\n", __FUNCTION__);
 121    _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
 122                               xoffset, yoffset, slice,
 123                               rb, x, y, width, height);
 124 }
 125
 126
 127 void
 128 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 129 {
 130    functions->CopyTexSubImage = intelCopyTexSubImage;
 131 }