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