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/texobj.h"
  33 #include "main/texstate.h"
  34 #include "main/fbobject.h"
  35
  36 #include "drivers/common/meta.h"
  37
  38 #include "intel_screen.h"
  39 #include "intel_mipmap_tree.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    bool ret;
  57
  58    intel_prepare_render(brw);
  59
  60    /* glCopyTexSubImage() can be called on a multisampled renderbuffer (if
  61     * that renderbuffer is associated with the window system framebuffer),
  62     * however the hardware blitter can't handle this case, so fall back to
  63     * meta (which can, since it uses ReadPixels).
  64     */
  65    if (irb->Base.Base.NumSamples != 0)
  66       return false;
  67
  68    /* glCopyTexSubImage() can't be called on a multisampled texture. */
  69    assert(intelImage->base.Base.NumSamples == 0);
  70
  71    if (!intelImage->mt || !irb || !irb->mt) {
  72       if (unlikely(INTEL_DEBUG & DEBUG_PERF))
  73          fprintf(stderr, "%s fail %p %p (0x%08x)\n",
  74                  __func__, intelImage->mt, irb, internalFormat);
  75       return false;
  76    }
  77
  78    /* account for view parameters and face index */
  79    int dst_level = intelImage->base.Base.Level +
  80                    intelImage->base.Base.TexObject->MinLevel;
  81    int dst_slice = slice + intelImage->base.Base.Face +
  82                    intelImage->base.Base.TexObject->MinLayer;
  83
  84    _mesa_unlock_texture(&brw->ctx, intelImage->base.Base.TexObject);
  85
  86    /* blit from src buffer to texture */
  87    ret = intel_miptree_blit(brw,
  88                             irb->mt, irb->mt_level, irb->mt_layer,
  89                             x, y, irb->Base.Base.Name == 0,
  90                             intelImage->mt, dst_level, dst_slice,
  91                             dstx, dsty, false,
  92                             width, height, GL_COPY);
  93
  94    _mesa_lock_texture(&brw->ctx, intelImage->base.Base.TexObject);
  95
  96    return ret;
  97 }
  98
  99
 100 static void
 101 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
 102                      struct gl_texture_image *texImage,
 103                      GLint xoffset, GLint yoffset, GLint slice,
 104                      struct gl_renderbuffer *rb,
 105                      GLint x, GLint y,
 106                      GLsizei width, GLsizei height)
 107 {
 108    struct brw_context *brw = brw_context(ctx);
 109
 110    /* Try BLORP first.  It can handle almost everything. */
 111    if (brw_blorp_copytexsubimage(brw, rb, texImage, slice, x, y,
 112                                  xoffset, yoffset, width, height))
 113       return;
 114
 115    /* Next, try the BLT engine. */
 116    if (intel_copy_texsubimage(brw,
 117                               intel_texture_image(texImage),
 118                               xoffset, yoffset, slice,
 119                               intel_renderbuffer(rb), x, y, width, height)) {
 120       return;
 121    }
 122
 123    /* Finally, fall back to meta.  This will likely be slow. */
 124    perf_debug("%s - fallback to swrast\n", __func__);
 125    _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
 126                               xoffset, yoffset, slice,
 127                               rb, x, y, width, height);
 128 }
 129
 130
 131 void
 132 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 133 {
 134    functions->CopyTexSubImage = intelCopyTexSubImage;
 135 }