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

   1 /*
   2  * Copyright 2003 VMware, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "main/mtypes.h"
  27 #include "main/enums.h"
  28 #include "main/image.h"
  29 #include "main/teximage.h"
  30 #include "main/texobj.h"
  31 #include "main/texstate.h"
  32 #include "main/fbobject.h"
  33
  34 #include "drivers/common/meta.h"
  35
  36 #include "intel_screen.h"
  37 #include "intel_mipmap_tree.h"
  38 #include "intel_fbo.h"
  39 #include "intel_tex.h"
  40 #include "intel_blit.h"
  41 #include "brw_context.h"
  42
  43 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  44
  45
  46 static bool
  47 intel_copy_texsubimage(struct brw_context *brw,
  48                        struct intel_texture_image *intelImage,
  49                        GLint dstx, GLint dsty, GLint slice,
  50                        struct intel_renderbuffer *irb,
  51                        GLint x, GLint y, GLsizei width, GLsizei height)
  52 {
  53    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
  54
  55    if (!intelImage->mt || !irb || !irb->mt) {
  56       if (unlikely(INTEL_DEBUG & DEBUG_PERF))
  57          fprintf(stderr, "%s fail %p %p (0x%08x)\n",
  58                  __func__, intelImage->mt, irb, internalFormat);
  59       return false;
  60    }
  61
  62    /* No pixel transfer operations (zoom, bias, mapping), just a blit */
  63    if (brw->ctx._ImageTransferState)
  64       return false;
  65
  66    intel_prepare_render(brw);
  67
  68    /* glCopyTexSubImage() can be called on a multisampled renderbuffer (if
  69     * that renderbuffer is associated with the window system framebuffer),
  70     * however the hardware blitter can't handle this case, so fall back to
  71     * meta (which can, since it uses ReadPixels).
  72     */
  73    if (irb->Base.Base.NumSamples != 0)
  74       return false;
  75
  76    /* glCopyTexSubImage() can't be called on a multisampled texture. */
  77    assert(intelImage->base.Base.NumSamples == 0);
  78
  79    /* account for view parameters and face index */
  80    int dst_level = intelImage->base.Base.Level +
  81                    intelImage->base.Base.TexObject->MinLevel;
  82    int dst_slice = slice + intelImage->base.Base.Face +
  83                    intelImage->base.Base.TexObject->MinLayer;
  84
  85    /* blit from src buffer to texture */
  86    return intel_miptree_blit(brw,
  87                              irb->mt, irb->mt_level, irb->mt_layer,
  88                              x, y, irb->Base.Base.Name == 0,
  89                              intelImage->mt, dst_level, dst_slice,
  90                              dstx, dsty, false,
  91                              width, height, GL_COPY);
  92 }
  93
  94
  95 static void
  96 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
  97                      struct gl_texture_image *texImage,
  98                      GLint xoffset, GLint yoffset, GLint slice,
  99                      struct gl_renderbuffer *rb,
 100                      GLint x, GLint y,
 101                      GLsizei width, GLsizei height)
 102 {
 103    struct brw_context *brw = brw_context(ctx);
 104
 105    /* Try BLORP first.  It can handle almost everything. */
 106    if (brw_blorp_copytexsubimage(brw, rb, texImage, slice, x, y,
 107                                  xoffset, yoffset, width, height))
 108       return;
 109
 110    /* Next, try the BLT engine. */
 111    if (intel_copy_texsubimage(brw,
 112                               intel_texture_image(texImage),
 113                               xoffset, yoffset, slice,
 114                               intel_renderbuffer(rb), x, y, width, height)) {
 115       return;
 116    }
 117
 118    /* Finally, fall back to meta.  This will likely be slow. */
 119    perf_debug("%s - fallback to swrast\n", __func__);
 120    _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
 121                               xoffset, yoffset, slice,
 122                               rb, x, y, width, height);
 123 }
 124
 125
 126 void
 127 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 128 {
 129    functions->CopyTexSubImage = intelCopyTexSubImage;
 130 }