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

   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
  34 #include "drivers/common/meta.h"
  35
  36 #include "intel_screen.h"
  37 #include "intel_context.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
  44 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  45
  46
  47 bool
  48 intel_copy_texsubimage(struct intel_context *intel,
  49                        struct intel_texture_image *intelImage,
  50                        GLint dstx, GLint dsty,
  51                        struct intel_renderbuffer *irb,
  52                        GLint x, GLint y, GLsizei width, GLsizei height)
  53 {
  54    struct gl_context *ctx = &intel->ctx;
  55    struct intel_region *region;
  56    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
  57    bool copy_supported = false;
  58    bool copy_supported_with_alpha_override = false;
  59
  60    intel_prepare_render(intel);
  61
  62    if (!intelImage->mt || !irb || !irb->mt) {
  63       if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))
  64          fprintf(stderr, "%s fail %p %p (0x%08x)\n",
  65                  __FUNCTION__, intelImage->mt, irb, internalFormat);
  66       return false;
  67    } else {
  68       region = irb->mt->region;
  69       assert(region);
  70    }
  71
  72    copy_supported = intelImage->base.Base.TexFormat == intel_rb_format(irb);
  73
  74    /* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */
  75    if (intel_rb_format(irb) == MESA_FORMAT_ARGB8888 &&
  76        intelImage->base.Base.TexFormat == MESA_FORMAT_XRGB8888) {
  77       copy_supported = true;
  78    }
  79
  80    /* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */
  81    if (intel_rb_format(irb) == MESA_FORMAT_XRGB8888 &&
  82        intelImage->base.Base.TexFormat == MESA_FORMAT_ARGB8888) {
  83       copy_supported_with_alpha_override = true;
  84    }
  85
  86    if (!copy_supported && !copy_supported_with_alpha_override) {
  87       if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))
  88          fprintf(stderr, "%s mismatched formats %s, %s\n",
  89                  __FUNCTION__,
  90                  _mesa_get_format_name(intelImage->base.Base.TexFormat),
  91                  _mesa_get_format_name(intel_rb_format(irb)));
  92       return false;
  93    }
  94
  95    {
  96       GLuint image_x, image_y;
  97       GLshort src_pitch;
  98
  99       /* get dest x/y in destination texture */
 100       intel_miptree_get_image_offset(intelImage->mt,
 101                                      intelImage->base.Base.Level,
 102                                      intelImage->base.Base.Face,
 103                                      0,
 104                                      &image_x, &image_y);
 105
 106       /* The blitter can't handle Y-tiled buffers. */
 107       if (intelImage->mt->region->tiling == I915_TILING_Y) {
 108          return false;
 109       }
 110
 111       if (ctx->ReadBuffer->Name == 0) {
 112          /* Flip vertical orientation for system framebuffers */
 113          y = ctx->ReadBuffer->Height - (y + height);
 114          src_pitch = -region->pitch;
 115       } else {
 116          /* reading from a FBO, y is already oriented the way we like */
 117          src_pitch = region->pitch;
 118       }
 119
 120       /* blit from src buffer to texture */
 121       if (!intelEmitCopyBlit(intel,
 122                              intelImage->mt->cpp,
 123                              src_pitch,
 124                              region->bo,
 125                              0,
 126                              region->tiling,
 127                              intelImage->mt->region->pitch,
 128                              intelImage->mt->region->bo,
 129                              0,
 130                              intelImage->mt->region->tiling,
 131                              irb->draw_x + x, irb->draw_y + y,
 132                              image_x + dstx, image_y + dsty,
 133                              width, height,
 134                              GL_COPY)) {
 135          return false;
 136       }
 137    }
 138
 139    if (copy_supported_with_alpha_override)
 140       intel_set_teximage_alpha_to_one(ctx, intelImage);
 141
 142    return true;
 143 }
 144
 145
 146 static void
 147 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
 148                      struct gl_texture_image *texImage,
 149                      GLint xoffset, GLint yoffset, GLint zoffset,
 150                      struct gl_renderbuffer *rb,
 151                      GLint x, GLint y,
 152                      GLsizei width, GLsizei height)
 153 {
 154    if (dims == 3 || !intel_copy_texsubimage(intel_context(ctx),
 155                                intel_texture_image(texImage),
 156                                xoffset, yoffset,
 157                                intel_renderbuffer(rb), x, y, width, height)) {
 158       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
 159       _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
 160                                  xoffset, yoffset, zoffset,
 161                                  rb, x, y, width, height);
 162    }
 163 }
 164
 165
 166 void
 167 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 168 {
 169    functions->CopyTexSubImage = intelCopyTexSubImage;
 170 }