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 #include "main/fbobject.h"
  34
  35 #include "drivers/common/meta.h"
  36
  37 #include "intel_screen.h"
  38 #include "intel_context.h"
  39 #include "intel_mipmap_tree.h"
  40 #include "intel_regions.h"
  41 #include "intel_fbo.h"
  42 #include "intel_tex.h"
  43 #include "intel_blit.h"
  44 #ifndef I915
  45 #include "brw_context.h"
  46 #endif
  47
  48 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  49
  50
  51 bool
  52 intel_copy_texsubimage(struct intel_context *intel,
  53                        struct intel_texture_image *intelImage,
  54                        GLint dstx, GLint dsty,
  55                        struct intel_renderbuffer *irb,
  56                        GLint x, GLint y, GLsizei width, GLsizei height)
  57 {
  58    struct gl_context *ctx = &intel->ctx;
  59    struct intel_region *region;
  60    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
  61    bool copy_supported = false;
  62    bool copy_supported_with_alpha_override = false;
  63
  64    intel_prepare_render(intel);
  65
  66    if (!intelImage->mt || !irb || !irb->mt) {
  67       if (unlikely(INTEL_DEBUG & DEBUG_PERF))
  68          fprintf(stderr, "%s fail %p %p (0x%08x)\n",
  69                  __FUNCTION__, intelImage->mt, irb, internalFormat);
  70       return false;
  71    } else {
  72       region = irb->mt->region;
  73       assert(region);
  74    }
  75
  76    /* According to the Ivy Bridge PRM, Vol1 Part4, section 1.2.1.2 (Graphics
  77     * Data Size Limitations):
  78     *
  79     *    The BLT engine is capable of transferring very large quantities of
  80     *    graphics data. Any graphics data read from and written to the
  81     *    destination is permitted to represent a number of pixels that
  82     *    occupies up to 65,536 scan lines and up to 32,768 bytes per scan line
  83     *    at the destination. The maximum number of pixels that may be
  84     *    represented per scan line’s worth of graphics data depends on the
  85     *    color depth.
  86     *
  87     * Furthermore, intelEmitCopyBlit (which is called below) uses a signed
  88     * 16-bit integer to represent buffer pitch, so it can only handle buffer
  89     * pitches < 32k.
  90     *
  91     * As a result of these two limitations, we can only use the blitter to do
  92     * this copy when the region's pitch is less than 32k.
  93     */
  94    if (region->pitch >= 32768)
  95       return false;
  96
  97    if (intelImage->base.Base.TexObject->Target == GL_TEXTURE_1D_ARRAY ||
  98        intelImage->base.Base.TexObject->Target == GL_TEXTURE_2D_ARRAY) {
  99       perf_debug("no support for array textures\n");
 100    }
 101
 102    copy_supported = intelImage->base.Base.TexFormat == intel_rb_format(irb);
 103
 104    /* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */
 105    if (intel_rb_format(irb) == MESA_FORMAT_ARGB8888 &&
 106        intelImage->base.Base.TexFormat == MESA_FORMAT_XRGB8888) {
 107       copy_supported = true;
 108    }
 109
 110    /* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */
 111    if (intel_rb_format(irb) == MESA_FORMAT_XRGB8888 &&
 112        intelImage->base.Base.TexFormat == MESA_FORMAT_ARGB8888) {
 113       copy_supported_with_alpha_override = true;
 114    }
 115
 116    if (!copy_supported && !copy_supported_with_alpha_override) {
 117       perf_debug("%s mismatched formats %s, %s\n",
 118                  __FUNCTION__,
 119                  _mesa_get_format_name(intelImage->base.Base.TexFormat),
 120                  _mesa_get_format_name(intel_rb_format(irb)));
 121       return false;
 122    }
 123
 124    {
 125       GLuint image_x, image_y;
 126       GLshort src_pitch;
 127
 128       /* get dest x/y in destination texture */
 129       intel_miptree_get_image_offset(intelImage->mt,
 130                                      intelImage->base.Base.Level,
 131                                      intelImage->base.Base.Face,
 132                                      &image_x, &image_y);
 133
 134       /* The blitter can't handle Y-tiled buffers. */
 135       if (intelImage->mt->region->tiling == I915_TILING_Y) {
 136          return false;
 137       }
 138
 139       if (_mesa_is_winsys_fbo(ctx->ReadBuffer)) {
 140          /* Flip vertical orientation for system framebuffers */
 141          y = ctx->ReadBuffer->Height - (y + height);
 142          src_pitch = -region->pitch;
 143       } else {
 144          /* reading from a FBO, y is already oriented the way we like */
 145          src_pitch = region->pitch;
 146       }
 147
 148       /* blit from src buffer to texture */
 149       if (!intelEmitCopyBlit(intel,
 150                              intelImage->mt->cpp,
 151                              src_pitch,
 152                              region->bo,
 153                              0,
 154                              region->tiling,
 155                              intelImage->mt->region->pitch,
 156                              intelImage->mt->region->bo,
 157                              0,
 158                              intelImage->mt->region->tiling,
 159                              irb->draw_x + x, irb->draw_y + y,
 160                              image_x + dstx, image_y + dsty,
 161                              width, height,
 162                              GL_COPY)) {
 163          return false;
 164       }
 165    }
 166
 167    if (copy_supported_with_alpha_override)
 168       intel_set_teximage_alpha_to_one(ctx, intelImage);
 169
 170    return true;
 171 }
 172
 173
 174 static void
 175 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
 176                      struct gl_texture_image *texImage,
 177                      GLint xoffset, GLint yoffset, GLint zoffset,
 178                      struct gl_renderbuffer *rb,
 179                      GLint x, GLint y,
 180                      GLsizei width, GLsizei height)
 181 {
 182    struct intel_context *intel = intel_context(ctx);
 183    if (dims != 3) {
 184 #ifndef I915
 185       /* Try BLORP first.  It can handle almost everything. */
 186       if (brw_blorp_copytexsubimage(intel, rb, texImage, x, y,
 187                                     xoffset, yoffset, width, height))
 188          return;
 189 #endif
 190
 191       /* Next, try the BLT engine. */
 192       if (intel_copy_texsubimage(intel,
 193                                  intel_texture_image(texImage),
 194                                  xoffset, yoffset,
 195                                  intel_renderbuffer(rb), x, y, width, height))
 196          return;
 197    }
 198
 199    /* Finally, fall back to meta.  This will likely be slow. */
 200    perf_debug("%s - fallback to swrast\n", __FUNCTION__);
 201    _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
 202                               xoffset, yoffset, zoffset,
 203                               rb, x, y, width, height);
 204 }
 205
 206
 207 void
 208 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
 209 {
 210    functions->CopyTexSubImage = intelCopyTexSubImage;
 211 }