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