Esempio n. 1
0
/**
 * Return true if memcpy cannot be used for ReadPixels.
 *
 * If uses_blit is true, the function returns true if a simple 3D engine blit
 * cannot be used for ReadPixels packing.
 *
 * NOTE: This doesn't take swizzling and format conversions between
 *       the readbuffer and the pixel pack buffer into account.
 */
GLboolean
_mesa_readpixels_needs_slow_path(const struct gl_context *ctx, GLenum format,
                                 GLenum type, GLboolean uses_blit)
{
   struct gl_renderbuffer *rb =
         _mesa_get_read_renderbuffer_for_format(ctx, format);
   GLenum srcType;

   ASSERT(rb);

   /* There are different rules depending on the base format. */
   switch (format) {
   case GL_DEPTH_STENCIL:
      return !_mesa_has_depthstencil_combined(ctx->ReadBuffer) ||
             ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f ||
             ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
             ctx->Pixel.MapStencilFlag;

   case GL_DEPTH_COMPONENT:
      return ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f;

   case GL_STENCIL_INDEX:
      return ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
             ctx->Pixel.MapStencilFlag;

   default:
      /* Color formats. */
      if (need_rgb_to_luminance_conversion(rb->Format, format)) {
         return GL_TRUE;
      }

      /* Conversion between signed and unsigned integers needs masking
       * (it isn't just memcpy). */
      srcType = _mesa_get_format_datatype(rb->Format);

      if ((srcType == GL_INT &&
           (type == GL_UNSIGNED_INT ||
            type == GL_UNSIGNED_SHORT ||
            type == GL_UNSIGNED_BYTE)) ||
          (srcType == GL_UNSIGNED_INT &&
           (type == GL_INT ||
            type == GL_SHORT ||
            type == GL_BYTE))) {
         return GL_TRUE;
      }

      /* And finally, see if there are any transfer ops. */
      return get_readpixels_transfer_ops(ctx, rb->Format, format, type,
                                         uses_blit) != 0;
   }
   return GL_FALSE;
}
Esempio n. 2
0
/**
 * Return true if memcpy cannot be used for ReadPixels.
 *
 * If uses_blit is true, the function returns true if a simple 3D engine blit
 * cannot be used for ReadPixels packing.
 *
 * NOTE: This doesn't take swizzling and format conversions between
 *       the readbuffer and the pixel pack buffer into account.
 */
GLboolean
_mesa_readpixels_needs_slow_path(const struct gl_context *ctx, GLenum format,
                                 GLenum type, GLboolean uses_blit)
{
   struct gl_renderbuffer *rb =
         _mesa_get_read_renderbuffer_for_format(ctx, format);
   GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format);

   assert(rb);

   /* There are different rules depending on the base format. */
   switch (format) {
   case GL_DEPTH_STENCIL:
      return !_mesa_has_depthstencil_combined(ctx->ReadBuffer) ||
             ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f ||
             ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
             ctx->Pixel.MapStencilFlag;

   case GL_DEPTH_COMPONENT:
      return ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f;

   case GL_STENCIL_INDEX:
      return ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
             ctx->Pixel.MapStencilFlag;

   default:
      /* Color formats. */
      if (_mesa_need_rgb_to_luminance_conversion(rb->_BaseFormat,
                                                 dstBaseFormat)) {
         return GL_TRUE;
      }

      /* And finally, see if there are any transfer ops. */
      return _mesa_get_readpixels_transfer_ops(ctx, rb->Format, format, type,
                                               uses_blit) != 0;
   }
   return GL_FALSE;
}
Esempio n. 3
0
static void
st_BlitFramebuffer(struct gl_context *ctx,
                   struct gl_framebuffer *readFB,
                   struct gl_framebuffer *drawFB,
                   GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
                   GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
                   GLbitfield mask, GLenum filter)
{
   const GLbitfield depthStencil = (GL_DEPTH_BUFFER_BIT |
                                    GL_STENCIL_BUFFER_BIT);
   struct st_context *st = st_context(ctx);
   const uint pFilter = ((filter == GL_NEAREST)
                         ? PIPE_TEX_FILTER_NEAREST
                         : PIPE_TEX_FILTER_LINEAR);
   struct {
      GLint srcX0, srcY0, srcX1, srcY1;
      GLint dstX0, dstY0, dstX1, dstY1;
   } clip;
   struct pipe_blit_info blit;

   st_manager_validate_framebuffers(st);

   /* Make sure bitmap rendering has landed in the framebuffers */
   st_flush_bitmap_cache(st);
   st_invalidate_readpix_cache(st);

   clip.srcX0 = srcX0;
   clip.srcY0 = srcY0;
   clip.srcX1 = srcX1;
   clip.srcY1 = srcY1;
   clip.dstX0 = dstX0;
   clip.dstY0 = dstY0;
   clip.dstX1 = dstX1;
   clip.dstY1 = dstY1;

   /* NOTE: If the src and dst dimensions don't match, we cannot simply adjust
    * the integer coordinates to account for clipping (or scissors) because that
    * would make us cut off fractional parts, affecting the result of the blit.
    *
    * XXX: This should depend on mask !
    */
   if (!_mesa_clip_blit(ctx, readFB, drawFB,
                        &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
                        &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
      return; /* nothing to draw/blit */
   }
   memset(&blit, 0, sizeof(struct pipe_blit_info));
   blit.scissor_enable =
      (dstX0 != clip.dstX0) ||
      (dstY0 != clip.dstY0) ||
      (dstX1 != clip.dstX1) ||
      (dstY1 != clip.dstY1);

   if (st_fb_orientation(drawFB) == Y_0_TOP) {
      /* invert Y for dest */
      dstY0 = drawFB->Height - dstY0;
      dstY1 = drawFB->Height - dstY1;
      /* invert Y for clip */
      clip.dstY0 = drawFB->Height - clip.dstY0;
      clip.dstY1 = drawFB->Height - clip.dstY1;
   }
   if (blit.scissor_enable) {
      blit.scissor.minx = MIN2(clip.dstX0, clip.dstX1);
      blit.scissor.miny = MIN2(clip.dstY0, clip.dstY1);
      blit.scissor.maxx = MAX2(clip.dstX0, clip.dstX1);
      blit.scissor.maxy = MAX2(clip.dstY0, clip.dstY1);
#if 0
      debug_printf("scissor = (%i,%i)-(%i,%i)\n",
                   blit.scissor.minx,blit.scissor.miny,
                   blit.scissor.maxx,blit.scissor.maxy);
#endif
   }

   if (st_fb_orientation(readFB) == Y_0_TOP) {
      /* invert Y for src */
      srcY0 = readFB->Height - srcY0;
      srcY1 = readFB->Height - srcY1;
   }

   if (srcY0 > srcY1 && dstY0 > dstY1) {
      /* Both src and dst are upside down.  Swap Y to make it
       * right-side up to increase odds of using a fast path.
       * Recall that all Gallium raster coords have Y=0=top.
       */
      GLint tmp;
      tmp = srcY0;
      srcY0 = srcY1;
      srcY1 = tmp;
      tmp = dstY0;
      dstY0 = dstY1;
      dstY1 = tmp;
   }

   blit.src.box.depth = 1;
   blit.dst.box.depth = 1;

   /* Destination dimensions have to be positive: */
   if (dstX0 < dstX1) {
      blit.dst.box.x = dstX0;
      blit.src.box.x = srcX0;
      blit.dst.box.width = dstX1 - dstX0;
      blit.src.box.width = srcX1 - srcX0;
   } else {
      blit.dst.box.x = dstX1;
      blit.src.box.x = srcX1;
      blit.dst.box.width = dstX0 - dstX1;
      blit.src.box.width = srcX0 - srcX1;
   }
   if (dstY0 < dstY1) {
      blit.dst.box.y = dstY0;
      blit.src.box.y = srcY0;
      blit.dst.box.height = dstY1 - dstY0;
      blit.src.box.height = srcY1 - srcY0;
   } else {
      blit.dst.box.y = dstY1;
      blit.src.box.y = srcY1;
      blit.dst.box.height = dstY0 - dstY1;
      blit.src.box.height = srcY0 - srcY1;
   }

   if (drawFB != ctx->WinSysDrawBuffer)
      st_window_rectangles_to_blit(ctx, &blit);

   blit.filter = pFilter;
   blit.render_condition_enable = TRUE;
   blit.alpha_blend = FALSE;

   if (mask & GL_COLOR_BUFFER_BIT) {
      struct gl_renderbuffer_attachment *srcAtt =
         &readFB->Attachment[readFB->_ColorReadBufferIndex];

      blit.mask = PIPE_MASK_RGBA;

      if (srcAtt->Type == GL_TEXTURE) {
         struct st_texture_object *srcObj = st_texture_object(srcAtt->Texture);
         GLuint i;

         if (!srcObj || !srcObj->pt) {
            return;
         }

         for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
            struct st_renderbuffer *dstRb =
               st_renderbuffer(drawFB->_ColorDrawBuffers[i]);

            if (dstRb) {
               struct pipe_surface *dstSurf = dstRb->surface;

               if (dstSurf) {
                  blit.dst.resource = dstSurf->texture;
                  blit.dst.level = dstSurf->u.tex.level;
                  blit.dst.box.z = dstSurf->u.tex.first_layer;
                  blit.dst.format = dstSurf->format;

                  blit.src.resource = srcObj->pt;
                  blit.src.level = srcAtt->TextureLevel;
                  blit.src.box.z = srcAtt->Zoffset + srcAtt->CubeMapFace;
                  blit.src.format = srcObj->pt->format;

                  st_adjust_blit_for_srgb(&blit, ctx->Color.sRGBEnabled);

                  st->pipe->blit(st->pipe, &blit);
                  dstRb->defined = true; /* front buffer tracking */
               }
            }
         }
      }
      else {
         struct st_renderbuffer *srcRb =
            st_renderbuffer(readFB->_ColorReadBuffer);
         struct pipe_surface *srcSurf;
         GLuint i;

         if (!srcRb || !srcRb->surface) {
            return;
         }

         srcSurf = srcRb->surface;

         for (i = 0; i < drawFB->_NumColorDrawBuffers; i++) {
            struct st_renderbuffer *dstRb =
               st_renderbuffer(drawFB->_ColorDrawBuffers[i]);

            if (dstRb) {
               struct pipe_surface *dstSurf = dstRb->surface;

               if (dstSurf) {
                  blit.dst.resource = dstSurf->texture;
                  blit.dst.level = dstSurf->u.tex.level;
                  blit.dst.box.z = dstSurf->u.tex.first_layer;
                  blit.dst.format = dstSurf->format;

                  blit.src.resource = srcSurf->texture;
                  blit.src.level = srcSurf->u.tex.level;
                  blit.src.box.z = srcSurf->u.tex.first_layer;
                  blit.src.format = srcSurf->format;

                  st_adjust_blit_for_srgb(&blit, ctx->Color.sRGBEnabled);

                  st->pipe->blit(st->pipe, &blit);
                  dstRb->defined = true; /* front buffer tracking */
               }
            }
         }
      }
   }

   if (mask & depthStencil) {
      /* depth and/or stencil blit */

      /* get src/dst depth surfaces */
      struct st_renderbuffer *srcDepthRb =
         st_renderbuffer(readFB->Attachment[BUFFER_DEPTH].Renderbuffer);
      struct st_renderbuffer *dstDepthRb = 
         st_renderbuffer(drawFB->Attachment[BUFFER_DEPTH].Renderbuffer);
      struct pipe_surface *dstDepthSurf =
         dstDepthRb ? dstDepthRb->surface : NULL;

      struct st_renderbuffer *srcStencilRb =
         st_renderbuffer(readFB->Attachment[BUFFER_STENCIL].Renderbuffer);
      struct st_renderbuffer *dstStencilRb =
         st_renderbuffer(drawFB->Attachment[BUFFER_STENCIL].Renderbuffer);
      struct pipe_surface *dstStencilSurf =
         dstStencilRb ? dstStencilRb->surface : NULL;

      if (_mesa_has_depthstencil_combined(readFB) &&
          _mesa_has_depthstencil_combined(drawFB)) {
         blit.mask = 0;
         if (mask & GL_DEPTH_BUFFER_BIT)
            blit.mask |= PIPE_MASK_Z;
         if (mask & GL_STENCIL_BUFFER_BIT)
            blit.mask |= PIPE_MASK_S;

         blit.dst.resource = dstDepthSurf->texture;
         blit.dst.level = dstDepthSurf->u.tex.level;
         blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
         blit.dst.format = dstDepthSurf->format;

         blit.src.resource = srcDepthRb->texture;
         blit.src.level = srcDepthRb->surface->u.tex.level;
         blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
         blit.src.format = srcDepthRb->surface->format;

         st->pipe->blit(st->pipe, &blit);
      }
      else {
         /* blitting depth and stencil separately */

         if (mask & GL_DEPTH_BUFFER_BIT) {
            blit.mask = PIPE_MASK_Z;

            blit.dst.resource = dstDepthSurf->texture;
            blit.dst.level = dstDepthSurf->u.tex.level;
            blit.dst.box.z = dstDepthSurf->u.tex.first_layer;
            blit.dst.format = dstDepthSurf->format;

            blit.src.resource = srcDepthRb->texture;
            blit.src.level = srcDepthRb->surface->u.tex.level;
            blit.src.box.z = srcDepthRb->surface->u.tex.first_layer;
            blit.src.format = srcDepthRb->surface->format;

            st->pipe->blit(st->pipe, &blit);
         }

         if (mask & GL_STENCIL_BUFFER_BIT) {
            blit.mask = PIPE_MASK_S;

            blit.dst.resource = dstStencilSurf->texture;
            blit.dst.level = dstStencilSurf->u.tex.level;
            blit.dst.box.z = dstStencilSurf->u.tex.first_layer;
            blit.dst.format = dstStencilSurf->format;

            blit.src.resource = srcStencilRb->texture;
            blit.src.level = srcStencilRb->surface->u.tex.level;
            blit.src.box.z = srcStencilRb->surface->u.tex.first_layer;
            blit.src.format = srcStencilRb->surface->format;

            st->pipe->blit(st->pipe, &blit);
         }
      }
   }
}