/** * 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; }
/** * 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; }
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); } } } }