| /************************************************************************** |
| * |
| * Copyright 2003 VMware, Inc. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| #include "main/glheader.h" |
| #include "main/enums.h" |
| #include "main/mtypes.h" |
| #include "main/macros.h" |
| #include "main/fbobject.h" |
| #include "main/image.h" |
| #include "main/bufferobj.h" |
| #include "main/readpix.h" |
| #include "main/state.h" |
| |
| #include "intel_screen.h" |
| #include "intel_context.h" |
| #include "intel_blit.h" |
| #include "intel_buffers.h" |
| #include "intel_fbo.h" |
| #include "intel_mipmap_tree.h" |
| #include "intel_regions.h" |
| #include "intel_pixel.h" |
| #include "intel_buffer_objects.h" |
| |
| #define FILE_DEBUG_FLAG DEBUG_PIXEL |
| |
| /* For many applications, the new ability to pull the source buffers |
| * back out of the GTT and then do the packing/conversion operations |
| * in software will be as much of an improvement as trying to get the |
| * blitter and/or texture engine to do the work. |
| * |
| * This step is gated on private backbuffers. |
| * |
| * Obviously the frontbuffer can't be pulled back, so that is either |
| * an argument for blit/texture readpixels, or for blitting to a |
| * temporary and then pulling that back. |
| * |
| * When the destination is a pbo, however, it's not clear if it is |
| * ever going to be pulled to main memory (though the access param |
| * will be a good hint). So it sounds like we do want to be able to |
| * choose between blit/texture implementation on the gpu and pullback |
| * and cpu-based copying. |
| * |
| * Unless you can magically turn client memory into a PBO for the |
| * duration of this call, there will be a cpu-based copying step in |
| * any case. |
| */ |
| |
| static bool |
| do_blit_readpixels(struct gl_context * ctx, |
| GLint x, GLint y, GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *pack, GLvoid * pixels) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| struct intel_buffer_object *dst = intel_buffer_object(pack->BufferObj); |
| GLuint dst_offset; |
| drm_intel_bo *dst_buffer; |
| GLint dst_x, dst_y; |
| GLuint dirty; |
| |
| DBG("%s\n", __func__); |
| |
| assert(_mesa_is_bufferobj(pack->BufferObj)); |
| |
| struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; |
| struct intel_renderbuffer *irb = intel_renderbuffer(rb); |
| |
| if (ctx->_ImageTransferState || |
| !_mesa_format_matches_format_and_type(irb->mt->format, format, type, |
| false, NULL)) { |
| DBG("%s - bad format for blit\n", __func__); |
| return false; |
| } |
| |
| if (pack->SwapBytes || pack->LsbFirst) { |
| DBG("%s: bad packing params\n", __func__); |
| return false; |
| } |
| |
| int dst_stride = _mesa_image_row_stride(pack, width, format, type); |
| bool dst_flip = false; |
| /* Mesa flips the dst_stride for pack->Invert, but we want our mt to have a |
| * normal dst_stride. |
| */ |
| if (pack->Invert) { |
| dst_stride = -dst_stride; |
| dst_flip = true; |
| } |
| |
| dst_offset = (GLintptr)pixels; |
| dst_offset += _mesa_image_offset(2, pack, width, height, |
| format, type, 0, 0, 0); |
| |
| if (!_mesa_clip_copytexsubimage(ctx, |
| &dst_x, &dst_y, |
| &x, &y, |
| &width, &height)) { |
| return true; |
| } |
| |
| dirty = intel->front_buffer_dirty; |
| intel_prepare_render(intel); |
| intel->front_buffer_dirty = dirty; |
| |
| dst_buffer = intel_bufferobj_buffer(intel, dst); |
| |
| struct intel_mipmap_tree *pbo_mt = |
| intel_miptree_create_for_bo(intel, |
| dst_buffer, |
| irb->mt->format, |
| dst_offset, |
| width, height, |
| dst_stride, I915_TILING_NONE); |
| |
| if (!intel_miptree_blit(intel, |
| irb->mt, irb->mt_level, irb->mt_layer, |
| x, y, _mesa_is_winsys_fbo(ctx->ReadBuffer), |
| pbo_mt, 0, 0, |
| 0, 0, dst_flip, |
| width, height, GL_COPY)) { |
| intel_miptree_release(&pbo_mt); |
| return false; |
| } |
| |
| intel_miptree_release(&pbo_mt); |
| |
| DBG("%s - DONE\n", __func__); |
| |
| return true; |
| } |
| |
| void |
| intelReadPixels(struct gl_context * ctx, |
| GLint x, GLint y, GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *pack, GLvoid * pixels) |
| { |
| struct intel_context *intel = intel_context(ctx); |
| bool dirty; |
| |
| intel_flush_rendering_to_batch(ctx); |
| |
| DBG("%s\n", __func__); |
| |
| if (_mesa_is_bufferobj(pack->BufferObj)) { |
| /* Using PBOs, so try the BLT based path. */ |
| if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, |
| pixels)) { |
| return; |
| } |
| |
| perf_debug("%s: fallback to CPU mapping in PBO case\n", __func__); |
| } |
| |
| /* glReadPixels() wont dirty the front buffer, so reset the dirty |
| * flag after calling intel_prepare_render(). */ |
| dirty = intel->front_buffer_dirty; |
| intel_prepare_render(intel); |
| intel->front_buffer_dirty = dirty; |
| |
| /* Update Mesa state before calling _mesa_readpixels(). |
| * XXX this may not be needed since ReadPixels no longer uses the |
| * span code. |
| */ |
| |
| if (ctx->NewState) |
| _mesa_update_state(ctx); |
| |
| _mesa_readpixels(ctx, x, y, width, height, format, type, pack, pixels); |
| |
| /* There's an intel_prepare_render() call in intelSpanRenderStart(). */ |
| intel->front_buffer_dirty = dirty; |
| } |
