| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrCopySurfaceOp.h" |
| |
| #include "GrGpu.h" |
| #include "GrMemoryPool.h" |
| #include "GrRecordingContext.h" |
| #include "GrRecordingContextPriv.h" |
| |
| // returns true if the read/written rect intersects the src/dst and false if not. |
| static bool clip_src_rect_and_dst_point(const GrSurfaceProxy* dst, |
| const GrSurfaceProxy* src, |
| const SkIRect& srcRect, |
| const SkIPoint& dstPoint, |
| SkIRect* clippedSrcRect, |
| SkIPoint* clippedDstPoint) { |
| *clippedSrcRect = srcRect; |
| *clippedDstPoint = dstPoint; |
| |
| // clip the left edge to src and dst bounds, adjusting dstPoint if necessary |
| if (clippedSrcRect->fLeft < 0) { |
| clippedDstPoint->fX -= clippedSrcRect->fLeft; |
| clippedSrcRect->fLeft = 0; |
| } |
| if (clippedDstPoint->fX < 0) { |
| clippedSrcRect->fLeft -= clippedDstPoint->fX; |
| clippedDstPoint->fX = 0; |
| } |
| |
| // clip the top edge to src and dst bounds, adjusting dstPoint if necessary |
| if (clippedSrcRect->fTop < 0) { |
| clippedDstPoint->fY -= clippedSrcRect->fTop; |
| clippedSrcRect->fTop = 0; |
| } |
| if (clippedDstPoint->fY < 0) { |
| clippedSrcRect->fTop -= clippedDstPoint->fY; |
| clippedDstPoint->fY = 0; |
| } |
| |
| // clip the right edge to the src and dst bounds. |
| if (clippedSrcRect->fRight > src->width()) { |
| clippedSrcRect->fRight = src->width(); |
| } |
| if (clippedDstPoint->fX + clippedSrcRect->width() > dst->width()) { |
| clippedSrcRect->fRight = clippedSrcRect->fLeft + dst->width() - clippedDstPoint->fX; |
| } |
| |
| // clip the bottom edge to the src and dst bounds. |
| if (clippedSrcRect->fBottom > src->height()) { |
| clippedSrcRect->fBottom = src->height(); |
| } |
| if (clippedDstPoint->fY + clippedSrcRect->height() > dst->height()) { |
| clippedSrcRect->fBottom = clippedSrcRect->fTop + dst->height() - clippedDstPoint->fY; |
| } |
| |
| // The above clipping steps may have inverted the rect if it didn't intersect either the src or |
| // dst bounds. |
| return !clippedSrcRect->isEmpty(); |
| } |
| |
| std::unique_ptr<GrOp> GrCopySurfaceOp::Make(GrRecordingContext* context, |
| GrSurfaceProxy* dstProxy, |
| GrSurfaceProxy* srcProxy, |
| const SkIRect& srcRect, |
| const SkIPoint& dstPoint) { |
| SkASSERT(dstProxy); |
| SkASSERT(srcProxy); |
| SkIRect clippedSrcRect; |
| SkIPoint clippedDstPoint; |
| // If the rect is outside the srcProxy or dstProxy then we've already succeeded. |
| if (!clip_src_rect_and_dst_point(dstProxy, srcProxy, srcRect, dstPoint, |
| &clippedSrcRect, &clippedDstPoint)) { |
| return nullptr; |
| } |
| if (GrPixelConfigIsCompressed(dstProxy->config())) { |
| return nullptr; |
| } |
| |
| GrOpMemoryPool* pool = context->priv().opMemoryPool(); |
| |
| return pool->allocate<GrCopySurfaceOp>(dstProxy, srcProxy, clippedSrcRect, clippedDstPoint); |
| } |
| |
| void GrCopySurfaceOp::onExecute(GrOpFlushState* state, const SkRect& chainBounds) { |
| SkASSERT(fSrc.get()->isInstantiated()); |
| |
| state->commandBuffer()->copy(fSrc.get()->peekSurface(), fSrc.get()->origin(), fSrcRect, |
| fDstPoint); |
| } |