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/*
* 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 "GrContext.h"
#include "GrContextPriv.h"
#include "GrGpu.h"
#include "GrMemoryPool.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(GrContext* 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;
}
GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();
return pool->allocate<GrCopySurfaceOp>(dstProxy, srcProxy, clippedSrcRect, clippedDstPoint);
}
void GrCopySurfaceOp::onExecute(GrOpFlushState* state) {
if (!fSrc.get()->instantiate(state->resourceProvider())) {
return;
}
state->commandBuffer()->copy(fSrc.get()->priv().peekSurface(), fSrc.get()->origin(),
fSrcRect, fDstPoint);
}
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