1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "GrCopySurfaceOp.h"
9 #include "GrGpu.h"
10
11 // returns true if the read/written rect intersects the src/dst and false if not.
clip_src_rect_and_dst_point(const GrSurfaceProxy * dst,const GrSurfaceProxy * src,const SkIRect & srcRect,const SkIPoint & dstPoint,SkIRect * clippedSrcRect,SkIPoint * clippedDstPoint)12 static bool clip_src_rect_and_dst_point(const GrSurfaceProxy* dst,
13 const GrSurfaceProxy* src,
14 const SkIRect& srcRect,
15 const SkIPoint& dstPoint,
16 SkIRect* clippedSrcRect,
17 SkIPoint* clippedDstPoint) {
18 *clippedSrcRect = srcRect;
19 *clippedDstPoint = dstPoint;
20
21 // clip the left edge to src and dst bounds, adjusting dstPoint if necessary
22 if (clippedSrcRect->fLeft < 0) {
23 clippedDstPoint->fX -= clippedSrcRect->fLeft;
24 clippedSrcRect->fLeft = 0;
25 }
26 if (clippedDstPoint->fX < 0) {
27 clippedSrcRect->fLeft -= clippedDstPoint->fX;
28 clippedDstPoint->fX = 0;
29 }
30
31 // clip the top edge to src and dst bounds, adjusting dstPoint if necessary
32 if (clippedSrcRect->fTop < 0) {
33 clippedDstPoint->fY -= clippedSrcRect->fTop;
34 clippedSrcRect->fTop = 0;
35 }
36 if (clippedDstPoint->fY < 0) {
37 clippedSrcRect->fTop -= clippedDstPoint->fY;
38 clippedDstPoint->fY = 0;
39 }
40
41 // clip the right edge to the src and dst bounds.
42 if (clippedSrcRect->fRight > src->width()) {
43 clippedSrcRect->fRight = src->width();
44 }
45 if (clippedDstPoint->fX + clippedSrcRect->width() > dst->width()) {
46 clippedSrcRect->fRight = clippedSrcRect->fLeft + dst->width() - clippedDstPoint->fX;
47 }
48
49 // clip the bottom edge to the src and dst bounds.
50 if (clippedSrcRect->fBottom > src->height()) {
51 clippedSrcRect->fBottom = src->height();
52 }
53 if (clippedDstPoint->fY + clippedSrcRect->height() > dst->height()) {
54 clippedSrcRect->fBottom = clippedSrcRect->fTop + dst->height() - clippedDstPoint->fY;
55 }
56
57 // The above clipping steps may have inverted the rect if it didn't intersect either the src or
58 // dst bounds.
59 return !clippedSrcRect->isEmpty();
60 }
61
Make(GrSurfaceProxy * dstProxy,GrSurfaceProxy * srcProxy,const SkIRect & srcRect,const SkIPoint & dstPoint)62 std::unique_ptr<GrOp> GrCopySurfaceOp::Make(GrSurfaceProxy* dstProxy, GrSurfaceProxy* srcProxy,
63 const SkIRect& srcRect,
64 const SkIPoint& dstPoint) {
65 SkASSERT(dstProxy);
66 SkASSERT(srcProxy);
67 if (GrPixelConfigIsSint(dstProxy->config()) != GrPixelConfigIsSint(srcProxy->config())) {
68 return nullptr;
69 }
70 SkIRect clippedSrcRect;
71 SkIPoint clippedDstPoint;
72 // If the rect is outside the srcProxy or dstProxy then we've already succeeded.
73 if (!clip_src_rect_and_dst_point(dstProxy, srcProxy, srcRect, dstPoint,
74 &clippedSrcRect, &clippedDstPoint)) {
75 return nullptr;
76 }
77
78 return std::unique_ptr<GrOp>(new GrCopySurfaceOp(dstProxy, srcProxy,
79 clippedSrcRect, clippedDstPoint));
80 }
81
onExecute(GrOpFlushState * state)82 void GrCopySurfaceOp::onExecute(GrOpFlushState* state) {
83 if (!fSrc.get()->instantiate(state->resourceProvider())) {
84 return;
85 }
86
87 state->commandBuffer()->copy(fSrc.get()->priv().peekSurface(), fSrc.get()->origin(),
88 fSrcRect, fDstPoint);
89 }
90