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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTypes.h"
#include "Test.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrClip.h"
#include "GrRenderTargetContext.h"
#include "GrRenderTargetContextPriv.h"
#include "GrShape.h"
#include "GrPathRenderer.h"
#include "GrPaint.h"
#include "SkMatrix.h"
#include "SkRect.h"
#include "ccpr/GrCoverageCountingPathRenderer.h"
#include <cmath>
static constexpr int kCanvasSize = 100;
class CCPRPathDrawer {
public:
CCPRPathDrawer(GrContext* ctx)
: fCtx(ctx)
, fCCPR(GrCoverageCountingPathRenderer::CreateIfSupported(*fCtx->caps()))
, fRTC(fCtx->makeDeferredRenderTargetContext(SkBackingFit::kExact, kCanvasSize,
kCanvasSize, kRGBA_8888_GrPixelConfig,
nullptr)) {
if (fCCPR) {
fCtx->contextPriv().addOnFlushCallbackObject(fCCPR.get());
}
}
~CCPRPathDrawer() {
if (fCCPR) {
fCtx->contextPriv().testingOnly_flushAndRemoveOnFlushCallbackObject(fCCPR.get());
}
}
bool valid() { return fCCPR && fRTC; }
void clear() { fRTC->clear(nullptr, 0, true); }
void drawPath(const SkPath& path, GrColor4f color = GrColor4f(0, 1, 0, 1)) {
GrPaint paint;
paint.setColor4f(color);
GrNoClip noClip;
SkIRect clipBounds = SkIRect::MakeWH(kCanvasSize, kCanvasSize);
SkMatrix matrix = SkMatrix::I();
GrShape shape(path);
fCCPR->drawPath({fCtx, std::move(paint), &GrUserStencilSettings::kUnused, fRTC.get(),
&noClip, &clipBounds, &matrix, &shape, GrAAType::kCoverage, false});
}
void flush() {
fCtx->flush();
}
private:
GrContext* const fCtx;
sk_sp<GrCoverageCountingPathRenderer> fCCPR;
sk_sp<GrRenderTargetContext> fRTC;
};
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GrCCPRTest, reporter, ctxInfo) {
GrContext* const ctx = ctxInfo.grContext();
if (!GrCoverageCountingPathRenderer::IsSupported(*ctx->caps())) {
return;
}
CCPRPathDrawer ccpr(ctx);
if (!ccpr.valid()) {
ERRORF(reporter, "could not create render target context for ccpr.");
return;
}
// Test very busy paths.
static constexpr int kNumBusyVerbs = 1 << 17;
ccpr.clear();
SkPath busyPath;
busyPath.moveTo(0, 0); // top left
busyPath.lineTo(kCanvasSize, kCanvasSize); // bottom right
for (int i = 2; i < kNumBusyVerbs; ++i) {
float offset = i * ((float)kCanvasSize / kNumBusyVerbs);
busyPath.lineTo(kCanvasSize - offset, kCanvasSize + offset); // offscreen
}
ccpr.drawPath(busyPath);
ccpr.flush(); // If this doesn't crash, the test passed.
// If it does, maybe fiddle with fMaxInstancesPerDrawArraysWithoutCrashing in your
// platform's GrGLCaps.
}
#endif
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