123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301 |
- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkClipOp.h"
- #include "include/core/SkColorSpace.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRRect.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkRegion.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTypes.h"
- #include "include/gpu/GrBackendSurface.h"
- #include "include/gpu/GrContext.h"
- #include "include/private/GrTypesPriv.h"
- #include "include/private/SkColorData.h"
- #include "src/core/SkClipOpPriv.h"
- #include "src/core/SkClipStack.h"
- #include "src/gpu/GrAppliedClip.h"
- #include "src/gpu/GrCaps.h"
- #include "src/gpu/GrClip.h"
- #include "src/gpu/GrContextPriv.h"
- #include "src/gpu/GrFixedClip.h"
- #include "src/gpu/GrFragmentProcessor.h"
- #include "src/gpu/GrPaint.h"
- #include "src/gpu/GrReducedClip.h"
- #include "src/gpu/GrRenderTargetContext.h"
- #include "src/gpu/GrRenderTargetContextPriv.h"
- #include "src/gpu/GrStencilClip.h"
- #include "src/gpu/GrTextureProxy.h"
- #include "src/gpu/GrUserStencilSettings.h"
- #include "src/gpu/effects/GrTextureDomain.h"
- #include "tools/ToolUtils.h"
- #include <utility>
- class GrRecordingContext;
- constexpr static SkIRect kDeviceRect = {0, 0, 600, 600};
- constexpr static SkIRect kCoverRect = {50, 50, 550, 550};
- namespace skiagm {
- ////////////////////////////////////////////////////////////////////////////////////////////////////
- class WindowRectanglesBaseGM : public GM {
- protected:
- virtual DrawResult onCoverClipStack(const SkClipStack&, SkCanvas*, SkString* errorMsg) = 0;
- private:
- SkISize onISize() override { return SkISize::Make(kDeviceRect.width(), kDeviceRect.height()); }
- DrawResult onDraw(SkCanvas*, SkString* errorMsg) final;
- };
- DrawResult WindowRectanglesBaseGM::onDraw(SkCanvas* canvas, SkString* errorMsg) {
- ToolUtils::draw_checkerboard(canvas, 0xffffffff, 0xffc6c3c6, 25);
- SkClipStack stack;
- stack.clipRect(SkRect::MakeXYWH(370.75, 80.25, 149, 100), SkMatrix::I(),
- kDifference_SkClipOp, false);
- stack.clipRect(SkRect::MakeXYWH(80.25, 420.75, 150, 100), SkMatrix::I(),
- kDifference_SkClipOp, true);
- stack.clipRRect(SkRRect::MakeRectXY(SkRect::MakeXYWH(200, 200, 200, 200), 60, 45),
- SkMatrix::I(), kDifference_SkClipOp, true);
- SkRRect nine;
- nine.setNinePatch(SkRect::MakeXYWH(550 - 30.25 - 100, 370.75, 100, 150), 12, 35, 23, 20);
- stack.clipRRect(nine, SkMatrix::I(), kDifference_SkClipOp, true);
- SkRRect complx;
- SkVector complxRadii[4] = {{6, 4}, {8, 12}, {16, 24}, {48, 32}};
- complx.setRectRadii(SkRect::MakeXYWH(80.25, 80.75, 100, 149), complxRadii);
- stack.clipRRect(complx, SkMatrix::I(), kDifference_SkClipOp, false);
- return this->onCoverClipStack(stack, canvas, errorMsg);
- }
- ////////////////////////////////////////////////////////////////////////////////////////////////////
- /**
- * Draws a clip that will exercise window rectangles if they are supported.
- */
- class WindowRectanglesGM : public WindowRectanglesBaseGM {
- private:
- SkString onShortName() final { return SkString("windowrectangles"); }
- DrawResult onCoverClipStack(const SkClipStack&, SkCanvas*, SkString* errorMsg) final;
- };
- DrawResult WindowRectanglesGM::onCoverClipStack(const SkClipStack& stack, SkCanvas* canvas,
- SkString* errorMsg) {
- SkPaint paint;
- paint.setColor(0xff00aa80);
- // Set up the canvas's clip to match our SkClipStack.
- SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart);
- for (const SkClipStack::Element* element = iter.next(); element; element = iter.next()) {
- SkClipOp op = element->getOp();
- bool isAA = element->isAA();
- switch (element->getDeviceSpaceType()) {
- case SkClipStack::Element::DeviceSpaceType::kPath:
- canvas->clipPath(element->getDeviceSpacePath(), op, isAA);
- break;
- case SkClipStack::Element::DeviceSpaceType::kRRect:
- canvas->clipRRect(element->getDeviceSpaceRRect(), op, isAA);
- break;
- case SkClipStack::Element::DeviceSpaceType::kRect:
- canvas->clipRect(element->getDeviceSpaceRect(), op, isAA);
- break;
- case SkClipStack::Element::DeviceSpaceType::kEmpty:
- canvas->clipRect({ 0, 0, 0, 0 }, kIntersect_SkClipOp, false);
- break;
- }
- }
- canvas->drawRect(SkRect::Make(kCoverRect), paint);
- return DrawResult::kOk;
- }
- DEF_GM( return new WindowRectanglesGM(); )
- ////////////////////////////////////////////////////////////////////////////////////////////////////
- constexpr static int kNumWindows = 8;
- /**
- * Visualizes the mask (alpha or stencil) for a clip with several window rectangles. The purpose of
- * this test is to verify that window rectangles are being used during clip mask generation, and to
- * visualize where the window rectangles are placed.
- *
- * We use window rectangles when generating the clip mask because there is no need to invest time
- * defining those regions where window rectangles will be in effect during the actual draw anyway.
- *
- * This test works by filling the entire clip mask with a small checkerboard pattern before drawing
- * it, and then covering the mask with a solid color once it has been generated. The regions inside
- * window rectangles or outside the scissor should still have the initial checkerboard intact.
- */
- class WindowRectanglesMaskGM : public WindowRectanglesBaseGM {
- private:
- constexpr static int kMaskCheckerSize = 5;
- SkString onShortName() final { return SkString("windowrectangles_mask"); }
- DrawResult onCoverClipStack(const SkClipStack&, SkCanvas*, SkString* errorMsg) final;
- void visualizeAlphaMask(GrContext*, GrRenderTargetContext*, const GrReducedClip&, GrPaint&&);
- void visualizeStencilMask(GrContext*, GrRenderTargetContext*, const GrReducedClip&, GrPaint&&);
- void stencilCheckerboard(GrRenderTargetContext*, bool flip);
- };
- /**
- * Base class for GrClips that visualize a clip mask.
- */
- class MaskOnlyClipBase : public GrClip {
- private:
- bool quickContains(const SkRect&) const final { return false; }
- bool isRRect(const SkRect& rtBounds, SkRRect* rr, GrAA*) const final { return false; }
- void getConservativeBounds(int width, int height, SkIRect* rect, bool* iior) const final {
- rect->set(0, 0, width, height);
- if (iior) {
- *iior = false;
- }
- }
- };
- /**
- * This class clips a cover by an alpha mask. We use it to visualize the alpha clip mask.
- */
- class AlphaOnlyClip final : public MaskOnlyClipBase {
- public:
- AlphaOnlyClip(sk_sp<GrTextureProxy> mask, int x, int y) : fMask(mask), fX(x), fY(y) {}
- private:
- bool apply(GrRecordingContext*, GrRenderTargetContext*, bool, bool, GrAppliedClip* out,
- SkRect* bounds) const override {
- int w = fMask->width();
- int h = fMask->height();
- out->addCoverageFP(GrDeviceSpaceTextureDecalFragmentProcessor::Make(
- fMask, SkIRect::MakeWH(w, h), {fX, fY}));
- return true;
- }
- sk_sp<GrTextureProxy> fMask;
- int fX;
- int fY;
- };
- /**
- * Makes a clip object that enforces the stencil clip bit. Used to visualize the stencil mask.
- */
- static GrStencilClip make_stencil_only_clip() {
- return GrStencilClip(SkClipStack::kEmptyGenID);
- };
- DrawResult WindowRectanglesMaskGM::onCoverClipStack(const SkClipStack& stack, SkCanvas* canvas,
- SkString* errorMsg) {
- GrContext* ctx = canvas->getGrContext();
- GrRenderTargetContext* rtc = canvas->internal_private_accessTopLayerRenderTargetContext();
- if (!ctx || !rtc) {
- *errorMsg = kErrorMsg_DrawSkippedGpuOnly;
- return DrawResult::kSkip;
- }
- if (rtc->priv().maxWindowRectangles() < kNumWindows) {
- *errorMsg = "Requires at least 8 window rectangles. "
- "(Are you off FBO 0? Use sRGB to force offscreen rendering.)";
- return DrawResult::kSkip;
- }
- const GrReducedClip reducedClip(stack, SkRect::Make(kCoverRect), rtc->caps(), kNumWindows);
- GrPaint paint;
- if (rtc->numSamples() <= 1) {
- paint.setColor4f({ 0, 0.25f, 1, 1 });
- this->visualizeAlphaMask(ctx, rtc, reducedClip, std::move(paint));
- } else {
- paint.setColor4f({ 1, 0.25f, 0.25f, 1 });
- this->visualizeStencilMask(ctx, rtc, reducedClip, std::move(paint));
- }
- return DrawResult::kOk;
- }
- void WindowRectanglesMaskGM::visualizeAlphaMask(GrContext* ctx, GrRenderTargetContext* rtc,
- const GrReducedClip& reducedClip, GrPaint&& paint) {
- const int padRight = (kDeviceRect.right() - kCoverRect.right()) / 2;
- const int padBottom = (kDeviceRect.bottom() - kCoverRect.bottom()) / 2;
- sk_sp<GrRenderTargetContext> maskRTC(ctx->priv().makeDeferredRenderTargetContextWithFallback(
- SkBackingFit::kExact, kCoverRect.width() + padRight, kCoverRect.height() + padBottom,
- GrColorType::kAlpha_8, nullptr));
- if (!maskRTC) {
- return;
- }
- // Draw a checker pattern into the alpha mask so we can visualize the regions left untouched by
- // the clip mask generation.
- this->stencilCheckerboard(maskRTC.get(), true);
- maskRTC->clear(nullptr, SK_PMColor4fWHITE, GrRenderTargetContext::CanClearFullscreen::kYes);
- GrPaint stencilPaint;
- stencilPaint.setCoverageSetOpXPFactory(SkRegion::kDifference_Op, false);
- maskRTC->priv().stencilRect(make_stencil_only_clip(), &GrUserStencilSettings::kUnused,
- std::move(stencilPaint), GrAA::kNo, SkMatrix::I(),
- SkRect::MakeIWH(maskRTC->width(), maskRTC->height()));
- reducedClip.drawAlphaClipMask(maskRTC.get());
- int x = kCoverRect.x() - kDeviceRect.x(),
- y = kCoverRect.y() - kDeviceRect.y();
- // Now visualize the alpha mask by drawing a rect over the area where it is defined. The regions
- // inside window rectangles or outside the scissor should still have the initial checkerboard
- // intact. (This verifies we didn't spend any time modifying those pixels in the mask.)
- AlphaOnlyClip clip(maskRTC->asTextureProxyRef(), x, y);
- rtc->drawRect(clip, std::move(paint), GrAA::kYes, SkMatrix::I(),
- SkRect::Make(SkIRect::MakeXYWH(x, y, maskRTC->width(), maskRTC->height())));
- }
- void WindowRectanglesMaskGM::visualizeStencilMask(GrContext* ctx, GrRenderTargetContext* rtc,
- const GrReducedClip& reducedClip,
- GrPaint&& paint) {
- // Draw a checker pattern into the stencil buffer so we can visualize the regions left untouched
- // by the clip mask generation.
- this->stencilCheckerboard(rtc, false);
- reducedClip.drawStencilClipMask(ctx, rtc);
- // Now visualize the stencil mask by covering the entire render target. The regions inside
- // window rectangles or outside the scissor should still have the initial checkerboard intact.
- // (This verifies we didn't spend any time modifying those pixels in the mask.)
- rtc->drawPaint(make_stencil_only_clip(), std::move(paint), SkMatrix::I());
- }
- void WindowRectanglesMaskGM::stencilCheckerboard(GrRenderTargetContext* rtc, bool flip) {
- constexpr static GrUserStencilSettings kSetClip(
- GrUserStencilSettings::StaticInit<
- 0,
- GrUserStencilTest::kAlways,
- 0,
- GrUserStencilOp::kSetClipBit,
- GrUserStencilOp::kKeep,
- 0>()
- );
- rtc->priv().clearStencilClip(GrFixedClip::Disabled(), false);
- for (int y = 0; y < kDeviceRect.height(); y += kMaskCheckerSize) {
- for (int x = (y & 1) == flip ? 0 : kMaskCheckerSize;
- x < kDeviceRect.width(); x += 2 * kMaskCheckerSize) {
- SkIRect checker = SkIRect::MakeXYWH(x, y, kMaskCheckerSize, kMaskCheckerSize);
- GrPaint paint;
- paint.setXPFactory(GrDisableColorXPFactory::Get());
- rtc->priv().stencilRect(GrNoClip(), &kSetClip, std::move(paint), GrAA::kNo,
- SkMatrix::I(), SkRect::Make(checker));
- }
- }
- }
- DEF_GM( return new WindowRectanglesMaskGM(); )
- }
|