skia2/gm/windowrectangles.cpp
Brian Salomon 82f4431915 Make GrPaints move their GrProcessor ownership into GrPipelineBuilder.
This makes GrPaints usable only once. In some places we must make copies in order to issue draws with the same paint state.

Change-Id: Ie816e5185ce93a064111cad64c6880e1e21184c2
Reviewed-on: https://skia-review.googlesource.com/6844
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2017-01-11 19:56:48 +00:00

294 lines
11 KiB
C++

/*
* 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.h"
#include "SkClipStack.h"
#include "SkRRect.h"
#if SK_SUPPORT_GPU
# include "GrAppliedClip.h"
# include "GrRenderTargetContext.h"
# include "GrRenderTargetContextPriv.h"
# include "GrFixedClip.h"
# include "GrReducedClip.h"
# include "GrRenderTargetPriv.h"
# include "GrResourceProvider.h"
# include "effects/GrTextureDomain.h"
#endif
constexpr static SkIRect kDeviceRect = {0, 0, 600, 600};
constexpr static SkIRect kLayerRect = {25, 25, 575, 575};
constexpr static SkIRect kCoverRect = {50, 50, 550, 550};
namespace skiagm {
////////////////////////////////////////////////////////////////////////////////////////////////////
class WindowRectanglesBaseGM : public GM {
protected:
virtual void onCoverClipStack(const SkClipStack&, SkCanvas*) = 0;
private:
SkISize onISize() override { return SkISize::Make(kDeviceRect.width(), kDeviceRect.height()); }
void onDraw(SkCanvas*) final;
};
void WindowRectanglesBaseGM::onDraw(SkCanvas* canvas) {
sk_tool_utils::draw_checkerboard(canvas, 0xffffffff, 0xffc6c3c6, 25);
canvas->saveLayer(SkRect::Make(kLayerRect), nullptr);
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);
this->onCoverClipStack(stack, canvas);
canvas->restore();
}
////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Draws a clip that will exercise window rectangles if they are supported.
*/
class WindowRectanglesGM : public WindowRectanglesBaseGM {
private:
SkString onShortName() final { return SkString("windowrectangles"); }
void onCoverClipStack(const SkClipStack&, SkCanvas*) final;
};
/**
* This is a simple helper class for resetting a canvas's clip to our test's SkClipStack.
*/
class ReplayClipStackVisitor final : public SkCanvasClipVisitor {
public:
typedef SkClipOp Op;
ReplayClipStackVisitor(SkCanvas* canvas) : fCanvas(canvas) {}
void clipRect(const SkRect& r, Op op, bool aa) override { fCanvas->clipRect(r, op, aa); }
void clipRRect(const SkRRect& rr, Op op, bool aa) override { fCanvas->clipRRect(rr, op, aa); }
void clipPath(const SkPath&, Op, bool) override { SkFAIL("Not implemented"); }
private:
SkCanvas* const fCanvas;
};
void WindowRectanglesGM::onCoverClipStack(const SkClipStack& stack, SkCanvas* canvas) {
SkPaint paint;
paint.setColor(0xff00aa80);
// Set up the canvas's clip to match our SkClipStack.
ReplayClipStackVisitor visitor(canvas);
SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart);
for (const SkClipStack::Element* element = iter.next(); element; element = iter.next()) {
element->replay(&visitor);
}
canvas->drawRect(SkRect::Make(kCoverRect), paint);
}
DEF_GM( return new WindowRectanglesGM(); )
////////////////////////////////////////////////////////////////////////////////////////////////////
#if SK_SUPPORT_GPU
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"); }
void onCoverClipStack(const SkClipStack&, SkCanvas*) final;
void visualizeAlphaMask(GrContext*, GrRenderTargetContext*, const GrReducedClip&, GrPaint&&);
void visualizeStencilMask(GrContext*, GrRenderTargetContext*, const GrReducedClip&, GrPaint&&);
void stencilCheckerboard(GrRenderTargetContext*, bool flip);
void fail(SkCanvas*);
};
/**
* 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(GrTexture* mask, int x, int y) {
int w = mask->width(), h = mask->height();
fFP = GrDeviceSpaceTextureDecalFragmentProcessor::Make(mask, SkIRect::MakeWH(w, h), {x, y});
}
private:
bool apply(GrContext*, GrRenderTargetContext*, bool, bool, GrAppliedClip* out) const override {
out->addCoverageFP(fFP);
return true;
}
sk_sp<GrFragmentProcessor> fFP;
};
/**
* This class clips a cover by the stencil clip bit. We use it to visualize the stencil mask.
*/
class StencilOnlyClip final : public MaskOnlyClipBase {
private:
bool apply(GrContext*, GrRenderTargetContext*, bool, bool, GrAppliedClip* out) const override {
out->addStencilClip();
return true;
}
};
void WindowRectanglesMaskGM::onCoverClipStack(const SkClipStack& stack, SkCanvas* canvas) {
GrContext* ctx = canvas->getGrContext();
GrRenderTargetContext* rtc = canvas->internal_private_accessTopLayerRenderTargetContext();
if (!ctx || !rtc || rtc->priv().maxWindowRectangles() < kNumWindows) {
this->fail(canvas);
return;
}
const GrReducedClip reducedClip(stack, SkRect::Make(kCoverRect), kNumWindows);
GrPaint paint;
if (!rtc->isStencilBufferMultisampled()) {
paint.setColor4f(GrColor4f(0, 0.25f, 1, 1));
this->visualizeAlphaMask(ctx, rtc, reducedClip, std::move(paint));
} else {
paint.setColor4f(GrColor4f(1, 0.25f, 0.25f, 1));
this->visualizeStencilMask(ctx, rtc, reducedClip, std::move(paint));
}
}
void WindowRectanglesMaskGM::visualizeAlphaMask(GrContext* ctx, GrRenderTargetContext* rtc,
const GrReducedClip& reducedClip, GrPaint&& paint) {
sk_sp<GrRenderTargetContext> maskRTC(
ctx->makeRenderTargetContextWithFallback(SkBackingFit::kExact, kLayerRect.width(),
kLayerRect.height(), kAlpha_8_GrPixelConfig,
nullptr));
if (!maskRTC ||
!ctx->resourceProvider()->attachStencilAttachment(maskRTC->accessRenderTarget())) {
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, GrColorPackA4(0xff), true);
maskRTC->priv().drawAndStencilRect(StencilOnlyClip(), &GrUserStencilSettings::kUnused,
SkRegion::kDifference_Op, false, GrAA::kNo, SkMatrix::I(),
SkRect::MakeIWH(maskRTC->width(), maskRTC->height()));
reducedClip.drawAlphaClipMask(maskRTC.get());
sk_sp<GrTexture> mask(maskRTC->asTexture());
int x = kCoverRect.x() - kLayerRect.x(),
y = kCoverRect.y() - kLayerRect.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(mask.get(), x, y);
rtc->drawRect(clip, std::move(paint), GrAA::kYes, SkMatrix::I(),
SkRect::Make(SkIRect::MakeXYWH(x, y, mask->width(), mask->height())));
}
void WindowRectanglesMaskGM::visualizeStencilMask(GrContext* ctx, GrRenderTargetContext* rtc,
const GrReducedClip& reducedClip,
GrPaint&& paint) {
if (!ctx->resourceProvider()->attachStencilAttachment(rtc->accessRenderTarget())) {
return;
}
// 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, {kLayerRect.x(), kLayerRect.y()});
// Now visualize the stencil mask by covering the entire render target. The regions inside
// window rectangless 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(StencilOnlyClip(), 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 < kLayerRect.height(); y += kMaskCheckerSize) {
for (int x = (y & 1) == flip ? 0 : kMaskCheckerSize;
x < kLayerRect.width(); x += 2 * kMaskCheckerSize) {
SkIRect checker = SkIRect::MakeXYWH(x, y, kMaskCheckerSize, kMaskCheckerSize);
rtc->priv().stencilRect(GrNoClip(), &kSetClip, GrAAType::kNone, SkMatrix::I(),
SkRect::Make(checker));
}
}
}
void WindowRectanglesMaskGM::fail(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextAlign(SkPaint::kCenter_Align);
paint.setTextSize(20);
sk_tool_utils::set_portable_typeface(&paint);
SkString errorMsg;
errorMsg.printf("Requires GPU with %i window rectangles", kNumWindows);
canvas->clipRect(SkRect::Make(kCoverRect));
canvas->clear(SK_ColorWHITE);
canvas->drawText(errorMsg.c_str(), errorMsg.size(), SkIntToScalar(kCoverRect.centerX()),
SkIntToScalar(kCoverRect.centerY() - 10), paint);
}
DEF_GM( return new WindowRectanglesMaskGM(); )
#endif
}