skia2/gm/windowrectangles.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

303 lines
12 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/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/GrTextureProxy.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/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 (GrFSAAType::kNone == rtc->fsaaType()) {
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;
const GrBackendFormat format =
ctx->priv().caps()->getBackendFormatFromColorType(kAlpha_8_SkColorType);
sk_sp<GrRenderTargetContext> maskRTC(
ctx->priv().makeDeferredRenderTargetContextWithFallback(
format, SkBackingFit::kExact,
kCoverRect.width() + padRight,
kCoverRect.height() + padBottom,
kAlpha_8_GrPixelConfig, 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);
maskRTC->priv().drawAndStencilRect(make_stencil_only_clip(), &GrUserStencilSettings::kUnused,
SkRegion::kDifference_Op, false, 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);
rtc->priv().stencilRect(
GrNoClip(), &kSetClip, GrAA::kNo, SkMatrix::I(), SkRect::Make(checker));
}
}
}
DEF_GM( return new WindowRectanglesMaskGM(); )
}