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- /*
- * Copyright 2014 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/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkColorSpace.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkSurfaceProps.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypeface.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/utils/SkTextUtils.h"
- #include "tools/ToolUtils.h"
- class GrContext;
- #define W 200
- #define H 100
- static sk_sp<SkShader> make_shader() {
- int a = 0x99;
- int b = 0xBB;
- SkPoint pts[] = { { 0, 0 }, { W, H } };
- SkColor colors[] = { SkColorSetRGB(a, a, a), SkColorSetRGB(b, b, b) };
- return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp);
- }
- static sk_sp<SkSurface> make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelGeometry geo) {
- SkSurfaceProps props(0, geo);
- if (ctx) {
- return SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info, 0, &props);
- } else {
- return SkSurface::MakeRaster(info, &props);
- }
- }
- static void test_draw(SkCanvas* canvas, const char label[]) {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setDither(true);
- paint.setShader(make_shader());
- canvas->drawRect(SkRect::MakeWH(W, H), paint);
- paint.setShader(nullptr);
- paint.setColor(SK_ColorWHITE);
- SkFont font(ToolUtils::create_portable_typeface(), 32);
- font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
- SkTextUtils::DrawString(canvas, label, W / 2, H * 3 / 4, font, paint,
- SkTextUtils::kCenter_Align);
- }
- class SurfacePropsGM : public skiagm::GM {
- public:
- SurfacePropsGM() {}
- protected:
- SkString onShortName() override {
- return SkString("surfaceprops");
- }
- SkISize onISize() override {
- return SkISize::Make(W, H * 5);
- }
- void onDraw(SkCanvas* canvas) override {
- GrContext* ctx = canvas->getGrContext();
- // must be opaque to have a hope of testing LCD text
- const SkImageInfo info = SkImageInfo::MakeN32(W, H, kOpaque_SkAlphaType);
- const struct {
- SkPixelGeometry fGeo;
- const char* fLabel;
- } recs[] = {
- { kUnknown_SkPixelGeometry, "Unknown" },
- { kRGB_H_SkPixelGeometry, "RGB_H" },
- { kBGR_H_SkPixelGeometry, "BGR_H" },
- { kRGB_V_SkPixelGeometry, "RGB_V" },
- { kBGR_V_SkPixelGeometry, "BGR_V" },
- };
- SkScalar x = 0;
- SkScalar y = 0;
- for (const auto& rec : recs) {
- auto surface(make_surface(ctx, info, rec.fGeo));
- if (!surface) {
- SkDebugf("failed to create surface! label: %s", rec.fLabel);
- continue;
- }
- test_draw(surface->getCanvas(), rec.fLabel);
- surface->draw(canvas, x, y, nullptr);
- y += H;
- }
- }
- private:
- typedef GM INHERITED;
- };
- DEF_GM( return new SurfacePropsGM )
- #ifdef SK_DEBUG
- static bool equal(const SkSurfaceProps& a, const SkSurfaceProps& b) {
- return a.flags() == b.flags() && a.pixelGeometry() == b.pixelGeometry();
- }
- #endif
- class NewSurfaceGM : public skiagm::GM {
- public:
- NewSurfaceGM() {}
- protected:
- SkString onShortName() override {
- return SkString("surfacenew");
- }
- SkISize onISize() override {
- return SkISize::Make(300, 140);
- }
- static void drawInto(SkCanvas* canvas) {
- canvas->drawColor(SK_ColorRED);
- }
- void onDraw(SkCanvas* canvas) override {
- SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
- auto surf(ToolUtils::makeSurface(canvas, info, nullptr));
- drawInto(surf->getCanvas());
- sk_sp<SkImage> image(surf->makeImageSnapshot());
- canvas->drawImage(image, 10, 10, nullptr);
- auto surf2(surf->makeSurface(info));
- drawInto(surf2->getCanvas());
- // Assert that the props were communicated transitively through the first image
- SkASSERT(equal(surf->props(), surf2->props()));
- sk_sp<SkImage> image2(surf2->makeImageSnapshot());
- canvas->drawImage(image2.get(), 10 + SkIntToScalar(image->width()) + 10, 10, nullptr);
- }
- private:
- typedef GM INHERITED;
- };
- DEF_GM( return new NewSurfaceGM )
- ///////////////////////////////////////////////////////////////////////////////////////////////////
- DEF_SIMPLE_GM(copy_on_write_retain, canvas, 256, 256) {
- const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
- sk_sp<SkSurface> surf = ToolUtils::makeSurface(canvas, info);
- surf->getCanvas()->clear(SK_ColorRED);
- // its important that image survives longer than the next draw, so the surface will see
- // an outstanding image, and have to decide if it should retain or discard those pixels
- sk_sp<SkImage> image = surf->makeImageSnapshot();
- // normally a clear+opaque should trigger the discard optimization, but since we have a clip
- // it should not (we need the previous red pixels).
- surf->getCanvas()->clipRect(SkRect::MakeWH(128, 256));
- surf->getCanvas()->clear(SK_ColorBLUE);
- // expect to see two rects: blue | red
- canvas->drawImage(surf->makeImageSnapshot(), 0, 0, nullptr);
- }
- DEF_SIMPLE_GM(copy_on_write_savelayer, canvas, 256, 256) {
- const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
- sk_sp<SkSurface> surf = ToolUtils::makeSurface(canvas, info);
- surf->getCanvas()->clear(SK_ColorRED);
- // its important that image survives longer than the next draw, so the surface will see
- // an outstanding image, and have to decide if it should retain or discard those pixels
- sk_sp<SkImage> image = surf->makeImageSnapshot();
- // now draw into a full-screen layer. This should (a) trigger a copy-on-write, but it should
- // not trigger discard, even tho its alpha (SK_ColorBLUE) is opaque, since it is in a layer
- // with a non-opaque paint.
- SkPaint paint;
- paint.setAlphaf(0.25f);
- surf->getCanvas()->saveLayer({0, 0, 256, 256}, &paint);
- surf->getCanvas()->clear(SK_ColorBLUE);
- surf->getCanvas()->restore();
- // expect to see two rects: blue blended on red
- canvas->drawImage(surf->makeImageSnapshot(), 0, 0, nullptr);
- }
- DEF_SIMPLE_GM(surface_underdraw, canvas, 256, 256) {
- SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256, nullptr);
- auto surf = ToolUtils::makeSurface(canvas, info);
- const SkIRect subset = SkIRect::MakeLTRB(180, 0, 256, 256);
- // noisy background
- {
- SkPoint pts[] = {{0, 0}, {40, 50}};
- SkColor colors[] = {SK_ColorRED, SK_ColorBLUE};
- auto sh = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kRepeat);
- SkPaint paint;
- paint.setShader(sh);
- surf->getCanvas()->drawPaint(paint);
- }
- // save away the right-hand strip, then clear it
- sk_sp<SkImage> saveImg = surf->makeImageSnapshot(subset);
- {
- SkPaint paint;
- paint.setBlendMode(SkBlendMode::kClear);
- surf->getCanvas()->drawRect(SkRect::Make(subset), paint);
- }
- // draw the "foreground"
- {
- SkPaint paint;
- paint.setColor(SK_ColorGREEN);
- SkRect r = { 0, 10, 256, 35 };
- while (r.fBottom < 256) {
- surf->getCanvas()->drawRect(r, paint);
- r.offset(0, r.height() * 2);
- }
- }
- // apply the "fade"
- {
- SkPoint pts[] = {{SkIntToScalar(subset.left()), 0}, {SkIntToScalar(subset.right()), 0}};
- SkColor colors[] = {0xFF000000, 0};
- auto sh = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp);
- SkPaint paint;
- paint.setShader(sh);
- paint.setBlendMode(SkBlendMode::kDstIn);
- surf->getCanvas()->drawRect(SkRect::Make(subset), paint);
- }
- // restore the original strip, drawing it "under" the current foreground
- {
- SkPaint paint;
- paint.setBlendMode(SkBlendMode::kDstOver);
- surf->getCanvas()->drawImage(saveImg,
- SkIntToScalar(subset.left()), SkIntToScalar(subset.top()),
- &paint);
- }
- // show it on screen
- surf->draw(canvas, 0, 0, nullptr);
- }
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