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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.h"
#include "sk_tool_utils.h"
#include "SkGradientShader.h"
#include "SkSurface.h"
#include "SkSurfaceProps.h"
#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, SkShader::kClamp_TileMode);
}
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.setLCDRenderText(true);
paint.setDither(true);
paint.setShader(make_shader());
canvas->drawRect(SkRect::MakeWH(W, H), paint);
paint.setShader(nullptr);
paint.setColor(SK_ColorWHITE);
paint.setTextSize(32);
paint.setTextAlign(SkPaint::kCenter_Align);
sk_tool_utils::set_portable_typeface(&paint);
canvas->drawString(label, W / 2, H * 3 / 4, paint);
}
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(canvas->makeSurface(info, nullptr));
if (!surf) {
surf = SkSurface::MakeRaster(info);
}
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 = canvas->makeSurface(info, nullptr);
if (!surf) {
surf = SkSurface::MakeRaster(info, nullptr);
}
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 = canvas->makeSurface(info, nullptr);
if (!surf) {
surf = SkSurface::MakeRaster(info, nullptr);
}
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.setAlpha(0x40);
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);
}
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