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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 "SkGradientShader.h"
#include "SkSurface.h"
#include "SkSurfaceProps.h"
#define W 200
#define H 100
static 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::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
}
static SkSurface* make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelGeometry geo,
int disallowAA, int disallowDither) {
uint32_t flags = 0;
if (disallowAA) {
flags |= SkSurfaceProps::kDisallowAntiAlias_Flag;
}
if (disallowDither) {
flags |= SkSurfaceProps::kDisallowDither_Flag;
}
SkSurfaceProps props(flags, geo);
if (ctx) {
return SkSurface::NewRenderTarget(ctx, info, 0, &props);
} else {
return SkSurface::NewRaster(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())->unref();
canvas->drawRect(SkRect::MakeWH(W, H), paint);
paint.setShader(NULL);
paint.setColor(SK_ColorWHITE);
paint.setTextSize(32);
paint.setTextAlign(SkPaint::kCenter_Align);
canvas->drawText(label, strlen(label), W / 2, H * 3 / 4, paint);
}
class SurfacePropsGM : public skiagm::GM {
public:
SurfacePropsGM() {}
protected:
SkString onShortName() SK_OVERRIDE {
return SkString("surfaceprops");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(W * 4, H * 5);
}
virtual void onDraw(SkCanvas* canvas) SK_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;
} rec[] = {
{ 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;
for (int disallowAA = 0; disallowAA <= 1; ++disallowAA) {
for (int disallowDither = 0; disallowDither <= 1; ++disallowDither) {
SkScalar y = 0;
for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
SkAutoTUnref<SkSurface> surface(make_surface(ctx, info, rec[i].fGeo,
disallowAA, disallowDither));
test_draw(surface->getCanvas(), rec[i].fLabel);
surface->draw(canvas, x, y, NULL);
y += H;
}
x += W;
}
}
}
private:
typedef GM INHERITED;
};
DEF_GM( return new SurfacePropsGM )
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