/*
* Copyright 2011 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 "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
static void make_bitmap(SkBitmap* bitmap) {
bitmap->allocN32Pixels(64, 64);
SkCanvas canvas(*bitmap);
canvas.drawColor(SK_ColorRED);
SkPaint paint;
paint.setAntiAlias(true);
const SkPoint pts[] = { { 0, 0 }, { 64, 64 } };
const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE };
paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
SkShader::kClamp_TileMode));
canvas.drawCircle(32, 32, 32, paint);
}
class DrawBitmapRect2 : public skiagm::GM {
bool fUseIRect;
public:
DrawBitmapRect2(bool useIRect) : fUseIRect(useIRect) {
}
protected:
SkString onShortName() override {
SkString str;
str.printf("bitmaprect_%s", fUseIRect ? "i" : "s");
return str;
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(sk_tool_utils::color_to_565(0xFFCCCCCC));
const SkIRect src[] = {
{ 0, 0, 32, 32 },
{ 0, 0, 80, 80 },
{ 32, 32, 96, 96 },
{ -32, -32, 32, 32, }
};
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
SkBitmap bitmap;
make_bitmap(&bitmap);
SkRect dstR = { 0, 200, 128, 380 };
canvas->translate(16, 40);
for (size_t i = 0; i < SK_ARRAY_COUNT(src); i++) {
SkRect srcR;
srcR.set(src[i]);
canvas->drawBitmap(bitmap, 0, 0, &paint);
if (!fUseIRect) {
canvas->drawBitmapRect(bitmap, srcR, dstR, &paint,
SkCanvas::kStrict_SrcRectConstraint);
} else {
canvas->drawBitmapRect(bitmap, src[i], dstR, &paint);
}
canvas->drawRect(dstR, paint);
canvas->drawRect(srcR, paint);
canvas->translate(160, 0);
}
}
private:
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static void make_3x3_bitmap(SkBitmap* bitmap) {
const int xSize = 3;
const int ySize = 3;
const SkColor textureData[xSize][ySize] = {
{ SK_ColorRED, SK_ColorWHITE, SK_ColorBLUE },
{ SK_ColorGREEN, SK_ColorBLACK, SK_ColorCYAN },
{ SK_ColorYELLOW, SK_ColorGRAY, SK_ColorMAGENTA }
};
bitmap->allocN32Pixels(xSize, ySize, true);
SkCanvas canvas(*bitmap);
SkPaint paint;
for (int y = 0; y < ySize; y++) {
for (int x = 0; x < xSize; x++) {
paint.setColor(textureData[x][y]);
canvas.drawIRect(SkIRect::MakeXYWH(x, y, 1, 1), paint);
}
}
}
// This GM attempts to make visible any issues drawBitmapRect may have
// with partial source rects. In this case the eight pixels on the border
// should be half the width/height of the central pixel, i.e.:
// __|____|__
// | |
// __|____|__
// | |
class DrawBitmapRect3 : public skiagm::GM {
public:
DrawBitmapRect3() {
this->setBGColor(SK_ColorBLACK);
}
protected:
SkString onShortName() override {
SkString str;
str.printf("3x3bitmaprect");
return str;
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onDraw(SkCanvas* canvas) override {
SkBitmap bitmap;
make_3x3_bitmap(&bitmap);
SkRect srcR = { 0.5f, 0.5f, 2.5f, 2.5f };
SkRect dstR = { 100, 100, 300, 200 };
canvas->drawBitmapRect(bitmap, srcR, dstR, nullptr, SkCanvas::kStrict_SrcRectConstraint);
}
private:
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static void make_big_bitmap(SkBitmap* bitmap) {
constexpr int gXSize = 4096;
constexpr int gYSize = 4096;
constexpr int gBorderWidth = 10;
bitmap->allocN32Pixels(gXSize, gYSize);
for (int y = 0; y < gYSize; ++y) {
for (int x = 0; x < gXSize; ++x) {
if (x <= gBorderWidth || x >= gXSize-gBorderWidth ||
y <= gBorderWidth || y >= gYSize-gBorderWidth) {
*bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FFFFFF);
} else {
*bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FF0000);
}
}
}
}
// This GM attempts to reveal any issues we may have when the GPU has to
// break up a large texture in order to draw it. The XOR transfer mode will
// create stripes in the image if there is imprecision in the destination
// tile placement.
class DrawBitmapRect4 : public skiagm::GM {
bool fUseIRect;
SkBitmap fBigBitmap;
public:
DrawBitmapRect4(bool useIRect) : fUseIRect(useIRect) {
this->setBGColor(0x88444444);
}
protected:
SkString onShortName() override {
SkString str;
str.printf("bigbitmaprect_%s", fUseIRect ? "i" : "s");
return str;
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onOnceBeforeDraw() override {
make_big_bitmap(&fBigBitmap);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAlpha(128);
paint.setBlendMode(SkBlendMode::kXor);
SkRect srcR1 = { 0.0f, 0.0f, 4096.0f, 2040.0f };
SkRect dstR1 = { 10.1f, 10.1f, 629.9f, 400.9f };
SkRect srcR2 = { 4085.0f, 10.0f, 4087.0f, 12.0f };
SkRect dstR2 = { 10, 410, 30, 430 };
if (!fUseIRect) {
canvas->drawBitmapRect(fBigBitmap, srcR1, dstR1, &paint,
SkCanvas::kStrict_SrcRectConstraint);
canvas->drawBitmapRect(fBigBitmap, srcR2, dstR2, &paint,
SkCanvas::kStrict_SrcRectConstraint);
} else {
canvas->drawBitmapRect(fBigBitmap, srcR1.roundOut(), dstR1, &paint);
canvas->drawBitmapRect(fBigBitmap, srcR2.roundOut(), dstR2, &paint);
}
}
private:
typedef skiagm::GM INHERITED;
};
class BitmapRectRounding : public skiagm::GM {
SkBitmap fBM;
public:
BitmapRectRounding() {}
protected:
SkString onShortName() override {
SkString str;
str.printf("bitmaprect_rounding");
return str;
}
SkISize onISize() override {
return SkISize::Make(640, 480);
}
void onOnceBeforeDraw() override {
fBM.allocN32Pixels(10, 10);
fBM.eraseColor(SK_ColorBLUE);
}
// This choice of coordinates and matrix land the bottom edge of the clip (and bitmap dst)
// at exactly 1/2 pixel boundary. However, drawBitmapRect may lose precision along the way.
// If it does, we may see a red-line at the bottom, instead of the bitmap exactly matching
// the clip (in which case we should see all blue).
// The correct image should be all blue.
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setColor(SK_ColorRED);
const SkRect r = SkRect::MakeXYWH(1, 1, 110, 114);
canvas->scale(0.9f, 0.9f);
// the drawRect shows the same problem as clipRect(r) followed by drawcolor(red)
canvas->drawRect(r, paint);
canvas->drawBitmapRect(fBM, r, nullptr);
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new BitmapRectRounding; )
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new DrawBitmapRect2(false); )
DEF_GM( return new DrawBitmapRect2(true); )
DEF_GM( return new DrawBitmapRect3(); )
#ifndef SK_BUILD_FOR_ANDROID
DEF_GM( return new DrawBitmapRect4(false); )
DEF_GM( return new DrawBitmapRect4(true); )
#endif