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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 "SkBitmap.h"
#include "SkPaint.h"
#include "SkPicture.h"
#include "SkPictureRecorder.h"
#include "SkShader.h"
static struct {
SkShader::TileMode tmx;
SkShader::TileMode tmy;
} kTileConfigs[] = {
{ SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode },
{ SkShader::kRepeat_TileMode, SkShader::kClamp_TileMode },
{ SkShader::kMirror_TileMode, SkShader::kRepeat_TileMode },
};
class PictureShaderGM : public skiagm::GM {
public:
PictureShaderGM(SkScalar tileSize, SkScalar sceneSize)
: fTileSize(tileSize)
, fSceneSize(sceneSize) {
}
protected:
void onOnceBeforeDraw() override {
// Build the picture.
SkPictureRecorder recorder;
SkCanvas* pictureCanvas = recorder.beginRecording(fTileSize, fTileSize, NULL, 0);
this->drawTile(pictureCanvas);
fPicture.reset(recorder.endRecording());
// Build a reference bitmap.
fBitmap.allocN32Pixels(SkScalarCeilToInt(fTileSize), SkScalarCeilToInt(fTileSize));
fBitmap.eraseColor(SK_ColorTRANSPARENT);
SkCanvas bitmapCanvas(fBitmap);
this->drawTile(&bitmapCanvas);
}
SkString onShortName() override {
return SkString("pictureshader");
}
SkISize onISize() override {
return SkISize::Make(1400, 1450);
}
void onDraw(SkCanvas* canvas) override {
this->drawSceneColumn(canvas, SkPoint::Make(0, 0), 1, 1, 0);
this->drawSceneColumn(canvas, SkPoint::Make(0, fSceneSize * 6.4f), 1, 2, 0);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, 0), 1, 1, 1);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, fSceneSize * 6.4f), 1, 1, 2);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 4.8f, 0), 2, 1, 0);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 9.6f, 0), 2, 2, 0);
// One last custom row to exercise negative scaling
SkMatrix ctm, localMatrix;
ctm.setTranslate(fSceneSize * 2.1f, fSceneSize * 13.8f);
ctm.preScale(-1, -1);
localMatrix.setScale(2, 2);
this->drawScene(canvas, ctm, localMatrix, 0);
ctm.setTranslate(fSceneSize * 2.4f, fSceneSize * 12.8f);
localMatrix.setScale(-1, -1);
this->drawScene(canvas, ctm, localMatrix, 0);
ctm.setTranslate(fSceneSize * 4.8f, fSceneSize * 12.3f);
ctm.preScale(2, 2);
this->drawScene(canvas, ctm, localMatrix, 0);
ctm.setTranslate(fSceneSize * 13.8f, fSceneSize * 14.3f);
ctm.preScale(-2, -2);
localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
localMatrix.preRotate(45);
localMatrix.preScale(-2, -2);
this->drawScene(canvas, ctm, localMatrix, 0);
}
private:
void drawSceneColumn(SkCanvas* canvas, const SkPoint& pos, SkScalar scale, SkScalar localScale,
unsigned tileMode) {
SkMatrix ctm, localMatrix;
ctm.setTranslate(pos.x(), pos.y());
ctm.preScale(scale, scale);
localMatrix.setScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 1.2f * scale);
ctm.preScale(scale, scale);
localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 2.4f * scale);
ctm.preScale(scale, scale);
localMatrix.setRotate(45);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 3.6f * scale);
ctm.preScale(scale, scale);
localMatrix.setSkew(1, 0);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 4.8f * scale);
ctm.preScale(scale, scale);
localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
localMatrix.preRotate(45);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
}
void drawTile(SkCanvas* canvas) {
SkPaint paint;
paint.setColor(SK_ColorGREEN);
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
canvas->drawCircle(fTileSize / 4, fTileSize / 4, fTileSize / 4, paint);
canvas->drawRect(SkRect::MakeXYWH(fTileSize / 2, fTileSize / 2,
fTileSize / 2, fTileSize / 2), paint);
paint.setColor(SK_ColorRED);
canvas->drawLine(fTileSize / 2, fTileSize * 1 / 3,
fTileSize / 2, fTileSize * 2 / 3, paint);
canvas->drawLine(fTileSize * 1 / 3, fTileSize / 2,
fTileSize * 2 / 3, fTileSize / 2, paint);
}
void drawScene(SkCanvas* canvas, const SkMatrix& matrix, const SkMatrix& localMatrix,
unsigned tileMode) {
SkASSERT(tileMode < SK_ARRAY_COUNT(kTileConfigs));
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(SK_ColorLTGRAY);
canvas->save();
canvas->concat(matrix);
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->drawRect(SkRect::MakeXYWH(fSceneSize * 1.1f, 0, fSceneSize, fSceneSize), paint);
SkAutoTUnref<SkShader> pictureShader(SkShader::CreatePictureShader(
fPicture,
kTileConfigs[tileMode].tmx,
kTileConfigs[tileMode].tmy,
&localMatrix,
NULL));
paint.setShader(pictureShader.get());
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->translate(fSceneSize * 1.1f, 0);
SkAutoTUnref<SkShader> bitmapShader(SkShader::CreateBitmapShader(
fBitmap,
kTileConfigs[tileMode].tmx,
kTileConfigs[tileMode].tmy,
&localMatrix));
paint.setShader(bitmapShader.get());
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->restore();
}
SkScalar fTileSize;
SkScalar fSceneSize;
SkAutoTUnref<SkPicture> fPicture;
SkBitmap fBitmap;
typedef GM INHERITED;
};
DEF_GM( return SkNEW_ARGS(PictureShaderGM, (50, 100)); )
DEF_SIMPLE_GM(tiled_picture_shader, canvas, 400, 400) {
// https://code.google.com/p/skia/issues/detail?id=3398
SkRect tile = SkRect::MakeWH(100, 100);
SkPictureRecorder recorder;
SkCanvas* c = recorder.beginRecording(tile);
SkRect r = tile;
r.inset(4, 4);
SkPaint p;
p.setColor(0xFF303F9F); // dark blue
c->drawRect(r, p);
p.setColor(0xFFC5CAE9); // light blue
p.setStrokeWidth(10);
c->drawLine(20, 20, 80, 80, p);
SkAutoTUnref<SkPicture> picture(recorder.endRecording());
SkAutoTUnref<SkShader> shader(SkShader::CreatePictureShader(
picture.get(),
SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode,
NULL,
NULL));
p.setColor(0xFF8BC34A); // green
canvas->drawPaint(p);
canvas->clipRect(SkRect::MakeXYWH(0, 0, 400, 350));
p.setColor(0xFFB6B6B6); // gray
canvas->drawPaint(p);
p.setShader(shader.get());
canvas->drawPaint(p);
}
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