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skia2/gm/pictureshader.cpp
Herb Derby c37b386886 Replace SK_ARRAY_COUNT with std::size() for skia/gm 
Note: in variedtext.cpp:66 changed static_assert to SkASSERT.

Change-Id: I853a2e5563c90c9dde5d6ba5443cc73b664b493d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/551876
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
2022-06-21 18:09:30 +00:00

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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/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPicture.h"
#include "include/core/SkPictureRecorder.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/SkTextBlob.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypes.h"
#include "tools/ToolUtils.h"
static struct {
SkTileMode tmx;
SkTileMode tmy;
} kTileConfigs[] = {
{ SkTileMode::kRepeat, SkTileMode::kRepeat },
{ SkTileMode::kRepeat, SkTileMode::kClamp },
{ SkTileMode::kMirror, SkTileMode::kRepeat },
};
class PictureShaderGM : public skiagm::GM {
public:
PictureShaderGM(SkScalar tileSize, SkScalar sceneSize, bool useLocalMatrixWrapper = false,
float alpha = 1)
: fTileSize(tileSize)
, fSceneSize(sceneSize)
, fAlpha(alpha)
, fUseLocalMatrixWrapper(useLocalMatrixWrapper)
{}
protected:
void onOnceBeforeDraw() override {
// Build the picture.
SkPictureRecorder recorder;
SkCanvas* pictureCanvas = recorder.beginRecording(fTileSize, fTileSize);
this->drawTile(pictureCanvas);
fPicture = recorder.finishRecordingAsPicture();
// Build a reference bitmap.
fBitmap.allocN32Pixels(SkScalarCeilToInt(fTileSize), SkScalarCeilToInt(fTileSize));
fBitmap.eraseColor(SK_ColorTRANSPARENT);
SkCanvas bitmapCanvas(fBitmap);
this->drawTile(&bitmapCanvas);
}
SkString onShortName() override {
return SkStringPrintf("pictureshader%s%s",
fUseLocalMatrixWrapper ? "_localwrapper" : "",
fAlpha < 1 ? "_alpha" : "");
}
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 < std::size(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);
paint.setAlphaf(fAlpha);
auto pictureShader = fPicture->makeShader(kTileConfigs[tileMode].tmx,
kTileConfigs[tileMode].tmy,
SkFilterMode::kNearest,
fUseLocalMatrixWrapper ? nullptr : &localMatrix,
nullptr);
paint.setShader(fUseLocalMatrixWrapper
? pictureShader->makeWithLocalMatrix(localMatrix)
: pictureShader);
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->translate(fSceneSize * 1.1f, 0);
auto bitmapShader = fBitmap.makeShader(kTileConfigs[tileMode].tmx,
kTileConfigs[tileMode].tmy,
SkSamplingOptions(),
fUseLocalMatrixWrapper ? nullptr : &localMatrix);
paint.setShader(fUseLocalMatrixWrapper
? bitmapShader->makeWithLocalMatrix(localMatrix)
: bitmapShader);
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->restore();
}
const SkScalar fTileSize;
const SkScalar fSceneSize;
const float fAlpha;
const bool fUseLocalMatrixWrapper;
sk_sp<SkPicture> fPicture;
SkBitmap fBitmap;
using INHERITED = GM;
};
DEF_GM(return new PictureShaderGM(50, 100);)
DEF_GM(return new PictureShaderGM(50, 100, true);)
DEF_GM(return new PictureShaderGM(50, 100, false, 0.25f);)
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(ToolUtils::color_to_565(0xFF303F9F)); // dark blue
c->drawRect(r, p);
p.setColor(ToolUtils::color_to_565(0xFFC5CAE9)); // light blue
p.setStrokeWidth(10);
c->drawLine(20, 20, 80, 80, p);
sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture());
p.setColor(ToolUtils::color_to_565(0xFF8BC34A)); // green
canvas->drawPaint(p);
canvas->clipRect(SkRect::MakeXYWH(0, 0, 400, 350));
p.setColor(0xFFB6B6B6); // gray
canvas->drawPaint(p);
p.setShader(picture->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
SkFilterMode::kNearest));
canvas->drawPaint(p);
}
DEF_SIMPLE_GM(pictureshader_persp, canvas, 215, 110) {
enum class DrawStrategy {
kDirect,
kPictureShader,
};
auto drawPicture = [](SkCanvas* canvas, sk_sp<SkPicture> picture, DrawStrategy strategy) {
// Only want local upper 50x50 of 'picture' before we apply decal (or clip)
SkRect bounds = {0.f, 0.f, 50.f, 50.f};
switch(strategy) {
case DrawStrategy::kDirect: {
canvas->clipRect(bounds, true);
canvas->drawPicture(picture);
break; }
case DrawStrategy::kPictureShader: {
SkPaint paint;
paint.setShader(picture->makeShader(SkTileMode::kDecal, SkTileMode::kDecal,
SkFilterMode::kLinear, nullptr, &bounds));
canvas->drawRect({0.f, 0.f, 50.f, 50.f}, paint);
break; }
}
};
auto picture = []() {
sk_sp<SkTypeface> typeface = SkTypeface::MakeDefault();
if (!typeface) {
typeface = SkTypeface::MakeFromName("monospace", SkFontStyle());
}
SkFont font;
font.setTypeface(typeface);
font.setHinting(SkFontHinting::kNormal);
font.setSize(8.f);
SkPaint paint;
paint.setColor(SK_ColorGREEN);
SkPictureRecorder recorder;
SkCanvas* record_canvas = recorder.beginRecording({0, 0, 100, 100});
record_canvas->drawTextBlob(SkTextBlob::MakeFromString("Hamburgefons", font),
0, 16.f, paint);
return recorder.finishRecordingAsPicture();
}();
SkM44 m;
m.preScale(2.f, 2.f);
SkM44 persp = SkM44::Perspective(0.01f, 10.f, SK_ScalarPI / 3.f);
persp.preTranslate(0.f, 5.f, -0.1f);
persp.preConcat(SkM44::Rotate({0.f, 1.f, 0.f}, 0.008f));
m.postConcat(persp);
canvas->clear(SK_ColorBLACK);
canvas->translate(5.f, 5.f);
for (auto strategy : { DrawStrategy::kDirect,
DrawStrategy::kPictureShader }) {
canvas->save();
SkPaint outline;
outline.setColor(SK_ColorWHITE);
outline.setStyle(SkPaint::kStroke_Style);
outline.setStrokeWidth(1.f);
canvas->drawRect({-1, -1, 101, 101}, outline);
canvas->clipRect({0, 0, 100, 100});
canvas->concat(m);
drawPicture(canvas, picture, strategy);
canvas->restore();
canvas->translate(105.f, 0.f);
}
}
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