74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
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/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkImageFilter.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPixelRef.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/effects/SkImageFilters.h"
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#include "include/effects/SkRuntimeEffect.h"
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#include "include/utils/SkRandom.h"
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#include "src/effects/imagefilters/SkRuntimeImageFilter.h"
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#include "tools/ToolUtils.h"
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static sk_sp<SkImageFilter> make_filter() {
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sk_sp<SkRuntimeEffect> effect = SkRuntimeEffect::MakeForShader(SkString(R"(
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uniform shader input;
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half4 main(float2 coord) {
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coord.x += sin(coord.y / 3) * 4;
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return sample(input, coord);
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}
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)")).effect;
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return SkMakeRuntimeImageFilter(std::move(effect),
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/*uniforms=*/nullptr,
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/*input=*/nullptr);
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}
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DEF_SIMPLE_GM_BG(rtif_distort, canvas, 500, 750, SK_ColorBLACK) {
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SkRect clip = SkRect::MakeWH(250, 250);
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SkPaint filterPaint;
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filterPaint.setImageFilter(make_filter());
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auto draw_layer = [&](SkScalar tx, SkScalar ty, SkMatrix m) {
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canvas->save();
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canvas->translate(tx, ty);
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canvas->clipRect(clip);
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canvas->concat(m);
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canvas->saveLayer(nullptr, &filterPaint);
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const char* str = "The quick brown fox jumped over the lazy dog.";
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SkRandom rand;
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SkFont font(ToolUtils::create_portable_typeface());
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for (int i = 0; i < 25; ++i) {
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int x = rand.nextULessThan(500);
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int y = rand.nextULessThan(500);
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SkPaint paint;
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paint.setColor(ToolUtils::color_to_565(rand.nextBits(24) | 0xFF000000));
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font.setSize(rand.nextRangeScalar(0, 300));
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canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, paint);
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}
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canvas->restore();
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canvas->restore();
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};
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draw_layer( 0, 0, SkMatrix::I());
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draw_layer(250, 0, SkMatrix::Scale(0.5f, 0.5f));
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draw_layer( 0, 250, SkMatrix::RotateDeg(45, {125, 125}));
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draw_layer(250, 250, SkMatrix::Scale(0.5f, 0.5f) * SkMatrix::RotateDeg(45, {125, 125}));
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draw_layer( 0, 500, SkMatrix::Skew(-0.5f, 0));
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SkMatrix p = SkMatrix::I();
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p.setPerspX(0.0015f);
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p.setPerspY(-0.0015f);
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draw_layer(250, 500, p);
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}
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