0612b52174
This new image filter constructor enables SkRuntimeEffects to be
used as shaders within the ImageFilter DAG. The shader is created
lazily using the SkRuntimeShaderBuilder enabling the resulting
shader to consume the previous stage of the ImageFilter graph.
This relands commit ad9d774c1f after
fixing the threading issue found by the TSAN bot.
Change-Id: I06dc4cf6a304b14804c55531a5bc3f2afa34e219
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/477156
Auto-Submit: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/*
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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 child;
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half4 main(float2 coord) {
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coord.x += sin(coord.y / 3) * 4;
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return child.eval(coord);
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}
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)")).effect;
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SkRuntimeShaderBuilder builder(std::move(effect));
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return SkImageFilters::RuntimeShader(builder, /*childShaderName=*/nullptr, /*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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