blob: 5b335b26bb6dd7276367b971c1e90eee4aaf1fb1 [file] [log] [blame]
/*
* Copyright 2012 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/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPixelRef.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkRuntimeEffect.h"
#include "src/base/SkRandom.h"
#include "tools/DecodeUtils.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
#include <string_view>
static sk_sp<SkImageFilter> make_filter() {
sk_sp<SkRuntimeEffect> effect = SkRuntimeEffect::MakeForShader(SkString(R"(
uniform shader child;
half4 main(float2 coord) {
coord.x += sin(coord.y / 3) * 4;
return child.eval(coord);
}
)")).effect;
SkRuntimeShaderBuilder builder(std::move(effect));
return SkImageFilters::RuntimeShader(builder,
/*sampleRadius=*/4,
/*childShaderName=*/"",
/*input=*/nullptr);
}
DEF_SIMPLE_GM_BG(rtif_distort, canvas, 500, 750, SK_ColorBLACK) {
SkRect clip = SkRect::MakeWH(250, 250);
SkPaint filterPaint;
filterPaint.setImageFilter(make_filter());
auto draw_layer = [&](SkScalar tx, SkScalar ty, SkMatrix m) {
canvas->save();
canvas->translate(tx, ty);
canvas->clipRect(clip);
canvas->concat(m);
canvas->saveLayer(nullptr, &filterPaint);
const char* str = "The quick brown fox jumped over the lazy dog.";
SkRandom rand;
SkFont font = ToolUtils::DefaultPortableFont();
for (int i = 0; i < 25; ++i) {
int x = rand.nextULessThan(500);
int y = rand.nextULessThan(500);
SkPaint paint;
paint.setColor(ToolUtils::color_to_565(rand.nextBits(24) | 0xFF000000));
font.setSize(rand.nextRangeScalar(0, 300));
canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, paint);
}
canvas->restore();
canvas->restore();
};
draw_layer( 0, 0, SkMatrix::I());
draw_layer(250, 0, SkMatrix::Scale(0.5f, 0.5f));
draw_layer( 0, 250, SkMatrix::RotateDeg(45, {125, 125}));
draw_layer(250, 250, SkMatrix::Scale(0.5f, 0.5f) * SkMatrix::RotateDeg(45, {125, 125}));
draw_layer( 0, 500, SkMatrix::Skew(-0.5f, 0));
SkMatrix p = SkMatrix::I();
p.setPerspX(0.0015f);
p.setPerspY(-0.0015f);
draw_layer(250, 500, p);
}
DEF_SIMPLE_GM(rtif_unsharp, canvas, 512, 256) {
// Similar to "unsharp_rt", which does the entire unsharp filter in a single shader. This uses
// the image filter DAG to compute the blurred version, then does the weighted subtraction.
sk_sp<SkRuntimeEffect> effect = SkRuntimeEffect::MakeForShader(SkString(R"(
uniform shader content;
uniform shader blurred;
vec4 main(vec2 coord) {
vec4 c = content.eval(coord);
vec4 b = blurred.eval(coord);
return c + (c - b) * 4;
}
)")).effect;
SkRuntimeShaderBuilder builder(std::move(effect));
auto image = ToolUtils::GetResourceAsImage("images/mandrill_256.png");
auto blurredSrc = SkImageFilters::Blur(1, 1, /*input=*/nullptr);
std::string_view childNames[] = { "content", "blurred" };
sk_sp<SkImageFilter> childNodes[] = { nullptr, blurredSrc };
auto sharpened = SkImageFilters::RuntimeShader(builder, childNames, childNodes, 2);
canvas->drawImage(image, 0, 0);
canvas->translate(256, 0);
SkPaint paint;
paint.setImageFilter(sharpened);
canvas->saveLayer({ 0, 0, 256, 256 }, &paint);
canvas->drawImage(image, 0, 0);
canvas->restore();
}