blob: ee08d063d1ad2144e84be25bd986e7899c6bffa0 [file] [log] [blame]
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkShader.h"
#include "include/core/SkSurface.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkRuntimeEffect.h"
#include "src/effects/imagefilters/SkRuntimeImageFilter.h"
#include "tests/Test.h"
static void test_unscaled(skiatest::Reporter* reporter) {
static const int kWidth = 10;
static const int kHeight = 10;
SkIRect ir = SkIRect::MakeWH(kWidth, kHeight);
SkBitmap filterResult, paintResult;
filterResult.allocN32Pixels(kWidth, kHeight);
SkCanvas canvasFilter(filterResult);
canvasFilter.clear(0x00000000);
paintResult.allocN32Pixels(kWidth, kHeight);
SkCanvas canvasPaint(paintResult);
canvasPaint.clear(0x00000000);
SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5));
SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN};
SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
SkScalar radius = SkIntToScalar(5);
sk_sp<SkShader> gradient = SkGradientShader::MakeRadial(
center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkTileMode::kClamp);
// Test using the image filter
{
SkPaint paint;
paint.setImageFilter(SkImageFilters::Shader(gradient, &ir));
canvasFilter.drawRect(SkRect::Make(ir), paint);
}
// Test using the paint directly
{
SkPaint paint;
paint.setShader(gradient);
canvasPaint.drawRect(SkRect::Make(ir), paint);
}
// Assert that both paths yielded the same result
for (int y = 0; y < kHeight; ++y) {
const SkPMColor* filterPtr = filterResult.getAddr32(0, y);
const SkPMColor* paintPtr = paintResult.getAddr32(0, y);
for (int x = 0; x < kWidth; ++x, ++filterPtr, ++paintPtr) {
REPORTER_ASSERT(reporter, *filterPtr == *paintPtr);
}
}
}
static void test_scaled(skiatest::Reporter* reporter) {
static const int kWidth = 10;
static const int kHeight = 10;
SkIRect ir = SkIRect::MakeWH(kWidth, kHeight);
SkBitmap filterResult, paintResult;
filterResult.allocN32Pixels(kWidth, kHeight);
SkCanvas canvasFilter(filterResult);
canvasFilter.clear(0x00000000);
paintResult.allocN32Pixels(kWidth, kHeight);
SkCanvas canvasPaint(paintResult);
canvasPaint.clear(0x00000000);
SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5));
SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN};
SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
SkScalar radius = SkIntToScalar(5);
sk_sp<SkShader> gradient = SkGradientShader::MakeRadial(
center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkTileMode::kClamp);
// Test using the image filter
{
SkPaint paint;
paint.setImageFilter(SkImageFilters::Shader(gradient, &ir));
canvasFilter.scale(SkIntToScalar(2), SkIntToScalar(2));
canvasFilter.drawRect(SkRect::Make(ir), paint);
}
// Test using the paint directly
{
SkPaint paint;
paint.setShader(gradient);
canvasPaint.scale(SkIntToScalar(2), SkIntToScalar(2));
canvasPaint.drawRect(SkRect::Make(ir), paint);
}
// Assert that both paths yielded the same result
for (int y = 0; y < kHeight; ++y) {
const SkPMColor* filterPtr = filterResult.getAddr32(0, y);
const SkPMColor* paintPtr = paintResult.getAddr32(0, y);
for (int x = 0; x < kWidth; ++x, ++filterPtr, ++paintPtr) {
REPORTER_ASSERT(reporter, *filterPtr == *paintPtr);
}
}
}
DEF_TEST(PaintImageFilter, reporter) {
test_unscaled(reporter);
test_scaled(reporter);
}
static void test_runtime_shader(skiatest::Reporter* r, SkSurface* surface) {
sk_sp<SkRuntimeEffect> effect = SkRuntimeEffect::MakeForShader(SkString(R"(
uniform shader child;
vec4 main(vec2 coord) {
return child.eval(coord) * 0.5;
}
)"))
.effect;
SkRuntimeShaderBuilder builder(effect);
// create a red image filter to feed as input into the SkImageFilters::RuntimeShader
SkPaint redPaint;
redPaint.setColor(SK_ColorRED);
sk_sp<SkImageFilter> input = SkImageFilters::Paint(redPaint);
// Create the different variations of SkImageFilters::RuntimeShader
// All 3 variations should produce the same pixel output
std::vector<sk_sp<SkImageFilter>> filters = {
SkMakeRuntimeImageFilter(effect, /*uniforms=*/nullptr, input),
SkImageFilters::RuntimeShader(builder, /*childShaderName=*/nullptr, input),
SkImageFilters::RuntimeShader(builder, /*childShaderName=*/"child", input)};
for (auto&& filter : filters) {
auto canvas = surface->getCanvas();
// clear to transparent
SkPaint paint;
paint.setColor(SK_ColorTRANSPARENT);
paint.setBlendMode(SkBlendMode::kSrc);
canvas->drawPaint(paint);
SkPaint filterPaint;
// the green color will be ignored by the filter within the runtime shader
filterPaint.setColor(SK_ColorGREEN);
filterPaint.setImageFilter(filter);
canvas->saveLayer(nullptr, &filterPaint);
// the blue color will be ignored by the filter because the input to the image filter is not
// null
canvas->drawColor(SK_ColorBLUE);
canvas->restore();
// This is expected to read back the half transparent red pixel produced by the image filter
SkBitmap bitmap;
REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo()));
REPORTER_ASSERT(r,
surface->readPixels(bitmap.info(),
bitmap.getPixels(),
bitmap.rowBytes(),
/*srcX=*/0,
/*srcY=*/0));
SkColor color = bitmap.getColor(/*x=*/0, /*y=*/0);
// check alpha with a small tolerance
SkAlpha alpha = SkColorGetA(color);
REPORTER_ASSERT(r, alpha >= 127 && alpha <= 129, "Expected: %d Actual: %d", 128, alpha);
// check each color channel
color = SkColorSetA(color, 255);
REPORTER_ASSERT(r, SK_ColorRED == color, "Expected: %08x Actual: %08x", SK_ColorRED, color);
}
}
DEF_TEST(SkRuntimeShaderImageFilter_CPU, r) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1);
sk_sp<SkSurface> surface(SkSurface::MakeRaster(info));
test_runtime_shader(r, surface.get());
}
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SkRuntimeShaderImageFilter_GPU, r, ctxInfo) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1);
sk_sp<SkSurface> surface(
SkSurface::MakeRenderTarget(ctxInfo.directContext(), SkBudgeted::kNo, info));
test_runtime_shader(r, surface.get());
}