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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrRenderTargetContextPriv.h"
#include "SkGr.h"
#include "SkGradientShader.h"
#include "effects/GrConstColorProcessor.h"
#include "ops/GrDrawOp.h"
#include "ops/GrRectOpFactory.h"
namespace skiagm {
/**
* This GM directly exercises GrConstColorProcessor.
*/
class ConstColorProcessor : public GM {
public:
ConstColorProcessor() {
this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
}
protected:
SkString onShortName() override {
return SkString("const_color_processor");
}
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
}
void onOnceBeforeDraw() override {
SkColor colors[] = { 0xFFFF0000, 0x2000FF00, 0xFF0000FF};
SkPoint pts[] = { SkPoint::Make(0, 0), SkPoint::Make(kRectSize, kRectSize) };
fShader = SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
}
void onDraw(SkCanvas* canvas) override {
GrRenderTargetContext* renderTargetContext =
canvas->internal_private_accessTopLayerRenderTargetContext();
if (!renderTargetContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
constexpr GrColor kColors[] = {
0xFFFFFFFF,
0xFFFF00FF,
0x80000000,
0x00000000,
};
constexpr SkColor kPaintColors[] = {
0xFFFFFFFF,
0xFFFF0000,
0x80FF0000,
0x00000000,
};
const char* kModeStrs[] {
"kIgnore",
"kModulateRGBA",
"kModulateA",
};
GR_STATIC_ASSERT(SK_ARRAY_COUNT(kModeStrs) == GrConstColorProcessor::kInputModeCnt);
SkScalar y = kPad;
SkScalar x = kPad;
SkScalar maxW = 0;
for (size_t paintType = 0; paintType < SK_ARRAY_COUNT(kPaintColors) + 1; ++paintType) {
for (size_t procColor = 0; procColor < SK_ARRAY_COUNT(kColors); ++procColor) {
for (int m = 0; m < GrConstColorProcessor::kInputModeCnt; ++m) {
// translate by x,y for the canvas draws and the test target draws.
canvas->save();
canvas->translate(x, y);
const SkMatrix viewMatrix = SkMatrix::MakeTrans(x, y);
// rect to draw
SkRect renderRect = SkRect::MakeXYWH(0, 0, kRectSize, kRectSize);
GrPaint grPaint;
SkPaint skPaint;
if (paintType >= SK_ARRAY_COUNT(kPaintColors)) {
skPaint.setShader(fShader);
} else {
skPaint.setColor(kPaintColors[paintType]);
}
SkAssertResult(SkPaintToGrPaint(context, renderTargetContext, skPaint,
viewMatrix, &grPaint));
GrConstColorProcessor::InputMode mode = (GrConstColorProcessor::InputMode) m;
GrColor4f color = GrColor4f::FromGrColor(kColors[procColor]);
sk_sp<GrFragmentProcessor> fp(GrConstColorProcessor::Make(color, mode));
grPaint.addColorFragmentProcessor(std::move(fp));
std::unique_ptr<GrMeshDrawOp> op(GrRectOpFactory::MakeNonAAFill(
grPaint.getColor(), viewMatrix, renderRect, nullptr, nullptr));
renderTargetContext->priv().testingOnly_addMeshDrawOp(
std::move(grPaint), GrAAType::kNone, std::move(op));
// Draw labels for the input to the processor and the processor to the right of
// the test rect. The input label appears above the processor label.
SkPaint labelPaint;
sk_tool_utils::set_portable_typeface(&labelPaint);
labelPaint.setAntiAlias(true);
labelPaint.setTextSize(10.f);
SkString inputLabel;
inputLabel.set("Input: ");
if (paintType >= SK_ARRAY_COUNT(kPaintColors)) {
inputLabel.append("gradient");
} else {
inputLabel.appendf("0x%08x", kPaintColors[paintType]);
}
SkString procLabel;
procLabel.printf("Proc: [0x%08x, %s]", kColors[procColor], kModeStrs[m]);
SkRect inputLabelBounds;
// get the bounds of the text in order to position it
labelPaint.measureText(inputLabel.c_str(), inputLabel.size(),
&inputLabelBounds);
canvas->drawText(inputLabel.c_str(), inputLabel.size(),
renderRect.fRight + kPad,
-inputLabelBounds.fTop, labelPaint);
// update the bounds to reflect the offset we used to draw it.
inputLabelBounds.offset(renderRect.fRight + kPad, -inputLabelBounds.fTop);
SkRect procLabelBounds;
labelPaint.measureText(procLabel.c_str(), procLabel.size(),
&procLabelBounds);
canvas->drawText(procLabel.c_str(), procLabel.size(),
renderRect.fRight + kPad,
inputLabelBounds.fBottom + 2.f - procLabelBounds.fTop,
labelPaint);
procLabelBounds.offset(renderRect.fRight + kPad,
inputLabelBounds.fBottom + 2.f - procLabelBounds.fTop);
labelPaint.setStrokeWidth(0);
labelPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(renderRect, labelPaint);
canvas->restore();
// update x and y for the next test case.
SkScalar height = renderRect.height();
SkScalar width = SkTMax(inputLabelBounds.fRight, procLabelBounds.fRight);
maxW = SkTMax(maxW, width);
y += height + kPad;
if (y + height > kHeight) {
y = kPad;
x += maxW + kPad;
maxW = 0;
}
}
}
}
}
private:
// Use this as a way of generating and input FP
sk_sp<SkShader> fShader;
static constexpr SkScalar kPad = 10.f;
static constexpr SkScalar kRectSize = 20.f;
static constexpr int kWidth = 820;
static constexpr int kHeight = 500;
typedef GM INHERITED;
};
DEF_GM(return new ConstColorProcessor;)
}
#endif
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