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skia2/gm/drawbitmaprect.cpp
John Stiles acf7164587 Fix cases of variable shadowing in /gm/. 
If we manage to fix all the existing cases of variable shadowing, we
could enable -Wshadow.

Change-Id: I905459bf0bbaa205da7dc59e1910e345bed2af51
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/438538
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2021-08-13 03:35:15 +00:00

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/*
* Copyright 2011 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/SkBitmap.h"
#include "include/core/SkBlurTypes.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkGradientShader.h"
#include "include/gpu/GrDirectContext.h"
#include "src/core/SkBlurMask.h"
#include "src/core/SkMathPriv.h"
#include "tools/ToolUtils.h"
static SkBitmap make_chessbm(int w, int h) {
SkBitmap bm;
bm.allocN32Pixels(w, h);
for (int y = 0; y < bm.height(); y++) {
uint32_t* p = bm.getAddr32(0, y);
for (int x = 0; x < bm.width(); x++) {
p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
}
}
bm.setImmutable();
return bm;
}
// Creates a bitmap and a matching image.
static sk_sp<SkImage> makebm(SkCanvas* origCanvas, SkBitmap* resultBM, int w, int h) {
SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
auto surface(ToolUtils::makeSurface(origCanvas, info));
SkCanvas* canvas = surface->getCanvas();
canvas->clear(SK_ColorTRANSPARENT);
SkScalar wScalar = SkIntToScalar(w);
SkScalar hScalar = SkIntToScalar(h);
SkPoint pt = { wScalar / 2, hScalar / 2 };
SkScalar radius = 4 * std::max(wScalar, hScalar);
SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
SK_ColorGREEN, SK_ColorMAGENTA,
SK_ColorBLUE, SK_ColorCYAN,
SK_ColorRED};
SkScalar pos[] = {0,
SK_Scalar1 / 6,
2 * SK_Scalar1 / 6,
3 * SK_Scalar1 / 6,
4 * SK_Scalar1 / 6,
5 * SK_Scalar1 / 6,
SK_Scalar1};
SkPaint paint;
SkRect rect = SkRect::MakeWH(wScalar, hScalar);
SkMatrix mat = SkMatrix::I();
for (int i = 0; i < 4; ++i) {
paint.setShader(SkGradientShader::MakeRadial(
pt, radius,
colors, pos,
SK_ARRAY_COUNT(colors),
SkTileMode::kRepeat,
0, &mat));
canvas->drawRect(rect, paint);
rect.inset(wScalar / 8, hScalar / 8);
mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
}
auto image = surface->makeImageSnapshot();
SkBitmap tempBM;
image->asLegacyBitmap(&tempBM);
// Let backends know we won't change this, so they don't have to deep copy it defensively.
tempBM.setImmutable();
*resultBM = tempBM;
return image;
}
static void bitmapproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
const SkRect& dstR, const SkSamplingOptions& sampling,
const SkPaint* paint) {
canvas->drawImageRect(bm.asImage(), SkRect::Make(srcR), dstR, sampling, paint,
SkCanvas::kStrict_SrcRectConstraint);
}
static void bitmapsubsetproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
const SkRect& dstR, const SkSamplingOptions& sampling,
const SkPaint* paint) {
if (!bm.bounds().contains(srcR)) {
bitmapproc(canvas, nullptr, bm, srcR, dstR, sampling, paint);
return;
}
SkBitmap subset;
if (bm.extractSubset(&subset, srcR)) {
canvas->drawImageRect(subset.asImage(), dstR, sampling, paint);
}
}
static void imageproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect& srcR,
const SkRect& dstR, const SkSamplingOptions& sampling, const SkPaint* paint) {
canvas->drawImageRect(image, SkRect::Make(srcR), dstR, sampling, paint,
SkCanvas::kStrict_SrcRectConstraint);
}
static void imagesubsetproc(SkCanvas* canvas, SkImage* image, const SkBitmap& bm,
const SkIRect& srcR, const SkRect& dstR,
const SkSamplingOptions& sampling, const SkPaint* paint) {
if (!image->bounds().contains(srcR)) {
imageproc(canvas, image, bm, srcR, dstR, sampling, paint);
return;
}
auto direct = GrAsDirectContext(canvas->recordingContext());
if (sk_sp<SkImage> subset = image->makeSubset(srcR, direct)) {
canvas->drawImageRect(subset, dstR, sampling, paint);
}
}
typedef void DrawRectRectProc(SkCanvas*, SkImage*, const SkBitmap&, const SkIRect&, const SkRect&,
const SkSamplingOptions&, const SkPaint*);
constexpr int gSize = 1024;
constexpr int gBmpSize = 2048;
class DrawBitmapRectGM : public skiagm::GM {
public:
DrawBitmapRectGM(DrawRectRectProc proc, const char suffix[]) : fProc(proc) {
fName.set("drawbitmaprect");
if (suffix) {
fName.append(suffix);
}
}
DrawRectRectProc* fProc;
SkBitmap fLargeBitmap;
sk_sp<SkImage> fImage;
SkString fName;
protected:
SkString onShortName() override { return fName; }
SkISize onISize() override { return SkISize::Make(gSize, gSize); }
void setupImage(SkCanvas* canvas) {
fImage = makebm(canvas, &fLargeBitmap, gBmpSize, gBmpSize);
}
void onDraw(SkCanvas* canvas) override {
if (!fImage || !fImage->isValid(canvas->recordingContext())) {
this->setupImage(canvas);
}
SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
const int kMaxSrcRectSize = 1 << (SkNextLog2(gBmpSize) + 2);
const int kPadX = 30;
const int kPadY = 40;
SkPaint alphaPaint;
alphaPaint.setAlphaf(0.125f);
canvas->drawImageRect(fImage, SkRect::MakeIWH(gSize, gSize), SkSamplingOptions(),
&alphaPaint);
canvas->translate(SK_Scalar1 * kPadX / 2,
SK_Scalar1 * kPadY / 2);
SkPaint blackPaint;
SkScalar titleHeight = SK_Scalar1 * 24;
blackPaint.setColor(SK_ColorBLACK);
blackPaint.setAntiAlias(true);
SkFont font(ToolUtils::create_portable_typeface(), titleHeight);
SkString title;
title.printf("Bitmap size: %d x %d", gBmpSize, gBmpSize);
canvas->drawString(title, 0, titleHeight, font, blackPaint);
canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight);
int rowCount = 0;
canvas->save();
for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {
SkIRect srcRect = SkIRect::MakeXYWH((gBmpSize - w) / 2, (gBmpSize - h) / 2, w, h);
fProc(canvas, fImage.get(), fLargeBitmap, srcRect, dstRect, SkSamplingOptions(),
nullptr);
SkString label;
label.appendf("%d x %d", w, h);
blackPaint.setAntiAlias(true);
blackPaint.setStyle(SkPaint::kFill_Style);
font.setSize(SK_Scalar1 * 10);
SkScalar baseline = dstRect.height() + font.getSize() + SK_Scalar1 * 3;
canvas->drawString(label, 0, baseline, font, blackPaint);
blackPaint.setStyle(SkPaint::kStroke_Style);
blackPaint.setStrokeWidth(SK_Scalar1);
blackPaint.setAntiAlias(false);
canvas->drawRect(dstRect, blackPaint);
canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
++rowCount;
if ((dstRect.width() + kPadX) * rowCount > gSize) {
canvas->restore();
canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
canvas->save();
rowCount = 0;
}
}
}
{
// test the following code path:
// SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
SkIRect srcRect;
SkPaint maskPaint;
SkBitmap bm = make_chessbm(5, 5);
srcRect.setXYWH(1, 1, 3, 3);
maskPaint.setMaskFilter(SkMaskFilter::MakeBlur(
kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5))));
fProc(canvas, bm.asImage().get(), bm, srcRect, dstRect,
SkSamplingOptions(SkFilterMode::kLinear), &maskPaint);
}
}
private:
using INHERITED = skiagm::GM;
};
DEF_GM( return new DrawBitmapRectGM(bitmapproc , nullptr); )
DEF_GM( return new DrawBitmapRectGM(bitmapsubsetproc, "-subset"); )
DEF_GM( return new DrawBitmapRectGM(imageproc , "-imagerect"); )
DEF_GM( return new DrawBitmapRectGM(imagesubsetproc , "-imagerect-subset"); )
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