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skia2/gm/rectangletexture.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 2016 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 GL backend.
#include "gm/gm.h"
#ifdef SK_GL
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.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/SkTileMode.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkGradientShader.h"
#include "include/gpu/GrBackendSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrTypes.h"
#include "src/core/SkAutoPixmapStorage.h"
#include "src/gpu/GrDirectContextPriv.h"
#include "src/gpu/GrGpu.h"
#include "src/gpu/gl/GrGLCaps.h"
#include "src/gpu/gl/GrGLDefines.h"
#include <algorithm>
#include <cstdint>
#include <memory>
namespace skiagm {
class RectangleTexture : public GM {
public:
RectangleTexture() {
this->setBGColor(0xFFFFFFFF);
}
private:
enum class ImageType {
kGradientCircle,
k2x2
};
SkString onShortName() override {
return SkString("rectangle_texture");
}
SkISize onISize() override { return SkISize::Make(1180, 710); }
SkBitmap makeImagePixels(int size, ImageType type) {
auto ii = SkImageInfo::Make(size, size, kRGBA_8888_SkColorType, kOpaque_SkAlphaType);
switch (type) {
case ImageType::kGradientCircle: {
SkBitmap bmp;
bmp.allocPixels(ii);
SkPaint paint;
SkCanvas canvas(bmp);
SkPoint pts[] = {{0, 0}, {0, SkIntToScalar(size)}};
SkColor colors0[] = {0xFF1060B0, 0xFF102030};
paint.setShader(
SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, SkTileMode::kClamp));
canvas.drawPaint(paint);
SkColor colors1[] = {0xFFA07010, 0xFFA02080};
paint.setAntiAlias(true);
paint.setShader(
SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, SkTileMode::kClamp));
canvas.drawCircle(size/2.f, size/2.f, 2.f*size/5, paint);
return bmp;
}
case ImageType::k2x2: {
SkBitmap bmp;
bmp.allocPixels(ii);
*bmp.getAddr32(0, 0) = 0xFF0000FF;
*bmp.getAddr32(1, 0) = 0xFF00FF00;
*bmp.getAddr32(0, 1) = 0xFFFF0000;
*bmp.getAddr32(1, 1) = 0xFFFFFFFF;
return bmp;
}
}
SkUNREACHABLE;
}
sk_sp<SkImage> createRectangleTextureImg(GrDirectContext* dContext, GrSurfaceOrigin origin,
const SkBitmap content) {
SkASSERT(content.colorType() == kRGBA_8888_SkColorType);
auto format = GrBackendFormat::MakeGL(GR_GL_RGBA8, GR_GL_TEXTURE_RECTANGLE);
auto bet = dContext->createBackendTexture(content.width(), content.height(), format,
GrMipmapped::kNo, GrRenderable::kNo);
if (!bet.isValid()) {
return nullptr;
}
if (!dContext->updateBackendTexture(bet, content.pixmap(), origin, nullptr, nullptr)) {
dContext->deleteBackendTexture(bet);
}
return SkImage::MakeFromAdoptedTexture(dContext, bet, origin, kRGBA_8888_SkColorType);
}
DrawResult onGpuSetup(GrDirectContext* context, SkString* errorMsg) override {
if (!context || context->abandoned()) {
return DrawResult::kSkip;
}
if (context->backend() != GrBackendApi::kOpenGL_GrBackend ||
!static_cast<const GrGLCaps*>(context->priv().caps())->rectangleTextureSupport()) {
*errorMsg = "This GM requires an OpenGL context that supports texture rectangles.";
return DrawResult::kSkip;
}
auto gradCircle = this->makeImagePixels(50, ImageType::kGradientCircle);
fGradImgs[0] = this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin,
gradCircle);
fGradImgs[1] = this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin,
gradCircle);
SkASSERT(SkToBool(fGradImgs[0]) == SkToBool(fGradImgs[1]));
if (!fGradImgs[0]) {
*errorMsg = "Could not create gradient rectangle texture images.";
return DrawResult::kFail;
}
fSmallImg = this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin,
this->makeImagePixels(2, ImageType::k2x2));
if (!fSmallImg) {
*errorMsg = "Could not create 2x2 rectangle texture image.";
return DrawResult::kFail;
}
return DrawResult::kOk;
}
void onGpuTeardown() override {
fGradImgs[0] = fGradImgs[1] = nullptr;
fSmallImg = nullptr;
}
DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
SkASSERT(fGradImgs[0] && fGradImgs[1] && fSmallImg);
static constexpr SkScalar kPad = 5.f;
const SkSamplingOptions kSamplings[] = {
SkSamplingOptions(SkFilterMode::kNearest),
SkSamplingOptions(SkFilterMode::kLinear),
SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
SkSamplingOptions(SkCubicResampler::Mitchell()),
};
constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f};
canvas->translate(kPad, kPad);
for (size_t i = 0; i < kNumGradImages; ++i) {
auto img = fGradImgs[i];
int w = img->width();
int h = img->height();
for (auto scale : kScales) {
canvas->save();
canvas->scale(scale, scale);
for (auto s : kSamplings) {
// drawImage
canvas->drawImage(img, 0, 0, s);
canvas->translate(w + kPad, 0);
// clamp/clamp shader
SkPaint clampPaint;
clampPaint.setShader(fGradImgs[i]->makeShader(s));
canvas->drawRect(SkRect::MakeWH(1.5f*w, 1.5f*h), clampPaint);
canvas->translate(1.5f*w + kPad, 0);
// repeat/mirror shader
SkPaint repeatPaint;
repeatPaint.setShader(fGradImgs[i]->makeShader(SkTileMode::kRepeat,
SkTileMode::kMirror,
s));
canvas->drawRect(SkRect::MakeWH(1.5f*w, 1.5f*h), repeatPaint);
canvas->translate(1.5f*w + kPad, 0);
// drawImageRect with kStrict
auto srcRect = SkRect::MakeXYWH(.25f*w, .25f*h, .50f*w, .50f*h);
auto dstRect = SkRect::MakeXYWH( 0, 0, .50f*w, .50f*h);
canvas->drawImageRect(fGradImgs[i], srcRect, dstRect, s, nullptr,
SkCanvas::kStrict_SrcRectConstraint);
canvas->translate(.5f*w + kPad, 0);
}
canvas->restore();
canvas->translate(0, kPad + 1.5f*h*scale);
}
}
static constexpr SkScalar kOutset = 25.f;
canvas->translate(kOutset, kOutset);
auto dstRect = SkRect::Make(fSmallImg->dimensions()).makeOutset(kOutset, kOutset);
const SkSamplingOptions gSamplings[] = {
SkSamplingOptions(SkFilterMode::kNearest),
SkSamplingOptions(SkFilterMode::kLinear),
SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
SkSamplingOptions(SkCubicResampler::Mitchell()),
};
for (const auto& sampling : gSamplings) {
if (!sampling.useCubic && sampling.mipmap != SkMipmapMode::kNone) {
// Medium is the same as Low for upscaling.
continue;
}
canvas->save();
for (int ty = 0; ty < kSkTileModeCount; ++ty) {
canvas->save();
for (int tx = 0; tx < kSkTileModeCount; ++tx) {
SkMatrix lm;
lm.setRotate(45.f, 1, 1);
lm.postScale(6.5f, 6.5f);
SkPaint paint;
paint.setShader(fSmallImg->makeShader(static_cast<SkTileMode>(tx),
static_cast<SkTileMode>(ty),
sampling,
lm));
canvas->drawRect(dstRect, paint);
canvas->translate(dstRect.width() + kPad, 0);
}
canvas->restore();
canvas->translate(0, dstRect.height() + kPad);
}
canvas->restore();
canvas->translate((dstRect.width() + kPad)*kSkTileModeCount, 0);
}
return DrawResult::kOk;
}
private:
static const int kNumGradImages = 2;
sk_sp<SkImage> fGradImgs[kNumGradImages];
sk_sp<SkImage> fSmallImg;
using INHERITED = GM;
};
DEF_GM(return new RectangleTexture;)
} // namespace skiagm
#endif
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