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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 GPU backend.
- #include "gm/gm.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkFilterQuality.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/GrContext.h"
- #include "include/gpu/GrTypes.h"
- #include "include/gpu/gl/GrGLFunctions.h"
- #include "include/gpu/gl/GrGLInterface.h"
- #include "include/gpu/gl/GrGLTypes.h"
- #include "include/private/GrTypesPriv.h"
- #include "src/gpu/GrContextPriv.h"
- #include "src/gpu/GrGpu.h"
- #include "src/gpu/gl/GrGLContext.h"
- #include "src/gpu/gl/GrGLDefines.h"
- #include "src/gpu/gl/GrGLUtil.h"
- #include <algorithm>
- #include <cstdint>
- #include <memory>
- class GrRenderTargetContext;
- namespace skiagm {
- class RectangleTexture : public GpuGM {
- public:
- RectangleTexture() {
- this->setBGColor(0xFFFFFFFF);
- }
- protected:
- SkString onShortName() override {
- return SkString("rectangle_texture");
- }
- SkISize onISize() override { return SkISize::Make(1200, 500); }
- void fillPixels(int width, int height, void *pixels) {
- SkBitmap bmp;
- bmp.setInfo(SkImageInfo::Make(width, height, kRGBA_8888_SkColorType, kOpaque_SkAlphaType));
- bmp.setPixels(pixels);
- SkPaint paint;
- SkCanvas canvas(bmp);
- SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} };
- 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(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2,
- SkIntToScalar(width + height) / 5, paint);
- }
- static const GrGLContext* GetGLContextIfSupported(GrContext* context) {
- if (context->backend() != GrBackendApi::kOpenGL) {
- return nullptr;
- }
- auto* caps = static_cast<const GrGLCaps*>(context->priv().caps());
- if (!caps->rectangleTextureSupport()) {
- return nullptr;
- }
- return context->priv().getGpu()->glContextForTesting();
- }
- sk_sp<SkImage> createRectangleTextureImg(GrContext* context, GrSurfaceOrigin origin, int width,
- int height, const uint32_t* pixels) {
- const GrGLContext* glCtx = GetGLContextIfSupported(context);
- if (!glCtx) {
- return nullptr;
- }
- const GrGLInterface* gl = glCtx->interface();
- // Useful for debugging whether errors result from use of RECTANGLE
- // static constexpr GrGLenum kTarget = GR_GL_TEXTURE_2D;
- static constexpr GrGLenum kTarget = GR_GL_TEXTURE_RECTANGLE;
- GrGLuint id = 0;
- GR_GL_CALL(gl, GenTextures(1, &id));
- GR_GL_CALL(gl, BindTexture(kTarget, id));
- GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST));
- GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST));
- GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE));
- GR_GL_CALL(gl, TexParameteri(kTarget, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE));
- std::unique_ptr<uint32_t[]> tempPixels;
- if (origin == kBottomLeft_GrSurfaceOrigin) {
- tempPixels.reset(new uint32_t[width * height]);
- for (int y = 0; y < height; ++y) {
- std::copy_n(pixels + width * (height - y - 1), width, tempPixels.get() + width * y);
- }
- pixels = tempPixels.get();
- }
- GR_GL_CALL(gl, TexImage2D(kTarget, 0, GR_GL_RGBA, width, height, 0, GR_GL_RGBA,
- GR_GL_UNSIGNED_BYTE, pixels));
- context->resetContext();
- GrGLTextureInfo info;
- info.fID = id;
- info.fTarget = kTarget;
- info.fFormat = GR_GL_RGBA8;
- GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info);
- if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex, origin,
- kRGBA_8888_SkColorType)) {
- return image;
- }
- GR_GL_CALL(gl, DeleteTextures(1, &id));
- return nullptr;
- }
- DrawResult onDraw(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas,
- SkString* errorMsg) override {
- if (!GetGLContextIfSupported(context)) {
- *errorMsg = "this GM requires an OpenGL 3.1+ context";
- return DrawResult::kSkip;
- }
- constexpr int kWidth = 50;
- constexpr int kHeight = 50;
- constexpr SkScalar kPad = 5.f;
- SkPMColor pixels[kWidth * kHeight];
- this->fillPixels(kWidth, kHeight, pixels);
- sk_sp<SkImage> rectImgs[] = {
- this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, kWidth, kHeight,
- pixels),
- this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin, kWidth,
- kHeight, pixels),
- };
- SkASSERT(SkToBool(rectImgs[0]) == SkToBool(rectImgs[1]));
- if (!rectImgs[0]) {
- *errorMsg = "Could not create rectangle texture image.";
- return DrawResult::kFail;
- }
- constexpr SkFilterQuality kQualities[] = {
- kNone_SkFilterQuality,
- kLow_SkFilterQuality,
- kMedium_SkFilterQuality,
- kHigh_SkFilterQuality,
- };
- constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f};
- canvas->translate(kPad, kPad);
- for (size_t i = 0; i < SK_ARRAY_COUNT(rectImgs); ++i) {
- for (auto s : kScales) {
- canvas->save();
- canvas->scale(s, s);
- for (auto q : kQualities) {
- // drawImage
- SkPaint plainPaint;
- plainPaint.setFilterQuality(q);
- canvas->drawImage(rectImgs[i], 0, 0, &plainPaint);
- canvas->translate(kWidth + kPad, 0);
- // clamp/clamp shader
- SkPaint clampPaint;
- clampPaint.setFilterQuality(q);
- clampPaint.setShader(rectImgs[i]->makeShader());
- canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint);
- canvas->translate(kWidth * 1.5f + kPad, 0);
- // repeat/mirror shader
- SkPaint repeatPaint;
- repeatPaint.setFilterQuality(q);
- repeatPaint.setShader(rectImgs[i]->makeShader(SkTileMode::kRepeat,
- SkTileMode::kMirror));
- canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint);
- canvas->translate(1.5f * kWidth + kPad, 0);
- // drawImageRect with kStrict
- auto srcRect = SkRect::MakeXYWH(.25f * rectImgs[i]->width(),
- .25f * rectImgs[i]->height(),
- .50f * rectImgs[i]->width(),
- .50f * rectImgs[i]->height());
- auto dstRect = SkRect::MakeXYWH(0, 0,
- .50f * rectImgs[i]->width(),
- .50f * rectImgs[i]->height());
- canvas->drawImageRect(rectImgs[i], srcRect, dstRect, &plainPaint,
- SkCanvas::kStrict_SrcRectConstraint);
- canvas->translate(kWidth * .5f + kPad, 0);
- }
- canvas->restore();
- canvas->translate(0, kPad + 1.5f * kHeight * s);
- }
- }
- return DrawResult::kOk;
- }
- private:
- typedef GM INHERITED;
- };
- DEF_GM(return new RectangleTexture;)
- }
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