/* * 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/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 #include #include class GrRenderTargetContext; namespace skiagm { class RectangleTexture : public GpuGM { 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; } static const GrGLContext* GetGLContextIfSupported(GrContext* context) { if (context->backend() != GrBackendApi::kOpenGL) { return nullptr; } auto* caps = static_cast(context->priv().caps()); if (!caps->rectangleTextureSupport()) { return nullptr; } return context->priv().getGpu()->glContextForTesting(); } sk_sp createRectangleTextureImg(GrContext* context, GrSurfaceOrigin origin, const SkBitmap content) { SkASSERT(content.colorType() == kRGBA_8888_SkColorType); const GrGLContext* glCtx = GetGLContextIfSupported(context); if (!glCtx) { return nullptr; } const GrGLInterface* gl = glCtx->glInterface(); // 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 tempPixels; auto src = content.getAddr32(0, 0); int h = content.height(); int w = content.width(); if (origin == kBottomLeft_GrSurfaceOrigin) { tempPixels.reset(new uint32_t[w * h]); for (int y = 0; y < h; ++y) { std::copy_n(src + w*(h - y - 1), w, tempPixels.get() + w*y); } src = tempPixels.get(); } GR_GL_CALL(gl, TexImage2D(kTarget, 0, GR_GL_RGBA, w, h, 0, GR_GL_RGBA, GR_GL_UNSIGNED_BYTE, src)); context->resetContext(); GrGLTextureInfo info; info.fID = id; info.fTarget = kTarget; info.fFormat = GR_GL_RGBA8; GrBackendTexture rectangleTex(w, h, GrMipMapped::kNo, info); if (sk_sp image = SkImage::MakeFromAdoptedTexture( context, rectangleTex, origin, content.colorType(), content.alphaType())) { 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 context that supports texture rectangles."; return DrawResult::kSkip; } auto gradCircle = this->makeImagePixels(50, ImageType::kGradientCircle); static constexpr SkScalar kPad = 5.f; sk_sp gradImgs[] = { this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, gradCircle), this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin, gradCircle), }; SkASSERT(SkToBool(gradImgs[0]) == SkToBool(gradImgs[1])); if (!gradImgs[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(gradImgs); ++i) { auto img = gradImgs[i]; int w = img->width(); int h = img->height(); for (auto s : kScales) { canvas->save(); canvas->scale(s, s); for (auto q : kQualities) { // drawImage SkPaint plainPaint; plainPaint.setFilterQuality(q); canvas->drawImage(img, 0, 0, &plainPaint); canvas->translate(w + kPad, 0); // clamp/clamp shader SkPaint clampPaint; clampPaint.setFilterQuality(q); clampPaint.setShader(gradImgs[i]->makeShader()); canvas->drawRect(SkRect::MakeWH(1.5f*w, 1.5f*h), clampPaint); canvas->translate(1.5f*w + kPad, 0); // repeat/mirror shader SkPaint repeatPaint; repeatPaint.setFilterQuality(q); repeatPaint.setShader(gradImgs[i]->makeShader(SkTileMode::kRepeat, SkTileMode::kMirror)); 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(gradImgs[i], srcRect, dstRect, &plainPaint, SkCanvas::kStrict_SrcRectConstraint); canvas->translate(.5f*w + kPad, 0); } canvas->restore(); canvas->translate(0, kPad + 1.5f*h*s); } } auto smallImg = this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin, this->makeImagePixels(2, ImageType::k2x2)); static constexpr SkScalar kOutset = 25.f; canvas->translate(kOutset, kOutset); auto dstRect = SkRect::Make(smallImg->dimensions()).makeOutset(kOutset, kOutset); for (int fq = kNone_SkFilterQuality; fq <= kLast_SkFilterQuality; ++fq) { if (fq == kMedium_SkFilterQuality) { // 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); auto shader = smallImg->makeShader(static_cast(tx), static_cast(ty), &lm); SkPaint paint; paint.setShader(std::move(shader)); paint.setFilterQuality(static_cast(fq)); 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: typedef GM INHERITED; }; DEF_GM(return new RectangleTexture;) } #endif