/* * 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.h" #include "GrBackendSurface.h" #include "GrContext.h" #include "GrContextPriv.h" #include "GrGpu.h" #include "gl/GrGLContext.h" #include "SkBitmap.h" #include "SkGradientShader.h" #include "SkImage.h" 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::MakeN32(width, height, kOpaque_SkAlphaType), width * 4); 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) { GrGpu* gpu = context->priv().getGpu(); if (!gpu) { return nullptr; } const GrGLContext* glCtx = gpu->glContextForTesting(); if (!glCtx) { return nullptr; } #if 0 // TODO(bsalomon): use extensions on GLES? bool is_GL31 = glCtx->standard() == kGL_GrGLStandard && glCtx->version() >= GR_GL_VER(3, 1); if (!is_GL31 && !glCtx->hasExtension("GL_ARB_texture_rectangle") && !glCtx->hasExtension("GL_ANGLE_texture_rectangle")) { return nullptr; } #else if (glCtx->standard() != kGL_GrGLStandard) { return nullptr; } if (glCtx->version() < GR_GL_VER(3,1) && !glCtx->hasExtension("GL_ARB_texture_rectangle") && !glCtx->hasExtension("GL_ANGLE_texture_rectangle")) { return nullptr; } #endif return glCtx; } sk_sp createRectangleTextureImg(GrContext* context, GrSurfaceOrigin origin, int width, int height, const uint32_t* pixels) { const GrGLContext* glCtx = GetGLContextIfSupported(context); if (!glCtx) { return nullptr; } // We will always create the GL texture as GL_RGBA, however the pixels uploaded may be // be RGBA or BGRA, depending on how SkPMColor was compiled. GrGLenum format; if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) { format = GR_GL_BGRA; } else { SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig); format = GR_GL_RGBA; } 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 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, format, 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 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 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;) }