/* * Copyright 2015 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm.h" #include "sk_tool_utils.h" #include "Resources.h" #include "SkCanvas.h" #include "SkGradientShader.h" #include "SkRandomScalerContext.h" #include "SkStream.h" #include "SkSurface.h" #include "SkTextBlob.h" #include "SkTypeface.h" #include "GrContext.h" namespace skiagm { class TextBlobRandomFont : public GM { public: // This gm tests that textblobs can be translated and scaled with a font that returns random // but deterministic masks TextBlobRandomFont() { } protected: void onOnceBeforeDraw() override { SkTextBlobBuilder builder; const char* text = "The quick brown fox jumps over the lazy dog."; // make textbloben SkPaint paint; paint.setTextSize(32); paint.setAntiAlias(true); paint.setLCDRenderText(true); // Setup our random scaler context auto typeface = sk_tool_utils::create_portable_typeface("sans-serif", SkFontStyle::Bold()); if (!typeface) { typeface = SkTypeface::MakeDefault(); } paint.setColor(SK_ColorMAGENTA); paint.setTypeface(sk_make_sp(std::move(typeface), paint, false)); SkScalar y = 0; SkRect bounds; paint.measureText(text, strlen(text), &bounds); y -= bounds.fTop; sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, y); y += bounds.fBottom; // A8 const char* bigtext1 = "The quick brown fox"; const char* bigtext2 = "jumps over the lazy dog."; paint.setTextSize(160); paint.setSubpixelText(false); paint.setLCDRenderText(false); paint.measureText(bigtext1, strlen(bigtext1), &bounds); y -= bounds.fTop; sk_tool_utils::add_to_text_blob(&builder, bigtext1, paint, 0, y); y += bounds.fBottom; paint.measureText(bigtext2, strlen(bigtext2), &bounds); y -= bounds.fTop; sk_tool_utils::add_to_text_blob(&builder, bigtext2, paint, 0, y); y += bounds.fBottom; // color emoji if (sk_sp origEmoji = sk_tool_utils::emoji_typeface()) { paint.setTypeface(sk_make_sp(origEmoji, paint, false)); const char* emojiText = sk_tool_utils::emoji_sample_text(); paint.measureText(emojiText, strlen(emojiText), &bounds); y -= bounds.fTop; sk_tool_utils::add_to_text_blob(&builder, emojiText, paint, 0, y); y += bounds.fBottom; } // build fBlob = builder.make(); } SkString onShortName() override { return SkString("textblobrandomfont"); } SkISize onISize() override { return SkISize::Make(kWidth, kHeight); } void onDraw(SkCanvas* canvas) override { // This GM exists to test a specific feature of the GPU backend. // This GM uses sk_tool_utils::makeSurface which doesn't work well with vias. // This GM uses SkRandomTypeface which doesn't work well with serialization. if (nullptr == canvas->getGrContext()) { skiagm::GM::DrawGpuOnlyMessage(canvas); return; } canvas->drawColor(SK_ColorWHITE); SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, canvas->imageInfo().colorType(), kPremul_SkAlphaType, canvas->imageInfo().refColorSpace()); SkSurfaceProps props(0, kUnknown_SkPixelGeometry); auto surface(sk_tool_utils::makeSurface(canvas, info, &props)); if (!surface) { const char* text = "This test requires a surface"; size_t len = strlen(text); SkPaint paint; canvas->drawText(text, len, 10, 100, paint); return; } SkPaint paint; paint.setAntiAlias(true); SkCanvas* surfaceCanvas = surface->getCanvas(); SkScalar stride = SkScalarCeilToScalar(fBlob->bounds().height()); SkScalar yOffset = 5; canvas->save(); // Originally we would alternate between rotating and not to force blob regeneration, // but that code seems to have rotted. Keeping the rotate to match the old GM as // much as possible, and it seems like a reasonable stress test for transformed // color emoji. canvas->rotate(-0.05f); canvas->drawTextBlob(fBlob, 10, yOffset, paint); yOffset += stride; canvas->restore(); // this will test lcd masks when not requested // on cpu this currently causes unspecified behavior, so avoid until it is fixed if (canvas->getGrContext()) { // Rotate in the surface canvas, not the final canvas, to avoid aliasing surfaceCanvas->rotate(-0.05f); surfaceCanvas->drawTextBlob(fBlob, 10, yOffset, paint); surface->draw(canvas, 0, 0, nullptr); } yOffset += stride; // free gpu resources and verify if (canvas->getGrContext()) { canvas->getGrContext()->freeGpuResources(); } canvas->rotate(-0.05f); canvas->drawTextBlob(fBlob, 10, yOffset, paint); yOffset += stride; } private: sk_sp fBlob; static constexpr int kWidth = 2000; static constexpr int kHeight = 1600; typedef GM INHERITED; }; ////////////////////////////////////////////////////////////////////////////// DEF_GM(return new TextBlobRandomFont;) }