/* * 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/gm.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkColorSpace.h" #include "include/core/SkFont.h" #include "include/core/SkFontStyle.h" #include "include/core/SkFontTypes.h" #include "include/core/SkImageInfo.h" #include "include/core/SkPaint.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkScalar.h" #include "include/core/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkSurface.h" #include "include/core/SkSurfaceProps.h" #include "include/core/SkTextBlob.h" #include "include/core/SkTypeface.h" #include "include/gpu/GrDirectContext.h" #include "include/gpu/GrRecordingContext.h" #include "tools/ToolUtils.h" #include "tools/fonts/RandomScalerContext.h" #include <string.h> #include <utility> class GrSurfaceDrawContext; namespace skiagm { class TextBlobRandomFont : public GpuGM { 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."; SkPaint paint; paint.setAntiAlias(true); paint.setColor(SK_ColorMAGENTA); // make textbloben SkFont font; font.setSize(32); font.setEdging(SkFont::Edging::kSubpixelAntiAlias); // Setup our random scaler context auto typeface = ToolUtils::create_portable_typeface("sans-serif", SkFontStyle::Bold()); if (!typeface) { typeface = SkTypeface::MakeDefault(); } font.setTypeface(sk_make_sp<SkRandomTypeface>(std::move(typeface), paint, false)); SkScalar y = 0; SkRect bounds; font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds); y -= bounds.fTop; ToolUtils::add_to_text_blob(&builder, text, font, 0, y); y += bounds.fBottom; // A8 const char* bigtext1 = "The quick brown fox"; const char* bigtext2 = "jumps over the lazy dog."; font.setSize(160); font.setSubpixel(false); font.setEdging(SkFont::Edging::kAntiAlias); font.measureText(bigtext1, strlen(bigtext1), SkTextEncoding::kUTF8, &bounds); y -= bounds.fTop; ToolUtils::add_to_text_blob(&builder, bigtext1, font, 0, y); y += bounds.fBottom; font.measureText(bigtext2, strlen(bigtext2), SkTextEncoding::kUTF8, &bounds); y -= bounds.fTop; ToolUtils::add_to_text_blob(&builder, bigtext2, font, 0, y); y += bounds.fBottom; // color emoji if (sk_sp<SkTypeface> origEmoji = ToolUtils::emoji_typeface()) { font.setTypeface(sk_make_sp<SkRandomTypeface>(origEmoji, paint, false)); const char* emojiText = ToolUtils::emoji_sample_text(); font.measureText(emojiText, strlen(emojiText), SkTextEncoding::kUTF8, &bounds); y -= bounds.fTop; ToolUtils::add_to_text_blob(&builder, emojiText, font, 0, y); y += bounds.fBottom; } // build fBlob = builder.make(); } SkString onShortName() override { return SkString("textblobrandomfont"); } SkISize onISize() override { return SkISize::Make(kWidth, kHeight); } DrawResult onDraw(GrRecordingContext* context, GrSurfaceDrawContext*, SkCanvas* canvas, SkString* errorMsg) override { // This GM exists to test a specific feature of the GPU backend. // This GM uses ToolUtils::makeSurface which doesn't work well with vias. // This GM uses SkRandomTypeface which doesn't work well with serialization. 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(ToolUtils::makeSurface(canvas, info, &props)); if (!surface) { *errorMsg = "This test requires a surface"; return DrawResult::kFail; } 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(); // 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); yOffset += stride; if (auto direct = context->asDirectContext()) { // free gpu resources and verify direct->freeGpuResources(); } canvas->rotate(-0.05f); canvas->drawTextBlob(fBlob, 10, yOffset, paint); yOffset += stride; return DrawResult::kOk; } private: sk_sp<SkTextBlob> fBlob; static constexpr int kWidth = 2000; static constexpr int kHeight = 1600; using INHERITED = GM; }; ////////////////////////////////////////////////////////////////////////////// DEF_GM(return new TextBlobRandomFont;) } // namespace skiagm