| /* |
| * 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 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 = sk_tool_utils::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), kUTF8_SkTextEncoding, &bounds); |
| y -= bounds.fTop; |
| sk_tool_utils::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), kUTF8_SkTextEncoding, &bounds); |
| y -= bounds.fTop; |
| sk_tool_utils::add_to_text_blob(&builder, bigtext1, font, 0, y); |
| y += bounds.fBottom; |
| |
| font.measureText(bigtext2, strlen(bigtext2), kUTF8_SkTextEncoding, &bounds); |
| y -= bounds.fTop; |
| sk_tool_utils::add_to_text_blob(&builder, bigtext2, font, 0, y); |
| y += bounds.fBottom; |
| |
| // color emoji |
| if (sk_sp<SkTypeface> origEmoji = sk_tool_utils::emoji_typeface()) { |
| font.setTypeface(sk_make_sp<SkRandomTypeface>(origEmoji, paint, false)); |
| const char* emojiText = sk_tool_utils::emoji_sample_text(); |
| font.measureText(emojiText, strlen(emojiText), kUTF8_SkTextEncoding, &bounds); |
| y -= bounds.fTop; |
| sk_tool_utils::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(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas, |
| SkString* errorMsg) 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. |
| 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) { |
| *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, nullptr); |
| yOffset += stride; |
| |
| // free gpu resources and verify |
| context->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; |
| |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new TextBlobRandomFont;) |
| } |