| /* |
| * Copyright 2011 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 "Resources.h" |
| #include "SkCanvas.h" |
| #include "SkStream.h" |
| #include "SkSurface.h" |
| #include "SkTypeface.h" |
| |
| class DFTextGM : public skiagm::GM { |
| public: |
| DFTextGM() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| void onOnceBeforeDraw() override { |
| sk_tool_utils::emoji_typeface(&fEmojiTypeface); |
| fEmojiText = sk_tool_utils::emoji_sample_text(); |
| } |
| |
| SkString onShortName() override { |
| SkString name("dftext"); |
| name.append(sk_tool_utils::platform_os_emoji()); |
| return name; |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(1024, 768); |
| } |
| |
| static void rotate_about(SkCanvas* canvas, |
| SkScalar degrees, |
| SkScalar px, SkScalar py) { |
| canvas->translate(px, py); |
| canvas->rotate(degrees); |
| canvas->translate(-px, -py); |
| } |
| |
| virtual void onDraw(SkCanvas* inputCanvas) override { |
| SkScalar textSizes[] = { 9.0f, 9.0f*2.0f, 9.0f*5.0f, 9.0f*2.0f*5.0f }; |
| SkScalar scales[] = { 2.0f*5.0f, 5.0f, 2.0f, 1.0f }; |
| |
| // set up offscreen rendering with distance field text |
| #if SK_SUPPORT_GPU |
| GrContext* ctx = inputCanvas->getGrContext(); |
| SkImageInfo info = SkImageInfo::MakeN32Premul(onISize()); |
| SkSurfaceProps props(SkSurfaceProps::kUseDeviceIndependentFonts_Flag, |
| SkSurfaceProps::kLegacyFontHost_InitType); |
| SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkBudgeted::kNo, |
| info, 0, &props)); |
| SkCanvas* canvas = surface.get() ? surface->getCanvas() : inputCanvas; |
| // init our new canvas with the old canvas's matrix |
| canvas->setMatrix(inputCanvas->getTotalMatrix()); |
| #else |
| SkCanvas* canvas = inputCanvas; |
| #endif |
| // apply global scale to test glyph positioning |
| canvas->scale(1.05f, 1.05f); |
| canvas->clear(0xffffffff); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setSubpixelText(true); |
| |
| sk_tool_utils::set_portable_typeface(&paint, "serif", SkTypeface::kNormal); |
| |
| const char* text = "Hamburgefons"; |
| const size_t textLen = strlen(text); |
| |
| // check scaling up |
| SkScalar x = SkIntToScalar(0); |
| SkScalar y = SkIntToScalar(78); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(textSizes); ++i) { |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->translate(x, y); |
| canvas->scale(scales[i], scales[i]); |
| paint.setTextSize(textSizes[i]); |
| canvas->drawText(text, textLen, 0, 0, paint); |
| y += paint.getFontMetrics(nullptr)*scales[i]; |
| } |
| |
| // check rotation |
| for (size_t i = 0; i < 5; ++i) { |
| SkScalar rotX = SkIntToScalar(10); |
| SkScalar rotY = y; |
| |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->translate(SkIntToScalar(10 + i * 200), -80); |
| rotate_about(canvas, SkIntToScalar(i * 5), rotX, rotY); |
| for (int ps = 6; ps <= 32; ps += 3) { |
| paint.setTextSize(SkIntToScalar(ps)); |
| canvas->drawText(text, textLen, rotX, rotY, paint); |
| rotY += paint.getFontMetrics(nullptr); |
| } |
| } |
| |
| // check scaling down |
| paint.setLCDRenderText(true); |
| x = SkIntToScalar(680); |
| y = SkIntToScalar(20); |
| size_t arraySize = SK_ARRAY_COUNT(textSizes); |
| for (size_t i = 0; i < arraySize; ++i) { |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->translate(x, y); |
| SkScalar scaleFactor = SkScalarInvert(scales[arraySize - i - 1]); |
| canvas->scale(scaleFactor, scaleFactor); |
| paint.setTextSize(textSizes[i]); |
| canvas->drawText(text, textLen, 0, 0, paint); |
| y += paint.getFontMetrics(nullptr)*scaleFactor; |
| } |
| |
| // check pos text |
| { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| canvas->scale(2.0f, 2.0f); |
| |
| SkAutoTArray<SkPoint> pos(SkToInt(textLen)); |
| SkAutoTArray<SkScalar> widths(SkToInt(textLen)); |
| paint.setTextSize(textSizes[0]); |
| |
| paint.getTextWidths(text, textLen, &widths[0]); |
| |
| SkScalar x = SkIntToScalar(340); |
| SkScalar y = SkIntToScalar(75); |
| for (unsigned int i = 0; i < textLen; ++i) { |
| pos[i].set(x, y); |
| x += widths[i]; |
| } |
| |
| canvas->drawPosText(text, textLen, &pos[0], paint); |
| } |
| |
| |
| // check gamma-corrected blending |
| const SkColor fg[] = { |
| 0xFFFFFFFF, |
| 0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF, |
| 0xFFFF0000, 0xFF00FF00, 0xFF0000FF, |
| 0xFF000000, |
| }; |
| |
| paint.setColor(0xFFF7F3F7); |
| SkRect r = SkRect::MakeLTRB(670, 215, 820, 397); |
| canvas->drawRect(r, paint); |
| |
| x = SkIntToScalar(680); |
| y = SkIntToScalar(235); |
| paint.setTextSize(SkIntToScalar(19)); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) { |
| paint.setColor(fg[i]); |
| |
| canvas->drawText(text, textLen, x, y, paint); |
| y += paint.getFontMetrics(nullptr); |
| } |
| |
| paint.setColor(0xFF181C18); |
| r = SkRect::MakeLTRB(820, 215, 970, 397); |
| canvas->drawRect(r, paint); |
| |
| x = SkIntToScalar(830); |
| y = SkIntToScalar(235); |
| paint.setTextSize(SkIntToScalar(19)); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) { |
| paint.setColor(fg[i]); |
| |
| canvas->drawText(text, textLen, x, y, paint); |
| y += paint.getFontMetrics(nullptr); |
| } |
| |
| // check skew |
| { |
| paint.setLCDRenderText(false); |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->skew(0.0f, 0.151515f); |
| paint.setTextSize(SkIntToScalar(32)); |
| canvas->drawText(text, textLen, 745, 70, paint); |
| } |
| { |
| paint.setLCDRenderText(true); |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->skew(0.5f, 0.0f); |
| paint.setTextSize(SkIntToScalar(32)); |
| canvas->drawText(text, textLen, 580, 125, paint); |
| } |
| |
| // check color emoji |
| if (fEmojiTypeface) { |
| paint.setTypeface(fEmojiTypeface); |
| paint.setTextSize(SkIntToScalar(19)); |
| canvas->drawText(fEmojiText, strlen(fEmojiText), 670, 90, paint); |
| } |
| #if SK_SUPPORT_GPU |
| // render offscreen buffer |
| if (surface) { |
| SkAutoCanvasRestore acr(inputCanvas, true); |
| // since we prepended this matrix already, we blit using identity |
| inputCanvas->resetMatrix(); |
| inputCanvas->drawImage(surface->makeImageSnapshot().get(), 0, 0, nullptr); |
| } |
| #endif |
| } |
| |
| private: |
| SkAutoTUnref<SkTypeface> fEmojiTypeface; |
| const char* fEmojiText; |
| |
| typedef skiagm::GM INHERITED; |
| }; |
| |
| DEF_GM(return new DFTextGM;) |