1/* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include "gm.h" 9#include "SkGradientShader.h" 10#include "SkSurface.h" 11#include "SkSurfaceProps.h" 12 13#define W 200 14#define H 100 15 16static SkShader* make_shader() { 17 int a = 0x99; 18 int b = 0xBB; 19 SkPoint pts[] = { { 0, 0 }, { W, H } }; 20 SkColor colors[] = { SkColorSetRGB(a, a, a), SkColorSetRGB(b, b, b) }; 21 return SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode); 22} 23 24static SkSurface* make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelGeometry geo, 25 int disallowAA, int disallowDither) { 26 uint32_t flags = 0; 27 if (disallowAA) { 28 flags |= SkSurfaceProps::kDisallowAntiAlias_Flag; 29 } 30 if (disallowDither) { 31 flags |= SkSurfaceProps::kDisallowDither_Flag; 32 } 33 34 SkSurfaceProps props(flags, geo); 35 if (ctx) { 36 return SkSurface::NewRenderTarget(ctx, info, 0, &props); 37 } else { 38 return SkSurface::NewRaster(info, &props); 39 } 40} 41 42static void test_draw(SkCanvas* canvas, const char label[]) { 43 SkPaint paint; 44 45 paint.setAntiAlias(true); 46 paint.setLCDRenderText(true); 47 paint.setDither(true); 48 49 paint.setShader(make_shader())->unref(); 50 canvas->drawRect(SkRect::MakeWH(W, H), paint); 51 paint.setShader(NULL); 52 53 paint.setColor(SK_ColorWHITE); 54 paint.setTextSize(32); 55 paint.setTextAlign(SkPaint::kCenter_Align); 56 canvas->drawText(label, strlen(label), W / 2, H * 3 / 4, paint); 57} 58 59class SurfacePropsGM : public skiagm::GM { 60public: 61 SurfacePropsGM() {} 62 63protected: 64 SkString onShortName() SK_OVERRIDE { 65 return SkString("surfaceprops"); 66 } 67 68 virtual SkISize onISize() SK_OVERRIDE { 69 return SkISize::Make(W * 4, H * 5); 70 } 71 72 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 73 GrContext* ctx = canvas->getGrContext(); 74 75 // must be opaque to have a hope of testing LCD text 76 const SkImageInfo info = SkImageInfo::MakeN32(W, H, kOpaque_SkAlphaType); 77 78 const struct { 79 SkPixelGeometry fGeo; 80 const char* fLabel; 81 } rec[] = { 82 { kUnknown_SkPixelGeometry, "Unknown" }, 83 { kRGB_H_SkPixelGeometry, "RGB_H" }, 84 { kBGR_H_SkPixelGeometry, "BGR_H" }, 85 { kRGB_V_SkPixelGeometry, "RGB_V" }, 86 { kBGR_V_SkPixelGeometry, "BGR_V" }, 87 }; 88 89 SkScalar x = 0; 90 for (int disallowAA = 0; disallowAA <= 1; ++disallowAA) { 91 for (int disallowDither = 0; disallowDither <= 1; ++disallowDither) { 92 SkScalar y = 0; 93 for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) { 94 SkAutoTUnref<SkSurface> surface(make_surface(ctx, info, rec[i].fGeo, 95 disallowAA, disallowDither)); 96 test_draw(surface->getCanvas(), rec[i].fLabel); 97 surface->draw(canvas, x, y, NULL); 98 y += H; 99 } 100 x += W; 101 } 102 } 103 } 104 105private: 106 typedef GM INHERITED; 107}; 108 109DEF_GM( return new SurfacePropsGM ) 110