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 #ifndef sk_tool_utils_DEFINED 9 #define sk_tool_utils_DEFINED 10 11 #include "SkColor.h" 12 #include "SkImageEncoder.h" 13 #include "SkImageInfo.h" 14 #include "SkPixelSerializer.h" 15 #include "SkRandom.h" 16 #include "SkTDArray.h" 17 #include "SkTypeface.h" 18 19 class SkBitmap; 20 class SkCanvas; 21 class SkPaint; 22 class SkPath; 23 class SkShader; 24 class SkTestFont; 25 class SkTextBlobBuilder; 26 27 namespace sk_tool_utils { 28 29 const char* colortype_name(SkColorType); 30 31 /** 32 * Map opaque colors from 8888 to 565. 33 */ 34 SkColor color_to_565(SkColor color); 35 36 /** 37 * Return a color emoji typeface if available. 38 */ 39 void emoji_typeface(SkAutoTUnref<SkTypeface>* ); 40 41 /** 42 * If the platform supports color emoji, return sample text the emoji can render. 43 */ 44 const char* emoji_sample_text(); 45 46 /** 47 * If the platform supports color emoji, return the type (i.e. "CBDT", "SBIX", ""). 48 */ 49 const char* platform_os_emoji(); 50 51 /** 52 * Return the platform name with the version number ("Mac10.9", "Win8", etc.) if available. 53 */ 54 const char* platform_os_name(); 55 56 /** 57 * Return the platform name without the version number ("Mac", "Win", etc.) if available. 58 */ 59 SkString major_platform_os_name(); 60 61 /** 62 * Return the platform extra config (e.g. "GDI") if available. 63 */ 64 const char* platform_extra_config(const char* config); 65 66 /** 67 * Map serif, san-serif, and monospace to the platform-specific font name. 68 */ 69 const char* platform_font_name(const char* name); 70 71 /** 72 * Sets the paint to use a platform-independent text renderer 73 */ 74 void set_portable_typeface(SkPaint* paint, const char* name = nullptr, 75 SkTypeface::Style style = SkTypeface::kNormal); 76 77 /** 78 * Returns a platform-independent text renderer. 79 */ 80 SkTypeface* create_portable_typeface(const char* name, SkTypeface::Style style); 81 82 /** Call to clean up portable font references. */ 83 void release_portable_typefaces(); 84 85 /** 86 * Call canvas->writePixels() by using the pixels from bitmap, but with an info that claims 87 * the pixels are colorType + alphaType 88 */ 89 void write_pixels(SkCanvas*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType); 90 91 // private to sk_tool_utils 92 SkTypeface* create_font(const char* name, SkTypeface::Style); 93 94 /** Returns a newly created CheckerboardShader. */ 95 SkShader* create_checkerboard_shader(SkColor c1, SkColor c2, int size); 96 97 /** Draw a checkerboard pattern in the current canvas, restricted to 98 the current clip, using SkXfermode::kSrc_Mode. */ 99 void draw_checkerboard(SkCanvas* canvas, 100 SkColor color1, 101 SkColor color2, 102 int checkSize); 103 104 /** Make it easier to create a bitmap-based checkerboard */ 105 SkBitmap create_checkerboard_bitmap(int w, int h, 106 SkColor c1, SkColor c2, 107 int checkSize); 108 109 /** A default checkerboard. */ 110 inline void draw_checkerboard(SkCanvas* canvas) { 111 sk_tool_utils::draw_checkerboard(canvas, 0xFF999999, 0xFF666666, 8); 112 } 113 114 SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y, 115 int textSize, const char* str); 116 117 // A helper for inserting a drawtext call into a SkTextBlobBuilder 118 void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint, 119 SkScalar x, SkScalar y); 120 121 void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst); 122 123 void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst); 124 125 void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst); 126 127 void make_big_path(SkPath& path); 128 129 // Return a blurred version of 'src'. This doesn't use a separable filter 130 // so it is slow! 131 SkBitmap slow_blur(const SkBitmap& src, float sigma); 132 133 // A helper object to test the topological sorting code (TopoSortBench.cpp & TopoSortTest.cpp) 134 class TopoTestNode { 135 public: 136 TopoTestNode(int id) : fID(id), fOutputPos(-1), fTempMark(false) { } 137 138 void dependsOn(TopoTestNode* src) { 139 *fDependencies.append() = src; 140 } 141 142 int id() const { return fID; } 143 void reset() { fOutputPos = -1; } 144 145 int outputPos() const { return fOutputPos; } 146 147 // check that the topological sort is valid for this node 148 bool check() { 149 if (-1 == fOutputPos) { 150 return false; 151 } 152 153 for (int i = 0; i < fDependencies.count(); ++i) { 154 if (-1 == fDependencies[i]->outputPos()) { 155 return false; 156 } 157 // This node should've been output after all the nodes on which it depends 158 if (fOutputPos < fDependencies[i]->outputPos()) { 159 return false; 160 } 161 } 162 163 return true; 164 } 165 166 // The following 7 methods are needed by the topological sort 167 static void SetTempMark(TopoTestNode* node) { node->fTempMark = true; } 168 static void ResetTempMark(TopoTestNode* node) { node->fTempMark = false; } 169 static bool IsTempMarked(TopoTestNode* node) { return node->fTempMark; } 170 static void Output(TopoTestNode* node, int outputPos) { 171 SkASSERT(-1 != outputPos); 172 node->fOutputPos = outputPos; 173 } 174 static bool WasOutput(TopoTestNode* node) { return (-1 != node->fOutputPos); } 175 static int NumDependencies(TopoTestNode* node) { return node->fDependencies.count(); } 176 static TopoTestNode* Dependency(TopoTestNode* node, int index) { 177 return node->fDependencies[index]; 178 } 179 180 // Helper functions for TopoSortBench & TopoSortTest 181 static void AllocNodes(SkTDArray<TopoTestNode*>* graph, int num) { 182 graph->setReserve(num); 183 184 for (int i = 0; i < num; ++i) { 185 *graph->append() = new TopoTestNode(i); 186 } 187 } 188 189 static void DeallocNodes(SkTDArray<TopoTestNode*>* graph) { 190 for (int i = 0; i < graph->count(); ++i) { 191 delete (*graph)[i]; 192 } 193 } 194 195 #ifdef SK_DEBUG 196 static void Print(const SkTDArray<TopoTestNode*>& graph) { 197 for (int i = 0; i < graph.count(); ++i) { 198 SkDebugf("%d, ", graph[i]->id()); 199 } 200 SkDebugf("\n"); 201 } 202 #endif 203 204 // randomize the array 205 static void Shuffle(SkTDArray<TopoTestNode*>* graph, SkRandom* rand) { 206 for (int i = graph->count()-1; i > 0; --i) { 207 int swap = rand->nextU() % (i+1); 208 209 TopoTestNode* tmp = (*graph)[i]; 210 (*graph)[i] = (*graph)[swap]; 211 (*graph)[swap] = tmp; 212 } 213 } 214 215 private: 216 int fID; 217 int fOutputPos; 218 bool fTempMark; 219 220 SkTDArray<TopoTestNode*> fDependencies; 221 }; 222 223 } // namespace sk_tool_utils 224 225 #endif // sk_tool_utils_DEFINED 226
