reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef SkPaint_DEFINED |
| 18 | #define SkPaint_DEFINED |
| 19 | |
| 20 | #include "SkColor.h" |
| 21 | #include "SkMath.h" |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 22 | #include "SkXfermode.h" |
| 23 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 24 | class SkAutoGlyphCache; |
| 25 | class SkColorFilter; |
| 26 | class SkDescriptor; |
| 27 | class SkFlattenableReadBuffer; |
| 28 | class SkFlattenableWriteBuffer; |
| 29 | struct SkGlyph; |
| 30 | struct SkRect; |
| 31 | class SkGlyphCache; |
| 32 | class SkMaskFilter; |
| 33 | class SkMatrix; |
| 34 | class SkPath; |
| 35 | class SkPathEffect; |
| 36 | class SkRasterizer; |
| 37 | class SkShader; |
| 38 | class SkDrawLooper; |
| 39 | class SkTypeface; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 40 | |
| 41 | typedef const SkGlyph& (*SkDrawCacheProc)(SkGlyphCache*, const char**, |
| 42 | SkFixed x, SkFixed y); |
| 43 | |
| 44 | typedef const SkGlyph& (*SkMeasureCacheProc)(SkGlyphCache*, const char**); |
| 45 | |
| 46 | /** \class SkPaint |
| 47 | |
| 48 | The SkPaint class holds the style and color information about how to draw |
| 49 | geometries, text and bitmaps. |
| 50 | */ |
ctguil@chromium.org | 7ffb1b2 | 2011-03-15 21:27:08 +0000 | [diff] [blame] | 51 | class SK_API SkPaint { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 52 | public: |
| 53 | SkPaint(); |
| 54 | SkPaint(const SkPaint& paint); |
| 55 | ~SkPaint(); |
| 56 | |
| 57 | SkPaint& operator=(const SkPaint&); |
| 58 | |
ctguil@chromium.org | 7ffb1b2 | 2011-03-15 21:27:08 +0000 | [diff] [blame] | 59 | SK_API friend int operator==(const SkPaint& a, const SkPaint& b); |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 60 | friend int operator!=(const SkPaint& a, const SkPaint& b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 61 | return !(a == b); |
| 62 | } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 63 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 64 | void flatten(SkFlattenableWriteBuffer&) const; |
| 65 | void unflatten(SkFlattenableReadBuffer&); |
| 66 | |
| 67 | /** Restores the paint to its initial settings. |
| 68 | */ |
| 69 | void reset(); |
| 70 | |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 71 | /** Specifies the level of hinting to be performed. These names are taken |
| 72 | from the Gnome/Cairo names for the same. They are translated into |
| 73 | Freetype concepts the same as in cairo-ft-font.c: |
| 74 | kNo_Hinting -> FT_LOAD_NO_HINTING |
| 75 | kSlight_Hinting -> FT_LOAD_TARGET_LIGHT |
| 76 | kNormal_Hinting -> <default, no option> |
| 77 | kFull_Hinting -> <same as kNormalHinting, unless we are rendering |
| 78 | subpixel glyphs, in which case TARGET_LCD or |
| 79 | TARGET_LCD_V is used> |
| 80 | */ |
| 81 | enum Hinting { |
| 82 | kNo_Hinting = 0, |
| 83 | kSlight_Hinting = 1, |
| 84 | kNormal_Hinting = 2, //!< this is the default |
| 85 | kFull_Hinting = 3, |
| 86 | }; |
| 87 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 88 | Hinting getHinting() const { |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 89 | return static_cast<Hinting>(fHinting); |
| 90 | } |
| 91 | |
djsollen@google.com | f5dbe2f | 2011-04-15 13:41:26 +0000 | [diff] [blame^] | 92 | void setHinting(Hinting hintingLevel); |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 93 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 94 | /** Specifies the bit values that are stored in the paint's flags. |
| 95 | */ |
| 96 | enum Flags { |
| 97 | kAntiAlias_Flag = 0x01, //!< mask to enable antialiasing |
| 98 | kFilterBitmap_Flag = 0x02, //!< mask to enable bitmap filtering |
| 99 | kDither_Flag = 0x04, //!< mask to enable dithering |
| 100 | kUnderlineText_Flag = 0x08, //!< mask to enable underline text |
| 101 | kStrikeThruText_Flag = 0x10, //!< mask to enable strike-thru text |
| 102 | kFakeBoldText_Flag = 0x20, //!< mask to enable fake-bold text |
| 103 | kLinearText_Flag = 0x40, //!< mask to enable linear-text |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 104 | kSubpixelText_Flag = 0x80, //!< mask to enable subpixel text positioning |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 105 | kDevKernText_Flag = 0x100, //!< mask to enable device kerning text |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 106 | kLCDRenderText_Flag = 0x200, //!< mask to enable subpixel glyph renderering |
agl@chromium.org | e95c91e | 2010-01-04 18:27:55 +0000 | [diff] [blame] | 107 | kEmbeddedBitmapText_Flag = 0x400, //!< mask to enable embedded bitmap strikes |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 108 | kAutoHinting_Flag = 0x800, //!< mask to force Freetype's autohinter |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 109 | // when adding extra flags, note that the fFlags member is specified |
| 110 | // with a bit-width and you'll have to expand it. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 111 | |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 112 | kAllFlags = 0xFFF |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 113 | }; |
| 114 | |
| 115 | /** Return the paint's flags. Use the Flag enum to test flag values. |
| 116 | @return the paint's flags (see enums ending in _Flag for bit masks) |
| 117 | */ |
| 118 | uint32_t getFlags() const { return fFlags; } |
| 119 | |
| 120 | /** Set the paint's flags. Use the Flag enum to specific flag values. |
| 121 | @param flags The new flag bits for the paint (see Flags enum) |
| 122 | */ |
| 123 | void setFlags(uint32_t flags); |
| 124 | |
| 125 | /** Helper for getFlags(), returning true if kAntiAlias_Flag bit is set |
| 126 | @return true if the antialias bit is set in the paint's flags. |
| 127 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 128 | bool isAntiAlias() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 129 | return SkToBool(this->getFlags() & kAntiAlias_Flag); |
| 130 | } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 131 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 132 | /** Helper for setFlags(), setting or clearing the kAntiAlias_Flag bit |
| 133 | @param aa true to enable antialiasing, false to disable it |
| 134 | */ |
| 135 | void setAntiAlias(bool aa); |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 136 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 137 | /** Helper for getFlags(), returning true if kDither_Flag bit is set |
| 138 | @return true if the dithering bit is set in the paint's flags. |
| 139 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 140 | bool isDither() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 141 | return SkToBool(this->getFlags() & kDither_Flag); |
| 142 | } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 143 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 144 | /** Helper for setFlags(), setting or clearing the kDither_Flag bit |
| 145 | @param dither true to enable dithering, false to disable it |
| 146 | */ |
| 147 | void setDither(bool dither); |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 148 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 149 | /** Helper for getFlags(), returning true if kLinearText_Flag bit is set |
| 150 | @return true if the lineartext bit is set in the paint's flags |
| 151 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 152 | bool isLinearText() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 153 | return SkToBool(this->getFlags() & kLinearText_Flag); |
| 154 | } |
| 155 | |
| 156 | /** Helper for setFlags(), setting or clearing the kLinearText_Flag bit |
| 157 | @param linearText true to set the linearText bit in the paint's flags, |
| 158 | false to clear it. |
| 159 | */ |
| 160 | void setLinearText(bool linearText); |
| 161 | |
| 162 | /** Helper for getFlags(), returning true if kSubpixelText_Flag bit is set |
| 163 | @return true if the lineartext bit is set in the paint's flags |
| 164 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 165 | bool isSubpixelText() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 166 | return SkToBool(this->getFlags() & kSubpixelText_Flag); |
| 167 | } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 168 | |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 169 | /** Helper for setFlags(), setting or clearing the kSubpixelText_Flag |
| 170 | bit @param subpixelText true to set the subpixelText bit in the paint's flags, |
| 171 | false to clear it. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 172 | */ |
| 173 | void setSubpixelText(bool subpixelText); |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 174 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 175 | bool isLCDRenderText() const { |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 176 | return SkToBool(this->getFlags() & kLCDRenderText_Flag); |
| 177 | } |
| 178 | |
| 179 | /** Helper for setFlags(), setting or clearing the kLCDRenderText_Flag bit |
| 180 | @param subpixelRender true to set the subpixelRenderText bit in the paint's flags, |
| 181 | false to clear it. |
| 182 | */ |
| 183 | void setLCDRenderText(bool subpixelRender); |
| 184 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 185 | bool isEmbeddedBitmapText() const { |
agl@chromium.org | e95c91e | 2010-01-04 18:27:55 +0000 | [diff] [blame] | 186 | return SkToBool(this->getFlags() & kEmbeddedBitmapText_Flag); |
| 187 | } |
| 188 | |
| 189 | /** Helper for setFlags(), setting or clearing the kEmbeddedBitmapText_Flag bit |
| 190 | @param useEmbeddedBitmapText true to set the kEmbeddedBitmapText bit in the paint's flags, |
| 191 | false to clear it. |
| 192 | */ |
| 193 | void setEmbeddedBitmapText(bool useEmbeddedBitmapText); |
| 194 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 195 | bool isAutohinted() const { |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 196 | return SkToBool(this->getFlags() & kAutoHinting_Flag); |
| 197 | } |
| 198 | |
| 199 | /** Helper for setFlags(), setting or clearing the kAutoHinting_Flag bit |
| 200 | @param useAutohinter true to set the kEmbeddedBitmapText bit in the |
| 201 | paint's flags, |
| 202 | false to clear it. |
| 203 | */ |
| 204 | void setAutohinted(bool useAutohinter); |
| 205 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 206 | /** Helper for getFlags(), returning true if kUnderlineText_Flag bit is set |
| 207 | @return true if the underlineText bit is set in the paint's flags. |
| 208 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 209 | bool isUnderlineText() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 210 | return SkToBool(this->getFlags() & kUnderlineText_Flag); |
| 211 | } |
| 212 | |
| 213 | /** Helper for setFlags(), setting or clearing the kUnderlineText_Flag bit |
| 214 | @param underlineText true to set the underlineText bit in the paint's |
| 215 | flags, false to clear it. |
| 216 | */ |
| 217 | void setUnderlineText(bool underlineText); |
| 218 | |
| 219 | /** Helper for getFlags(), returns true if kStrikeThruText_Flag bit is set |
| 220 | @return true if the strikeThruText bit is set in the paint's flags. |
| 221 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 222 | bool isStrikeThruText() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 223 | return SkToBool(this->getFlags() & kStrikeThruText_Flag); |
| 224 | } |
| 225 | |
| 226 | /** Helper for setFlags(), setting or clearing the kStrikeThruText_Flag bit |
| 227 | @param strikeThruText true to set the strikeThruText bit in the |
| 228 | paint's flags, false to clear it. |
| 229 | */ |
| 230 | void setStrikeThruText(bool strikeThruText); |
| 231 | |
| 232 | /** Helper for getFlags(), returns true if kFakeBoldText_Flag bit is set |
| 233 | @return true if the kFakeBoldText_Flag bit is set in the paint's flags. |
| 234 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 235 | bool isFakeBoldText() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 236 | return SkToBool(this->getFlags() & kFakeBoldText_Flag); |
| 237 | } |
| 238 | |
| 239 | /** Helper for setFlags(), setting or clearing the kFakeBoldText_Flag bit |
| 240 | @param fakeBoldText true to set the kFakeBoldText_Flag bit in the paint's |
| 241 | flags, false to clear it. |
| 242 | */ |
| 243 | void setFakeBoldText(bool fakeBoldText); |
| 244 | |
| 245 | /** Helper for getFlags(), returns true if kDevKernText_Flag bit is set |
| 246 | @return true if the kernText bit is set in the paint's flags. |
| 247 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 248 | bool isDevKernText() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 249 | return SkToBool(this->getFlags() & kDevKernText_Flag); |
| 250 | } |
| 251 | |
| 252 | /** Helper for setFlags(), setting or clearing the kKernText_Flag bit |
| 253 | @param kernText true to set the kKernText_Flag bit in the paint's |
| 254 | flags, false to clear it. |
| 255 | */ |
| 256 | void setDevKernText(bool devKernText); |
| 257 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 258 | bool isFilterBitmap() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 259 | return SkToBool(this->getFlags() & kFilterBitmap_Flag); |
| 260 | } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 261 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 262 | void setFilterBitmap(bool filterBitmap); |
| 263 | |
| 264 | /** Styles apply to rect, oval, path, and text. |
| 265 | Bitmaps are always drawn in "fill", and lines are always drawn in |
| 266 | "stroke". |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 267 | |
reed@android.com | ed881c2 | 2009-09-15 14:10:42 +0000 | [diff] [blame] | 268 | Note: strokeandfill implicitly draws the result with |
| 269 | SkPath::kWinding_FillType, so if the original path is even-odd, the |
| 270 | results may not appear the same as if it was drawn twice, filled and |
| 271 | then stroked. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 272 | */ |
| 273 | enum Style { |
reed@android.com | ed881c2 | 2009-09-15 14:10:42 +0000 | [diff] [blame] | 274 | kFill_Style, //!< fill the geometry |
| 275 | kStroke_Style, //!< stroke the geometry |
| 276 | kStrokeAndFill_Style, //!< fill and stroke the geometry |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 277 | |
| 278 | kStyleCount, |
| 279 | }; |
| 280 | |
| 281 | /** Return the paint's style, used for controlling how primitives' |
| 282 | geometries are interpreted (except for drawBitmap, which always assumes |
| 283 | kFill_Style). |
| 284 | @return the paint's Style |
| 285 | */ |
| 286 | Style getStyle() const { return (Style)fStyle; } |
| 287 | |
| 288 | /** Set the paint's style, used for controlling how primitives' |
| 289 | geometries are interpreted (except for drawBitmap, which always assumes |
| 290 | Fill). |
| 291 | @param style The new style to set in the paint |
| 292 | */ |
| 293 | void setStyle(Style style); |
| 294 | |
| 295 | /** Return the paint's color. Note that the color is a 32bit value |
| 296 | containing alpha as well as r,g,b. This 32bit value is not |
| 297 | premultiplied, meaning that its alpha can be any value, regardless of |
| 298 | the values of r,g,b. |
| 299 | @return the paint's color (and alpha). |
| 300 | */ |
| 301 | SkColor getColor() const { return fColor; } |
| 302 | |
| 303 | /** Set the paint's color. Note that the color is a 32bit value containing |
| 304 | alpha as well as r,g,b. This 32bit value is not premultiplied, meaning |
| 305 | that its alpha can be any value, regardless of the values of r,g,b. |
| 306 | @param color The new color (including alpha) to set in the paint. |
| 307 | */ |
| 308 | void setColor(SkColor color); |
| 309 | |
| 310 | /** Helper to getColor() that just returns the color's alpha value. |
| 311 | @return the alpha component of the paint's color. |
| 312 | */ |
| 313 | uint8_t getAlpha() const { return SkToU8(SkColorGetA(fColor)); } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 314 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 315 | /** Helper to setColor(), that only assigns the color's alpha value, |
| 316 | leaving its r,g,b values unchanged. |
| 317 | @param a set the alpha component (0..255) of the paint's color. |
| 318 | */ |
| 319 | void setAlpha(U8CPU a); |
| 320 | |
| 321 | /** Helper to setColor(), that takes a,r,g,b and constructs the color value |
| 322 | using SkColorSetARGB() |
| 323 | @param a The new alpha component (0..255) of the paint's color. |
| 324 | @param r The new red component (0..255) of the paint's color. |
| 325 | @param g The new green component (0..255) of the paint's color. |
| 326 | @param b The new blue component (0..255) of the paint's color. |
| 327 | */ |
| 328 | void setARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b); |
| 329 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 330 | /** Return the width for stroking. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 331 | <p /> |
| 332 | A value of 0 strokes in hairline mode. |
| 333 | Hairlines always draw 1-pixel wide, regardless of the matrix. |
| 334 | @return the paint's stroke width, used whenever the paint's style is |
| 335 | Stroke or StrokeAndFill. |
| 336 | */ |
| 337 | SkScalar getStrokeWidth() const { return fWidth; } |
| 338 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 339 | /** Set the width for stroking. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 340 | Pass 0 to stroke in hairline mode. |
| 341 | Hairlines always draw 1-pixel wide, regardless of the matrix. |
| 342 | @param width set the paint's stroke width, used whenever the paint's |
| 343 | style is Stroke or StrokeAndFill. |
| 344 | */ |
| 345 | void setStrokeWidth(SkScalar width); |
| 346 | |
| 347 | /** Return the paint's stroke miter value. This is used to control the |
| 348 | behavior of miter joins when the joins angle is sharp. |
| 349 | @return the paint's miter limit, used whenever the paint's style is |
| 350 | Stroke or StrokeAndFill. |
| 351 | */ |
| 352 | SkScalar getStrokeMiter() const { return fMiterLimit; } |
| 353 | |
| 354 | /** Set the paint's stroke miter value. This is used to control the |
| 355 | behavior of miter joins when the joins angle is sharp. This value must |
| 356 | be >= 0. |
| 357 | @param miter set the miter limit on the paint, used whenever the |
| 358 | paint's style is Stroke or StrokeAndFill. |
| 359 | */ |
| 360 | void setStrokeMiter(SkScalar miter); |
| 361 | |
| 362 | /** Cap enum specifies the settings for the paint's strokecap. This is the |
| 363 | treatment that is applied to the beginning and end of each non-closed |
| 364 | contour (e.g. lines). |
| 365 | */ |
| 366 | enum Cap { |
| 367 | kButt_Cap, //!< begin/end contours with no extension |
| 368 | kRound_Cap, //!< begin/end contours with a semi-circle extension |
| 369 | kSquare_Cap, //!< begin/end contours with a half square extension |
| 370 | |
| 371 | kCapCount, |
| 372 | kDefault_Cap = kButt_Cap |
| 373 | }; |
| 374 | |
| 375 | /** Join enum specifies the settings for the paint's strokejoin. This is |
| 376 | the treatment that is applied to corners in paths and rectangles. |
| 377 | */ |
| 378 | enum Join { |
| 379 | kMiter_Join, //!< connect path segments with a sharp join |
| 380 | kRound_Join, //!< connect path segments with a round join |
| 381 | kBevel_Join, //!< connect path segments with a flat bevel join |
| 382 | |
| 383 | kJoinCount, |
| 384 | kDefault_Join = kMiter_Join |
| 385 | }; |
| 386 | |
| 387 | /** Return the paint's stroke cap type, controlling how the start and end |
| 388 | of stroked lines and paths are treated. |
| 389 | @return the line cap style for the paint, used whenever the paint's |
| 390 | style is Stroke or StrokeAndFill. |
| 391 | */ |
| 392 | Cap getStrokeCap() const { return (Cap)fCapType; } |
| 393 | |
| 394 | /** Set the paint's stroke cap type. |
| 395 | @param cap set the paint's line cap style, used whenever the paint's |
| 396 | style is Stroke or StrokeAndFill. |
| 397 | */ |
| 398 | void setStrokeCap(Cap cap); |
| 399 | |
| 400 | /** Return the paint's stroke join type. |
| 401 | @return the paint's line join style, used whenever the paint's style is |
| 402 | Stroke or StrokeAndFill. |
| 403 | */ |
| 404 | Join getStrokeJoin() const { return (Join)fJoinType; } |
| 405 | |
| 406 | /** Set the paint's stroke join type. |
| 407 | @param join set the paint's line join style, used whenever the paint's |
| 408 | style is Stroke or StrokeAndFill. |
| 409 | */ |
| 410 | void setStrokeJoin(Join join); |
| 411 | |
| 412 | /** Applies any/all effects (patheffect, stroking) to src, returning the |
| 413 | result in dst. The result is that drawing src with this paint will be |
| 414 | the same as drawing dst with a default paint (at least from the |
| 415 | geometric perspective). |
| 416 | @param src input path |
| 417 | @param dst output path (may be the same as src) |
| 418 | @return true if the path should be filled, or false if it should be |
| 419 | drawn with a hairline (width == 0) |
| 420 | */ |
| 421 | bool getFillPath(const SkPath& src, SkPath* dst) const; |
| 422 | |
| 423 | /** Returns true if the current paint settings allow for fast computation of |
| 424 | bounds (i.e. there is nothing complex like a patheffect that would make |
| 425 | the bounds computation expensive. |
| 426 | */ |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 427 | bool canComputeFastBounds() const { |
| 428 | // use bit-or since no need for early exit |
| 429 | return (reinterpret_cast<uintptr_t>(this->getMaskFilter()) | |
| 430 | reinterpret_cast<uintptr_t>(this->getLooper()) | |
| 431 | reinterpret_cast<uintptr_t>(this->getRasterizer()) | |
| 432 | reinterpret_cast<uintptr_t>(this->getPathEffect())) == 0; |
| 433 | } |
| 434 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 435 | /** Only call this if canComputeFastBounds() returned true. This takes a |
| 436 | raw rectangle (the raw bounds of a shape), and adjusts it for stylistic |
| 437 | effects in the paint (e.g. stroking). If needed, it uses the storage |
| 438 | rect parameter. It returns the adjusted bounds that can then be used |
| 439 | for quickReject tests. |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 440 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 441 | The returned rect will either be orig or storage, thus the caller |
| 442 | should not rely on storage being set to the result, but should always |
| 443 | use the retured value. It is legal for orig and storage to be the same |
| 444 | rect. |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 445 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 446 | e.g. |
| 447 | if (paint.canComputeFastBounds()) { |
| 448 | SkRect r, storage; |
| 449 | path.computeBounds(&r, SkPath::kFast_BoundsType); |
| 450 | const SkRect& fastR = paint.computeFastBounds(r, &storage); |
| 451 | if (canvas->quickReject(fastR, ...)) { |
| 452 | // don't draw the path |
| 453 | } |
| 454 | } |
| 455 | */ |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 456 | const SkRect& computeFastBounds(const SkRect& orig, SkRect* storage) const { |
| 457 | return this->getStyle() == kFill_Style ? orig : |
| 458 | this->computeStrokeFastBounds(orig, storage); |
| 459 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 460 | |
| 461 | /** Get the paint's shader object. |
| 462 | <p /> |
| 463 | The shader's reference count is not affected. |
| 464 | @return the paint's shader (or NULL) |
| 465 | */ |
| 466 | SkShader* getShader() const { return fShader; } |
| 467 | |
| 468 | /** Set or clear the shader object. |
| 469 | <p /> |
| 470 | Pass NULL to clear any previous shader. |
| 471 | As a convenience, the parameter passed is also returned. |
| 472 | If a previous shader exists, its reference count is decremented. |
| 473 | If shader is not NULL, its reference count is incremented. |
| 474 | @param shader May be NULL. The shader to be installed in the paint |
| 475 | @return shader |
| 476 | */ |
| 477 | SkShader* setShader(SkShader* shader); |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 478 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 479 | /** Get the paint's colorfilter. If there is a colorfilter, its reference |
| 480 | count is not changed. |
| 481 | @return the paint's colorfilter (or NULL) |
| 482 | */ |
| 483 | SkColorFilter* getColorFilter() const { return fColorFilter; } |
| 484 | |
| 485 | /** Set or clear the paint's colorfilter, returning the parameter. |
| 486 | <p /> |
| 487 | If the paint already has a filter, its reference count is decremented. |
| 488 | If filter is not NULL, its reference count is incremented. |
| 489 | @param filter May be NULL. The filter to be installed in the paint |
| 490 | @return filter |
| 491 | */ |
| 492 | SkColorFilter* setColorFilter(SkColorFilter* filter); |
| 493 | |
| 494 | /** Get the paint's xfermode object. |
| 495 | <p /> |
| 496 | The xfermode's reference count is not affected. |
| 497 | @return the paint's xfermode (or NULL) |
| 498 | */ |
| 499 | SkXfermode* getXfermode() const { return fXfermode; } |
| 500 | |
| 501 | /** Set or clear the xfermode object. |
| 502 | <p /> |
| 503 | Pass NULL to clear any previous xfermode. |
| 504 | As a convenience, the parameter passed is also returned. |
| 505 | If a previous xfermode exists, its reference count is decremented. |
| 506 | If xfermode is not NULL, its reference count is incremented. |
| 507 | @param xfermode May be NULL. The new xfermode to be installed in the |
| 508 | paint |
| 509 | @return xfermode |
| 510 | */ |
| 511 | SkXfermode* setXfermode(SkXfermode* xfermode); |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 512 | |
| 513 | /** Create an xfermode based on the specified Mode, and assign it into the |
| 514 | paint, returning the mode that was set. If the Mode is SrcOver, then |
| 515 | the paint's xfermode is set to null. |
| 516 | */ |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 517 | SkXfermode* setXfermodeMode(SkXfermode::Mode); |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 518 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 519 | /** Get the paint's patheffect object. |
| 520 | <p /> |
| 521 | The patheffect reference count is not affected. |
| 522 | @return the paint's patheffect (or NULL) |
| 523 | */ |
| 524 | SkPathEffect* getPathEffect() const { return fPathEffect; } |
| 525 | |
| 526 | /** Set or clear the patheffect object. |
| 527 | <p /> |
| 528 | Pass NULL to clear any previous patheffect. |
| 529 | As a convenience, the parameter passed is also returned. |
| 530 | If a previous patheffect exists, its reference count is decremented. |
| 531 | If patheffect is not NULL, its reference count is incremented. |
| 532 | @param effect May be NULL. The new patheffect to be installed in the |
| 533 | paint |
| 534 | @return effect |
| 535 | */ |
| 536 | SkPathEffect* setPathEffect(SkPathEffect* effect); |
| 537 | |
| 538 | /** Get the paint's maskfilter object. |
| 539 | <p /> |
| 540 | The maskfilter reference count is not affected. |
| 541 | @return the paint's maskfilter (or NULL) |
| 542 | */ |
| 543 | SkMaskFilter* getMaskFilter() const { return fMaskFilter; } |
| 544 | |
| 545 | /** Set or clear the maskfilter object. |
| 546 | <p /> |
| 547 | Pass NULL to clear any previous maskfilter. |
| 548 | As a convenience, the parameter passed is also returned. |
| 549 | If a previous maskfilter exists, its reference count is decremented. |
| 550 | If maskfilter is not NULL, its reference count is incremented. |
| 551 | @param maskfilter May be NULL. The new maskfilter to be installed in |
| 552 | the paint |
| 553 | @return maskfilter |
| 554 | */ |
| 555 | SkMaskFilter* setMaskFilter(SkMaskFilter* maskfilter); |
| 556 | |
| 557 | // These attributes are for text/fonts |
| 558 | |
| 559 | /** Get the paint's typeface object. |
| 560 | <p /> |
| 561 | The typeface object identifies which font to use when drawing or |
| 562 | measuring text. The typeface reference count is not affected. |
| 563 | @return the paint's typeface (or NULL) |
| 564 | */ |
| 565 | SkTypeface* getTypeface() const { return fTypeface; } |
| 566 | |
| 567 | /** Set or clear the typeface object. |
| 568 | <p /> |
| 569 | Pass NULL to clear any previous typeface. |
| 570 | As a convenience, the parameter passed is also returned. |
| 571 | If a previous typeface exists, its reference count is decremented. |
| 572 | If typeface is not NULL, its reference count is incremented. |
| 573 | @param typeface May be NULL. The new typeface to be installed in the |
| 574 | paint |
| 575 | @return typeface |
| 576 | */ |
| 577 | SkTypeface* setTypeface(SkTypeface* typeface); |
| 578 | |
| 579 | /** Get the paint's rasterizer (or NULL). |
| 580 | <p /> |
| 581 | The raster controls how paths/text are turned into alpha masks. |
| 582 | @return the paint's rasterizer (or NULL) |
| 583 | */ |
| 584 | SkRasterizer* getRasterizer() const { return fRasterizer; } |
| 585 | |
| 586 | /** Set or clear the rasterizer object. |
| 587 | <p /> |
| 588 | Pass NULL to clear any previous rasterizer. |
| 589 | As a convenience, the parameter passed is also returned. |
| 590 | If a previous rasterizer exists in the paint, its reference count is |
| 591 | decremented. If rasterizer is not NULL, its reference count is |
| 592 | incremented. |
| 593 | @param rasterizer May be NULL. The new rasterizer to be installed in |
| 594 | the paint. |
| 595 | @return rasterizer |
| 596 | */ |
| 597 | SkRasterizer* setRasterizer(SkRasterizer* rasterizer); |
| 598 | |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 599 | /** |
| 600 | * Return the paint's SkDrawLooper (if any). Does not affect the looper's |
| 601 | * reference count. |
| 602 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 603 | SkDrawLooper* getLooper() const { return fLooper; } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 604 | |
| 605 | /** |
| 606 | * Set or clear the looper object. |
| 607 | * <p /> |
| 608 | * Pass NULL to clear any previous looper. |
| 609 | * As a convenience, the parameter passed is also returned. |
| 610 | * If a previous looper exists in the paint, its reference count is |
| 611 | * decremented. If looper is not NULL, its reference count is |
| 612 | * incremented. |
| 613 | * @param looper May be NULL. The new looper to be installed in the paint. |
| 614 | * @return looper |
| 615 | */ |
| 616 | SkDrawLooper* setLooper(SkDrawLooper* looper); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 617 | |
| 618 | enum Align { |
| 619 | kLeft_Align, |
| 620 | kCenter_Align, |
| 621 | kRight_Align, |
| 622 | |
| 623 | kAlignCount |
| 624 | }; |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 625 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 626 | /** Return the paint's Align value for drawing text. |
| 627 | @return the paint's Align value for drawing text. |
| 628 | */ |
| 629 | Align getTextAlign() const { return (Align)fTextAlign; } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 630 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 631 | /** Set the paint's text alignment. |
| 632 | @param align set the paint's Align value for drawing text. |
| 633 | */ |
| 634 | void setTextAlign(Align align); |
| 635 | |
| 636 | /** Return the paint's text size. |
| 637 | @return the paint's text size. |
| 638 | */ |
| 639 | SkScalar getTextSize() const { return fTextSize; } |
| 640 | |
| 641 | /** Set the paint's text size. This value must be > 0 |
| 642 | @param textSize set the paint's text size. |
| 643 | */ |
| 644 | void setTextSize(SkScalar textSize); |
| 645 | |
| 646 | /** Return the paint's horizontal scale factor for text. The default value |
| 647 | is 1.0. |
| 648 | @return the paint's scale factor in X for drawing/measuring text |
| 649 | */ |
| 650 | SkScalar getTextScaleX() const { return fTextScaleX; } |
| 651 | |
| 652 | /** Set the paint's horizontal scale factor for text. The default value |
| 653 | is 1.0. Values > 1.0 will stretch the text wider. Values < 1.0 will |
| 654 | stretch the text narrower. |
| 655 | @param scaleX set the paint's scale factor in X for drawing/measuring |
| 656 | text. |
| 657 | */ |
| 658 | void setTextScaleX(SkScalar scaleX); |
| 659 | |
| 660 | /** Return the paint's horizontal skew factor for text. The default value |
| 661 | is 0. |
| 662 | @return the paint's skew factor in X for drawing text. |
| 663 | */ |
| 664 | SkScalar getTextSkewX() const { return fTextSkewX; } |
| 665 | |
| 666 | /** Set the paint's horizontal skew factor for text. The default value |
| 667 | is 0. For approximating oblique text, use values around -0.25. |
| 668 | @param skewX set the paint's skew factor in X for drawing text. |
| 669 | */ |
| 670 | void setTextSkewX(SkScalar skewX); |
| 671 | |
| 672 | /** Describes how to interpret the text parameters that are passed to paint |
| 673 | methods like measureText() and getTextWidths(). |
| 674 | */ |
| 675 | enum TextEncoding { |
| 676 | kUTF8_TextEncoding, //!< the text parameters are UTF8 |
| 677 | kUTF16_TextEncoding, //!< the text parameters are UTF16 |
| 678 | kGlyphID_TextEncoding //!< the text parameters are glyph indices |
| 679 | }; |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 680 | |
| 681 | TextEncoding getTextEncoding() const { return (TextEncoding)fTextEncoding; } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 682 | |
| 683 | void setTextEncoding(TextEncoding encoding); |
| 684 | |
| 685 | struct FontMetrics { |
| 686 | SkScalar fTop; //!< The greatest distance above the baseline for any glyph (will be <= 0) |
| 687 | SkScalar fAscent; //!< The recommended distance above the baseline (will be <= 0) |
| 688 | SkScalar fDescent; //!< The recommended distance below the baseline (will be >= 0) |
| 689 | SkScalar fBottom; //!< The greatest distance below the baseline for any glyph (will be >= 0) |
| 690 | SkScalar fLeading; //!< The recommended distance to add between lines of text (will be >= 0) |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 691 | SkScalar fAvgCharWidth; //!< the average charactor width (>= 0) |
| 692 | SkScalar fXMin; //!< The minimum bounding box x value for all glyphs |
| 693 | SkScalar fXMax; //!< The maximum bounding box x value for all glyphs |
| 694 | SkScalar fXHeight; //!< the height of an 'x' in px, or 0 if no 'x' in face |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 695 | }; |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 696 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 697 | /** Return the recommend spacing between lines (which will be |
| 698 | fDescent - fAscent + fLeading). |
| 699 | If metrics is not null, return in it the font metrics for the |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 700 | typeface/pointsize/etc. currently set in the paint. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 701 | @param metrics If not null, returns the font metrics for the |
| 702 | current typeface/pointsize/etc setting in this |
| 703 | paint. |
| 704 | @param scale If not 0, return width as if the canvas were scaled |
| 705 | by this value |
| 706 | @param return the recommended spacing between lines |
| 707 | */ |
| 708 | SkScalar getFontMetrics(FontMetrics* metrics, SkScalar scale = 0) const; |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 709 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 710 | /** Return the recommend line spacing. This will be |
| 711 | fDescent - fAscent + fLeading |
| 712 | */ |
| 713 | SkScalar getFontSpacing() const { return this->getFontMetrics(NULL, 0); } |
| 714 | |
| 715 | /** Convert the specified text into glyph IDs, returning the number of |
| 716 | glyphs ID written. If glyphs is NULL, it is ignore and only the count |
| 717 | is returned. |
| 718 | */ |
| 719 | int textToGlyphs(const void* text, size_t byteLength, |
| 720 | uint16_t glyphs[]) const; |
| 721 | |
reed@android.com | a5dcaf6 | 2010-02-05 17:12:32 +0000 | [diff] [blame] | 722 | /** Return true if all of the specified text has a corresponding non-zero |
| 723 | glyph ID. If any of the code-points in the text are not supported in |
| 724 | the typeface (i.e. the glyph ID would be zero), then return false. |
| 725 | |
| 726 | If the text encoding for the paint is kGlyph_TextEncoding, then this |
| 727 | returns true if all of the specified glyph IDs are non-zero. |
| 728 | */ |
| 729 | bool containsText(const void* text, size_t byteLength) const; |
| 730 | |
reed@android.com | 9d3a985 | 2010-01-08 14:07:42 +0000 | [diff] [blame] | 731 | /** Convert the glyph array into Unichars. Unconvertable glyphs are mapped |
| 732 | to zero. Note: this does not look at the text-encoding setting in the |
| 733 | paint, only at the typeface. |
| 734 | */ |
| 735 | void glyphsToUnichars(const uint16_t glyphs[], int count, |
| 736 | SkUnichar text[]) const; |
| 737 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 738 | /** Return the number of drawable units in the specified text buffer. |
| 739 | This looks at the current TextEncoding field of the paint. If you also |
| 740 | want to have the text converted into glyph IDs, call textToGlyphs |
| 741 | instead. |
| 742 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 743 | int countText(const void* text, size_t byteLength) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 744 | return this->textToGlyphs(text, byteLength, NULL); |
| 745 | } |
| 746 | |
| 747 | /** Return the width of the text. |
| 748 | @param text The text to be measured |
| 749 | @param length Number of bytes of text to measure |
| 750 | @param bounds If not NULL, returns the bounds of the text, |
| 751 | relative to (0, 0). |
| 752 | @param scale If not 0, return width as if the canvas were scaled |
| 753 | by this value |
| 754 | @return The advance width of the text |
| 755 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 756 | SkScalar measureText(const void* text, size_t length, |
| 757 | SkRect* bounds, SkScalar scale = 0) const; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 758 | |
| 759 | /** Return the width of the text. |
| 760 | @param text Address of the text |
| 761 | @param length Number of bytes of text to measure |
| 762 | @return The width of the text |
| 763 | */ |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 764 | SkScalar measureText(const void* text, size_t length) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 765 | return this->measureText(text, length, NULL, 0); |
| 766 | } |
reed@google.com | 9d07fec | 2011-03-16 20:02:59 +0000 | [diff] [blame] | 767 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 768 | /** Specify the direction the text buffer should be processed in breakText() |
| 769 | */ |
| 770 | enum TextBufferDirection { |
| 771 | /** When measuring text for breakText(), begin at the start of the text |
| 772 | buffer and proceed forward through the data. This is the default. |
| 773 | */ |
| 774 | kForward_TextBufferDirection, |
| 775 | /** When measuring text for breakText(), begin at the end of the text |
| 776 | buffer and proceed backwards through the data. |
| 777 | */ |
| 778 | kBackward_TextBufferDirection |
| 779 | }; |
| 780 | |
| 781 | /** Return the width of the text. |
| 782 | @param text The text to be measured |
| 783 | @param length Number of bytes of text to measure |
| 784 | @param maxWidth Maximum width. Only the subset of text whose accumulated |
| 785 | widths are <= maxWidth are measured. |
| 786 | @param measuredWidth Optional. If non-null, this returns the actual |
| 787 | width of the measured text. |
| 788 | @param tbd Optional. The direction the text buffer should be |
| 789 | traversed during measuring. |
| 790 | @return The number of bytes of text that were measured. Will be |
| 791 | <= length. |
| 792 | */ |
| 793 | size_t breakText(const void* text, size_t length, SkScalar maxWidth, |
| 794 | SkScalar* measuredWidth = NULL, |
| 795 | TextBufferDirection tbd = kForward_TextBufferDirection) |
| 796 | const; |
| 797 | |
| 798 | /** Return the advance widths for the characters in the string. |
| 799 | @param text the text |
| 800 | @param byteLength number of bytes to of text |
| 801 | @param widths If not null, returns the array of advance widths of |
| 802 | the glyphs. If not NULL, must be at least a large |
| 803 | as the number of unichars in the specified text. |
| 804 | @param bounds If not null, returns the bounds for each of |
| 805 | character, relative to (0, 0) |
| 806 | @return the number of unichars in the specified text. |
| 807 | */ |
| 808 | int getTextWidths(const void* text, size_t byteLength, SkScalar widths[], |
| 809 | SkRect bounds[] = NULL) const; |
| 810 | |
| 811 | /** Return the path (outline) for the specified text. |
| 812 | Note: just like SkCanvas::drawText, this will respect the Align setting |
| 813 | in the paint. |
| 814 | */ |
| 815 | void getTextPath(const void* text, size_t length, SkScalar x, SkScalar y, |
| 816 | SkPath* path) const; |
| 817 | |
djsollen@google.com | f5dbe2f | 2011-04-15 13:41:26 +0000 | [diff] [blame^] | 818 | #ifdef ANDROID |
| 819 | const SkGlyph& getUnicharMetrics(SkUnichar); |
| 820 | const void* findImage(const SkGlyph&); |
| 821 | |
| 822 | uint32_t getGenerationID() const; |
| 823 | #endif |
| 824 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 825 | private: |
| 826 | SkTypeface* fTypeface; |
| 827 | SkScalar fTextSize; |
| 828 | SkScalar fTextScaleX; |
| 829 | SkScalar fTextSkewX; |
| 830 | |
| 831 | SkPathEffect* fPathEffect; |
| 832 | SkShader* fShader; |
| 833 | SkXfermode* fXfermode; |
| 834 | SkMaskFilter* fMaskFilter; |
| 835 | SkColorFilter* fColorFilter; |
| 836 | SkRasterizer* fRasterizer; |
| 837 | SkDrawLooper* fLooper; |
| 838 | |
| 839 | SkColor fColor; |
| 840 | SkScalar fWidth; |
| 841 | SkScalar fMiterLimit; |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 842 | unsigned fFlags : 12; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 843 | unsigned fTextAlign : 2; |
| 844 | unsigned fCapType : 2; |
| 845 | unsigned fJoinType : 2; |
| 846 | unsigned fStyle : 2; |
| 847 | unsigned fTextEncoding : 2; // 3 values |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 848 | unsigned fHinting : 2; |
djsollen@google.com | f5dbe2f | 2011-04-15 13:41:26 +0000 | [diff] [blame^] | 849 | #ifdef ANDROID |
| 850 | uint32_t fGenerationID; |
| 851 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 852 | |
| 853 | SkDrawCacheProc getDrawCacheProc() const; |
| 854 | SkMeasureCacheProc getMeasureCacheProc(TextBufferDirection dir, |
| 855 | bool needFullMetrics) const; |
| 856 | |
| 857 | SkScalar measure_text(SkGlyphCache*, const char* text, size_t length, |
| 858 | int* count, SkRect* bounds) const; |
| 859 | |
| 860 | SkGlyphCache* detachCache(const SkMatrix*) const; |
| 861 | |
| 862 | void descriptorProc(const SkMatrix* deviceMatrix, |
| 863 | void (*proc)(const SkDescriptor*, void*), |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 864 | void* context, bool ignoreGamma = false) const; |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 865 | |
| 866 | const SkRect& computeStrokeFastBounds(const SkRect& orig, |
| 867 | SkRect* storage) const; |
| 868 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 869 | enum { |
| 870 | kCanonicalTextSizeForPaths = 64 |
| 871 | }; |
vandebo@chromium.org | 28be72b | 2010-11-11 21:37:00 +0000 | [diff] [blame] | 872 | friend class SkAutoGlyphCache; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 873 | friend class SkCanvas; |
| 874 | friend class SkDraw; |
vandebo@chromium.org | 28be72b | 2010-11-11 21:37:00 +0000 | [diff] [blame] | 875 | friend class SkPDFDevice; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 876 | friend class SkTextToPathIter; |
| 877 | }; |
| 878 | |
| 879 | ////////////////////////////////////////////////////////////////////////// |
| 880 | |
| 881 | #include "SkPathEffect.h" |
| 882 | |
| 883 | /** \class SkStrokePathEffect |
| 884 | |
| 885 | SkStrokePathEffect simulates stroking inside a patheffect, allowing the |
| 886 | caller to have explicit control of when to stroke a path. Typically this is |
| 887 | used if the caller wants to stroke before another patheffect is applied |
| 888 | (using SkComposePathEffect or SkSumPathEffect). |
| 889 | */ |
| 890 | class SkStrokePathEffect : public SkPathEffect { |
| 891 | public: |
| 892 | SkStrokePathEffect(const SkPaint&); |
| 893 | SkStrokePathEffect(SkScalar width, SkPaint::Style, SkPaint::Join, |
| 894 | SkPaint::Cap, SkScalar miterLimit = -1); |
| 895 | |
| 896 | // overrides |
| 897 | // This method is not exported to java. |
| 898 | virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width); |
| 899 | |
| 900 | // overrides for SkFlattenable |
| 901 | // This method is not exported to java. |
| 902 | virtual void flatten(SkFlattenableWriteBuffer&); |
| 903 | // This method is not exported to java. |
| 904 | virtual Factory getFactory(); |
| 905 | |
| 906 | private: |
| 907 | SkScalar fWidth, fMiter; |
| 908 | uint8_t fStyle, fJoin, fCap; |
| 909 | |
| 910 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer&); |
| 911 | SkStrokePathEffect(SkFlattenableReadBuffer&); |
| 912 | |
| 913 | typedef SkPathEffect INHERITED; |
| 914 | |
| 915 | // illegal |
| 916 | SkStrokePathEffect(const SkStrokePathEffect&); |
| 917 | SkStrokePathEffect& operator=(const SkStrokePathEffect&); |
| 918 | }; |
| 919 | |
| 920 | #endif |
| 921 | |