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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkBitmap_DEFINED | 10 #ifndef SkBitmap_DEFINED |
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31 The SkBitmap class specifies a raster bitmap. A bitmap has an integer width | 31 The SkBitmap class specifies a raster bitmap. A bitmap has an integer width |
32 and height, and a format (config), and a pointer to the actual pixels. | 32 and height, and a format (config), and a pointer to the actual pixels. |
33 Bitmaps can be drawn into a SkCanvas, but they are also used to specify the | 33 Bitmaps can be drawn into a SkCanvas, but they are also used to specify the |
34 target of a SkCanvas' drawing operations. | 34 target of a SkCanvas' drawing operations. |
35 A const SkBitmap exposes getAddr(), which lets a caller write its pixels; | 35 A const SkBitmap exposes getAddr(), which lets a caller write its pixels; |
36 the constness is considered to apply to the bitmap's configuration, not | 36 the constness is considered to apply to the bitmap's configuration, not |
37 its contents. | 37 its contents. |
38 */ | 38 */ |
39 class SK_API SkBitmap { | 39 class SK_API SkBitmap { |
40 public: | 40 public: |
41 class Allocator; | 41 class SK_API Allocator; |
42 | 42 |
43 enum Config { | 43 enum Config { |
44 kNo_Config, //!< bitmap has not been configured | 44 kNo_Config, //!< bitmap has not been configured |
45 /** | 45 /** |
46 * 1-bit per pixel, (0 is transparent, 1 is opaque) | 46 * 1-bit per pixel, (0 is transparent, 1 is opaque) |
47 * Valid as a destination (target of a canvas), but not valid as a src. | 47 * Valid as a destination (target of a canvas), but not valid as a src. |
48 * i.e. you can draw into a 1-bit bitmap, but you cannot draw from one. | 48 * i.e. you can draw into a 1-bit bitmap, but you cannot draw from one. |
49 */ | 49 */ |
50 kA1_Config, | 50 kA1_Config, |
51 kA8_Config, //!< 8-bits per pixel, with only alpha specified (0
is transparent, 0xFF is opaque) | 51 kA8_Config, //!< 8-bits per pixel, with only alpha specified (0
is transparent, 0xFF is opaque) |
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820 | 820 |
821 // returns the address of the byte that contains the x coordinate | 821 // returns the address of the byte that contains the x coordinate |
822 inline uint8_t* SkBitmap::getAddr1(int x, int y) const { | 822 inline uint8_t* SkBitmap::getAddr1(int x, int y) const { |
823 SkASSERT(fPixels); | 823 SkASSERT(fPixels); |
824 SkASSERT(fConfig == kA1_Config); | 824 SkASSERT(fConfig == kA1_Config); |
825 SkASSERT((unsigned)x < fWidth && (unsigned)y < fHeight); | 825 SkASSERT((unsigned)x < fWidth && (unsigned)y < fHeight); |
826 return (uint8_t*)fPixels + y * fRowBytes + (x >> 3); | 826 return (uint8_t*)fPixels + y * fRowBytes + (x >> 3); |
827 } | 827 } |
828 | 828 |
829 #endif | 829 #endif |
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