1 #ifndef __DALI_PIXEL_H__
2 #define __DALI_PIXEL_H__
5 * Copyright (c) 2016 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/public-api/common/dali-common.h>
27 * @addtogroup dali_core_images
32 * @brief Pixel format types and their properties.
37 * @brief Pixel formats
39 * @note: BufferImage::Update might not work with BGR/BGRA formats!
41 enum Format ///< pixel format, default color depth is RGBA 32 bit with alpha
43 INVALID = 0, ///< Used to represent an unsupported format. @since 1.1.17
45 // Start at > 0 to distinguish null data:
46 A8 = 1, ///< color depth 8-bit, alpha
47 L8, ///< color depth 8-bit, luminance
48 LA88, ///< color depth 16-bit, luminance with 8 bit alpha
49 RGB565, ///< color depth 16 bit, 5-6-5
50 BGR565, ///< color depth 16 bit, 5-6-5
51 RGBA4444, ///< color depth 16 bit with alpha, 4-4-4-4
52 BGRA4444, ///< color depth 16 bit with alpha, 4-4-4-4
53 RGBA5551, ///< color depth 16 bit with alpha, 5-5-5-1
54 BGRA5551, ///< color depth 16 bit with alpha, 5-5-5-1
55 RGB888, ///< color depth 24 bit, 8-8-8
56 RGB8888, ///< color depth 32 bit, alpha is reserved but not used, 8-8-8-8#
57 BGR8888, ///< color depth 32 bit, alpha is reserved but not used, 8-8-8-8#
58 RGBA8888, ///< color depth 32 bit with alpha, 8-8-8-8
59 BGRA8888, ///< color depth 32 bit with alpha, 8-8-8-8
61 // GLES 3 Standard compressed formats:
62 COMPRESSED_R11_EAC, ///< ETC2 / EAC single-channel, unsigned
63 COMPRESSED_SIGNED_R11_EAC, ///< ETC2 / EAC single-channel, signed
64 COMPRESSED_RG11_EAC, ///< ETC2 / EAC dual-channel, unsigned
65 COMPRESSED_SIGNED_RG11_EAC, ///< ETC2 / EAC dual-channel, signed
66 COMPRESSED_RGB8_ETC2, ///< ETC2 / EAC RGB
67 COMPRESSED_SRGB8_ETC2, ///< ETC2 / EAC RGB using sRGB colourspace.
68 COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, ///< ETC2 / EAC RGB with single bit per pixel alpha mask.
69 COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2,///< ETC2 / EAC RGB using sRGB colourspace, with single bit per pixel alpha mask.
70 COMPRESSED_RGBA8_ETC2_EAC, ///< ETC2 / EAC RGB plus separate alpha channel.
71 COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, ///< ETC2 / EAC RGB using sRGB colourspace, plus separate alpha channel.
73 // GLES 2 extension compressed formats:
74 COMPRESSED_RGB8_ETC1, ///< ETC1 RGB as defined by GLES 2 extension OES_compressed_ETC1_RGB8_texture: http://www.khronos.org/registry/gles/extensions/OES/OES_compressed_ETC1_RGB8_texture.txt
75 COMPRESSED_RGB_PVRTC_4BPPV1, ///< PowerVR 4bpp RGB format (v1) as defined by extension IMG_texture_compression_pvrtc: http://www.khronos.org/registry/gles/extensions/IMG/IMG_texture_compression_pvrtc.txt
77 // GLES 3.1 compressed formats:
78 COMPRESSED_RGBA_ASTC_4x4_KHR, ///< ASTC Linear color space with a 4x4 block-size. @since 1.1.17
79 COMPRESSED_RGBA_ASTC_5x4_KHR, ///< ASTC Linear color space with a 5x4 block-size. @since 1.1.17
80 COMPRESSED_RGBA_ASTC_5x5_KHR, ///< ASTC Linear color space with a 5x5 block-size. @since 1.1.17
81 COMPRESSED_RGBA_ASTC_6x5_KHR, ///< ASTC Linear color space with a 6x5 block-size. @since 1.1.17
82 COMPRESSED_RGBA_ASTC_6x6_KHR, ///< ASTC Linear color space with a 6x6 block-size. @since 1.1.17
83 COMPRESSED_RGBA_ASTC_8x5_KHR, ///< ASTC Linear color space with a 8x5 block-size. @since 1.1.17
84 COMPRESSED_RGBA_ASTC_8x6_KHR, ///< ASTC Linear color space with a 8x6 block-size. @since 1.1.17
85 COMPRESSED_RGBA_ASTC_8x8_KHR, ///< ASTC Linear color space with a 8x8 block-size. @since 1.1.17
86 COMPRESSED_RGBA_ASTC_10x5_KHR, ///< ASTC Linear color space with a 10x5 block-size. @since 1.1.17
87 COMPRESSED_RGBA_ASTC_10x6_KHR, ///< ASTC Linear color space with a 10x6 block-size. @since 1.1.17
88 COMPRESSED_RGBA_ASTC_10x8_KHR, ///< ASTC Linear color space with a 10x8 block-size. @since 1.1.17
89 COMPRESSED_RGBA_ASTC_10x10_KHR, ///< ASTC Linear color space with a 10x10 block-size. @since 1.1.17
90 COMPRESSED_RGBA_ASTC_12x10_KHR, ///< ASTC Linear color space with a 12x10 block-size. @since 1.1.17
91 COMPRESSED_RGBA_ASTC_12x12_KHR, ///< ASTC Linear color space with a 12x12 block-size. @since 1.1.17
92 COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 4x4 block-size. @since 1.1.17
93 COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 5x4 block-size. @since 1.1.17
94 COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 5x5 block-size. @since 1.1.17
95 COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 6x5 block-size. @since 1.1.17
96 COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 6x6 block-size. @since 1.1.17
97 COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 8x5 block-size. @since 1.1.17
98 COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 8x6 block-size. @since 1.1.17
99 COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 8x8 block-size. @since 1.1.17
100 COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 10x5 block-size. @since 1.1.17
101 COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 10x6 block-size. @since 1.1.17
102 COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 10x8 block-size. @since 1.1.17
103 COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 10x10 block-size. @since 1.1.17
104 COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 12x10 block-size. @since 1.1.17
105 COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR, ///< ASTC Non-linear (gamma-corrected) color space with a 12x12 block-size. @since 1.1.17
107 ///! Update LAST_VALID_PIXEL_FORMAT below if you add an enum value here.
111 * @brief For asserting that a variable has a valid pixel format.
113 * Sync it to the first value above.
115 const Format FIRST_VALID_PIXEL_FORMAT = A8;
118 * @brief For asserting that a variable has a valid pixel format.
120 * Sync it to the last value above.
122 const Format LAST_VALID_PIXEL_FORMAT = COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR;
125 * @brief Whether specified pixel format contains an alpha value.
127 * @param [in] pixelformat pixel format
128 * @return true if format has alpha, false otherwise
130 DALI_IMPORT_API bool HasAlpha(Format pixelformat);
133 * @brief Returns The number of bytes per pixel for the specified pixel format.
135 * @param [in] pixelFormat The pixel format
136 * @return The number of bytes per pixel
138 DALI_IMPORT_API unsigned int GetBytesPerPixel(Format pixelFormat);
141 * @brief Returns the offset of the byte containing the alpha value from the start of the pixel data
142 * and the bitmask of that byte to get the alpha value.
143 * For example, in case of RGBA4444, byteOffset value is 1 and bitMask value is 0x0f.
144 * It means the second byte contains the alpha value and the last 4 bits of the byte is the alpha value.
146 * Bitmask is zero if the pixelFormat does not support alpha
147 * @param[in] pixelFormat the pixel format
148 * @param[out] byteOffset the byte offset of the byte containing the alpha value
149 * @param[out] bitMask the bitmask of the byte to get the alpha value
151 DALI_IMPORT_API void GetAlphaOffsetAndMask(Format pixelFormat, int& byteOffset, int& bitMask);
160 #endif // __DALI_PIXEL_H__