1 #ifndef __DALI_PIXEL_H__
2 #define __DALI_PIXEL_H__
5 * Copyright (c) 2015 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>
28 * @brief Pixel format types and their properties.
33 * @brief Pixel formats
35 * @note: BufferImage::Update might not work with BGR/BGRA formats!
37 enum Format ///< pixel format, default color depth is RGBA 32 bit with alpha
39 // Start at > 0 to distinguish null data:
40 A8 = 1, ///< color depth 8-bit, alpha
41 L8, ///< color depth 8-bit, luminance
42 LA88, ///< color depth 16-bit, luminance with 8 bit alpha
43 RGB565, ///< color depth 16 bit, 5-6-5
44 BGR565, ///< color depth 16 bit, 5-6-5
45 RGBA4444, ///< color depth 16 bit with alpha, 4-4-4-4
46 BGRA4444, ///< color depth 16 bit with alpha, 4-4-4-4
47 RGBA5551, ///< color depth 16 bit with alpha, 5-5-5-1
48 BGRA5551, ///< color depth 16 bit with alpha, 5-5-5-1
49 RGB888, ///< color depth 24 bit, 8-8-8
50 RGB8888, ///< color depth 32 bit, alpha is reserved but not used, 8-8-8-8#
51 BGR8888, ///< color depth 32 bit, alpha is reserved but not used, 8-8-8-8#
52 RGBA8888, ///< color depth 32 bit with alpha, 8-8-8-8
53 BGRA8888, ///< color depth 32 bit with alpha, 8-8-8-8
54 // GLES 3 Standard compressed formats:
55 COMPRESSED_R11_EAC, ///< ETC2 / EAC single-channel, unsigned
56 COMPRESSED_SIGNED_R11_EAC, ///< ETC2 / EAC single-channel, signed
57 COMPRESSED_RG11_EAC, ///< ETC2 / EAC dual-channel, unsigned
58 COMPRESSED_SIGNED_RG11_EAC, ///< ETC2 / EAC dual-channel, signed
59 COMPRESSED_RGB8_ETC2, ///< ETC2 / EAC RGB
60 COMPRESSED_SRGB8_ETC2, ///< ETC2 / EAC RGB using sRGB colourspace.
61 COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, ///< ETC2 / EAC RGB with single bit per pixel alpha mask.
62 COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2,///< ETC2 / EAC RGB using sRGB colourspace, with single bit per pixel alpha mask.
63 COMPRESSED_RGBA8_ETC2_EAC, ///< ETC2 / EAC RGB plus separate alpha channel.
64 COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, ///< ETC2 / EAC RGB using sRGB colourspace, plus separate alpha channel.
65 // GLES 2 extension compressed formats:
66 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
67 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
68 ///! Update LAST_VALID_PIXEL_FORMAT below if you add an enum value here.
72 * @brief For asserting that a variable has a valid pixel format.
74 * Sync it to the first value above.
76 const Format FIRST_VALID_PIXEL_FORMAT = A8;
79 * @brief For asserting that a variable has a valid pixel format.
81 * Sync it to the last value above.
83 const Format LAST_VALID_PIXEL_FORMAT = COMPRESSED_RGB_PVRTC_4BPPV1;
86 * @brief Whether specified pixel format contains an alpha value.
88 * @param [in] pixelformat pixel format
89 * @return true if format has alpha, false otherwise
91 DALI_IMPORT_API bool HasAlpha(Format pixelformat);
94 * @brief Returns The number of bytes per pixel for the specified pixel format.
96 * @param [in] pixelFormat The pixel format
97 * @return The number of bytes per pixel
99 DALI_IMPORT_API unsigned int GetBytesPerPixel(Format pixelFormat);
102 * @brief Returns the offset of the byte containing the alpha value from the start of the pixel data
103 * and the bitmask of that byte to get the alpha value.
104 * For example, in case of RGBA4444, byteOffset value is 1 and bitMask value is 0x0f.
105 * It means the second byte contains the alpha value and the last 4 bits of the byte is the alpha value.
107 * Bitmask is zero if the pixelFormat does not support alpha
108 * @param[in] pixelFormat the pixel format
109 * @param[out] byteOffset the byte offset of the byte containing the alpha value
110 * @param[out] bitMask the bitmask of the byte to get the alpha value
112 DALI_IMPORT_API void GetAlphaOffsetAndMask(Format pixelFormat, int& byteOffset, int& bitMask);
118 #endif // __DALI_PIXEL_H__