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/*
* Copyright (C) 2005 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Pixel formats used across the system.
// These formats might not all be supported by all renderers, for instance
// skia or SurfaceFlinger are not required to support all of these formats
// (either as source or destination)
#ifndef UI_PIXELFORMAT_H
#define UI_PIXELFORMAT_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <hardware/hardware.h>
namespace android {
enum {
//
// these constants need to match those
// in graphics/PixelFormat.java & pixelflinger/format.h
//
PIXEL_FORMAT_UNKNOWN = 0,
PIXEL_FORMAT_NONE = 0,
// logical pixel formats used by the SurfaceFlinger -----------------------
PIXEL_FORMAT_CUSTOM = -4,
// Custom pixel-format described by a PixelFormatInfo structure
PIXEL_FORMAT_TRANSLUCENT = -3,
// System chooses a format that supports translucency (many alpha bits)
PIXEL_FORMAT_TRANSPARENT = -2,
// System chooses a format that supports transparency
// (at least 1 alpha bit)
PIXEL_FORMAT_OPAQUE = -1,
// System chooses an opaque format (no alpha bits required)
// real pixel formats supported for rendering -----------------------------
PIXEL_FORMAT_RGBA_8888 = HAL_PIXEL_FORMAT_RGBA_8888, // 4x8-bit RGBA
PIXEL_FORMAT_RGBX_8888 = HAL_PIXEL_FORMAT_RGBX_8888, // 4x8-bit RGB0
PIXEL_FORMAT_RGB_888 = HAL_PIXEL_FORMAT_RGB_888, // 3x8-bit RGB
PIXEL_FORMAT_RGB_565 = HAL_PIXEL_FORMAT_RGB_565, // 16-bit RGB
PIXEL_FORMAT_BGRA_8888 = HAL_PIXEL_FORMAT_BGRA_8888, // 4x8-bit BGRA
PIXEL_FORMAT_RGBA_5551 = HAL_PIXEL_FORMAT_RGBA_5551, // 16-bit ARGB
PIXEL_FORMAT_RGBA_4444 = HAL_PIXEL_FORMAT_RGBA_4444, // 16-bit ARGB
PIXEL_FORMAT_A_8 = 8, // 8-bit A
};
typedef int32_t PixelFormat;
struct PixelFormatInfo {
enum {
INDEX_ALPHA = 0,
INDEX_RED = 1,
INDEX_GREEN = 2,
INDEX_BLUE = 3
};
enum { // components
ALPHA = 1,
RGB = 2,
RGBA = 3,
L = 4,
LA = 5,
OTHER = 0xFF
};
struct szinfo {
uint8_t h;
uint8_t l;
};
inline PixelFormatInfo() : version(sizeof(PixelFormatInfo)) { }
size_t getScanlineSize(unsigned int width) const;
size_t getSize(size_t ci) const {
return (ci <= 3) ? (cinfo[ci].h - cinfo[ci].l) : 0;
}
size_t version;
PixelFormat format;
size_t bytesPerPixel;
size_t bitsPerPixel;
union {
szinfo cinfo[4];
struct {
uint8_t h_alpha;
uint8_t l_alpha;
uint8_t h_red;
uint8_t l_red;
uint8_t h_green;
uint8_t l_green;
uint8_t h_blue;
uint8_t l_blue;
};
};
uint8_t components;
uint8_t reserved0[3];
uint32_t reserved1;
};
// Consider caching the results of these functions are they're not
// guaranteed to be fast.
ssize_t bytesPerPixel(PixelFormat format);
ssize_t bitsPerPixel(PixelFormat format);
status_t getPixelFormatInfo(PixelFormat format, PixelFormatInfo* info);
}; // namespace android
#endif // UI_PIXELFORMAT_H
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