514 lines
18 KiB
C
514 lines
18 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H
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#define SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* If the HAL needs to create service threads to handle graphics related
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* tasks, these threads need to run at HAL_PRIORITY_URGENT_DISPLAY priority
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* if they can block the main rendering thread in any way.
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*
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* the priority of the current thread can be set with:
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*
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* #include <sys/resource.h>
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* setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY);
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*
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*/
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#define HAL_PRIORITY_URGENT_DISPLAY (-8)
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/**
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* pixel format definitions
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*/
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enum {
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/*
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* "linear" color pixel formats:
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*
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* The pixel formats below contain sRGB data but are otherwise treated
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* as linear formats, i.e.: no special operation is performed when
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* reading or writing into a buffer in one of these formats
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*/
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HAL_PIXEL_FORMAT_RGBA_8888 = 1,
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HAL_PIXEL_FORMAT_RGBX_8888 = 2,
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HAL_PIXEL_FORMAT_RGB_888 = 3,
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HAL_PIXEL_FORMAT_RGB_565 = 4,
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HAL_PIXEL_FORMAT_BGRA_8888 = 5,
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/*
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* sRGB color pixel formats:
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*
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* The red, green and blue components are stored in sRGB space, and converted
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* to linear space when read, using the standard sRGB to linear equation:
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*
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* Clinear = Csrgb / 12.92 for Csrgb <= 0.04045
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* = (Csrgb + 0.055 / 1.055)^2.4 for Csrgb > 0.04045
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*
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* When written the inverse transformation is performed:
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*
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* Csrgb = 12.92 * Clinear for Clinear <= 0.0031308
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* = 1.055 * Clinear^(1/2.4) - 0.055 for Clinear > 0.0031308
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*
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*
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* The alpha component, if present, is always stored in linear space and
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* is left unmodified when read or written.
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*
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*/
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HAL_PIXEL_FORMAT_sRGB_A_8888 = 0xC,
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HAL_PIXEL_FORMAT_sRGB_X_8888 = 0xD,
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/*
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* 0x100 - 0x1FF
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*
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* This range is reserved for pixel formats that are specific to the HAL
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* implementation. Implementations can use any value in this range to
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* communicate video pixel formats between their HAL modules. These formats
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* must not have an alpha channel. Additionally, an EGLimage created from a
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* gralloc buffer of one of these formats must be supported for use with the
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* GL_OES_EGL_image_external OpenGL ES extension.
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*/
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/*
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* Android YUV format:
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*
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* This format is exposed outside of the HAL to software decoders and
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* applications. EGLImageKHR must support it in conjunction with the
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* OES_EGL_image_external extension.
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*
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* YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed
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* by (W/2) x (H/2) Cr and Cb planes.
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*
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* This format assumes
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* - an even width
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* - an even height
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* - a horizontal stride multiple of 16 pixels
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* - a vertical stride equal to the height
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*
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* y_size = stride * height
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* c_stride = ALIGN(stride/2, 16)
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* c_size = c_stride * height/2
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* size = y_size + c_size * 2
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* cr_offset = y_size
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* cb_offset = y_size + c_size
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*
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*/
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HAL_PIXEL_FORMAT_YV12 = 0x32315659, // YCrCb 4:2:0 Planar
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/*
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* Android Y8 format:
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*
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* This format is exposed outside of the HAL to the framework.
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* The expected gralloc usage flags are SW_* and HW_CAMERA_*,
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* and no other HW_ flags will be used.
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*
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* Y8 is a YUV planar format comprised of a WxH Y plane,
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* with each pixel being represented by 8 bits.
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*
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* It is equivalent to just the Y plane from YV12.
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*
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* This format assumes
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* - an even width
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* - an even height
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* - a horizontal stride multiple of 16 pixels
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* - a vertical stride equal to the height
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*
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* size = stride * height
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*
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*/
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HAL_PIXEL_FORMAT_Y8 = 0x20203859,
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/*
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* Android Y16 format:
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*
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* This format is exposed outside of the HAL to the framework.
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* The expected gralloc usage flags are SW_* and HW_CAMERA_*,
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* and no other HW_ flags will be used.
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*
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* Y16 is a YUV planar format comprised of a WxH Y plane,
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* with each pixel being represented by 16 bits.
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*
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* It is just like Y8, but has double the bits per pixel (little endian).
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*
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* This format assumes
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* - an even width
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* - an even height
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* - a horizontal stride multiple of 16 pixels
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* - a vertical stride equal to the height
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* - strides are specified in pixels, not in bytes
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*
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* size = stride * height * 2
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*
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*/
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HAL_PIXEL_FORMAT_Y16 = 0x20363159,
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/*
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* Android RAW sensor format:
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*
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* This format is exposed outside of the camera HAL to applications.
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*
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* RAW_SENSOR is a single-channel, 16-bit, little endian format, typically
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* representing raw Bayer-pattern images from an image sensor, with minimal
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* processing.
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*
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* The exact pixel layout of the data in the buffer is sensor-dependent, and
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* needs to be queried from the camera device.
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*
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* Generally, not all 16 bits are used; more common values are 10 or 12
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* bits. If not all bits are used, the lower-order bits are filled first.
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* All parameters to interpret the raw data (black and white points,
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* color space, etc) must be queried from the camera device.
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*
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* This format assumes
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* - an even width
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* - an even height
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* - a horizontal stride multiple of 16 pixels
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* - a vertical stride equal to the height
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* - strides are specified in pixels, not in bytes
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*
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* size = stride * height * 2
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*
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* This format must be accepted by the gralloc module when used with the
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* following usage flags:
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* - GRALLOC_USAGE_HW_CAMERA_*
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* - GRALLOC_USAGE_SW_*
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* - GRALLOC_USAGE_RENDERSCRIPT
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*/
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HAL_PIXEL_FORMAT_RAW16 = 0x20,
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HAL_PIXEL_FORMAT_RAW_SENSOR = 0x20, // TODO(rubenbrunk): Remove RAW_SENSOR.
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/*
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* Android RAW10 format:
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*
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* This format is exposed outside of the camera HAL to applications.
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*
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* RAW10 is a single-channel, 10-bit per pixel, densely packed in each row,
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* unprocessed format, usually representing raw Bayer-pattern images coming from
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* an image sensor.
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*
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* In an image buffer with this format, starting from the first pixel of each
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* row, each 4 consecutive pixels are packed into 5 bytes (40 bits). Each one
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* of the first 4 bytes contains the top 8 bits of each pixel, The fifth byte
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* contains the 2 least significant bits of the 4 pixels, the exact layout data
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* for each 4 consecutive pixels is illustrated below (Pi[j] stands for the jth
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* bit of the ith pixel):
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*
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* bit 7 bit 0
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* =====|=====|=====|=====|=====|=====|=====|=====|
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* Byte 0: |P0[9]|P0[8]|P0[7]|P0[6]|P0[5]|P0[4]|P0[3]|P0[2]|
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* |-----|-----|-----|-----|-----|-----|-----|-----|
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* Byte 1: |P1[9]|P1[8]|P1[7]|P1[6]|P1[5]|P1[4]|P1[3]|P1[2]|
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* |-----|-----|-----|-----|-----|-----|-----|-----|
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* Byte 2: |P2[9]|P2[8]|P2[7]|P2[6]|P2[5]|P2[4]|P2[3]|P2[2]|
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* |-----|-----|-----|-----|-----|-----|-----|-----|
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* Byte 3: |P3[9]|P3[8]|P3[7]|P3[6]|P3[5]|P3[4]|P3[3]|P3[2]|
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* |-----|-----|-----|-----|-----|-----|-----|-----|
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* Byte 4: |P3[1]|P3[0]|P2[1]|P2[0]|P1[1]|P1[0]|P0[1]|P0[0]|
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* ===============================================
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*
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* This format assumes
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* - a width multiple of 4 pixels
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* - an even height
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* - a vertical stride equal to the height
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* - strides are specified in bytes, not in pixels
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*
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* size = stride * height
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*
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* When stride is equal to width * (10 / 8), there will be no padding bytes at
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* the end of each row, the entire image data is densely packed. When stride is
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* larger than width * (10 / 8), padding bytes will be present at the end of each
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* row (including the last row).
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*
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* This format must be accepted by the gralloc module when used with the
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* following usage flags:
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* - GRALLOC_USAGE_HW_CAMERA_*
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* - GRALLOC_USAGE_SW_*
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* - GRALLOC_USAGE_RENDERSCRIPT
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*/
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HAL_PIXEL_FORMAT_RAW10 = 0x25,
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/*
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* Android opaque RAW format:
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*
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* This format is exposed outside of the camera HAL to applications.
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*
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* RAW_OPAQUE is a format for unprocessed raw image buffers coming from an
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* image sensor. The actual structure of buffers of this format is
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* implementation-dependent.
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*
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* This format must be accepted by the gralloc module when used with the
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* following usage flags:
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* - GRALLOC_USAGE_HW_CAMERA_*
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* - GRALLOC_USAGE_SW_*
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* - GRALLOC_USAGE_RENDERSCRIPT
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*/
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HAL_PIXEL_FORMAT_RAW_OPAQUE = 0x24,
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/*
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* Android binary blob graphics buffer format:
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*
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* This format is used to carry task-specific data which does not have a
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* standard image structure. The details of the format are left to the two
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* endpoints.
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*
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* A typical use case is for transporting JPEG-compressed images from the
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* Camera HAL to the framework or to applications.
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*
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* Buffers of this format must have a height of 1, and width equal to their
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* size in bytes.
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*/
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HAL_PIXEL_FORMAT_BLOB = 0x21,
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/*
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* Android format indicating that the choice of format is entirely up to the
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* device-specific Gralloc implementation.
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*
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* The Gralloc implementation should examine the usage bits passed in when
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* allocating a buffer with this format, and it should derive the pixel
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* format from those usage flags. This format will never be used with any
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* of the GRALLOC_USAGE_SW_* usage flags.
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*
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* If a buffer of this format is to be used as an OpenGL ES texture, the
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* framework will assume that sampling the texture will always return an
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* alpha value of 1.0 (i.e. the buffer contains only opaque pixel values).
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*
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*/
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HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED = 0x22,
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/*
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* Android flexible YCbCr formats
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*
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* This format allows platforms to use an efficient YCbCr/YCrCb buffer
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* layout, while still describing the buffer layout in a way accessible to
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* the CPU in a device-independent manner. While called YCbCr, it can be
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* used to describe formats with either chromatic ordering, as well as
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* whole planar or semiplanar layouts.
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*
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* struct android_ycbcr (below) is the the struct used to describe it.
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*
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* This format must be accepted by the gralloc module when
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* USAGE_HW_CAMERA_WRITE and USAGE_SW_READ_* are set.
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*
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* This format is locked for use by gralloc's (*lock_ycbcr) method, and
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* locking with the (*lock) method will return an error.
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*/
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HAL_PIXEL_FORMAT_YCbCr_420_888 = 0x23,
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/* Legacy formats (deprecated), used by ImageFormat.java */
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HAL_PIXEL_FORMAT_YCbCr_422_SP = 0x10, // NV16
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HAL_PIXEL_FORMAT_YCrCb_420_SP = 0x11, // NV21
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HAL_PIXEL_FORMAT_YCbCr_422_I = 0x14, // YUY2
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};
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/*
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* Structure for describing YCbCr formats for consumption by applications.
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* This is used with HAL_PIXEL_FORMAT_YCbCr_*_888.
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*
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* Buffer chroma subsampling is defined in the format.
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* e.g. HAL_PIXEL_FORMAT_YCbCr_420_888 has subsampling 4:2:0.
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*
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* Buffers must have a 8 bit depth.
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*
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* @y, @cb, and @cr point to the first byte of their respective planes.
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*
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* Stride describes the distance in bytes from the first value of one row of
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* the image to the first value of the next row. It includes the width of the
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* image plus padding.
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* @ystride is the stride of the luma plane.
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* @cstride is the stride of the chroma planes.
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*
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* @chroma_step is the distance in bytes from one chroma pixel value to the
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* next. This is 2 bytes for semiplanar (because chroma values are interleaved
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* and each chroma value is one byte) and 1 for planar.
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*/
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struct android_ycbcr {
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void *y;
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void *cb;
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void *cr;
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size_t ystride;
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size_t cstride;
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size_t chroma_step;
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/** reserved for future use, set to 0 by gralloc's (*lock_ycbcr)() */
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uint32_t reserved[8];
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};
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/**
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* Transformation definitions
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*
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* IMPORTANT NOTE:
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* HAL_TRANSFORM_ROT_90 is applied CLOCKWISE and AFTER HAL_TRANSFORM_FLIP_{H|V}.
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*
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*/
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enum {
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/* flip source image horizontally (around the vertical axis) */
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HAL_TRANSFORM_FLIP_H = 0x01,
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/* flip source image vertically (around the horizontal axis)*/
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HAL_TRANSFORM_FLIP_V = 0x02,
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/* rotate source image 90 degrees clockwise */
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HAL_TRANSFORM_ROT_90 = 0x04,
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/* rotate source image 180 degrees */
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HAL_TRANSFORM_ROT_180 = 0x03,
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/* rotate source image 270 degrees clockwise */
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HAL_TRANSFORM_ROT_270 = 0x07,
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/* don't use. see system/window.h */
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HAL_TRANSFORM_RESERVED = 0x08,
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};
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/**
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* Colorspace Definitions
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* ======================
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*
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* Colorspace is the definition of how pixel values should be interpreted.
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* It includes primaries (including white point) and the transfer
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* characteristic function, which describes both gamma curve and numeric
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* range (within the bit depth).
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*/
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enum {
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/*
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* Arbitrary colorspace with manually defined characteristics.
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* Colorspace definition must be communicated separately.
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*
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* This is used when specifying primaries, transfer characteristics,
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* etc. separately.
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*
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* A typical use case is in video encoding parameters (e.g. for H.264),
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* where a colorspace can have separately defined primaries, transfer
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* characteristics, etc.
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*/
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HAL_COLORSPACE_ARBITRARY = 0x1,
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/*
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* YCbCr Colorspaces
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* -----------------
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*
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* Primaries are given using (x,y) coordinates in the CIE 1931 definition
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* of x and y specified by ISO 11664-1.
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*
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* Transfer characteristics are the opto-electronic transfer characteristic
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* at the source as a function of linear optical intensity (luminance).
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*/
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/*
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* JPEG File Interchange Format (JFIF)
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*
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* Same model as BT.601-625, but all values (Y, Cb, Cr) range from 0 to 255
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*
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* Transfer characteristic curve:
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* E = 1.099 * L ^ 0.45 - 0.099, 1.00 >= L >= 0.018
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* E = 4.500 L, 0.018 > L >= 0
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* L - luminance of image 0 <= L <= 1 for conventional colorimetry
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* E - corresponding electrical signal
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*
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* Primaries: x y
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* green 0.290 0.600
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* blue 0.150 0.060
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* red 0.640 0.330
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* white (D65) 0.3127 0.3290
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*/
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HAL_COLORSPACE_JFIF = 0x101,
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/*
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* ITU-R Recommendation 601 (BT.601) - 625-line
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*
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* Standard-definition television, 625 Lines (PAL)
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*
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* For 8-bit-depth formats:
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* Luma (Y) samples should range from 16 to 235, inclusive
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* Chroma (Cb, Cr) samples should range from 16 to 240, inclusive
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*
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* For 10-bit-depth formats:
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* Luma (Y) samples should range from 64 to 940, inclusive
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* Chroma (Cb, Cr) samples should range from 64 to 960, inclusive
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*
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* Transfer characteristic curve:
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* E = 1.099 * L ^ 0.45 - 0.099, 1.00 >= L >= 0.018
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* E = 4.500 L, 0.018 > L >= 0
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* L - luminance of image 0 <= L <= 1 for conventional colorimetry
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* E - corresponding electrical signal
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*
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* Primaries: x y
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* green 0.290 0.600
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* blue 0.150 0.060
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* red 0.640 0.330
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* white (D65) 0.3127 0.3290
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*/
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HAL_COLORSPACE_BT601_625 = 0x102,
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/*
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* ITU-R Recommendation 601 (BT.601) - 525-line
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*
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* Standard-definition television, 525 Lines (NTSC)
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*
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* For 8-bit-depth formats:
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* Luma (Y) samples should range from 16 to 235, inclusive
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* Chroma (Cb, Cr) samples should range from 16 to 240, inclusive
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*
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* For 10-bit-depth formats:
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* Luma (Y) samples should range from 64 to 940, inclusive
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* Chroma (Cb, Cr) samples should range from 64 to 960, inclusive
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*
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* Transfer characteristic curve:
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* E = 1.099 * L ^ 0.45 - 0.099, 1.00 >= L >= 0.018
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* E = 4.500 L, 0.018 > L >= 0
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* L - luminance of image 0 <= L <= 1 for conventional colorimetry
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* E - corresponding electrical signal
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*
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* Primaries: x y
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* green 0.310 0.595
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* blue 0.155 0.070
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* red 0.630 0.340
|
|
* white (D65) 0.3127 0.3290
|
|
*/
|
|
HAL_COLORSPACE_BT601_525 = 0x103,
|
|
|
|
/*
|
|
* ITU-R Recommendation 709 (BT.709)
|
|
*
|
|
* High-definition television
|
|
*
|
|
* For 8-bit-depth formats:
|
|
* Luma (Y) samples should range from 16 to 235, inclusive
|
|
* Chroma (Cb, Cr) samples should range from 16 to 240, inclusive
|
|
*
|
|
* For 10-bit-depth formats:
|
|
* Luma (Y) samples should range from 64 to 940, inclusive
|
|
* Chroma (Cb, Cr) samples should range from 64 to 960, inclusive
|
|
*
|
|
* Primaries: x y
|
|
* green 0.300 0.600
|
|
* blue 0.150 0.060
|
|
* red 0.640 0.330
|
|
* white (D65) 0.3127 0.3290
|
|
*/
|
|
HAL_COLORSPACE_BT709 = 0x104,
|
|
};
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H */
|