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copybit에 해당되는 글 1건
- 2010.04.02 안드로이드 copybit 39
이부분은 안드로이드 HAL copybit ID 와 하드웨어 디바이스 드라이버 이름을 지정하는 곳이다./**
* The id of this module
*/
#define COPYBIT_HARDWARE_MODULE_ID "copybit"
/**
* Name of the graphics device to open
*/
#define COPYBIT_HARDWARE_COPYBIT0 "copybit0"
다음은 PIXEL 포멧을 지정하는 곳이다./* supported pixel-formats. these must be compatible with
* graphics/PixelFormat.java, ui/PixelFormat.h, pixelflinger/format.h
*/
enum {
COPYBIT_FORMAT_RGBA_8888 = HAL_PIXEL_FORMAT_RGBA_8888,
COPYBIT_FORMAT_RGBX_8888 = HAL_PIXEL_FORMAT_RGBX_8888,
COPYBIT_FORMAT_RGB_888 = HAL_PIXEL_FORMAT_RGB_888,
COPYBIT_FORMAT_RGB_565 = HAL_PIXEL_FORMAT_RGB_565,
COPYBIT_FORMAT_BGRA_8888 = HAL_PIXEL_FORMAT_BGRA_8888,
COPYBIT_FORMAT_RGBA_5551 = HAL_PIXEL_FORMAT_RGBA_5551,
COPYBIT_FORMAT_RGBA_4444 = HAL_PIXEL_FORMAT_RGBA_4444,
COPYBIT_FORMAT_YCbCr_422_SP = HAL_PIXEL_FORMAT_YCbCr_422_SP,
COPYBIT_FORMAT_YCbCr_420_SP = HAL_PIXEL_FORMAT_YCbCr_420_SP,
};
copybit 의 파라메터를 셋팅한다./* name for copybit_set_parameter */
enum {
/* rotation of the source image in degrees (0 to 359) */
COPYBIT_ROTATION_DEG = 1,
/* plane alpha value */
COPYBIT_PLANE_ALPHA = 2,
/* enable or disable dithering */
COPYBIT_DITHER = 3,
/* transformation applied (this is a superset of COPYBIT_ROTATION_DEG) */
COPYBIT_TRANSFORM = 4,
/* blurs the copied bitmap. The amount of blurring cannot be changed
* at this time. */
COPYBIT_BLUR = 5
};
이부분은 아마도 COPYBIT_TRANSFORM 파라메터와 같이 사용해서 이미지의 회전을 담당하는것 같다./* values for copybit_set_parameter(COPYBIT_TRANSFORM) */
enum {
/* flip source image horizontally */
COPYBIT_TRANSFORM_FLIP_H = HAL_TRANSFORM_FLIP_H,
/* flip source image vertically */
COPYBIT_TRANSFORM_FLIP_V = HAL_TRANSFORM_FLIP_V,
/* rotate source image 90 degres */
COPYBIT_TRANSFORM_ROT_90 = HAL_TRANSFORM_ROT_90,
/* rotate source image 180 degres */
COPYBIT_TRANSFORM_ROT_180 = HAL_TRANSFORM_ROT_180,
/* rotate source image 270 degres */
COPYBIT_TRANSFORM_ROT_270 = HAL_TRANSFORM_ROT_270,
};
파라메터 셋팅을 끌수도 있는것인가?/* enable/disable value copybit_set_parameter */
enum {
COPYBIT_DISABLE = 0,
COPYBIT_ENABLE = 1
};
하드웨어의 기본적인 정보들 인거 같다./* use get_static_info() to query static informations about the hardware */
enum {
/* Maximum amount of minification supported by the hardware*/
COPYBIT_MINIFICATION_LIMIT = 1,
/* Maximum amount of magnification supported by the hardware */
COPYBIT_MAGNIFICATION_LIMIT = 2,
/* Number of fractional bits support by the scaling engine */
COPYBIT_SCALING_FRAC_BITS = 3,
/* Supported rotation step in degres. */
COPYBIT_ROTATION_STEP_DEG = 4,
};
copybit_region_t 는 이름그대로 복사 영역이라는 뜻인거 같고 copybit_rect_t 구조체를 링크 시키고 있는것을 알 수있다./* Image structure */
struct copybit_image_t {
/* width */
uint32_t w;
/* height */
uint32_t h;
/* format COPYBIT_FORMAT_xxx */
int32_t format;
/* base of buffer with image */
void *base;
/* handle to the image */
native_handle_t* handle;
};
/* Rectangle */
struct copybit_rect_t {
/* left */
int l;
/* top */
int t;
/* right */
int r;
/* bottom */
int b;
};
/* Region */
struct copybit_region_t {
int (*next)(struct copybit_region_t const *region, struct copybit_rect_t *rect);
};
이것은 모든 안드로이드 HAL 모듈이 가지고 있는 device 와 module 구조체를 생성하는 부분이다./**
* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
* and the fields of this data structure must begin with hw_module_t
* followed by module specific information.
*/
struct copybit_module_t {
struct hw_module_t common;
};
/**
* Every device data structure must begin with hw_device_t
* followed by module specific public methods and attributes.
*/
struct copybit_device_t {
struct hw_device_t common;
/**
* Set a copybit parameter.
*
* @param dev from open
* @param name one for the COPYBIT_NAME_xxx
* @param value one of the COPYBIT_VALUE_xxx
*
* @return 0 if successful
*/
int (*set_parameter)(struct copybit_device_t *dev, int name, int value);
/**
* Get a static copybit information.
*
* @param dev from open
* @param name one of the COPYBIT_STATIC_xxx
*
* @return value or -EINVAL if error
*/
int (*get)(struct copybit_device_t *dev, int name);
/**
* Execute the bit blit copy operation
*
* @param dev from open
* @param dst is the destination image
* @param src is the source image
* @param region the clip region
*
* @return 0 if successful
*/
int (*blit)(struct copybit_device_t *dev,
struct copybit_image_t const *dst,
struct copybit_image_t const *src,
struct copybit_region_t const *region);
/**
* Execute the stretch bit blit copy operation
*
* @param dev from open
* @param dst is the destination image
* @param src is the source image
* @param dst_rect is the destination rectangle
* @param src_rect is the source rectangle
* @param region the clip region
*
* @return 0 if successful
*/
int (*stretch)(struct copybit_device_t *dev,
struct copybit_image_t const *dst,
struct copybit_image_t const *src,
struct copybit_rect_t const *dst_rect,
struct copybit_rect_t const *src_rect,
struct copybit_region_t const *region);
};
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