image_pixel_map_mdk.h
Overview
The image_pixel_map_mdk.h file declares the APIs used to lock, access, and unlock a pixel map.
Since: 10
Related module: Image
Summary
Structs
| Name | Description |
|---|---|
| OhosPixelMapInfos | Defines the information about a pixel map. |
| OhosPixelMapCreateOps | Defines the options used for creating a pixel map. |
Types
| Name | Description |
|---|---|
| NativePixelMap | Defines the data type name of the pixel map at the native layer. |
| OhosPixelMapInfos | Defines the information about a pixel map. |
Enums
| Name | Description |
|---|---|
| { OHOS_PIXEL_MAP_ALPHA_TYPE_UNKNOWN = 0, OHOS_PIXEL_MAP_ALPHA_TYPE_OPAQUE = 1, OHOS_PIXEL_MAP_ALPHA_TYPE_PREMUL = 2, OHOS_PIXEL_MAP_ALPHA_TYPE_UNPREMUL = 3 } |
Enumerates the pixel map alpha types. |
| { OHOS_PIXEL_MAP_READ_ONLY = 0, OHOS_PIXEL_MAP_EDITABLE = 1 } |
Enumerates the pixel map editing types. |
Functions
| Name | Description |
|---|---|
| OH_PixelMap_CreatePixelMap (napi_env env, OhosPixelMapCreateOps info, void *buf, size_t len, napi_value *res) | Creates a PixelMap object. |
| OH_PixelMap_CreateAlphaPixelMap (napi_env env, napi_value source, napi_value *alpha) | Creates a PixelMap object that contains only alpha channel information. |
| OH_PixelMap_InitNativePixelMap (napi_env env, napi_value source) | Initializes a PixelMap object. |
| OH_PixelMap_GetBytesNumberPerRow (const NativePixelMap *native, int32_t *num) | Obtains the number of bytes per row of a NativePixelMap object. |
| OH_PixelMap_GetIsEditable (const NativePixelMap *native, int32_t *editable) | Checks whether a NativePixelMap object is editable. |
| OH_PixelMap_IsSupportAlpha (const NativePixelMap *native, int32_t *alpha) | Checks whether a NativePixelMap object supports alpha channels. |
| OH_PixelMap_SetAlphaAble (const NativePixelMap *native, int32_t alpha) | Sets an alpha channel for a NativePixelMap object. |
| OH_PixelMap_GetDensity (const NativePixelMap *native, int32_t *density) | Obtains the pixel density of a NativePixelMap object. |
| OH_PixelMap_SetDensity (const NativePixelMap *native, int32_t density) | Sets the pixel density for a NativePixelMap object. |
| OH_PixelMap_SetOpacity (const NativePixelMap *native, float opacity) | Sets the opacity for a NativePixelMap object. |
| OH_PixelMap_Scale (const NativePixelMap *native, float x, float y) | Scales a NativePixelMap object. |
| OH_PixelMap_Translate (const NativePixelMap *native, float x, float y) | Translates a NativePixelMap object. |
| OH_PixelMap_Rotate (const NativePixelMap *native, float angle) | Rotates a NativePixelMap object. |
| OH_PixelMap_Flip (const NativePixelMap *native, int32_t x, int32_t y) | Flips a NativePixelMap object. |
| OH_PixelMap_Crop (const NativePixelMap *native, int32_t x, int32_t y, int32_t width, int32_t height) | Crops a NativePixelMap object. |
| OH_PixelMap_GetImageInfo (const NativePixelMap *native, OhosPixelMapInfos *info) | Obtains the image information of a NativePixelMap object. |
| OH_PixelMap_AccessPixels (const NativePixelMap *native, void **addr) | Obtains the memory address of a NativePixelMap object and locks the memory. |
| OH_PixelMap_UnAccessPixels (const NativePixelMap *native) | Unlocks the memory of a NativePixelMap object. This function is used with OH_PixelMap_AccessPixels in pairs. |