harmony 鸿蒙drawing_bitmap.h
drawing_bitmap.h
Overview
The drawing_bitmap.h declares the functions related to the bitmap in the drawing module.
File to include: <native_drawing/drawing_bitmap.h>
Library: libnative_drawing.so
Since: 8
Related module: Drawing
Summary
Structs
| Name | Description |
|---|---|
| struct OH_Drawing_BitmapFormat | Describes the pixel format of a bitmap, including the color type and alpha type. |
Types
| Name | Description |
|---|---|
| typedef struct OH_Drawing_BitmapFormat OH_Drawing_BitmapFormat | Defines a struct for the pixel format of a bitmap, including the color type and alpha type. |
Functions
| Name | Description |
|---|---|
| OH_Drawing_Bitmap * OH_Drawing_BitmapCreate (void) | Creates an OH_Drawing_Bitmap object. |
| void OH_Drawing_BitmapDestroy (OH_Drawing_Bitmap *) | Destroys an OH_Drawing_Bitmap object and reclaims the memory occupied by the object. |
| OH_Drawing_Bitmap * OH_Drawing_BitmapCreateFromPixels (OH_Drawing_Image_Info *, void *pixels, uint32_t rowBytes) | Creates an OH_Drawing_Bitmap object, with the address of the memory for storing the bitmap pixels set to the memory address that you applied for. |
| void OH_Drawing_BitmapBuild (OH_Drawing_Bitmap *, const uint32_t width, const uint32_t height, const OH_Drawing_BitmapFormat *) | Initializes the width and height of a bitmap and sets the pixel format for the bitmap. |
| uint32_t OH_Drawing_BitmapGetWidth (OH_Drawing_Bitmap *) | Obtains the width of a bitmap. |
| uint32_t OH_Drawing_BitmapGetHeight (OH_Drawing_Bitmap *) | Obtains the height of a bitmap. |
| OH_Drawing_ColorFormat OH_Drawing_BitmapGetColorFormat (OH_Drawing_Bitmap *) | Obtains the pixel format of a bitmap. |
| OH_Drawing_AlphaFormat OH_Drawing_BitmapGetAlphaFormat (OH_Drawing_Bitmap *) | Obtains the alpha component of a bitmap. |
| void * OH_Drawing_BitmapGetPixels (OH_Drawing_Bitmap *) | Obtains the pixel address of a bitmap. You can use this address to obtain the pixel data of the bitmap. |
| void OH_Drawing_BitmapGetImageInfo (OH_Drawing_Bitmap *, OH_Drawing_Image_Info *) | Obtains the image information of a bitmap. |
| bool OH_Drawing_BitmapReadPixels (OH_Drawing_Bitmap *, const OH_Drawing_Image_Info *dstInfo, void *dstPixels, size_t dstRowBytes, int32_t srcX, int32_t srcY) | Reads pixels of the rectangle in a bitmap to the specified buffer. |
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