Description

获取active layer。

Parameters

Name	Description
input	无
input_len	无
output	gdi_layer_struct数据结构指针
output_len	gdi_layer_struct数据结构大小
cb	无

Return Value

MR_SUCCESS                   成功
MR_FAILED                      失败
MR_IGNORE                      不支持该功能

Remarks

gdi_layer_struct数据结构：
typedef struct gdi_layer_struct
{
    U32 id;
    U32 flag;
    S32 layer_size; /* bytes */
    U16 width, height;
    S16 clipx1, clipy1, clipx2, clipy2;
    U8 *buf_ptr;
    U8 *buf_ptr1;
    gdi_rect_struct clips[GDI_LAYER_CLIP_STACK_COUNT];
    U8 bits_per_pixel;
    U8 clips_top;
    U8 cf;          /* real color format ( it will support LCD color format) */
    U8 vcf;         /* virtual color format (convert to standard color format) */
    gd_get_pixel_func get_pixel;
    gd_put_pixel_func put_pixel;
    struct gdi_layer_struct *child;
    struct gdi_layer_struct *sib;
    S32 offset_x, offset_y;
    S32 offset_x_from_parent;
    S32 offset_y_from_parent;
    void (*lazy_free_callback)(gdi_handle handle);
    gdi_color background;   /* only valide when this layer is the "lowest" layer. */
    U8 rotate_value;
} gdi_layer_struct;

Example

See Also