/**********************************************
* Author: [email protected]
* File name: imgrotate.c
* Description: animation
* Modified:
* date: 2014-01-06 create
*********************************************/
#include <directfb.h> #include "animation.h" #define MAX_LOOP 2
#define INTERVAL_PIXEL 2
#define EYE_HZ 50
#define INTERVAL_TIME (1000 / EYE_HZ) static int animation(int argc, char **argv); int main(int argc, char **argv)
{
return animation(argc, argv);
} static int animation(int argc, char **argv)
{
int i, loop = 0;
int screen_width = 0, screen_height = 0;
DFBSurfaceDescription dsc;
/*
* For collecting infomation of image,
* and provide image to IDirectFBSurface
*/
IDirectFBImageProvider *provider;
IDirectFB *dfb = NULL;
IDirectFBSurface *primary = NULL;
IDirectFBSurface *logo = NULL; /* 初始化整个DirectFB库，为后续画图等操作做准备 */
DirectFBInit(&argc, &argv);
DirectFBCreate(&dfb); /* 设置协作等级为全屏模式,具体请阅读SetCooperativeLevel接口解析 */
dfb->SetCooperativeLevel(dfb, DFSCL_FULLSCREEN);
dsc.flags = DSDESC_CAPS;
dsc.caps = DSCAPS_PRIMARY | DSCAPS_FLIPPING; /* 根据dsc创建一个基本平面 */
dfb->CreateSurface(dfb, &dsc, &primary);
/* 获取该基本平面的宽度和高度 */
primary->GetSize(primary, &screen_width, &screen_height); /* 将要显示的图片及其相关信息保存在provider中 */
dfb->CreateImageProvider(dfb, BA_IMG_NAME, &provider); /* 将保存在provider中的图片信息提取出来，存于dsc中 */
provider->GetSurfaceDescription(provider, &dsc); /* 根据dsc创建一个图像平面 */
dfb->CreateSurface(dfb, &dsc, &logo); /* 将图片呈递给刚才建立的logo平面，如果大小不一，则进行缩放 */
provider->RenderTo(provider, logo, NULL); /* 释放资源provider */
provider->Release(provider); for (i = -dsc.width;
i < screen_width && !ba_check_exit(shared_mem);
i = i + INTERVAL_PIXEL) {
/* 清空屏幕 */
primary->FillRectangle(primary, 0, 0,
screen_width, screen_height);
primary->Blit(primary, logo, NULL, i,
(screen_height - dsc.height) / 2);
/*
* Blit model:将图片blit到平面
* Blit(IDirectFBSurface *thiz, IDirectFBSurface *source,
* const DFBRectangle *source_rect, int x, int y);
* if source_rect == NULL，use entire surface.
* DFBRctangle is rectangular frame defined by two points.
* (x, y):the point of top left corner.
*/ /* flit整个屏幕 */
primary->Flip(primary, NULL, DSFLIP_WAITFORSYNC); msleep(INTERVAL_TIME); if ((screen_width - INTERVAL_PIXEL) <= i && loop < MAX_LOOP) {
BA_LOG(1, "screen_width:%d, loop:%d.\n", screen_width, loop);
loop++;
i = -dsc.width;
} } logo->Release(logo);
primary->Release(primary);
dfb->Release(dfb);
return 0;
}