stm32f4开发板自带的gif解码没有背景色选择

zhlmtt · 发表于 2016-10-12 09:29:50

本人菜鸟一枚请大神帮忙看一下怎么样修改能把gif（GIF本身的透明的）图片显示为融入背景色

zhlmtt · 发表于 2016-10-12 09:29:51

问题已解决

zhlmtt · 发表于 2016-10-12 13:47:10

本帖最后由 zhlmtt 于 2016-10-12 13:49 编辑

源码如下
u8 gif_decode(const u8 *filename,u16 x,u16 y,u16 width,u16 height)
{
u8 res=0;
u16 dtime=0;
gif89a *mygif89a;
FIL *gfile;
#if GIF_USE_MALLOC==1
gfile=(FIL*)pic_memalloc(sizeof(FIL));
if(gfile==NULL)res=PIC_MEM_ERR;
mygif89a=(gif89a*)pic_memalloc(sizeof(gif89a));
if(mygif89a==NULL)res=PIC_MEM_ERR;
mygif89a->lzw=(LZW_INFO*)pic_memalloc(sizeof(LZW_INFO));
if(mygif89a->lzw==NULL)res=PIC_MEM_ERR;
#else
gfile=&f_gfile;
mygif89a=&tgif89a;
mygif89a->lzw=&tlzw;
#endif

if(res==0)//OK
{
res=f_open(gfile,(TCHAR *)filename,FA_READ);
if(res==0)
{
if(gif_check_head(gfile))res=PIC_FORMAT_ERR;
if(gif_getinfo(gfile,mygif89a))res=PIC_FORMAT_ERR;
if(mygif89a->gifLSD.width>width||mygif89a->gifLSD.height>height)res=PIC_SIZE_ERR;
else
{
x=(width-mygif89a->gifLSD.width)/2+x;
y=(height-mygif89a->gifLSD.height)/2+y;
}
gifdecoding=1;
while(gifdecoding&&res==0)
{
res=gif_drawimage(gfile,mygif89a,x,y);
if(mygif89a->gifISD.flag&0x80)gif_recovergctbl(mygif89a);
if(mygif89a->delay)dtime=mygif89a->delay;
else dtime=10;
while(dtime--&&gifdecoding)delay_ms(10);
if(res==2)
{
res=0;
break;
}
}
}
f_close(gfile);
}
#if GIF_USE_MALLOC==1
pic_memfree(gfile);
pic_memfree(mygif89a->lzw);
pic_memfree(mygif89a);
#endif
return res;
}