掌機 - Miyoo Mini Plus - C/C++ - Flip Screen


main.c

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#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdint.h>
#include <linux/fb.h>
#include <sys/ioctl.h>
#include <SDL/SDL.h>
#include <mi_sys.h>
#include <mi_gfx.h>
 
#define DOUBLEBUF
 
int fd_fb = 0;
struct fb_fix_screeninfo finfo = {0};
struct fb_var_screeninfo vinfo = {0};
MI_PHY fb_phyAddr = {0};
MI_GFX_Surface_t stSrc = {0};
MI_GFX_Rect_t stSrcRect = {0};
MI_GFX_Surface_t stDst = {0};
MI_GFX_Rect_t stDstRect = {0};
MI_GFX_Opt_t stOpt = {0};
  
void GFX_Init(void)
{
    if (fd_fb == 0) {
        SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);
        MI_SYS_Init();
        MI_GFX_Open();
  
        fd_fb = open("/dev/fb0", O_RDWR);
        ioctl(fd_fb, FBIOGET_FSCREENINFO, &finfo);
        fb_phyAddr = finfo.smem_start;
        ioctl(fd_fb, FBIOGET_VSCREENINFO, &vinfo);
        vinfo.yoffset = 0;
        ioctl(fd_fb, FBIOPUT_VSCREENINFO, &vinfo);
        MI_SYS_MemsetPa(fb_phyAddr, 0, 640 * 480 * 4 * 2);
  
        stDst.phyAddr = fb_phyAddr;
        stDst.eColorFmt = E_MI_GFX_FMT_ARGB8888;
        stDst.u32Width = 640;
        stDst.u32Height = 480;
        stDst.u32Stride = 640 * 4;
        stDstRect.s32Xpos = 0;
        stDstRect.s32Ypos = 0;
        stDstRect.u32Width = 640;
        stDstRect.u32Height = 480;
  
        memset(&stOpt, 0, sizeof(stOpt));
        stOpt.eSrcDfbBldOp = E_MI_GFX_DFB_BLD_ONE;
        stOpt.eRotate = E_MI_GFX_ROTATE_180;
    }
}
  
void GFX_Quit(void)
{
    if (fd_fb) {
        vinfo.yoffset = 0;
        ioctl(fd_fb, FBIOPUT_VSCREENINFO, &vinfo);
        close(fd_fb);
        fd_fb = 0;
        MI_GFX_Close();
        MI_SYS_Exit();
    }
}
  
#define pixelsPa unused1
SDL_Surface* GFX_CreateRGBSurface(uint32_t flags, int width, int height, int depth, uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask)
{
    SDL_Surface *surface;
    MI_PHY phyAddr;
    void *virAddr;
    int pitch = width * uint32_t(depth/8);
    uint32_t size = pitch * height;
  
    MI_SYS_MMA_Alloc(NULL, size, &phyAddr);
    MI_SYS_Mmap(phyAddr, size, &virAddr, TRUE);
    surface = SDL_CreateRGBSurfaceFrom(virAddr,width,height,depth,pitch,Rmask,Gmask,Bmask,Amask);
    if (surface != NULL) {
        surface->pixelsPa = phyAddr;
    }
    return surface;
}
  
void GFX_FreeSurface(SDL_Surface *surface)
{
    MI_PHY phyAddr = surface->pixelsPa;
    void *virAddr = surface->pixels;
    uint32_t size = surface->pitch * surface->h;
  
    SDL_FreeSurface(surface);
    if (phyAddr) {
        MI_SYS_Munmap(virAddr, size);
        MI_SYS_MMA_Free(phyAddr);
    }
}
  
void GFX_ClearSurface(SDL_Surface *surface)
{
    MI_SYS_MemsetPa(surface->pixelsPa,0,surface->pitch * surface->h);
}
  
void GFX_CopySurface(SDL_Surface *src, SDL_Surface *dst)
{
    uint32_t size = src->pitch * src->h;
  
    if (size == uint32_t(dst->pitch * dst->h)) {
        MI_SYS_FlushInvCache(src->pixels, size);
        MI_SYS_MemcpyPa(dst->pixelsPa,src->pixelsPa,size);
    }
}
  
void GFX_Flip(SDL_Surface *surface)
{
    MI_U16 u16Fence;
  
    stSrc.phyAddr = surface->pixelsPa;
    if (surface->format->BytesPerPixel == 2) {
        stSrc.eColorFmt = E_MI_GFX_FMT_RGB565;
    }
    else {
        stSrc.eColorFmt = E_MI_GFX_FMT_ARGB8888;
    }
    stSrc.u32Width = surface->w;
    stSrc.u32Height = surface->h;
    stSrc.u32Stride = surface->pitch;
    stSrcRect.s32Xpos = 0;
    stSrcRect.s32Ypos = 0;
    stSrcRect.u32Width = stSrc.u32Width;
    stSrcRect.u32Height = stSrc.u32Height;
#ifdef DOUBLEBUF
    vinfo.yoffset ^= 480;
    stDst.phyAddr = fb_phyAddr + (640 * vinfo.yoffset * 4);
#endif
    MI_SYS_FlushInvCache(surface->pixels, surface->pitch * surface->h);
    MI_GFX_BitBlit(&stSrc,&stSrcRect,&stDst,&stDstRect,&stOpt,&u16Fence);
    MI_GFX_WaitAllDone(FALSE, u16Fence);
#ifdef DOUBLEBUF
    ioctl(fd_fb, FBIOPAN_DISPLAY, &vinfo);
#endif
}
  
SDL_Surface *screen = NULL;
  
int main(int argc, char *argv[])
{
    SDL_Rect rt = {0};
  
    SDL_Init(SDL_INIT_VIDEO);
    GFX_Init();
    SDL_ShowCursor(0);
    screen = GFX_CreateRGBSurface(0, 320, 240, 16, 0, 0, 0, 0);
     
    uint32_t cnt = 0;
    uint32_t col[] = {0xf800, 0x7e0, 0x001f};
 
    while(cnt < 600){
        cnt+= 1;
        SDL_FillRect(screen, &screen->clip_rect, col[cnt % 3]);
        GFX_Flip(screen);
        SDL_Delay(1000 / 60);
    }
  
    GFX_FreeSurface(screen);
    GFX_Quit();
    SDL_Quit();
    return 0;
}