RK3399Pro入门教程（5）图形加速引擎RGA的使用 - Toybrick

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<div>int createDrmMap(int drm_fd, int bpp, int width, int height, struct fdmmap_s *map)</div><div>{</div><div>struct drm_mode_create_dumb arg;</div><div>struct drm_mode_map_dumb map_arg;</div><div>int ret;</div><div>memset(&arg, 0, sizeof(arg));</div><div>arg.bpp = bpp;</div><div>arg.width = width;</div><div>arg.height = height;</div><div>printf("bpp=%d, width=%d, height=%d\n", arg.bpp, arg.width, arg.height);</div><div>ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg);</div><div>if (ret) {</div><div>perror("failed to create dumb buffer");</div><div>return ret;</div><div>}</div><div>map->handle = arg.handle;</div><div>map->size = arg.size;</div><div>map->pitch = arg.pitch;</div><div>printf("bpp=%d, width=%d, height=%d, size=%d, pitch=%d\n", arg.bpp, arg.width, arg.height, arg.size, arg.pitch);</div>
<div>memset(&map_arg, 0, sizeof(map_arg));</div><div>map_arg.handle = map->handle;</div><div>ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);</div><div>if (ret)</div><div>return ret;</div><div>map->buf = (char *)mmap(0, map->size, PROT_READ | PROT_WRITE, MAP_SHARED, drm_fd, map_arg.offset);</div><div>if (map->buf == MAP_FAILED)</div><div>return -1;</div><div>drmPrimeHandleToFD(drm_fd, map->handle, 0, &map->fd);</div><div>printf("drm_fd=%d, map->fd=%d\n", drm_fd, map->fd);</div><div>return 0;</div><div>}</div><div>int main(int argc, char argv[])</div><div>{</div><div> int drm_fd, ret;</div><div> drm_fd = open("/dev/dri/card0", O_RDWR, 0);</div><div> if( drm_fd <=0)</div><div> {</div><div> perror("open dri card0");</div><div> return -1;</div><div> }</div><div> if( createDrmMap(drm_fd, get_bpp_from_format(SRC_FORMAT), SRC_WIDTH, SRC_HEIGHT, &map_src)<0)</div><div> {</div><div> printf("createDrmMap map_src error\n");</div><div> return -1;</div><div> }</div><div> printf("map_src.size=%d\n", map_src.size);</div><div> if( createDrmMap(drm_fd, get_bpp_from_format(DST_FORMAT), DST_WIDTH, DST_HEIGHT, &map_dst)<0)</div><div> {</div><div> printf("createDrmMap map_dst error\n");</div><div> return -2;</div><div> }</div><div>printf("createDrmMap map_src/map_dst ok\n");</div>
<div> ret = get_buf_from_file(map_src.buf, SRC_FORMAT, SRC_WIDTH, SRC_HEIGHT, 0);</div><div> if (!ret)</div><div> printf("open src file ok\n");</div><div> else</div><div> printf ("can not open file\n");</div><div> if(MODE == MODE_BLEND || MODE == MODE_FILL) {</div><div> ret = get_buf_from_file(map_dst.buf, DST_FORMAT, DST_WIDTH, DST_HEIGHT, 1);</div><div> if (!ret)</div><div> printf("open dst file\n");</div><div> else</div><div> printf ("can not open file\n");</div><div> } else {</div><div> printf("map_dst.size=%d, get_bpp_from_format(DST_FORMAT)=%d\n", map_dst.size, get_bpp_from_format(DST_FORMAT));</div><div> memset(map_dst.buf,0x00,map_dst.size);</div><div> // memset(map_dst.buf,0x00,DST_WIDTH*DST_HEIGHT*get_bpp_from_format(DST_FORMAT));</div><div> }</div><div> printf("get_buf_from_file ok\n");</div><div> src = wrapbuffer_fd(map_src.fd, SRC_WIDTH, SRC_HEIGHT, SRC_FORMAT);</div><div> dst = wrapbuffer_fd(map_dst.fd, DST_WIDTH, DST_HEIGHT, DST_FORMAT);</div><div> ......</div><div>}</div></div>