void gwinBlitArea(GHandle gh, coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t srcx, coord_t srcy, coord_t srccx, const pixel_t *buffer) {
if (!((gh->flags & GWIN_FLG_VISIBLE)))
return;
#if GDISP_NEED_CLIP
gdispSetClip(gh->x, gh->y, gh->width, gh->height);
#endif
gdispBlitAreaEx(gh->x+x, gh->y+y, cx, cy, srcx, srcy, srccx, buffer);
}
gdispImageError gdispImageDraw_NATIVE(gdispImage *img, coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t sx, coord_t sy) {
coord_t mx, mcx;
size_t pos, len;
/* Check some reasonableness */
if (sx >= img->width || sy >= img->height) return GDISP_IMAGE_ERR_OK;
if (sx + cx > img->width) cx = img->width - sx;
if (sy + cy > img->height) cy = img->height - sy;
/* Draw from the image cache - if it exists */
if (img->priv->frame0cache) {
gdispBlitAreaEx(x, y, cx, cy, sx, sy, img->width, img->priv->frame0cache);
return GDISP_IMAGE_ERR_OK;
}
/* For this image decoder we cheat and just seek straight to the region we want to display */
pos = FRAME0POS + (img->width * sy + cx) * sizeof(pixel_t);
/* Cycle through the lines */
for(; cy; cy--, y++) {
/* Move to the start of the line */
img->io.fns->seek(&img->io, pos);
/* Draw the line in chunks using BitBlt */
for(mx = x, mcx = cx; mcx > 0; mcx -= len, mx += len) {
// Read the data
len = img->io.fns->read(&img->io,
img->priv->buf,
mx > BLIT_BUFFER_SIZE ? (BLIT_BUFFER_SIZE*sizeof(pixel_t)) : (mx * sizeof(pixel_t)))
/ sizeof(pixel_t);
if (!len)
return GDISP_IMAGE_ERR_BADDATA;
/* Blit the chunk of data */
gdispBlitAreaEx(mx, y, len, 1, 0, 0, len, img->priv->buf);
}
/* Get the position for the start of the next line */
pos += img->width*sizeof(pixel_t);
}
return GDISP_IMAGE_ERR_OK;
}
