void rot_bitmap_layer_update_func (Layer* l,GContext* ctx) {
ROT_BITMAP_GET;
GPoint topOffset=getTopOffset ();
setTopOffset(GPoint(0,0));
GRect rect=GRect(0,0,l->frame.size.w,l->frame.size.h);
SDL_Surface* sur=createSurface(rotbitmap->bitmap->bounds.size.w,rotbitmap->bitmap->bounds.size.h);
SDL_FillRect(sur,0,0);
graphics_context_set_compositing_mode (ctx,GCompOpAssign);
graphics_draw_bitmap_in_rect_to (ctx,rotbitmap->bitmap,rect,sur);
double angle=(double)rotbitmap->rotation/TRIG_MAX_ANGLE*360.0;
SDL_Surface* rotated=rotozoomSurface(sur,-angle,1.0,SMOOTHING_OFF);
SDL_FreeSurface(sur);
GPoint offset=getPivotRotationOffset(rotbitmap->bitmap->bounds.size,GSize(rotated->w,rotated->h),rotbitmap->src_ic,angle);
rotbitmap->dest_ic.x=l->frame.size.w/2; //TODO: Verify this
rotbitmap->dest_ic.y=l->frame.size.h/2;
setTopOffset(topOffset);
if (rotbitmap->corner_clip_color!=GColorClear) {
graphics_context_set_fill_color(ctx,rotbitmap->corner_clip_color);
graphics_fill_rect(ctx,GRect(0,0,l->frame.size.w,l->frame.size.h),0,0);
}
graphics_context_set_compositing_mode (ctx,rotbitmap->compositing_mode);
graphics_draw_surface_in_rect (ctx,rotated,GRect(rotbitmap->dest_ic.x-offset.x,rotbitmap->dest_ic.y-offset.y,rotated->w,rotated->h));
SDL_FreeSurface(rotated);
}
void rotbmp_layer_update_func (Layer* me,GContext* ctx) {
GPoint topOffset=getTopOffset ();
setTopOffset(GPoint(0,0));
GRect rect=GRect(0,0,me->frame.size.w,me->frame.size.h);
RotBitmapLayer* bitmapLayer=(RotBitmapLayer*)me;
SDL_Surface* bitmap=createSurface(bitmapLayer->bitmap->bounds.size.w,bitmapLayer->bitmap->bounds.size.h);
SDL_FillRect(bitmap,0,0);
graphics_context_set_compositing_mode (ctx,GCompOpAssign);
graphics_draw_bitmap_in_rect_to (ctx,bitmapLayer->bitmap,rect,bitmap);
double angle=(double)bitmapLayer->rotation/TRIG_MAX_ANGLE*360.0;
SDL_Surface* rotated=rotozoomSurface(bitmap,-angle,1.0,SMOOTHING_OFF);
SDL_FreeSurface(bitmap);
GPoint offset=getPivotRotationOffset(bitmapLayer->bitmap->bounds.size,GSize(rotated->w,rotated->h),bitmapLayer->src_ic,angle);
setTopOffset(topOffset);
graphics_context_set_compositing_mode (ctx,bitmapLayer->compositing_mode);
graphics_draw_surface_in_rect (ctx,rotated,GRect(bitmapLayer->dest_ic.x-offset.x,bitmapLayer->dest_ic.y-offset.y,rotated->w,rotated->h));
SDL_FreeSurface(rotated);
}