+ if((psx_gpu->interlace_mode & RENDER_INTERLACE_ENABLED) &&
+ (psx_gpu->primitive_type == PRIMITIVE_TYPE_SPRITE))
+ {
+ u32 num_blocks_dest = 0;
+ block_struct *block_src = psx_gpu->blocks;
+ block_struct *block_dest = psx_gpu->blocks;
+
+ u16 *vram_ptr = psx_gpu->vram_ptr;
+ u32 i;
+
+ if(psx_gpu->interlace_mode & RENDER_INTERLACE_ODD)
+ {
+ for(i = 0; i < psx_gpu->num_blocks; i++)
+ {
+ u32 fb_offset = (u32)((u8 *)block_src->fb_ptr - (u8 *)vram_ptr);
+ if(fb_offset & (1 << 11))
+ {
+ *block_dest = *block_src;
+ num_blocks_dest++;
+ block_dest++;
+ }
+ block_src++;
+ }
+ }
+ else
+ {
+ for(i = 0; i < psx_gpu->num_blocks; i++)
+ {
+ u32 fb_offset = (u32)((u8 *)block_src->fb_ptr - (u8 *)vram_ptr);
+ if((fb_offset & (1 << 11)) == 0)
+ {
+ *block_dest = *block_src;
+ num_blocks_dest++;
+ block_dest++;
+ }
+ block_src++;
+ }
+ }
+
+ psx_gpu->num_blocks = num_blocks_dest;
+ }
+