+\r
+ // render box bounds. y does not need modification, but x and width must be multiple of 4\r
+ if (x >= overdraw) rx = (x - overdraw) & (~3);\r
+ else rx = -(GVARVIDEO->page[0].dx);\r
+ if (y >= overdraw) ry = (y - overdraw);\r
+ else ry = -(GVARVIDEO->page[0].dy);\r
+ h = spri->sprite_vrl_cont->vrl_header->height + overdraw + y - ry;\r
+ w = (x + spri->sprite_vrl_cont->vrl_header->width + (overdraw*2) + 3 - rx) & (~3);//round up\r
+ if ((rx+w) > GVARVIDEO->page[0].width) w = GVARVIDEO->page[0].width-rx;\r
+ if ((ry+h) > GVARVIDEO->page[0].height) h = GVARVIDEO->page[0].height-ry;\r
+\r
+ // block copy pattern to where we will draw the sprite\r
+ vga_setup_wm1_block_copy();\r
+ o2 = VMEMPAGESIZE2;\r
+ o = (0x10000UL - (uint16_t)VMEMPAGEDATA2) + (ry * GVARVIDEO->page[0].stridew) + (rx >> 2); // source offscreen\r
+ for (i=0;i < h;i++,o += GVARVIDEO->page[0].stridew,o2 += (w >> 2)) vga_wm1_mem_block_copy(o2,o,w >> 2);\r
+\r
+ // must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally\r
+ vga_restore_rm0wm0();\r
+\r
+ // replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0)\r
+ vga_state.vga_draw_stride_limit = (GVARVIDEO->page[0].width + 3 - x) >> 2;//round up\r
+ vga_state.vga_draw_stride = w >> 2;\r
+ vga_state.vga_graphics_ram = omemptr + VMEMPAGESIZE2;\r
+\r
+ // then the sprite. note modding ram ptr means we just draw to (x&3,0)\r
+#ifndef SPRITE\r
+ modexClearRegion(&GVARVIDEO->page[0], x, y, 16, 32, 1);\r
+#else\r
+ draw_vrl1_vgax_modex(\r
+ x-rx,\r
+ y-ry,\r
+ spri->sprite_vrl_cont->vrl_header,\r
+ spri->sprite_vrl_cont->line_offsets,\r
+ spri->sprite_vrl_cont->buffer + sizeof(struct vrl1_vgax_header),\r
+ spri->sprite_vrl_cont->data_size\r
+ );\r
+#endif\r
+ // restore ptr\r
+ vga_state.vga_graphics_ram = omemptr;\r
+\r
+ // block copy to visible RAM from offscreen\r
+ vga_setup_wm1_block_copy();\r
+ o = VMEMPAGESIZE2; // source offscreen\r
+ o2 = (ry * GVARVIDEO->page[0].stridew) + (rx >> 2); // dest visible (original stride)\r
+ for (i=0;i < h;i++,o += vga_state.vga_draw_stride,o2 += GVARVIDEO->page[0].stridew) vga_wm1_mem_block_copy(o2,o,w >> 2);\r
+ // must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally\r
+ vga_restore_rm0wm0();\r
+\r
+ // restore stride\r
+ vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = GVARVIDEO->page[0].stridew;\r