static void tcx_update_display(void *opaque) { TCXState *ts = opaque; ram_addr_t page, page_min, page_max; int y, y_start, dd, ds; uint8_t *d, *s; void (*f)(TCXState *s1, uint8_t *dst, const uint8_t *src, int width); if (ts->ds->depth == 0) return; page = ts->vram_offset; y_start = -1; page_min = 0xffffffff; page_max = 0; d = ts->ds->data; s = ts->vram; dd = ts->ds->linesize; ds = 1024; switch (ts->ds->depth) { case 32: f = tcx_draw_line32; break; case 15: case 16: f = tcx_draw_line16; break; default: case 8: f = tcx_draw_line8; break; case 0: return; } for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE) { if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG)) { if (y_start < 0) y_start = y; if (page < page_min) page_min = page; if (page > page_max) page_max = page; f(ts, d, s, ts->width); d += dd; s += ds; f(ts, d, s, ts->width); d += dd; s += ds; f(ts, d, s, ts->width); d += dd; s += ds; f(ts, d, s, ts->width); d += dd; s += ds; } else { if (y_start >= 0) { /* flush to display */ dpy_update(ts->ds, 0, y_start, ts->width, y - y_start); y_start = -1; } d += dd * 4; s += ds * 4; } } if (y_start >= 0) { /* flush to display */ dpy_update(ts->ds, 0, y_start, ts->width, y - y_start); } /* reset modified pages */ if (page_min <= page_max) { cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE, VGA_DIRTY_FLAG); } }