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- /*
- * Framebuffer device helper routines
- *
- * Copyright (c) 2009 CodeSourcery
- * Written by Paul Brook <paul@codesourcery.com>
- *
- * This code is licensed under the GNU GPLv2.
- *
- * Contributions after 2012-01-13 are licensed under the terms of the
- * GNU GPL, version 2 or (at your option) any later version.
- */
- /* TODO:
- - Do something similar for framebuffers with local ram
- - Handle rotation here instead of hacking dest_pitch
- - Use common pixel conversion routines instead of per-device drawfn
- - Remove all DisplayState knowledge from devices.
- */
- #include "qemu/osdep.h"
- #include "ui/console.h"
- #include "framebuffer.h"
- void framebuffer_update_memory_section(
- MemoryRegionSection *mem_section,
- MemoryRegion *root,
- hwaddr base,
- unsigned rows,
- unsigned src_width)
- {
- hwaddr src_len = (hwaddr)rows * src_width;
- if (mem_section->mr) {
- memory_region_set_log(mem_section->mr, false, DIRTY_MEMORY_VGA);
- memory_region_unref(mem_section->mr);
- mem_section->mr = NULL;
- }
- *mem_section = memory_region_find(root, base, src_len);
- if (!mem_section->mr) {
- return;
- }
- if (int128_get64(mem_section->size) < src_len ||
- !memory_region_is_ram(mem_section->mr)) {
- memory_region_unref(mem_section->mr);
- mem_section->mr = NULL;
- return;
- }
- memory_region_set_log(mem_section->mr, true, DIRTY_MEMORY_VGA);
- }
- /* Render an image from a shared memory framebuffer. */
- void framebuffer_update_display(
- DisplaySurface *ds,
- MemoryRegionSection *mem_section,
- int cols, /* Width in pixels. */
- int rows, /* Height in pixels. */
- int src_width, /* Length of source line, in bytes. */
- int dest_row_pitch, /* Bytes between adjacent horizontal output pixels. */
- int dest_col_pitch, /* Bytes between adjacent vertical output pixels. */
- int invalidate, /* nonzero to redraw the whole image. */
- drawfn fn,
- void *opaque,
- int *first_row, /* Input and output. */
- int *last_row /* Output only */)
- {
- DirtyBitmapSnapshot *snap;
- uint8_t *dest;
- uint8_t *src;
- int first, last = 0;
- int dirty;
- int i;
- ram_addr_t addr;
- MemoryRegion *mem;
- i = *first_row;
- *first_row = -1;
- mem = mem_section->mr;
- if (!mem) {
- return;
- }
- addr = mem_section->offset_within_region;
- src = memory_region_get_ram_ptr(mem) + addr;
- dest = surface_data(ds);
- if (dest_col_pitch < 0) {
- dest -= dest_col_pitch * (cols - 1);
- }
- if (dest_row_pitch < 0) {
- dest -= dest_row_pitch * (rows - 1);
- }
- first = -1;
- addr += i * src_width;
- src += i * src_width;
- dest += i * dest_row_pitch;
- snap = memory_region_snapshot_and_clear_dirty(mem, addr, src_width * rows,
- DIRTY_MEMORY_VGA);
- for (; i < rows; i++) {
- dirty = memory_region_snapshot_get_dirty(mem, snap, addr, src_width);
- if (dirty || invalidate) {
- fn(opaque, dest, src, cols, dest_col_pitch);
- if (first == -1)
- first = i;
- last = i;
- }
- addr += src_width;
- src += src_width;
- dest += dest_row_pitch;
- }
- g_free(snap);
- if (first < 0) {
- return;
- }
- *first_row = first;
- *last_row = last;
- }
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