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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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