mirror of https://gitee.com/openkylin/qemu.git
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
|
|
* 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;
|
|
}
|