root / hw / display / framebuffer.c @ 052e87b0
History | View | Annotate | Download (3.3 kB)
1 |
/*
|
---|---|
2 |
* Framebuffer device helper routines
|
3 |
*
|
4 |
* Copyright (c) 2009 CodeSourcery
|
5 |
* Written by Paul Brook <paul@codesourcery.com>
|
6 |
*
|
7 |
* This code is licensed under the GNU GPLv2.
|
8 |
*
|
9 |
* Contributions after 2012-01-13 are licensed under the terms of the
|
10 |
* GNU GPL, version 2 or (at your option) any later version.
|
11 |
*/
|
12 |
|
13 |
/* TODO:
|
14 |
- Do something similar for framebuffers with local ram
|
15 |
- Handle rotation here instead of hacking dest_pitch
|
16 |
- Use common pixel conversion routines instead of per-device drawfn
|
17 |
- Remove all DisplayState knowledge from devices.
|
18 |
*/
|
19 |
|
20 |
#include "hw/hw.h" |
21 |
#include "ui/console.h" |
22 |
#include "framebuffer.h" |
23 |
|
24 |
/* Render an image from a shared memory framebuffer. */
|
25 |
|
26 |
void framebuffer_update_display(
|
27 |
DisplaySurface *ds, |
28 |
MemoryRegion *address_space, |
29 |
hwaddr base, |
30 |
int cols, /* Width in pixels. */ |
31 |
int rows, /* Height in pixels. */ |
32 |
int src_width, /* Length of source line, in bytes. */ |
33 |
int dest_row_pitch, /* Bytes between adjacent horizontal output pixels. */ |
34 |
int dest_col_pitch, /* Bytes between adjacent vertical output pixels. */ |
35 |
int invalidate, /* nonzero to redraw the whole image. */ |
36 |
drawfn fn, |
37 |
void *opaque,
|
38 |
int *first_row, /* Input and output. */ |
39 |
int *last_row /* Output only */) |
40 |
{ |
41 |
hwaddr src_len; |
42 |
uint8_t *dest; |
43 |
uint8_t *src; |
44 |
uint8_t *src_base; |
45 |
int first, last = 0; |
46 |
int dirty;
|
47 |
int i;
|
48 |
ram_addr_t addr; |
49 |
MemoryRegionSection mem_section; |
50 |
MemoryRegion *mem; |
51 |
|
52 |
i = *first_row; |
53 |
*first_row = -1;
|
54 |
src_len = src_width * rows; |
55 |
|
56 |
mem_section = memory_region_find(address_space, base, src_len); |
57 |
if (int128_get64(mem_section.size) != src_len ||
|
58 |
!memory_region_is_ram(mem_section.mr)) { |
59 |
return;
|
60 |
} |
61 |
mem = mem_section.mr; |
62 |
assert(mem); |
63 |
assert(mem_section.offset_within_address_space == base); |
64 |
|
65 |
memory_region_sync_dirty_bitmap(mem); |
66 |
src_base = cpu_physical_memory_map(base, &src_len, 0);
|
67 |
/* If we can't map the framebuffer then bail. We could try harder,
|
68 |
but it's not really worth it as dirty flag tracking will probably
|
69 |
already have failed above. */
|
70 |
if (!src_base)
|
71 |
return;
|
72 |
if (src_len != src_width * rows) {
|
73 |
cpu_physical_memory_unmap(src_base, src_len, 0, 0); |
74 |
return;
|
75 |
} |
76 |
src = src_base; |
77 |
dest = surface_data(ds); |
78 |
if (dest_col_pitch < 0) |
79 |
dest -= dest_col_pitch * (cols - 1);
|
80 |
if (dest_row_pitch < 0) { |
81 |
dest -= dest_row_pitch * (rows - 1);
|
82 |
} |
83 |
first = -1;
|
84 |
addr = mem_section.offset_within_region; |
85 |
|
86 |
addr += i * src_width; |
87 |
src += i * src_width; |
88 |
dest += i * dest_row_pitch; |
89 |
|
90 |
for (; i < rows; i++) {
|
91 |
dirty = memory_region_get_dirty(mem, addr, src_width, |
92 |
DIRTY_MEMORY_VGA); |
93 |
if (dirty || invalidate) {
|
94 |
fn(opaque, dest, src, cols, dest_col_pitch); |
95 |
if (first == -1) |
96 |
first = i; |
97 |
last = i; |
98 |
} |
99 |
addr += src_width; |
100 |
src += src_width; |
101 |
dest += dest_row_pitch; |
102 |
} |
103 |
cpu_physical_memory_unmap(src_base, src_len, 0, 0); |
104 |
if (first < 0) { |
105 |
return;
|
106 |
} |
107 |
memory_region_reset_dirty(mem, mem_section.offset_within_region, src_len, |
108 |
DIRTY_MEMORY_VGA); |
109 |
*first_row = first; |
110 |
*last_row = last; |
111 |
} |