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 "qemu/osdep.h" |
21 | #include "ui/console.h" |
22 | #include "framebuffer.h" |
23 | |
24 | void framebuffer_update_memory_section( |
25 | MemoryRegionSection *mem_section, |
26 | MemoryRegion *root, |
27 | hwaddr base, |
28 | unsigned rows, |
29 | unsigned src_width) |
30 | { |
31 | hwaddr src_len = (hwaddr)rows * src_width; |
32 | |
33 | if (mem_section->mr) { |
34 | memory_region_set_log(mem_section->mr, false, DIRTY_MEMORY_VGA); |
35 | memory_region_unref(mem_section->mr); |
36 | mem_section->mr = NULL; |
37 | } |
38 | |
39 | *mem_section = memory_region_find(root, base, src_len); |
40 | if (!mem_section->mr) { |
41 | return; |
42 | } |
43 | |
44 | if (int128_get64(mem_section->size) < src_len || |
45 | !memory_region_is_ram(mem_section->mr)) { |
46 | memory_region_unref(mem_section->mr); |
47 | mem_section->mr = NULL; |
48 | return; |
49 | } |
50 | |
51 | memory_region_set_log(mem_section->mr, true, DIRTY_MEMORY_VGA); |
52 | } |
53 | |
54 | /* Render an image from a shared memory framebuffer. */ |
55 | void framebuffer_update_display( |
56 | DisplaySurface *ds, |
57 | MemoryRegionSection *mem_section, |
58 | int cols, /* Width in pixels. */ |
59 | int rows, /* Height in pixels. */ |
60 | int src_width, /* Length of source line, in bytes. */ |
61 | int dest_row_pitch, /* Bytes between adjacent horizontal output pixels. */ |
62 | int dest_col_pitch, /* Bytes between adjacent vertical output pixels. */ |
63 | int invalidate, /* nonzero to redraw the whole image. */ |
64 | drawfn fn, |
65 | void *opaque, |
66 | int *first_row, /* Input and output. */ |
67 | int *last_row /* Output only */) |
68 | { |
69 | DirtyBitmapSnapshot *snap; |
70 | uint8_t *dest; |
71 | uint8_t *src; |
72 | int first, last = 0; |
73 | int dirty; |
74 | int i; |
75 | ram_addr_t addr; |
76 | MemoryRegion *mem; |
77 | |
78 | i = *first_row; |
79 | *first_row = -1; |
80 | |
81 | mem = mem_section->mr; |
82 | if (!mem) { |
83 | return; |
84 | } |
85 | |
86 | addr = mem_section->offset_within_region; |
87 | src = memory_region_get_ram_ptr(mem) + addr; |
88 | |
89 | dest = surface_data(ds); |
90 | if (dest_col_pitch < 0) { |
91 | dest -= dest_col_pitch * (cols - 1); |
92 | } |
93 | if (dest_row_pitch < 0) { |
94 | dest -= dest_row_pitch * (rows - 1); |
95 | } |
96 | first = -1; |
97 | |
98 | addr += i * src_width; |
99 | src += i * src_width; |
100 | dest += i * dest_row_pitch; |
101 | |
102 | snap = memory_region_snapshot_and_clear_dirty(mem, addr, src_width * rows, |
103 | DIRTY_MEMORY_VGA); |
104 | for (; i < rows; i++) { |
105 | dirty = memory_region_snapshot_get_dirty(mem, snap, addr, src_width); |
106 | if (dirty || invalidate) { |
107 | fn(opaque, dest, src, cols, dest_col_pitch); |
108 | if (first == -1) |
109 | first = i; |
110 | last = i; |
111 | } |
112 | addr += src_width; |
113 | src += src_width; |
114 | dest += dest_row_pitch; |
115 | } |
116 | g_free(snap); |
117 | if (first < 0) { |
118 | return; |
119 | } |
120 | *first_row = first; |
121 | *last_row = last; |
122 | } |
123 | |