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1 | 714fa308 | pbrook | /*
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2 | 714fa308 | pbrook | * Framebuffer device helper routines
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3 | 714fa308 | pbrook | *
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4 | 714fa308 | pbrook | * Copyright (c) 2009 CodeSourcery
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5 | 714fa308 | pbrook | * Written by Paul Brook <paul@codesourcery.com>
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6 | 714fa308 | pbrook | *
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7 | 714fa308 | pbrook | * This code is licensed under the GNU GPLv2.
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8 | 6b620ca3 | Paolo Bonzini | *
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9 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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10 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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11 | 714fa308 | pbrook | */
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12 | 714fa308 | pbrook | |
13 | 714fa308 | pbrook | /* TODO:
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14 | 714fa308 | pbrook | - Do something similar for framebuffers with local ram
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15 | 714fa308 | pbrook | - Handle rotation here instead of hacking dest_pitch
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16 | 714fa308 | pbrook | - Use common pixel conversion routines instead of per-device drawfn
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17 | 714fa308 | pbrook | - Remove all DisplayState knowledge from devices.
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18 | 714fa308 | pbrook | */
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19 | 714fa308 | pbrook | |
20 | 714fa308 | pbrook | #include "hw.h" |
21 | 714fa308 | pbrook | #include "console.h" |
22 | 714fa308 | pbrook | #include "framebuffer.h" |
23 | 714fa308 | pbrook | |
24 | 714fa308 | pbrook | /* Render an image from a shared memory framebuffer. */
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25 | 714fa308 | pbrook | |
26 | 714fa308 | pbrook | void framebuffer_update_display(
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27 | 714fa308 | pbrook | DisplayState *ds, |
28 | 75c9d6c2 | Avi Kivity | MemoryRegion *address_space, |
29 | c227f099 | Anthony Liguori | target_phys_addr_t base, |
30 | 714fa308 | pbrook | int cols, /* Width in pixels. */ |
31 | 714fa308 | pbrook | int rows, /* Leight in pixels. */ |
32 | 714fa308 | pbrook | int src_width, /* Length of source line, in bytes. */ |
33 | 714fa308 | pbrook | int dest_row_pitch, /* Bytes between adjacent horizontal output pixels. */ |
34 | 714fa308 | pbrook | int dest_col_pitch, /* Bytes between adjacent vertical output pixels. */ |
35 | 714fa308 | pbrook | int invalidate, /* nonzero to redraw the whole image. */ |
36 | 714fa308 | pbrook | drawfn fn, |
37 | 714fa308 | pbrook | void *opaque,
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38 | 714fa308 | pbrook | int *first_row, /* Input and output. */ |
39 | 714fa308 | pbrook | int *last_row /* Output only */) |
40 | 714fa308 | pbrook | { |
41 | c227f099 | Anthony Liguori | target_phys_addr_t src_len; |
42 | 714fa308 | pbrook | uint8_t *dest; |
43 | 714fa308 | pbrook | uint8_t *src; |
44 | 714fa308 | pbrook | uint8_t *src_base; |
45 | 714fa308 | pbrook | int first, last = 0; |
46 | 714fa308 | pbrook | int dirty;
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47 | 714fa308 | pbrook | int i;
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48 | c227f099 | Anthony Liguori | ram_addr_t addr; |
49 | 75c9d6c2 | Avi Kivity | MemoryRegionSection mem_section; |
50 | 75c9d6c2 | Avi Kivity | MemoryRegion *mem; |
51 | 714fa308 | pbrook | |
52 | 714fa308 | pbrook | i = *first_row; |
53 | 714fa308 | pbrook | *first_row = -1;
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54 | 714fa308 | pbrook | src_len = src_width * rows; |
55 | 714fa308 | pbrook | |
56 | 75c9d6c2 | Avi Kivity | mem_section = memory_region_find(address_space, base, src_len); |
57 | 75c9d6c2 | Avi Kivity | if (mem_section.size != src_len || !memory_region_is_ram(mem_section.mr)) {
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58 | 714fa308 | pbrook | return;
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59 | 714fa308 | pbrook | } |
60 | 75c9d6c2 | Avi Kivity | mem = mem_section.mr; |
61 | 75c9d6c2 | Avi Kivity | assert(mem); |
62 | 75c9d6c2 | Avi Kivity | assert(mem_section.offset_within_address_space == base); |
63 | 714fa308 | pbrook | |
64 | c1cd0b2c | Avi Kivity | memory_region_sync_dirty_bitmap(mem); |
65 | 714fa308 | pbrook | src_base = cpu_physical_memory_map(base, &src_len, 0);
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66 | 714fa308 | pbrook | /* If we can't map the framebuffer then bail. We could try harder,
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67 | 714fa308 | pbrook | but it's not really worth it as dirty flag tracking will probably
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68 | 714fa308 | pbrook | already have failed above. */
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69 | 714fa308 | pbrook | if (!src_base)
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70 | 714fa308 | pbrook | return;
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71 | 714fa308 | pbrook | if (src_len != src_width * rows) {
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72 | 714fa308 | pbrook | cpu_physical_memory_unmap(src_base, src_len, 0, 0); |
73 | 714fa308 | pbrook | return;
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74 | 714fa308 | pbrook | } |
75 | 714fa308 | pbrook | src = src_base; |
76 | 714fa308 | pbrook | dest = ds_get_data(ds); |
77 | 714fa308 | pbrook | if (dest_col_pitch < 0) |
78 | 714fa308 | pbrook | dest -= dest_col_pitch * (cols - 1);
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79 | 9312805d | Vasily Khoruzhick | if (dest_row_pitch < 0) { |
80 | 9312805d | Vasily Khoruzhick | dest -= dest_row_pitch * (rows - 1);
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81 | 9312805d | Vasily Khoruzhick | } |
82 | 714fa308 | pbrook | first = -1;
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83 | 75c9d6c2 | Avi Kivity | addr = mem_section.offset_within_region; |
84 | 714fa308 | pbrook | |
85 | 714fa308 | pbrook | addr += i * src_width; |
86 | 714fa308 | pbrook | src += i * src_width; |
87 | 714fa308 | pbrook | dest += i * dest_row_pitch; |
88 | 714fa308 | pbrook | |
89 | 714fa308 | pbrook | for (; i < rows; i++) {
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90 | cd7a45c9 | Blue Swirl | dirty = memory_region_get_dirty(mem, addr, addr + src_width, |
91 | 75c9d6c2 | Avi Kivity | DIRTY_MEMORY_VGA); |
92 | 714fa308 | pbrook | if (dirty || invalidate) {
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93 | 714fa308 | pbrook | fn(opaque, dest, src, cols, dest_col_pitch); |
94 | 714fa308 | pbrook | if (first == -1) |
95 | 714fa308 | pbrook | first = i; |
96 | 714fa308 | pbrook | last = i; |
97 | 714fa308 | pbrook | } |
98 | 714fa308 | pbrook | addr += src_width; |
99 | 714fa308 | pbrook | src += src_width; |
100 | 714fa308 | pbrook | dest += dest_row_pitch; |
101 | 714fa308 | pbrook | } |
102 | 714fa308 | pbrook | cpu_physical_memory_unmap(src_base, src_len, 0, 0); |
103 | 714fa308 | pbrook | if (first < 0) { |
104 | 714fa308 | pbrook | return;
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105 | 714fa308 | pbrook | } |
106 | 75c9d6c2 | Avi Kivity | memory_region_reset_dirty(mem, mem_section.offset_within_region, src_len, |
107 | 75c9d6c2 | Avi Kivity | DIRTY_MEMORY_VGA); |
108 | 714fa308 | pbrook | *first_row = first; |
109 | 714fa308 | pbrook | *last_row = last; |
110 | 714fa308 | pbrook | return;
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111 | 714fa308 | pbrook | } |