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1 | /* |
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2 | * video output handling using plugin_lib |
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3 | * (C) GraÅžvydas "notaz" Ignotas, 2011 |
4 | * |
5 | * This work is licensed under the terms of any of these licenses |
6 | * (at your option): |
7 | * - GNU GPL, version 2 or later. |
8 | * - GNU LGPL, version 2.1 or later. |
9 | * See the COPYING file in the top-level directory. |
10 | */ |
11 | |
12 | #include "gpu.h" |
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13 | #include "cspace.h" |
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14 | #include "../../frontend/plugin_lib.h" |
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15 | |
16 | static const struct rearmed_cbs *cbs; |
17 | static void *screen_buf; |
18 | |
19 | int vout_init(void) |
20 | { |
21 | return 0; |
22 | } |
23 | |
24 | int vout_finish(void) |
25 | { |
26 | return 0; |
27 | } |
28 | |
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29 | static void check_mode_change(void) |
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30 | { |
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31 | static uint32_t old_status; |
32 | static int old_h; |
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33 | |
34 | // width|rgb24 change? |
35 | if ((gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || gpu.screen.h != old_h) |
36 | { |
37 | old_status = gpu.status.reg; |
38 | old_h = gpu.screen.h; |
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39 | screen_buf = cbs->pl_vout_set_mode(gpu.screen.hres, gpu.screen.h, |
40 | (gpu.status.rgb24 && !cbs->only_16bpp) ? 24 : 16); |
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41 | } |
42 | } |
43 | |
44 | static void blit(void) |
45 | { |
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46 | int x = gpu.screen.x & ~1; // alignment needed by blitter |
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47 | int y = gpu.screen.y; |
48 | int w = gpu.screen.w; |
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49 | int h = gpu.screen.h; |
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50 | uint16_t *vram = gpu.vram; |
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51 | int stride = gpu.screen.hres; |
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52 | int fb_offs, doffs; |
53 | uint8_t *dest; |
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54 | |
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55 | fb_offs = y * 1024 + x; |
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56 | dest = (uint8_t *)screen_buf; |
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57 | |
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58 | // only do centering, at least for now |
59 | doffs = (stride - w) / 2 & ~1; |
60 | |
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61 | if (gpu.status.rgb24) |
62 | { |
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63 | if (cbs->only_16bpp) { |
64 | dest += doffs * 2; |
65 | for (; h-- > 0; dest += stride * 2, fb_offs += 1024) |
66 | { |
67 | fb_offs &= 1024*512-1; |
68 | bgr888_to_rgb565(dest, vram + fb_offs, w * 3); |
69 | } |
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70 | } |
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71 | else { |
72 | dest += (doffs / 8) * 24; |
73 | for (; h-- > 0; dest += stride * 3, fb_offs += 1024) |
74 | { |
75 | fb_offs &= 1024*512-1; |
76 | bgr888_to_rgb888(dest, vram + fb_offs, w * 3); |
77 | } |
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78 | } |
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79 | } |
80 | else |
81 | { |
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82 | dest += doffs * 2; |
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83 | for (; h-- > 0; dest += stride * 2, fb_offs += 1024) |
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84 | { |
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85 | fb_offs &= 1024*512-1; |
86 | bgr555_to_rgb565(dest, vram + fb_offs, w * 2); |
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87 | } |
88 | } |
89 | |
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90 | screen_buf = cbs->pl_vout_flip(); |
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91 | } |
92 | |
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93 | void vout_update(void) |
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94 | { |
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95 | check_mode_change(); |
96 | if (cbs->pl_vout_raw_flip) |
97 | cbs->pl_vout_raw_flip(gpu.screen.x, gpu.screen.y); |
98 | else |
99 | blit(); |
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100 | } |
101 | |
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102 | long GPUopen(void **unused) |
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103 | { |
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104 | gpu.frameskip.active = 0; |
105 | gpu.frameskip.frame_ready = 1; |
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106 | |
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107 | cbs->pl_vout_open(); |
108 | screen_buf = cbs->pl_vout_flip(); |
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109 | return 0; |
110 | } |
111 | |
112 | long GPUclose(void) |
113 | { |
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114 | cbs->pl_vout_close(); |
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115 | return 0; |
116 | } |
117 | |
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118 | void vout_set_config(const struct rearmed_cbs *cbs_) |
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119 | { |
120 | cbs = cbs_; |
121 | } |
122 | |
123 | // vim:shiftwidth=2:expandtab |