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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 | |
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12 | #include <string.h> |
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13 | #include "gpu.h" |
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14 | #include "cspace.h" |
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15 | #include "../../frontend/plugin_lib.h" |
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16 | |
17 | static const struct rearmed_cbs *cbs; |
18 | static void *screen_buf; |
19 | |
20 | int vout_init(void) |
21 | { |
22 | return 0; |
23 | } |
24 | |
25 | int vout_finish(void) |
26 | { |
27 | return 0; |
28 | } |
29 | |
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30 | static void check_mode_change(void) |
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31 | { |
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32 | static uint32_t old_status; |
33 | static int old_h; |
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34 | |
35 | // width|rgb24 change? |
36 | if ((gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || gpu.screen.h != old_h) |
37 | { |
38 | old_status = gpu.status.reg; |
39 | old_h = gpu.screen.h; |
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40 | screen_buf = cbs->pl_vout_set_mode(gpu.screen.hres, gpu.screen.h, |
41 | (gpu.status.rgb24 && !cbs->only_16bpp) ? 24 : 16); |
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42 | } |
43 | } |
44 | |
45 | static void blit(void) |
46 | { |
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47 | int x = gpu.screen.x & ~1; // alignment needed by blitter |
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48 | int y = gpu.screen.y; |
49 | int w = gpu.screen.w; |
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50 | int h = gpu.screen.h; |
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51 | uint16_t *vram = gpu.vram; |
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52 | int stride = gpu.screen.hres; |
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53 | int fb_offs, doffs; |
54 | uint8_t *dest; |
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55 | |
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56 | dest = (uint8_t *)screen_buf; |
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57 | if (dest == NULL) |
58 | return; |
59 | |
60 | fb_offs = y * 1024 + x; |
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61 | |
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62 | // only do centering, at least for now |
63 | doffs = (stride - w) / 2 & ~1; |
64 | |
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65 | if (gpu.status.rgb24) |
66 | { |
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67 | if (cbs->only_16bpp) { |
68 | dest += doffs * 2; |
69 | for (; h-- > 0; dest += stride * 2, fb_offs += 1024) |
70 | { |
71 | fb_offs &= 1024*512-1; |
72 | bgr888_to_rgb565(dest, vram + fb_offs, w * 3); |
73 | } |
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74 | } |
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75 | else { |
76 | dest += (doffs / 8) * 24; |
77 | for (; h-- > 0; dest += stride * 3, fb_offs += 1024) |
78 | { |
79 | fb_offs &= 1024*512-1; |
80 | bgr888_to_rgb888(dest, vram + fb_offs, w * 3); |
81 | } |
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82 | } |
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83 | } |
84 | else |
85 | { |
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86 | dest += doffs * 2; |
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87 | for (; h-- > 0; dest += stride * 2, fb_offs += 1024) |
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88 | { |
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89 | fb_offs &= 1024*512-1; |
90 | bgr555_to_rgb565(dest, vram + fb_offs, w * 2); |
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91 | } |
92 | } |
93 | |
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94 | screen_buf = cbs->pl_vout_flip(); |
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95 | } |
96 | |
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97 | void vout_update(void) |
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98 | { |
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99 | check_mode_change(); |
100 | if (cbs->pl_vout_raw_flip) |
101 | cbs->pl_vout_raw_flip(gpu.screen.x, gpu.screen.y); |
102 | else |
103 | blit(); |
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104 | } |
105 | |
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106 | void vout_blank(void) |
107 | { |
108 | check_mode_change(); |
109 | if (cbs->pl_vout_raw_flip == NULL) { |
110 | int bytespp = gpu.status.rgb24 ? 3 : 2; |
111 | memset(screen_buf, 0, gpu.screen.hres * gpu.screen.h * bytespp); |
112 | screen_buf = cbs->pl_vout_flip(); |
113 | } |
114 | } |
115 | |
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116 | long GPUopen(void **unused) |
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117 | { |
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118 | gpu.frameskip.active = 0; |
119 | gpu.frameskip.frame_ready = 1; |
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120 | |
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121 | cbs->pl_vout_open(); |
122 | screen_buf = cbs->pl_vout_flip(); |
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123 | return 0; |
124 | } |
125 | |
126 | long GPUclose(void) |
127 | { |
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128 | cbs->pl_vout_close(); |
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129 | return 0; |
130 | } |
131 | |
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132 | void vout_set_config(const struct rearmed_cbs *cbs_) |
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133 | { |
134 | cbs = cbs_; |
135 | } |
136 | |
137 | // vim:shiftwidth=2:expandtab |