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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; |
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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(int force) |
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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 | int w = gpu.screen.hres; |
34 | int h = gpu.screen.h; |
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35 | int w_out = w; |
36 | int h_out = h; |
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37 | |
38 | gpu.state.enhancement_active = |
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39 | gpu.get_enhancement_bufer != NULL && gpu.state.enhancement_enable |
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40 | && w <= 512 && h <= 256 && !gpu.status.rgb24; |
41 | |
42 | if (gpu.state.enhancement_active) { |
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43 | w_out *= 2; |
44 | h_out *= 2; |
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45 | } |
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46 | |
47 | // width|rgb24 change? |
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48 | if (force || (gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || h != old_h) |
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49 | { |
50 | old_status = gpu.status.reg; |
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51 | old_h = h; |
52 | |
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53 | cbs->pl_vout_set_mode(w_out, h_out, w, h, gpu.status.rgb24 ? 24 : 16); |
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54 | } |
55 | } |
56 | |
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57 | void vout_update(void) |
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58 | { |
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59 | int x = gpu.screen.x & ~1; // alignment needed by blitter |
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60 | int y = gpu.screen.y; |
61 | int w = gpu.screen.w; |
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62 | int h = gpu.screen.h; |
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63 | uint16_t *vram = gpu.vram; |
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64 | int vram_h = 512; |
65 | |
66 | if (w == 0 || h == 0) |
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67 | return; |
68 | |
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69 | check_mode_change(0); |
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70 | if (gpu.state.enhancement_active) |
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71 | vram = gpu.get_enhancement_bufer(&x, &y, &w, &h, &vram_h); |
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72 | |
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73 | if (y + h > vram_h) { |
74 | if (y + h - vram_h > h / 2) { |
75 | // wrap |
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76 | h -= vram_h - y; |
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77 | y = 0; |
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78 | } |
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79 | else |
80 | // clip |
81 | h = vram_h - y; |
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82 | } |
83 | |
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84 | vram += y * 1024 + x; |
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85 | |
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86 | cbs->pl_vout_flip(vram, 1024, gpu.status.rgb24, w, h); |
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87 | } |
88 | |
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89 | void vout_blank(void) |
90 | { |
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91 | int w = gpu.screen.hres; |
92 | int h = gpu.screen.h; |
93 | if (gpu.state.enhancement_active) { |
94 | w *= 2; |
95 | h *= 2; |
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96 | } |
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97 | check_mode_change(0); |
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98 | cbs->pl_vout_flip(NULL, 1024, gpu.status.rgb24, w, h); |
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99 | } |
100 | |
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101 | long GPUopen(void **unused) |
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102 | { |
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103 | gpu.frameskip.active = 0; |
104 | gpu.frameskip.frame_ready = 1; |
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105 | |
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106 | cbs->pl_vout_open(); |
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107 | check_mode_change(1); |
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108 | vout_update(); |
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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 |