| 1 | /* |
| 2 | * video output handling using plugin_lib |
| 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 <string.h> |
| 13 | #include "gpu.h" |
| 14 | #include "../../frontend/plugin_lib.h" |
| 15 | |
| 16 | static const struct rearmed_cbs *cbs; |
| 17 | |
| 18 | int vout_init(void) |
| 19 | { |
| 20 | return 0; |
| 21 | } |
| 22 | |
| 23 | int vout_finish(void) |
| 24 | { |
| 25 | return 0; |
| 26 | } |
| 27 | |
| 28 | static void check_mode_change(int force) |
| 29 | { |
| 30 | static uint32_t old_status; |
| 31 | static int old_h; |
| 32 | int w = gpu.screen.hres; |
| 33 | int h = gpu.screen.h; |
| 34 | int w_out = w; |
| 35 | int h_out = h; |
| 36 | |
| 37 | gpu.state.enhancement_active = |
| 38 | gpu.get_enhancement_bufer != NULL && gpu.state.enhancement_enable |
| 39 | && w <= 512 && h <= 256 && !gpu.status.rgb24; |
| 40 | |
| 41 | if (gpu.state.enhancement_active) { |
| 42 | w_out *= 2; |
| 43 | h_out *= 2; |
| 44 | } |
| 45 | |
| 46 | gpu.state.downscale_active = |
| 47 | gpu.get_downscale_buffer != NULL && gpu.state.downscale_enable |
| 48 | && (w >= 512 || h >= 256); |
| 49 | |
| 50 | if (gpu.state.downscale_active) { |
| 51 | w_out = w < 512 ? w : 320; |
| 52 | h_out = h < 256 ? h : h / 2; |
| 53 | } |
| 54 | |
| 55 | // width|rgb24 change? |
| 56 | if (force || (gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || h != old_h) |
| 57 | { |
| 58 | old_status = gpu.status.reg; |
| 59 | old_h = h; |
| 60 | |
| 61 | cbs->pl_vout_set_mode(w_out, h_out, w, h, gpu.status.rgb24 ? 24 : 16); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | void vout_update(void) |
| 66 | { |
| 67 | int x = gpu.screen.x & ~1; // alignment needed by blitter |
| 68 | int y = gpu.screen.y; |
| 69 | int w = gpu.screen.w; |
| 70 | int h = gpu.screen.h; |
| 71 | uint16_t *vram = gpu.vram; |
| 72 | int vram_h = 512; |
| 73 | |
| 74 | if (w == 0 || h == 0) |
| 75 | return; |
| 76 | |
| 77 | check_mode_change(0); |
| 78 | if (gpu.state.enhancement_active) |
| 79 | vram = gpu.get_enhancement_bufer(&x, &y, &w, &h, &vram_h); |
| 80 | |
| 81 | if (gpu.state.downscale_active) |
| 82 | vram = gpu.get_downscale_buffer(&x, &y, &w, &h, &vram_h); |
| 83 | |
| 84 | if (y + h > vram_h) { |
| 85 | if (y + h - vram_h > h / 2) { |
| 86 | // wrap |
| 87 | h -= vram_h - y; |
| 88 | y = 0; |
| 89 | } |
| 90 | else |
| 91 | // clip |
| 92 | h = vram_h - y; |
| 93 | } |
| 94 | |
| 95 | vram += y * 1024 + x; |
| 96 | |
| 97 | cbs->pl_vout_flip(vram, 1024, gpu.status.rgb24, w, h); |
| 98 | } |
| 99 | |
| 100 | void vout_blank(void) |
| 101 | { |
| 102 | int w = gpu.screen.hres; |
| 103 | int h = gpu.screen.h; |
| 104 | |
| 105 | check_mode_change(0); |
| 106 | if (gpu.state.enhancement_active) { |
| 107 | w *= 2; |
| 108 | h *= 2; |
| 109 | } |
| 110 | cbs->pl_vout_flip(NULL, 1024, gpu.status.rgb24, w, h); |
| 111 | } |
| 112 | |
| 113 | long GPUopen(void **unused) |
| 114 | { |
| 115 | gpu.frameskip.active = 0; |
| 116 | gpu.frameskip.frame_ready = 1; |
| 117 | |
| 118 | cbs->pl_vout_open(); |
| 119 | check_mode_change(1); |
| 120 | vout_update(); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | long GPUclose(void) |
| 125 | { |
| 126 | cbs->pl_vout_close(); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | void vout_set_config(const struct rearmed_cbs *cbs_) |
| 131 | { |
| 132 | cbs = cbs_; |
| 133 | } |
| 134 | |
| 135 | // vim:shiftwidth=2:expandtab |