1 | /*
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2 | * Copyright (C) 2017 The Contributors
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3 | *
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4 | * This program is free software: you can redistribute it and/or modify
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5 | * it under the terms of the GNU General Public License as published by
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6 | * the Free Software Foundation, either version 3 of the License, or (at
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7 | * your option) any later version.
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8 | *
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9 | * This program is distributed in the hope that it will be useful, but
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10 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 | * General Public License for more details.
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13 | *
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14 | * A copy of the GNU General Public License can be found in the file
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15 | * "gpl.txt" in the top directory of this repository.
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16 | */
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17 |
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18 | #include <all.h>
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19 |
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20 | #define ver(...) _ver(lcd_verbose, 0, __VA_ARGS__)
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21 | #define ver2(...) _ver(lcd_verbose, 1, __VA_ARGS__)
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22 | #define ver3(...) _ver(lcd_verbose, 2, __VA_ARGS__)
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23 |
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24 | #define WIN_W (510 * 2)
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25 | #define WIN_H (64 * 2)
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26 |
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27 | #define CON_BGR 0x00000000
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28 | #define CON_DRW 0xFFFFFFFF
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29 | #define CON_FGR ((SDL_Color){ .r = 255, .b = 255, .g = 255, .a = 255 })
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30 |
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31 | #define G_INIT 0x40
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32 | #define G_MWRITE 0x42
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33 | #define G_MREAD 0x43
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34 | #define G_SETSAD 0x44
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35 | #define G_CRSWR 0x46
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36 | #define G_CRSRD 0x47
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37 | #define G_CRSMRT 0x4C
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38 | #define G_CRSMLT 0x4D
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39 | #define G_CRSMUP 0x4E
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40 | #define G_CRSMDN 0x4F
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41 | #define G_ERASE 0x52
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42 | #define G_SLEEP 0x53
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43 | #define G_DSPOFF 0x58
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44 | #define G_DSPON 0x59
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45 | #define G_HSCRL 0x5A
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46 | #define G_OVRLAY 0x5B
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47 | #define G_CGRAM 0x5C
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48 | #define G_CRSFRM 0x5D
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49 |
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50 | #define TXT_W 85
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51 | #define TXT_H 8
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52 |
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53 | #define GFX_W 85
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54 | #define GFX_H 64
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55 |
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56 | #define BASE_TXT 0x0000
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57 | #define BASE_GFX 0x2000
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58 |
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59 | static uint8_t mem_txt[TXT_H * TXT_W];
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60 | static uint8_t mem_gfx[GFX_H * GFX_W];
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61 |
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62 | static SDL_Window *win;
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63 | static SDL_Renderer *ren;
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64 | static SDL_atomic_t frame;
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65 | static SDL_atomic_t clear;
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66 |
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67 | static uint32_t render = 0;
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68 |
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69 | static TTF_Font *fon;
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70 | static int32_t fon_w, fon_h;
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71 |
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72 | static int32_t sur_w, sur_h;
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73 | static SDL_Surface *sur;
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74 |
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75 | static SDL_Surface *gfx_sur;
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76 |
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77 | static int32_t cur = 0;
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78 | static int32_t cur_c = 0;
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79 | static int32_t dir = 1;
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80 |
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81 | static int32_t current_op = 0x00;
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82 |
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83 | static uint32_t last_val = 0x00;
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84 | static uint32_t last_off = 0;
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85 | static int32_t last_sz = -1;
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86 | static int32_t mult_val_c = 0;
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87 |
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88 | int32_t lcd_verbose = 0;
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89 |
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90 |
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91 | void lcd_sdl(void)
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92 | {
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93 | ver3("lcd_sdl()");
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94 |
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95 | if (SDL_AtomicGet(&clear)) {
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96 | if (SDL_SetRenderDrawColor(ren, 0x00, 0x00, 0x00, 0xff) < 0) {
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97 | fail("SDL_SetRenderDrawColor() failed: %s", SDL_GetError());
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98 | }
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99 |
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100 | if (SDL_RenderClear(ren) < 0) {
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101 | fail("SDL_RenderClear() failed: %s", SDL_GetError());
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102 | }
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103 |
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104 | SDL_RenderPresent(ren);
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105 | SDL_AtomicSet(&clear, 0);
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106 | return;
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107 | }
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108 |
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109 | static int32_t last = 0;
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110 | int32_t now = SDL_AtomicGet(&frame);
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111 |
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112 | if (last == now) {
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113 | ver3("no update");
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114 | return;
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115 | }
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116 |
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117 | last = now;
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118 |
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119 | if (SDL_FillRect(sur, NULL, CON_BGR) < 0) {
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120 | fail("SDL_FillRect() failed: %s", SDL_GetError());
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121 | }
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122 |
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123 | for (int32_t y = 0; y < TXT_H; ++y) {
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124 | char line[TXT_W + 1];
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125 |
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126 | if (SDL_LockMutex(cpu_mutex) < 0) {
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127 | fail("SDL_LockMutex() failed: %s", SDL_GetError());
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128 | }
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129 |
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130 | memcpy(line, mem_txt + y * TXT_W, TXT_W);
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131 | line[TXT_W] = 0;
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132 |
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133 | if (SDL_UnlockMutex(cpu_mutex) < 0) {
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134 | fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
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135 | }
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136 |
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137 | SDL_Surface *lin = TTF_RenderText_Blended(fon, line, CON_FGR);
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138 |
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139 | if (lin == NULL) {
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140 | fail("TTF_RenderText_Blended() failed: %s", TTF_GetError());
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141 | }
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142 |
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143 | if (SDL_BlitSurface(lin, NULL, sur, &(SDL_Rect){
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144 | .x = 0,
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145 | .y = y * fon_h,
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146 | .w = TXT_W * fon_w,
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147 | .h = fon_h
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148 | })) {
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149 | fail("SDL_BlitSurface() failed: %s", SDL_GetError());
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150 | }
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151 |
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152 | SDL_FreeSurface(lin);
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153 | }
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154 |
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155 | SDL_Texture *tex = SDL_CreateTextureFromSurface(ren, sur);
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156 |
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157 | if (tex == NULL) {
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158 | fail("SDL_CreateTextureFromSurface() failed: %s", SDL_GetError());
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159 | }
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160 |
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161 | if (SDL_RenderCopy(ren, tex, NULL, NULL) < 0) {
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162 | fail("SDL_RenderCopy() failed: %s", SDL_GetError());
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163 | }
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164 |
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165 | for (int32_t y = 0; y < GFX_H * GFX_W; ++y) {
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166 | for (int32_t p = 7; p > 1; --p) {
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167 | uint32_t col = CON_BGR;
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168 | if ((mem_gfx[y] & (1 << p)) > 0) {
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169 | col = CON_DRW;
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170 | }
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171 |
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172 | if (SDL_FillRect(gfx_sur, &(SDL_Rect){
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173 | .x = y % 85 * fon_w + (8 - p) * fon_w / 6,
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174 | .y = y / 85 * fon_h / 8,
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175 | .w = fon_w / 6 + 1,
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176 | .h = fon_h / 8 + 1
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177 | }, col) < 0) {
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178 | fail("SDL_FillRect() failed: %s", SDL_GetError());
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179 | }
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180 | }
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181 | }
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182 |
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183 | SDL_Texture *gfx_tex = SDL_CreateTextureFromSurface(ren, gfx_sur);
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184 |
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185 | if (gfx_tex == NULL) {
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186 | fail("SDL_CreateTextureFromSurface() failed: %s", SDL_GetError());
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187 | }
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188 |
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189 | if (SDL_SetTextureBlendMode(gfx_tex, SDL_BLENDMODE_ADD) < 0) {
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190 | fail("SDL_SetTextureBlendMode() failed: %s", SDL_GetError());
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191 | }
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192 |
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193 | if (SDL_RenderCopy(ren, gfx_tex, NULL, NULL) < 0) {
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194 | fail("SDL_RenderCopy() failed: %s", SDL_GetError());
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195 | }
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196 |
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197 | SDL_DestroyTexture(tex);
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198 | SDL_DestroyTexture(gfx_tex);
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199 | SDL_RenderPresent(ren);
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200 | }
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201 |
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202 |
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203 | void lcd_init(void)
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204 | {
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205 | ver("lcd init");
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206 |
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207 | win = SDL_CreateWindow("Front LCD", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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208 | WIN_W, WIN_H, 0);
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209 |
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210 | if (win == NULL) {
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211 | fail("SDL_CreateWindow() failed: %s", SDL_GetError());
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212 | }
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213 |
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214 | ren = SDL_CreateRenderer(win, -1, 0);
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215 |
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216 | if (ren == NULL) {
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217 | fail("SDL_CreateRenderer() failed: %s", SDL_GetError());
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218 | }
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219 |
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220 | SDL_AtomicSet(&clear, 0);
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221 |
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222 | SDL_AtomicSet(&frame, 1);
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223 |
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224 | SDL_RWops *ops = SDL_RWFromFile(font, "rb");
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225 |
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226 | if (ops == NULL) {
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227 | fail("error while opening font file %s: %s", font, SDL_GetError());
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228 | }
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229 |
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230 | fon = TTF_OpenFontRW(ops, 1, 32);
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231 |
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232 | if (fon == NULL) {
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233 | fail("error while loading font file %s: %s", font, TTF_GetError());
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234 | }
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235 |
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236 | fon_h = TTF_FontLineSkip(fon);
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237 |
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238 | if (TTF_GlyphMetrics(fon, 'X', NULL, NULL, NULL, NULL, &fon_w) < 0) {
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239 | fail("error while measuring font width: %s", TTF_GetError());
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240 | }
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241 |
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242 | sur_w = TXT_W * fon_w;
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243 | sur_h = TXT_H * fon_h;
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244 |
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245 | sur = SDL_CreateRGBSurface(0, sur_w, sur_h, 32, 0, 0, 0, 0);
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246 |
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247 | if (sur == NULL) {
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248 | fail("SDL_CreateRGBSurface() failed: %s", SDL_GetError());
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249 | }
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250 |
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251 | gfx_sur = SDL_CreateRGBSurface(0, sur_w, sur_h, 32, 0, 0, 0, 0);
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252 |
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253 | if (gfx_sur == NULL) {
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254 | fail("SDL_CreateRGBSurface() failed: %s", SDL_GetError());
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255 | }
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256 |
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257 | for (int32_t y = 0; y < TXT_W * TXT_H; ++y) {
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258 | mem_txt[y] = ' ';
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259 | }
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260 | }
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261 |
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262 | void lcd_quit(void)
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263 | {
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264 | ver("lcd quit");
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265 |
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266 | SDL_FreeSurface(sur);
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267 | SDL_FreeSurface(gfx_sur);
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268 | TTF_CloseFont(fon);
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269 |
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270 | SDL_DestroyRenderer(ren);
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271 | SDL_DestroyWindow(win);
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272 | }
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273 |
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274 | bool lcd_exec(void)
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275 | {
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276 | ver3("lcd exec");
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277 | return false;
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278 | }
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279 |
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280 | uint32_t lcd_read(uint32_t off, int32_t sz)
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281 | {
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282 | ver2("lcd rd %u:%d", off, sz * 8);
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283 |
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284 | uint32_t rv;
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285 |
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286 | switch (current_op) {
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287 | case G_MREAD:
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288 | if (cur >= BASE_TXT && cur < BASE_TXT + TXT_W * TXT_H) {
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289 | rv = mem_txt[cur - BASE_TXT];
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290 | }
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291 | else if (cur >= BASE_GFX && cur < BASE_TXT + GFX_W * GFX_H) {
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292 | rv = mem_gfx[cur - BASE_GFX];
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293 | }
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294 | else {
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295 | rv = 0x00;
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296 | }
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297 | break;
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298 |
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299 | default:
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300 | rv = 0x00;
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301 | break;
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302 | }
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303 | return rv;
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304 | }
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305 |
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306 | void lcd_write(uint32_t off, int32_t sz, uint32_t val)
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307 | {
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308 | if (last_val != val && mult_val_c > 0) {
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309 | if (mult_val_c > 1) {
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310 | ver2("lcd wr %u:%d 0x%0*x was called %u more times", last_off, last_sz * 8, last_sz * 2, last_val, mult_val_c);
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311 | }
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312 | else {
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313 | ver2("lcd wr %u:%d 0x%0*x", last_off, last_sz * 8, last_sz * 2, last_val);
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314 | }
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315 |
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316 | ver2("lcd wr %u:%d 0x%0*x", off, sz * 8, sz * 2, val);
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317 | mult_val_c = 0;
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318 | }
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319 | else if (last_val == val && mult_val_c >= 0) {
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320 | ++mult_val_c;
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321 | }
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322 | else {
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323 | ver2("lcd wr %u:%d 0x%0*x", off, sz * 8, sz * 2, val);
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324 | }
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325 |
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326 | last_val = val;
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327 | last_off = off;
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328 | last_sz = sz;
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329 |
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330 | if (off == 0) {
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331 | switch (current_op) {
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332 | case G_MWRITE:
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333 | if (cur >= BASE_TXT && cur < BASE_TXT + TXT_W * TXT_H) {
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334 | if (val == 0) {
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335 | mem_txt[cur - BASE_TXT] = ' ';
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336 | }
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337 | else {
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338 | mem_txt[cur - BASE_TXT] = (uint8_t) val;
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339 | }
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340 |
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341 | cur += dir;
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342 |
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343 | if (render) {
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344 | SDL_AtomicAdd(&frame, 1);
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345 | }
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346 | }
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347 | else if (cur >= BASE_GFX && cur < BASE_GFX + GFX_W * GFX_H) {
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348 | mem_gfx[cur - BASE_GFX] = (uint8_t) val;
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349 | cur += dir;
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350 |
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351 | if (render) {
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352 | SDL_AtomicAdd(&frame, 1);
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353 | }
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354 | }
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355 | else {
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356 | err("Invalid cur value %d", cur);
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357 | }
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358 | break;
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359 |
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360 | case G_CRSWR:
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361 | if (cur_c == 0) {
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362 | cur = (int32_t) val;
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363 | cur_c++;
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364 | }
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365 | else if (cur_c == 1) {
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366 | cur = cur | ((int32_t) val << 8);
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367 | cur_c = 0;
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368 | }
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369 | break;
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370 |
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371 | default:
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372 | break;
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373 | }
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374 | }
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375 | else {
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376 | switch (val) {
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377 | case G_MWRITE:
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378 | current_op = G_MWRITE;
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379 | break;
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380 |
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381 | case G_CRSMRT:
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382 | dir = 1;
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383 | current_op = G_CRSMRT;
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384 | break;
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385 |
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386 | case G_CRSMUP:
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387 | dir = -85;
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388 | current_op = G_CRSMUP;
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389 | break;
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390 |
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391 | case G_CRSMDN:
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392 | dir = 85;
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393 | current_op = G_CRSMDN;
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394 | break;
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395 |
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396 | case G_CRSWR:
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397 | current_op = G_CRSWR;
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398 | break;
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399 |
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400 | case G_MREAD:
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401 | current_op = G_MREAD;
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402 | break;
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403 |
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404 | case G_DSPOFF:
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405 | SDL_AtomicSet(&clear, 1);
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406 | render = 0;
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407 | current_op = G_DSPOFF;
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408 | break;
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409 |
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410 | case G_DSPON:
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411 | render = 1;
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412 | current_op = G_DSPON;
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413 | break;
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414 |
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415 | default:
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416 | current_op = 0x00;
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417 | break;
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418 | }
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419 | }
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420 | }
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