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 | int32_t lcd_verbose = 0;
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25 |
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26 | #define WIN_W (510 * 2)
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27 | #define WIN_H (64 * 2)
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28 |
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29 | #define GFX_BGR 0x00000000
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30 | #define GFX_FGR 0xFFFFFFFF
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31 |
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32 | #define TXT_BGR 0x000000FF
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33 | #define TXT_FGR ((SDL_Color){ .r = 255, .b = 255, .g = 255, .a = 255 })
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34 |
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35 | #define REG_ARG 0
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36 | #define REG_COM 1
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37 |
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38 | #define G_NONE 0x00
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39 | #define G_INIT 0x40
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40 | #define G_MWRITE 0x42
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41 | #define G_MREAD 0x43
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42 | #define G_SETSAD 0x44
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43 | #define G_CRSWR 0x46
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44 | #define G_CRSRD 0x47
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45 | #define G_CRSMRT 0x4C
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46 | #define G_CRSMLT 0x4D
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47 | #define G_CRSMUP 0x4E
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48 | #define G_CRSMDN 0x4F
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49 | #define G_ERASE 0x52
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50 | #define G_SLEEP 0x53
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51 | #define G_DSPOFF 0x58
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52 | #define G_DSPON 0x59
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53 | #define G_HSCRL 0x5A
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54 | #define G_OVRLAY 0x5B
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55 | #define G_CGRAM 0x5C
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56 | #define G_CRSFRM 0x5D
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57 |
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58 | #define TXT_W 85
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59 | #define TXT_H 8
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60 |
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61 | #define GFX_W 85
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62 | #define GFX_H 64
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63 | #define GFX_PIX 6
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64 |
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65 | #define BASE_TXT 0x0000
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66 | #define BASE_GFX 0x2000
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67 |
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68 | #define DIR_UP -85
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69 | #define DIR_DOWN 85
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70 | #define DIR_RIGHT 1
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71 |
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72 | static uint8_t mem_txt[TXT_H * TXT_W];
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73 | static uint8_t mem_gfx[GFX_H * GFX_W];
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74 |
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75 | static SDL_Window *win;
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76 | static SDL_Renderer *ren;
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77 | static SDL_atomic_t frame;
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78 | static SDL_atomic_t ena;
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79 |
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80 | static TTF_Font *fon;
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81 | static int32_t fon_w, fon_h;
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82 |
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83 | static int32_t txt_w, txt_h;
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84 | static SDL_Surface *txt;
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85 | static SDL_Texture *gfx;
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86 |
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87 | static int32_t com;
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88 | static int32_t n_arg;
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89 | static int32_t cur = BASE_TXT;
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90 | static int32_t dir = DIR_RIGHT;
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91 |
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92 | void lcd_sdl(void)
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93 | {
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94 | ver3("lcd_sdl()");
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95 |
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96 | static int32_t last = 0;
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97 | int32_t now = SDL_AtomicGet(&frame);
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98 |
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99 | if (last == now) {
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100 | ver3("no update");
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101 | return;
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102 | }
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103 |
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104 | last = now;
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105 |
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106 | if (SDL_FillRect(txt, NULL, TXT_BGR) < 0) {
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107 | fail("SDL_FillRect() failed: %s", SDL_GetError());
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108 | }
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109 |
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110 | if (SDL_AtomicGet(&ena) == 0) {
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111 | SDL_Texture *tex = SDL_CreateTextureFromSurface(ren, txt);
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112 |
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113 | if (tex == NULL) {
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114 | fail("SDL_CreateTextureFromSurface() failed: %s", SDL_GetError());
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115 | }
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116 |
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117 | if (SDL_RenderCopy(ren, tex, NULL, NULL) < 0) {
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118 | fail("SDL_RenderCopy() failed: %s", SDL_GetError());
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119 | }
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120 |
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121 | SDL_DestroyTexture(tex);
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122 | SDL_RenderPresent(ren);
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123 | return;
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124 | }
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125 |
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126 | for (int32_t y = 0; y < TXT_H; ++y) {
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127 | char line[TXT_W + 1];
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128 |
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129 | if (SDL_LockMutex(cpu_mutex) < 0) {
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130 | fail("SDL_LockMutex() failed: %s", SDL_GetError());
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131 | }
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132 |
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133 | memcpy(line, mem_txt + y * TXT_W, TXT_W);
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134 |
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135 | if (SDL_UnlockMutex(cpu_mutex) < 0) {
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136 | fail("SDL_UnlockMutex() failed: %s", SDL_GetError());
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137 | }
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138 |
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139 | for (int32_t x = 0; x < TXT_W; ++x) {
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140 | if (line[x] == 0x00) {
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141 | line[x] = ' ';
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142 | }
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143 | }
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144 |
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145 | line[TXT_W] = 0;
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146 |
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147 | SDL_Surface *lin = TTF_RenderText_Blended(fon, line, TXT_FGR);
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148 |
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149 | if (lin == NULL) {
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150 | fail("TTF_RenderText_Blended() failed: %s", TTF_GetError());
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151 | }
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152 |
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153 | if (SDL_BlitSurface(lin, NULL, txt, &(SDL_Rect){
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154 | .x = 0,
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155 | .y = y * fon_h,
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156 | .w = TXT_W * fon_w,
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157 | .h = fon_h
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158 | })) {
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159 | fail("SDL_BlitSurface() failed: %s", SDL_GetError());
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160 | }
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161 |
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162 | SDL_FreeSurface(lin);
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163 | }
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164 |
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165 | SDL_Texture *tex = SDL_CreateTextureFromSurface(ren, txt);
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166 |
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167 | if (tex == NULL) {
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168 | fail("SDL_CreateTextureFromSurface() failed: %s", SDL_GetError());
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169 | }
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170 |
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171 | if (SDL_RenderCopy(ren, tex, NULL, NULL) < 0) {
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172 | fail("SDL_RenderCopy() failed: %s", SDL_GetError());
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173 | }
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174 |
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175 | SDL_DestroyTexture(tex);
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176 |
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177 | void *buf;
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178 | int32_t pitch;
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179 |
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180 | if (SDL_LockTexture(gfx, NULL, &buf, &pitch) < 0) {
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181 | fail("SDL_LockTexture() failed: %s", SDL_GetError());
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182 | }
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183 |
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184 | uint32_t *pix = buf;
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185 |
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186 | for (int32_t y = 0; y < GFX_H; ++y) {
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187 | for (int32_t x = 0; x < GFX_W; ++x) {
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188 | uint8_t b = mem_gfx[y * GFX_W + x];
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189 |
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190 | for (int32_t p = 0; p < GFX_PIX; ++p) {
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191 | bool set = (b & (1 << (7 - p))) != 0;
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192 | *pix++ = set ? GFX_FGR : GFX_BGR;
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193 | }
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194 | }
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195 |
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196 | pix += pitch / 4 - GFX_W * GFX_PIX;
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197 | }
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198 |
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199 | SDL_UnlockTexture(gfx);
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200 |
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201 | if (SDL_RenderCopy(ren, gfx, NULL, NULL) < 0) {
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202 | fail("SDL_RenderCopy() failed: %s", SDL_GetError());
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203 | }
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204 |
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205 | SDL_RenderPresent(ren);
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206 | }
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207 |
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208 | void lcd_init(void)
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209 | {
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210 | ver("lcd init");
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211 |
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212 | win = SDL_CreateWindow("LCD", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
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213 | WIN_W, WIN_H, 0);
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214 |
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215 | if (win == NULL) {
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216 | fail("SDL_CreateWindow() failed: %s", SDL_GetError());
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217 | }
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218 |
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219 | ren = SDL_CreateRenderer(win, -1, 0);
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220 |
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221 | if (ren == NULL) {
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222 | fail("SDL_CreateRenderer() failed: %s", SDL_GetError());
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223 | }
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224 |
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225 | gfx = SDL_CreateTexture(ren, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING,
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226 | GFX_W * GFX_PIX, GFX_H);
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227 |
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228 | if (gfx == NULL) {
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229 | fail("SDL_CreateTexture() failed: %s", SDL_GetError());
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230 | }
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231 |
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232 | if (SDL_SetTextureBlendMode(gfx, SDL_BLENDMODE_BLEND) < 0) {
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233 | fail("SDL_SetTextureBlendMode() failed: %s", SDL_GetError());
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234 | }
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235 |
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236 | SDL_RWops *ops = SDL_RWFromFile(font, "rb");
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237 |
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238 | if (ops == NULL) {
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239 | fail("error while opening font file %s: %s", font, SDL_GetError());
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240 | }
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241 |
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242 | fon = TTF_OpenFontRW(ops, 1, 32);
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243 |
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244 | if (fon == NULL) {
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245 | fail("error while loading font file %s: %s", font, TTF_GetError());
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246 | }
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247 |
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248 | fon_h = TTF_FontLineSkip(fon);
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249 |
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250 | if (TTF_GlyphMetrics(fon, 'X', NULL, NULL, NULL, NULL, &fon_w) < 0) {
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251 | fail("error while measuring font width: %s", TTF_GetError());
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252 | }
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253 |
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254 | txt_w = TXT_W * fon_w;
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255 | txt_h = TXT_H * fon_h;
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256 |
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257 | txt = SDL_CreateRGBSurfaceWithFormat(0, txt_w, txt_h, 32, SDL_PIXELFORMAT_RGBA8888);
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258 |
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259 | if (txt == NULL) {
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260 | fail("SDL_CreateRGBSurface() failed: %s", SDL_GetError());
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261 | }
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262 |
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263 | for (int32_t i = 0; i < TXT_W * TXT_H; ++i) {
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264 | mem_txt[i] = ' ';
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265 | }
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266 | }
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267 |
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268 | void lcd_quit(void)
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269 | {
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270 | ver("lcd quit");
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271 |
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272 | SDL_FreeSurface(txt);
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273 | TTF_CloseFont(fon);
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274 |
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275 | SDL_DestroyTexture(gfx);
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276 |
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277 | SDL_DestroyRenderer(ren);
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278 | SDL_DestroyWindow(win);
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279 | }
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280 |
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281 | bool lcd_exec(void)
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282 | {
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283 | ver3("lcd exec");
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284 | return false;
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285 | }
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286 |
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287 | uint32_t lcd_read(uint32_t off, int32_t sz)
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288 | {
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289 | ver2("lcd rd %u:%d", off, sz * 8);
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290 |
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291 | if (sz != 1 || off != 1) {
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292 | fail("invalid lcd rd %u:%d", off, sz * 8);
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293 | }
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294 |
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295 | switch (com) {
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296 | case G_MREAD:
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297 | if (cur >= BASE_TXT && cur < BASE_TXT + TXT_W * TXT_H) {
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298 | return mem_txt[cur - BASE_TXT];
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299 | }
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300 |
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301 | if (cur >= BASE_GFX && cur < BASE_GFX + GFX_W * GFX_H) {
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302 | return mem_gfx[cur - BASE_GFX];
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303 | }
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304 |
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305 | return 0x00;
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306 |
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307 | default:
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308 | return 0x00;
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309 | }
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310 | }
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311 |
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312 | static void proc_arg(int32_t val)
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313 | {
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314 | switch (com) {
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315 | case G_MWRITE:
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316 | if (cur >= BASE_TXT && cur < BASE_TXT + TXT_W * TXT_H) {
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317 | mem_txt[cur - BASE_TXT] = (uint8_t)val;
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318 | }
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319 | else if (cur >= BASE_GFX && cur < BASE_GFX + GFX_W * GFX_H) {
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320 | mem_gfx[cur - BASE_GFX] = (uint8_t)val;
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321 | }
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322 |
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323 | cur += dir;
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324 | SDL_AtomicAdd(&frame, 1);
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325 | break;
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326 |
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327 | case G_CRSWR:
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328 | if (n_arg == 0) {
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329 | cur = val;
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330 | }
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331 | else if (n_arg == 1) {
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332 | cur |= val << 8;
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333 |
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334 | if (cur < BASE_TXT ||
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335 | (cur >= BASE_TXT + TXT_W * TXT_H && cur < BASE_GFX) ||
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336 | cur >= BASE_GFX + GFX_W * GFX_H) {
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337 | fail("invalid address 0x%04x", cur);
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338 | }
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339 | }
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340 |
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341 | break;
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342 |
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343 | default:
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344 | break;
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345 | }
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346 | }
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347 |
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348 | static void proc_com(int32_t val)
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349 | {
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350 | switch (val) {
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351 | case G_CRSWR:
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352 | case G_MREAD:
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353 | case G_MWRITE:
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354 | com = val;
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355 | break;
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356 |
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357 | case G_CRSMRT:
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358 | dir = DIR_RIGHT;
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359 | com = G_NONE;
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360 | break;
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361 |
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362 | case G_CRSMUP:
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363 | dir = DIR_UP;
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364 | com = G_NONE;
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365 | break;
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366 |
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367 | case G_CRSMDN:
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368 | dir = DIR_DOWN;
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369 | com = G_NONE;
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370 | break;
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371 |
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372 | case G_DSPOFF:
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373 | SDL_AtomicSet(&ena, 0);
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374 | com = G_NONE;
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375 | break;
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376 |
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377 | case G_DSPON:
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378 | SDL_AtomicSet(&ena, 1);
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379 | com = G_NONE;
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380 | break;
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381 |
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382 | default:
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383 | com = G_NONE;
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384 | break;
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385 | }
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386 | }
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387 |
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388 | void lcd_write(uint32_t off, int32_t sz, uint32_t val)
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389 | {
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390 | ver2("lcd wr %u:%d 0x%0*x", off, sz * 8, sz * 2, val);
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391 |
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392 | if (sz != 1 || off > 1) {
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393 | fail("invalid lcd wr %u:%d", off, sz * 8);
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394 | }
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395 |
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396 | switch (off) {
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397 | case REG_ARG:
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398 | proc_arg((int32_t)val);
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399 | ++n_arg;
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400 | break;
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401 |
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402 | case REG_COM:
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403 | proc_com((int32_t)val);
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404 | n_arg = 0;
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405 | break;
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406 |
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407 | default:
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408 | break;
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409 | }
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410 | }
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