Mercurial > hg > dmlib
annotate dmtext_bm.c @ 160:67d2cba58a87
Add fontconv tool.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Sat, 06 Oct 2012 07:29:26 +0300 |
parents | b5569c84f00a |
children | 0df62d4a1d1b |
rev | line source |
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1 /* |
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2 * DMLib |
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3 * -- Bitmap and TTF text & font support |
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4 * Programmed and designed by Matti 'ccr' Hamalainen |
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5 * (C) Copyright 2012 Tecnic Software productions (TNSP) |
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6 */ |
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7 #include "dmtext.h" |
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8 #include "dmresw.h" |
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9 |
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10 |
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11 void dmDrawBMTextConst(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt) |
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12 { |
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13 const char *ptr = fmt; |
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14 DMUnscaledBlitFunc blit = NULL; |
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15 |
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16 while (*ptr) |
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17 { |
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18 int ch = *ptr++; |
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19 SDL_Surface *glyph; |
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20 |
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21 if (ch >= 0 && ch < font->nglyphs && (glyph = font->glyphs[ch]) != NULL) |
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22 { |
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23 if (blit == NULL) |
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24 blit = dmGetUnscaledBlitFunc(glyph->format, screen->format, mode); |
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25 |
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26 blit(glyph, xc, yc, screen); |
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27 xc += glyph->w; |
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28 } |
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29 else |
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30 xc += font->width; |
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31 } |
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32 } |
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33 |
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34 |
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35 void dmDrawBMTextVA(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt, va_list ap) |
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36 { |
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37 char *tmp = dm_strdup_vprintf(fmt, ap); |
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38 if (tmp != NULL) |
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39 { |
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40 dmDrawBMTextConst(screen, font, mode, xc, yc, tmp); |
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41 dmFree(tmp); |
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42 } |
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43 } |
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44 |
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45 |
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46 void dmDrawBMText(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt, ...) |
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47 { |
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48 va_list ap; |
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49 |
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50 va_start(ap, fmt); |
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51 dmDrawBMTextVA(screen, font, mode, xc, yc, fmt, ap); |
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52 va_end(ap); |
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53 } |
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54 |
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55 |
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56 DMBitmapFont *dmNewBitmapFont(int nglyphs, int width, int height) |
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57 { |
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58 DMBitmapFont *font = dmMalloc0(sizeof(DMBitmapFont)); |
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59 if (font == NULL) |
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60 return NULL; |
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61 |
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62 font->width = width; |
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63 font->height = height; |
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64 font->nglyphs = nglyphs; |
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65 font->glyphs = dmCalloc(nglyphs, sizeof(SDL_Surface *)); |
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66 if (font->glyphs == NULL) |
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67 { |
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68 dmFree(font); |
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69 return NULL; |
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70 } |
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71 |
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72 return font; |
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73 } |
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74 |
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75 |
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76 int dmFreeBitmapFont(DMBitmapFont *font) |
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77 { |
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78 int i; |
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79 |
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80 if (font == NULL) |
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81 return DMERR_NULLPTR; |
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82 |
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83 for (i = 0; i < font->nglyphs; i++) |
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84 { |
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85 if (font->glyphs[i] != NULL) |
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86 { |
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87 SDL_FreeSurface(font->glyphs[i]); |
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88 font->glyphs[i] = NULL; |
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89 } |
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90 } |
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91 |
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92 dmFree(font); |
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93 return DMERR_OK; |
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94 } |
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95 |
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96 |
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97 /* Set the palette for each glyph. While the function allows you to |
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98 * specify 'start' and 'end' indices and palette array freely, you should |
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99 * typically use DMFONT_NPALETTE size palette starting at index 0. |
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100 */ |
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101 int dmSetBitmapFontPalette(DMBitmapFont *font, SDL_Color *pal, int start, int size) |
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102 { |
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103 int i; |
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104 |
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105 if (font == NULL) |
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106 return DMERR_NULLPTR; |
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107 |
102 | 108 if (start < 0 || size < 1) |
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109 return DMERR_INVALID_ARGS; |
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110 |
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111 for (i = 0; i < font->nglyphs; i++) |
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112 { |
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113 SDL_Surface *glyph = font->glyphs[i]; |
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114 if (glyph != NULL) |
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115 { |
101 | 116 SDL_SetColors(glyph, pal, start, size); |
100
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117 } |
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118 } |
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119 |
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120 return DMERR_OK; |
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121 } |
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122 |
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123 |
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124 int dmLoadBitmapFont(DMResource *res, DMBitmapFont **pfont) |
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125 { |
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126 DMBitmapFont *font; |
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127 char magic[8]; |
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128 Uint16 version, nglyphs, maxglyph; |
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129 int width, height; |
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130 BOOL tsfont = FALSE; |
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131 |
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132 // Check magic and version |
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133 dmf_read_str(res, (Uint8 *) &magic, 6); |
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134 dmf_read_le16(res, &version); |
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135 |
89
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136 // Check if it is a legacy TSFONT file |
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137 if (memcmp(magic, TSFONT_MAGIC, 6) == 0) |
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138 { |
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139 // Yep, we handle these a bit differently |
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140 int encoding = dmfgetc(res); |
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141 tsfont = TRUE; |
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142 |
89
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143 if (version > TSFONT_VERSION) |
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144 return DMERR_VERSION; |
132
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145 |
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146 #ifdef FN_DEBUG |
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147 fprintf(stderr, "TSFONT v%d.%d (0x%04x), encoding=%d\n", version >> 8, version & 0xff, version, encoding); |
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148 #endif |
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149 |
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150 // There were only two encodings, 0 = none and 1 = RLE |
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151 // of which RLE was never actually used ... derp. |
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152 if (encoding != 0) |
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153 return DMERR_NOT_SUPPORTED; |
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154 } |
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155 else |
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156 { |
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157 if (memcmp(magic, DMFONT_MAGIC, 6) != 0) |
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158 return DMERR_INVALID; |
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159 |
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|
160 if (version > DMFONT_VERSION) |
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161 return DMERR_VERSION; |
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162 } |
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163 |
91
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164 // Read other header data |
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165 if (tsfont) |
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166 { |
91
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167 // TSFONT only has number of glyphs stored in the file |
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168 nglyphs = dmfgetc(res); |
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169 |
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170 // Maximum glyph number |
104
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171 maxglyph = 256; |
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172 } |
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173 else |
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174 { |
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175 dmf_read_le16(res, &nglyphs); |
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176 dmf_read_le16(res, &maxglyph); |
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177 } |
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178 |
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179 width = dmfgetc(res); |
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180 height = dmfgetc(res); |
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181 |
132
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182 #ifdef FN_DEBUG |
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183 fprintf(stderr, "nglyphs=%d (0x%02x), width=%d, height=%d\n", nglyphs, nglyphs, width, height); |
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184 #endif |
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185 |
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186 if (tsfont) |
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187 { |
91
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188 // TSFONT color assignments (boolean) .. we discard this. |
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189 dmfgetc(res); |
132
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190 |
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191 // Very old TSFONTs have some extra data that is not used |
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192 // .. can't actually even remember what it was for. |
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193 if (version == 0x0200) |
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194 { |
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195 int i; |
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196 for (i = 0; i < 32; i++) |
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197 dmfgetc(res); |
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198 } |
89
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199 } |
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200 |
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201 if (width < DMFONT_MIN_WIDTH || |
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202 height < DMFONT_MIN_HEIGHT || |
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203 width > DMFONT_MAX_WIDTH || |
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204 height > DMFONT_MAX_HEIGHT || |
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205 nglyphs > DMFONT_MAX_GLYPHS || |
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206 maxglyph > DMFONT_MAX_GLYPHS || |
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207 maxglyph < 1) |
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208 return DMERR_INVALID_DATA; |
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209 |
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210 // Allocate font |
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211 if ((*pfont = font = dmNewBitmapFont(maxglyph, width, height)) == NULL) |
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212 return DMERR_MALLOC; |
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213 |
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214 // Read glyph data, if any |
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215 if (nglyphs > 0) |
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216 { |
91
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217 int n, i; |
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218 Uint32 BitsPerPixel, Rmask, Gmask, Bmask, Amask; |
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219 SDL_Color pal[DMFONT_NPALETTE]; |
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220 |
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221 // Setup palette for 8bpp fonts |
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222 for (n = 0; n < DMFONT_NPALETTE; n++) |
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223 { |
104
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224 pal[n].r = pal[n].g = pal[n].b = 0; |
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225 pal[n].unused = n > 0 ? 255 : 0; |
91
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226 } |
75
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227 |
89
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228 if (tsfont) |
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229 { |
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230 BitsPerPixel = 8; |
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231 Rmask = Gmask = Bmask = Amask = 0; |
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232 } |
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233 else |
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234 { |
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235 BitsPerPixel = dmfgetc(res); |
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236 dmf_read_le32(res, &Rmask); |
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|
237 dmf_read_le32(res, &Gmask); |
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|
238 dmf_read_le32(res, &Bmask); |
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|
239 dmf_read_le32(res, &Amask); |
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240 } |
75
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241 |
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242 for (i = 0; i < nglyphs; i++) |
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243 { |
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244 int y; |
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245 Uint16 index; |
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246 Uint8 *pixels; |
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247 SDL_Surface *glyph; |
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248 |
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249 // TSFONT format has only byte sized index |
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250 if (tsfont) |
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251 index = dmfgetc(res); |
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252 else |
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253 dmf_read_le16(res, &index); |
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254 |
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255 // Read dimensions |
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256 width = dmfgetc(res); |
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257 height = dmfgetc(res); |
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258 |
132
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259 #ifdef FN_DEBUG |
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260 fprintf(stderr, "#%d @ %d - w=%d, h=%d\n", i, index, width, height); |
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261 #endif |
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262 |
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263 if (width < DMFONT_MIN_WIDTH || |
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264 height < DMFONT_MIN_HEIGHT || |
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265 width > DMFONT_MAX_WIDTH || |
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266 height > DMFONT_MAX_HEIGHT || |
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267 index >= maxglyph) |
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268 return DMERR_INVALID_DATA; |
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269 |
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270 // Allocate bitmap |
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271 font->glyphs[index] = glyph = SDL_CreateRGBSurface( |
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272 SDL_SWSURFACE, width, height, |
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273 BitsPerPixel, Rmask, Gmask, |
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274 Bmask, |
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275 Amask); |
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276 |
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277 if (glyph == NULL) |
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278 return DMERR_MALLOC; |
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279 |
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280 if (BitsPerPixel == 8) |
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281 SDL_SetColors(glyph, pal, 0, DMFONT_NPALETTE); |
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282 |
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283 // Read pixel data |
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284 pixels = glyph->pixels; |
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285 for (y = 0; y < glyph->h; y++) |
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286 { |
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287 if (dmfread(pixels, glyph->format->BytesPerPixel, glyph->w, res) != (size_t) glyph->w) |
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288 return DMERR_FREAD; |
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289 pixels += glyph->pitch; |
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290 } |
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291 } |
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292 } |
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293 |
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294 return DMERR_OK; |
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295 } |
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296 |
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297 |
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298 int dmSaveBitmapFont(DMResource *res, DMBitmapFont *font) |
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299 { |
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300 int maxglyph, nglyphs, n; |
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301 if (font == NULL) |
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302 return DMERR_NULLPTR; |
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303 |
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304 if (font->nglyphs > DMFONT_MAX_GLYPHS || |
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305 font->width > DMFONT_MAX_WIDTH || |
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306 font->height > DMFONT_MAX_HEIGHT || |
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307 font->width < DMFONT_MIN_WIDTH || |
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308 font->height < DMFONT_MIN_HEIGHT) |
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309 return DMERR_INVALID_DATA; |
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310 |
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311 // Count number of actually existing glyphs |
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312 for (maxglyph = nglyphs = n = 0; n < font->nglyphs; n++) |
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313 { |
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314 if (font->glyphs[n] != NULL) |
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315 { |
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316 nglyphs++; |
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317 maxglyph = n; |
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318 } |
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319 } |
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320 |
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321 // Write the DMFONT header |
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322 if (!dmf_write_str(res, (Uint8 *) DMFONT_MAGIC, 6)) |
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323 return DMERR_FWRITE; |
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324 |
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325 dmf_write_le16(res, DMFONT_VERSION); |
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326 dmf_write_le16(res, nglyphs); |
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327 dmf_write_le16(res, maxglyph); |
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328 dmfputc(font->width, res); |
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329 dmfputc(font->height, res); |
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330 |
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331 if (nglyphs > 0) |
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332 { |
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333 int i; |
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334 SDL_Surface *glyph = font->glyphs[maxglyph]; |
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335 |
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336 // If there are actual glyphs stored, save thi |
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337 dmfputc(glyph->format->BitsPerPixel, res); |
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338 dmf_write_le32(res, glyph->format->Rmask); |
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339 dmf_write_le32(res, glyph->format->Gmask); |
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340 dmf_write_le32(res, glyph->format->Bmask); |
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341 dmf_write_le32(res, glyph->format->Amask); |
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342 |
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343 for (i = 0; i < font->nglyphs; i++) |
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344 { |
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345 glyph = font->glyphs[i]; |
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346 if (glyph != NULL) |
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347 { |
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348 int y; |
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349 Uint8 *pixels = glyph->pixels; |
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350 |
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351 if (glyph->w < DMFONT_MIN_WIDTH || |
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352 glyph->h < DMFONT_MIN_HEIGHT || |
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353 glyph->w > DMFONT_MAX_WIDTH || |
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354 glyph->h > DMFONT_MAX_HEIGHT) |
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355 return DMERR_INVALID_DATA; |
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356 |
89
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357 // Each glyph has its table index and w/h stored |
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358 dmf_write_le16(res, i); |
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359 dmf_write_le16(res, glyph->w); |
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360 dmf_write_le16(res, glyph->h); |
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361 |
89
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362 // Write the pixel data |
b10884934aca
Various improvements in bitmapped font support, and addition of legacy
Matti Hamalainen <ccr@tnsp.org>
parents:
76
diff
changeset
|
363 for (y = 0; y < glyph->h; y++) |
b10884934aca
Various improvements in bitmapped font support, and addition of legacy
Matti Hamalainen <ccr@tnsp.org>
parents:
76
diff
changeset
|
364 { |
b10884934aca
Various improvements in bitmapped font support, and addition of legacy
Matti Hamalainen <ccr@tnsp.org>
parents:
76
diff
changeset
|
365 if (dmfwrite(pixels, glyph->format->BytesPerPixel, glyph->w, res) != (size_t) glyph->w) |
b10884934aca
Various improvements in bitmapped font support, and addition of legacy
Matti Hamalainen <ccr@tnsp.org>
parents:
76
diff
changeset
|
366 return DMERR_FWRITE; |
b10884934aca
Various improvements in bitmapped font support, and addition of legacy
Matti Hamalainen <ccr@tnsp.org>
parents:
76
diff
changeset
|
367 pixels += glyph->pitch; |
b10884934aca
Various improvements in bitmapped font support, and addition of legacy
Matti Hamalainen <ccr@tnsp.org>
parents:
76
diff
changeset
|
368 } |
75
e6535609c161
Initial implementation of loading and saving of bitmap fonts.
Matti Hamalainen <ccr@tnsp.org>
parents:
73
diff
changeset
|
369 } |
e6535609c161
Initial implementation of loading and saving of bitmap fonts.
Matti Hamalainen <ccr@tnsp.org>
parents:
73
diff
changeset
|
370 } |
73
295d08376744
Add function for saving a bitmap font.
Matti Hamalainen <ccr@tnsp.org>
parents:
70
diff
changeset
|
371 } |
75
e6535609c161
Initial implementation of loading and saving of bitmap fonts.
Matti Hamalainen <ccr@tnsp.org>
parents:
73
diff
changeset
|
372 |
73
295d08376744
Add function for saving a bitmap font.
Matti Hamalainen <ccr@tnsp.org>
parents:
70
diff
changeset
|
373 return DMERR_OK; |
295d08376744
Add function for saving a bitmap font.
Matti Hamalainen <ccr@tnsp.org>
parents:
70
diff
changeset
|
374 } |