Mercurial > hg > dmlib
annotate dmtext_bm.c @ 89:b10884934aca
Various improvements in bitmapped font support, and addition of legacy
TSFONT loading support (untested as of now).
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Tue, 02 Oct 2012 15:52:44 +0300 |
parents | 7d201aed1fd9 |
children | e1e308167991 |
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 DMScaledBlitFunc blit = dmGetScaledBlitFunc(font->glyphs[0]->format, screen->format, mode); |
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15 |
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16 while (*ptr) |
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17 { |
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18 SDL_Surface *glyph; |
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19 int pos; |
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20 int ch = *ptr++; |
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21 |
76 | 22 if (ch == '_') |
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23 { |
76 | 24 xc += 4; |
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25 continue; |
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26 } |
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27 else |
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28 if (ch >= 'A' && ch <= 'Z') |
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29 pos = ch - 'A' + 256 + 1; |
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30 else |
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31 if (ch >= 'a' && ch <= 'z') |
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32 pos = ch - 'a' + 1; |
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33 else |
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34 if (ch >= '0' && ch <= '9') |
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35 pos = ch - '0' + 48; |
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36 else |
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37 pos = ch; |
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38 |
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39 if (pos >= 0 && pos < font->nglyphs) |
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40 { |
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41 glyph = font->glyphs[pos]; |
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42 blit(glyph, xc, yc, glyph->w, glyph->h, screen); |
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43 xc += glyph->w; |
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44 } |
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45 else |
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46 xc += font->width; |
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47 } |
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48 } |
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49 |
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50 |
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51 void dmDrawBMTextVA(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt, va_list ap) |
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52 { |
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53 char *tmp = dm_strdup_vprintf(fmt, ap); |
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54 if (tmp != NULL) |
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55 { |
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56 dmDrawBMTextConst(screen, font, mode, xc, yc, tmp); |
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57 dmFree(tmp); |
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58 } |
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59 } |
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60 |
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61 |
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62 void dmDrawBMText(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt, ...) |
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63 { |
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64 va_list ap; |
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65 |
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66 va_start(ap, fmt); |
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67 dmDrawBMTextVA(screen, font, mode, xc, yc, fmt, ap); |
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68 va_end(ap); |
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69 } |
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70 |
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71 |
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72 DMBitmapFont *dmNewBitmapFont(int nglyphs, int width, int height) |
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73 { |
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74 DMBitmapFont *font = dmMalloc0(sizeof(DMBitmapFont)); |
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75 if (font == NULL) |
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76 return NULL; |
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77 |
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78 font->width = width; |
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79 font->height = height; |
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80 font->nglyphs = nglyphs; |
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81 font->glyphs = dmCalloc(nglyphs, sizeof(SDL_Surface *)); |
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82 if (font->glyphs == NULL) |
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83 { |
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84 dmFree(font); |
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85 return NULL; |
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86 } |
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87 |
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88 return font; |
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89 } |
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90 |
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91 |
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92 int dmFreeBitmapFont(DMBitmapFont *font) |
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93 { |
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94 int i; |
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95 |
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96 if (font == NULL) |
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97 return DMERR_NULLPTR; |
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98 |
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99 for (i = 0; i < font->nglyphs; i++) |
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100 { |
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101 if (font->glyphs[i] != NULL) |
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102 { |
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103 SDL_FreeSurface(font->glyphs[i]); |
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104 font->glyphs[i] = NULL; |
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105 } |
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106 } |
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107 |
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108 dmFree(font); |
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109 return DMERR_OK; |
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110 } |
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111 |
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112 |
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113 int dmCreateBitmapFontFromImage(SDL_Surface *image, int width, int height, DMBitmapFont **pfont) |
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114 { |
76 | 115 int nglyph, xc, yc, xglyphs, yglyphs; |
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116 DMBitmapFont *font; |
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117 |
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118 if (image->w < width || width < 4 || image->h < height || height < 4) |
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119 return DMERR_INVALID_ARGS; |
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120 |
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121 xglyphs = image->w / width; |
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122 yglyphs = image->h / height; |
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123 |
89
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124 if ((font = dmNewBitmapFont(xglyphs * yglyphs, width, height)) == NULL) |
65
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125 return DMERR_MALLOC; |
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126 |
76 | 127 /* |
70
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128 fprintf(stderr, "%d x %d split as %d x %d blocks => %d x %d = %d glyphs\n", |
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129 image->w, image->h, |
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130 width, height, |
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131 xglyphs, yglyphs, xglyphs * yglyphs); |
76 | 132 */ |
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133 |
76 | 134 nglyph = 0; |
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135 for (yc = 0; yc < yglyphs; yc++) |
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136 for (xc = 0; xc < xglyphs; xc++) |
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137 { |
76 | 138 SDL_Surface *glyph = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, |
65
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139 image->format->BitsPerPixel, |
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140 image->format->Rmask, |
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141 image->format->Gmask, |
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142 image->format->Bmask, |
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143 image->format->Amask); |
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144 |
76 | 145 if (glyph == NULL) |
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146 { |
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147 dmFreeBitmapFont(font); |
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148 return DMERR_MALLOC; |
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149 } |
70
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150 |
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151 SDL_Rect r; |
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152 r.x = xc * width; |
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153 r.y = yc * height; |
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154 r.w = width; |
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155 r.h = height; |
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156 |
76 | 157 SDL_BlitSurface(image, &r, glyph, NULL); |
65
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158 |
76 | 159 font->glyphs[nglyph++] = glyph; |
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160 } |
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161 |
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162 *pfont = font; |
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163 return DMERR_OK; |
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164 } |
73
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165 |
75
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166 |
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167 int dmLoadBitmapFont(DMResource *res, DMBitmapFont **pfont) |
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168 { |
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169 DMBitmapFont *font; |
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170 char magic[8]; |
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171 Uint16 version, nglyphs, maxglyph; |
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172 int width, height; |
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173 BOOL tsfont = FALSE; |
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174 |
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175 // Check magic and version |
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176 dmf_read_str(res, (Uint8 *) &magic, 6); |
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177 dmf_read_le16(res, &version); |
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178 |
89
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179 // Check if it is a legacy TSFONT file |
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180 if (memcmp(magic, TSFONT_MAGIC, 6) == 0) |
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181 { |
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182 // Yep, we handle these a bit differently |
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183 int encoding = dmfgetc(res); |
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184 tsfont = TRUE; |
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185 |
89
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186 if (version > TSFONT_VERSION) |
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187 return DMERR_VERSION; |
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188 |
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189 // There were only two encodings, 0 = none and 1 = RLE |
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190 // of which RLE was never actually used ... derp. |
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191 if (encoding != 0) |
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192 return DMERR_NOT_SUPPORTED; |
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|
193 } |
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|
194 else |
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195 { |
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196 if (memcmp(magic, DMFONT_MAGIC, 6) != 0) |
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197 return DMERR_INVALID; |
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198 |
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199 if (version > DMFONT_VERSION) |
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200 return DMERR_VERSION; |
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|
201 } |
75
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202 |
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203 // Check other data |
89
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204 if (tsfont) |
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205 { |
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|
206 nglyphs = dmfgetc(res); |
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207 maxglyph = 256; |
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208 } |
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|
209 else |
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|
210 { |
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|
211 dmf_read_le16(res, &nglyphs); |
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|
212 dmf_read_le16(res, &maxglyph); |
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|
213 } |
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214 |
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|
215 width = dmfgetc(res); |
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216 height = dmfgetc(res); |
75
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217 |
89
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218 if (tsfont) |
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219 { |
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220 // TSFONT color assigns (boolean) .. we discard this. |
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221 dmfgetc(res); |
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222 } |
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223 |
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224 if (width < DMFONT_MIN_WIDTH || |
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|
225 height < DMFONT_MIN_HEIGHT || |
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226 width > DMFONT_MAX_WIDTH || |
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227 height > DMFONT_MAX_HEIGHT || |
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228 nglyphs > DMFONT_MAX_GLYPHS || |
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229 maxglyph > DMFONT_MAX_GLYPHS || |
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|
230 maxglyph < 1) |
75
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231 return DMERR_INVALID_DATA; |
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|
232 |
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233 // Allocate font |
89
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234 if ((*pfont = font = dmNewBitmapFont(maxglyph, width, height)) == NULL) |
75
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|
235 return DMERR_MALLOC; |
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|
236 |
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237 // Read glyph data, if any |
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|
238 if (nglyphs > 0) |
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239 { |
89
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|
240 Uint32 i, BitsPerPixel, Rmask, Gmask, Bmask, Amask; |
75
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241 |
89
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242 if (tsfont) |
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|
243 { |
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|
244 BitsPerPixel = 8; |
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|
245 Rmask = Gmask = Bmask = Amask = 0; |
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|
246 } |
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|
247 else |
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|
248 { |
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|
249 BitsPerPixel = dmfgetc(res); |
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250 dmf_read_le32(res, &Rmask); |
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251 dmf_read_le32(res, &Gmask); |
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252 dmf_read_le32(res, &Bmask); |
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253 dmf_read_le32(res, &Amask); |
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254 } |
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255 |
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256 for (i = 0; i < nglyphs; i++) |
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257 { |
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258 int y; |
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259 Uint16 index; |
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260 Uint8 *pixels; |
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261 SDL_Surface *glyph; |
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262 |
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263 if (tsfont) |
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264 index = dmfgetc(res); |
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265 else |
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266 dmf_read_le16(res, &index); |
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267 |
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268 width = dmfgetc(res); |
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269 height = dmfgetc(res); |
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270 |
89
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271 if (width < DMFONT_MIN_WIDTH || |
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272 height < DMFONT_MIN_HEIGHT || |
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273 width > DMFONT_MAX_WIDTH || |
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274 height > DMFONT_MAX_HEIGHT || |
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275 index > DMFONT_MAX_GLYPHS) |
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276 return DMERR_INVALID_DATA; |
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277 |
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278 font->glyphs[index] = glyph = SDL_CreateRGBSurface( |
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279 SDL_SWSURFACE, width, height, |
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280 BitsPerPixel, Rmask, Gmask, |
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281 Bmask, |
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282 Amask); |
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283 |
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284 if (glyph == NULL) |
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285 return DMERR_MALLOC; |
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286 |
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287 pixels = glyph->pixels; |
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288 for (y = 0; y < glyph->h; y++) |
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289 { |
89
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290 if (dmfread(pixels, glyph->format->BytesPerPixel, glyph->w, res) != (size_t) glyph->w) |
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291 return DMERR_FREAD; |
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292 pixels += glyph->pitch; |
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293 } |
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294 } |
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295 } |
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296 |
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297 return DMERR_OK; |
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298 } |
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299 |
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300 |
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301 int dmSaveBitmapFont(DMResource *res, DMBitmapFont *font) |
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302 { |
89
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303 int count, n; |
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304 if (font == NULL) |
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305 return DMERR_NULLPTR; |
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306 |
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307 if (font->nglyphs > DMFONT_MAX_GLYPHS || |
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308 font->width > DMFONT_MAX_WIDTH || |
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309 font->height > DMFONT_MAX_HEIGHT || |
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310 font->width < DMFONT_MIN_WIDTH || |
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311 font->height < DMFONT_MIN_HEIGHT) |
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312 return DMERR_INVALID_DATA; |
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313 |
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314 // Count number of actually existing glyphs |
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315 for (count = n = 0; n < font->nglyphs; n++) |
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316 if (font->glyphs[n] != NULL) count++; |
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317 |
89
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318 // Write the DMFONT header |
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319 if (!dmf_write_str(res, (Uint8 *) DMFONT_MAGIC, 6)) |
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320 return DMERR_FWRITE; |
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321 |
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322 dmf_write_le16(res, DMFONT_VERSION); |
89
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323 dmf_write_le16(res, count); // # of glyphs actually |
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324 dmf_write_le16(res, font->nglyphs); // Max glyph # |
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325 dmfputc(font->width, res); |
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326 dmfputc(font->height, res); |
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327 |
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328 if (font->nglyphs > 0) |
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329 { |
75
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330 int i; |
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331 SDL_Surface *glyph = font->glyphs[0]; |
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332 |
89
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333 // If there are actual glyphs stored, save thi |
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334 dmfputc(glyph->format->BitsPerPixel, res); |
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335 dmf_write_le32(res, glyph->format->Rmask); |
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336 dmf_write_le32(res, glyph->format->Gmask); |
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337 dmf_write_le32(res, glyph->format->Bmask); |
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338 dmf_write_le32(res, glyph->format->Amask); |
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339 |
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340 for (i = 0; i < font->nglyphs; i++) |
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341 { |
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342 glyph = font->glyphs[i]; |
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343 if (glyph != NULL) |
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344 { |
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345 int y; |
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346 Uint8 *pixels = glyph->pixels; |
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347 |
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348 if (glyph->w < DMFONT_MIN_WIDTH || |
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349 glyph->h < DMFONT_MIN_HEIGHT || |
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350 glyph->w > DMFONT_MAX_WIDTH || |
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351 glyph->h > DMFONT_MAX_HEIGHT) |
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352 return DMERR_INVALID_DATA; |
75
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353 |
89
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354 // Each glyph has its table index and w/h stored |
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|
355 dmf_write_le16(res, i); |
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356 dmf_write_le16(res, glyph->w); |
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357 dmf_write_le16(res, glyph->h); |
75
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358 |
89
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|
359 // Write the pixel data |
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360 for (y = 0; y < glyph->h; y++) |
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|
361 { |
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|
362 if (dmfwrite(pixels, glyph->format->BytesPerPixel, glyph->w, res) != (size_t) glyph->w) |
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|
363 return DMERR_FWRITE; |
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Various improvements in bitmapped font support, and addition of legacy
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|
364 pixels += glyph->pitch; |
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Various improvements in bitmapped font support, and addition of legacy
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|
365 } |
75
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Initial implementation of loading and saving of bitmap fonts.
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|
366 } |
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Initial implementation of loading and saving of bitmap fonts.
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|
367 } |
73
295d08376744
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|
368 } |
75
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Initial implementation of loading and saving of bitmap fonts.
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|
369 |
73
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|
370 return DMERR_OK; |
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|
371 } |