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annotate samples/freetype.tp @ 321:3edd0169311a

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Add basic binding to Freetype2
author Michael Pavone <pavone@retrodev.com>
date Sun, 22 Mar 2015 19:10:32 -0700
parents
children 615f23450f8f
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321
3edd0169311a Add basic binding to Freetype2
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1 #{
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2 import: [
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3 video
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4 timer
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5 ] from: (sdl subsystems)
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6
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7 import: [
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8 quit
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9 ] from: (sdl eventTypes)
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10
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11 import: [
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12 streaming
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13 ] from: (sdl textureAccess)
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14
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15 import: [
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16 bgra8888
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17 ] from: (sdl pixelFormats)
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18
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19 hex2 <- :num {
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20 val <- hex: num
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21 if: (val length) < 2 {
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22 val <- "0" . val
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23 }
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24 val
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25 }
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26
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27 main <- :args {
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28 retcode <- 0
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29 dpi <- 96
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30 arg <- 1
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31 expectVal <- false
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32 optName <- ""
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33 path <- ""
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34 while: { arg < (args length) } do: {
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35 curArg <- args get: arg
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36 if: expectVal {
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37 if: optName = "--dpi" || optName = "-d" {
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38 dpi <- curArg int32
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39 } else: {
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40 print: "Unrecognized option: " . optName . "\n"
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41 }
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42 expectVal <- false
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43 } else: {
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44 if: (curArg startsWith?: "-") {
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45 expectVal <- true
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46 optName <- curArg
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47 } else: {
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48 path <- curArg
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49 }
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50 }
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51 arg <- arg + 1
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52 }
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53 ft <- freetype init
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54 maybeFace <- ft faceFromPath: path index: 0
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55 charCodes <- #[]
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56 maybeFace value: :face {
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57 charMap <- face charmap
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58 foreach: charMap :char glyph {
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59 print: "Char: " . char . ", glyph index: " . glyph . "\n"
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60 charCodes append: char
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61 }
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62
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63 if: (sdl init: (video or timer)) = 0 {
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64 (sdl createWindow: "Freetype Test" pos: 0 0 size: 512 512 flags: 0u32) value: :window {
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65 (window createRenderer: -1 flags: ((window renderOpts) accelerated)) value: :renderer {
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66 renderer drawColor!: (sdl r: 255u8 g: 255u8 b: 255u8)
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67 (renderer createTexture: bgra8888 access: streaming width: 512 height: 512) value: :drawTex {
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68 drawTex blendMode!: ((sdl blendModes) blend)
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69 drawTex lockRect: (sdl rect: 0 0 size: 512 512) with: :bytearr pitch {
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70 i <- 0
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71 n <- charCodes length
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72 maxHeight <- 0
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73 startY <- 0
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74 startX <- 0
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75 slot <- face glyphSlot
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76 face setCharSize: 12.0 res: dpi
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77 while: { i < n && startY < 512 } do: {
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78 charCode <- charCodes get: i
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79 glyphIndex <- charMap get: charCode else: { 0 }
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80 rescode <- face loadGlyph: glyphIndex flags: ((freetype loadFlags) render)
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81 if: rescode = 0 {
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82 height <- slot bitmapRows
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83 width <- slot bitmapWidth
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84 if: startX + width > 512 {
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85 startY <- startY + maxHeight
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86 startX <- 0
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87 maxHeight <- 0
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88 }
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89
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90 if: height > maxHeight {
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91 maxHeight <- height
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92 }
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93
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94 if: height + startY > 512 {
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95 startY <- 512
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96 } else: {
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97 print: "Rendering glyph " . glyphIndex . " to " . startX . ", " . startY . " (" . (startY * pitch + 4 * startX) . ")\n"
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98 print: "Width: " . width . ", Height: " . height . "\n"
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99 destY <- startY
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100 srcY <- 0
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101 srcPitch <- slot bitmapPitch
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102 srcBitmap <- slot bitmapData
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103 while: { srcY < height } do: {
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104 line <- ""
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105 destIndex <- destY * pitch + startX * 4
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106 srcIndex <- srcY * srcPitch
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107 destX <- startX
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108 srcX <- 0
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109 while: { srcX < width } do: {
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110 srcPixel <- srcBitmap get: srcIndex
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111 bytearr set: destIndex srcPixel
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112 destIndex <- destIndex + 1
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113 bytearr set: destIndex 0u8
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114 destIndex <- destIndex + 1
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115 bytearr set: destIndex 0u8
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116 destIndex <- destIndex + 1
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117 bytearr set: destIndex 0u8
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118 line <- line . " " . (hex2: srcPixel)
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119
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120 destX <- destX + 1
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121 srcX <- srcX + 1
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122 destIndex <- destIndex + 1
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123 srcIndex <- srcIndex + 1
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124 }
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125 print: line . "\n"
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126 destY <- destY + 1
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127 srcY <- srcY + 1
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128 }
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129 }
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130 startX <- startX + width
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131
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132 i <- i + 1
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133 } else: {
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134 print: "Got error " . rescode . " when loading glyph " . glyphIndex . "\n"
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135 }
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136 }
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137 }
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138 continue? <- true
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139 while: { continue? } do: {
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140 renderer clear
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141 drawTex copy
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142 renderer present
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143 event <- option none
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144 while: {
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145 event <- sdl pollEvent
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146 event value?
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147 } do: {
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148 event value: :ev {
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149 if: (ev type) = quit {
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150 continue? <- false
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151 }
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152 } none: {}
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153 }
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154 }
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155 } none: {
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156 print: "Failed to create texture\n"
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
157 retcode <- 1
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
158 }
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
159 } none: {
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
160 print: "Failed to create renderer\n"
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
161 retcode <- 1
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
162 }
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
163 window destroy
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
164 } none: {
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
165 print: "Failed to create window\n"
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
166 retcode <- 1
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
167 }
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
168 } else: {
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
169 print: "Failed to initialize SDL\n"
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
170 retcode <- 1
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
171 }
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
172 } none: {
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
173 retcode <- 1
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
174 print: "Failed to load font face from " . path . "\n"
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
175 }
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
176
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
177 ft destroy
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
178 retcode
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
179 }
3edd0169311a Add basic binding to Freetype2
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
180 }