| 1 | #! perl |
1 | #! perl |
| 2 | |
2 | |
| 3 | #:META:X_RESOURCE:%.expr:string:background expression |
3 | #:META:X_RESOURCE:%.expr:string:background expression |
| 4 | #:META:X_RESOURCE:%.enable:boolean:some boolean |
4 | #:META:X_RESOURCE:%.enable:boolean:some boolean |
| 5 | #:META:X_RESOURCE:%.extra.*:value:extra config |
5 | #:META:X_RESOURCE:%.extra.:value:extra config |
| 6 | |
6 | |
| 7 | our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; |
7 | our $EXPR; |
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8 | #$EXPR = 'move W * 0.1, -H * 0.1, resize W * 0.5, H * 0.5, repeat_none load "opensource.png"'; |
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9 | $EXPR = 'border; move -X, -Y, load "argb.png"'; |
| 8 | $EXPR = ' |
10 | #$EXPR = ' |
| 9 | rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
11 | # rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
| 10 | clip X, Y, W, H, repeat_mirror, |
12 | # clip X, Y, W, H, repeat_mirror, |
| 11 | load "/root/pix/das_fette_schwein.jpg" |
13 | # load "/root/pix/das_fette_schwein.jpg" |
| 12 | '; |
14 | #'; |
| 13 | $EXPR = 'solid "red"'; |
15 | #$EXPR = 'solid "red"'; |
| 14 | #$EXPR = 'blur root, 10, 10' |
16 | #$EXPR = 'blur root, 10, 10' |
| 15 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
17 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
| 16 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
18 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
| 17 | |
19 | |
| 18 | use Safe; |
20 | use Safe; |
| 19 | |
21 | |
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22 | our $border; |
| 20 | our ($bgdsl_self, $old, $new); |
23 | our ($bgdsl_self, $old, $new); |
| 21 | our ($l, $t, $w, $h); |
24 | our ($l, $t, $w, $h); |
| 22 | |
25 | |
| 23 | # enforce at least this interval between updates |
26 | # enforce at least this interval between updates |
| 24 | our $MIN_INTERVAL = 1/100; |
27 | our $MIN_INTERVAL = 1/100; |
| 25 | |
28 | |
| 26 | { |
29 | { |
| 27 | package urxvt::bgdsl; # background language |
30 | package urxvt::bgdsl; # background language |
| 28 | |
31 | |
| 29 | *repeat_black = \&urxvt::RepeatNone; #TODO wtf |
32 | # *repeat_empty = \&urxvt::RepeatNone; |
| 30 | *repeat_wrap = \&urxvt::RepeatNormal; |
33 | # *repeat_tile = \&urxvt::RepeatNormal; |
| 31 | *repeat_pad = \&urxvt::RepeatPad; |
34 | # *repeat_pad = \&urxvt::RepeatPad; |
| 32 | *repeat_mirror = \&urxvt::RepeatReflect; |
35 | # *repeat_mirror = \&urxvt::RepeatReflect; |
| 33 | |
36 | |
| 34 | =head2 PROVIDERS/GENERATORS |
37 | =head2 PROVIDERS/GENERATORS |
| 35 | |
38 | |
| 36 | =over 4 |
39 | =over 4 |
| 37 | |
40 | |
| … | |
… | |
| 56 | $img |
59 | $img |
| 57 | } |
60 | } |
| 58 | |
61 | |
| 59 | =back |
62 | =back |
| 60 | |
63 | |
| 61 | =head2 OPERATORS |
64 | =head2 VARIABLES |
| 62 | |
65 | |
| 63 | =over 4 |
66 | =over 4 |
| 64 | |
67 | |
| 65 | =cut |
68 | =cut |
| 66 | |
69 | |
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70 | sub X() { $new->{position_sensitive} = 1; $l } |
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71 | sub Y() { $new->{position_sensitive} = 1; $t } |
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72 | sub W() { $new->{size_sensitive} = 1; $w } |
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73 | sub H() { $new->{size_sensitive} = 1; $h } |
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74 | |
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75 | sub now() { urxvt::NOW } |
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76 | |
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77 | sub again($) { |
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78 | $new->{again} = $_[0]; |
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79 | } |
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80 | |
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81 | sub counter($) { |
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82 | $new->{again} = $_[0]; |
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83 | $bgdsl_self->{counter} + 0 |
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84 | } |
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85 | |
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86 | =back |
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87 | |
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88 | =head2 TILING MODES |
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89 | |
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90 | The following operators modify the tiling mode of an image, that is, the |
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91 | way that pixels outside the image area are painted when the image is used. |
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92 | |
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93 | =over 4 |
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94 | |
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95 | =item tile $img |
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96 | |
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97 | Tiles the whole plane with the image and returns this new image - or in |
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98 | other words, it returns a copy of the image in plane tiling mode. |
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99 | |
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100 | =item mirror $img |
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101 | |
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102 | Similar to tile, but reflects the image each time it uses a new copy, so |
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103 | that top edges always touch top edges, right edges always touch right |
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104 | edges and so on (with normal tiling, left edges always touch right edges |
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105 | and top always touch bottom edges). |
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106 | |
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107 | =item pad $img |
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108 | |
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109 | Takes an image and modifies it so that all pixels outside the image area |
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110 | become transparent. This mode is most useful when you want to place an |
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111 | image over another image or the background colour while leaving all |
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112 | background pixels outside the image unchanged. |
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113 | |
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114 | =item extend $img |
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115 | |
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116 | Extends the image over the whole plane, using the closest pixel in the |
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117 | area outside the image. This mode is mostly useful when you more complex |
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118 | filtering operations and want the pixels outside the image to have the |
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119 | same values as the pixels near the edge. |
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120 | |
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121 | =cut |
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122 | |
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123 | sub pad($) { |
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124 | my $img = $_[0]->clone; |
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125 | $img->repeat_mode (urxvt::RepeatNone); |
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126 | $img |
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127 | } |
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128 | |
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129 | sub tile($) { |
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130 | my $img = $_[0]->clone; |
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131 | $img->repeat_mode (urxvt::RepeatNormal); |
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132 | $img |
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133 | } |
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134 | |
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135 | sub mirror($) { |
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136 | my $img = $_[0]->clone; |
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137 | $img->repeat_mode (urxvt::RepeatReflect); |
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138 | $img |
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139 | } |
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140 | |
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141 | sub extend($) { |
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142 | my $img = $_[0]->clone; |
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143 | $img->repeat_mode (urxvt::RepeatPad); |
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144 | $img |
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145 | } |
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146 | |
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147 | =back |
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148 | |
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149 | =head2 PIXEL OPERATORS |
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150 | |
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151 | The following operators modify the image pixels in various ways. |
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152 | |
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153 | =over 4 |
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154 | |
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155 | =item clone $img |
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156 | |
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157 | Returns an exact copy of the image. |
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158 | |
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159 | =cut |
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160 | |
| 67 | # sub clone($) { |
161 | sub clone($) { |
| 68 | # $_[0]->clone |
162 | $_[0]->clone |
| 69 | # } |
163 | } |
| 70 | |
164 | |
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165 | =item clip $img |
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166 | |
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167 | =item clip $width, $height, $img |
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168 | |
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169 | =item clip $x, $y, $width, $height, $img |
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170 | |
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171 | Clips an image to the given rectangle. If the rectangle is outside the |
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172 | image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is |
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173 | larger than the image, then the tiling mode defines how the extra pixels |
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174 | will be filled. |
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175 | |
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176 | If C<$x> an C<$y> are missing, then C<0> is assumed for both. |
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177 | |
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178 | If C<$width> and C<$height> are missing, then the window size will be |
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179 | assumed. |
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180 | |
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181 | Example: load an image, blur it, and clip it to the window size to save |
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182 | memory. |
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183 | |
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184 | clip blur 10, load "mybg.png" |
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185 | |
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186 | =cut |
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187 | |
| 71 | sub clip($$$$$;$) { |
188 | sub clip($;$$;$$) { |
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189 | my $img = pop; |
| 72 | my $img = pop; |
190 | my $h = pop || H; |
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191 | my $w = pop || W; |
| 73 | $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4]) |
192 | $img->sub_rect ($_[0], $_[1], $w, $h) |
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193 | } |
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194 | |
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195 | =item scale $img |
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196 | |
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197 | =item scale $size_percent, $img |
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198 | |
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199 | =item scale $width_percent, $height_percent, $img |
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200 | |
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201 | Scales the image by the given percentages in horizontal |
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202 | (C<$width_percent>) and vertical (C<$height_percent>) direction. |
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203 | |
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204 | If only one percentage is give, it is used for both directions. |
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205 | |
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206 | If no percentages are given, scales the image to the window size without |
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207 | keeping aspect. |
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208 | |
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209 | =item resize $width, $height, $img |
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210 | |
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211 | Resizes the image to exactly C<$width> times C<$height> pixels. |
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212 | |
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213 | =cut |
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214 | |
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215 | #TODO: maximise, maximise_fill? |
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216 | |
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217 | sub scale($$$) { |
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218 | my $img = pop; |
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219 | |
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220 | @_ == 2 ? $img->scale ($_[0] * $img->w * 0.01, $_[1] * $img->h * 0.01) |
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221 | : @_ ? $img->scale ($_[0] * $img->w * 0.01, $_[0] * $img->h * 0.01) |
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222 | : $img->scale (W, H) |
| 74 | } |
223 | } |
| 75 | |
224 | |
| 76 | sub resize($$$) { |
225 | sub resize($$$) { |
| 77 | my $img = pop; |
226 | my $img = pop; |
| 78 | $img->scale ($_[0], $_[1]) |
227 | $img->scale ($_[0], $_[1]) |
| 79 | } |
228 | } |
| 80 | |
229 | |
| 81 | # TODO: ugly |
230 | # TODO: ugly |
| 82 | sub move($$;$) { |
231 | sub move($$;$) { |
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232 | my $img = pop->clone; |
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233 | $img->move ($_[0], $_[1]); |
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234 | $img |
| 83 | my $img = pop; |
235 | # my $img = pop; |
| 84 | $img->sub_rect ( |
236 | # $img->sub_rect ( |
| 85 | $_[0], $_[1], |
237 | # $_[0], $_[1], |
| 86 | $img->w, $img->h, |
238 | # $img->w, $img->h, |
| 87 | $_[2], |
239 | # $_[2], |
| 88 | ) |
240 | # ) |
| 89 | } |
241 | } |
| 90 | |
242 | |
| 91 | sub rotate($$$$$$;$) { |
243 | sub rotate($$$$$$) { |
| 92 | my $img = pop; |
244 | my $img = pop; |
| 93 | $img->rotate ( |
245 | $img->rotate ( |
| 94 | $_[0], |
246 | $_[0], |
| 95 | $_[1], |
247 | $_[1], |
| 96 | $_[2] * $img->w * .01, |
248 | $_[2] * $img->w * .01, |
| 97 | $_[3] * $img->h * .01, |
249 | $_[3] * $img->h * .01, |
| 98 | $_[4] * (3.14159265 / 180), |
250 | $_[4] * (3.14159265 / 180), |
| 99 | $_[5], |
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| 100 | ) |
251 | ) |
| 101 | } |
252 | } |
| 102 | |
253 | |
| 103 | sub blur($$$) { |
254 | sub blur($$;$) { |
| 104 | my ($rh, $rv, $img) = @_; |
255 | my $img = pop; |
| 105 | |
256 | |
| 106 | $img->blur ($rh, $rv); |
257 | $img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0]); |
| 107 | } |
258 | } |
| 108 | |
259 | |
| 109 | sub contrast($$;$$;$) { |
260 | sub contrast($$;$$;$) { |
| 110 | my $img = pop; |
261 | my $img = pop; |
| 111 | my ($r, $g, $b, $a) = @_; |
262 | my ($r, $g, $b, $a) = @_; |
| … | |
… | |
| 128 | $img = $img->clone; |
279 | $img = $img->clone; |
| 129 | $img->brightness ($r, $g, $b, $a); |
280 | $img->brightness ($r, $g, $b, $a); |
| 130 | $img |
281 | $img |
| 131 | } |
282 | } |
| 132 | |
283 | |
| 133 | sub X() { $new->{position_sensitive} = 1; $l } |
284 | =back |
| 134 | sub Y() { $new->{position_sensitive} = 1; $t } |
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| 135 | sub W() { $new->{size_sensitive} = 1; $w } |
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| 136 | sub H() { $new->{size_sensitive} = 1; $h } |
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| 137 | |
285 | |
| 138 | sub now() { urxvt::NOW } |
286 | =head2 SETTINGS |
| 139 | |
287 | |
| 140 | sub again($) { |
288 | =over 4 |
| 141 | $new->{again} = $_[0]; |
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| 142 | } |
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| 143 | |
289 | |
| 144 | sub counter($) { |
290 | =item border $respect_border=1 |
| 145 | $new->{again} = $_[0]; |
291 | |
| 146 | $bgdsl_self->{counter} + 0 |
292 | Sets whether the image should respect the terminal border (argument true |
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293 | or missing), or whether it should fill the whole window (the default). |
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294 | |
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295 | By default, the image will cover the whole toplevel window. If C<border> |
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296 | is enabled, then it will only fill the character area and leave a normal |
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297 | border in the background colour around it and behind the scrollbar. |
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298 | |
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299 | =cut |
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300 | |
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301 | sub border { |
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302 | $border = @_ ? $_[0] : 1; |
| 147 | } |
303 | } |
| 148 | |
304 | |
| 149 | =back |
305 | =back |
| 150 | |
306 | |
| 151 | =cut |
307 | =cut |
| … | |
… | |
| 182 | $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
338 | $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
| 183 | |
339 | |
| 184 | # set environment to evaluate user expression |
340 | # set environment to evaluate user expression |
| 185 | |
341 | |
| 186 | local $bgdsl_self = $self; |
342 | local $bgdsl_self = $self; |
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343 | local $border; |
| 187 | |
344 | |
| 188 | local $old = $self->{state}; |
345 | local $old = $self->{state}; |
| 189 | local $new = my $state = $self->{state} = {}; |
346 | local $new = my $state = $self->{state} = {}; |
| 190 | |
347 | |
| 191 | ($l, $t, $w, $h) = |
348 | ($l, $t, $w, $h) = |
| 192 | $self->get_geometry; |
349 | $self->get_geometry; |
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350 | |
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351 | warn "$l,$t,$w,$h\n";#d# |
| 193 | |
352 | |
| 194 | # evaluate user expression |
353 | # evaluate user expression |
| 195 | |
354 | |
| 196 | my $img = eval { $self->{expr}->() }; |
355 | my $img = eval { $self->{expr}->() }; |
| 197 | warn $@ if $@;#d# |
356 | warn $@ if $@;#d# |
| … | |
… | |
| 244 | # prepare and set background pixmap |
403 | # prepare and set background pixmap |
| 245 | |
404 | |
| 246 | $img = $img->sub_rect (0, 0, $w, $h) |
405 | $img = $img->sub_rect (0, 0, $w, $h) |
| 247 | if $img->w != $w || $img->h != $h; |
406 | if $img->w != $w || $img->h != $h; |
| 248 | |
407 | |
| 249 | $self->set_background ($img); |
408 | $self->set_background ($img, $border); |
| 250 | $self->scr_recolour (0); |
409 | $self->scr_recolour (0); |
| 251 | $self->want_refresh; |
410 | $self->want_refresh; |
| 252 | } |
411 | } |
| 253 | |
412 | |
| 254 | sub on_start { |
413 | sub on_start { |
| 255 | my ($self) = @_; |
414 | my ($self) = @_; |
| 256 | |
415 | |
| 257 | warn $self->x_resource ("background.enable"); |
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| 258 | |
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| 259 | $self->set_expr (parse_expr $EXPR); |
416 | $self->set_expr (parse_expr $EXPR); |
| 260 | |
417 | |
| 261 | () |
418 | () |
| 262 | } |
419 | } |
| 263 | |
420 | |
