| 1 | #! perl |
1 | #! perl |
| 2 | |
2 | |
| 3 | our $EXPR = 'move load "/root/pix/das_fette_schwein.jpg", repeat_wrap, X, Y'; |
3 | #:META:X_RESOURCE:%.expr:string:background expression |
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4 | #:META:X_RESOURCE:%.enable:boolean:some boolean |
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5 | #:META:X_RESOURCE:%.extra.:value:extra config |
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6 | |
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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 = 'move -X, -Y, load "argb.png"'; |
| 4 | $EXPR = ' |
10 | #$EXPR = ' |
| 5 | rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
11 | # rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
| 6 | clip X, Y, W, H, repeat_mirror, |
12 | # clip X, Y, W, H, repeat_mirror, |
| 7 | load "/root/pix/das_fette_schwein.jpg" |
13 | # load "/root/pix/das_fette_schwein.jpg" |
| 8 | '; |
14 | #'; |
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15 | #$EXPR = 'solid "red"'; |
| 9 | #$EXPR = 'blur root, 10, 10' |
16 | #$EXPR = 'blur root, 10, 10' |
| 10 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
17 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
| 11 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
18 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
| 12 | |
19 | |
| 13 | use Safe; |
20 | use Safe; |
| 14 | |
21 | |
| 15 | our ($bgdsl_self, $old, $new); |
22 | our ($bgdsl_self, $old, $new); |
| 16 | our ($l, $t, $w, $h); |
23 | our ($x, $y, $w, $h); |
| 17 | |
24 | |
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25 | # enforce at least this interval between updates |
| 18 | our $MIN_INTERVAL = 1/60; |
26 | our $MIN_INTERVAL = 1/100; |
| 19 | |
27 | |
| 20 | { |
28 | { |
| 21 | package urxvt::bgdsl; # background language |
29 | package urxvt::bgdsl; # background language |
| 22 | |
30 | |
| 23 | *repeat_black = \&urxvt::RepeatNone; #TODO wtf |
31 | =head2 PROVIDERS/GENERATORS |
| 24 | *repeat_wrap = \&urxvt::RepeatNormal; |
32 | |
| 25 | *repeat_pad = \&urxvt::RepeatPad; |
33 | =over 4 |
| 26 | *repeat_mirror = \&urxvt::RepeatReflect; |
34 | |
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35 | =item load $path |
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36 | |
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37 | Loads the image at the given C<$path>. The image is set to plane tiling |
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38 | mode. |
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39 | |
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40 | |
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41 | |
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42 | =cut |
| 27 | |
43 | |
| 28 | sub load($) { |
44 | sub load($) { |
| 29 | my ($path) = @_; |
45 | my ($path) = @_; |
| 30 | |
46 | |
| 31 | $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); |
47 | $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); |
| … | |
… | |
| 34 | sub root() { |
50 | sub root() { |
| 35 | $new->{rootpmap_sensitive} = 1; |
51 | $new->{rootpmap_sensitive} = 1; |
| 36 | die "root op not supported, exg, we need you"; |
52 | die "root op not supported, exg, we need you"; |
| 37 | } |
53 | } |
| 38 | |
54 | |
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55 | sub solid($;$$) { |
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56 | my $img = $bgdsl_self->new_img (urxvt::PictStandardARGB32, $_[1] || 1, $_[2] || 1); |
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57 | $img->fill ($_[0]); |
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58 | $img |
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59 | } |
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60 | |
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61 | =back |
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62 | |
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63 | =head2 VARIABLES |
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64 | |
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65 | =over 4 |
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66 | |
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67 | =cut |
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68 | |
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69 | sub X() { $new->{position_sensitive} = 1; $x } |
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70 | sub Y() { $new->{position_sensitive} = 1; $y } |
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71 | sub W() { $new->{size_sensitive} = 1; $w } |
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72 | sub H() { $new->{size_sensitive} = 1; $h } |
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73 | |
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74 | sub now() { urxvt::NOW } |
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75 | |
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76 | sub again($) { |
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77 | $new->{again} = $_[0]; |
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78 | } |
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79 | |
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80 | sub counter($) { |
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81 | $new->{again} = $_[0]; |
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82 | $bgdsl_self->{counter} + 0 |
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83 | } |
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84 | |
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85 | =back |
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86 | |
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87 | =head2 TILING MODES |
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88 | |
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89 | The following operators modify the tiling mode of an image, that is, the |
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90 | way that pixels outside the image area are painted when the image is used. |
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91 | |
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92 | =over 4 |
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93 | |
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94 | =item tile $img |
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95 | |
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96 | Tiles the whole plane with the image and returns this new image - or in |
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97 | other words, it returns a copy of the image in plane tiling mode. |
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98 | |
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99 | =item mirror $img |
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100 | |
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101 | Similar to tile, but reflects the image each time it uses a new copy, so |
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102 | that top edges always touch top edges, right edges always touch right |
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103 | edges and so on (with normal tiling, left edges always touch right edges |
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104 | and top always touch bottom edges). |
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105 | |
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106 | =item pad $img |
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107 | |
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108 | Takes an image and modifies it so that all pixels outside the image area |
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109 | become transparent. This mode is most useful when you want to place an |
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110 | image over another image or the background colour while leaving all |
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111 | background pixels outside the image unchanged. |
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112 | |
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113 | =item extend $img |
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114 | |
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115 | Extends the image over the whole plane, using the closest pixel in the |
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116 | area outside the image. This mode is mostly useful when you more complex |
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117 | filtering operations and want the pixels outside the image to have the |
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118 | same values as the pixels near the edge. |
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119 | |
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120 | =cut |
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121 | |
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122 | sub pad($) { |
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123 | my $img = $_[0]->clone; |
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124 | $img->repeat_mode (urxvt::RepeatNone); |
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125 | $img |
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126 | } |
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127 | |
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128 | sub tile($) { |
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129 | my $img = $_[0]->clone; |
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130 | $img->repeat_mode (urxvt::RepeatNormal); |
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131 | $img |
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132 | } |
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133 | |
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134 | sub mirror($) { |
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135 | my $img = $_[0]->clone; |
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136 | $img->repeat_mode (urxvt::RepeatReflect); |
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137 | $img |
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138 | } |
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139 | |
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140 | sub extend($) { |
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141 | my $img = $_[0]->clone; |
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142 | $img->repeat_mode (urxvt::RepeatPad); |
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143 | $img |
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144 | } |
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145 | |
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146 | =back |
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147 | |
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148 | =head2 PIXEL OPERATORS |
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149 | |
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150 | The following operators modify the image pixels in various ways. |
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151 | |
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152 | =over 4 |
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153 | |
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154 | =item clone $img |
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155 | |
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156 | Returns an exact copy of the image. |
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157 | |
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158 | =cut |
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159 | |
| 39 | # sub clone($) { |
160 | sub clone($) { |
| 40 | # $_[0]->clone |
161 | $_[0]->clone |
| 41 | # } |
162 | } |
| 42 | |
163 | |
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164 | =item clip $img |
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165 | |
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166 | =item clip $width, $height, $img |
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167 | |
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168 | =item clip $x, $y, $width, $height, $img |
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169 | |
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170 | Clips an image to the given rectangle. If the rectangle is outside the |
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171 | image area (e.g. when C<$x> or C<$y> are negative) or the rectangle is |
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172 | larger than the image, then the tiling mode defines how the extra pixels |
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173 | will be filled. |
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174 | |
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175 | If C<$x> an C<$y> are missing, then C<0> is assumed for both. |
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176 | |
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177 | If C<$width> and C<$height> are missing, then the window size will be |
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178 | assumed. |
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179 | |
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180 | Example: load an image, blur it, and clip it to the window size to save |
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181 | memory. |
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182 | |
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183 | clip blur 10, load "mybg.png" |
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184 | |
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185 | =cut |
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186 | |
| 43 | sub clip($$$$$;$) { |
187 | sub clip($;$$;$$) { |
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188 | my $img = pop; |
| 44 | my $img = pop; |
189 | my $h = pop || H; |
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190 | my $w = pop || W; |
| 45 | $img->sub_rect ($_[0], $_[1], $_[2], $_[3], $_[4]) |
191 | $img->sub_rect ($_[0], $_[1], $w, $h) |
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192 | } |
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193 | |
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194 | =item scale $img |
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195 | |
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196 | =item scale $size_percent, $img |
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197 | |
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198 | =item scale $width_percent, $height_percent, $img |
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199 | |
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200 | Scales the image by the given percentages in horizontal |
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201 | (C<$width_percent>) and vertical (C<$height_percent>) direction. |
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202 | |
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203 | If only one percentage is give, it is used for both directions. |
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204 | |
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205 | If no percentages are given, scales the image to the window size without |
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206 | keeping aspect. |
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207 | |
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208 | =item resize $width, $height, $img |
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209 | |
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210 | Resizes the image to exactly C<$width> times C<$height> pixels. |
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211 | |
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212 | =cut |
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213 | |
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214 | #TODO: maximise, maximise_fill? |
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215 | |
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216 | sub scale($$$) { |
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217 | my $img = pop; |
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218 | |
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219 | @_ == 2 ? $img->scale ($_[0] * $img->w * 0.01, $_[1] * $img->h * 0.01) |
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220 | : @_ ? $img->scale ($_[0] * $img->w * 0.01, $_[0] * $img->h * 0.01) |
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221 | : $img->scale (W, H) |
| 46 | } |
222 | } |
| 47 | |
223 | |
| 48 | sub resize($$$) { |
224 | sub resize($$$) { |
| 49 | my $img = pop; |
225 | my $img = pop; |
| 50 | $img->scale ($_[0], $_[1]) |
226 | $img->scale ($_[0], $_[1]) |
| 51 | } |
227 | } |
| 52 | |
228 | |
| 53 | # TODO: ugly |
229 | # TODO: ugly |
| 54 | sub move($$;$) { |
230 | sub move($$;$) { |
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231 | my $img = pop->clone; |
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232 | $img->move ($_[0], $_[1]); |
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233 | $img |
| 55 | my $img = pop; |
234 | # my $img = pop; |
| 56 | $img->sub_rect ( |
235 | # $img->sub_rect ( |
| 57 | $_[0], $_[1], |
236 | # $_[0], $_[1], |
| 58 | $img->w, $img->h, |
237 | # $img->w, $img->h, |
| 59 | $_[2], |
238 | # $_[2], |
| 60 | ) |
239 | # ) |
| 61 | } |
240 | } |
| 62 | |
241 | |
| 63 | sub rotate($$$$$$;$) { |
242 | sub rotate($$$$$$) { |
| 64 | my $img = pop; |
243 | my $img = pop; |
| 65 | $img->rotate ( |
244 | $img->rotate ( |
| 66 | $_[0], |
245 | $_[0], |
| 67 | $_[1], |
246 | $_[1], |
| 68 | $_[2] * $img->w * .01, |
247 | $_[2] * $img->w * .01, |
| 69 | $_[3] * $img->h * .01, |
248 | $_[3] * $img->h * .01, |
| 70 | $_[4] * (3.14159265 / 180), |
249 | $_[4] * (3.14159265 / 180), |
| 71 | $_[5], |
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| 72 | ) |
250 | ) |
| 73 | } |
251 | } |
| 74 | |
252 | |
| 75 | sub blur($$$) { |
253 | sub blur($$;$) { |
| 76 | my ($rh, $rv, $img) = @_; |
254 | my $img = pop; |
| 77 | |
255 | |
| 78 | $img = $img->clone; |
256 | $img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0]); |
| 79 | $img->blur ($rh, $rv); |
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| 80 | $img |
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| 81 | } |
257 | } |
| 82 | |
258 | |
| 83 | sub contrast($$;$$;$) { |
259 | sub contrast($$;$$;$) { |
| 84 | my $img = pop; |
260 | my $img = pop; |
| 85 | my ($r, $g, $b, $a) = @_; |
261 | my ($r, $g, $b, $a) = @_; |
| … | |
… | |
| 102 | $img = $img->clone; |
278 | $img = $img->clone; |
| 103 | $img->brightness ($r, $g, $b, $a); |
279 | $img->brightness ($r, $g, $b, $a); |
| 104 | $img |
280 | $img |
| 105 | } |
281 | } |
| 106 | |
282 | |
| 107 | sub X() { $new->{position_sensitive} = 1; $l } |
283 | =back |
| 108 | sub Y() { $new->{position_sensitive} = 1; $t } |
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| 109 | sub W() { $new->{size_sensitive} = 1; $w } |
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| 110 | sub H() { $new->{size_sensitive} = 1; $h } |
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| 111 | |
284 | |
| 112 | sub now() { urxvt::NOW } |
285 | =cut |
| 113 | |
286 | |
| 114 | sub again($) { |
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| 115 | $new->{again} = $_[0]; |
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| 116 | } |
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| 117 | |
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| 118 | sub counter($) { |
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| 119 | $new->{again} = $_[0]; |
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| 120 | $bgdsl_self->{counter} + 0 |
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| 121 | } |
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| 122 | } |
287 | } |
| 123 | |
288 | |
| 124 | sub parse_expr { |
289 | sub parse_expr { |
| 125 | my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
290 | my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
| 126 | die if $@; |
291 | die if $@; |
| … | |
… | |
| 137 | |
302 | |
| 138 | # evaluate the current bg expression |
303 | # evaluate the current bg expression |
| 139 | sub recalculate { |
304 | sub recalculate { |
| 140 | my ($self) = @_; |
305 | my ($self) = @_; |
| 141 | |
306 | |
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307 | # rate limit evaluation |
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308 | |
| 142 | if ($self->{next_refresh} > urxvt::NOW) { |
309 | if ($self->{next_refresh} > urxvt::NOW) { |
| 143 | $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub { |
310 | $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub { |
| 144 | $self->recalculate; |
311 | $self->recalculate; |
| 145 | }); |
312 | }); |
|
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313 | return; |
| 146 | } |
314 | } |
| 147 | |
315 | |
| 148 | $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
316 | $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
| 149 | |
317 | |
| 150 | #TODO: rate limit calls |
318 | # set environment to evaluate user expression |
| 151 | |
319 | |
| 152 | local $bgdsl_self = $self; |
320 | local $bgdsl_self = $self; |
| 153 | |
321 | |
| 154 | local $old = $self->{state}; |
322 | local $old = $self->{state}; |
| 155 | local $new = my $state = $self->{state} = {}; |
323 | local $new = my $state = $self->{state} = {}; |
| 156 | |
324 | |
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325 | my $border = 0; #d# |
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326 | |
| 157 | ($l, $t, $w, $h) = |
327 | ($x, $y, $w, $h) = |
| 158 | $self->get_geometry; |
328 | $self->background_geometry ($border); |
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329 | |
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330 | # evaluate user expression |
| 159 | |
331 | |
| 160 | my $img = eval { $self->{expr}->() }; |
332 | my $img = eval { $self->{expr}->() }; |
| 161 | warn $@ if $@;#d# |
333 | warn $@ if $@;#d# |
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334 | die if !UNIVERSAL::isa $img, "urxvt::img"; |
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335 | |
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336 | # if the expression is sensitive to external events, prepare reevaluation then |
| 162 | |
337 | |
| 163 | my $repeat; |
338 | my $repeat; |
| 164 | |
339 | |
| 165 | if (my $again = $state->{again}) { |
340 | if (my $again = $state->{again}) { |
| 166 | $repeat = 1; |
341 | $repeat = 1; |
| … | |
… | |
| 191 | $self->enable (rootpmap_change => sub { $_[0]->recalculate }); |
366 | $self->enable (rootpmap_change => sub { $_[0]->recalculate }); |
| 192 | } else { |
367 | } else { |
| 193 | $self->disable ("rootpmap_change"); |
368 | $self->disable ("rootpmap_change"); |
| 194 | } |
369 | } |
| 195 | |
370 | |
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371 | # clear stuff we no longer need |
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372 | |
| 196 | %$old = (); |
373 | %$old = (); |
| 197 | |
374 | |
| 198 | unless ($repeat) { |
375 | unless ($repeat) { |
| 199 | delete $self->{state}; |
376 | delete $self->{state}; |
| 200 | delete $self->{expr}; |
377 | delete $self->{expr}; |
| 201 | } |
378 | } |
| 202 | |
379 | |
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380 | # prepare and set background pixmap |
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381 | |
| 203 | $img = $img->sub_rect (0, 0, $w, $h) |
382 | $img = $img->sub_rect (0, 0, $w, $h) |
| 204 | if $img->w != $w || $img->h != $h; |
383 | if $img->w != $w || $img->h != $h; |
| 205 | |
384 | |
| 206 | $self->set_background ($img); |
385 | $self->set_background ($img, $border); |
| 207 | $self->scr_recolour (0); |
386 | $self->scr_recolour (0); |
| 208 | $self->want_refresh; |
387 | $self->want_refresh; |
| 209 | } |
388 | } |
| 210 | |
389 | |
| 211 | sub on_start { |
390 | sub on_start { |
