| 1 | #! perl |
1 | #! perl |
| 2 | |
2 | |
| 3 | our $EXPR = 'resize (blur (load "/root/pix/das_fette_schwein.jpg", 1 + (counter 1) % 10, 10), w, h)'; |
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 | $EXPR = 'move -TX, -TY, load "argb.png"'; |
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10 | #$EXPR = ' |
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11 | # rotate W, H, 50, 50, counter 1/59.95, repeat_mirror, |
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12 | # clip X, Y, W, H, repeat_mirror, |
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13 | # load "/root/pix/das_fette_schwein.jpg" |
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14 | #'; |
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15 | #$EXPR = 'solid "red"'; |
| 4 | #$EXPR = 'blur root, 10, 10' |
16 | #$EXPR = 'blur root, 10, 10' |
| 5 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
17 | #$EXPR = 'blur move (root, -x, -y), 5, 5' |
| 6 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
18 | #resize load "/root/pix/das_fette_schwein.jpg", w, h |
| 7 | |
19 | |
| 8 | use Safe; |
20 | use Safe; |
| 9 | |
21 | |
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22 | our ($bgdsl_self, $old, $new); |
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23 | our ($x, $y, $w, $h); |
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24 | |
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25 | # enforce at least this interval between updates |
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26 | our $MIN_INTERVAL = 1/100; |
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27 | |
| 10 | { |
28 | { |
| 11 | package urxvt::bgdsl::vars; |
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| 12 | |
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| 13 | our ($self, $old, $new); |
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| 14 | our ($x, $y, $w, $h); |
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| 15 | |
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| 16 | package urxvt::bgdsl; # background language |
29 | package urxvt::bgdsl; # background language |
| 17 | |
30 | |
| 18 | *repeat_black = \&urxvt::RepeatNone; #TODO wtf |
31 | =head2 PROVIDERS/GENERATORS |
| 19 | *repeat_wrap = \&urxvt::RepeatNormal; |
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| 20 | *repeat_pad = \&urxvt::RepeatPad; |
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| 21 | *repeat_mirror = \&urxvt::RepeatReflect; |
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| 22 | |
32 | |
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33 | =over 4 |
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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 |
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43 | |
| 23 | sub load { |
44 | sub load($) { |
| 24 | my ($path) = @_; |
45 | my ($path) = @_; |
| 25 | |
46 | |
| 26 | $new->{load}{$path} = $old->{load}{$path} || $self->new_img_from_file ($path); |
47 | $new->{load}{$path} = $old->{load}{$path} || $bgdsl_self->new_img_from_file ($path); |
| 27 | } |
48 | } |
| 28 | |
49 | |
| 29 | sub root { |
50 | sub root() { |
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51 | $new->{rootpmap_sensitive} = 1; |
| 30 | die "root op not supported, exg, we need you"; |
52 | die "root op not supported, exg, we need you"; |
| 31 | } |
53 | } |
| 32 | |
54 | |
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55 | sub solid($;$$) { |
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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 TX() { $new->{position_sensitive} = 1; $x } |
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70 | sub TY() { $new->{position_sensitive} = 1; $y } |
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71 | sub TW() { $new->{size_sensitive} = 1; $w } |
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72 | sub TH() { $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 | |
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160 | sub clone($) { |
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161 | $_[0]->clone |
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162 | } |
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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 | |
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187 | sub clip($;$$;$$) { |
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188 | my $img = pop; |
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189 | my $h = pop || TH; |
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190 | my $w = pop || TW; |
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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 (TW, TH) |
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222 | } |
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223 | |
| 33 | sub resize { |
224 | sub resize($$$) { |
| 34 | $_[0]->scale ($_[1], $_[2]) |
225 | my $img = pop; |
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226 | $img->scale ($_[0], $_[1]) |
| 35 | } |
227 | } |
| 36 | |
228 | |
| 37 | sub move { |
229 | sub move($$;$) { |
| 38 | # TODO: must be simpler |
230 | my $img = pop->clone; |
| 39 | $_[0]->transform ($_[0]->w, $_[0]->h, $_[1], |
231 | $img->move ($_[0], $_[1]); |
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232 | $img |
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233 | } |
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234 | |
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235 | sub rotate($$$$$$) { |
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236 | my $img = pop; |
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237 | $img->rotate ( |
| 40 | 1, 0, -$_[2], |
238 | $_[0], |
| 41 | 0, 1, -$_[3], |
239 | $_[1], |
| 42 | 0, 0, 1, |
240 | $_[2] * $img->w * .01, |
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241 | $_[3] * $img->h * .01, |
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242 | $_[4] * (3.14159265 / 180), |
| 43 | ) |
243 | ) |
| 44 | } |
244 | } |
| 45 | |
245 | |
| 46 | sub rotate { |
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| 47 | $_[0]->rotate ($_[0], $_[1], $_[2], $_[3] * (3.14159265 / 180)) |
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| 48 | } |
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| 49 | |
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| 50 | sub blur { |
246 | sub blur($$;$) { |
| 51 | my ($img, $rh, $rv) = @_; |
247 | my $img = pop; |
| 52 | |
248 | $img->blur ($_[0], @_ >= 2 ? $_[1] : $_[0]) |
| 53 | $img = $img->clone; |
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| 54 | $img->clone->blur ($rh, $rv); |
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| 55 | $img |
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| 56 | } |
249 | } |
| 57 | |
250 | |
| 58 | sub contrast { |
251 | sub contrast($$;$$;$) { |
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252 | my $img = pop; |
| 59 | my ($img, $r, $g, $b, $a) = @_; |
253 | my ($r, $g, $b, $a) = @_; |
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254 | |
| 60 | ($g, $b) = ($r, $r) if @_ < 4; |
255 | ($g, $b) = ($r, $r) if @_ < 4; |
| 61 | $a = 1 if @_ < 5; |
256 | $a = 1 if @_ < 5; |
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257 | |
| 62 | $img = $img->clone; |
258 | $img = $img->clone; |
| 63 | $img->contrast ($r, $g, $b, $a); |
259 | $img->contrast ($r, $g, $b, $a); |
| 64 | $img |
260 | $img |
| 65 | } |
261 | } |
| 66 | |
262 | |
| 67 | sub brightness { |
263 | sub brightness($$;$$;$) { |
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264 | my $img = pop; |
| 68 | my ($img, $r, $g, $b, $a) = @_; |
265 | my ($r, $g, $b, $a) = @_; |
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266 | |
| 69 | ($g, $b) = ($r, $r) if @_ < 4; |
267 | ($g, $b) = ($r, $r) if @_ < 4; |
| 70 | $a = 1 if @_ < 5; |
268 | $a = 1 if @_ < 5; |
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269 | |
| 71 | $img = $img->clone; |
270 | $img = $img->clone; |
| 72 | $img->brightness ($r, $g, $b, $a); |
271 | $img->brightness ($r, $g, $b, $a); |
| 73 | $img |
272 | $img |
| 74 | } |
273 | } |
| 75 | |
274 | |
| 76 | sub x { $new->{position_sensitive} = 1; $x } |
275 | =back |
| 77 | sub y { $new->{position_sensitive} = 1; $y } |
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| 78 | sub w { $new->{size_sensitive} = 1; $w } |
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| 79 | sub h { $new->{size_sensitive} = 1; $h } |
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| 80 | sub now { urxvt::NOW } |
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| 81 | |
276 | |
| 82 | sub again { |
277 | =cut |
| 83 | $new->{again} = $_[0]; |
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| 84 | } |
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| 85 | |
278 | |
| 86 | sub counter { |
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| 87 | $new->{again} = $_[0]; |
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| 88 | $self->{counter}++ + 0 |
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| 89 | } |
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| 90 | } |
279 | } |
| 91 | |
280 | |
| 92 | sub parse_expr { |
281 | sub parse_expr { |
| 93 | my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
282 | my $expr = eval "sub {\npackage urxvt::bgdsl;\n#line 0 'background expression'\n$_[0]\n}"; |
| 94 | die if $@; |
283 | die if $@; |
| … | |
… | |
| 97 | |
286 | |
| 98 | # compiles a parsed expression |
287 | # compiles a parsed expression |
| 99 | sub set_expr { |
288 | sub set_expr { |
| 100 | my ($self, $expr) = @_; |
289 | my ($self, $expr) = @_; |
| 101 | |
290 | |
| 102 | local $Data::Dumper::Deparse=1; use Data::Dumper; warn Dumper $expr;#d# |
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| 103 | $self->{expr} = $expr; |
291 | $self->{expr} = $expr; |
| 104 | $self->recalculate; |
292 | $self->recalculate; |
| 105 | } |
293 | } |
| 106 | |
294 | |
| 107 | # evaluate the current bg expression |
295 | # evaluate the current bg expression |
| 108 | sub recalculate { |
296 | sub recalculate { |
| 109 | my ($self) = @_; |
297 | my ($self) = @_; |
| 110 | |
298 | |
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299 | # rate limit evaluation |
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300 | |
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301 | if ($self->{next_refresh} > urxvt::NOW) { |
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302 | $self->{next_refresh_timer} = urxvt::timer->new->after ($self->{next_refresh} - urxvt::NOW)->cb (sub { |
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303 | $self->recalculate; |
|
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304 | }); |
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305 | return; |
|
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306 | } |
|
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307 | |
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308 | $self->{next_refresh} = urxvt::NOW + $MIN_INTERVAL; |
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309 | |
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310 | # set environment to evaluate user expression |
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311 | |
| 111 | local $urxvt::bgdsl::vars::self = $self; |
312 | local $bgdsl_self = $self; |
| 112 | |
313 | |
| 113 | local $urxvt::bgdsl::vars::old = $self->{state}; |
314 | local $old = $self->{state}; |
| 114 | local $urxvt::bgdsl::vars::new = my $state = $self->{state} = {}; |
315 | local $new = my $state = $self->{state} = {}; |
| 115 | |
316 | |
| 116 | ($urxvt::bgdsl::vars::x, $urxvt::bgdsl::vars::y, $urxvt::bgdsl::vars::w, $urxvt::bgdsl::vars::h) = |
317 | my $border = 0; #d# |
| 117 | $self->get_geometry; |
318 | |
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319 | ($x, $y, $w, $h) = |
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320 | $self->background_geometry ($border); |
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321 | |
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322 | # evaluate user expression |
| 118 | |
323 | |
| 119 | my $img = eval { $self->{expr}->() }; |
324 | my $img = eval { $self->{expr}->() }; |
| 120 | warn $@ if $@;#d# |
325 | warn $@ if $@;#d# |
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326 | die if !UNIVERSAL::isa $img, "urxvt::img"; |
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327 | |
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328 | # if the expression is sensitive to external events, prepare reevaluation then |
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329 | |
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330 | my $repeat; |
| 121 | |
331 | |
| 122 | if (my $again = $state->{again}) { |
332 | if (my $again = $state->{again}) { |
| 123 | warn $again;#d# |
333 | $repeat = 1; |
| 124 | $state->{again} = urxvt::timer->new->after ($again)->cb (sub { $self->recalculate }); |
334 | $state->{timer} = $again == $old->{again} |
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335 | ? $old->{timer} |
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336 | : urxvt::timer->new->after ($again)->interval ($again)->cb (sub { |
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337 | ++$self->{counter}; |
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338 | $self->recalculate |
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339 | }); |
| 125 | } |
340 | } |
| 126 | |
341 | |
| 127 | # TODO: install handlers for geometry changes &c |
342 | if (delete $state->{position_sensitive}) { |
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343 | $repeat = 1; |
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344 | $self->enable (position_change => sub { $_[0]->recalculate }); |
|
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345 | } else { |
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346 | $self->disable ("position_change"); |
|
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347 | } |
| 128 | |
348 | |
| 129 | warn $img; |
349 | if (delete $state->{size_sensitive}) { |
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350 | $repeat = 1; |
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351 | $self->enable (size_change => sub { $_[0]->recalculate }); |
|
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352 | } else { |
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353 | $self->disable ("size_change"); |
|
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354 | } |
|
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355 | |
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356 | if (delete $state->{rootpmap_sensitive}) { |
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357 | $repeat = 1; |
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358 | $self->enable (rootpmap_change => sub { $_[0]->recalculate }); |
|
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359 | } else { |
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360 | $self->disable ("rootpmap_change"); |
|
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361 | } |
|
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362 | |
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363 | # clear stuff we no longer need |
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364 | |
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365 | %$old = (); |
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366 | |
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367 | unless ($repeat) { |
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368 | delete $self->{state}; |
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369 | delete $self->{expr}; |
|
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370 | } |
|
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371 | |
|
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372 | # prepare and set background pixmap |
|
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373 | |
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374 | $img = $img->sub_rect (0, 0, $w, $h) |
|
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375 | if $img->w != $w || $img->h != $h; |
|
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376 | |
| 130 | $self->set_background ($img); |
377 | $self->set_background ($img, $border); |
| 131 | $self->scr_recolour (0); |
378 | $self->scr_recolour (0); |
| 132 | $self->want_refresh; |
379 | $self->want_refresh; |
| 133 | } |
380 | } |
| 134 | |
381 | |
| 135 | sub on_start { |
382 | sub on_start { |
