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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:23:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:23:22 +0000 |
commit | e42129241681dde7adae7d20697e7b421682fbb4 (patch) | |
tree | af1fe815a5e639e68e59fabd8395ec69458b3e5e /plug-ins/script-fu/scripts/perspective-shadow.scm | |
parent | Initial commit. (diff) | |
download | gimp-e42129241681dde7adae7d20697e7b421682fbb4.tar.xz gimp-e42129241681dde7adae7d20697e7b421682fbb4.zip |
Adding upstream version 2.10.22.upstream/2.10.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plug-ins/script-fu/scripts/perspective-shadow.scm')
-rw-r--r-- | plug-ins/script-fu/scripts/perspective-shadow.scm | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/plug-ins/script-fu/scripts/perspective-shadow.scm b/plug-ins/script-fu/scripts/perspective-shadow.scm new file mode 100644 index 0000000..1eb40e3 --- /dev/null +++ b/plug-ins/script-fu/scripts/perspective-shadow.scm @@ -0,0 +1,217 @@ +; GIMP - The GNU Image Manipulation Program +; Copyright (C) 1995 Spencer Kimball and Peter Mattis +; +; This program is free software: you can redistribute it and/or modify +; it under the terms of the GNU General Public License as published by +; the Free Software Foundation; either version 3 of the License, or +; (at your option) any later version. +; +; This program is distributed in the hope that it will be useful, +; but WITHOUT ANY WARRANTY; without even the implied warranty of +; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +; GNU General Public License for more details. +; +; You should have received a copy of the GNU General Public License +; along with this program. If not, see <https://www.gnu.org/licenses/>. +; +; +; perspective-shadow.scm version 1.2 2000/11/08 +; +; Copyright (C) 1997-2000 Sven Neumann <sven@gimp.org> +; +; +; Adds a perspective shadow of the current selection or alpha-channel +; as a layer below the active layer +; + +(define (script-fu-perspective-shadow image + drawable + alpha + rel-distance + rel-length + shadow-blur + shadow-color + shadow-opacity + interpolation + allow-resize) + (let* ( + (shadow-blur (max shadow-blur 0)) + (shadow-opacity (min shadow-opacity 100)) + (shadow-opacity (max shadow-opacity 0)) + (rel-length (abs rel-length)) + (alpha (* (/ alpha 180) *pi*)) + (type (car (gimp-drawable-type-with-alpha drawable))) + (image-width (car (gimp-image-width image))) + (image-height (car (gimp-image-height image))) + (from-selection 0) + (active-selection 0) + (shadow-layer 0) + ) + + (gimp-context-push) + (gimp-context-set-defaults) + + (if (> rel-distance 24) (set! rel-distance 999999)) + (if (= rel-distance rel-length) (set! rel-distance (+ rel-distance 0.01))) + + (gimp-image-undo-group-start image) + + (gimp-layer-add-alpha drawable) + (if (= (car (gimp-selection-is-empty image)) TRUE) + (begin + (gimp-image-select-item image CHANNEL-OP-REPLACE drawable) + (set! from-selection FALSE)) + (begin + (set! from-selection TRUE) + (set! active-selection (car (gimp-selection-save image))))) + + (let* ((selection-bounds (gimp-selection-bounds image)) + (select-offset-x (cadr selection-bounds)) + (select-offset-y (caddr selection-bounds)) + (select-width (- (cadr (cddr selection-bounds)) select-offset-x)) + (select-height (- (caddr (cddr selection-bounds)) select-offset-y)) + + (abs-length (* rel-length select-height)) + (abs-distance (* rel-distance select-height)) + (half-bottom-width (/ select-width 2)) + (half-top-width (* half-bottom-width + (/ (- rel-distance rel-length) rel-distance))) + + (x0 (+ select-offset-x (+ (- half-bottom-width half-top-width) + (* (cos alpha) abs-length)))) + (y0 (+ select-offset-y (- select-height + (* (sin alpha) abs-length)))) + (x1 (+ x0 (* 2 half-top-width))) + (y1 y0) + (x2 select-offset-x) + (y2 (+ select-offset-y select-height)) + (x3 (+ x2 select-width)) + (y3 y2) + + (shadow-width (+ (- (max x1 x3) (min x0 x2)) (* 2 shadow-blur))) + (shadow-height (+ (- (max y1 y3) (min y0 y2)) (* 2 shadow-blur))) + (shadow-offset-x (- (min x0 x2) shadow-blur)) + (shadow-offset-y (- (min y0 y2) shadow-blur))) + + + (set! shadow-layer (car (gimp-layer-new image + select-width + select-height + type + "Perspective Shadow" + shadow-opacity + LAYER-MODE-NORMAL))) + + + (gimp-image-insert-layer image shadow-layer 0 -1) + (gimp-layer-set-offsets shadow-layer select-offset-x select-offset-y) + (gimp-drawable-fill shadow-layer FILL-TRANSPARENT) + (gimp-context-set-background shadow-color) + (gimp-drawable-edit-fill shadow-layer FILL-BACKGROUND) + (gimp-selection-none image) + + (if (= allow-resize TRUE) + (let* ((new-image-width image-width) + (new-image-height image-height) + (image-offset-x 0) + (image-offset-y 0)) + + (if (< shadow-offset-x 0) + (begin + (set! image-offset-x (abs shadow-offset-x)) + (set! new-image-width (+ new-image-width image-offset-x)) + ; adjust to new coordinate system + (set! x0 (+ x0 image-offset-x)) + (set! x1 (+ x1 image-offset-x)) + (set! x2 (+ x2 image-offset-x)) + (set! x3 (+ x3 image-offset-x)) + )) + + (if (< shadow-offset-y 0) + (begin + (set! image-offset-y (abs shadow-offset-y)) + (set! new-image-height (+ new-image-height image-offset-y)) + ; adjust to new coordinate system + (set! y0 (+ y0 image-offset-y)) + (set! y1 (+ y1 image-offset-y)) + (set! y2 (+ y2 image-offset-y)) + (set! y3 (+ y3 image-offset-y)) + )) + + (if (> (+ shadow-width shadow-offset-x) new-image-width) + (set! new-image-width (+ shadow-width shadow-offset-x))) + + (if (> (+ shadow-height shadow-offset-y) new-image-height) + (set! new-image-height (+ shadow-height shadow-offset-y))) + (gimp-image-resize image + new-image-width + new-image-height + image-offset-x + image-offset-y))) + + (gimp-context-set-transform-direction TRANSFORM-FORWARD) + (gimp-context-set-interpolation interpolation) + (gimp-context-set-transform-recursion 3) + (gimp-context-set-transform-resize TRANSFORM-RESIZE-ADJUST) + + (gimp-item-transform-perspective shadow-layer + x0 y0 + x1 y1 + x2 y2 + x3 y3) + + (if (>= shadow-blur 1.0) + (begin + (gimp-layer-set-lock-alpha shadow-layer FALSE) + (gimp-layer-resize shadow-layer + shadow-width + shadow-height + shadow-blur + shadow-blur) + (plug-in-gauss-rle RUN-NONINTERACTIVE + image + shadow-layer + shadow-blur + TRUE + TRUE)))) + + (if (= from-selection TRUE) + (begin + (gimp-image-select-item image CHANNEL-OP-REPLACE active-selection) + (gimp-drawable-edit-clear shadow-layer) + (gimp-image-remove-channel image active-selection))) + + (if (and + (= (car (gimp-layer-is-floating-sel drawable)) 0) + (= from-selection FALSE)) + (gimp-image-raise-item image drawable)) + + (gimp-image-set-active-layer image drawable) + (gimp-image-undo-group-end image) + (gimp-displays-flush) + + (gimp-context-pop) + ) +) + +(script-fu-register "script-fu-perspective-shadow" + _"_Perspective..." + _"Add a perspective shadow to the selected region (or alpha)" + "Sven Neumann <sven@gimp.org>" + "Sven Neumann" + "2000/11/08" + "RGB* GRAY*" + SF-IMAGE "Image" 0 + SF-DRAWABLE "Drawable" 0 + SF-ADJUSTMENT _"Angle" '(45 0 180 1 10 1 0) + SF-ADJUSTMENT _"Relative distance of horizon" '(5 0.1 24.1 0.1 1 1 1) + SF-ADJUSTMENT _"Relative length of shadow" '(1 0.1 24 0.1 1 1 1) + SF-ADJUSTMENT _"Blur radius" '(3 0 1024 1 10 0 0) + SF-COLOR _"Color" '(0 0 0) + SF-ADJUSTMENT _"Opacity" '(80 0 100 1 10 0 0) + SF-ENUM _"Interpolation" '("InterpolationType" "linear") + SF-TOGGLE _"Allow resizing" FALSE +) + +(script-fu-menu-register "script-fu-perspective-shadow" + "<Image>/Filters/Light and Shadow/Shadow") |