From 9388696eae95f6a936d3dca36b72041f150366e3 Mon Sep 17 00:00:00 2001
From: TangoCash <eric@loxat.de>
Date: Mon, 2 May 2016 22:07:30 +0200
Subject: [PATCH] adding scaling option to image widget

use scale parameter in percent for decrease or increase image size, e.g.
'scale 50' for half size, or 'scale 200' for double size.
---
 widget_image.c | 21 +++++++++++++++++++++
 widget_image.h |  1 +
 2 files changed, 22 insertions(+)

diff --git a/widget_image.c b/widget_image.c
index 8d997a9..19f472c 100644
--- a/widget_image.c
+++ b/widget_image.c
@@ -74,6 +74,7 @@ static void widget_image_render(const char *Name, WIDGET_IMAGE * Image)
     int x, y;
     int inverted;
     gdImagePtr gdImage;
+	int scale;
 
     /* clear bitmap */
     if (Image->bitmap) {
@@ -118,6 +119,23 @@ static void widget_image_render(const char *Name, WIDGET_IMAGE * Image)
 
     }
 
+	scale = P2N(&Image->scale);
+	/* Scale if needed */
+	if ((scale != 100) && scale > 1) {
+		gdImage = Image->gdImage;
+		gdImagePtr scaled_image;
+		int ox = gdImageSX(gdImage);
+		int oy = gdImageSY(gdImage);
+		int nx = ox*scale/100;
+		int ny = oy*scale/100;
+		scaled_image = gdImageCreateTrueColor(nx,ny);
+		gdImageSaveAlpha(scaled_image, 1);
+		gdImageFill(scaled_image, 0, 0, gdImageColorAllocateAlpha(scaled_image, 0, 0, 0, 127));
+		gdImageCopyResized(scaled_image,Image->gdImage,0,0,0,0,nx,ny,ox,oy);
+		gdImageDestroy(Image->gdImage);
+		Image->gdImage = scaled_image;	
+	}
+
     /* maybe resize bitmap */
     gdImage = Image->gdImage;
     if (gdImage->sx > Image->width) {
@@ -179,6 +197,7 @@ static void widget_image_update(void *Self)
 
 	/* evaluate properties */
 	property_eval(&Image->file);
+	property_eval(&Image->scale);
 	property_eval(&Image->update);
 	property_eval(&Image->reload);
 	property_eval(&Image->visible);
@@ -225,6 +244,7 @@ int widget_image_init(WIDGET * Self)
 
 	/* load properties */
 	property_load(section, "file", NULL, &Image->file);
+	property_load(section, "scale", "100", &Image->scale);
 	property_load(section, "update", "100", &Image->update);
 	property_load(section, "reload", "0", &Image->reload);
 	property_load(section, "visible", "1", &Image->visible);
@@ -267,6 +287,7 @@ int widget_image_quit(WIDGET * Self)
 		}
 		free(Image->bitmap);
 		property_free(&Image->file);
+		property_free(&Image->scale);
 		property_free(&Image->update);
 		property_free(&Image->reload);
 		property_free(&Image->visible);
diff --git a/widget_image.h b/widget_image.h
index ef4806a..3480504 100644
--- a/widget_image.h
+++ b/widget_image.h
@@ -37,6 +37,7 @@ typedef struct WIDGET_IMAGE {
     RGBA *bitmap;		/* image bitmap */
     int width, height;		/* size of the image */
     PROPERTY file;		/* image filename */
+	PROPERTY scale;		/* scale image in percent */
     PROPERTY update;		/* update interval */
     PROPERTY reload;		/* reload image on update? */
     PROPERTY visible;		/* image visible? */
-- 
2.39.5