Moved gen_images.py to tools

Author: ducalex

BUILDING.md

@@ -80,7 +80,7 @@ or even do nothing at all. In such cases you should use `python rg_tool.py ...`
 
 
 ## Changing the launcher's images
-All images used by the launcher (headers, logos) are located in `launcher/main/images`. If you edit them you must run the `launcher/main/gen_images.py` script to regenerate `images.c`. Magenta (rgb(255, 0, 255) / 0xF81F) is used as the transparency color.
+All images used by the launcher (headers, logos) are located in `launcher/main/images`. If you edit them you must run the `tools/gen_images.py` script to regenerate `launcher/main/images.c`. Refer to [THEMING.md](THEMING.md) for details about the image format.
 
 
 ## Updating translations

THEMING.md

@@ -27,8 +27,6 @@ A theme is a folder placed in `sd:/retro-go/themes` containing the following fil
 | banner_X.png | PNG 272x24 | Launcher banners where X is the name of the launcher tab | No |
 | logo_X.png | PNG 46x50 | Launcher logos where X is the name of the launcher tab | No |
 
-It is highly recommended to keep the image files sizes as small as possible to ensure good loading speed. This can be achieved by using the lowest bit depth possible when saving your PNG file. Tools like [pngquant](https://pngquant.org/) can also help!
-
 
 ### theme.json
 
@@ -93,3 +91,10 @@ Colors are RGB565 and can be represented as integers or hex strings. The special
 ````
 
 Important: If retro-go refuses to load your theme, please run your theme.json through a JSON validator to make sure the format is correct (JSON is quite strict regarding quotes or trailing commas for example).
+
+
+### Images
+
+It is highly recommended to keep the image files sizes as small as possible to ensure good loading speed. This can be achieved by using the lowest bit depth possible when saving your PNG file. Tools like [pngquant](https://pngquant.org/) can also help!
+
+Magenta (rgb(255, 0, 255) / 0xF81F) is used as the transparency color in some situations.

themes/default/es-theme-gbz35-master.zip themes/default/source/es-theme-gbz35-master.zip

@@ -2,12 +2,12 @@
 
 # This scripts should be run to update images.c when you edit images
 
-os.chdir(sys.path[0])
+# os.chdir(sys.path[0])
 
 output = '#include "gui.h"\n\n'
 refs = ""
 
-for file in sorted(glob.glob("images/*.png")):
+for file in sorted(glob.glob("launcher/main/images/*.png")):
     with open(file, "rb") as f:
         data = f.read()
         size = len(data)
@@ -26,5 +26,5 @@
 
 output += "\nconst binfile_t *builtin_images[] = {%s\n0\n};\n" % refs
 
-with open("images.c", "w", newline="") as f:
+with open("launcher/main/images.c", "w", newline="") as f:
     f.write(output)