backgorund image change and change function display color

4 files changed, 18 insertions, 5 deletions

diff --git a/blog/views.py b/blog/views.py
index 26d75e69..e1113016 100644
--- a/blog/views.py
+++ b/blog/views.py
@@ -12,6 +12,8 @@ import json
 from .models import Post, Comment
 from .context_processors import recent_posts
 from announcements.models import Announcement
+from PIL import Image
+from io import BytesIO
 
 # Create your views here.
 
@@ -178,6 +180,15 @@ def tex(request):
 
     import requests
 
-    image = requests.get('https://latex.codecogs.com/png.image?%5Cinline%20%5Clarge%20%5Cdpi%7B300%7D%5Cbg%7Bblack%7D' + expression).content
+    image = requests.get('https://latex.codecogs.com/png.image?%5Cinline%20%5Clarge%20%5Cdpi%7B300%7D%5Cbg%7Btransparent%7D' + expression).content
 
-    return HttpResponse(image, content_type='image/png')
+    # Image is a transparent GIF with black text. Invert the colors.
+    image = Image.open(BytesIO(image))
+    image = image.convert('RGB')
+    image = Image.eval(image, lambda x: 255 - x)
+    image = image.convert('RGBA')
+
+    # Convert back to gif and return
+    output = BytesIO()
+    image.save(output, format='GIF')
+    return HttpResponse(output.getvalue(), content_type='image/gif')
diff --git a/requirements.txt b/requirements.txt
index efee8138..47cbb152 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,5 @@ six==1.16.0
 cryptocode==0.1
 captcha==0.4
 PyGithub==1.55
-requests==2.28.1
\ No newline at end of file
+requests==2.28.1
+pillow==9.2.0
\ No newline at end of file
diff --git a/static/css/main.css b/static/css/main.css
index 412b2358..ba0c9d16 100644
--- a/static/css/main.css
+++ b/static/css/main.css
@@ -1,8 +1,9 @@
 body {
-    background-image: url("../images/site/bg.gif");
-    background-repeat: repeat;
+    background-image: url("../images/site/backgound.jpeg");
+    background-repeat: no-repeat;
     background-attachment: fixed;
     background-position: center;
+    background-size: cover;
     font-family: 'Times New Roman', Times, serif;
     padding: 0;
     margin: 0;
diff --git a/static/images/site/backgound.jpeg b/static/images/site/backgound.jpeg
new file mode 100644
index 00000000..90281bd8
--- /dev/null
+++ b/static/images/site/backgound.jpeg