lower opengl requirements from 3.30 core to 3.00 ES

2 files changed, 7 insertions, 2 deletions

diff --git a/renderer.py b/renderer.py
index ae4be12..3d157cb 100644
--- a/renderer.py
+++ b/renderer.py
@@ -36,7 +36,8 @@ class ImageRenderer:
     @staticmethod
     def _init_shader():
         vertex_src = """
-        #version 330 core
+        #version 300 es
+        precision mediump float;  // Precision for float variables (mandatory for ES)
         layout (location = 0) in vec2 aPos;      // Vertex position
         layout (location = 1) in vec2 aTexCoord; // Texture coordinates
         uniform mat4 uTransform;                 // Transformation matrix
@@ -48,7 +49,8 @@ class ImageRenderer:
         }
         """
         fragment_src = """
-        #version 330 core
+        #version 300 es
+        precision mediump float; // Precision for float variables (mandatory for ES)
         in vec2 TexCoord;           // Interpolated texture coordinates
         out vec4 FragColor;         // Final fragment color
         uniform sampler2D uTexture; // Texture sampler
@@ -96,6 +98,8 @@ class ImageRenderer:
         return vao
 
     def draw_image(self, tex, win_w, win_h, alpha):
+        if not tex.initialized:
+            return
         glUseProgram(self.shader)
         glBindVertexArray(self.vao)
         # FIXME check if tex.id is None
diff --git a/todo b/todo
index 0970123..cc1ebd1 100644
--- a/todo
+++ b/todo
@@ -1,2 +1,3 @@
 push current images data on new socket connection opening up
 decrease size of assets in memory
+support older opengl versions e.g. for running on older pi's