done

fragment.glsl

@@ -1,9 +1,4 @@
-#version 320 es
+#version 330 core
-
-precision highp float;
-precision highp int;
-precision lowp sampler2D;
-precision lowp samplerCube;
 
 uniform vec2 WindowSize;
 uniform float time;

pulsating-noise.glsl

@@ -1,7 +1,7 @@
 #version 330 core
-out vec4 FragColor;
 uniform vec2 WindowSize;
 uniform float time;
+layout(location = 0) out vec4 color;
 
 float rand(vec2 co){
     return fract(sin(dot(co, vec2(12.9898, 78.233))) * 43758.5453);
@@ -13,5 +13,5 @@ void main() {
     vec2 uv = gl_FragCoord.xy / WindowSize;
     // grid
     float glob = rand(uv + time);
-    FragColor = vec4(glob * (sin(time)/2 + 0.5), glob, 1.0, 1.0); //vec4(gl_FragCoord.xy / WindowSize, 0.0, 1.0);
+    color = vec4(glob * (sin(time)/2 + 0.5), glob, 1.0, 1.0); //vec4(gl_FragCoord.xy / WindowSize, 0.0, 1.0);
 }

renderer.c

@@ -28,7 +28,7 @@ GLuint compile_shader(GLuint type, const char *src) {
 }
 
 const char *vertex_shader_src =
-"#version 320 es\n"
+"#version 330 core\n"
 "\n"
 "layout(location = 0) in vec2 aPos;\n"
 "\n"
@@ -158,7 +158,7 @@ void render(Renderer *state, int w, int h, double time, char *shader_path, int r
     // Rendorrrr
     glViewport(0, 0, w, h);
 
-    glClearColor(0.3f, 0.3f, 0.3f, 1.0f);  // Dark gray background
+    glClearColor(0.8f, 0.3f, 0.3f, 1.0f);  // Dark gray background
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
     // Shader parameters.

wayland.c

@@ -365,13 +365,17 @@ static void egl_init(struct client_state *state) {
         EGL_RED_SIZE, 8,
         EGL_GREEN_SIZE, 8,
         EGL_BLUE_SIZE, 8,
-        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT | EGL_OPENGL_ES3_BIT | EGL_OPENGL_BIT,
         EGL_MIN_SWAP_INTERVAL, 0,  // make sure that swapping buffers don't block the thread
         EGL_NONE
     };
 
     static const EGLint context_attribs[] = {
-        EGL_CONTEXT_CLIENT_VERSION, 2,
+        //EGL_CONTEXT_CLIENT_VERSION, 2,
+        EGL_CONTEXT_MAJOR_VERSION, 4,
+        EGL_CONTEXT_MINOR_VERSION, 6,
+        EGL_CONTEXT_OPENGL_PROFILE_MASK,
+            EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
         EGL_NONE
     };
     
@@ -391,11 +395,16 @@ static void egl_init(struct client_state *state) {
     }
     printf("EGL major: %d, minor %d\n", major, minor);
 
+    // Desktop GL?
+    if (eglBindAPI(EGL_OPENGL_API) == EGL_FALSE) {
+        printf("eglBindAPI failed\n");
+        exit(1);
+    }
+
     EGLint count;
     eglGetConfigs(state->egl_display, NULL, 0, &count);
     printf("EGL has %d configs\n", count);
 
-
     EGLConfig *configs = calloc(count, sizeof *configs);
     
     EGLint n;
@@ -415,13 +424,14 @@ static void egl_init(struct client_state *state) {
         break;
     }
 
-    // Desktop GL?
-    eglBindAPI(EGL_OPENGL_API);
-
     state->egl_context =
     eglCreateContext(state->egl_display,
              state->egl_config,
              EGL_NO_CONTEXT, context_attribs);
+    if (state->egl_context == EGL_NO_CONTEXT) {
+        printf("Failed to create EGL context\n");
+        exit(1);
+    }
 
     // EGL window
     struct surface_list *next = state->surface_list;