Move common shader data to uniform buffer

shaders/frag.glsl

@@ -45,7 +45,12 @@ uniform Material material;
 uniform DirLight directional_light;
 uniform PointLight point_lights[POINT_LIGHT_COUNT];
 uniform SpotLight spot_light;
-uniform vec3 camera_position;
+
+layout (std140) uniform Common {
+  mat4 projection;
+  mat4 view;
+  vec3 camera_position;
+};
 
 vec3 calc_dir_light(DirLight light, vec3 normal, vec3 view_direction);
 vec3 calc_point_light(PointLight light, vec3 normal, vec3 frag_position, vec3 view_direction);

shaders/reflective_frag.glsl

@@ -6,9 +6,14 @@ in VS_OUT {
   vec2 uv_coords;
 } fs_in;
 
-uniform vec3 camera_position;
 uniform samplerCube cubemap;
 
+layout (std140) uniform Common {
+  mat4 projection;
+  mat4 view;
+  vec3 camera_position;
+};
+
 out vec4 color;
 
 void main() {

shaders/refractive_frag.glsl

@@ -9,9 +9,14 @@ in VS_OUT {
   vec2 uv_coords;
 } fs_in;
 
-uniform vec3 camera_position;
 uniform samplerCube cubemap;
 
+layout (std140) uniform Common {
+  mat4 projection;
+  mat4 view;
+  vec3 camera_position;
+};
+
 out vec4 color;
 
 void main() {

shaders/sb_vert.glsl

@@ -4,13 +4,18 @@ layout(location=0) in vec3 position;
 layout(location=1) in vec3 normal;
 layout(location=2) in vec2 uv;
 
-uniform mat4 view;
-uniform mat4 projection;
+uniform mat4 sb_view;
+
+layout (std140) uniform Common {
+  mat4 projection;
+  mat4 view;
+  vec3 camera_position;
+};
 
 out vec3 uv_coords;
 
 void main() {
-  vec4 pos    = projection * view * vec4(position, 1.0);
+  vec4 pos    = projection * sb_view * vec4(position, 1.0);
   gl_Position = pos.xyww;
   uv_coords   = position;
 }

shaders/vert.glsl

@@ -6,8 +6,12 @@ layout(location=2) in vec2 uv;
 
 uniform mat3 normal_mat;
 uniform mat4 model;
-uniform mat4 view;
-uniform mat4 projection;
+
+layout (std140) uniform Common {
+  mat4 projection;
+  mat4 view;
+  vec3 camera_position;
+};
 
 // interface block
 out VS_OUT {