Add Offscreen Framebuffer support

Vulkan/res/shaders/passthrough.frag

@@ -0,0 +1,11 @@
+#version 450
+
+layout(set = 0, binding = 0) uniform sampler2D texSampler;
+layout(location = 0) in vec2 fragTexCoord;
+
+layout(location = 0) out vec4 outColor;
+
+void main()
+{
+  outColor = texture(texSampler, fragTexCoord);
+}

Vulkan/res/shaders/passthrough.vert

@@ -0,0 +1,11 @@
+#version 450
+
+layout(location = 0) in vec2 inPosition;
+
+layout(location = 0) out vec2 fragTexCoord;
+
+void main()
+{
+  gl_Position = vec4(inPosition* 0.5, 0.999, 1.0);
+  fragTexCoord = inPosition * 0.5 + 0.5;
+}

Vulkan/res/shaders/shader.frag

@@ -10,6 +10,6 @@ layout(location = 3) in vec3 fragLightPos;
 layout(location = 0) out vec4 outColor;
 
 void main() {
-    float scale = 0.45 +  max(dot(vec3(0, 1, 0), normalize(fragLightPos - fragPosition)), 0.0);
-    outColor = vec4(fragColor, 1.0) * texture(texSampler, fragTexCoord) * scale;
+  float scale = 0.45 +  max(dot(vec3(0, 1, 0), normalize(fragLightPos - fragPosition)), 0.0);
+  outColor = vec4(fragColor, 1.0) * texture(texSampler, fragTexCoord) * scale;
 }

Vulkan/res/shaders/shader.vert

@@ -2,10 +2,10 @@
 
 layout(set = 0, binding = 0) uniform SceneUniformBufferObject
 {
-	mat4 projection;
-	mat4 view;
-	mat4 model;
-	vec3 lightPos;
+  mat4 projection;
+  mat4 view;
+  mat4 model;
+  vec3 lightPos;
 } ubo;
 
 layout(location = 0) in vec3 inPosition;
@@ -18,9 +18,9 @@ layout(location = 2) out vec3 fragPosition;
 layout(location = 3) out vec3 fragLightPos;
 
 void main() {
-    gl_Position = ubo.projection * ubo.view * ubo.model * vec4(inPosition, 1.0);
-    fragColor = inColor;
-	fragTexCoord = inTexCoord;
-    fragPosition =	vec3(ubo.model * vec4(inPosition, 1.0));
-	fragLightPos = ubo.lightPos;
+  gl_Position = ubo.projection * ubo.view * ubo.model * vec4(inPosition, 1.0);
+  fragColor = inColor;
+  fragTexCoord = inTexCoord;
+  fragPosition =  vec3(ubo.model * vec4(inPosition, 1.0));
+  fragLightPos = ubo.lightPos;
 }