Added backgdrop, object and more text to text overlay example

data/shaders/textoverlay/background.frag

@@ -0,0 +1,15 @@
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (binding = 1) uniform sampler2D samplerColorMap;
+
+layout (location = 0) in vec2 inUV;
+
+layout (location = 0) out vec4 outFragColor;
+
+void main() 
+{
+	outFragColor = texture(samplerColorMap, inUV);	
+}

data/shaders/textoverlay/background.vert

@@ -0,0 +1,17 @@
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (location = 0) out vec2 outUV;
+
+out gl_PerVertex 
+{
+    vec4 gl_Position;   
+};
+
+void main() 
+{
+	outUV = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+	gl_Position = vec4(outUV * vec2(2.0f, 2.0f) + vec2(-1.0f, -1.0f), 0.0f, 1.0f);
+}

data/shaders/textoverlay/generate-spirv.bat

@@ -2,3 +2,5 @@ glslangvalidator -V text.vert -o text.vert.spv
 glslangvalidator -V text.frag -o text.frag.spv
 glslangvalidator -V mesh.vert -o mesh.vert.spv
 glslangvalidator -V mesh.frag -o mesh.frag.spv
+glslangvalidator -V background.vert -o background.vert.spv
+glslangvalidator -V background.frag -o background.frag.spv

data/shaders/textoverlay/mesh.frag

@@ -6,24 +6,22 @@
 layout (binding = 1) uniform sampler2D samplerColorMap;
 
 layout (location = 0) in vec3 inNormal;
-layout (location = 1) in vec3 inColor;
-layout (location = 2) in vec2 inUV;
-layout (location = 3) in vec3 inViewVec;
-layout (location = 4) in vec3 inLightVec;
+layout (location = 1) in vec2 inUV;
+layout (location = 2) in vec3 inViewVec;
+layout (location = 3) in vec3 inLightVec;
+layout (location = 4) in vec3 inEyeNormal;
 
 layout (location = 0) out vec4 outFragColor;
 
 void main() 
 {
-	vec4 color = texture(samplerColorMap, inUV) * vec4(inColor, 1.0);
+	vec4 color = texture(samplerColorMap, inUV);
 
 	vec3 N = normalize(inNormal);
 	vec3 L = normalize(inLightVec);
 	vec3 V = normalize(inViewVec);
 	vec3 R = reflect(-L, N);
-	vec3 diffuse = max(dot(N, L), 0.0) * inColor;
-	vec3 specular = pow(max(dot(R, V), 0.0), 16.0) * vec3(0.75);
-	outFragColor = vec4(diffuse * color.rgb + specular, 1.0);	
-	
-	outFragColor.rgb = vec3(diffuse + specular);
+	vec3 diffuse = max(dot(N, L), 0.0) * color.rgb;
+	vec3 specular = pow(max(dot(R, V), 0.0), 1.0) * vec3(color.a);
+	outFragColor = vec4(diffuse + specular, 1.0);	
 }

data/shaders/textoverlay/mesh.vert

@@ -6,7 +6,6 @@
 layout (location = 0) in vec3 inPos;
 layout (location = 1) in vec3 inNormal;
 layout (location = 2) in vec2 inUV;
-layout (location = 3) in vec3 inColor;
 
 layout (binding = 0) uniform UBO 
 {
@@ -16,10 +15,9 @@ layout (binding = 0) uniform UBO
 } ubo;
 
 layout (location = 0) out vec3 outNormal;
-layout (location = 1) out vec3 outColor;
-layout (location = 2) out vec2 outUV;
-layout (location = 3) out vec3 outViewVec;
-layout (location = 4) out vec3 outLightVec;
+layout (location = 1) out vec2 outUV;
+layout (location = 2) out vec3 outViewVec;
+layout (location = 3) out vec3 outLightVec;
 
 out gl_PerVertex 
 {
@@ -29,13 +27,12 @@ out gl_PerVertex
 void main() 
 {
 	outNormal = inNormal;
-	outColor = inColor;
 	outUV = inUV;
 	gl_Position = ubo.projection * ubo.model * vec4(inPos.xyz, 1.0);
 	
     vec4 pos = ubo.model * vec4(inPos, 1.0);
-    outNormal = /*mat3(ubo.model) */ inNormal;
-	vec3 lPos = /*mat3(ubo.model) */ ubo.lightPos.xyz;
+    outNormal = mat3(transpose(inverse(ubo.model))) * normalize(inNormal);
+	vec3 lPos = mat3(ubo.model) * ubo.lightPos.xyz;
     outLightVec = lPos - pos.xyz;
-    outViewVec = -pos.xyz;		
+    outViewVec = -pos.xyz;			
 }