Changeset 69dccfe in opengl-game for shaders

Timestamp:

Aug 6, 2019, 7:01:45 PM (5 years ago)

Author:

Dmitry Portnoy <dmitry.portnoy@…>

Branches:

feature/imgui-sdl, master, points-test

Children:

5f3dba8

Parents:

bba12e7

Message:

Implement a translucent, fullscreen overlay that shows a loaded texture. This will later be used to show a UI rendered by SDL.

Location:

shaders

Files:

• shader.frag (modified) (1 diff)
• shader.vert (modified) (1 diff)

shaders/shader.frag

@@ -3 +3 @@
 
 layout(binding = 1) uniform sampler2D texSampler;
+layout(binding = 2) uniform sampler2D uiTexSampler;
 
 layout(location = 0) in vec3 fragColor;
 layout(location = 1) in vec2 fragTexCoord;
+layout(location = 2) flat in uint isOverlay;
 
 layout(location = 0) out vec4 outColor;
 
 void main() {
-   outColor = vec4(fragColor * texture(texSampler, fragTexCoord).rgb, 1.0);
+   if (isOverlay == 1) {
+      outColor = vec4(fragColor * texture(uiTexSampler, fragTexCoord).rgb, 0.3);
+   } else {
+      outColor = vec4(fragColor * texture(texSampler, fragTexCoord).rgb, 1.0);
+   }
 }

shaders/shader.vert

@@ -14 +14 @@
 layout(location = 0) out vec3 fragColor;
 layout(location = 1) out vec2 fragTexCoord;
+layout(location = 2) out uint isOverlay;
 
 void main() {
-   gl_Position = ubo.proj * ubo.view * ubo.model * vec4(inPosition, 1.0);
-   fragColor = inColor;
+   if (gl_VertexIndex < 8 ) {
+      gl_Position = ubo.proj * ubo.view * ubo.model * vec4(inPosition, 1.0);
+      fragColor = inColor;
+      isOverlay = 0;
+   } else {
+      gl_Position = vec4(inPosition, 1.0);
+      fragColor = vec3(0.0, 1.0, 1.0);
+      isOverlay = 1;
+   }
+
    fragTexCoord = inTexCoord;
 }