MultiSampleAntiAliasing QML Type

Enable multisample antialiasing. More...

• List of all members, including inherited members

Detailed Description

A MultiSampleAntiAliasing type enables multisample antialiasing.

It can be added to a RenderPass:

 RenderPass {
     shaderProgram: ShaderProgram {
         // ...
     }
     renderStates: [
         MultiSampleAntiAliasing {}
     ]
 }

Or a RenderStateSet:

 RenderStateSet {
     renderStates: [
         MultiSampleAntiAliasing {}
     ]
 }

For multisampling to take effect, the render target must have been allocated with multisampling enabled:

 RenderTarget {
     attachments: [
         RenderTargetOutput {
             attachmentPoint: RenderTargetOutput.Color0
             texture: Texture2DMultisample {
                 width: 1024
                 height: 1024
                 format: Texture.RGBA8_UNorm
             }
         },
         RenderTargetOutput {
             attachmentPoint: RenderTargetOutput.DepthStencil
             texture: Texture2DMultisample{
                 width: 1024
                 height: 1024
                 format: Texture.D24S8
             }
         }
     ]
 }

Further, the shader code must use multisampling sampler types and texelFetch() instead of texture().

Further, the shader code must use multisampling sampler types and texelFetch() instead of texture().

For example, if you have code like

 #version 150

 uniform sampler2D colorTexture;
 in vec2 texCoord;
 out vec4 fragColor;

 void main()
 {
     fragColor = texture(colorTexture, texCoord);
 }

you can rewrite it as

 #version 150

 uniform sampler2DMS colorTexture;
 in vec2 texCoord;
 out vec4 fragColor;

 void main()
 {
     ivec2 tc = ivec2(floor(textureSize(colorTexture) * texCoord));
     vec4 c = texelFetch(colorTexture, tc, 0) +
                 texelFetch(colorTexture, tc, 1) +
                 texelFetch(colorTexture, tc, 2) +
                 texelFetch(colorTexture, tc, 3);
     fragColor = c / 4.0;
 }