RenderPass QML Type

Encapsulates a Render Pass. More...

• List of all members, including inherited members

Properties

• filterKeys : list<FilterKey>
• parameters : list<Parameter>
• renderStates : list<RenderState>
• shaderProgram : ShaderProgram

Detailed Description

A RenderPass specifies a single rendering pass - an instance of shader program execution - used by Technique. A Render pass consists of a ShaderProgram and a list of FilterKey objects, a list of RenderState objects and a list of Parameter objects.

RenderPass executes the ShaderProgram using the given RenderState and Parameter nodes when at least one of FilterKey nodes being referenced matches any of the FilterKey nodes in RenderPassFilter or when no RenderPassFilter is present in the FrameGraph.

If the RenderPass defines a Parameter, it will be overridden by a Parameter with the same name if it exists in any of the Technique, Effect, Material, TechniqueFilter, RenderPassFilter associated with the pass at runtime. This still can be useful to define sane default values.

At render time, for each leaf node of the FrameGraph a base render state is recorded by accumulating states defined by all RenderStateSet nodes in the FrameGraph branch. Each RenderPass can overload this base render state by specifying its own RenderState nodes.

 Technique {
     filterKeys: [
         FilterKey { name: "renderingStyle"; value: "forward" }
     ]
     graphicsApiFilter: {
         api: GraphicsApiFilter.OpenGL
         profile: GraphicsApiFilter.CoreProfile
         majorVersion: 3
         minorVersion: 1
     }
     renderPasses: [
         RenderPass {
             id: pass
             shaderProgram: ShaderProgram {
                 // ...
             }
             parameters: [
                 Parameter { name: "color"; value: "red" }
             ]
             renderStates: [
                 DepthTest {}
             ]
         }
     ]
 }

See also RenderPassFilter, FilterKey, Parameter, RenderState, Effect, and Technique.

Property Documentation