render ( render-set -- )
GPU-accelerated rendering » Rendering

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render-set

Vocabulary
gpu.render

Inputs

render-set

a render-set

Outputs
None

Word description
Submits a rendering job to the GPU. The values in the render-set tuple describe the job.

See also
render-set

Definition

USING: accessors combinators gpu.framebuffers.private
gpu.render.private gpu.shaders kernel opengl.gl ;

IN: gpu.render

: render ( render-set -- )
    {
        [
            vertex-array>> program-instance>> handle>>
            glUseProgram
        ]
        [
            [ vertex-array>> program-instance>> ] [ uniforms>> ]
            bi bind-uniforms
        ]
        [
            framebuffer>> [
                GL_DRAW_FRAMEBUFFER swap framebuffer-handle
                glBindFramebuffer
            ] [
                GL_DRAW_FRAMEBUFFER 0 glBindFramebuffer
                GL_RASTERIZER_DISCARD glEnable
            ] if*
        ]
        [
            [ vertex-array>> program-instance>> ]
            [ framebuffer>> ] [ output-attachments>> ] tri
            bind-output-attachments
        ]
        [ vertex-array>> bind-vertex-array ]
        [
            dup transform-feedback-output>> [
                [
                    primitive-mode>> gl-feedback-primitive-mode
                    glBeginTransformFeedback
                ] [ bind-transform-feedback-output ] bi*
            ] [ drop ] if*
        ]
        [
            [ primitive-mode>> ] [ indexes>> ] [ instances>> ]
            tri
            [ render-vertex-indexes-instanced ]
            [ render-vertex-indexes ] if*
        ]
        [
            transform-feedback-output>>
            [ glEndTransformFeedback ] when
        ]
        [
            framebuffer>>
            [ GL_RASTERIZER_DISCARD glDisable ] unless
        ]
    } cleave ; inline