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mask-state
GPU-accelerated rendering > GPU state
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Vocabulary
gpu.state

Class description
The mask-state controls what parts of the framebuffer are written to.
• The color slot is a sequence of four boolean values specifying whether the red, green, blue, and alpha channels of the color buffer will be written to.
• The depth slot is a boolean value specifying whether the depth buffer will be written to.
• The stencil-front and stencil-back slots are integer values that indicate which bits of the stencil buffer will be written to for front- and back-facing triangles, respectively.


See also
<mask-state>, get-mask-state

Definition
USING: kernel math sequences ;

IN: gpu.state

TUPLE: mask-state
{ color sequence read-only initial: { t t t t } }
{ depth boolean read-only initial: t }
{ stencil-front integer read-only initial: 4294967295 }
{ stencil-back integer read-only initial: 4294967295 } ;


Methods
USING: accessors alien.c-types combinators gpu.state kernel
opengl.gl sequences ;

M: mask-state set-gpu-state*
{
[ color>> [ >c-bool ] map first4 glColorMask ]
[ depth>> >c-bool glDepthMask ]
[ GL_FRONT swap stencil-front>> glStencilMaskSeparate ]
[ GL_BACK swap stencil-back>> glStencilMaskSeparate ]
} cleave ;