s_stencil.h File Reference

#include "swrast.h"

Functions
GLboolean	_swrast_stencil_and_ztest_span (GLcontext *ctx, SWspan *span)
	/return GL_TRUE = one or more fragments passed, GL_FALSE = all fragments failed.
void	_swrast_read_stencil_span (GLcontext *ctx, struct gl_renderbuffer *rb, GLint n, GLint x, GLint y, GLstencil stencil[])
	Return a span of stencil values from the stencil buffer.
void	_swrast_write_stencil_span (GLcontext *ctx, GLint n, GLint x, GLint y, const GLstencil stencil[])
	Write a span of stencil values to the stencil buffer.
void	_swrast_clear_stencil_buffer (GLcontext *ctx, struct gl_renderbuffer *rb)
	Clear the stencil buffer.

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Function Documentation

void _swrast_clear_stencil_buffer	(	GLcontext *	ctx,
		struct gl_renderbuffer *	rb
	)

Clear the stencil buffer.

void _swrast_read_stencil_span	(	GLcontext *	ctx,
		struct gl_renderbuffer *	rb,
		GLint	n,
		GLint	x,
		GLint	y,
		GLstencil	stencil[]
	)

Return a span of stencil values from the stencil buffer.

Used for glRead/CopyPixels Input: n - how many pixels x,y - location of first pixel Output: stencil - the array of stencil values

GLboolean _swrast_stencil_and_ztest_span	(	GLcontext *	ctx,
		SWspan *	span
	)

/return GL_TRUE = one or more fragments passed, GL_FALSE = all fragments failed.

void _swrast_write_stencil_span	(	GLcontext *	ctx,
		GLint	n,
		GLint	x,
		GLint	y,
		const GLstencil	stencil[]
	)

Write a span of stencil values to the stencil buffer.

This function applies the stencil write mask when needed. Used for glDraw/CopyPixels Input: n - how many pixels x, y - location of first pixel stencil - the array of stencil values

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