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buffers.h File Reference

Frame buffer management functions declarations. More...

#include "mtypes.h"

Functions
void GLAPIENTRY	_mesa_ClearIndex (GLfloat c)
void GLAPIENTRY	_mesa_ClearColor (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
	Specify the clear values for the color buffers. More...
void GLAPIENTRY	_mesa_Clear (GLbitfield mask)
	Clear buffers. More...
void GLAPIENTRY	_mesa_DrawBuffer (GLenum mode)
	Specify which color buffers to draw into. More...
void GLAPIENTRY	_mesa_ReadBuffer (GLenum mode)
	Set the color buffer source for reading pixels. More...
void GLAPIENTRY	_mesa_ResizeBuffersMESA (void)
	GL_MESA_resize_buffers extension. More...
void GLAPIENTRY	_mesa_Scissor (GLint x, GLint y, GLsizei width, GLsizei height)
	Define the scissor box. More...
void GLAPIENTRY	_mesa_SampleCoverageARB (GLclampf value, GLboolean invert)
void	_mesa_init_buffers (GLcontext *ctx)
	Initialize the context scissor data. More...
void	_mesa_update_buffers (GLcontext *ctx)
	Update screen bounds. More...

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Detailed Description

Frame buffer management functions declarations.

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Function Documentation

void GLAPIENTRY _mesa_Clear (  GLbitfield    mask )

Clear buffers. Parameters: mask  bit-mask indicating the buffers to be cleared. Flushes the vertices and verifies the parameter. If __GLcontextRec::NewState is set then calls _mesa_update_state() to update gl_frame_buffer::_Xmin, etc. If the rasterization mode is set to GL_RENDER then requests the driver to clear the buffers, via the dd_function_table::Clear callback.

void GLAPIENTRY _mesa_ClearColor (  GLclampf    red, GLclampf    green, GLclampf    blue, GLclampf    alpha )

Specify the clear values for the color buffers. Parameters: red  red color component. green  green color component. blue  blue color component. alpha  alpha component. See also: glClearColor(). Clamps the parameters and updates gl_colorbuffer_attrib::ClearColor. On a change, flushes the vertices and notifies the driver via the dd_function_table::ClearColor callback.

void GLAPIENTRY _mesa_ClearIndex (  GLfloat    c )

void GLAPIENTRY _mesa_DrawBuffer (  GLenum    mode )

Specify which color buffers to draw into. Parameters: mode  color buffer combination. See also: glDrawBuffer(). Flushes the vertices and verifies the parameter and updates the gl_colorbuffer_attrib::_DrawDestMask bitfield. Marks new color state in __GLcontextRec::NewState and notifies the driver via the dd_function_table::DrawBuffer callback.

void _mesa_init_buffers (  GLcontext *    ctx )

Initialize the context scissor data. Parameters: ctx  GL context. Initializes the __GLcontextRec::Scissor and __GLcontextRec::Multisample attribute groups, and related constants in __GLcontextRec::Const.

void GLAPIENTRY _mesa_ReadBuffer (  GLenum    mode )

Set the color buffer source for reading pixels. Parameters: mode  color buffer. See also: glReadBuffer(). Verifies the parameter and updates gl_pixel_attrib::_ReadSrcMask. Marks new pixel state in __GLcontextRec::NewState and notifies the driver via dd_function_table::ReadBuffer.

void GLAPIENTRY _mesa_ResizeBuffersMESA (  void    )

GL_MESA_resize_buffers extension. When this function is called, we'll ask the window system how large the current window is. If it's a new size, we'll call the driver's ResizeBuffers function. The driver will then resize its color buffers as needed, and maybe call the swrast's routine for reallocating swrast-managed depth/stencil/accum/etc buffers. Note: This function may be called from within Mesa or called by the user directly (see the GL_MESA_resize_buffers extension).

void GLAPIENTRY _mesa_SampleCoverageARB (  GLclampf    value, GLboolean    invert )

void GLAPIENTRY _mesa_Scissor (  GLint    x, GLint    y, GLsizei    width, GLsizei    height )

Define the scissor box. Parameters: x, y  coordinates of the scissor box lower-left corner. width  width of the scissor box. height  height of the scissor box. See also: glScissor(). Verifies the parameters and updates __GLcontextRec::Scissor. On a change flushes the vertices and notifies the driver via the dd_function_table::Scissor callback.

void _mesa_update_buffers (  GLcontext *    ctx )

Update screen bounds. Parameters: ctx  GL context. Update gl_frame_buffer::_Xmin, and etc.

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