r_framebuffer.c File Reference

Framebuffer Objects support. More...

#include "r_local.h"
#include "r_framebuffer.h"
#include "r_error.h"

Include dependency graph for r_framebuffer.c:

Go to the source code of this file.

Defines
#define	MAX_FRAMEBUFFER_OBJECTS 64
Functions
static GLuint	R_GetFreeFBOTexture (void)
static void	R_FreeFBOTexture (int texnum)
void	R_InitFBObjects (void)
void	R_DeleteFBObject (r_framebuffer_t *buf)
	Delete framebuffer object along with attached render buffer.
void	R_ShutdownFBObjects (void)
	Delete all registered framebuffer and render buffer objects, clear memory.
r_framebuffer_t *	R_CreateFramebuffer (int width, int height, int ntextures, qboolean depth, qboolean halfFloat, unsigned int *filters)
	create a new framebuffer object
void	R_UseFramebuffer (const r_framebuffer_t *buf)
	bind specified framebuffer object so we render to it
void	R_SetupViewport (r_framebuffer_t *buf, int x, int y, int width, int height)
	Sets the framebuffer dimensions of the viewport.
void	R_UseViewport (const r_framebuffer_t *buf)
	Set the viewport to the dimensions of the given framebuffer.
void	R_DrawBuffers (int n)
void	R_BindColorAttachments (int n, unsigned int *attachments)
qboolean	R_EnableRenderbuffer (qboolean enable)
qboolean	R_RenderbufferEnabled (void)
Variables
static int	frameBufferObjectCount
static r_framebuffer_t	frameBufferObjects [MAX_FRAMEBUFFER_OBJECTS]
static GLuint	frameBufferTextures [TEXNUM_FRAMEBUFFER_TEXTURES]
static r_framebuffer_t	screenBuffer
static GLenum *	colorAttachments

Detailed Description

Framebuffer Objects support.

Definition in file r_framebuffer.c.

Define Documentation

#define MAX_FRAMEBUFFER_OBJECTS 64

Definition at line 29 of file r_framebuffer.c.

Function Documentation

void R_BindColorAttachments	(	int	n,
		unsigned int *	attachments
	)

Definition at line 332 of file r_framebuffer.c.

References rstate_t::activeFramebuffer, Com_DPrintf(), DEBUG_RENDERER, rconfig_t::frameBufferObject, rstate_t::frameBufferObjectsInitialized, cvar_s::integer, rconfig_t::maxDrawBuffers, r_framebuffer_t::nTextures, r_config, r_postprocess, r_programs, and r_state.

Referenced by R_DrawBuffers(), R_EnableDrawAsGlow(), and R_EnableGlowMap().

r_framebuffer_t* R_CreateFramebuffer	(	int	width,
		int	height,
		int	ntextures,
		qboolean	depth,
		qboolean	halfFloat,
		unsigned int *	filters
	)

create a new framebuffer object

Parameters:

`[in]`	width	The width of the framebuffer
`[in]`	height	The height of the framebuffer
`[in]`	ntextures	The amount of textures for this framebuffer. See also the filters array.
`[in]`	depth	Also generate a depth buffer
`[in]`	halfFloat	Use half float pixel format
`[in]`	filters	Filters for the textures. Must have `ntextures` entries

Definition at line 174 of file r_framebuffer.c.

References rconfig_t::anisotropic, r_framebuffer_t::byteFormat, r_framebuffer_t::clearColor, colorAttachments, Com_Printf(), r_framebuffer_t::depth, r_framebuffer_t::fbo, frameBufferObjectCount, rstate_t::frameBufferObjectsInitialized, r_framebuffer_t::height, i, lengthof, rconfig_t::maxAnisotropic, rconfig_t::maxDrawBuffers, Mem_Alloc, r_framebuffer_t::nTextures, r_framebuffer_t::pixelFormat, qtrue, R_CheckError, r_config, R_GetFreeFBOTexture(), R_SetupViewport(), r_state, r_framebuffer_t::textures, Vector4Clear, and r_framebuffer_t::width.

Referenced by R_InitFBObjects().

void R_DeleteFBObject ( r_framebuffer_t * buf )

Delete framebuffer object along with attached render buffer.

Definition at line 122 of file r_framebuffer.c.

References r_framebuffer_t::depth, r_framebuffer_t::fbo, i, Mem_Free, r_framebuffer_t::nTextures, R_FreeFBOTexture(), and r_framebuffer_t::textures.

Referenced by R_ShutdownFBObjects().

void R_DrawBuffers ( int n )

Todo:: introduce enum or speaking constants for the buffer numbers that are drawn here and elsewhere

Definition at line 327 of file r_framebuffer.c.

References colorAttachments, and R_BindColorAttachments().

Referenced by R_Draw3DGlobe(), R_EnableDrawAsGlow(), R_EnableGlowMap(), and R_EnableRenderbuffer().

qboolean R_EnableRenderbuffer ( qboolean enable )

Definition at line 346 of file r_framebuffer.c.

References fbo_render, fbo_screen, rconfig_t::frameBufferObject, rstate_t::frameBufferObjectsInitialized, cvar_s::integer, qfalse, qtrue, r_config, R_DrawBuffers(), r_postprocess, r_programs, r_state, R_UseFramebuffer(), and rstate_t::renderbuffer_enabled.

Referenced by MAP_DrawMap(), R_DrawBloom(), R_Setup2D(), and R_Setup3D().

static void R_FreeFBOTexture ( int texnum ) [static]

Definition at line 52 of file r_framebuffer.c.

References frameBufferTextures, i, and TEXNUM_FRAMEBUFFER_TEXTURES.

Referenced by R_DeleteFBObject().

static GLuint R_GetFreeFBOTexture ( void ) [static]

Definition at line 38 of file r_framebuffer.c.

References Com_Error(), ERR_FATAL, frameBufferTextures, i, and TEXNUM_FRAMEBUFFER_TEXTURES.

Referenced by R_CreateFramebuffer().

void R_InitFBObjects ( void )

qboolean R_RenderbufferEnabled ( void )

Definition at line 364 of file r_framebuffer.c.

References r_state, and rstate_t::renderbuffer_enabled.

Referenced by R_DrawBloom().

void R_SetupViewport	(	r_framebuffer_t *	buf,
		int	x,
		int	y,
		int	width,
		int	height
	)

Sets the framebuffer dimensions of the viewport.

Parameters:

[out] buf The framebuffer to initialize the viewport for. If NULL the screen buffer will be taken.

See also:: R_UseViewport

Definition at line 300 of file r_framebuffer.c.

References r_viewport_t::height, r_framebuffer_t::viewport, r_viewport_t::width, r_viewport_t::x, and r_viewport_t::y.

Referenced by R_CreateFramebuffer(), and R_InitFBObjects().

void R_ShutdownFBObjects ( void )

Delete all registered framebuffer and render buffer objects, clear memory.

Definition at line 145 of file r_framebuffer.c.

References colorAttachments, frameBufferObjectCount, rstate_t::frameBufferObjectsInitialized, i, Mem_Free, qfalse, R_DeleteFBObject(), r_state, and R_UseFramebuffer().

Referenced by R_SetMode(), and R_Shutdown().

void R_UseFramebuffer ( const r_framebuffer_t * buf )

bind specified framebuffer object so we render to it

Parameters:

[in] buf the framebuffer to use, if NULL the screen buffer will be used.

Todo:: buf != &screenBuffer

Definition at line 263 of file r_framebuffer.c.

References rstate_t::activeFramebuffer, r_framebuffer_t::clearColor, colorAttachments, Com_Printf(), r_framebuffer_t::depth, r_framebuffer_t::fbo, rconfig_t::frameBufferObject, rstate_t::frameBufferObjectsInitialized, cvar_s::integer, r_framebuffer_t::nTextures, R_CheckError, r_config, r_postprocess, r_programs, and r_state.

Referenced by R_BlurStack(), R_DrawBloom(), R_EnableBlur(), R_EnableRenderbuffer(), and R_ShutdownFBObjects().

void R_UseViewport ( const r_framebuffer_t * buf )

Set the viewport to the dimensions of the given framebuffer.

Parameters:

[out] buf The framebuffer to set the viewport for. If NULL the screen buffer will be taken.

See also:: R_SetupViewport

Definition at line 316 of file r_framebuffer.c.

References rconfig_t::frameBufferObject, rstate_t::frameBufferObjectsInitialized, r_viewport_t::height, cvar_s::integer, r_config, r_postprocess, r_programs, r_state, r_framebuffer_t::viewport, r_viewport_t::width, r_viewport_t::x, and r_viewport_t::y.

Referenced by R_Blur(), R_BlurStack(), and R_DrawBloom().

Variable Documentation

GLenum* colorAttachments [static]

Definition at line 36 of file r_framebuffer.c.

Referenced by R_CreateFramebuffer(), R_DrawBuffers(), R_InitFBObjects(), R_ShutdownFBObjects(), and R_UseFramebuffer().

int frameBufferObjectCount [static]

Definition at line 31 of file r_framebuffer.c.

Referenced by R_CreateFramebuffer(), R_InitFBObjects(), and R_ShutdownFBObjects().

r_framebuffer_t frameBufferObjects[MAX_FRAMEBUFFER_OBJECTS] [static]

Definition at line 32 of file r_framebuffer.c.

GLuint frameBufferTextures[TEXNUM_FRAMEBUFFER_TEXTURES] [static]

Definition at line 33 of file r_framebuffer.c.

Referenced by R_FreeFBOTexture(), R_GetFreeFBOTexture(), and R_InitFBObjects().

r_framebuffer_t screenBuffer [static]

Definition at line 35 of file r_framebuffer.c.

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