/*
* RB_BindFrameBufferObject
*/
void RB_BindFrameBufferObject( int object )
{
int width, height;
RFB_BindObject( object );
RFB_CheckObjectStatus();
RFB_GetObjectSize( object, &width, &height );
if( rb.gl.fbHeight != height )
rb.gl.scissorChanged = true;
rb.gl.fbWidth = width;
rb.gl.fbHeight = height;
}
/*
* RFB_RegisterObject
*/
int RFB_RegisterObject( int width, int height, bool builtin, bool depthRB, bool stencilRB,
bool colorRB, int samples, bool useFloat, bool sRGB ) {
int i;
int format;
GLuint fbID;
GLuint rbID = 0;
r_fbo_t *fbo = NULL;
if( !r_frambuffer_objects_initialized ) {
return 0;
}
#ifdef GL_ES_VERSION_2_0
if( samples ) {
return 0;
}
#else
if( samples && !glConfig.ext.framebuffer_multisample ) {
return 0;
}
#endif
for( i = 0, fbo = r_framebuffer_objects; i < r_num_framebuffer_objects; i++, fbo++ ) {
if( !fbo->objectID ) {
// free slot
goto found;
}
}
if( i == MAX_FRAMEBUFFER_OBJECTS ) {
Com_Printf( S_COLOR_YELLOW "RFB_RegisterObject: framebuffer objects limit exceeded\n" );
return 0;
}
clamp_high( samples, glConfig.maxFramebufferSamples );
i = r_num_framebuffer_objects++;
fbo = r_framebuffer_objects + i;
found:
qglGenFramebuffersEXT( 1, &fbID );
memset( fbo, 0, sizeof( *fbo ) );
fbo->objectID = fbID;
if( builtin ) {
fbo->registrationSequence = -1;
} else {
fbo->registrationSequence = rsh.registrationSequence;
}
fbo->width = width;
fbo->height = height;
fbo->samples = samples;
fbo->sRGB = sRGB;
qglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fbo->objectID );
if( colorRB ) {
format = glConfig.forceRGBAFramebuffers ? GL_RGBA : GL_RGB;
if( useFloat ) {
format = glConfig.forceRGBAFramebuffers ? GL_RGBA16F_ARB : GL_RGB16F_ARB;
}
qglGenRenderbuffersEXT( 1, &rbID );
fbo->colorRenderBuffer = rbID;
qglBindRenderbufferEXT( GL_RENDERBUFFER_EXT, rbID );
#ifndef GL_ES_VERSION_2_0
if( samples ) {
qglRenderbufferStorageMultisampleEXT( GL_RENDERBUFFER_EXT, samples, format, width, height );
} else
#endif
qglRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, format, width, height );
}
#ifndef GL_ES_VERSION_2_0
else {
// until a color texture is attached, don't enable drawing to the buffer
qglDrawBuffer( GL_NONE );
qglReadBuffer( GL_NONE );
}
#endif
if( depthRB ) {
qglGenRenderbuffersEXT( 1, &rbID );
fbo->depthRenderBuffer = rbID;
qglBindRenderbufferEXT( GL_RENDERBUFFER_EXT, rbID );
if( stencilRB ) {
format = GL_DEPTH24_STENCIL8_EXT;
} else if( glConfig.ext.depth24 ) {
format = GL_DEPTH_COMPONENT24;
} else if( glConfig.ext.depth_nonlinear ) {
format = GL_DEPTH_COMPONENT16_NONLINEAR_NV;
} else {
format = GL_DEPTH_COMPONENT16;
}
#ifndef GL_ES_VERSION_2_0
if( samples ) {
qglRenderbufferStorageMultisampleEXT( GL_RENDERBUFFER_EXT, samples, format, width, height );
} else
#endif
qglRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, format, width, height );
if( stencilRB ) {
fbo->stencilRenderBuffer = rbID;
}
}
if( rbID ) {
qglBindRenderbufferEXT( GL_RENDERBUFFER_EXT, 0 );
}
if( fbo->colorRenderBuffer ) {
qglFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, fbo->colorRenderBuffer );
}
if( fbo->depthRenderBuffer ) {
qglFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, fbo->depthRenderBuffer );
}
if( fbo->stencilRenderBuffer ) {
qglFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, fbo->stencilRenderBuffer );
}
if( colorRB && depthRB ) {
if( !RFB_CheckObjectStatus() ) {
goto fail;
}
}
if( r_bound_framebuffer_objectID ) {
qglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, r_bound_framebuffer_object->objectID );
} else {
qglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 );
}
return i + 1;
fail:
RFB_DeleteObject( fbo );
qglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 );
return 0;
}
/*
* RFB_AttachTextureToObject
*/
bool RFB_AttachTextureToObject( int object, bool depth, int target, image_t *texture ) {
r_fbo_t *fbo;
int attachment;
GLuint texnum = 0;
assert( object > 0 && object <= r_num_framebuffer_objects );
if( object <= 0 || object > r_num_framebuffer_objects ) {
return false;
}
if( target < 0 || target >= MAX_FRAMEBUFFER_COLOR_ATTACHMENTS ) {
return false;
}
if( target > 0 && !glConfig.ext.draw_buffers ) {
return false;
}
fbo = r_framebuffer_objects + object - 1;
qglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fbo->objectID );
bind:
if( depth ) {
attachment = GL_DEPTH_ATTACHMENT_EXT;
if( texture ) {
assert( texture->flags & IT_DEPTH );
texnum = texture->texnum;
texture->fbo = object;
}
} else {
#ifndef GL_ES_VERSION_2_0
const GLenum fboBuffers[8] = {
GL_COLOR_ATTACHMENT0_EXT,
GL_COLOR_ATTACHMENT1_EXT,
GL_COLOR_ATTACHMENT2_EXT,
GL_COLOR_ATTACHMENT3_EXT,
GL_COLOR_ATTACHMENT4_EXT,
GL_COLOR_ATTACHMENT5_EXT,
GL_COLOR_ATTACHMENT6_EXT,
GL_COLOR_ATTACHMENT7_EXT,
};
#endif
attachment = GL_COLOR_ATTACHMENT0_EXT + target;
#ifndef GL_ES_VERSION_2_0
if( target > 0 && texture ) {
qglDrawBuffersARB( target + 1, fboBuffers );
} else {
if( glConfig.ext.draw_buffers ) {
qglDrawBuffersARB( 0, fboBuffers );
}
qglDrawBuffer( GL_COLOR_ATTACHMENT0_EXT );
qglReadBuffer( GL_COLOR_ATTACHMENT0_EXT );
}
#endif
if( texture ) {
assert( !( texture->flags & IT_DEPTH ) );
texnum = texture->texnum;
texture->fbo = object;
}
}
// attach texture
qglFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, attachment, GL_TEXTURE_2D, texnum, 0 );
if( texture ) {
if( ( texture->flags & ( IT_DEPTH | IT_STENCIL ) ) == ( IT_DEPTH | IT_STENCIL ) ) {
qglFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_TEXTURE_2D, texnum, 0 );
}
}
else {
if( depth ) {
qglFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_TEXTURE_2D, texnum, 0 );
}
}
qglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, r_bound_framebuffer_objectID ? r_bound_framebuffer_object->objectID : 0 );
// check framebuffer status and unbind if failed
if( !RFB_CheckObjectStatus() ) {
if( texture ) {
texture = NULL;
goto bind;
}
return false;
}
if( depth ) {
fbo->depthTexture = texture;
} else {
fbo->colorTexture[target] = texture;
}
return true;
}
