GLvoid APIENTRY GLDSA_NamedRenderbufferStorageMultisample(GLuint renderbuffer,
GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height)
{
GL_BindRenderbuffer(renderbuffer);
qglRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, samples, internalformat, width, height);
}
/**
* @brief create a new framebuffer object
* @param[in] width The width of the framebuffer
* @param[in] height The height of the framebuffer
* @param[in] ntextures The amount of textures for this framebuffer. See also the filters array.
* @param[in] depth Also generate a depth buffer
* @param[in] halfFloat Use half float pixel format
* @param[in] filters Filters for the textures. Must have @c ntextures entries
*/
r_framebuffer_t * R_CreateFramebuffer (int width, int height, int ntextures, bool depth, bool halfFloat, unsigned int *filters)
{
r_framebuffer_t *buf;
int i;
if (!r_state.frameBufferObjectsInitialized) {
Com_Printf("Warning: framebuffer creation failed; framebuffers not initialized!\n");
return NULL;
}
if (frameBufferObjectCount >= lengthof(frameBufferObjects)) {
Com_Printf("Warning: framebuffer creation failed; already created too many framebuffers!\n");
return NULL;
}
buf = &frameBufferObjects[frameBufferObjectCount++];
OBJZERO(*buf);
if (ntextures > r_config.maxDrawBuffers) {
Com_Printf("Couldn't allocate requested number of drawBuffers in R_SetupFramebuffer!\n");
ntextures = r_config.maxDrawBuffers;
}
Vector4Clear(buf->clearColor);
buf->width = width;
buf->height = height;
R_SetupViewport(buf, 0, 0, width, height);
buf->nTextures = ntextures;
buf->textures = Mem_AllocTypeN(unsigned int, ntextures);
buf->pixelFormat = halfFloat ? GL_RGBA16F_ARB : GL_RGBA8;
buf->byteFormat = halfFloat ? GL_HALF_FLOAT_ARB : GL_UNSIGNED_BYTE;
/* Presence of depth buffer indicates render target that could use antialiasing*/
if (depth) {
/** @todo also check if we are running on older (SM2.0) hardware, which doesn't support antialiased MRT */
if (qglRenderbufferStorageMultisampleEXT && qglBlitFramebuffer) {
int samples = std::min(4, std::max(0, r_multisample->integer));
if (samples>1)
buf->samples = samples;
}
}
for (i = 0; i < buf->nTextures; i++) {
buf->textures[i] = R_GetFreeFBOTexture();
glBindTexture(GL_TEXTURE_2D, buf->textures[i]);
glTexImage2D(GL_TEXTURE_2D, 0, buf->pixelFormat, buf->width, buf->height, 0, GL_RGBA, buf->byteFormat, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filters[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
qglGenerateMipmapEXT(GL_TEXTURE_2D);
if (r_config.anisotropic)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, r_config.maxAnisotropic);
R_CheckError();
}
glBindTexture(GL_TEXTURE_2D, 0);
/* create FBO itself */
qglGenFramebuffersEXT(1, &buf->fbo);
R_CheckError();
qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, buf->fbo);
/* create&attach depth renderbuffer */
if (depth) {
qglGenRenderbuffersEXT(1, &buf->depth);
qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, buf->depth);
if (buf->samples)
qglRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, buf->samples, GL_DEPTH_COMPONENT, buf->width, buf->height);
else
qglRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, buf->width, buf->height);
qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, buf->depth);
} else {
buf->depth = 0;
}
/* create multisample color buffers if needed */
if (buf->samples) {
/* generate color buffers */
for (i = 0; i < buf->nTextures; i++) {
unsigned colorbuffer;
qglGenRenderbuffersEXT(1, &colorbuffer);
qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, colorbuffer);
qglRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, buf->samples, buf->pixelFormat, buf->width, buf->height);
qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, colorAttachments[i], GL_RENDERBUFFER_EXT, colorbuffer);
R_CheckError();
}
/* proxy framebuffer object for resolving MSAA */
qglGenFramebuffersEXT(1, &buf->proxyFBO);
R_CheckError();
qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, buf->proxyFBO);
}
/* Whether multisampling was enabled or not, current FBO should be populated with render-to-texture bindings */
for (i = 0; i < buf->nTextures; i++) {
qglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, colorAttachments[i], GL_TEXTURE_2D, buf->textures[i], 0);
R_CheckError();
}
R_CheckError();
/* unbind the framebuffer and return to default state */
qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
return buf;
}
void FBO_CreateBuffer(FBO_t *fbo, int format, int index, int multisample)
{
uint32_t *pRenderBuffer;
GLenum attachment;
qboolean absent;
switch(format)
{
case GL_RGB:
case GL_RGBA:
case GL_RGB8:
case GL_RGBA8:
case GL_RGB16F_ARB:
case GL_RGBA16F_ARB:
case GL_RGB32F_ARB:
case GL_RGBA32F_ARB:
fbo->colorFormat = format;
pRenderBuffer = &fbo->colorBuffers[index];
attachment = GL_COLOR_ATTACHMENT0_EXT + index;
break;
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16_ARB:
case GL_DEPTH_COMPONENT24_ARB:
case GL_DEPTH_COMPONENT32_ARB:
fbo->depthFormat = format;
pRenderBuffer = &fbo->depthBuffer;
attachment = GL_DEPTH_ATTACHMENT_EXT;
break;
case GL_STENCIL_INDEX:
case GL_STENCIL_INDEX1_EXT:
case GL_STENCIL_INDEX4_EXT:
case GL_STENCIL_INDEX8_EXT:
case GL_STENCIL_INDEX16_EXT:
fbo->stencilFormat = format;
pRenderBuffer = &fbo->stencilBuffer;
attachment = GL_STENCIL_ATTACHMENT_EXT;
break;
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH24_STENCIL8_EXT:
fbo->packedDepthStencilFormat = format;
pRenderBuffer = &fbo->packedDepthStencilBuffer;
attachment = 0; // special for stencil and depth
break;
default:
ri.Printf(PRINT_WARNING, "FBO_CreateBuffer: invalid format %d\n", format);
return;
}
absent = *pRenderBuffer == 0;
if (absent)
qglGenRenderbuffersEXT(1, pRenderBuffer);
qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, *pRenderBuffer);
if (multisample && glRefConfig.framebufferMultisample)
{
qglRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, multisample, format, fbo->width, fbo->height);
}
else
{
qglRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, format, fbo->width, fbo->height);
}
if(absent)
{
if (attachment == 0)
{
qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, *pRenderBuffer);
qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, *pRenderBuffer);
}
else
qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, attachment, GL_RENDERBUFFER_EXT, *pRenderBuffer);
}
}
/*
* 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;
}