Hello Carsten,
I have tried to come up with a simple helper class wrapping the creation
process of a framebuffer object. I would like to cover the following
scenarios
one color buffer either as RenderBuffer or as TextureBuffer
a depth buffer either as RenderBuffer or as TextureBuffer
a stencil buffer either as RenderBuffer or as TextureBuffer
I got compiler errors and I'm not sure about the texture part for a depth /
stencil scenario. I have not understand how I should setup the
GL_DEPTH24_STENCIL8 scenario. Additionally, the GL_DEPTH24_STENCIL8 symbol
is not defined. Should it be added to OSGGLEXT.h?
My code...
SimpleFBO::SimpleFBO(
bool depth, // provide depth buffer
bool stencil, // provide stencil buffer
bool color_texture, // color buffer as texture
bool depth_stencil_texture, // depth/stencil buffer as texture
UInt32 width,
UInt32 height)
: _fbo(FrameBufferObject::create())
{
if (color_texture) {
TextureBufferUnrecPtr texBuf = genTextureBuffer(width, height);
_fbo->setColorAttachment(texBuf, 0);
} else {
RenderBufferUnrecPtr renBuf = RenderBuffer::create();
_fbo->setColorAttachment(renBuf, 0);
}
_fbo->editMFDrawBuffers()->push_back(GL_COLOR_ATTACHMENT0_EXT);
if (depth && !stencil) { // only depth buffer
if (depth_stencil_texture) {
TextureBufferUnrecPtr buffer = genTextureBuffer(width, height);
buffer->setInternalFormat(GL_DEPTH_COMPONENT24); // error:
interface doesn't exist
_fbo->setDepthAttachment(buffer);
} else {
RenderBufferUnrecPtr buffer = OSG::RenderBuffer::create();
buffer->setInternalFormat(GL_DEPTH_COMPONENT24);
_fbo->setDepthAttachment(buffer);
}
} else
if (depth && stencil) { // depth buffer + stencil buffer
if (depth_stencil_texture) {
TextureBufferUnrecPtr buffer = genTextureBuffer(width, height);
buffer->setInternalFormat(GL_DEPTH24_STENCIL8); // error:
interface doesn't exist
_fbo->setDepthAttachment(buffer); // error ?
_fbo->setStencilAttachment(buffer);
} else {
RenderBufferUnrecPtr buffer = OSG::RenderBuffer::create();
buffer->setInternalFormat(GL_DEPTH24_STENCIL8); // error:
symbol unknown
_fbo->setDepthAttachment(buffer);
_fbo->setStencilAttachment(buffer);
}
}
if (!depth && stencil) { // no depth buffer but stencil buffer
??? is this possible
}
_fbo->setWidth (width );
_fbo->setHeight(height);
}
osg::TextureBufferTransitPtr SimpleFBO::genTextureBuffer(osg::UInt32 width,
osg::UInt32 height)
{
ImageUnrecPtr texImg = Image::create();
TextureObjChunkUnrecPtr texObj = TextureObjChunk::create();
TextureBufferUnrecPtr texBuf = TextureBuffer::create();
texImg->set(Image::OSG_RGB_PF, width, height);
texObj->setImage(texImg);
texBuf->setTexture(texObj);
return TextureBufferTransitPtr(texBuf);
}
Gerrit has provided this line of GL code in another thread:
http://www.mail-archive.com/[email protected]/msg13160.html
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8_EXT,
512, 512, 0, GL_DEPTH_STENCIL_EXT,
GL_UNSIGNED_INT_24_8_EXT, NULL);
What is the place I have to provide the GL_DEPTH24_STENCIL8_EXT and
GL_DEPTH_STENCIL_EXT parameters in my setup?
Could you give me an additional push...
Best,
Johannes
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