void
FrameBufferObject::deallocate()
{
std::fill(_attachedColorTextures, _attachedColorTextures+16, (ImageTexture2D *)0);
glDeleteFramebuffersEXT(1, &_fboID);
checkGLErrorsHere1(_fboName);
}
bool
FrameBufferObject::allocate()
{
glGenFramebuffersEXT(1, &_fboID);
checkGLErrorsHere1(_fboName);
return true;
}
void
ImageTexture2D::clear()
{
glBindTexture(_textureTarget, _textureID);
glTexImage2D(_textureTarget, 0, GL_RGB, 0, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
checkGLErrorsHere1(_texName);
}
void ImageTexture2D::deallocateID() {
if (_textureID == 0)
return;
this->clear();
glDeleteTextures(1, &_textureID);
_textureID = 0;
checkGLErrorsHere1(_texName);
}
void ImageTexture2D::overwriteWith(float const * pixels, int nChannels) {
unsigned const format = extPixelFormat[nChannels];
unsigned const type = GL_FLOAT;
glBindTexture(_textureTarget, _textureID);
glTexSubImage2D(_textureTarget, 0, 0, 0, _width, _height, format, type,
pixels);
checkGLErrorsHere1(_texName);
}
void ImageTexture2D::reserve(int width, int height,
TextureSpecification const& texSpec) {
_width = width;
_height = height;
unsigned internalFormat = texSpec.getGLInternalFormat();
unsigned format = texSpec.isDepthTexture ? GL_DEPTH_COMPONENT : GL_RGB;
unsigned type = texSpec.isFloatTexture ? GL_FLOAT : GL_UNSIGNED_BYTE;
glBindTexture(_textureTarget, _textureID);
glTexImage2D(_textureTarget, 0, internalFormat, _width, _height, 0, format,
type, 0);
checkGLErrorsHere1(_texName);
}
void
ImageTexture2D::overwriteWith(float const * redPixels, float const * greenPixels, float const * bluePixels)
{
unsigned const format = extPixelFormat[3];
unsigned const type = GL_FLOAT;
float * pixels = new float[3 * _width * _height];
interleavePixels(_width, _height, redPixels, greenPixels, bluePixels, pixels);
glBindTexture(_textureTarget, _textureID);
glTexSubImage2D(_textureTarget, 0, 0, 0, _width, _height, format, type, pixels);
delete [] pixels;
checkGLErrorsHere1(_texName);
}
void FrameBufferObject::detach(GLenum attachment) {
if (this->checkBinding("FrameBufferObject::detach()")) {
if (attachment >= GL_COLOR_ATTACHMENT0_EXT
&& attachment <= GL_COLOR_ATTACHMENT15_EXT) {
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_TEXTURE_2D, 0, 0);
_attachedColorTextures[attachment - GL_COLOR_ATTACHMENT0_EXT] = 0;
} else if (attachment == GL_DEPTH_ATTACHMENT_EXT) {
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment,
GL_TEXTURE_2D, 0, 0);
_attachedDepthTexture = 0;
} else
raiseGLErrorHere2("Unknown/unsupported attachment specifier",
_fboName.c_str());
}checkGLErrorsHere1(_fboName);
}
void ImageTexture2D::overwriteWith(uchar const * redPixels,
uchar const * greenPixels, uchar const * bluePixels,
uchar const * alphaPixels) {
unsigned const format = extPixelFormat[4];
unsigned const type = GL_UNSIGNED_BYTE;
unsigned char * pixels = new unsigned char[4 * _width * _height];
interleavePixels(_width, _height, redPixels, greenPixels, bluePixels,
alphaPixels, pixels);
glBindTexture(_textureTarget, _textureID);
glTexSubImage2D(_textureTarget, 0, 0, 0, _width, _height, format, type,
pixels);
delete[] pixels;
checkGLErrorsHere1(_texName);
}
void FrameBufferObject::attachTexture2D(ImageTexture2D& texture,
GLenum attachment, int mipLevel) {
if (this->checkBinding("FrameBufferObject::attachTexture2D()")) {
if (attachment >= GL_COLOR_ATTACHMENT0_EXT
&& attachment <= GL_COLOR_ATTACHMENT15_EXT) {
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment,
texture.textureTarget(), texture.textureID(), mipLevel);
_attachedColorTextures[attachment - GL_COLOR_ATTACHMENT0_EXT] =
&texture;
} else if (attachment == GL_DEPTH_ATTACHMENT_EXT) {
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment,
texture.textureTarget(), texture.textureID(), mipLevel);
_attachedDepthTexture = &texture;
} else
raiseGLErrorHere2("Unknown/unsupported attachment specifier",
_fboName.c_str());
}checkGLErrorsHere1(_fboName);
}
void FrameBufferObject::makeCurrent() {
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _fboID);
checkGLErrorsHere1(_fboName);
}
