void RenderTarget::fallbackRescale(int width, int height)
{
int mindim = width < height ? width : height;
int origtexsize = this->texsize;
this->texsize = nearestPower2( mindim, SCALE_MINIFY );
/* Create the texture that will be bound to the render this */
/*
if ( this->texsize != origtexsize ) {
glDeleteTextures( 1, &this->textureID[0] );
}
*/
glGenTextures(1, &this->textureID[0] );
glBindTexture(GL_TEXTURE_2D, this->textureID[0] );
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_RGB,
this->texsize, this->texsize,
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
NULL);
}
/** Creates new pbuffers */
RenderTarget::RenderTarget(int texsize, int width, int height) : useFBO(false) {
int mindim = 0;
int origtexsize = 0;
this->renderToTexture = 0;
this->texsize = texsize;
#ifdef USE_FBO
glewInit();
// Forceably disable FBO if user requested it but the video card / driver lacks
// the appropraite frame buffer extension.
if (useFBO = glewIsSupported("GL_EXT_framebuffer_object"))
{
GLuint fb, depth_rb, rgba_tex, other_tex;
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fb );
glGenRenderbuffersEXT(1, &depth_rb);
glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, depth_rb );
glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, this->texsize,this->texsize );
glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_rb );
this->fbuffer[0] = fb;
this->depthb[0]= depth_rb;
glGenTextures(1, &other_tex);
glBindTexture(GL_TEXTURE_2D,other_tex);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, texsize, texsize, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glGenerateMipmapEXT(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glGenTextures(1, &rgba_tex);
glBindTexture(GL_TEXTURE_2D, rgba_tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, texsize, texsize, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glGenerateMipmapEXT(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, rgba_tex, 0 );
this->textureID[0] = rgba_tex;
this->textureID[1] = other_tex;
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status == GL_FRAMEBUFFER_COMPLETE_EXT) {
return;
}
std::cerr << "[projecM] warning: FBO support not detected. Using fallback." << std::endl;
}
#endif
// Can reach here via two code paths:
// (1) useFBO was set to false externally by cmake / system setting / etc.
// (2) useFBO was true but forced to false as it failed to pass all the GLU extension checks.
/** Fallback pbuffer creation via teximage hack */
/** Check the texture size against the viewport size */
/** If the viewport is smaller, then we'll need to scale the texture size down */
/** If the viewport is larger, scale it up */
mindim = width < height ? width : height;
origtexsize = this->texsize;
this->texsize = nearestPower2( mindim, SCALE_MINIFY );
glGenTextures(1, &this->textureID[0] );
glBindTexture(GL_TEXTURE_2D, this->textureID[0] );
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_RGB,
this->texsize, this->texsize,
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
NULL);
return;
}
/** Creates new pbuffers */
RenderTarget::RenderTarget(int texsize, int width, int height, bool use_fbo) : useFBO(use_fbo) {
int mindim = 0;
int origtexsize = 0;
this->renderToTexture = 0;
this->useFBO = use_fbo;
this->texsize = texsize;
#ifdef USE_FBO
if(this->useFBO)
{
//glewInit();
if(glewIsSupported("GL_EXT_framebuffer_object"))
{
GLuint fb, depth_rb, rgba_tex, other_tex;
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fb );
glGenRenderbuffersEXT(1, &depth_rb);
glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, depth_rb );
glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, this->texsize,this->texsize );
glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_rb );
this->fbuffer[0] = fb;
this->depthb[0]= depth_rb;
glGenTextures(1, &other_tex);
glBindTexture(GL_TEXTURE_2D,other_tex);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, texsize, texsize, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glGenerateMipmapEXT(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glGenTextures(1, &rgba_tex);
glBindTexture(GL_TEXTURE_2D, rgba_tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, texsize, texsize, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glGenerateMipmapEXT(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, rgba_tex, 0 );
this->textureID[0] = rgba_tex;
this->textureID[1] = other_tex;
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status == GL_FRAMEBUFFER_COMPLETE_EXT) {
this->renderToTexture = 1;
return;
}
}
}
this->useFBO=false;
#else
this->useFBO=false;
#endif
/** Fallback pbuf;fer creation via teximage hack */
/** Check the texture size against the viewport size */
/** If the viewport is smaller, then we'll need to scale the texture size down */
/** If the viewport is larger, scale it up */
mindim = width < height ? width : height;
origtexsize = this->texsize;
this->texsize = nearestPower2( mindim, SCALE_MINIFY );
this->texsize = origtexsize; // ^-- ok, texsize is just ignored with this
glGenTextures(1, &this->textureID[0] );
glBindTexture(GL_TEXTURE_2D, this->textureID[0] );
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,
0,
GL_RGB,
this->texsize, this->texsize,
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
NULL);
return;
}
