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Clementine-audio-player-Mac.../3rdparty/libprojectm/Renderer/FBO.cpp

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/**
* projectM -- Milkdrop-esque visualisation SDK
* Copyright (C)2003-2004 projectM Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* See 'LICENSE.txt' included within this release
*
*/
/**
* $Id: FBO.c,v 1.1.1.1 2005/12/23 18:05:00 psperl Exp $
*
* Render this methods
*/
#include <stdio.h>
//#include <GL/gl.h>
#include <iostream>
#include "Common.hpp"
#include "FBO.hpp"
RenderTarget::~RenderTarget() {
glDeleteTextures( 1, &this->textureID[0]);
#ifdef USE_FBO
if (useFBO)
{
glDeleteTextures( 1, &this->textureID[1] );
glDeleteRenderbuffersEXT(1, &this->depthb[0]);
glDeleteFramebuffersEXT(1, &this->fbuffer[0]);
if(renderToTexture)
{
glDeleteTextures( 1, &this->textureID[2] );
glDeleteRenderbuffersEXT(1, &this->depthb[1]);
glDeleteFramebuffersEXT(1, &this->fbuffer[1]);
}
}
#endif
}
GLuint RenderTarget::initRenderToTexture()
{
#ifdef USE_FBO
if (this->useFBO==1)
{
this->renderToTexture=1;
GLuint fb2, depth_rb2;
glGenFramebuffersEXT(1, &fb2);
glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fb2 );
glGenRenderbuffersEXT(1, &depth_rb2);
glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, depth_rb2 );
glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, this->texsize,this->texsize );
glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_rb2 );
this->fbuffer[1] = fb2;
this->depthb[1]= depth_rb2;
glGenTextures(1, &this->textureID[2]);
glBindTexture(GL_TEXTURE_2D, this->textureID[2]);
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);
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, this->textureID[2], 0 );
return this->textureID[2];
}
#endif
return -1;
}
/** 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;
}
void RenderTarget::fallbackRescale(int width, int height)
{
int mindim = width < height ? width : height;
int origtexsize = this->texsize;
this->texsize = nearestPower2( mindim, SCALE_MINIFY );
if (origtexsize == texsize)
return;
/* 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);
}
/** Destroys the pbuffer */
/** Locks the pbuffer */
void RenderTarget::lock() {
#ifdef USE_FBO
if(this->useFBO)
{
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, this->fbuffer[0]);
}
#endif
}
/** Unlocks the pbuffer */
void RenderTarget::unlock() {
#ifdef USE_FBO
if(this->useFBO)
{
glBindTexture( GL_TEXTURE_2D, this->textureID[1] );
glCopyTexSubImage2D( GL_TEXTURE_2D,
0, 0, 0, 0, 0,
this->texsize, this->texsize );
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
return;
}
#endif
/** Fallback texture path */
glBindTexture( GL_TEXTURE_2D, this->textureID[0] );
glCopyTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, 0, 0, this->texsize, this->texsize );
}
/**
* Calculates the nearest power of two to the given number using the
* appropriate rule
*/
int RenderTarget::nearestPower2( int value, TextureScale scaleRule ) {
int x = value;
int power = 0;
while ( ( x & 0x01 ) != 1 ) {
x >>= 1;
}
if ( x == 1 ) {
return value;
} else {
x = value;
while ( x != 0 ) {
x >>= 1;
power++;
}
switch ( scaleRule ) {
case SCALE_NEAREST:
if ( ( ( 1 << power ) - value ) <= ( value - ( 1 << ( power - 1 ) ) ) ) {
return 1 << power;
} else {
return 1 << ( power - 1 );
}
case SCALE_MAGNIFY:
return 1 << power;
case SCALE_MINIFY:
return 1 << ( power - 1 );
default:
break;
}
}
return 0;
}
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