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/*
* Copyright 2010 Inalogic® Inc.
*
* This program 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 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Jay Taoko <jaytaoko@inalogic.com>
*
*/
#include "GLResource.h"
#include "GpuDevice.h"
#include "GLDeviceObjects.h"
#include "GLResourceManager.h"
#include "GLTextureResourceManager.h"
#include "GLVertexResourceManager.h"
#include "GLDeviceFrameBufferObject.h"
#include "GLTemplatePrimitiveBuffer.h"
#include "GraphicsEngine.h"
namespace nux
{
GLenum AttachmentBuffer[] =
{
GL_COLOR_ATTACHMENT0_EXT
, GL_COLOR_ATTACHMENT1_EXT
, GL_COLOR_ATTACHMENT2_EXT
, GL_COLOR_ATTACHMENT3_EXT
};
//////////////////////////////////////////////////////////////////////////
// GLFramebufferObject
//////////////////////////////////////////////////////////////////////////
GLFramebufferObject::GLFramebufferObject()
: m_fboId (0)
, m_savedFboId (0)
{
m_fboId = _GenerateFboId();
// Bind this FBO so that it actually gets created now
_GuardedBind();
_GuardedUnbind();
}
GLFramebufferObject::~GLFramebufferObject()
{
CHECKGL ( glDeleteFramebuffersEXT (1, (const GLuint *) &m_fboId) );
}
void GLFramebufferObject::Bind()
{
CHECKGL ( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, m_fboId) );
}
void GLFramebufferObject::Disable()
{
CHECKGL ( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0) );
}
void
GLFramebufferObject::AttachTexture ( GLenum attachment, GLenum texType,
GLuint texId, int mipLevel, int zSlice)
{
_GuardedBind();
if ( GetAttachedId (attachment) != texId )
{
_FramebufferTextureND ( attachment, texType,
texId, mipLevel, zSlice );
}
else
{
// nuxError(TEXT("GLFramebufferObject::AttachTexture PERFORMANCE WARNING:\n
// \tRedundant bind of texture (id = %d).\n"), texId);
}
_GuardedUnbind();
}
void
GLFramebufferObject::AttachTextures ( int numTextures, GLenum texTarget[], GLuint texId[],
GLenum attachment[], int mipLevel[], int zSlice[] )
{
for (int i = 0; i < numTextures; ++i)
{
AttachTexture ( texTarget[i], texId[i],
attachment ? attachment[i] : (GL_COLOR_ATTACHMENT0_EXT + i),
mipLevel ? mipLevel[i] : 0,
zSlice ? zSlice[i] : 0 );
}
}
void
GLFramebufferObject::AttachRenderBuffer ( GLenum attachment, GLuint buffId )
{
_GuardedBind();
if ( GetAttachedId (attachment) != buffId )
{
CHECKGL ( glFramebufferRenderbufferEXT ( GL_FRAMEBUFFER_EXT, attachment,
GL_RENDERBUFFER_EXT, buffId) );
}
else
{
// nuxError(TEXT("GLFramebufferObject::AttachRenderBuffer PERFORMANCE WARNING:\n
// \tRedundant bind of GLRenderbuffer (id = %d).\n"), buffId);
}
_GuardedUnbind();
}
void
GLFramebufferObject::Unattach ( GLenum attachment )
{
_GuardedBind();
GLenum type = GetAttachedType (attachment);
switch (type)
{
case GL_NONE:
break;
case GL_RENDERBUFFER_EXT:
AttachRenderBuffer ( attachment, 0 );
break;
case GL_TEXTURE:
AttachTexture ( attachment, GL_TEXTURE_2D, 0 );
break;
default:
std::cout << "GLFramebufferObject::unbind_attachment ERROR: Unknown attached resource type\n";
}
_GuardedUnbind();
}
GLint GLFramebufferObject::GetMaxColorAttachments()
{
GLint maxAttach = 0;
CHECKGL ( glGetIntegerv ( GL_MAX_COLOR_ATTACHMENTS_EXT, &maxAttach ) );
return maxAttach;
}
GLuint GLFramebufferObject::_GenerateFboId()
{
GLuint id = 0;
CHECKGL ( glGenFramebuffersEXT (1, &id) );
return id;
}
void GLFramebufferObject::_GuardedBind()
{
#ifndef NUX_OPENGLES_20
// Only binds if m_fboId is different than the currently bound FBO
CHECKGL ( glGetIntegerv ( GL_FRAMEBUFFER_BINDING_EXT, &m_savedFboId ) );
if (m_fboId != m_savedFboId)
{
CHECKGL ( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, m_fboId) );
}
#else
CHECKGL ( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, m_fboId) );
#endif
}
void GLFramebufferObject::_GuardedUnbind()
{
// Returns FBO binding to the previously enabled FBO
if (m_savedFboId != m_fboId)
{
CHECKGL ( glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, (GLuint) m_savedFboId) );
}
}
void
GLFramebufferObject::_FramebufferTextureND ( GLenum attachment, GLenum texType,
GLuint texId, int mipLevel,
int zSlice )
{
if (texType == GL_TEXTURE_2D)
{
// Default is GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_ARB, or cube faces
CHECKGL ( glFramebufferTexture2DEXT ( GL_FRAMEBUFFER_EXT, attachment,
texType, texId, mipLevel ) );
}
else if (texType == GL_TEXTURE_1D)
{
CHECKGL ( glFramebufferTexture1DEXT ( GL_FRAMEBUFFER_EXT, attachment,
GL_TEXTURE_1D, texId, mipLevel ) );
}
else if (texType == GL_TEXTURE_3D)
{
CHECKGL ( glFramebufferTexture3DEXT ( GL_FRAMEBUFFER_EXT, attachment,
GL_TEXTURE_3D, texId, mipLevel, zSlice ) );
}
}
bool GLFramebufferObject::IsValid()
{
_GuardedBind();
bool isOK = false;
GLenum status;
status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
CHECKGL_MSG (glCheckFramebufferStatusEXT);
switch (status)
{
case GL_FRAMEBUFFER_COMPLETE_EXT: // Everything's OK
isOK = true;
break;
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT") );
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT") );
isOK = false;
break;
// See issue (87) of http://www.opengl.org/registry/specs/EXT/framebuffer_object.txt
// case GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT:
// nuxError(TEXT("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT"));
// isOK = false;
// break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT") );
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT") );
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT") );
isOK = false;
break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT") );
isOK = false;
break;
// case GL_FRAMEBUFFER_STATUS_ERROR_EXT:
// nuxError(TEXT("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_STATUS_ERROR_EXT"));
// isOK = false;
// break;
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
nuxError (TEXT ("[GLFramebufferObject::IsValid] GL_FRAMEBUFFER_UNSUPPORTED_EXT") );
isOK = false;
break;
default:
nuxError (TEXT ("[GLFramebufferObject::IsValid] Unknown ERROR") );
isOK = false;
}
_GuardedUnbind();
return isOK;
}
/// Accessors
GLenum GLFramebufferObject::GetAttachedType ( GLenum attachment )
{
// Returns GL_RENDERBUFFER_EXT or GL_TEXTURE
_GuardedBind();
GLint type = 0;
CHECKGL ( glGetFramebufferAttachmentParameterivEXT (GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT,
&type) );
_GuardedUnbind();
return GLenum (type);
}
GLuint GLFramebufferObject::GetAttachedId ( GLenum attachment )
{
_GuardedBind();
GLint id = 0;
CHECKGL ( glGetFramebufferAttachmentParameterivEXT (GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT,
&id) );
_GuardedUnbind();
return GLuint (id);
}
GLint GLFramebufferObject::GetAttachedMipLevel ( GLenum attachment )
{
_GuardedBind();
GLint level = 0;
CHECKGL ( glGetFramebufferAttachmentParameterivEXT (GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT,
&level) );
_GuardedUnbind();
return level;
}
GLint GLFramebufferObject::GetAttachedCubeFace ( GLenum attachment )
{
_GuardedBind();
GLint level = 0;
CHECKGL ( glGetFramebufferAttachmentParameterivEXT (GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT,
&level) );
_GuardedUnbind();
return level;
}
GLint GLFramebufferObject::GetAttachedZSlice ( GLenum attachment )
{
_GuardedBind();
GLint slice = 0;
CHECKGL ( glGetFramebufferAttachmentParameterivEXT (GL_FRAMEBUFFER_EXT, attachment,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT,
&slice) );
_GuardedUnbind();
return slice;
}
//////////////////////////////////////////////////////////////////////////
// GLRenderbuffer
//////////////////////////////////////////////////////////////////////////
GLRenderbuffer::GLRenderbuffer()
: m_bufId (0)
{
m_bufId = _CreateBufferId();
}
GLRenderbuffer::GLRenderbuffer (GLenum internalFormat, int width, int height)
: m_bufId (_CreateBufferId() )
{
Set (internalFormat, width, height);
}
GLRenderbuffer::~GLRenderbuffer()
{
CHECKGL ( glDeleteRenderbuffersEXT (1, &m_bufId) );
}
void GLRenderbuffer::Bind()
{
CHECKGL ( glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, m_bufId) );
}
void GLRenderbuffer::Unbind()
{
CHECKGL ( glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, 0) );
}
void GLRenderbuffer::Set (GLenum internalFormat, int width, int height)
{
int maxSize = GLRenderbuffer::GetMaxSize();
if (width > maxSize || height > maxSize )
{
std::cout << "GLRenderbuffer::GLRenderbuffer() ERROR: Size too big width=" << width << "height=" << height << "\n";
return;
}
// Guarded bind
GLint savedId = 0;
CHECKGL ( glGetIntegerv ( GL_RENDERBUFFER_BINDING_EXT, &savedId ) );
if (savedId != (GLint) m_bufId)
{
Bind();
}
// Allocate memory for renderBuffer
CHECKGL ( glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, internalFormat, width, height ) );
// Guarded unbind
if (savedId != (GLint) m_bufId)
{
Unbind();
}
}
GLuint GLRenderbuffer::GetId() const
{
return m_bufId;
}
GLint GLRenderbuffer::GetMaxSize()
{
GLint maxAttach = 0;
CHECKGL ( glGetIntegerv ( GL_MAX_RENDERBUFFER_SIZE_EXT, &maxAttach ) );
return maxAttach;
}
GLuint GLRenderbuffer::_CreateBufferId()
{
GLuint id = 0;
CHECKGL ( glGenRenderbuffersEXT (1, &id) );
return id;
}
}
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