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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 "GraphicsDisplay.h"
#include "GpuDevice.h"
#include "GLDeviceObjects.h"
#include "IOpenGLSurface.h"
namespace nux
{
NUX_IMPLEMENT_OBJECT_TYPE (IOpenGLSurface);
IOpenGLSurface::~IOpenGLSurface()
{
}
int IOpenGLSurface::RefCount() const
{
if (_BaseTexture)
return _BaseTexture->RefCount();
nuxAssert (0); // Surface with no underlying texture. That should not happen.
return 0;
}
int IOpenGLSurface::LockRect (
SURFACE_LOCKED_RECT *pLockedRect,
const SURFACE_RECT *pRect)
{
// If _LockedRect.pBits or _LockedRect.Pitch are not equal to zero, then we have already Locked the buffer
// Unlock it before locking again.
nuxAssert (_LockedRect.pBits == 0);
nuxAssert (_LockedRect.Pitch == 0);
nuxAssert (_CompressedDataSize == 0);
if ( (_LockedRect.pBits != 0) || (_LockedRect.Pitch != 0) || (_CompressedDataSize != 0) )
{
// already locked;
return OGL_INVALID_LOCK;
}
_Rect.bottom = _Rect.left = _Rect.right = _Rect.top = 0;
GLint unpack_alignment = GPixelFormats[_BaseTexture->_PixelFormat].RowMemoryAlignment;
unsigned int halfUnpack = Log2 (unpack_alignment);
CHECKGL ( glBindTexture (_STextureTarget, _BaseTexture->_OpenGLID) );
unsigned int surface_size = 0;
unsigned int BytePerPixel = 0;
IOpenGLBaseTexture *texture = _BaseTexture;
if (!((_BaseTexture->_ResourceType == RTTEXTURE) ||
(_BaseTexture->_ResourceType == RTTEXTURERECTANGLE) ||
(_BaseTexture->_ResourceType == RTCUBETEXTURE) ||
(_BaseTexture->_ResourceType == RTVOLUMETEXTURE) ||
(_BaseTexture->_ResourceType == RTANIMATEDTEXTURE)))
{
nuxAssertMsg (0, TEXT ("Unknown resource type") );
}
int texwidth, texheight;
texwidth = ImageSurface::GetLevelDim (texture->_PixelFormat, texture->_Width, _SMipLevel);
texheight = ImageSurface::GetLevelDim (texture->_PixelFormat, texture->_Height, _SMipLevel);
if ( texture->_PixelFormat == BITFMT_DXT1 ||
texture->_PixelFormat == BITFMT_DXT2 ||
texture->_PixelFormat == BITFMT_DXT3 ||
texture->_PixelFormat == BITFMT_DXT4 ||
texture->_PixelFormat == BITFMT_DXT5)
{
if (texture->_PixelFormat == BITFMT_DXT1)
{
// We can conceive a 4x4 DXT1 block as if each texel uses 4 bits.
// Actually, for DXT, we have 2 16-bits colors(5:6:5), and each texel uses 2 bits to interpolate
// between the 2 colors.
// ---------------------
// | COLOR0 | 16 bits
// ---------------------
// | COLOR1 | 16 bits
// ---------------------
// | xx | xx | xx | xx | xx = 2 bits
// ---------------------
// | xx | xx | xx | xx |
// ---------------------
// | xx | xx | xx | xx |
// ---------------------
// | xx | xx | xx | xx |
// ---------------------
// A line of n texel DXT1 data uses n/2 bytes (4 bits/texel). So the number of bytes used for a
// texwidth texel, is texwidth/2 bytes.
// Note that texwidth is divisible by 4(to to the upper rounding to 4), therefore, it is also divisible
// by 2.
// glCompressedTexImage2DARB, glCompressedTexImage3DARB,
// glCompressedTexSubImage2DARB, glCompressedTexSubImage3DARB are not affected by glPixelStorei.
surface_size = ImageSurface::GetLevelSize (texture->_PixelFormat, texture->_Width, texture->_Height, _SMipLevel);
_CompressedDataSize = surface_size;
_LockedRect.Pitch = ImageSurface::GetLevelPitch (texture->_PixelFormat, texture->_Width, texture->_Height, _SMipLevel);
if (_Initialized == false)
{
InitializeLevel();
}
}
else
{
// A line of n texel DXT3/5 data uses n bytes (1 byte/texel). So the number of bytes used for a
// texwidth texels, is texwidth bytes.
// glCompressedTexImage2DARB, glCompressedTexImage3DARB,
// glCompressedTexSubImage2DARB, glCompressedTexSubImage3DARB are not affected by glPixelStorei.
surface_size = ImageSurface::GetLevelSize (texture->_PixelFormat, texture->_Width, texture->_Height, _SMipLevel);
_CompressedDataSize = surface_size;
_LockedRect.Pitch = ImageSurface::GetLevelPitch (texture->_PixelFormat, texture->_Width, texture->_Height, _SMipLevel);
if (_Initialized == false)
{
InitializeLevel();
}
}
}
else
{
_LockedRect.Pitch = ImageSurface::GetLevelPitch (texture->_PixelFormat, texture->_Width, texture->_Height, _SMipLevel);
surface_size = ImageSurface::GetLevelSize (texture->_PixelFormat, texture->_Width, texture->_Height, _SMipLevel);
if (_Initialized == false)
{
InitializeLevel();
}
}
_Rect.left = 0;
_Rect.top = 0;
_Rect.bottom = texheight;
_Rect.right = texwidth;
if (GetGraphicsDisplay()->GetGpuDevice()->UsePixelBufferObjects() )
{
GetGraphicsDisplay()->GetGpuDevice()->AllocateUnpackPixelBufferIndex (&_AllocatedUnpackBuffer);
}
if (pRect == 0)
{
if (GetGraphicsDisplay()->GetGpuDevice()->UsePixelBufferObjects() )
{
// Mapping the entire area of the surface
_LockedRect.pBits = GetGraphicsDisplay()->GetGpuDevice()->LockUnpackPixelBufferIndex (_AllocatedUnpackBuffer, surface_size);
pLockedRect->pBits = _LockedRect.pBits;
pLockedRect->Pitch = _LockedRect.Pitch;
}
else
{
//[DEBUGGING - NO PBO]
// Mapping the entire area of the surface
_LockedRect.pBits = new BYTE[surface_size];
pLockedRect->pBits = _LockedRect.pBits;
pLockedRect->Pitch = _LockedRect.Pitch;
}
}
else
{
//[WARNING]
// this section of code is suppose to handle rectangles that are not the size of the entire surface.
// It works for uncompressed texture. However it hasn't been tested for compressed texture.
// reserve and lock a surface size equal to (RectWidth * RectHeight * BytePerPixel)
int RectWidth = pRect->right - pRect->left;
int RectHeight = pRect->bottom - pRect->top;
nuxAssert (RectWidth >= 0);
nuxAssert (RectHeight >= 0);
unsigned int RectSize = ( ( (RectWidth * BytePerPixel + (unpack_alignment - 1) ) >> (halfUnpack) ) << (halfUnpack) ) * RectHeight;
if (RectSize == 0)
{
pLockedRect->pBits = 0;
pLockedRect->Pitch = 0;
return OGL_INVALID_LOCK;
}
if (GetGraphicsDisplay()->GetGpuDevice()->UsePixelBufferObjects() )
{
_LockedRect.pBits = GetGraphicsDisplay()->GetGpuDevice()->LockUnpackPixelBufferIndex (_AllocatedUnpackBuffer, RectSize);
pLockedRect->pBits = ( (BYTE *) _LockedRect.pBits);
pLockedRect->Pitch = ( ( (RectWidth * BytePerPixel + (unpack_alignment - 1) ) >> (halfUnpack) ) << (halfUnpack) );
}
else
{
//[DEBUGGING - NO PBO]
_LockedRect.pBits = new BYTE[RectSize];
pLockedRect->pBits = ( (BYTE *) _LockedRect.pBits);
pLockedRect->Pitch = ( ( (RectWidth * BytePerPixel + (unpack_alignment - 1) ) >> (halfUnpack) ) << (halfUnpack) );
}
_Rect.left = pRect->left;
_Rect.top = pRect->top;
_Rect.bottom = pRect->bottom;
_Rect.right = pRect->right;
}
return OGL_OK;
}
int IOpenGLSurface::UnlockRect()
{
if (_LockedRect.pBits == 0)
{
return OGL_INVALID_UNLOCK;
}
CHECKGL ( glPixelStorei (GL_UNPACK_ALIGNMENT, _BaseTexture->GetFormatRowMemoryAlignment() ) );
BYTE *DataPtr = 0;
if (_STextureTarget == GL_TEXTURE_2D || _STextureTarget == GL_TEXTURE_RECTANGLE_ARB || _STextureTarget == GL_TEXTURE_CUBE_MAP || _STextureTarget == GL_TEXTURE_3D)
{
int w = _Rect.right - _Rect.left;
int h = _Rect.bottom - _Rect.top;
CHECKGL ( glBindTexture (_STextureTarget, _BaseTexture->_OpenGLID) );
if (GetGraphicsDisplay()->GetGpuDevice()->UsePixelBufferObjects() )
{
// Unmap the texture image buffer
GetGraphicsDisplay()->GetGpuDevice()->BindUnpackPixelBufferIndex (_AllocatedUnpackBuffer);
CHECKGL ( glUnmapBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB) );
DataPtr = NUX_BUFFER_OFFSET (0);
}
else
{
CHECKGL ( glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0) );
DataPtr = (BYTE *) _LockedRect.pBits;
}
IOpenGLTexture2D *texture = (IOpenGLTexture2D *) _BaseTexture;
if ( /*texture->_PixelFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||*/
texture->_PixelFormat == BITFMT_DXT1 ||
texture->_PixelFormat == BITFMT_DXT2 ||
texture->_PixelFormat == BITFMT_DXT3 ||
texture->_PixelFormat == BITFMT_DXT4 ||
texture->_PixelFormat == BITFMT_DXT5)
{
nuxAssert (_CompressedDataSize != 0);
int width = Max<int> (1, texture->_Width >> _SMipLevel);
int height = Max<int> (1, texture->_Height >> _SMipLevel);
int xoffset = _Rect.left;
int yoffset = _Rect.top;
if (_STextureTarget != GL_TEXTURE_3D)
{
glCompressedTexSubImage2DARB (_SSurfaceTarget,
_SMipLevel, // level
xoffset,
yoffset,
width,
height,
GPixelFormats[texture->_PixelFormat].PlatformFormat,
_CompressedDataSize, // image Size
DataPtr // data
);
CHECKGL_MSG (glCompressedTexSubImage2DARB);
}
else
{
glCompressedTexSubImage3DARB (_SSurfaceTarget,
_SMipLevel, // level
xoffset,
yoffset,
0,
width,
height,
_SSlice,
GPixelFormats[texture->_PixelFormat].PlatformFormat,
_CompressedDataSize, // image Size
DataPtr // data
);
CHECKGL_MSG (glCompressedTexSubImage3DARB);
}
// We can use glCompressedTexImage2DARB if we are sure we always lock
// the entire area of the surface.
// glCompressedTexImage2DARB(_SSurfaceTarget,
// _SMipLevel, // level
// texture->_Format,
// width,
// height,
// 0, // border
// _CompressedDataSize, // image Size
// _LockedRect.pBits // data
// );
// CHECKGL_MSG(glCompressedTexImage2DARB);
// { //[DEBUGGING - Red Texture]
// // This is going to put some red in the texture.
// // The texture is not compressed.
// BYTE *color_array = new BYTE[width*height*4];
// for(int i = 0; i < width*height*4; i += 4)
// {
// color_array[i + 0] = 0xff;
// color_array[i + 1] = _SMipLevel * 0x3F;
// color_array[i + 2] = 0x0;
// color_array[i + 3] = 0xFF;
// }
// glTexImage2D(GL_TEXTURE_2D,
// _SMipLevel,
// GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, color_array);
// CHECKGL_MSG(glTexImage2D);
// delete [] color_array;
// }
}
else
{
//CHECKGL( glPixelStorei(GL_UNPACK_ROW_LENGTH, w) );
if (_STextureTarget != GL_TEXTURE_3D)
{
CHECKGL ( glTexSubImage2D (_SSurfaceTarget,
_SMipLevel,
_Rect.left,
_Rect.top,
w,
h,
GPixelFormats[texture->_PixelFormat].Format,
GPixelFormats[texture->_PixelFormat].type,
DataPtr
) );
}
else
{
CHECKGL ( glTexSubImage3D (_SSurfaceTarget,
_SMipLevel,
_Rect.left,
_Rect.top,
_SSlice, // z offset
w,
h,
1,
GPixelFormats[texture->_PixelFormat].Format,
GPixelFormats[texture->_PixelFormat].type,
DataPtr
) );
}
//CHECKGL( glPixelStorei(GL_UNPACK_ROW_LENGTH, 0) );
// CHECKGL( glTexImage2D(_SSurfaceTarget,
// _SMipLevel,
// GPixelFormats[texture->_PixelFormat].PlatformFormat,
// w,
// h,
// 0,
// //### todo:
// // - find the correct format matching the internal format
// // - find the correct type matching the internal format
// GPixelFormats[texture->_PixelFormat].Format,
// GPixelFormats[texture->_PixelFormat].type,
// DataPtr
// ) );
}
}
else
{
nuxDebugMsg (TEXT("[IOpenGLSurface::UnlockRect] Incorrect Texture Target."));
}
if (GetGraphicsDisplay()->GetGpuDevice()->UsePixelBufferObjects() )
{
CHECKGL ( glBindBufferARB (GL_PIXEL_UNPACK_BUFFER_ARB, 0) );
GetGraphicsDisplay()->GetGpuDevice()->FreeUnpackPixelBufferIndex (_AllocatedUnpackBuffer);
}
else
{
//[DEBUGGING - NO PBO]
if (_LockedRect.pBits)
{
delete [] ( (BYTE *) _LockedRect.pBits);
}
}
CHECKGL ( glPixelStorei (GL_UNPACK_ALIGNMENT, GetGraphicsDisplay()->GetGpuDevice()->GetPixelStoreAlignment() ) );
_LockedRect.pBits = 0;
_LockedRect.Pitch = 0;
_CompressedDataSize = 0;
return OGL_OK;
}
int IOpenGLSurface::InitializeLevel()
{
// Because we use SubImage when unlocking surfaces, we must first get some dummy data in the surface before we can make a lock.
int texwidth = ImageSurface::GetLevelWidth (_BaseTexture->_PixelFormat, _BaseTexture->_Width, _SMipLevel);
int texheight = ImageSurface::GetLevelHeight (_BaseTexture->_PixelFormat, _BaseTexture->_Height, _SMipLevel);
int size = ImageSurface::GetLevelSize (_BaseTexture->_PixelFormat, _BaseTexture->_Width, _BaseTexture->_Height, _SMipLevel);
int MemAlignment = ImageSurface::GetMemAlignment (_BaseTexture->_PixelFormat);
nuxAssert ( texwidth > 0 ); // Should never happen
nuxAssert ( texheight > 0 ); // Should never happen
nuxAssert ( size > 0 ); // Should never happen
BYTE *DummyBuffer = new BYTE[size];
Memset (DummyBuffer, 0, size);
CHECKGL ( glPixelStorei (GL_UNPACK_ALIGNMENT, MemAlignment) );
if ( _BaseTexture->_PixelFormat == BITFMT_DXT1 ||
_BaseTexture->_PixelFormat == BITFMT_DXT2 ||
_BaseTexture->_PixelFormat == BITFMT_DXT3 ||
_BaseTexture->_PixelFormat == BITFMT_DXT4 ||
_BaseTexture->_PixelFormat == BITFMT_DXT5)
{
if (_STextureTarget != GL_TEXTURE_3D)
{
glCompressedTexImage2DARB (
_SSurfaceTarget,
_SMipLevel, // level
GPixelFormats[_BaseTexture->_PixelFormat].PlatformFormat,
texwidth,
texheight,
0, // border
size, // image Size
DummyBuffer // data
);
CHECKGL_MSG (glCompressedTexImage2DARB);
}
else
{
// glCompressedTexImage3DARB(
// _SSurfaceTarget,
// _SMipLevel, // level
// GPixelFormats[_BaseTexture->_PixelFormat].PlatformFormat,
// texwidth,
// texheight,
// _SSlice,
// 0, // border
// size, // image Size
// DummyBuffer // data
// );
// CHECKGL_MSG(glCompressedTexImage3DARB);
}
}
else
{
if (_STextureTarget != GL_TEXTURE_3D)
{
glTexImage2D (
_SSurfaceTarget,
_SMipLevel, // level
GPixelFormats[_BaseTexture->_PixelFormat].PlatformFormat,
texwidth,
texheight,
0, // border
GPixelFormats[_BaseTexture->_PixelFormat].Format,
GPixelFormats[_BaseTexture->_PixelFormat].type,
DummyBuffer);
CHECKGL_MSG (glTexImage2D);
}
else
{
// glTexImage3D(
// _SSurfaceTarget,
// _SMipLevel, // level
// GPixelFormats[PixelFormat].PlatformFormat,
// texwidth,
// texheight,
// _SSlice,
// 0, // border
// GPixelFormats[PixelFormat].Format,
// GPixelFormats[PixelFormat].type,
// DummyBuffer);
// CHECKGL_MSG(glTexImage3D);
}
}
delete [] DummyBuffer;
// { //[DEBUGGING - Red Texture]
// // This is going to put some red in the texture.
// // The texture is not compressed.
// BYTE *color_array = new BYTE[texwidth*texheight*4];
// for(unsigned int i = 0; i < texwidth*texheight*4; i += 4)
// {
// color_array[i + 0] = 0xff;
// color_array[i + 1] = _SMipLevel * 0x3F;
// color_array[i + 2] = 0x0;
// color_array[i + 3] = 0xFF;
// }
// glTexImage2D(GL_TEXTURE_2D,
// _SMipLevel,
// GL_RGBA8, texwidth, texheight, 0, GL_RGBA, GL_UNSIGNED_BYTE, color_array);
// CHECKGL_MSG(glTexImage2D);
// delete [] color_array;
// }
CHECKGL (glPixelStorei (GL_UNPACK_ALIGNMENT, GetGraphicsDisplay()->GetGpuDevice()->GetPixelStoreAlignment()));
_Initialized = true;
return OGL_OK;
}
void IOpenGLSurface::CopyRenderTarget (int x, int y, int width, int height)
{
CHECKGL (glPixelStorei (GL_UNPACK_ALIGNMENT, _BaseTexture->GetFormatRowMemoryAlignment ()));
if (_STextureTarget == GL_TEXTURE_2D || _STextureTarget == GL_TEXTURE_RECTANGLE_ARB || _STextureTarget == GL_TEXTURE_CUBE_MAP || _STextureTarget == GL_TEXTURE_3D)
{
CHECKGL ( glBindTexture (_STextureTarget, _BaseTexture->_OpenGLID) );
#ifndef NUX_OPENGLES_20
if (_STextureTarget != GL_TEXTURE_3D)
{
CHECKGL (glCopyTexImage2D (_SSurfaceTarget,
_SMipLevel,
GPixelFormats [_BaseTexture->_PixelFormat].Format,
x,
y,
width,
height,
0));
}
else
{
CHECKGL (glCopyTexSubImage3D (_SSurfaceTarget,
_SMipLevel,
0,
0,
0,
x,
y,
width,
height));
}
#else
if (_STextureTarget != GL_TEXTURE_3D)
{
CHECKGL (glCopyTexImage2D (_SSurfaceTarget,
_SMipLevel,
GPixelFormats [texture->_PixelFormat].Format,
x,
y,
width,
height,
0));
}
#endif
}
}
void* IOpenGLSurface::GetSurfaceData (int &width, int &height, int &format)
{
width = 0;
height = 0;
format = BITFMT_UNKNOWN;
// Because we use SubImage when unlocking surfaces, we must first get some dummy data in the surface before we can make a lock.
int texwidth = ImageSurface::GetLevelWidth (_BaseTexture->_PixelFormat, _BaseTexture->_Width, _SMipLevel);
int texheight = ImageSurface::GetLevelHeight (_BaseTexture->_PixelFormat, _BaseTexture->_Height, _SMipLevel);
nuxAssert (texwidth > 0); // Should never happen
nuxAssert (texheight > 0); // Should never happen
CHECKGL (glBindTexture (_STextureTarget, _BaseTexture->_OpenGLID));
CHECKGL (glPixelStorei (GL_PACK_ALIGNMENT, 1));
int size = texwidth * texheight * 4; // assume a memory alignment of 1
unsigned char *img = new unsigned char [size];
CHECKGL (glGetTexImage (_STextureTarget, _SMipLevel, GL_RGBA, GL_UNSIGNED_BYTE, img));
width = _BaseTexture->_Width;
height = _BaseTexture->_Height;
format = BITFMT_R8G8B8A8;
return img;
}
}
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