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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 "NuxCore/NuxCore.h"
#include "GLResource.h"
#include "IOpenGLResource.h"
#include "GLShaderParameter.h"
#include "GLTextureStates.h"
#include "IOpenGLBaseTexture.h"
#include "IOpenGLSurface.h"
namespace nux
{
NUX_IMPLEMENT_OBJECT_TYPE(IOpenGLBaseTexture);
IOpenGLBaseTexture::IOpenGLBaseTexture(OpenGLResourceType ResourceType,
unsigned int Width,
unsigned int Height,
unsigned int Depth,
unsigned int NumMipLevel,
BitmapFormat PixelFormat, NUX_FILE_LINE_DECL)
: IOpenGLResource(ResourceType, NUX_FILE_LINE_PARAM)
, _IsPOT(false)
, _NumMipLevel(NumMipLevel)
, _PixelFormat(PixelFormat)
, _Width(Width)
, _Height(Height)
, _Depth(Depth)
, _RowMemoryAlignment(1)
{
// if ((GPixelFormats[PixelFormat].BlockBytes == 1) ||
// (GPixelFormats[PixelFormat].BlockBytes == 2) ||
// (GPixelFormats[PixelFormat].BlockBytes == 3))
// _RowMemoryAlignment = 1;
// else
// _RowMemoryAlignment = 4;
if (_ResourceType == RTTEXTURE)
_TextureStates.SetType(GL_TEXTURE_2D);
#ifndef NUX_OPENGLES_20
if (_ResourceType == RTTEXTURERECTANGLE)
_TextureStates.SetType(GL_TEXTURE_RECTANGLE_ARB);
if (_ResourceType == RTCUBETEXTURE)
_TextureStates.SetType(GL_TEXTURE_CUBE_MAP_ARB);
if (_ResourceType == RTVOLUMETEXTURE)
_TextureStates.SetType(GL_TEXTURE_3D);
if (_ResourceType == RTANIMATEDTEXTURE)
_TextureStates.SetType(GL_TEXTURE_RECTANGLE_ARB);
#endif
_RowMemoryAlignment = ImageSurface::GetMemAlignment(PixelFormat);
if (IsPowerOf2(Width) && IsPowerOf2(Height))
{
_IsPOT = true;
}
}
IOpenGLBaseTexture::~IOpenGLBaseTexture()
{
}
void IOpenGLBaseTexture::SetRenderStates()
{
if (_ResourceType == RTTEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_2D, _OpenGLID));
}
#ifndef NUX_OPENGLES_20
else if (_ResourceType == RTTEXTURERECTANGLE)
{
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _OpenGLID));
}
else if (_ResourceType == RTCUBETEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_CUBE_MAP, _OpenGLID));
}
else if (_ResourceType == RTVOLUMETEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_3D, _OpenGLID));
}
else if (_ResourceType == RTANIMATEDTEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _OpenGLID));
}
#endif
else
{
nuxError("[IOpenGLBaseTexture::SetRenderStates] Incorrect texture resource type.");
}
_TextureStates.SetRenderStates();
}
void IOpenGLBaseTexture::SetFiltering(unsigned int MinFilter, unsigned int MagFilter/*, unsigned int MIP = GL_NEAREST*/)
{
_TextureStates.SetFiltering(MinFilter, MagFilter);
}
void IOpenGLBaseTexture::SetWrap(unsigned int U, unsigned int V, unsigned int W)
{
_TextureStates.SetWrap(U, V, W);
}
void IOpenGLBaseTexture::SetLOD(float MinLod, float MaxLod)
{
_TextureStates.SetLOD(MinLod, MaxLod);
}
void IOpenGLBaseTexture::SetMipLevel(unsigned int MinMip, unsigned int MaxMip)
{
_TextureStates.SetMipLevel(MinMip, MaxMip);
}
void IOpenGLBaseTexture::SetBorderColor(float R, float G, float B, float A)
{
_TextureStates.SetBorderColor(R, G, B, A);
}
int IOpenGLBaseTexture::BindTexture()
{
if (_OpenGLID == 0)
{
CHECKGL(glBindTexture(GL_TEXTURE_2D, 0));
}
else if (_ResourceType == RTTEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_2D, _OpenGLID));
}
#ifndef NUX_OPENGLES_20
else if (_ResourceType == RTTEXTURERECTANGLE)
{
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _OpenGLID));
}
else if (_ResourceType == RTCUBETEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_CUBE_MAP, _OpenGLID));
}
else if (_ResourceType == RTVOLUMETEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_3D, _OpenGLID));
}
else if (_ResourceType == RTANIMATEDTEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _OpenGLID));
}
#endif
else
{
nuxError("[GpuDevice::BindTexture] Unknown texture type.");
return OGL_INVALID_TEXTURE;
}
_TextureStates.SetRenderStates();
return OGL_OK;
}
int IOpenGLBaseTexture::BindTextureToUnit(int TextureUnitIndex)
{
CHECKGL(glActiveTextureARB(TextureUnitIndex));
CHECKGL(glBindTexture(GL_TEXTURE_2D, 0));
#ifndef NUX_OPENGLES_20
CHECKGL(glBindTexture(GL_TEXTURE_3D, 0));
CHECKGL(glBindTexture(GL_TEXTURE_CUBE_MAP, 0));
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0));
CHECKGL(glDisable(GL_TEXTURE_2D));
CHECKGL(glDisable(GL_TEXTURE_3D));
CHECKGL(glDisable(GL_TEXTURE_RECTANGLE_ARB));
CHECKGL(glDisable(GL_TEXTURE_CUBE_MAP));
#endif
if (_ResourceType == RTTEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_2D, _OpenGLID));
#ifndef NUX_OPENGLES_20
CHECKGL(glEnable(GL_TEXTURE_2D));
#endif
}
#ifndef NUX_OPENGLES_20
else if (_ResourceType == RTTEXTURERECTANGLE)
{
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _OpenGLID));
CHECKGL(glEnable(GL_TEXTURE_RECTANGLE_ARB));
}
else if (_ResourceType == RTCUBETEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_CUBE_MAP, _OpenGLID));
CHECKGL(glEnable(GL_TEXTURE_CUBE_MAP));
}
else if (_ResourceType == RTVOLUMETEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_3D, _OpenGLID));
CHECKGL(glEnable(GL_TEXTURE_3D));
}
else if (_ResourceType == RTANIMATEDTEXTURE)
{
CHECKGL(glBindTexture(GL_TEXTURE_RECTANGLE_ARB, _OpenGLID));
CHECKGL(glEnable(GL_TEXTURE_RECTANGLE_ARB));
}
#endif
else
{
nuxError("[IOpenGLBaseTexture::BindTexture] unknown texture type.");
return OGL_ERROR;
}
_TextureStates.SetRenderStates();
return OGL_OK;
}
void IOpenGLBaseTexture::GetSurfaceLevel(int Level, ObjectPtr<IOpenGLSurface>& surface)
{
}
ObjectPtr<IOpenGLSurface> IOpenGLBaseTexture::GetSurfaceLevel(int Level)
{
return ObjectPtr<IOpenGLSurface> (0);
}
int IOpenGLBaseTexture::LockRect(int Level, SURFACE_LOCKED_RECT *pLockedRect, const SURFACE_RECT *pRect)
{
return 0;
}
int IOpenGLBaseTexture::UnlockRect(int Level)
{
return 0;
}
unsigned char* IOpenGLBaseTexture::GetSurfaceData(int level, int &width, int &height, int &stride)
{
// Make this call a pure virtual once it has been implemented for IOpenGLCubeTexture,
// IOpenGLVolumeTexture and IOpenGLAnimatedTexture.
width = 0;
height = 0;
stride = 0;
return 0;
}
int GetTextureSize(IOpenGLBaseTexture *pTexture)
{
GLint unpack_alignment = GPixelFormats[pTexture->_PixelFormat].RowMemoryAlignment;
unsigned int halfUnpack = Log2(unpack_alignment);
unsigned int TextureSize = 0;
if (
pTexture->_PixelFormat == BITFMT_DXT1 ||
pTexture->_PixelFormat == BITFMT_DXT2 ||
pTexture->_PixelFormat == BITFMT_DXT3 ||
pTexture->_PixelFormat == BITFMT_DXT4 ||
pTexture->_PixelFormat == BITFMT_DXT5)
{
for (int Level = 0; Level < pTexture->GetNumMipLevel(); Level++)
{
unsigned int Width = Max<unsigned int> (1, pTexture->_Width >> Level);
unsigned int Height = Max<unsigned int> (1, pTexture->_Height >> Level);
unsigned int WidthInBlocks = Max<unsigned int> ((Width + 3) / 4, 1); // round the width to the upper multiple of 4. DXT blocks are 4x4 texels.
unsigned int HeightInBlocks = Max<unsigned int> ((Height + 3) / 4, 1); // round the height to the upper multiple of 4. DXT blocks are 4x4 texels.
if (pTexture->_PixelFormat == BITFMT_DXT1)
{
TextureSize += WidthInBlocks * HeightInBlocks * 8;;
}
else
{
TextureSize += WidthInBlocks * HeightInBlocks * 16;
}
}
}
else
{
for (int Level = 0; Level < pTexture->GetNumMipLevel(); Level++)
{
unsigned int Width = Max<unsigned int> (1, pTexture->_Width >> Level);
unsigned int Height = Max<unsigned int> (1, pTexture->_Height >> Level);
unsigned int BytePerPixel = GPixelFormats[pTexture->_PixelFormat].BlockBytes;
unsigned int SlicePitch = (((Width * BytePerPixel + (unpack_alignment - 1)) >> (halfUnpack)) << (halfUnpack)) * Height;
TextureSize += SlicePitch;
}
}
if (pTexture->GetResourceType() == RTANIMATEDTEXTURE)
{
return TextureSize * pTexture->GetDepth();
}
return TextureSize;
}
void GetTextureDesc(IOpenGLBaseTexture *pTexture,
unsigned int Level,
TEXTURE_DESC *pDesc)
{
GLint unpack_alignment = GPixelFormats[pTexture->_PixelFormat].RowMemoryAlignment;
unsigned int halfUnpack = Log2(unpack_alignment);
unsigned int BytePerPixel = 0;
pDesc->PixelFormat = pTexture->_PixelFormat;
if ( /*pTexture->_Format == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||*/
pTexture->_PixelFormat == BITFMT_DXT1 ||
pTexture->_PixelFormat == BITFMT_DXT2 ||
pTexture->_PixelFormat == BITFMT_DXT3 ||
pTexture->_PixelFormat == BITFMT_DXT4 ||
pTexture->_PixelFormat == BITFMT_DXT5)
{
pDesc->Width = Max<unsigned int> (1, pTexture->_Width >> Level);
pDesc->Height = Max<unsigned int> (1, pTexture->_Height >> Level);
pDesc->WidthInBlocks = Max<unsigned int> ((pDesc->Width + 3) / 4, 1); // round the width to the upper multiple of 4. DXT blocks are 4x4 texels.
pDesc->HeightInBlocks = Max<unsigned int> ((pDesc->Height + 3) / 4, 1); // round the height to the upper multiple of 4. DXT blocks are 4x4 texels.
if ( /*pTexture->_Format == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||*/
pTexture->_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.
pDesc->RowPitch = pDesc->WidthInBlocks * 8;
pDesc->SlicePitch = pDesc->WidthInBlocks * pDesc->HeightInBlocks * 8;
pDesc->BitsPerPixel = 0; // compressed
pDesc->BytesPerBlock = 8;
}
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.
pDesc->RowPitch = pDesc->WidthInBlocks * 16;
pDesc->SlicePitch = pDesc->WidthInBlocks * pDesc->HeightInBlocks * 16;
pDesc->BitsPerPixel = 0; // compressed
pDesc->BytesPerBlock = 16;
}
}
else
{
pDesc->Width = Max<unsigned int> (1, pTexture->_Width >> Level);
pDesc->Height = Max<unsigned int> (1, pTexture->_Height >> Level);
pDesc->WidthInBlocks = pDesc->Width;
pDesc->HeightInBlocks = pDesc->Height;
BytePerPixel = GPixelFormats[pTexture->_PixelFormat].BlockBytes;
pDesc->BitsPerPixel = BytePerPixel * 8;
pDesc->BytesPerBlock = BytePerPixel; // a block is a 1x1 pixel ie. 1 pixel.
pDesc->RowPitch = (((pDesc->Width * BytePerPixel + (unpack_alignment - 1)) >> (halfUnpack)) << (halfUnpack));
pDesc->SlicePitch = (((pDesc->Width * BytePerPixel + (unpack_alignment - 1)) >> (halfUnpack)) << (halfUnpack)) * pDesc->Height;
}
}
}
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