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From Art Trevs, "Features of the patch are:

Browse Source 
- Implementation of integer textures as in EXT_texture_integer

- setBorderColor(Vec4) changed to setBorderColor(Vec4d) to pass double values
as border color. (Probably we have to provide an overloading function to
still support Vec4f ?)

- new method Texture::getInternalFormatType() added. Gives information if the
internal format normalized, float, signed integer or unsigned integer. Can
help people to write better code ;-)

"

Futher changes to this submission by Robert Osfield, changed the dirty mipmap
flag into a buffer_value<> vector to ensure safe handling of multiple contexts.
This commit is contained in:
Robert Osfield
2007-09-11 12:04:58 +00:00
parent 98763cc4c5
commit 5e83ae4821
22 changed files with 807 additions and 48 deletions
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55
src/osg/Texture2D.cpp
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@@ -193,13 +193,13 @@ void Texture2D::apply(State& state) const
if (textureObject->isAllocated())
{
//std::cout<<"Reusing texture object"<<std::endl;
//notify(NOTICE)<<"Reusing texture object"<<std::endl;
applyTexImage2D_subload(state,GL_TEXTURE_2D,image.get(),
_textureWidth, _textureHeight, _internalFormat, _numMipmapLevels);
}
else
{
//std::cout<<"Creating new texture object"<<std::endl;
//notify(NOTICE)<<"Creating new texture object"<<std::endl;
applyTexImage2D_load(state,GL_TEXTURE_2D,image.get(),
_textureWidth, _textureHeight, _numMipmapLevels);
@@ -250,14 +250,20 @@ void Texture2D::apply(State& state) const
{
glBindTexture( GL_TEXTURE_2D, 0 );
}
// if texture object is now valid and we have to allocate mipmap levels, then
if (textureObject != 0 && _texMipmapGenerationDirtyList[contextID])
{
generateMipmap(state);
}
}
void Texture2D::computeInternalFormat() const
{
if (_image.valid()) computeInternalFormatWithImage(*_image);
else computeInternalFormatType();
}
void Texture2D::copyTexImage2D(State& state, int x, int y, int width, int height )
{
const unsigned int contextID = state.getContextID();
@@ -386,3 +392,46 @@ void Texture2D::copyTexSubImage2D(State& state, int xoffset, int yoffset, int x,
copyTexImage2D(state,x,y,width,height);
}
}
void Texture2D::allocateMipmap(State& state) const
{
const unsigned int contextID = state.getContextID();
// get the texture object for the current contextID.
TextureObject* textureObject = getTextureObject(contextID);
if (textureObject && _textureWidth != 0 && _textureHeight != 0)
{
// bind texture
textureObject->bind();
// compute number of mipmap levels
int width = _textureWidth;
int height = _textureHeight;
int numMipmapLevels = 1 + (int)floor(log2(maximum(width, height)));
// we do not reallocate the level 0, since it was already allocated
width >>= 1;
height >>= 1;
for( GLsizei k = 1; k < numMipmapLevels && (width || height); k++)
{
if (width == 0)
width = 1;
if (height == 0)
height = 1;
glTexImage2D( GL_TEXTURE_2D, k, _internalFormat,
width, height, _borderWidth,
_sourceFormat ? _sourceFormat : _internalFormat,
_sourceType ? _sourceType : GL_UNSIGNED_BYTE, NULL);
width >>= 1;
height >>= 1;
}
// inform state that this texture is the current one bound.
state.haveAppliedTextureAttribute(state.getActiveTextureUnit(), this);
}
}