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Totally reworked Texture::setData() using TypeTraits. 

Instead of large if() block for calling either glTexImage1D,
glTexImage2D or glTexImage3D the class now uses internal helper functor,
which should lead to shorter generated code and also prevent using
wrong dimension count.
vectorfields
Vladimír Vondruš 15 years ago
parent
1080c2900e
commit
b0ed6479df
1 changed files with 47 additions and 41 deletions
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  1. 88
      src/Texture.h

88
src/Texture.h
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@ -20,6 +20,7 @@
*/
#include "Magnum.h"
#include "TypeTraits.h"
namespace Magnum {
@ -226,54 +227,59 @@ template<size_t dimensions> class Texture {
* color channel is detected from format of passed data array.
* @param data Texture data.
*/
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLubyte* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_UNSIGNED_BYTE, data);
}
/** @copydoc setData() */
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLbyte* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_BYTE, data);
}
/** @copydoc setData() */
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLushort* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_UNSIGNED_SHORT, data);
}
/** @copydoc setData() */
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLshort* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_SHORT, data);
}
/** @copydoc setData() */
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLuint* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_UNSIGNED_INT, data);
template<class T> inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
bind();
DataHelper<typename TypeTraits<T>::TextureType, dimensions>()(target, mipLevel, internalFormat, _dimensions, colorFormat, data);
unbind();
}
/** @copydoc setData() */
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLint* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_INT, data);
}
/**
* @brief Helper for setting texture data
*
* Workaround for partial partial template specialization, see
* http://stackoverflow.com/questions/1757791/c-template-partial-specialization-specializing-one-member-function-only
*/
template<class T, size_t textureDimensions> struct DataHelper {
#ifdef DOXYGEN_GENERATING_OUTPUT
/**
* @brief Functor
* @param target Target, such as GL_TEXTURE_2D
* @param mipLevel Mip level
* @param internalFormat Internal texture format. One value from
* InternalFormat or ColorFormat enum.
* @param _dimensions Texture dimensions
* @param colorFormat Color format of passed data. Data size per
* color channel is detected from format of passed data array.
* @param data Texture data.
*
* Calls glTexImage1D, glTexImage2D, glTexImage3D depending on
* dimension count.
*/
inline void operator()(GLenum target, GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, 1>& _dimensions, ColorFormat colorFormat, const T* data);
#endif
};
/** @copydoc setData() */
inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, const GLfloat* data) {
setData(mipLevel, internalFormat, _dimensions, colorFormat, GL_FLOAT, data);
}
#ifndef DOXYGEN_GENERATING_OUTPUT
template<class T> struct DataHelper<T, 1> {
inline void operator()(GLenum target, GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, 1>& _dimensions, ColorFormat colorFormat, const T* data) {
glTexImage1D(target, mipLevel, internalFormat, _dimensions.at(0), 0, colorFormat, TypeTraits<T>::glType(), data);
}
};
template<class T> struct DataHelper<T, 2> {
inline void operator()(GLenum target, GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, 2>& _dimensions, ColorFormat colorFormat, const T* data) {
glTexImage2D(target, mipLevel, internalFormat, _dimensions.at(0), _dimensions.at(1), 0, colorFormat, TypeTraits<T>::glType(), data);
}
};
template<class T> struct DataHelper<T, 3> {
inline void operator()(GLenum target, GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, 3>& _dimensions, ColorFormat colorFormat, const T* data) {
glTexImage3D(target, mipLevel, internalFormat, _dimensions.at(0), _dimensions.at(1), _dimensions.at(2), 0, colorFormat, TypeTraits<T>::glType(), data);
}
};
#endif
private:
GLuint texture;
const GLenum target;
void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, dimensions>& _dimensions, ColorFormat colorFormat, GLenum pixelFormat, const GLvoid* data) {
bind();
if(dimensions == 1)
glTexImage1D(target, mipLevel, internalFormat, _dimensions.at(0), 0, colorFormat, pixelFormat, data);
else if(dimensions == 2)
glTexImage2D(target, mipLevel, internalFormat, _dimensions.at(0), _dimensions.at(1), 0, colorFormat, pixelFormat, data);
else if(dimensions == 3)
glTexImage3D(target, mipLevel, internalFormat, _dimensions.at(0), _dimensions.at(1), _dimensions.at(2), 0, colorFormat, pixelFormat, data);
unbind();
}
};
/** @brief One-dimensional texture */

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