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#include "texture.h"
#include "config.h"
#include <stdio.h>
#include <GL/gl.h>
#include <tqimage.h>
#include <tqgl.h>
#include <tdeglobal.h>
#include <tdeconfig.h>
#include <tqstring.h>
#include <kstandarddirs.h>
KueTexture::KueTexture(const TQString &filename)
{
_filename = filename;
_texture_id = 0;
if (filename.isNull())
{
// filename == TQString::null is an alias for the null texture
_loaded = true;
}
else
{
_loaded = false;
}
}
KueTexture::KueTexture(unsigned int texture_id)
{
_filename = TQString::null;
_texture_id = texture_id;
_loaded = true;
}
KueTexture::KueTexture(const KueTexture &t)
{
// Is the texture file backed?
if (t._filename.isNull())
{
// This is easy, copy over the texture id
_texture_id = t._texture_id;
_loaded = true;
}
else
{
// Yes, copy over the filename
_filename = t._filename;
_loaded = false;
}
}
KueTexture KueTexture::null() {
return KueTexture(0);
}
KueTexture::~KueTexture()
{
// We only "own" the texture ID if we were created from a filename
// Also check that we've allocated a valid texture ID. That means
// that the texture is loaded, and it's non-NULL.
// We don't use isNull(), because that forces a file load
if (_loaded && _texture_id && (!_filename.isNull()))
{
// Free a texture ID and its associated texture
glDeleteTextures(1, &_texture_id);
}
}
bool KueTexture::isNull()
{
load();
return (_texture_id == 0);
}
void KueTexture::load()
{
if (_loaded)
{
// The texture is already loaded, nothing to do here
return;
}
// Get the full pathname for the texture
TQImage raw_image, gl_image;
TQString fullname;
// Find the real filename
fullname = TDEGlobal::dirs()->findResource("appdata", "textures/" + _filename + ".png");
// Try to load the file
if (raw_image.load(fullname))
{
gl_image = TQGLWidget::convertToGLFormat(raw_image);
// Ask OpenGL for a new texture ID
glGenTextures(1, &_texture_id);
// Make it the current texture (blank right now)
glBindTexture(GL_TEXTURE_2D, _texture_id);
// Should we filter textures?
TDEGlobal::config()->setGroup("Graphics");
if (TDEGlobal::config()->readBoolEntry("Filter Textures", false))
{
// Yes, enable smooth scaling
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else
{
// No, enable fast scaling
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
// Load the image data in to the texture
glTexImage2D(GL_TEXTURE_2D, 0, 3, gl_image.width(), gl_image.height(), 0,
GL_RGBA, GL_UNSIGNED_BYTE, gl_image.bits());
}
else
{
// Unable to load image, use null texture
_texture_id = 0;
}
_loaded = true;
}
bool KueTexture::makeCurrent()
{
load();
// Sets the current 2D texture, where 0 means no texture
glBindTexture(GL_TEXTURE_2D, _texture_id);
return true;
}
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