void Texture2::Load(const std::string& filename, bool linear, bool mipmaps)
{
// bind texture
Bind();
// initialize DevIL
if(!devil_initialized) {
ilutRenderer(ILUT_OPENGL);
devil_initialized = true;
}
// create image
ILuint Id;
ilGenImages(1, &Id);
ilBindImage(Id);
// load image from file
bool success = ilLoadImage(filename.c_str()) == IL_TRUE;
if(!success) {
ilDeleteImages(1, &Id); // delete image
throw std::runtime_error("Failed to load image from file: '" + filename + "'");
}
width_ = ilGetInteger(IL_IMAGE_WIDTH);
height_ = ilGetInteger(IL_IMAGE_HEIGHT);
// set opengl parameters
Setup(linear, mipmaps);
// load current image into current OpenGL texture
success = ilutGLTexImage(0) == IL_TRUE;
if(mipmaps) {
// automagically
glGenerateMipmap(GL_TEXTURE_2D);
}
ilDeleteImages(1, &Id); // delete image
if(!success) {
throw std::string("Failed to load image into OpenGL");
}
}
// Modified from the ilut source file for GLBind
GLuint BindTexImageWithClampAndFilter(GLint ClampMode, GLint FilterMode)
{
GLuint TexID = 0;
glGenTextures(1, &TexID);
glBindTexture(GL_TEXTURE_2D, TexID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, ClampMode);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, ClampMode);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, FilterMode);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, FilterMode);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SWAP_BYTES, IL_FALSE);
if (!ilutGLTexImage(0))
{
glDeleteTextures(1, &TexID);
return 0;
}
return TexID;
}
ILboolean ilOgl::Upload(ilImage &Image, ILuint Level)
{
Image.Bind();
return ilutGLTexImage(Level);
}
void TransIcelandicExpress::redraw( void ) {
static tex_init = 0;
if (!tex_init) {
ilutRenderer( ILUT_OPENGL );
ilGenImages( 1, &ImageName );
ilBindImage( ImageName );
glEnable( GL_TEXTURE_2D );
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
if (!ilLoadImage( "ludum48.png" )) {
printf("Loading image failed\n");
}
gl_tex_id = ilutGLBindTexImage();
ilutGLTexImage( 0 );
tex_init = 1;
}
glBindTexture (GL_TEXTURE_2D, gl_tex_id );
glClearColor( 0.3f, 0.4f, 0.6f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
//glEnable( GL_CULL_FACE );
glEnable( GL_DEPTH_TEST );
// 3d part
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluPerspective( 60.0, 800.0/600.0, 0.05, 100.0 );
gluLookAt( player->pos[0]+cameraPos[0],
player->pos[1]+cameraPos[1]+c_PlayerHeight,
player->pos[2]+cameraPos[2],
player->pos[0],
player->pos[1]+ c_PlayerHeight,
player->pos[2],
0.0, 1.0, 0.0 );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
// apply some of the camera xform to the light just to make
// it more shiny
glPushMatrix();
float viewHead = atan2( cameraPos[2], cameraPos[0] );
glRotated( viewHead * SG_RADIANS_TO_DEGREES, 0.0f, 1.0f, 0.0f );
setupLights();
glPopMatrix();
draw3d();
// 2d part
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluOrtho2D( 0, 800, 0, 600 ) ;
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glDisable( GL_LIGHTING );
draw2d();
SDL_GL_SwapBuffers();
}
