I am trying to load and draw an image using SDL_Image to OpenGL, but its just drawing a big blue box, not even where the coords are. My image is 256x16. It has worked before and the only thing I've changes is the way it loads the images.
Main code:
Image *img = graphics->loadImage("vital_bar.png");
graphics->beginScene();
graphics->drawImage( img, Rect( 0, 0, 256, 16 ), Rect( 10, 10, 0, 0 ) );
graphics->endScene();
SDL_Delay(3000);
Load:
Image *VideoDriver::loadImage( std::string filename )
{
SDL_Surface *tmp = IMG_Load( filename.c_str() );
GLuint texture;
if(tmp == NULL)
{
logger->write( "Faild to load image: %s", filename.c_str() );
return false;
}
else
{
SDL_SetColorKey( tmp, SDL_SRCCOLORKEY, SDL_MapRGB( tmp->format, 255, 128, 0 ));
if( ( tmp->w & (tmp->w - 1)) != 0 )
{
logger->write( "warning: %s's width is not a power of 2.", filename.c_str() );
}
if( (tmp->h & (tmp->h -1)) != 0 )
{
logger->write( "warning: %s's height is not a power of 2.", filename.c_str() );
}
glGenTextures( 1, &texture );
glBindTexture( GL_TEXTURE_2D, texture );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, 3, tmp->w, tmp->h, 0, GL_BGR, GL_UNSIGNED_BYTE, tmp->pixels );
mHeight = tmp->h;
mWidth = tmp->w;
Image *img = new Image( texture );
SDL_FreeSurface( tmp );
return img;
}
}
Image.h
#include "log.h"
#include <SDL_opengl.h>
extern Logger *logger;
class Image
{
public:
Image( GLuint texture );
GLuint getTexture();
int getWidth();
int getHeight();
private:
GLuint mTexture;
int mWidth, mHeight;
};
Drawing Code:
void VideoDriver::drawImage( Image *image, Rect &src, Rect &dest )
{
if(image == NULL)
return;
float texX1 = src.x / (float)image->getWidth();
float texY1 = src.y / (float)image->getHeight();
float texX2 = (src.x + src.width) / (float)image->getWidth();
float texY2 = (src.y + src.height) / (float)image->getHeight();
glBindTexture( GL_TEXTURE_2D, image->getTexture() );
glEnable( GL_TEXTURE_2D );
glBegin( GL_QUADS );
glTexCoord2f( texX1, texY1 );
glVertex3f( (float)dest.x , (float)dest.y, 0 );
glTexCoord2f( texX2, texY1 );
glVertex3f( (float)dest.x + (float)src.width, (float)dest.y, 0 );
glTexCoord2f( texX2, texY2 );
glVertex3f( (float)dest.x + (float)src.width, (float)dest.y + (float)src.height, 0 );
glTexCoord2f( texX1, texY2 );
glVertex3f( (float)dest.x, (float)dest.y + (float)src.height, 0 );
glEnd();
glDisable( GL_TEXTURE_2D );
}
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