我尝试了很多使用 SOIL 在 openGL 中加载和显示图像的示例。在运行下面的源代码时，它只显示一个没有图像的 wite quad。我试图打开一个名为：foto 的图像。我将图像文件放在程序的文件夹中。
bool* keyStates = new bool[256];
GLuint texture[0];
void resize(int height, int width) {
const float ar = (float) width / (float) height;
glViewport(0, 10, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-ar, ar, -1.0, 1.0, 2.0, 90.0);
//gluLookAt(0, 2, 0, -1, 1, -3, 0, 1, 0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity() ;
}
void keyOperations (void) {
if (!keyStates['a']) {}
}
static void Draw(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(0.0f,0.0f,-5.0f);
texture[0] = SOIL_load_OGL_texture // load an image file directly as a new OpenGL texture
(
"foto.png",
SOIL_LOAD_AUTO,
SOIL_CREATE_NEW_ID,
SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB | SOIL_FLAG_COMPRESS_TO_DXT
);
// allocate a texture name
glBindTexture(GL_TEXTURE_2D, texture[0]);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glEnd();
glutSwapBuffers();
}
void keyPressed (unsigned char key, int x, int y) {
keyStates[key] = false;
}
void keyUp (unsigned char key, int x, int y) {
keyStates[key] = true;
}
int main(int argc, char **argv)
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInit(&argc, argv);
glutInitWindowSize(600, 600);
glutCreateWindow("ugh fml");
glutReshapeFunc(resize);
glutDisplayFunc(Draw);
glutKeyboardFunc(keyPressed);
glutKeyboardUpFunc(keyUp);
/////////////////////////////////////
glEnable(GL_TEXTURE_2D);
glShadeModel(GL_SMOOTH);
glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glutMainLoop();
}