Can't get rid of gluBuild2DMipmaps (solved)

OpenGL OpenGL: Basic Coding
1

I’m using gluBuild2DMipmaps simply because glTexImage2D does not want to work. I tried everything. I followed this: http://www.opengl.org/wiki/Common_Mistakes

I have 24bpp .bmp in my windows form and load them this way:

GLuint texture[3];												// Storage For 3 Textures

void LoadGLTextures()											// Creates Textures From Bitmaps In The Resource File
{
	HBITMAP hBMP;												// Handle Of The Bitmap
	BITMAP	BMP;												// Bitmap Structure

	// The ID Of The 3 Bitmap Images We Want To Load From The Resource File
	byte	Texture[]={	IDB_FONT_NORMAL_1, IDB_FONT_LARGE_1 };

	glGenTextures(sizeof(Texture), &texture[0]);				// Generate 3 Textures (sizeof(Texture)=3 ID's)
	for (int loop=0; loop<sizeof(Texture); loop++)				// Loop Through All The ID's (Bitmap Images)
	{
		hBMP=(HBITMAP)LoadImage(GetModuleHandle(NULL),MAKEINTRESOURCE(Texture[loop]), IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION);
		if (hBMP)												// Does The Bitmap Exist?
		{														// If So...
			GetObject(hBMP,sizeof(BMP), &BMP);					// Get The Object
																// hBMP: Handle To Graphics Object
																// sizeof(BMP): Size Of Buffer For Object Information
																// Buffer For Object Information
			glPixelStorei(GL_UNPACK_ALIGNMENT,4);				// Pixel Storage Mode (Word Alignment / 4 Bytes)
			glBindTexture(GL_TEXTURE_2D, texture[loop]);		// Bind Our Texture
			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST); 
			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

			// Generate Mipmapped Texture (3 Bytes, Width, Height And Data From The BMP)
			gluBuild2DMipmaps(GL_TEXTURE_2D, 3, BMP.bmWidth, BMP.bmHeight, GL_BGR, GL_UNSIGNED_BYTE, BMP.bmBits);
			//glTexImage2D(GL_TEXTURE_2D,0,3,BMP.bmWidth,BMP.bmHeight,0,GL_BGR,GL_UNSIGNED_SHORT,BMP.bmBits);

			DeleteObject(hBMP);									// Delete The Bitmap Object
		}
	}
}

Help?

2

Nowadays, I believe it is preferrable to use glGenerateMipmapEXT(GL_TEXTURE_2D) instead to tell the driver/GPU to build MIPmaps.

However, let’s see how you were trying to populate the MIP levels of the texture via glTexImage2D. Then you won’t even need the MIPmap gen.

3

What do you mean “with does not want to work” exactly ?
Why do you want to do without gluBuild2DMipmaps, if you can not find a way to replace it ?
Did you check that bmWidth and bmHeight are within allowed bounds for your hardware ?
Do you check if your hardware accept NPOT textures ?

Read again the documentation about gluBuild2DMipmaps, to be sure to re-implement everything needed :
http://www.opengl.org/sdk/docs/man/xhtml/gluBuild2DMipmaps.xml

4

He does not need mipmap gen, as GL_NEAREST is already used for minification filter.

5

see below

6

Edit, I found it myself. It was this:

		glTexImage2D(GL_TEXTURE_2D,0,3,BMP.bmWidth,BMP.bmHeight,0,GL_BGR,GL_UNSIGNED_SHORT,BMP.bmBits);

To:

glTexImage2D(GL_TEXTURE_2D,0,3,BMP.bmWidth,BMP.bmHeight,0,GL_BGR,GL_UNSIGNED_BYTE,BMP.bmBits);

Sorry, for all the trouble. :frowning: