bitmap_font.cpp

motion_blur using opengl

#include "bitmap_font.h"

Font::Font(char *file_name, int *error)					// Build Our Font Display List
{
	float	cx;											// Holds Our X Character Coord
	float	cy;											// Holds Our Y Character Coord
	*error = !LoadGLTextures(file_name, &number_texture);
	if(*error)return;

	base=glGenLists(256);								// Creating 256 Display Lists
	glBindTexture(GL_TEXTURE_2D, number_texture);		// Select Our Font Texture
	for (loop=0; loop<256; loop++)						// Loop Through All 256 Lists
	{
		cx=float(loop%16)/16.0f;						// X Position Of Current Character
		cy=float(loop/16)/16.0f;						// Y Position Of Current Character

		glNewList(base+loop,GL_COMPILE);				// Start Building A List
			glBegin(GL_QUADS);							// Use A Quad For Each Character
				glTexCoord2f(cx,1.0f-cy-0.0625f);		// Texture Coord (Bottom Left)
				glVertex2i(0,0);						// Vertex Coord (Bottom Left)
				glTexCoord2f(cx+0.0625f,1.0f-cy-0.0625f);	// Texture Coord (Bottom Right)
				glVertex2i(16,0);						// Vertex Coord (Bottom Right)
				glTexCoord2f(cx+0.0625f,1.0f-cy);		// Texture Coord (Top Right)
				glVertex2i(16,16);						// Vertex Coord (Top Right)
				glTexCoord2f(cx,1.0f-cy);				// Texture Coord (Top Left)
				glVertex2i(0,16);						// Vertex Coord (Top Left)
			glEnd();									// Done Building Our Quad (Character)
			glTranslatef(11,0,0);	//10,0,0			// Move To The Right Of The Character
		glEndList();									// Done Building The Display List
	}													// Loop Until All 256 Are Built
}

Font::~Font(GLvoid)									// Delete The Font From Memory
{
	glDeleteLists(base,256);							// Delete All 256 Display Lists
	glDeleteTextures( 1, &number_texture );
}

GLvoid Font::glPrint_xy(GLint x, GLint y, char *string, int set)	// Where The Printing Happens
{
	if (set>1)set=1;
	glBlendFunc(GL_SRC_ALPHA			,	GL_ONE_MINUS_SRC_COLOR);	// nastavenie mie歛nia farieb
//farba bodu = (p魐odn