structure changes
This commit is contained in:
gmueller
275
src/client/oglfont.cpp
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275
src/client/oglfont.cpp
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#include "oglfont.h"
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#ifdef _MSC_VER
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#define LEAN_AND_MEAN
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#include <windows.h>
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#endif
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#define GL_Y_FIX(f) (1 - (f))
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static void _compile(oglf_font_t *font) {
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int chr;
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font->base_list = glGenLists(OGLF_MAX_ASCII);
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glBindTexture(GL_TEXTURE_2D, font->fontTex);
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for (chr = 0; chr < OGLF_MAX_ASCII; chr++) {
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glNewList(font->base_list + chr - 1, GL_COMPILE);
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if (font->chars[chr].w) {
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glBegin(GL_QUADS);
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glTexCoord2f(
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(float) font->chars[chr].x / (float) font->w,
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(float) GL_Y_FIX((font->chars[chr].y+font->chars[chr].h) / (float) font->h));
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glVertex2d((float) font->chars[chr].x_ofs,
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(float) font->chars[chr].h + font->chars[chr].y_ofs);
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glTexCoord2f(
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(float) (font->chars[chr].x + font->chars[chr].w)
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/ (float) font->w,
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(float) GL_Y_FIX((font->chars[chr].y + font->chars[chr].h) / (float) font->h));
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glVertex2d((float) font->chars[chr].w + font->chars[chr].x_ofs,
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(float) font->chars[chr].h + font->chars[chr].y_ofs);
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glTexCoord2f((float) (font->chars[chr].x + font->chars[chr].w)
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/ (float) font->w,
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(float) GL_Y_FIX( font->chars[chr].y / (float) font->h));
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glVertex2d((float) font->chars[chr].w + font->chars[chr].x_ofs,
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(float) font->chars[chr].y_ofs);
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glTexCoord2f((float) font->chars[chr].x / (float) font->w,
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(float) GL_Y_FIX( font->chars[chr].y / (float) font->h));
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glVertex2d((float) font->chars[chr].x_ofs,
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(float) font->chars[chr].y_ofs);
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glEnd();
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glTranslatef((float) (font->chars[chr].x_advance
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), 0, 0);
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} else {
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// if char has no width, treat it like a space
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glTranslatef((float) font->base, 0, 0);
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}
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glEndList();
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}
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}
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static int _starts_with(const char *buffer, const char *text) {
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const char *text_ptr = text;
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const char *buffer_ptr = buffer;
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while (*text_ptr != 0) {
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if (*text_ptr != *buffer_ptr)
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return 0;
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text_ptr++;
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buffer_ptr++;
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}
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return 1;
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}
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static int _parse_line(oglf_font_t *font, char *buffer) {
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if (_starts_with(buffer, "common")) {
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int count = sscanf(buffer,
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"common lineHeight=%d base=%d scaleW=%d scaleH=%d pages=%d\n",
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&font->line_h, &font->base, &font->w, &font->h, &font->pages);
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if (count != 5)
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return 0;
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} else if (_starts_with(buffer, "char ")) {
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oglf_char_t temp_char;
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int id;
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int
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count =
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sscanf(
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buffer,
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"char id=%d x=%d y=%d width=%d height=%d xoffset=%d yoffset=%d xadvance=%d page=%d chnl=%*d\n",
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&id, &temp_char.x, &temp_char.y, &temp_char.w,
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&temp_char.h, &temp_char.x_ofs,
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&temp_char.y_ofs, &temp_char.x_advance,
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&temp_char.page);
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font->chars[id] = temp_char;
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if (count != 9)
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return 0;
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}
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return 1;
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}
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int oglf_load(oglf_font_t *font, const char *bmf_path, unsigned int texture) {
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FILE *file;
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char buffer[256];
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file = fopen(bmf_path, "r"); // could not open file for read
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if (file == 0)
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return 0;
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font->chars = (oglf_char_t *) malloc(OGLF_MAX_ASCII * sizeof(oglf_char_t));
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while (fgets(buffer, sizeof(buffer), file) != 0) {
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int result = _parse_line(font, buffer);
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if (result == 0)
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return 0;
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}
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fclose(file); // close the source file
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font->fontTex = texture;
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font->scale = 1.f;
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_compile(font);
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return 1;
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}
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// calculate the approx. width of a string of text
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// note: no kerning info is currently evaluated
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int oglf_width(oglf_font_t *font, const char *text) {
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int w, l, i;
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w = 0;
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l = strlen(text);
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for (i = 0; i < l; i++) {
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//w += font->chars[text[i]].w;
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w += font->chars[text[i]].x_advance;
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}
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return w;
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}
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// destroy the charset
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void oglf_destroy(oglf_font_t *font) {
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glDeleteLists(font->base_list, OGLF_MAX_ASCII);
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glDeleteTextures(1, &font->fontTex);
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free(font->chars);
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}
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/*
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void ogl___font_in(ogl_font *font);
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void bmf___font_in(ogl_font *font) {
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ogl___font_in(font);
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}
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*/
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void oglf_begin(oglf_font_t *font, int width, int height) {
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glPushAttrib(GL_LIST_BIT | GL_CURRENT_BIT | GL_ENABLE_BIT
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| GL_TRANSFORM_BIT);
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glDisable(GL_DEPTH_TEST);
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glDisable(GL_LIGHTING);
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glDisable(GL_CULL_FACE);
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//glNormal3f( 0.0, 0.0, 1.0);
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// set projection matrix
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glLoadIdentity();
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//int newheight = (_width / 16.0) * 9.0;
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glOrtho(0.0,
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(double)width,
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(double)height,
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0.0,
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-1.0,
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1.0);
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// prepare model matrix
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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glLoadIdentity();
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//glScalef(font->scale, font->scale, 1.f);
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glBindTexture(GL_TEXTURE_2D, font->fontTex);
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glEnable(GL_TEXTURE_2D);
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glAlphaFunc(GL_GEQUAL,0.1);
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glEnable(GL_ALPHA_TEST);
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}
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void oglf_print_l(oglf_font_t *font, float x, float y, const char *text, int l) {
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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glTranslatef(x, y, 0);
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glCallLists(l, GL_UNSIGNED_BYTE, text);
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glPopMatrix();
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}
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void oglf_end() {
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glPopAttrib();
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glMatrixMode(GL_PROJECTION);
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glPopMatrix();
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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}
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void oglf_print(oglf_font_t *font, float x, float y, const char *text) {
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oglf_print_l(font, x, y, text, strlen(text));
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}
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void oglf_printf(oglf_font_t *font, int x, int y, const char *fmt, ...) {
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char text[OGLF_MAX_LINE], *line_start, *c;
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float h;
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va_list ap;
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int row;
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if (strlen(fmt) == 0)
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return;
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va_start(ap, fmt);
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vsprintf(text, fmt, ap);
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va_end(ap);
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line_start = text;
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row = 0;
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h = font->h / .63f;
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NextL: c = strchr(line_start, '\n');
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if (c) {
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row++;
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oglf_print_l(font, (float) x, (float) (y - h * row), line_start, c
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- line_start);
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line_start = c + 1;
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goto NextL;
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}
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oglf_print_l(font, (float) x, (float) (y - h * row), line_start, strlen(
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line_start));
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}
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/*
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#define OGLF_CENTER_TEXT(rect, txtw, ofs) ((float)((rect[ofs+_W] - txtw - rect[ofs])/2 + rect[ofs]))
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// printf function which takes in account the alignment
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void ogl_printf_al(oglf_font_t *font, alignment align, GLuint *rect,
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const char *fmt, ...) {
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char text[BMF_MAX_LINE];
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va_list ap;
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if (!strlen(fmt))
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return;
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va_start(ap, fmt);
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vsprintf(text, fmt, ap);
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va_end(ap);
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switch (align) {
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case al_left:
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ogl_print(font, (float) rect[_X],
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OGLF_CENTER_TEXT(rect, font->line_h, _Y), text);
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break;
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case al_right:
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ogl_print(font, ((float) rect[_W] - ogl__width(font, text)),
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OGLF_CENTER_TEXT(rect, font->line_h, _Y), text);
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break;
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case al_center:
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ogl_print(font, OGLF_CENTER_TEXT(rect, ogl__width(font, text), _X),
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OGLF_CENTER_TEXT(rect, font->line_h, _Y), text);
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break;
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}
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}
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*/
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