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- /*!
- * \file src/GLString.cpp
- * \brief Open GL rendering font/string class
- *
- * \author Mongoose
- * \author xythobuz
- */
-
- #include <string.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <stdarg.h>
-
- #ifdef __APPLE__
- #include <OpenGL/gl.h>
- #else
- #include <GL/gl.h>
- #endif
-
- #include "Texture.h"
- #include "GLString.h"
-
- GLString::GLString() {
- _num_string_max = 0;
- _num_string = 0;
- _scale = 1.0;
- _string = NULL;
- }
-
-
- GLString::~GLString() {
- if (_string) {
- for (unsigned int i = 0; i < _num_string; ++i) {
- if (_string[i].text)
- delete [] _string[i].text;
- }
- delete [] _string;
- }
- }
-
-
- void GLString::Init(unsigned int max_strings) {
- if (!max_strings)
- return;
-
- _num_string_max = max_strings;
- _string = new gl_string_t[max_strings];
- }
-
-
- void GLString::SetChar(unsigned int string, unsigned int pos, char c) {
- gl_string_t *str = GetString(string);
- if (str && pos < str->len)
- str->text[pos] = c;
- }
-
-
- unsigned int GLString::GetStringLen(unsigned int string) {
- gl_string_t *str = GetString(string);
- if (str)
- return str->len;
- return 0;
- }
-
-
- char *GLString::GetBuffer(unsigned int string) {
- gl_string_t *str = GetString(string);
- if (str)
- return str->text;
- return 0;
- }
-
-
- void GLString::setActive(unsigned int string, bool active) {
- gl_string_t *str = GetString(string);
- if (str)
- str->active = active;
- }
-
-
- void GLString::SetString(unsigned int string, const char *s, ...) {
- va_list args;
- gl_string_t *str;
-
- str = GetString(string);
-
- if (s && s[0] && str) {
- str->active = true;
-
- va_start(args, s);
- vsnprintf(str->text, str->len-2, s, args);
- str->text[str->len-1] = 0;
- va_end(args);
- }
- }
-
-
- void GLString::Scale(float scale) {
- _scale = scale;
- }
-
-
- int GLString::glPrintf(int x, int y, const char *string, ...) {
- int sz = 60;
- int n;
- va_list args;
-
-
- // Mongoose 2002.01.01, Only allow valid strings
- // we must assume it's NULL terminated also if it passes...
- if (!string || !string[0])
- return -1;
-
- if (_num_string > _num_string_max)
- return -2;
-
- // xythobuz 2014.02.23, Activate, so we don't have to call SetString
- // directly after glPrintf, with the same text...
- _string[_num_string].active = true;
-
- // Mongoose 2002.01.01, Assume no longer than 'sz' wide lines
- // on first try
- _string[_num_string].text = new char[sz];
-
- // Mongoose 2002.01.03, Setup scale factor
- _string[_num_string].scale = _scale;
-
- // Mongoose 2002.01.01, Setup position
- _string[_num_string].x = x;
- _string[_num_string].y = y;
-
- va_start(args, string);
-
- // Mongoose 2002.01.01, Get exact size needed if the first try fails
- n = vsnprintf(_string[_num_string].text, sz, string, args);
-
- // Mongoose 2002.01.01, Realloc correct amount if truncated
- while (1) {
- if (n > -1 && n < sz)
- break;
-
- if (n > -1) { // glibc 2.1
- sz = n + 1;
- delete [] _string[_num_string].text;
- _string[_num_string].text = new char[sz];
- n = vsnprintf(_string[_num_string].text, sz, string, args);
- break;
- } else { // glibc 2.0
- sz *= 2;
- delete [] _string[_num_string].text;
- _string[_num_string].text = new char[sz];
- n = vsnprintf(_string[_num_string].text, sz, string, args);
- }
- }
- va_end(args);
-
- // Mongoose 2002.01.04, Remeber string size, for future rebuffering use
- _string[_num_string].len = (unsigned short)sz;
-
- // Mongoose 2002.01.01, Incement string counter, since we just
- // allocated a string
- ++_num_string;
-
- return 0;
- }
-
-
- void GLString::Render() {
- for (unsigned int i = 0; i < _num_string; ++i) {
- if (_string[i].active)
- glPrint2d(_string[i].x, _string[i].y, _string[i].scale, _string[i].text);
- }
- }
-
-
- gl_string_t *GLString::GetString(unsigned int id) {
- if (id < _num_string)
- return _string + id;
- return NULL;
- }
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