66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
#include "Util.h"
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#include "stb_image.h"
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Util::Util()
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{
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}
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Util::~Util()
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{
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}
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GLuint Util::loadTexture(const std::string &filename)
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{
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int width, height, bpp;
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stbi_set_flip_vertically_on_load(true);
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unsigned char* imgData = stbi_load(filename.c_str(), &width, &height, &bpp, 4);
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GLuint num;
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glGenTextures(1, &num);
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glBindTexture(GL_TEXTURE_2D, num);
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glTexImage2D(GL_TEXTURE_2D,
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0, //level
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GL_RGBA, //internal format
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width, //width
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height, //height
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0, //border
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GL_RGBA, //data format
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GL_UNSIGNED_BYTE, //data type
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imgData); //data
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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stbi_image_free(imgData);
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return num;
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}
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void Util::glutBitmapString(std::string str, int x, int y)
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{
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glRasterPos2f(x, y);
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for (int i = 0; i < str.size(); i++)
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{
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glutBitmapCharacter(GLUT_BITMAP_HELVETICA_18, str[i]);
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}
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}
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int Util::glutTextWidth(const std::string str)
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{
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int total = 0;
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for (int i = 0; i < str.size(); i++)
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{
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total += glutBitmapWidth(GLUT_BITMAP_HELVETICA_18, str[i]);
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}
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return total;
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}
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//int Util::glutTextHeight()
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//{
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// return glutBitmapHeight(GLUT_BITMAP_HELVETICA_18);
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//}
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