pigine/rendering/wrapper/Texture.cpp

#include "rendering/wrapper/Texture.h"
#include "rendering/wrapper/GLWrapper.h"

Texture::Texture() : texture(0) {
    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, 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);
}

Texture::~Texture() {
    glDeleteTextures(1, &texture);
}

void Texture::setColors(int width, int height, const char* data, int channels) {
    glBindTexture(GL_TEXTURE_2D, texture);
    switch(channels) {
        case 1:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, data);
            break;
        case 2:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RG, width, height, 0, GL_RG, GL_UNSIGNED_BYTE, data);
            break;
        case 3:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
            break;
        case 4:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
            break;
    }
}

void Texture::bind() const {
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, texture);
}