texture.cpp

#include"Texture.h"

Texture::Texture(const char* image, GLenum texType, GLenum slot, GLenum format, GLenum pixelType)
{
	type = texType;
	int widthImg, heightImg, numColCh;

	stbi_set_flip_vertically_on_load(true);

	unsigned char* bytes = stbi_load(image, &widthImg, &heightImg, &numColCh, 4);

	glGenTextures(1, &ID);
	glActiveTexture(slot);
	glBindTexture(texType, ID);

	glTexParameteri(texType, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
	glTexParameteri(texType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameteri(texType, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameteri(texType, GL_TEXTURE_WRAP_T, GL_REPEAT);

	glTexImage2D(texType, 0, GL_RGBA, widthImg, heightImg, 0, format, pixelType, bytes);
	glGenerateMipmap(texType);

	stbi_image_free(bytes);
	glBindTexture(texType, 0);
}

void Texture::texUnit(Shader& shader, const char* uniform, GLuint unit){
	GLuint texUni = glGetUniformLocation(shader.ID, uniform);
	shader.Activate();
	glUniform1i(texUni, unit);
}

void Texture::Bind(){
	glBindTexture(type, ID);
}

void Texture::Unbind(){
	glBindTexture(type, 0);
}

void Texture::Delete(){
	glDeleteTextures(1, &ID);
}