Texture.cpp

#include "Texture.h"
#include "glad.h"
#include "stb_image.h"
Texture::Texture() {
	mWidth = 0;
	mHeight = 0;
	mChannels = 0;
	glGenTextures(1, &mHandle);
}
Texture::Texture(const char* path) {
	glGenTextures(1, &mHandle);
	Load(path);
}
Texture::~Texture() {
	glDeleteTextures(1, &mHandle);
}
void Texture::Load(const char* path) {
	glBindTexture(GL_TEXTURE_2D, mHandle);
	int width, height, channels;
	unsigned char* data = stbi_load(path, &width,
		&height,
		&channels, 4);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width,
		height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
	glGenerateMipmap(GL_TEXTURE_2D);
	stbi_image_free(data);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
		GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
		GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
		GL_NEAREST_MIPMAP_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
		GL_LINEAR);
	glBindTexture(GL_TEXTURE_2D, 0);
	mWidth = width;
	mHeight = height;
	mChannels = channels;
}
void Texture::Set(unsigned int uniformIndex,
	unsigned int textureIndex) {
	glActiveTexture(GL_TEXTURE0 + textureIndex);
	glBindTexture(GL_TEXTURE_2D, mHandle);
	glUniform1i(uniformIndex, textureIndex);
}
void Texture::UnSet(unsigned int textureIndex) {
	glActiveTexture(GL_TEXTURE0 + textureIndex);
	glBindTexture(GL_TEXTURE_2D, 0);
	glActiveTexture(GL_TEXTURE0);
}
unsigned int Texture::GetHandle() {
	return mHandle;
}