ComputerGraphicsOpenGL/texture.cpp at main · hurst848/ComputerGraphicsOpenGL · GitHub

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#include "texture.h"

texture::texture()
{
	glGenTextures(1, &id);
	glBindTexture(GL_TEXTURE_2D, id);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 512, 512,
		0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glBindTexture(GL_TEXTURE_2D, 0);

	textureSize = glm::ivec2(512, 512);
}

texture::texture(glm::ivec2 _size)
{
	glGenTextures(1, &id);
	glBindTexture(GL_TEXTURE_2D, id);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, _size.x, _size.y,
		0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glBindTexture(GL_TEXTURE_2D, 0);

	textureSize = _size;
}

texture::texture(std::string _path)
{
	unsigned char* data = stbi_load(_path.c_str(), &textureSize.x, &textureSize.y, NULL, 4);
	if (!data) { throw std::exception(); }

	glGenTextures(1, &id);
	if (!id) { throw std::exception(); }
	glBindTexture(GL_TEXTURE_2D, id);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, textureSize.x, textureSize.y, 0, GL_RGBA,
		GL_UNSIGNED_BYTE, data);
	free(data);
	glGenerateMipmap(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE, 0);
}

glm::ivec2 texture::getSize()
{
	return textureSize;
}

GLuint texture::getId()
{
	return id;
}