OpenGL-learning/Texture.cpp at master · QianMang/OpenGL-learning · GitHub

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#include "Texture.h"


Texture::Texture()
{
	textureID = 0;
	width = 0;
	height = 0;
	bitDepth = 0;
	fileLocation = "";
}

Texture::Texture(const char * fileLoc)
{
	textureID = 0;
	width = 0;
	height = 0;
	bitDepth = 0;
	fileLocation = fileLoc;
}

bool Texture::LoadTexture()
{
	unsigned char *texData = stbi_load(fileLocation, &width, &height, &bitDepth, 0);
	if (!texData) {
		std::cout << "failed to find" << fileLocation << std::endl;
		return false;
	}
	glGenTextures(1, &textureID);
	glBindTexture(GL_TEXTURE_2D, textureID);

	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_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, texData);
	glGenerateMipmap(GL_TEXTURE_2D);

	glBindTexture(GL_TEXTURE_2D, 0);
	stbi_image_free(texData);

	return true;
}

bool Texture::LoadTextureA()
{
	unsigned char *texData = stbi_load(fileLocation, &width, &height, &bitDepth, 0);
	if (!texData) {
		std::cout << "failed to find" << fileLocation << std::endl;
		return false;
	}
	glGenTextures(1, &textureID);
	glBindTexture(GL_TEXTURE_2D,textureID);

	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_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, texData);
	glGenerateMipmap(GL_TEXTURE_2D);

	glBindTexture(GL_TEXTURE_2D, 0);
	stbi_image_free(texData);

	return true;
}

void Texture::UseTexture()
{
	glActiveTexture(GL_TEXTURE);
	glBindTexture(GL_TEXTURE_2D, textureID);
}


void Texture::ClearTexture()
{
	glDeleteTextures(1, &textureID);
	textureID = 0;
	width = 0;
	height = 0;
	bitDepth = 0;
	fileLocation = "";
}


Texture::~Texture()
{
	ClearTexture();
}