76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include "Texture.h"
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#include <stb/stb_image.h>
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#include <iostream>
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Texture::Texture(const char* texturePath, uint8_t textureType) {
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this->texturePath = texturePath;
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this->textureType = textureType;
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stbi_set_flip_vertically_on_load(1);
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auto *textureBuffer = stbi_load(texturePath, &textureWidth, &textureHeight, &bitsPerPixel, STBI_rgb_alpha);
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// Push texture to grahics card;
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glGenTextures(1, &textureId);
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glBindTexture(GL_TEXTURE_2D, textureId);
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//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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if(textureBuffer) {
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, textureWidth, textureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, textureBuffer);
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//glGenerateMipmap(GL_TEXTURE_2D);
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} else {
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std::cout << "[Warning] Texture " << texturePath << " not found!" << std::endl;
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}
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stbi_image_free(textureBuffer);
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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Texture::~Texture() {
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glDeleteTextures(1, &textureId);
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}
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void Texture::bind(uint8_t textureUnit, ShaderProgram* shaderProgram, uint8_t textureTypeNum) {
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std::string uniformName = "texture_";
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switch(textureType) {
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case texture_diffuse:
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uniformName += "diffuse" + std::to_string(textureTypeNum);
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break;
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case texture_specular:
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uniformName += "specular" + std::to_string(textureTypeNum);
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break;
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case texture_height:
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uniformName += "height" + std::to_string(textureTypeNum);
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break;
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case texture_normal:
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uniformName += "normal" + std::to_string(textureTypeNum);
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break;
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}
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// Add u_material as we store textures in a struct
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uniformName = "u_material." + uniformName;
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shaderProgram->setUniform(uniformName.c_str(), textureUnit);
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glActiveTexture(GL_TEXTURE0 + textureUnit);
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glBindTexture(GL_TEXTURE_2D, textureId);
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}
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void Texture::unbind() {
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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