44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
#include "texture.h"
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#include <stdio.h>
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void Texture::load_image(const char* file_name, const int format, const int internal_components) {
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if (image) {
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SDL_FreeSurface(image);
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glDeleteTextures(1, &texture);
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}
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image = SDL_LoadBMP(file_name);
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if (!image) {
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printf("Couldn't load %s.\n", file_name);
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} else {
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glGenTextures(1, &texture);
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glBindTexture(GL_TEXTURE_2D, texture);
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glTexImage2D(GL_TEXTURE_2D, 0, internal_components, image->w, image->h, 0, format, GL_UNSIGNED_BYTE, image->pixels);
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apply_filer();
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}
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}
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void Texture::apply_filer() {
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GLint param = GL_NEAREST;
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if (filter == TEXTURE_FILTER_LINEAR)
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param = GL_LINEAR;
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glBindTexture(GL_TEXTURE_2D, texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, param);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, param);
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}
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Texture::Texture() {
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filter = TEXTURE_FILTER_NEAREST;
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texture = 0;
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image = nullptr;
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}
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Texture::~Texture() {
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if (image) {
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SDL_FreeSurface(image);
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glDeleteTextures(1, &texture);
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}
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} |