rename engine to src

src/texture.h

@@ -0,0 +1,48 @@
+#pragma once
+#include "image.h"
+
+class Texture2D
+{
+    GLuint m_tex = 0;
+    int m_width = 0;
+    int m_height = 0;
+    GLint m_format = 0;
+    GLint m_iformat = 0;
+public:
+    bool has_mips = false;
+    bool create(int width, int height, GLint internal_format = GL_RGBA8, GLint format = GL_RGBA, const uint8_t* data = nullptr);
+    bool create(const ui::Image& img);
+    void assign(GLuint tex, int w = -1, int h = -1, GLuint internal_format = GL_RGBA8, GLuint format = GL_RGBA);
+    bool load(std::string filename);
+    bool load_file(std::string filename);
+    void destroy() { if (m_tex) LOG("TEX destroy %d", m_tex); glDeleteTextures(1, &m_tex); }
+    void bind() const { glBindTexture(GL_TEXTURE_2D, m_tex); }
+    void unbind() const { glBindTexture(GL_TEXTURE_2D, 0); }
+    void update(const uint8_t* data);
+    bool ready() const { return m_tex != 0; }
+    void create_mipmaps();
+    glm::vec2 size() const;
+};
+
+class Sampler
+{
+    GLuint id = 0;
+    GLint current_unit = 0;
+public:
+    bool create(GLint filter = GL_LINEAR, GLint wrap = GL_CLAMP_TO_EDGE);
+    void set(GLint filter = GL_LINEAR, GLint wrap = GL_CLAMP_TO_EDGE);
+    void set_filter(GLint filter_min, GLint filter_mag);
+    void bind(int unit);
+    void unbind();
+    bool ready() const { return id != 0; }
+};
+
+class TextureManager
+{
+public:
+    static std::map<uint16_t, Texture2D> m_textures;
+    static bool load(const char* path, bool generate_mipmpas = false);
+    static void assign(uint16_t id, GLuint tex, int w = -1, int h = -1, GLuint internal_format = GL_RGBA8, GLuint format = GL_RGBA);
+    static Texture2D& get(uint16_t id);
+    static void invalidate();
+};