First commit

src/canvas.h

@@ -0,0 +1,51 @@
+#pragma once
+
+#ifdef __EMSCRIPTEN__
+  #include <GLES3/gl3.h>
+#else
+  #include <glad/glad.h>
+#endif
+
+#include "resource/shader.h"
+#include <glm/ext/matrix_clip_space.hpp>
+#include <glm/ext/matrix_transform.hpp>
+#include <glm/glm.hpp>
+
+namespace game
+{
+  class Canvas
+  {
+    static constexpr float TEXTURE_VERTICES[] = {0, 0, 0.0f, 0.0f, 1, 0, 1.0f, 0.0f,
+                                                 1, 1, 1.0f, 1.0f, 0, 1, 0.0f, 1.0f};
+
+    static constexpr GLuint TEXTURE_INDICES[] = {0, 1, 2, 2, 3, 0};
+
+    static GLuint textureVAO;
+    static GLuint textureVBO;
+    static GLuint textureEBO;
+    static bool isStaticInit;
+
+  public:
+    GLuint fbo{};
+    GLuint rbo{};
+    GLuint texture{};
+
+    glm::vec2 size{};
+
+    bool isDefault{};
+
+    Canvas() = default;
+    Canvas(glm::vec2, bool isDefault = false);
+    ~Canvas();
+    glm::mat4 transform_get() const;
+    glm::mat4 view_get() const;
+    glm::mat4 projection_get() const;
+    void texture_render(resource::Shader&, GLuint, glm::mat4&, glm::vec4 = glm::vec4(1.0f), glm::vec3 = {},
+                        float* = (float*)TEXTURE_VERTICES) const;
+    void render(resource::Shader&, glm::mat4&, glm::vec4 = glm::vec4(1.0f), glm::vec3 = {}) const;
+    void bind() const;
+    void unbind() const;
+    void clear(glm::vec4 color = glm::vec4(0, 0, 0, 1)) const;
+    bool is_valid() const;
+  };
+}