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#pragma once
#define GL3_PROTOTYPES 1
#include <GL/glew.h>
#include <SDL2/SDL.h>
#include <string>
#include <thread>
#include "shader.h"
#include "fonts.h"
#include <functional>
#include <glm/vec3.hpp>
#include "scancodes.h"
#include "texture.h"
#include "AudioManager.h"
#define SGG_CHECK_GL() do {GLenum err;while((err = glGetError()) != GL_NO_ERROR){ printf("Error %s %d\n", (const char*)glewGetErrorString(err), err);exit(0);}printf("Pass\n");} while(0);
constexpr auto CURVE_SUBDIVS = 64;
//#undef main
namespace graphics
{
void PrintSDL_GL_Attributes();
void CheckSDLError(int line);
class GLBackend
{
protected:
int m_width,
m_height;
std::string m_title;
SDL_Window * m_window;
uint32_t m_windowID;
SDL_GLContext m_context;
bool m_initialized = false;
FontLib m_fontlib;
SDL_TimerID m_idle_timer;
glm::vec3 m_back_color = { 0.0f, 0.0f, 0.0f };
glm::ivec2 m_mouse_pos = glm::ivec2();
glm::ivec2 m_prev_mouse_pos = glm::ivec2();
bool m_button_state[3] = { 0, 0, 0 };
bool m_button_pressed[3] = { 0, 0, 0 };
bool m_button_released[3] = { 0, 0, 0 };
bool m_mouse_dragging = false;
glm::vec4 m_requested_canvas = glm::vec4(0.0f);
glm::vec4 m_canvas;
int m_canvas_mode = 0;
glm::mat4 m_projection;
glm::mat4 m_transformation = glm::mat4(1.0f);
float m_orientation = 0.0f;
glm::vec3 m_scale = glm::vec3(1.0f);
Shader m_flat_shader;
GLuint m_rect_vbo;
GLuint m_rect_vao;
GLuint m_rect_outline_vbo;
GLuint m_rect_outline_vao;
GLuint m_line_vbo;
GLuint m_line_vao;
GLuint m_sector_vbo;
GLuint m_sector_vao;
GLuint m_sector_outline_vbo;
GLuint m_sector_outline_vao;
glm::vec4 m_window_to_canvas_factors;
AudioManager * m_audio = nullptr;
TextureManager textures;
std::chrono::time_point<std::chrono::steady_clock> m_prev_time_tick;
float m_global_time = 0.0f;
float m_delta_time = 0.0f;
const void* m_user_data = nullptr;
bool processEvent(SDL_Event event);
void advanceTime();
void computeProjection();
void initPrimitives();
void computeTransformation();
std::function<void()> m_draw_callback = nullptr;
std::function<void(float ms)> m_idle_callback = nullptr;
std::function<void(int w, int h)> m_resize_callback = nullptr;
public:
void drawRect(float cx, float cy, float w, float h, const struct Brush & brush);
void drawLine(float x_1, float y_1, float x_2, float y_2, const struct Brush & brush);
void drawSector(float cx, float cy, float start_angle, float end_angle, float radius1, float radius2, const struct Brush & brush);
void drawText(float pos_x, float pos_y, float size, const std::string & text, const Brush & brush);
void setUserData(const void* user_data);
void* getUserData();
void setScale(float sx, float sy, float sz);
void setOrientation(float degrees);
void resetPose();
bool setFont(std::string fontname);
bool getKeyState(scancode_t key);
void setDrawCallback(std::function<void()> drf);
void setIdleCallback(std::function<void(float ms)> idf);
void setResizeCallback(std::function<void(int w, int h)> rsf);
virtual bool init();
GLBackend(int w = 800, int h = 600, std::string title = "");
virtual void cleanup();
void swap();
bool processMessages();
virtual void update(float delta_time = 0.0f);
virtual void resize(int w, int h);
float WindowToCanvasX(float x, bool clamped = true);
float WindowToCanvasY(float y, bool clamped = true);
virtual void draw();
virtual ~GLBackend();
void makeCurrent();
void show(bool s);
void setBackgroundColor(float r, float g, float b);
float getDeltaTime();
float getGlobalTime();
void getMouseButtonPressed(bool * button_array);
void getMouseButtonReleased(bool * button_array);
void getMouseButtonState(bool * button_array);
void getMousePosition(int * x, int * y);
void getPrevMousePosition(int * x, int * y);
bool isMouseDragging();
void setCanvasMode(int m);
void setCanvasSize(float w, float h);
void setFullscreen(bool fs);
void playSound(std::string soundfile, float volume, bool looping = false);
void playMusic(std::string soundfile, float volume, bool looping = true, int fade_time = 0);
void stopMusic(int fade_time = 0);
};
}
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