1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#ifndef MANDEL_H
# define MANDEL_H
# include <stdio.h>
# include <stdlib.h>
# include <stdbool.h>
# include <math.h>
# include <GL/glew.h>
# include <SDL2/SDL.h>
# include <assert.h>
#define SDL_CALL(x) do { \
SDL_ClearError(); \
x; \
error_check_sdl(#x, __FILE__, __LINE__); \
} while (0)
# define GL_CALL(x) do { \
error_clear_gl(); \
x; \
error_check_gl(#x, __FILE__, __LINE__); \
} while (0)
enum
{
KEY_UP = 0,
KEY_DOWN,
KEY_RIGHT,
KEY_LEFT,
KEY_INC_ITERATIONS,
KEY_DEC_ITERATIONS,
KEY_ZOOM_IN,
KEY_ZOOM_OUT,
};
typedef struct
{
uint8_t r;
uint8_t b;
uint8_t g;
} Color;
typedef struct
{
uint8_t h;
uint8_t s;
uint8_t l;
} ColorHSL;
typedef struct
{
double x;
double y;
} Point;
typedef struct
{
float position;
Color color;
} ControlPoint;
typedef struct
{
unsigned int id;
struct
{
int width;
int height;
int real_start;
int real_end;
int imag_start;
int imag_end;
int iterations;
int texture;
int smooth;
int samples;
} location;
} Shader;
typedef struct
{
SDL_Window *window;
SDL_GLContext context;
bool running;
int width;
int height;
unsigned int vertex_buf;
unsigned int vertex_array;
unsigned int texture;
Shader shader;
// Color *palette;
double real_start;
double real_end;
double imag_start;
double imag_end;
int iterations;
bool smooth;
float samples;
} State;
// mandelbrot.c
int mandelbrot(double ca, double cb, int iterations);
// state.c
bool state_init(State *state);
void state_quit(State *state);
void state_run(State *state);
// event.c
void event_handle(State *state);
// error.c
void error_check_sdl(const char *code, const char *filename, int line_num);
void error_clear_gl(void);
void error_check_gl(const char *code, const char *filename, int line_num);
// color.c
unsigned int color_texture_new(int iterations);
// shader.c
bool shader_init(Shader *shader);
void shader_set_uniforms(Shader *shader, State *state);
#endif
|
