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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
#include "shader.h"
int honey_shader_mt_ref = LUA_NOREF;
void honey_setup_shader(lua_State* L)
{
honey_lua_element shader_elements[] = {
{ "new", HONEY_FUNCTION, { .function = honey_shader_new } },
{ "use", HONEY_FUNCTION, { .function = honey_shader_use } },
{ "set_int", HONEY_FUNCTION, { .function = honey_shader_set_int } },
{ "set_float", HONEY_FUNCTION, { .function = honey_shader_set_float } },
{ "set_vec3", HONEY_FUNCTION, { .function = honey_shader_set_vec3 } },
{ "set_vec4", HONEY_FUNCTION, { .function = honey_shader_set_vec4 } },
{ "set_mat3", HONEY_FUNCTION, { .function = honey_shader_set_mat3 } },
{ "set_mat4", HONEY_FUNCTION, { .function = honey_shader_set_mat4 } },
{ "delete", HONEY_FUNCTION, { .function = honey_shader_delete } },
};
honey_lua_create_table(L, shader_elements, 9);
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_new(lua_State* L)
{
char* vertex_shader_source, *fragment_shader_source;
honey_lua_parse_arguments
(L, 1,
2, HONEY_STRING, &vertex_shader_source, HONEY_STRING, &fragment_shader_source);
int success;
char error[1024];
int vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertex_shader, 1,
&vertex_shader_source, NULL);
glCompileShader(vertex_shader);
glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(vertex_shader, 1024, NULL, error);
honey_lua_throw_error(L, "error compiling vertex shader: %s",
error);
}
int fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragment_shader, 1,
&fragment_shader_source, NULL);
glCompileShader(fragment_shader);
glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(fragment_shader, 1024, NULL, error);
honey_lua_throw_error(L, "error compiling fragment shader: %s",
error);
}
int shader = glCreateProgram();
glAttachShader(shader, vertex_shader);
glAttachShader(shader, fragment_shader);
glLinkProgram(shader);
glGetShaderiv(shader, GL_LINK_STATUS, &success);
if (!success) {
glGetShaderInfoLog(shader, 1024, NULL, error);
honey_lua_throw_error(L, "error linking shader program: %s",
error);
}
glDeleteShader(vertex_shader);
glDeleteShader(fragment_shader);
lua_pushinteger(L, shader);
return 1;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_use(lua_State* L)
{
int shader;
honey_lua_parse_arguments
(L, 1,
1, HONEY_INTEGER, &shader);
glUseProgram(shader);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_set_int(lua_State* L)
{
int shader, value;
char* name;
honey_lua_parse_arguments
(L, 1,
3,
HONEY_INTEGER, &shader,
HONEY_STRING, &name,
HONEY_INTEGER, &value);
glUseProgram(shader);
unsigned int location = glGetUniformLocation(shader, name);
glUniform1i(location, value);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_set_float(lua_State* L)
{
int shader; char* name; float value;
honey_lua_parse_arguments
(L, 1, 3,
HONEY_INTEGER, &shader,
HONEY_STRING, &name,
HONEY_NUMBER, &value);
glUseProgram(shader);
unsigned int location = glGetUniformLocation(shader, name);
glUniform1f(location, value);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_set_vec3(lua_State* L)
{
int shader; char* name; float* array;
honey_lua_parse_arguments
(L, 1, 3,
HONEY_INTEGER, &shader,
HONEY_STRING, &name,
HONEY_USERDATA, &array);
unsigned int location;
float* array;
get_array(L, &location, &array);
glUniform3fv(location, 1, array);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_set_vec4(lua_State* L)
{
unsigned int location;
float* array;
get_array(L, &location, &array);
glUniform4fv(location, 1, array);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_set_mat3(lua_State* L)
{
unsigned int location;
float* array;
get_array(L, &location, &array);
glUniformMatrix3fv(location, 1, GL_FALSE, array);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_set_mat4(lua_State* L)
{
unsigned int location;
float* array;
get_array(L, &location, &array);
glUniformMatrix4fv(location, 1, GL_FALSE, array);
return 0;
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
int honey_shader_delete(lua_State* L)
{
if (!honey_lua_validate_types(L, 1, HONEY_INTEGER))
lua_error(L);
int shader = lua_tointeger(L, 1);
glDeleteProgram(shader);
return 0;
}
|
