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#include <stdio.h>
#include <stdbool.h>
#include "shader.h"
#include "mons_math/vec4.h"
#include "mons_math/vec3.h"
#include "mons_math/vec2.h"
#include "mons_math/mat4.h"
#include "hashmap.h"
#include <stdlib.h>
typedef enum mons_uniform_type {
MONS_UNIFORM_INT,
MONS_UNIFORM_FLOAT,
MONS_UNIFORM_VEC2,
MONS_UNIFORM_VEC3,
MONS_UNIFORM_VEC4,
MONS_UNIFORM_MAT4,
} mons_uniform_type;
typedef struct mons_uniform_m4 {
mons_mat4 matrix;
bool transpose;
} mons_uniform_m4;
typedef union mons_uniform_data {
int i;
float f;
mons_vec2 v2;
mons_vec3 v3;
mons_vec4 v4;
mons_uniform_m4 m4;
} mons_uniform_data;
typedef struct mons_uniform {
mons_uniform_type type;
mons_uniform_data data;
} mons_uniform;
static mons_hashmap *GLOBAL_UNIFORMS = NULL;
mons_hashmap *get_global_uniforms() {
if (GLOBAL_UNIFORMS == NULL) {
GLOBAL_UNIFORMS = malloc(sizeof(mons_hashmap));
*GLOBAL_UNIFORMS = mons_hashmap_new(sizeof(mons_uniform), 10);
}
return GLOBAL_UNIFORMS;
}
void mons_shader_apply_global_uniforms(mons_program shader) {
mons_hashmap *global_uniforms = get_global_uniforms();
for (int i = 0; i < global_uniforms->len; i++) {
mons_hashmap_pair pair;
mons_hashmap_at(*global_uniforms, i, &pair);
char *name = pair.key;
mons_uniform uniform = *(mons_uniform *)pair.value;
switch (uniform.type) {
case MONS_UNIFORM_INT:
// TODO:
break;
case MONS_UNIFORM_FLOAT:
mons_shader_set_float(shader, name, uniform.data.f);
break;
case MONS_UNIFORM_VEC2:
mons_shader_set_vec2(shader, name, uniform.data.v2);
break;
case MONS_UNIFORM_VEC3:
mons_shader_set_vec3(shader, name, uniform.data.v3);
break;
case MONS_UNIFORM_VEC4:
mons_shader_set_vec4(shader, name, uniform.data.v4);
break;
case MONS_UNIFORM_MAT4:
mons_shader_set_mat4(shader, name, uniform.data.m4.matrix, uniform.data.m4.transpose);
break;
}
}
}
void mons_shader_set_float_global(char *uniform_name, float value) {
mons_hashmap *global_uniforms = get_global_uniforms();
mons_uniform uniform = {
.type = MONS_UNIFORM_FLOAT,
.data.f = value,
};
mons_hashmap_insert(global_uniforms, uniform_name, &uniform);
}
void mons_shader_set_vec2_global(char *uniform_name, mons_vec2 value) {
mons_hashmap *global_uniforms = get_global_uniforms();
mons_uniform uniform = {
.type = MONS_UNIFORM_VEC2,
.data.v2 = value,
};
mons_hashmap_insert(global_uniforms, uniform_name, &uniform);
}
void mons_shader_set_vec3_global(char *uniform_name, mons_vec3 value) {
mons_hashmap *global_uniforms = get_global_uniforms();
mons_uniform uniform = {
.type = MONS_UNIFORM_VEC3,
.data.v3 = value,
};
mons_hashmap_insert(global_uniforms, uniform_name, &uniform);
}
void mons_shader_set_vec4_global(char *uniform_name, mons_vec4 value) {
mons_hashmap *global_uniforms = get_global_uniforms();
mons_uniform uniform = {
.type = MONS_UNIFORM_VEC4,
.data.v4 = value,
};
mons_hashmap_insert(global_uniforms, uniform_name, &uniform);
}
void mons_shader_set_mat4_global(char *uniform_name, mons_mat4 value, bool transpose) {
mons_hashmap *global_uniforms = get_global_uniforms();
mons_uniform uniform = {
.type = MONS_UNIFORM_MAT4,
.data.m4 = {
.matrix = value,
.transpose = transpose,
},
};
mons_hashmap_insert(global_uniforms, uniform_name, &uniform);
}
mons_shader mons_create_shader(mons_shader_type shader_type, char *source,
int source_length) {
unsigned int shader = glCreateShader(shader_type);
const char *shader_source = (const char *)source;
int shader_len = (int)source_length;
glShaderSource(shader, 1, &shader_source, &shader_len);
glCompileShader(shader);
int success;
char info_log[512];
glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
if (!success) {
glGetShaderInfoLog(shader, 512, NULL, info_log);
printf("Shader Compilation Failed: %s\n", info_log);
}
return shader;
}
mons_program mons_create_program(mons_shader vertex_shader,
mons_shader fragment_shader) {
unsigned int shader_program = glCreateProgram();
glAttachShader(shader_program, vertex_shader);
glAttachShader(shader_program, fragment_shader);
glLinkProgram(shader_program);
int success;
char info_log[512];
glGetProgramiv(shader_program, GL_LINK_STATUS, &success);
if (!success) {
glGetProgramInfoLog(shader_program, 512, NULL, info_log);
}
return shader_program;
}
void mons_shader_set_float(mons_program shader, char *uniform_name,
float value) {
glUniform1f(glGetUniformLocation(shader, uniform_name), value);
}
void mons_shader_set_vec2(mons_program shader, char *uniform_name,
mons_vec2 value) {
glUniform2fv(glGetUniformLocation(shader, uniform_name), 1,
(float *)&value);
}
void mons_shader_set_vec3(mons_program shader, char *uniform_name,
mons_vec3 value) {
glUniform3fv(glGetUniformLocation(shader, uniform_name), 1,
(float *)&value);
}
void mons_shader_set_vec4(mons_program shader, char *uniform_name,
mons_vec4 value) {
glUniform4fv(glGetUniformLocation(shader, uniform_name), 1,
(float *)&value);
}
void mons_shader_set_mat4(mons_program shader, char *uniform_name,
mons_mat4 value, bool transpose) {
glUniformMatrix4fv(glGetUniformLocation(shader, uniform_name), 1, transpose,
(float *)&value);
}
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