This repository has been archived on 2022-05-21. You can view files and clone it, but cannot push or open issues or pull requests.
LEFTONE/core/loshader/fog.c

132 lines
3.4 KiB
C
Raw Normal View History

#include "./fog.h"
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include "util/gleasy/buffer.h"
#include "util/gleasy/program.h"
#include "util/math/vector.h"
#include "util/memory/memory.h"
#include "core/locommon/position.h"
#include "./uniblock.h"
/* resources */
#include "anysrc/header.shader.h"
#include "anysrc/fog.vshader.h"
#include "anysrc/fog.fshader.h"
struct loshader_fog_drawer_t {
const loshader_fog_program_t* prog;
const loshader_uniblock_t* uniblock;
gleasy_buffer_uniform_t param;
};
#pragma pack(push, 1)
typedef struct {
float type;
float prev_type;
float transition;
float bounds_fog;
vec4_t bounds_pos;
vec2_t bounds_size;
} loshader_fog_drawer_internal_param_t;
_Static_assert(
sizeof(float)*10 ==
sizeof(loshader_fog_drawer_internal_param_t));
#pragma pack(pop)
#define LOSHADER_FOG_UNIBLOCK_INDEX 0
#define LOSHADER_FOG_PARAM_INDEX 1
#define LOSHADER_FOG_PRIMITIVE_COUNT 6
void loshader_fog_program_initialize(loshader_fog_program_t* prog) {
assert(prog != NULL);
*prog = gleasy_program_new(
loshader_header_shader_, sizeof(loshader_header_shader_),
loshader_fog_vshader_, sizeof(loshader_fog_vshader_),
loshader_fog_fshader_, sizeof(loshader_fog_fshader_));
const GLuint uniblock = glGetUniformBlockIndex(*prog, "uniblock");
assert(glGetError() == GL_NO_ERROR);
glUniformBlockBinding(*prog, uniblock, LOSHADER_FOG_UNIBLOCK_INDEX);
const GLuint param = glGetUniformBlockIndex(*prog, "param");
assert(glGetError() == GL_NO_ERROR);
glUniformBlockBinding(*prog, param, LOSHADER_FOG_PARAM_INDEX);
}
void loshader_fog_program_deinitialize(loshader_fog_program_t* prog) {
assert(prog != NULL);
glDeleteProgram(*prog);
}
loshader_fog_drawer_t* loshader_fog_drawer_new(
const loshader_fog_program_t* prog,
const loshader_uniblock_t* uniblock) {
assert(prog != NULL);
assert(uniblock != NULL);
loshader_fog_drawer_t* drawer = memory_new(sizeof(*drawer));
*drawer = (typeof(*drawer)) {
.prog = prog,
.uniblock = uniblock,
};
glGenBuffers(1, &drawer->param);
glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(loshader_fog_drawer_internal_param_t), NULL, GL_DYNAMIC_DRAW);
return drawer;
}
void loshader_fog_drawer_delete(loshader_fog_drawer_t* drawer) {
if (drawer == NULL) return;
glDeleteBuffers(1, &drawer->param);
memory_delete(drawer);
}
void loshader_fog_drawer_set_param(
loshader_fog_drawer_t* drawer,
const loshader_fog_drawer_param_t* param) {
assert(drawer != NULL);
assert(param != NULL);
const loshader_fog_drawer_internal_param_t p = {
.type = param->type,
.prev_type = param->prev_type,
.transition = param->transition,
.bounds_fog = param->bounds_fog,
.bounds_pos = vec4(
param->bounds_pos.chunk.x,
param->bounds_pos.chunk.y,
param->bounds_pos.fract.x,
param->bounds_pos.fract.y),
.bounds_size = param->bounds_size,
};
glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(p), &p);
}
void loshader_fog_drawer_draw(const loshader_fog_drawer_t* drawer) {
assert(drawer != NULL);
glUseProgram(*drawer->prog);
loshader_uniblock_bind(drawer->uniblock, LOSHADER_FOG_UNIBLOCK_INDEX);
glBindBufferBase(GL_UNIFORM_BUFFER,
LOSHADER_FOG_PARAM_INDEX, drawer->param);
glDrawArrays(GL_TRIANGLES, 0, LOSHADER_FOG_PRIMITIVE_COUNT);
}