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LEFTONE/core/loshader/posteffect.c

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#include "./posteffect.h"
#include <assert.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <GL/glew.h>
#include "util/gleasy/buffer.h"
#include "util/gleasy/framebuffer.h"
#include "util/gleasy/program.h"
#include "util/math/vector.h"
#include "util/memory/memory.h"
#include "./uniblock.h"
/* resources */
#include "anysrc/header.shader.h"
#include "anysrc/posteffect.vshader.h"
#include "anysrc/posteffect.fshader.h"
#define LOSHADER_POSTEFFECT_UNIFORM_SRC 0
struct loshader_posteffect_drawer_t {
const loshader_posteffect_program_t* prog;
const loshader_uniblock_t* uniblock;
const gleasy_framebuffer_t* fb;
gleasy_buffer_uniform_t param;
};
#pragma pack(push, 1)
typedef struct {
float whole_blur;
float raster;
float radial_displacement;
float amnesia_displacement;
float radial_fade;
float brightness;
} loshader_posteffect_drawer_param_internal_t;
_Static_assert(
sizeof(float)*6 ==
sizeof(loshader_posteffect_drawer_param_internal_t));
#pragma pack(pop)
#define LOSHADER_POSTEFFECT_UNIBLOCK_INDEX 0
#define LOSHADER_POSTEFFECT_PARAM_INDEX 1
void loshader_posteffect_program_initialize(
loshader_posteffect_program_t* prog) {
assert(prog != NULL);
*prog = gleasy_program_new(
loshader_header_shader_, sizeof(loshader_header_shader_),
loshader_posteffect_vshader_, sizeof(loshader_posteffect_vshader_),
loshader_posteffect_fshader_, sizeof(loshader_posteffect_fshader_));
const GLuint uniblock = glGetUniformBlockIndex(*prog, "uniblock");
assert(glGetError() == GL_NO_ERROR);
glUniformBlockBinding(*prog, uniblock, LOSHADER_POSTEFFECT_UNIBLOCK_INDEX);
const GLuint param = glGetUniformBlockIndex(*prog, "param");
assert(glGetError() == GL_NO_ERROR);
glUniformBlockBinding(*prog, param, LOSHADER_POSTEFFECT_PARAM_INDEX);
}
void loshader_posteffect_program_deinitialize(
loshader_posteffect_program_t* prog) {
assert(prog != NULL);
glDeleteProgram(*prog);
}
loshader_posteffect_drawer_t* loshader_posteffect_drawer_new(
const loshader_posteffect_program_t* prog,
const loshader_uniblock_t* uniblock,
const gleasy_framebuffer_t* fb) {
assert(prog != NULL);
assert(uniblock != NULL);
assert(fb != NULL);
loshader_posteffect_drawer_t* drawer = memory_new(sizeof(*drawer));
*drawer = (typeof(*drawer)) {
.prog = prog,
.uniblock = uniblock,
.fb = fb,
};
glGenBuffers(1, &drawer->param);
glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(loshader_posteffect_drawer_param_internal_t),
NULL,
GL_DYNAMIC_DRAW);
return drawer;
}
void loshader_posteffect_drawer_delete(loshader_posteffect_drawer_t* drawer) {
if (drawer == NULL) return;
glDeleteBuffers(1, &drawer->param);
memory_delete(drawer);
}
void loshader_posteffect_drawer_set_param(
loshader_posteffect_drawer_t* drawer,
const loshader_posteffect_drawer_param_t* param) {
assert(drawer != NULL);
assert(param != NULL);
const loshader_posteffect_drawer_param_internal_t p = {
.whole_blur = param->whole_blur,
.raster = param->raster,
.radial_displacement = param->radial_displacement,
.amnesia_displacement = param->amnesia_displacement,
.radial_fade = param->radial_fade,
.brightness = param->brightness,
};
glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(p), &p);
}
void loshader_posteffect_drawer_draw(
const loshader_posteffect_drawer_t* drawer) {
assert(drawer != NULL);
glUseProgram(*drawer->prog);
loshader_uniblock_bind(drawer->uniblock, LOSHADER_POSTEFFECT_UNIBLOCK_INDEX);
glBindBufferBase(GL_UNIFORM_BUFFER,
LOSHADER_POSTEFFECT_PARAM_INDEX, drawer->param);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, drawer->fb->colorbuf);
glUniform1i(LOSHADER_POSTEFFECT_UNIFORM_SRC, 0);
glDrawArrays(GL_TRIANGLES, 0, 6);
}