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