110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
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#include "./pixsort.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/framebuffer.h"
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#include "util/gleasy/program.h"
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#include "util/math/algorithm.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/pixsort.vshader.h"
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#include "anysrc/pixsort.fshader.h"
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#define LOSHADER_PIXSORT_UNIFORM_SRC 0
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#define LOSHADER_PIXSORT_UNIFORM_INTENSITY 1
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#define LOSHADER_PIXSORT_UNIBLOCK_INDEX 0
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struct loshader_pixsort_drawer_t {
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const loshader_pixsort_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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float intensity;
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};
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void loshader_pixsort_program_initialize(
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loshader_pixsort_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_pixsort_vshader_, sizeof(loshader_pixsort_vshader_),
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loshader_pixsort_fshader_, sizeof(loshader_pixsort_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_PIXSORT_UNIBLOCK_INDEX);
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}
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void loshader_pixsort_program_deinitialize(
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loshader_pixsort_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_pixsort_drawer_t* loshader_pixsort_drawer_new(
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const loshader_pixsort_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_pixsort_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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return drawer;
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}
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void loshader_pixsort_drawer_delete(loshader_pixsort_drawer_t* drawer) {
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if (drawer == NULL) return;
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memory_delete(drawer);
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}
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void loshader_pixsort_drawer_set_intensity(
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loshader_pixsort_drawer_t* drawer,
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float intensity) {
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assert(drawer != NULL);
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assert(MATH_FLOAT_VALID(intensity));
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drawer->intensity = intensity;
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}
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void loshader_pixsort_drawer_draw(
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const loshader_pixsort_drawer_t* drawer) {
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assert(drawer != NULL);
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glUseProgram(*drawer->prog);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, drawer->fb->colorbuf);
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glUniform1i(LOSHADER_PIXSORT_UNIFORM_SRC, 0);
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glUniform1f(LOSHADER_PIXSORT_UNIFORM_INTENSITY, drawer->intensity);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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}
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bool loshader_pixsort_drawer_is_skippable(
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const loshader_pixsort_drawer_t* drawer) {
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assert(drawer != NULL);
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return drawer->intensity == 0;
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}
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