1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#include <GL/glew.h>
#include "positiongen.h"
#include "shaderloader/shaderloader.h"
#include "debuggl/debuggl.h"
#include <stdio.h>
static struct {
GLuint program;
GLint w_output;
GLint u_time;
} positiongen;
int positiongen_load(void)
{
debuggl_check( "pre positiongen_load check" );
char const * const paths[] = { "positiongen.glsl", 0 };
shader_program_sources const sources[] = { {GL_COMPUTE_SHADER, paths}, {0,0} };
if( positiongen.program ) {
debuggl_check( glDeleteProgram(positiongen.program) );
positiongen.program = 0;
}
positiongen.program = shader_program_load_from_files(sources);
if( !positiongen.program ) {
fprintf(stderr, "%s failed\n", __func__);
return -2;
}
debuggl_check( positiongen.w_output = glGetProgramResourceIndex(positiongen.program, GL_SHADER_STORAGE_BLOCK, "w_output") );
debuggl_check( positiongen.u_time = glGetProgramResourceLocation(positiongen.program, GL_UNIFORM, "u_time") );
return 0;
}
int positiongen_launch(
float t,
GLuint vbo,
int width,
int height )
{
debuggl_check( glUseProgram(positiongen.program) );
debuggl_check( glUniform1f(positiongen.u_time, t) );
debuggl_check( glBindBufferBase(GL_SHADER_STORAGE_BUFFER, positiongen.w_output, vbo) );
debuggl_check( glDispatchCompute(width/16, height/16, 1) );
debuggl_check( glBindBufferBase(GL_SHADER_STORAGE_BUFFER, positiongen.w_output, 0) );
debuggl_check( glUseProgram(0) );
}
|
