istereo

annotate src/istereo.c @ 6:f72c585aec26

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author John Tsiombikas <nuclear@mutantstargoat.com>
date Wed, 07 Sep 2011 07:41:24 +0300
parents 76ad575d72d0
children 557d86c8d7ed
rev   line source
nuclear@2 1 #include <stdio.h>
nuclear@2 2 #include <assert.h>
nuclear@3 3 #include <unistd.h>
nuclear@1 4 #include "opengl.h"
nuclear@0 5 #include "istereo.h"
nuclear@2 6 #include "sanegl.h"
nuclear@2 7 #include "sdr.h"
nuclear@4 8 #include "respath.h"
nuclear@4 9
nuclear@6 10 float varr[] = {
nuclear@6 11 -5, 0.5, 0,
nuclear@6 12 -3, 0.5, 0,
nuclear@6 13 -4, 3, 0
nuclear@6 14 };
nuclear@6 15
nuclear@6 16 float carr[] = {
nuclear@6 17 1, 0, 0,
nuclear@6 18 0, 1, 0,
nuclear@6 19 0, 0, 1
nuclear@6 20 };
nuclear@6 21
nuclear@6 22 void dbg_draw(void);
nuclear@4 23 static unsigned int get_shader_program(const char *vfile, const char *pfile);
nuclear@2 24
nuclear@2 25 unsigned int prog;
nuclear@0 26
nuclear@0 27 int init(void)
nuclear@0 28 {
nuclear@4 29 add_resource_path("sdr");
nuclear@3 30
nuclear@4 31 if(!(prog = get_shader_program("test.v.glsl", "test.p.glsl"))) {
nuclear@2 32 fprintf(stderr, "failed to load shader program\n");
nuclear@2 33 return -1;
nuclear@2 34 }
nuclear@2 35
nuclear@0 36 return 0;
nuclear@0 37 }
nuclear@0 38
nuclear@0 39 void cleanup(void)
nuclear@0 40 {
nuclear@2 41 free_program(prog);
nuclear@0 42 }
nuclear@0 43
nuclear@0 44 void redraw(void)
nuclear@0 45 {
nuclear@5 46 glClearColor(0.4, 0.6, 1.0, 1.0);
nuclear@0 47 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@2 48
nuclear@2 49 bind_program(prog);
nuclear@2 50
nuclear@2 51 gl_matrix_mode(GL_MODELVIEW);
nuclear@2 52 gl_load_identity();
nuclear@2 53 gl_translatef(0, 0, -8);
nuclear@2 54
nuclear@6 55 dbg_draw();
nuclear@6 56
nuclear@2 57 gl_begin(GL_QUADS);
nuclear@2 58 gl_color3f(1, 0, 0);
nuclear@2 59 gl_vertex3f(-1, -1, 0);
nuclear@2 60 gl_color3f(0, 1, 0);
nuclear@2 61 gl_vertex3f(1, -1, 0);
nuclear@2 62 gl_color3f(0, 0, 1);
nuclear@2 63 gl_vertex3f(1, 1, 0);
nuclear@2 64 gl_color3f(1, 1, 0);
nuclear@2 65 gl_vertex3f(-1, 1, 0);
nuclear@2 66 gl_end();
nuclear@2 67
nuclear@2 68 assert(glGetError() == GL_NO_ERROR);
nuclear@0 69 }
nuclear@2 70
nuclear@2 71 void reshape(int x, int y)
nuclear@2 72 {
nuclear@2 73 glViewport(0, 0, x, y);
nuclear@2 74
nuclear@2 75 gl_matrix_mode(GL_PROJECTION);
nuclear@2 76 gl_load_identity();
nuclear@2 77 glu_perspective(45.0, (float)x / (float)y, 1.0, 1000.0);
nuclear@2 78 }
nuclear@4 79
nuclear@4 80 static unsigned int get_shader_program(const char *vfile, const char *pfile)
nuclear@4 81 {
nuclear@4 82 unsigned int prog, vs, ps;
nuclear@4 83
nuclear@4 84 if(!(vs = get_vertex_shader(find_resource(vfile, 0, 0)))) {
nuclear@4 85 return -1;
nuclear@4 86 }
nuclear@4 87 if(!(ps = get_pixel_shader(find_resource(pfile, 0, 0)))) {
nuclear@4 88 return -1;
nuclear@4 89 }
nuclear@4 90
nuclear@4 91 if(!(prog = create_program_link(vs, ps))) {
nuclear@4 92 return -1;
nuclear@4 93 }
nuclear@4 94 return prog;
nuclear@4 95 }
nuclear@6 96
nuclear@6 97 void dbg_draw(void)
nuclear@6 98 {
nuclear@6 99 int vloc, cloc;
nuclear@6 100
nuclear@6 101 gl_apply_xform(prog);
nuclear@6 102
nuclear@6 103 vloc = glGetAttribLocation(prog, "attr_vertex");
nuclear@6 104 cloc = glGetAttribLocation(prog, "attr_color");
nuclear@6 105 assert(vloc != -1 && cloc != -1);
nuclear@6 106
nuclear@6 107 glVertexAttribPointer(vloc, 3, GL_FLOAT, 0, 0, varr);
nuclear@6 108 glEnableVertexAttribArray(vloc);
nuclear@6 109 glVertexAttribPointer(cloc, 3, GL_FLOAT, 0, 0, carr);
nuclear@6 110 glEnableVertexAttribArray(cloc);
nuclear@6 111
nuclear@6 112 glDrawArrays(GL_TRIANGLES, 0, 3);
nuclear@6 113
nuclear@6 114 glDisableVertexAttribArray(vloc);
nuclear@6 115 glDisableVertexAttribArray(cloc);
nuclear@6 116 }