istereo

annotate src/istereo.c @ 13:fe1cb1c567cc

find changesets by author, revision, files, or words in the commit message
at long last
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 07 Sep 2011 08:33:55 +0300
parents 9890940948f7
children b39d8607f4bb
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 void dbg_draw(void);
nuclear@4 11 static unsigned int get_shader_program(const char *vfile, const char *pfile);
nuclear@2 12
nuclear@2 13 unsigned int prog;
nuclear@0 14
nuclear@0 15 int init(void)
nuclear@0 16 {
nuclear@4 17 add_resource_path("sdr");
nuclear@3 18
nuclear@4 19 if(!(prog = get_shader_program("test.v.glsl", "test.p.glsl"))) {
nuclear@2 20 fprintf(stderr, "failed to load shader program\n");
nuclear@2 21 return -1;
nuclear@2 22 }
nuclear@0 23 return 0;
nuclear@0 24 }
nuclear@0 25
nuclear@0 26 void cleanup(void)
nuclear@0 27 {
nuclear@2 28 free_program(prog);
nuclear@0 29 }
nuclear@0 30
nuclear@0 31 void redraw(void)
nuclear@0 32 {
nuclear@5 33 glClearColor(0.4, 0.6, 1.0, 1.0);
nuclear@0 34 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@2 35
nuclear@2 36 bind_program(prog);
nuclear@2 37
nuclear@13 38 gl_matrix_mode(GL_MODELVIEW);
nuclear@2 39 gl_load_identity();
nuclear@13 40 gl_translatef(0, 0, -8);
nuclear@2 41
nuclear@13 42 //dbg_draw();
nuclear@6 43
nuclear@13 44 gl_begin(GL_QUADS);
nuclear@2 45 gl_color3f(1, 0, 0);
nuclear@2 46 gl_vertex3f(-1, -1, 0);
nuclear@2 47 gl_color3f(0, 1, 0);
nuclear@2 48 gl_vertex3f(1, -1, 0);
nuclear@2 49 gl_color3f(0, 0, 1);
nuclear@2 50 gl_vertex3f(1, 1, 0);
nuclear@2 51 gl_color3f(1, 1, 0);
nuclear@2 52 gl_vertex3f(-1, 1, 0);
nuclear@13 53 gl_end();
nuclear@2 54
nuclear@2 55 assert(glGetError() == GL_NO_ERROR);
nuclear@0 56 }
nuclear@2 57
nuclear@2 58 void reshape(int x, int y)
nuclear@2 59 {
nuclear@2 60 glViewport(0, 0, x, y);
nuclear@2 61
nuclear@2 62 gl_matrix_mode(GL_PROJECTION);
nuclear@2 63 gl_load_identity();
nuclear@2 64 glu_perspective(45.0, (float)x / (float)y, 1.0, 1000.0);
nuclear@2 65 }
nuclear@4 66
nuclear@4 67 static unsigned int get_shader_program(const char *vfile, const char *pfile)
nuclear@4 68 {
nuclear@4 69 unsigned int prog, vs, ps;
nuclear@4 70
nuclear@4 71 if(!(vs = get_vertex_shader(find_resource(vfile, 0, 0)))) {
nuclear@4 72 return -1;
nuclear@4 73 }
nuclear@4 74 if(!(ps = get_pixel_shader(find_resource(pfile, 0, 0)))) {
nuclear@4 75 return -1;
nuclear@4 76 }
nuclear@4 77
nuclear@4 78 if(!(prog = create_program_link(vs, ps))) {
nuclear@4 79 return -1;
nuclear@4 80 }
nuclear@4 81 return prog;
nuclear@4 82 }
nuclear@6 83
nuclear@6 84 void dbg_draw(void)
nuclear@6 85 {
nuclear@9 86 static const GLfloat squareVertices[] = {
nuclear@9 87 -0.5f, -0.33f,
nuclear@9 88 0.5f, -0.33f,
nuclear@9 89 -0.5f, 0.33f,
nuclear@9 90 0.5f, 0.33f,
nuclear@9 91 };
nuclear@9 92
nuclear@9 93 static const GLubyte squareColors[] = {
nuclear@9 94 255, 255, 0, 255,
nuclear@9 95 0, 255, 255, 255,
nuclear@9 96 0, 0, 0, 0,
nuclear@9 97 255, 0, 255, 255,
nuclear@9 98 };
nuclear@9 99
nuclear@6 100 int vloc, cloc;
nuclear@6 101
nuclear@9 102 glUseProgram(prog);
nuclear@9 103
nuclear@11 104 /*gl_apply_xform(prog);*/
nuclear@6 105
nuclear@11 106
nuclear@11 107 vloc = 0;/*glGetAttribLocation(prog, "attr_vertex");*/
nuclear@11 108 cloc = 1;/*glGetAttribLocation(prog, "attr_color");*/
nuclear@9 109 assert(vloc >= 0 && cloc >= 0);
nuclear@6 110
nuclear@9 111 glVertexAttribPointer(vloc, 2, GL_FLOAT, 0, 0, squareVertices);
nuclear@9 112 glEnableVertexAttribArray(vloc);
nuclear@9 113 glVertexAttribPointer(cloc, 4, GL_UNSIGNED_BYTE, 1, 0, squareColors);
nuclear@9 114 glEnableVertexAttribArray(cloc);
nuclear@8 115
nuclear@9 116 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
nuclear@6 117
nuclear@6 118 glDisableVertexAttribArray(vloc);
nuclear@6 119 glDisableVertexAttribArray(cloc);
nuclear@6 120 }