3dphotoshoot

annotate src/game.c @ 11:ad49e1f9b627

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author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 31 May 2015 06:02:08 +0300
parents c71c477521ca
children aef7f51f6397
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <math.h>
nuclear@11 4 #include <assert.h>
nuclear@0 5 #include "opengl.h"
nuclear@0 6 #include "game.h"
nuclear@7 7 #include "camera.h"
nuclear@10 8 #include "sdr.h"
nuclear@11 9 #include "sanegl.h"
nuclear@7 10
nuclear@8 11 static void draw_quad(float hsz, float vsz);
nuclear@0 12
nuclear@0 13 static int win_width, win_height;
nuclear@9 14 static float win_aspect;
nuclear@9 15 static int video_width, video_height;
nuclear@9 16 static float video_aspect;
nuclear@10 17 static unsigned int sdrprog;
nuclear@11 18 static int aloc_vertex, aloc_texcoord, uloc_tex;
nuclear@10 19
nuclear@10 20 static const char *vsdr_source =
nuclear@11 21 "attribute vec4 attr_vertex, attr_texcoord;\n"
nuclear@11 22 "uniform mat4 matrix_modelview, matrix_projection, matrix_texture;\n"
nuclear@10 23 "varying vec4 tex_coords;\n"
nuclear@10 24 "void main()\n"
nuclear@10 25 "{\n"
nuclear@11 26 "\tmat4 mvp = matrix_projection * matrix_modelview;\n"
nuclear@11 27 "\tgl_Position = mvp * attr_vertex;\n"
nuclear@11 28 "\ttex_coords = matrix_texture * attr_texcoord;\n"
nuclear@10 29 "}\n";
nuclear@10 30
nuclear@10 31 static const char *psdr_source =
nuclear@10 32 "#extension GL_OES_EGL_image_external : require\n"
nuclear@11 33 "precision mediump float;\n"
nuclear@10 34 "uniform samplerExternalOES tex;\n"
nuclear@10 35 "varying vec4 tex_coords;\n"
nuclear@10 36 "void main()\n"
nuclear@10 37 "{\n"
nuclear@10 38 "\tvec4 texel = texture2D(tex, tex_coords.xy);\n"
nuclear@10 39 "\tgl_FragColor = vec4(texel.xyz, 1.0);\n"
nuclear@10 40 "}\n";
nuclear@0 41
nuclear@0 42
nuclear@0 43 int game_init(void)
nuclear@0 44 {
nuclear@10 45 unsigned int vsdr, psdr;
nuclear@10 46
nuclear@0 47 glEnable(GL_DEPTH_TEST);
nuclear@0 48 glEnable(GL_CULL_FACE);
nuclear@0 49
nuclear@0 50 glClearColor(0.4, 0.4, 0.4, 1);
nuclear@8 51
nuclear@10 52 if(!(vsdr = create_vertex_shader(vsdr_source)))
nuclear@10 53 return -1;
nuclear@11 54 assert(glGetError() == GL_NO_ERROR);
nuclear@10 55 if(!(psdr = create_pixel_shader(psdr_source)))
nuclear@10 56 return -1;
nuclear@11 57 assert(glGetError() == GL_NO_ERROR);
nuclear@10 58 if(!(sdrprog = create_program_link(vsdr, psdr))) {
nuclear@10 59 fprintf(stderr, "failed to create shader program\n");
nuclear@10 60 return -1;
nuclear@10 61 }
nuclear@10 62 glUseProgram(sdrprog);
nuclear@11 63 aloc_vertex = glGetAttribLocation(sdrprog, "attr_vertex");
nuclear@11 64 aloc_texcoord = glGetAttribLocation(sdrprog, "attr_texcoord");
nuclear@11 65 uloc_tex = glGetUniformLocation(sdrprog, "tex");
nuclear@10 66
nuclear@8 67 cam_start_video();
nuclear@9 68 cam_video_size(&video_width, &video_height);
nuclear@9 69 if(video_height) {
nuclear@9 70 video_aspect = (float)video_width / (float)video_height;
nuclear@9 71 } else {
nuclear@9 72 video_aspect = 1.0;
nuclear@9 73 }
nuclear@9 74
nuclear@9 75 printf("started video %dx%d (aspect: %g)\n", video_width, video_height, video_aspect);
nuclear@0 76 return 0;
nuclear@0 77 }
nuclear@0 78
nuclear@0 79 void game_shutdown(void)
nuclear@0 80 {
nuclear@8 81 cam_shutdown();
nuclear@10 82 free_program(sdrprog);
nuclear@0 83 }
nuclear@0 84
nuclear@0 85 void game_display(unsigned long msec)
nuclear@0 86 {
nuclear@9 87 unsigned int tex;
nuclear@9 88 const float *tex_matrix;
nuclear@9 89 float xscale, yscale;
nuclear@9 90
nuclear@8 91 cam_update();
nuclear@9 92 tex = cam_texture();
nuclear@9 93 tex_matrix = cam_texture_matrix();
nuclear@7 94
nuclear@4 95 //float tsec = (float)msec / 1000.0f;
nuclear@0 96
nuclear@4 97 //glClearColor(sin(tsec * 10.0), cos(tsec * 10.0), -sin(tsec * 10.0), 1.0);
nuclear@0 98 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 99
nuclear@11 100 gl_matrix_mode(GL_MODELVIEW);
nuclear@11 101 gl_load_identity();
nuclear@11 102 gl_matrix_mode(GL_TEXTURE);
nuclear@11 103 gl_load_matrixf(tex_matrix);
nuclear@11 104
nuclear@10 105 glUseProgram(sdrprog);
nuclear@10 106 glBindTexture(GL_TEXTURE_EXTERNAL_OES, tex);
nuclear@11 107 if(uloc_tex >= 0) {
nuclear@11 108 glUniform1i(uloc_tex, 0);
nuclear@11 109 }
nuclear@7 110
nuclear@9 111 if(video_aspect > win_aspect) {
nuclear@9 112 xscale = 1.0;
nuclear@9 113 yscale = 1.0 / video_aspect;
nuclear@9 114 } else {
nuclear@9 115 xscale = video_aspect;
nuclear@9 116 yscale = 1.0;
nuclear@9 117 }
nuclear@9 118 draw_quad(xscale, yscale);
nuclear@7 119 }
nuclear@7 120
nuclear@8 121 static void draw_quad(float hsz, float vsz)
nuclear@7 122 {
nuclear@7 123 static const float varr[] = {-1, -1, 1, -1, 1, 1, -1, 1};
nuclear@9 124 static const float tcarr[] = {0, 0, 1, 0, 1, 1, 0, 1};
nuclear@7 125
nuclear@10 126 if(aloc_vertex == -1) {
nuclear@10 127 return;
nuclear@10 128 }
nuclear@7 129
nuclear@11 130 gl_matrix_mode(GL_MODELVIEW);
nuclear@11 131 gl_push_matrix();
nuclear@11 132 gl_scalef(hsz, vsz, 1);
nuclear@11 133
nuclear@11 134 gl_apply_xform(sdrprog);
nuclear@7 135
nuclear@10 136 glEnableVertexAttribArray(aloc_vertex);
nuclear@10 137 glVertexAttribPointer(aloc_vertex, 2, GL_FLOAT, 0, 0, varr);
nuclear@11 138 if(aloc_texcoord != -1) {
nuclear@10 139 glEnableVertexAttribArray(aloc_texcoord);
nuclear@10 140 glVertexAttribPointer(aloc_texcoord, 2, GL_FLOAT, 0, 0, tcarr);
nuclear@10 141 }
nuclear@7 142
nuclear@8 143 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
nuclear@7 144
nuclear@10 145 glDisableVertexAttribArray(aloc_vertex);
nuclear@11 146 if(aloc_texcoord != -1) {
nuclear@10 147 glDisableVertexAttribArray(aloc_texcoord);
nuclear@10 148 }
nuclear@11 149
nuclear@11 150 gl_pop_matrix();
nuclear@0 151 }
nuclear@0 152
nuclear@0 153 void game_reshape(int x, int y)
nuclear@0 154 {
nuclear@0 155 win_width = x;
nuclear@0 156 win_height = y;
nuclear@9 157 win_aspect = y ? (float)x / (float)y : 1.0;
nuclear@0 158 glViewport(0, 0, x, y);
nuclear@0 159
nuclear@11 160 gl_matrix_mode(GL_PROJECTION);
nuclear@11 161 gl_load_identity();
nuclear@11 162 gl_scalef((float)win_height / (float)win_width, 1, 1);
nuclear@0 163 }
nuclear@0 164
nuclear@0 165 void game_keyboard(int key, int pressed)
nuclear@0 166 {
nuclear@0 167 if(!pressed) return;
nuclear@0 168
nuclear@0 169 switch(key) {
nuclear@0 170 case 27:
nuclear@0 171 exit(0);
nuclear@0 172
nuclear@0 173 default:
nuclear@0 174 break;
nuclear@0 175 }
nuclear@0 176 }
nuclear@0 177
nuclear@0 178 #define MAX_TOUCH_IDS 16
nuclear@0 179 static struct {
nuclear@0 180 int bnstate[8];
nuclear@0 181 int prev_x, prev_y;
nuclear@0 182 } mstate[MAX_TOUCH_IDS];
nuclear@0 183
nuclear@0 184 void game_mouse_button(int id, int bn, int pressed, int x, int y)
nuclear@0 185 {
nuclear@0 186 if(id >= MAX_TOUCH_IDS) return;
nuclear@0 187
nuclear@0 188 mstate[id].prev_x = x;
nuclear@0 189 mstate[id].prev_y = y;
nuclear@0 190 mstate[id].bnstate[bn] = pressed;
nuclear@0 191 }
nuclear@0 192
nuclear@0 193 void game_mouse_motion(int id, int x, int y)
nuclear@0 194 {
nuclear@0 195 /*
nuclear@0 196 int dx, dy, cx, cy;
nuclear@0 197
nuclear@0 198 if(id >= MAX_TOUCH_IDS) return;
nuclear@0 199
nuclear@0 200 cx = win_width / 2;
nuclear@0 201 cy = win_height / 2;
nuclear@0 202
nuclear@0 203 dx = x - mstate[id].prev_x;
nuclear@0 204 dy = y - mstate[id].prev_y;
nuclear@0 205 mstate[id].prev_x = x;
nuclear@0 206 mstate[id].prev_y = y;
nuclear@0 207
nuclear@0 208 if(!dx && !dy) return;
nuclear@0 209
nuclear@0 210 if(mouselook || mstate[id].bnstate[0]) {
nuclear@0 211 player_turn(&player, dx * 0.5, dy * 0.5);
nuclear@0 212 }
nuclear@0 213 if(mstate[id].bnstate[2]) {
nuclear@0 214 dbg_cam_dist += 0.1 * dy;
nuclear@0 215 if(dbg_cam_dist < 0.0) dbg_cam_dist = 0.0;
nuclear@0 216 }
nuclear@0 217
nuclear@0 218 if(mouselook) {
nuclear@0 219 warping_mouse = 1;
nuclear@0 220 set_mouse_pos(cx, cy);
nuclear@0 221 mstate[id].prev_x = cx;
nuclear@0 222 mstate[id].prev_y = cy;
nuclear@0 223 }
nuclear@0 224 */
nuclear@0 225 }
nuclear@0 226