git.sesse.net Git - movit/blob - main.cpp

   1 #define GL_GLEXT_PROTOTYPES 1
   2 #define NO_SDL_GLEXT 1
   3
   4 #define WIDTH 1280
   5 #define HEIGHT 720
   6
   7 #include <string.h>
   8 #include <math.h>
   9 #include <time.h>
  10 #include <sys/time.h>
  11 #include <assert.h>
  12
  13 #include <string>
  14 #include <vector>
  15 #include <map>
  16
  17 #include <SDL/SDL.h>
  18 #include <SDL/SDL_opengl.h>
  19 #include <SDL/SDL_image.h>
  20
  21 #include <GL/gl.h>
  22 #include <GL/glext.h>
  23
  24 #include "effect.h"
  25 #include "effect_chain.h"
  26 #include "util.h"
  27 #include "widgets.h"
  28
  29 unsigned char result[WIDTH * HEIGHT * 4];
  30
  31 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  32 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  33 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  34 float saturation = 1.0f;
  35
  36 float radius = 0.3f;
  37 float inner_radius = 0.3f;
  38 float blur_radius = 3.0f;
  39
  40 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  41 {
  42         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  43         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  44         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  45
  46         hsv2rgb(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  47         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  48         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  49
  50         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  51         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  52         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  53         assert(ok);
  54
  55         if (saturation < 0.0) {
  56                 saturation = 0.0;
  57         }
  58         ok = saturation_effect->set_float("saturation", saturation);
  59         assert(ok);
  60 }
  61
  62 void mouse(int x, int y)
  63 {
  64         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  65         float yf = (HEIGHT - y) / (float)HEIGHT;
  66
  67         if (yf < 0.2f) {
  68                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  69         } else if (yf >= 0.2f && yf < 0.4f) {
  70                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  71         } else if (yf >= 0.4f && yf < 0.6f) {
  72                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  73         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  74                 saturation = (xf / 0.2f) * 4.0f;
  75         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
  76                 radius = (xf / 0.2f);
  77         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
  78                 inner_radius = (xf / 0.2f);
  79         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
  80                 blur_radius = (xf / 0.2f) * 100.0f;
  81         }
  82 }
  83
  84 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  85 {
  86         SDL_Surface *img = IMG_Load(filename);
  87         if (img == NULL) {
  88                 fprintf(stderr, "Load of '%s' failed\n", filename);
  89                 exit(1);
  90         }
  91
  92         SDL_PixelFormat rgba_fmt;
  93         rgba_fmt.palette = NULL;
  94         rgba_fmt.BitsPerPixel = 32;
  95         rgba_fmt.BytesPerPixel = 8;
  96         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
  97
  98         // NOTE: Assumes little endian.
  99         rgba_fmt.Rmask = 0x00ff0000;
 100         rgba_fmt.Gmask = 0x0000ff00;
 101         rgba_fmt.Bmask = 0x000000ff;
 102         rgba_fmt.Amask = 0xff000000;
 103
 104         rgba_fmt.Rshift = 16;
 105         rgba_fmt.Gshift = 8;
 106         rgba_fmt.Bshift = 0;
 107         rgba_fmt.Ashift = 24;
 108
 109         rgba_fmt.colorkey = 0;
 110         rgba_fmt.alpha = 255;
 111
 112         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
 113
 114         *w = img->w;
 115         *h = img->h;
 116
 117         SDL_FreeSurface(img);
 118
 119         return (unsigned char *)converted->pixels;
 120 }
 121
 122 void write_ppm(const char *filename, unsigned char *screenbuf)
 123 {
 124         FILE *fp = fopen(filename, "w");
 125         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 126         for (unsigned y = 0; y < HEIGHT; ++y) {
 127                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 128                 for (unsigned x = 0; x < WIDTH; ++x) {
 129                         fputc(srcptr[x * 4 + 2], fp);
 130                         fputc(srcptr[x * 4 + 1], fp);
 131                         fputc(srcptr[x * 4 + 0], fp);
 132                 }
 133         }
 134         fclose(fp);
 135 }
 136
 137 int main(int argc, char **argv)
 138 {
 139         int quit = 0;
 140
 141         SDL_Init(SDL_INIT_EVERYTHING);
 142         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 143         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 144         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 145         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 146         SDL_WM_SetCaption("OpenGL window", NULL);
 147
 148         // geez
 149         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 150         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 151
 152         unsigned img_w, img_h;
 153         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 154
 155         EffectChain chain(WIDTH, HEIGHT);
 156
 157         ImageFormat inout_format;
 158         inout_format.pixel_format = FORMAT_BGRA;
 159         inout_format.color_space = COLORSPACE_sRGB;
 160         inout_format.gamma_curve = GAMMA_sRGB;
 161
 162         chain.add_input(inout_format);
 163         Effect *lift_gamma_gain_effect = chain.add_effect(EFFECT_LIFT_GAMMA_GAIN);
 164         Effect *saturation_effect = chain.add_effect(EFFECT_SATURATION);
 165         Effect *blur_effect = chain.add_effect(EFFECT_BLUR);
 166         Effect *vignette_effect = chain.add_effect(EFFECT_VIGNETTE);
 167         //Effect *sandbox_effect = chain.add_effect(EFFECT_SANDBOX);
 168         //sandbox_effect->set_float("parm", 42.0f);
 169         //chain.add_effect(EFFECT_MIRROR);
 170         chain.add_output(inout_format);
 171         chain.finalize();
 172
 173         // generate a PDO to hold the data we read back with glReadPixels()
 174         // (Intel/DRI goes into a slow path if we don't read to PDO)
 175         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 176         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 177
 178         make_hsv_wheel_texture();
 179
 180         int frame = 0, screenshot = 0;
 181 #if _POSIX_C_SOURCE >= 199309L
 182         struct timespec start, now;
 183         clock_gettime(CLOCK_MONOTONIC, &start);
 184 #else
 185         struct timeval start, now;
 186         gettimeofday(&start, NULL);
 187 #endif
 188
 189         while (!quit) {
 190                 SDL_Event event;
 191                 while (SDL_PollEvent(&event)) {
 192                         if (event.type == SDL_QUIT) {
 193                                 quit = 1;
 194                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 195                                 quit = 1;
 196                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 197                                 screenshot = 1;
 198                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 199                                 mouse(event.button.x, event.button.y);
 200                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 201                                 mouse(event.motion.x, event.motion.y);
 202                         }
 203                 }
 204
 205                 ++frame;
 206
 207                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 208                 vignette_effect->set_float("radius", radius);
 209                 vignette_effect->set_float("inner_radius", inner_radius);
 210                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 211
 212                 blur_effect->set_float("radius", blur_radius);
 213
 214                 chain.render_to_screen(src_img);
 215
 216                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 217                 check_error();
 218                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 219                 check_error();
 220                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 221                 check_error();
 222
 223                 glLoadIdentity();
 224                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 225                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 226                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 227                 draw_saturation_bar(0.6f, saturation / 4.0f);
 228                 draw_saturation_bar(0.65f, radius);
 229                 draw_saturation_bar(0.70f, inner_radius);
 230                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
 231
 232                 SDL_GL_SwapBuffers();
 233                 check_error();
 234
 235                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 236                 check_error();
 237                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 238                 check_error();
 239                 if (screenshot) {
 240                         char filename[256];
 241                         sprintf(filename, "frame%05d.ppm", frame);
 242                         write_ppm(filename, screenbuf);
 243                         printf("Screenshot: %s\n", filename);
 244                         screenshot = 0;
 245                 }
 246                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 247                 check_error();
 248                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 249                 check_error();
 250
 251 #if 1
 252 #if _POSIX_C_SOURCE >= 199309L
 253                 clock_gettime(CLOCK_MONOTONIC, &now);
 254                 double elapsed = now.tv_sec - start.tv_sec +
 255                         1e-9 * (now.tv_nsec - start.tv_nsec);
 256 #else
 257                 gettimeofday(&now, NULL);
 258                 double elapsed = now.tv_sec - start.tv_sec +
 259                         1e-6 * (now.tv_usec - start.tv_usec);
 260 #endif
 261                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 262                         frame, elapsed, frame / elapsed,
 263                         1e3 * elapsed / frame);
 264 #endif
 265         }
 266         return 0;
 267 }