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 "effect.h"
  22 #include "effect_chain.h"
  23 #include "util.h"
  24 #include "opengl.h"
  25 #include "widgets.h"
  26
  27 #include "flat_input.h"
  28 #include "lift_gamma_gain_effect.h"
  29 #include "saturation_effect.h"
  30 #include "diffusion_effect.h"
  31
  32 unsigned char result[WIDTH * HEIGHT * 4];
  33
  34 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  35 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  36 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  37 float saturation = 1.0f;
  38
  39 //float radius = 0.3f;
  40 // float inner_radius = 0.3f;
  41 float blur_radius = 20.0f;
  42 float blurred_mix_amount = 0.5f;
  43
  44 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  45 {
  46         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  47         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  48         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  49
  50         hsv2rgb(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  51         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  52         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  53
  54         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  55         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  56         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  57         assert(ok);
  58
  59         if (saturation < 0.0) {
  60                 saturation = 0.0;
  61         }
  62         ok = saturation_effect->set_float("saturation", saturation);
  63         assert(ok);
  64 }
  65
  66 void mouse(int x, int y)
  67 {
  68         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  69         float yf = (HEIGHT - y) / (float)HEIGHT;
  70
  71         if (yf < 0.2f) {
  72                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  73         } else if (yf >= 0.2f && yf < 0.4f) {
  74                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  75         } else if (yf >= 0.4f && yf < 0.6f) {
  76                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  77         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  78                 saturation = (xf / 0.2f) * 4.0f;
  79 #if 0
  80         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
  81                 radius = (xf / 0.2f);
  82         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
  83                 inner_radius = (xf / 0.2f);
  84 #endif
  85         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
  86                 blur_radius = (xf / 0.2f) * 100.0f;
  87         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
  88                 blurred_mix_amount = (xf / 0.2f);
  89         }
  90 }
  91
  92 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  93 {
  94         SDL_Surface *img = IMG_Load(filename);
  95         if (img == NULL) {
  96                 fprintf(stderr, "Load of '%s' failed\n", filename);
  97                 exit(1);
  98         }
  99
 100         SDL_PixelFormat rgba_fmt;
 101         rgba_fmt.palette = NULL;
 102         rgba_fmt.BitsPerPixel = 32;
 103         rgba_fmt.BytesPerPixel = 8;
 104         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
 105
 106         // NOTE: Assumes little endian.
 107         rgba_fmt.Rmask = 0x00ff0000;
 108         rgba_fmt.Gmask = 0x0000ff00;
 109         rgba_fmt.Bmask = 0x000000ff;
 110         rgba_fmt.Amask = 0xff000000;
 111
 112         rgba_fmt.Rshift = 16;
 113         rgba_fmt.Gshift = 8;
 114         rgba_fmt.Bshift = 0;
 115         rgba_fmt.Ashift = 24;
 116
 117         rgba_fmt.colorkey = 0;
 118         rgba_fmt.alpha = 255;
 119
 120         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
 121
 122         *w = img->w;
 123         *h = img->h;
 124
 125         SDL_FreeSurface(img);
 126
 127         return (unsigned char *)converted->pixels;
 128 }
 129
 130 void write_ppm(const char *filename, unsigned char *screenbuf)
 131 {
 132         FILE *fp = fopen(filename, "w");
 133         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 134         for (unsigned y = 0; y < HEIGHT; ++y) {
 135                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 136                 for (unsigned x = 0; x < WIDTH; ++x) {
 137                         fputc(srcptr[x * 4 + 2], fp);
 138                         fputc(srcptr[x * 4 + 1], fp);
 139                         fputc(srcptr[x * 4 + 0], fp);
 140                 }
 141         }
 142         fclose(fp);
 143 }
 144
 145 int main(int argc, char **argv)
 146 {
 147         int quit = 0;
 148
 149         SDL_Init(SDL_INIT_EVERYTHING);
 150         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 151         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 152         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 153         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 154         SDL_WM_SetCaption("OpenGL window", NULL);
 155
 156         // geez
 157         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 158         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 159
 160         unsigned img_w, img_h;
 161         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 162
 163         EffectChain chain(WIDTH, HEIGHT);
 164
 165         ImageFormat inout_format;
 166         inout_format.color_space = COLORSPACE_sRGB;
 167         inout_format.gamma_curve = GAMMA_sRGB;
 168
 169         FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA, WIDTH, HEIGHT);
 170         chain.add_input(input);
 171         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
 172         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
 173         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
 174         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
 175         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
 176         //sandbox_effect->set_float("parm", 42.0f);
 177         //chain.add_effect(new MirrorEffect());
 178         chain.add_output(inout_format);
 179         chain.finalize();
 180
 181         // generate a PBO to hold the data we read back with glReadPixels()
 182         // (Intel/DRI goes into a slow path if we don't read to PBO)
 183         GLuint pbo;
 184         glGenBuffers(1, &pbo);
 185         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 186         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 187
 188         make_hsv_wheel_texture();
 189
 190         int frame = 0, screenshot = 0;
 191 #if _POSIX_C_SOURCE >= 199309L
 192         struct timespec start, now;
 193         clock_gettime(CLOCK_MONOTONIC, &start);
 194 #else
 195         struct timeval start, now;
 196         gettimeofday(&start, NULL);
 197 #endif
 198
 199         while (!quit) {
 200                 SDL_Event event;
 201                 while (SDL_PollEvent(&event)) {
 202                         if (event.type == SDL_QUIT) {
 203                                 quit = 1;
 204                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 205                                 quit = 1;
 206                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 207                                 screenshot = 1;
 208                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 209                                 mouse(event.button.x, event.button.y);
 210                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 211                                 mouse(event.motion.x, event.motion.y);
 212                         }
 213                 }
 214
 215                 ++frame;
 216
 217                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 218                 //vignette_effect->set_float("radius", radius);
 219                 //vignette_effect->set_float("inner_radius", inner_radius);
 220                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 221
 222                 diffusion_effect->set_float("radius", blur_radius);
 223                 diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount);
 224
 225                 input->set_pixel_data(src_img);
 226                 chain.render_to_screen();
 227
 228                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 229                 check_error();
 230                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 231                 check_error();
 232                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 233                 check_error();
 234
 235                 glLoadIdentity();
 236                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 237                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 238                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 239                 draw_saturation_bar(0.6f, saturation / 4.0f);
 240 #if 0
 241                 draw_saturation_bar(0.65f, radius);
 242                 draw_saturation_bar(0.70f, inner_radius);
 243 #endif
 244                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
 245                 draw_saturation_bar(0.80f, blurred_mix_amount);
 246
 247                 SDL_GL_SwapBuffers();
 248                 check_error();
 249
 250                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 251                 check_error();
 252                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 253                 check_error();
 254                 if (screenshot) {
 255                         char filename[256];
 256                         sprintf(filename, "frame%05d.ppm", frame);
 257                         write_ppm(filename, screenbuf);
 258                         printf("Screenshot: %s\n", filename);
 259                         screenshot = 0;
 260                 }
 261                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 262                 check_error();
 263                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 264                 check_error();
 265
 266 #if 1
 267 #if _POSIX_C_SOURCE >= 199309L
 268                 clock_gettime(CLOCK_MONOTONIC, &now);
 269                 double elapsed = now.tv_sec - start.tv_sec +
 270                         1e-9 * (now.tv_nsec - start.tv_nsec);
 271 #else
 272                 gettimeofday(&now, NULL);
 273                 double elapsed = now.tv_sec - start.tv_sec +
 274                         1e-6 * (now.tv_usec - start.tv_usec);
 275 #endif
 276                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 277                         frame, elapsed, frame / elapsed,
 278                         1e3 * elapsed / frame);
 279 #endif
 280         }
 281         return 0;
 282 }