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 #include "lift_gamma_gain_effect.h"
  30 #include "saturation_effect.h"
  31 #include "diffusion_effect.h"
  32
  33 unsigned char result[WIDTH * HEIGHT * 4];
  34
  35 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  36 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  37 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  38 float saturation = 1.0f;
  39
  40 //float radius = 0.3f;
  41 // float inner_radius = 0.3f;
  42 float blur_radius = 20.0f;
  43 float blurred_mix_amount = 0.5f;
  44
  45 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  46 {
  47         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  48         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  49         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  50
  51         hsv2rgb(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  52         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  53         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  54
  55         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  56         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  57         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  58         assert(ok);
  59
  60         if (saturation < 0.0) {
  61                 saturation = 0.0;
  62         }
  63         ok = saturation_effect->set_float("saturation", saturation);
  64         assert(ok);
  65 }
  66
  67 void mouse(int x, int y)
  68 {
  69         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  70         float yf = (HEIGHT - y) / (float)HEIGHT;
  71
  72         if (yf < 0.2f) {
  73                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  74         } else if (yf >= 0.2f && yf < 0.4f) {
  75                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  76         } else if (yf >= 0.4f && yf < 0.6f) {
  77                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  78         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  79                 saturation = (xf / 0.2f) * 4.0f;
  80 #if 0
  81         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
  82                 radius = (xf / 0.2f);
  83         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
  84                 inner_radius = (xf / 0.2f);
  85 #endif
  86         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
  87                 blur_radius = (xf / 0.2f) * 100.0f;
  88         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
  89                 blurred_mix_amount = (xf / 0.2f);
  90         }
  91 }
  92
  93 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  94 {
  95         SDL_Surface *img = IMG_Load(filename);
  96         if (img == NULL) {
  97                 fprintf(stderr, "Load of '%s' failed\n", filename);
  98                 exit(1);
  99         }
 100
 101         SDL_PixelFormat rgba_fmt;
 102         rgba_fmt.palette = NULL;
 103         rgba_fmt.BitsPerPixel = 32;
 104         rgba_fmt.BytesPerPixel = 8;
 105         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
 106
 107         // NOTE: Assumes little endian.
 108         rgba_fmt.Rmask = 0x00ff0000;
 109         rgba_fmt.Gmask = 0x0000ff00;
 110         rgba_fmt.Bmask = 0x000000ff;
 111         rgba_fmt.Amask = 0xff000000;
 112
 113         rgba_fmt.Rshift = 16;
 114         rgba_fmt.Gshift = 8;
 115         rgba_fmt.Bshift = 0;
 116         rgba_fmt.Ashift = 24;
 117
 118         rgba_fmt.colorkey = 0;
 119         rgba_fmt.alpha = 255;
 120
 121         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
 122
 123         *w = img->w;
 124         *h = img->h;
 125
 126         SDL_FreeSurface(img);
 127
 128         return (unsigned char *)converted->pixels;
 129 }
 130
 131 void write_ppm(const char *filename, unsigned char *screenbuf)
 132 {
 133         FILE *fp = fopen(filename, "w");
 134         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 135         for (unsigned y = 0; y < HEIGHT; ++y) {
 136                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 137                 for (unsigned x = 0; x < WIDTH; ++x) {
 138                         fputc(srcptr[x * 4 + 2], fp);
 139                         fputc(srcptr[x * 4 + 1], fp);
 140                         fputc(srcptr[x * 4 + 0], fp);
 141                 }
 142         }
 143         fclose(fp);
 144 }
 145
 146 int main(int argc, char **argv)
 147 {
 148         int quit = 0;
 149
 150         SDL_Init(SDL_INIT_EVERYTHING);
 151         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 152         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 153         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 154         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 155         SDL_WM_SetCaption("OpenGL window", NULL);
 156
 157         // geez
 158         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 159         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 160
 161         unsigned img_w, img_h;
 162         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 163
 164         EffectChain chain(WIDTH, HEIGHT);
 165
 166         ImageFormat inout_format;
 167         inout_format.pixel_format = FORMAT_BGRA;
 168         inout_format.color_space = COLORSPACE_sRGB;
 169         inout_format.gamma_curve = GAMMA_sRGB;
 170
 171         Input *input = chain.add_input(inout_format);
 172         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
 173         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
 174         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
 175         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
 176         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
 177         //sandbox_effect->set_float("parm", 42.0f);
 178         //chain.add_effect(new MirrorEffect());
 179         chain.add_output(inout_format);
 180         chain.finalize();
 181
 182         // generate a PBO to hold the data we read back with glReadPixels()
 183         // (Intel/DRI goes into a slow path if we don't read to PBO)
 184         GLuint pbo;
 185         glGenBuffers(1, &pbo);
 186         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 187         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 188
 189         make_hsv_wheel_texture();
 190
 191         int frame = 0, screenshot = 0;
 192 #if _POSIX_C_SOURCE >= 199309L
 193         struct timespec start, now;
 194         clock_gettime(CLOCK_MONOTONIC, &start);
 195 #else
 196         struct timeval start, now;
 197         gettimeofday(&start, NULL);
 198 #endif
 199
 200         while (!quit) {
 201                 SDL_Event event;
 202                 while (SDL_PollEvent(&event)) {
 203                         if (event.type == SDL_QUIT) {
 204                                 quit = 1;
 205                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 206                                 quit = 1;
 207                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 208                                 screenshot = 1;
 209                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 210                                 mouse(event.button.x, event.button.y);
 211                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 212                                 mouse(event.motion.x, event.motion.y);
 213                         }
 214                 }
 215
 216                 ++frame;
 217
 218                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 219                 //vignette_effect->set_float("radius", radius);
 220                 //vignette_effect->set_float("inner_radius", inner_radius);
 221                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 222
 223                 diffusion_effect->set_float("radius", blur_radius);
 224                 diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount);
 225
 226                 input->set_pixel_data(src_img);
 227                 chain.render_to_screen();
 228
 229                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 230                 check_error();
 231                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 232                 check_error();
 233                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 234                 check_error();
 235
 236                 glLoadIdentity();
 237                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 238                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 239                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 240                 draw_saturation_bar(0.6f, saturation / 4.0f);
 241 #if 0
 242                 draw_saturation_bar(0.65f, radius);
 243                 draw_saturation_bar(0.70f, inner_radius);
 244 #endif
 245                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
 246                 draw_saturation_bar(0.80f, blurred_mix_amount);
 247
 248                 SDL_GL_SwapBuffers();
 249                 check_error();
 250
 251                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 252                 check_error();
 253                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 254                 check_error();
 255                 if (screenshot) {
 256                         char filename[256];
 257                         sprintf(filename, "frame%05d.ppm", frame);
 258                         write_ppm(filename, screenbuf);
 259                         printf("Screenshot: %s\n", filename);
 260                         screenshot = 0;
 261                 }
 262                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 263                 check_error();
 264                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 265                 check_error();
 266
 267 #if 1
 268 #if _POSIX_C_SOURCE >= 199309L
 269                 clock_gettime(CLOCK_MONOTONIC, &now);
 270                 double elapsed = now.tv_sec - start.tv_sec +
 271                         1e-9 * (now.tv_nsec - start.tv_nsec);
 272 #else
 273                 gettimeofday(&now, NULL);
 274                 double elapsed = now.tv_sec - start.tv_sec +
 275                         1e-6 * (now.tv_usec - start.tv_usec);
 276 #endif
 277                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 278                         frame, elapsed, frame / elapsed,
 279                         1e3 * elapsed / frame);
 280 #endif
 281         }
 282         return 0;
 283 }