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