git.sesse.net Git - movit/blob - demo.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 <epoxy/gl.h>
   8
   9 #ifdef HAVE_SDL2
  10 #include <SDL2/SDL.h>
  11 #include <SDL2/SDL_error.h>
  12 #include <SDL2/SDL_events.h>
  13 #include <SDL2/SDL_image.h>
  14 #include <SDL2/SDL_keyboard.h>
  15 #include <SDL2/SDL_mouse.h>
  16 #include <SDL2/SDL_video.h>
  17 #else
  18 #include <SDL/SDL.h>
  19 #include <SDL/SDL_error.h>
  20 #include <SDL/SDL_events.h>
  21 #include <SDL/SDL_image.h>
  22 #include <SDL/SDL_keyboard.h>
  23 #include <SDL/SDL_keysym.h>
  24 #include <SDL/SDL_mouse.h>
  25 #include <SDL/SDL_video.h>
  26 #endif
  27
  28 #include <assert.h>
  29 #include <features.h>
  30 #include <math.h>
  31 #include <png.h>
  32 #include <pngconf.h>
  33 #include <setjmp.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <sys/time.h>
  37 #include <time.h>
  38
  39 #include "diffusion_effect.h"
  40 #include "effect.h"
  41 #include "effect_chain.h"
  42 #include "flat_input.h"
  43 #include "image_format.h"
  44 #include "init.h"
  45 #include "lift_gamma_gain_effect.h"
  46 #include "saturation_effect.h"
  47 #include "util.h"
  48 #include "widgets.h"
  49
  50 using namespace movit;
  51
  52 unsigned char result[WIDTH * HEIGHT * 4];
  53
  54 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  55 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  56 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  57 float saturation = 1.0f;
  58
  59 //float radius = 0.3f;
  60 // float inner_radius = 0.3f;
  61 float blur_radius = 20.0f;
  62 float blurred_mix_amount = 0.5f;
  63
  64 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  65 {
  66         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  67         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  68         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  69
  70         hsv2rgb_normalized(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  71         hsv2rgb_normalized(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  72         hsv2rgb_normalized(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  73
  74         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  75         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  76         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  77         assert(ok);
  78
  79         if (saturation < 0.0) {
  80                 saturation = 0.0;
  81         }
  82         ok = saturation_effect->set_float("saturation", saturation);
  83         assert(ok);
  84 }
  85
  86 void mouse(int x, int y)
  87 {
  88         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  89         float yf = (HEIGHT - y) / (float)HEIGHT;
  90
  91         if (yf < 0.2f) {
  92                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  93         } else if (yf >= 0.2f && yf < 0.4f) {
  94                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  95         } else if (yf >= 0.4f && yf < 0.6f) {
  96                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  97         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  98                 saturation = (xf / 0.2f) * 4.0f;
  99 #if 0
 100         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
 101                 radius = (xf / 0.2f);
 102         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
 103                 inner_radius = (xf / 0.2f);
 104 #endif
 105         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
 106                 blur_radius = (xf / 0.2f) * 100.0f;
 107         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
 108                 blurred_mix_amount = (xf / 0.2f);
 109         }
 110 }
 111
 112 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
 113 {
 114         SDL_Surface *img = IMG_Load(filename);
 115         if (img == NULL) {
 116                 fprintf(stderr, "Load of '%s' failed\n", filename);
 117                 exit(1);
 118         }
 119
 120         SDL_PixelFormat rgba_fmt;
 121         rgba_fmt.palette = NULL;
 122         rgba_fmt.BitsPerPixel = 32;
 123         rgba_fmt.BytesPerPixel = 8;
 124         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
 125
 126         // NOTE: Assumes little endian.
 127         rgba_fmt.Rmask = 0x00ff0000;
 128         rgba_fmt.Gmask = 0x0000ff00;
 129         rgba_fmt.Bmask = 0x000000ff;
 130         rgba_fmt.Amask = 0xff000000;
 131
 132         rgba_fmt.Rshift = 16;
 133         rgba_fmt.Gshift = 8;
 134         rgba_fmt.Bshift = 0;
 135         rgba_fmt.Ashift = 24;
 136
 137 #ifndef HAVE_SDL2
 138         rgba_fmt.colorkey = 0;
 139         rgba_fmt.alpha = 255;
 140 #endif
 141
 142         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
 143
 144         *w = img->w;
 145         *h = img->h;
 146
 147         SDL_FreeSurface(img);
 148
 149         return (unsigned char *)converted->pixels;
 150 }
 151
 152 void write_png(const char *filename, unsigned char *screenbuf)
 153 {
 154         FILE *fp = fopen(filename, "wb");
 155         png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
 156         png_infop info_ptr = png_create_info_struct(png_ptr);
 157
 158         if (setjmp(png_jmpbuf(png_ptr))) {
 159                 fclose(fp);
 160                 fprintf(stderr, "Write to %s failed; exiting.\n", filename);
 161                 exit(1);
 162         }
 163
 164         png_set_IHDR(png_ptr, info_ptr, WIDTH, HEIGHT, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
 165
 166         png_bytep *row_pointers = new png_bytep[HEIGHT];
 167         for (unsigned y = 0; y < HEIGHT; ++y) {
 168                 row_pointers[y] = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 169         }
 170
 171         png_init_io(png_ptr, fp);
 172         png_set_rows(png_ptr, info_ptr, row_pointers);
 173         png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
 174         png_destroy_write_struct(&png_ptr, &info_ptr);
 175         fclose(fp);
 176
 177         delete[] row_pointers;
 178 }
 179
 180 int main(int argc, char **argv)
 181 {
 182         bool quit = false;
 183
 184         if (SDL_Init(SDL_INIT_EVERYTHING) == -1) {
 185                 fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
 186                 exit(1);
 187         }
 188         SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
 189         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 190         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 191         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 192
 193 #ifdef HAVE_SDL2
 194         SDL_Window *window = SDL_CreateWindow("OpenGL window",
 195                 SDL_WINDOWPOS_UNDEFINED,
 196                 SDL_WINDOWPOS_UNDEFINED,
 197                 WIDTH, HEIGHT,
 198                 SDL_WINDOW_OPENGL);
 199         SDL_GLContext context = SDL_GL_CreateContext(window);
 200         assert(context != NULL);
 201 #else
 202         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 203         SDL_WM_SetCaption("OpenGL window", NULL);
 204 #endif
 205
 206         CHECK(init_movit(".", MOVIT_DEBUG_ON));
 207         printf("GPU texture subpixel precision: about %.1f bits\n",
 208                 log2(1.0f / movit_texel_subpixel_precision));
 209         printf("Wrongly rounded x+0.48 or x+0.52 values: %d/510\n",
 210                 movit_num_wrongly_rounded);
 211         if (movit_num_wrongly_rounded > 0) {
 212                 if (movit_shader_rounding_supported) {
 213                         printf("Rounding off in the shader to compensate.\n");
 214                 } else {
 215                         printf("No shader roundoff available; cannot compensate.\n");
 216                 }
 217         }
 218
 219         unsigned img_w, img_h;
 220         unsigned char *src_img = load_image(argc > 1 ? argv[1] : "blg_wheels_woman_1.jpg", &img_w, &img_h);
 221
 222         EffectChain chain(WIDTH, HEIGHT);
 223         glViewport(0, 0, WIDTH, HEIGHT);
 224
 225         glMatrixMode(GL_PROJECTION);
 226         glLoadIdentity();
 227         glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
 228
 229         glMatrixMode(GL_MODELVIEW);
 230         glLoadIdentity();
 231
 232         ImageFormat inout_format;
 233         inout_format.color_space = COLORSPACE_sRGB;
 234         inout_format.gamma_curve = GAMMA_sRGB;
 235
 236         FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, img_w, img_h);
 237         chain.add_input(input);
 238         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
 239         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
 240         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
 241         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
 242         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
 243         //sandbox_effect->set_float("parm", 42.0f);
 244         //chain.add_effect(new MirrorEffect());
 245         chain.add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
 246         chain.set_dither_bits(8);
 247         chain.finalize();
 248
 249         // generate a PBO to hold the data we read back with glReadPixels()
 250         // (Intel/DRI goes into a slow path if we don't read to PBO)
 251         GLuint pbo;
 252         glGenBuffers(1, &pbo);
 253         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 254         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 255
 256         make_hsv_wheel_texture();
 257
 258         int frame = 0;
 259         bool screenshot = false;
 260 #if _POSIX_C_SOURCE >= 199309L
 261         struct timespec start, now;
 262         clock_gettime(CLOCK_MONOTONIC, &start);
 263 #else
 264         struct timeval start, now;
 265         gettimeofday(&start, NULL);
 266 #endif
 267
 268         while (!quit) {
 269                 SDL_Event event;
 270                 while (SDL_PollEvent(&event)) {
 271                         if (event.type == SDL_QUIT) {
 272                                 quit = true;
 273                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 274                                 quit = true;
 275                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 276                                 screenshot = true;
 277                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 278                                 mouse(event.button.x, event.button.y);
 279                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 280                                 mouse(event.motion.x, event.motion.y);
 281                         }
 282                 }
 283
 284                 ++frame;
 285
 286                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 287                 //vignette_effect->set_float("radius", radius);
 288                 //vignette_effect->set_float("inner_radius", inner_radius);
 289                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 290
 291                 CHECK(diffusion_effect->set_float("radius", blur_radius));
 292                 CHECK(diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount));
 293
 294                 input->set_pixel_data(src_img);
 295                 chain.render_to_screen();
 296
 297                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 298                 check_error();
 299                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 300                 check_error();
 301                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 302                 check_error();
 303
 304                 glLoadIdentity();
 305                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 306                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 307                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 308                 draw_saturation_bar(0.6f, saturation / 4.0f);
 309 #if 0
 310                 draw_saturation_bar(0.65f, radius);
 311                 draw_saturation_bar(0.70f, inner_radius);
 312 #endif
 313                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
 314                 draw_saturation_bar(0.80f, blurred_mix_amount);
 315
 316 #ifdef HAVE_SDL2
 317                 SDL_GL_SwapWindow(window);
 318 #else
 319                 SDL_GL_SwapBuffers();
 320 #endif
 321                 check_error();
 322
 323                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 324                 check_error();
 325                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 326                 check_error();
 327                 if (screenshot) {
 328                         char filename[256];
 329                         sprintf(filename, "frame%05d.png", frame);
 330                         write_png(filename, screenbuf);
 331                         printf("Screenshot: %s\n", filename);
 332                         screenshot = false;
 333                 }
 334                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 335                 check_error();
 336                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 337                 check_error();
 338
 339 #if 1
 340 #if _POSIX_C_SOURCE >= 199309L
 341                 clock_gettime(CLOCK_MONOTONIC, &now);
 342                 double elapsed = now.tv_sec - start.tv_sec +
 343                         1e-9 * (now.tv_nsec - start.tv_nsec);
 344 #else
 345                 gettimeofday(&now, NULL);
 346                 double elapsed = now.tv_sec - start.tv_sec +
 347                         1e-6 * (now.tv_usec - start.tv_usec);
 348 #endif
 349                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 350                         frame, elapsed, frame / elapsed,
 351                         1e3 * elapsed / frame);
 352
 353                 // Reset every 100 frames, so that local variations in frame times
 354                 // (especially for the first few frames, when the shaders are
 355                 // compiled etc.) don't make it hard to measure for the entire
 356                 // remaining duration of the program.
 357                 if (frame == 100) {
 358                         frame = 0;
 359                         start = now;
 360                 }
 361 #endif
 362         }
 363         return 0;
 364 }