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

   1 #define NO_SDL_GLEXT 1
   2
   3 #define WIDTH 1280
   4 #define HEIGHT 720
   5
   6 #include <epoxy/gl.h>
   7
   8 #ifdef HAVE_SDL2
   9 #include <SDL2/SDL.h>
  10 #include <SDL2/SDL_error.h>
  11 #include <SDL2/SDL_events.h>
  12 #include <SDL2/SDL_image.h>
  13 #include <SDL2/SDL_keyboard.h>
  14 #include <SDL2/SDL_mouse.h>
  15 #include <SDL2/SDL_video.h>
  16 #else
  17 #include <SDL/SDL.h>
  18 #include <SDL/SDL_error.h>
  19 #include <SDL/SDL_events.h>
  20 #include <SDL/SDL_image.h>
  21 #include <SDL/SDL_keyboard.h>
  22 #include <SDL/SDL_keysym.h>
  23 #include <SDL/SDL_mouse.h>
  24 #include <SDL/SDL_video.h>
  25 #endif
  26
  27 #include <assert.h>
  28 #include <features.h>
  29 #include <math.h>
  30 #include <png.h>
  31 #include <pngconf.h>
  32 #include <setjmp.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <sys/time.h>
  36 #include <time.h>
  37
  38 #include "diffusion_effect.h"
  39 #include "effect.h"
  40 #include "effect_chain.h"
  41 #include "flat_input.h"
  42 #include "image_format.h"
  43 #include "init.h"
  44 #include "lift_gamma_gain_effect.h"
  45 #include "saturation_effect.h"
  46 #include "util.h"
  47 #include "widgets.h"
  48
  49 using namespace movit;
  50
  51 unsigned char result[WIDTH * HEIGHT * 4];
  52
  53 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  54 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  55 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  56 float saturation = 1.0f;
  57
  58 //float radius = 0.3f;
  59 // float inner_radius = 0.3f;
  60 float blur_radius = 20.0f;
  61 float blurred_mix_amount = 0.5f;
  62
  63 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  64 {
  65         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  66         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  67         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  68
  69         hsv2rgb_normalized(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  70         hsv2rgb_normalized(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  71         hsv2rgb_normalized(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  72
  73         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  74         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  75         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  76         assert(ok);
  77
  78         if (saturation < 0.0) {
  79                 saturation = 0.0;
  80         }
  81         ok = saturation_effect->set_float("saturation", saturation);
  82         assert(ok);
  83 }
  84
  85 void mouse(int x, int y)
  86 {
  87         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  88         float yf = (HEIGHT - y) / (float)HEIGHT;
  89
  90         if (yf < 0.2f) {
  91                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  92         } else if (yf >= 0.2f && yf < 0.4f) {
  93                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  94         } else if (yf >= 0.4f && yf < 0.6f) {
  95                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  96         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  97                 saturation = (xf / 0.2f) * 4.0f;
  98 #if 0
  99         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
 100                 radius = (xf / 0.2f);
 101         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
 102                 inner_radius = (xf / 0.2f);
 103 #endif
 104         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
 105                 blur_radius = (xf / 0.2f) * 100.0f;
 106         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
 107                 blurred_mix_amount = (xf / 0.2f);
 108         }
 109 }
 110
 111 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
 112 {
 113         SDL_Surface *img = IMG_Load(filename);
 114         if (img == NULL) {
 115                 fprintf(stderr, "Load of '%s' failed\n", filename);
 116                 exit(1);
 117         }
 118
 119         SDL_PixelFormat rgba_fmt;
 120         rgba_fmt.palette = NULL;
 121         rgba_fmt.BitsPerPixel = 32;
 122         rgba_fmt.BytesPerPixel = 8;
 123         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
 124
 125         // NOTE: Assumes little endian.
 126         rgba_fmt.Rmask = 0x00ff0000;
 127         rgba_fmt.Gmask = 0x0000ff00;
 128         rgba_fmt.Bmask = 0x000000ff;
 129         rgba_fmt.Amask = 0xff000000;
 130
 131         rgba_fmt.Rshift = 16;
 132         rgba_fmt.Gshift = 8;
 133         rgba_fmt.Bshift = 0;
 134         rgba_fmt.Ashift = 24;
 135
 136 #ifndef HAVE_SDL2
 137         rgba_fmt.colorkey = 0;
 138         rgba_fmt.alpha = 255;
 139 #endif
 140
 141         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
 142
 143         *w = img->w;
 144         *h = img->h;
 145
 146         SDL_FreeSurface(img);
 147
 148         return (unsigned char *)converted->pixels;
 149 }
 150
 151 void write_png(const char *filename, unsigned char *screenbuf)
 152 {
 153         FILE *fp = fopen(filename, "wb");
 154         png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
 155         png_infop info_ptr = png_create_info_struct(png_ptr);
 156
 157         if (setjmp(png_jmpbuf(png_ptr))) {
 158                 fclose(fp);
 159                 fprintf(stderr, "Write to %s failed; exiting.\n", filename);
 160                 exit(1);
 161         }
 162
 163         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);
 164
 165         png_bytep *row_pointers = new png_bytep[HEIGHT];
 166         for (unsigned y = 0; y < HEIGHT; ++y) {
 167                 row_pointers[y] = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 168         }
 169
 170         png_init_io(png_ptr, fp);
 171         png_set_rows(png_ptr, info_ptr, row_pointers);
 172         png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
 173         png_destroy_write_struct(&png_ptr, &info_ptr);
 174         fclose(fp);
 175
 176         delete[] row_pointers;
 177 }
 178
 179 int main(int argc, char **argv)
 180 {
 181         bool quit = false;
 182
 183         if (SDL_Init(SDL_INIT_EVERYTHING) == -1) {
 184                 fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
 185                 exit(1);
 186         }
 187         SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
 188         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 189         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 190         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 191
 192 #ifdef HAVE_SDL2
 193         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
 194         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
 195         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
 196         // SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG);
 197         SDL_Window *window = SDL_CreateWindow("OpenGL window",
 198                 SDL_WINDOWPOS_UNDEFINED,
 199                 SDL_WINDOWPOS_UNDEFINED,
 200                 WIDTH, HEIGHT,
 201                 SDL_WINDOW_OPENGL);
 202         SDL_GLContext context = SDL_GL_CreateContext(window);
 203         assert(context != NULL);
 204 #else
 205         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 206         SDL_WM_SetCaption("OpenGL window", NULL);
 207 #endif
 208
 209         CHECK(init_movit(".", MOVIT_DEBUG_ON));
 210         printf("GPU texture subpixel precision: about %.1f bits\n",
 211                 log2(1.0f / movit_texel_subpixel_precision));
 212         printf("Wrongly rounded x+0.48 or x+0.52 values: %d/510\n",
 213                 movit_num_wrongly_rounded);
 214         if (movit_num_wrongly_rounded > 0) {
 215                 printf("Rounding off in the shader to compensate.\n");
 216         }
 217
 218         unsigned img_w, img_h;
 219         unsigned char *src_img = load_image(argc > 1 ? argv[1] : "blg_wheels_woman_1.jpg", &img_w, &img_h);
 220
 221         EffectChain chain(WIDTH, HEIGHT);
 222         glViewport(0, 0, WIDTH, HEIGHT);
 223
 224         ImageFormat inout_format;
 225         inout_format.color_space = COLORSPACE_sRGB;
 226         inout_format.gamma_curve = GAMMA_sRGB;
 227
 228         FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, img_w, img_h);
 229         chain.add_input(input);
 230         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
 231         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
 232         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
 233         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
 234         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
 235         //sandbox_effect->set_float("parm", 42.0f);
 236         //chain.add_effect(new MirrorEffect());
 237         chain.add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
 238         chain.set_dither_bits(8);
 239         chain.finalize();
 240
 241         // generate a PBO to hold the data we read back with glReadPixels()
 242         // (Intel/DRI goes into a slow path if we don't read to PBO)
 243         GLuint pbo;
 244         glGenBuffers(1, &pbo);
 245         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 246         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 247
 248         init_hsv_resources();
 249         check_error();
 250
 251         int frame = 0;
 252         bool screenshot = false;
 253 #if _POSIX_C_SOURCE >= 199309L
 254         struct timespec start, now;
 255         clock_gettime(CLOCK_MONOTONIC, &start);
 256 #else
 257         struct timeval start, now;
 258         gettimeofday(&start, NULL);
 259 #endif
 260
 261         while (!quit) {
 262                 SDL_Event event;
 263                 while (SDL_PollEvent(&event)) {
 264                         if (event.type == SDL_QUIT) {
 265                                 quit = true;
 266                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 267                                 quit = true;
 268                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 269                                 screenshot = true;
 270                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 271                                 mouse(event.button.x, event.button.y);
 272                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 273                                 mouse(event.motion.x, event.motion.y);
 274                         }
 275                 }
 276
 277                 ++frame;
 278
 279                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 280                 //vignette_effect->set_float("radius", radius);
 281                 //vignette_effect->set_float("inner_radius", inner_radius);
 282                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 283
 284                 CHECK(diffusion_effect->set_float("radius", blur_radius));
 285                 CHECK(diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount));
 286
 287                 input->set_pixel_data(src_img);
 288                 chain.render_to_screen();
 289
 290                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 291                 check_error();
 292                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 293                 check_error();
 294                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 295                 check_error();
 296
 297                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 298                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 299                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 300                 draw_saturation_bar(0.6f, saturation / 4.0f);
 301 #if 0
 302                 draw_saturation_bar(0.65f, radius);
 303                 draw_saturation_bar(0.70f, inner_radius);
 304 #endif
 305                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
 306                 draw_saturation_bar(0.80f, blurred_mix_amount);
 307
 308 #ifdef HAVE_SDL2
 309                 SDL_GL_SwapWindow(window);
 310 #else
 311                 SDL_GL_SwapBuffers();
 312 #endif
 313                 check_error();
 314
 315                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 316                 check_error();
 317                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 318                 check_error();
 319                 if (screenshot) {
 320                         char filename[256];
 321                         sprintf(filename, "frame%05d.png", frame);
 322                         write_png(filename, screenbuf);
 323                         printf("Screenshot: %s\n", filename);
 324                         screenshot = false;
 325                 }
 326                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 327                 check_error();
 328                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 329                 check_error();
 330
 331 #if 1
 332 #if _POSIX_C_SOURCE >= 199309L
 333                 clock_gettime(CLOCK_MONOTONIC, &now);
 334                 double elapsed = now.tv_sec - start.tv_sec +
 335                         1e-9 * (now.tv_nsec - start.tv_nsec);
 336 #else
 337                 gettimeofday(&now, NULL);
 338                 double elapsed = now.tv_sec - start.tv_sec +
 339                         1e-6 * (now.tv_usec - start.tv_usec);
 340 #endif
 341                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 342                         frame, elapsed, frame / elapsed,
 343                         1e3 * elapsed / frame);
 344
 345                 // Reset every 100 frames, so that local variations in frame times
 346                 // (especially for the first few frames, when the shaders are
 347                 // compiled etc.) don't make it hard to measure for the entire
 348                 // remaining duration of the program.
 349                 if (frame == 100) {
 350                         frame = 0;
 351                         start = now;
 352                 }
 353 #endif
 354         }
 355         cleanup_hsv_resources();
 356         return 0;
 357 }