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