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