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
  23 #include "init.h"
  24 #include "effect.h"
  25 #include "effect_chain.h"
  26 #include "util.h"
  27 #include "widgets.h"
  28
  29 #include "flat_input.h"
  30 #include "lift_gamma_gain_effect.h"
  31 #include "saturation_effect.h"
  32 #include "diffusion_effect.h"
  33
  34 unsigned char result[WIDTH * HEIGHT * 4];
  35
  36 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  37 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  38 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  39 float saturation = 1.0f;
  40
  41 //float radius = 0.3f;
  42 // float inner_radius = 0.3f;
  43 float blur_radius = 20.0f;
  44 float blurred_mix_amount = 0.5f;
  45
  46 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  47 {
  48         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  49         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  50         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  51
  52         hsv2rgb_normalized(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  53         hsv2rgb_normalized(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  54         hsv2rgb_normalized(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  55
  56         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  57         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  58         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  59         assert(ok);
  60
  61         if (saturation < 0.0) {
  62                 saturation = 0.0;
  63         }
  64         ok = saturation_effect->set_float("saturation", saturation);
  65         assert(ok);
  66 }
  67
  68 void mouse(int x, int y)
  69 {
  70         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  71         float yf = (HEIGHT - y) / (float)HEIGHT;
  72
  73         if (yf < 0.2f) {
  74                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  75         } else if (yf >= 0.2f && yf < 0.4f) {
  76                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  77         } else if (yf >= 0.4f && yf < 0.6f) {
  78                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  79         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  80                 saturation = (xf / 0.2f) * 4.0f;
  81 #if 0
  82         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
  83                 radius = (xf / 0.2f);
  84         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
  85                 inner_radius = (xf / 0.2f);
  86 #endif
  87         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
  88                 blur_radius = (xf / 0.2f) * 100.0f;
  89         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
  90                 blurred_mix_amount = (xf / 0.2f);
  91         }
  92 }
  93
  94 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  95 {
  96         SDL_Surface *img = IMG_Load(filename);
  97         if (img == NULL) {
  98                 fprintf(stderr, "Load of '%s' failed\n", filename);
  99                 exit(1);
 100         }
 101
 102         SDL_PixelFormat rgba_fmt;
 103         rgba_fmt.palette = NULL;
 104         rgba_fmt.BitsPerPixel = 32;
 105         rgba_fmt.BytesPerPixel = 8;
 106         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
 107
 108         // NOTE: Assumes little endian.
 109         rgba_fmt.Rmask = 0x00ff0000;
 110         rgba_fmt.Gmask = 0x0000ff00;
 111         rgba_fmt.Bmask = 0x000000ff;
 112         rgba_fmt.Amask = 0xff000000;
 113
 114         rgba_fmt.Rshift = 16;
 115         rgba_fmt.Gshift = 8;
 116         rgba_fmt.Bshift = 0;
 117         rgba_fmt.Ashift = 24;
 118
 119         rgba_fmt.colorkey = 0;
 120         rgba_fmt.alpha = 255;
 121
 122         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
 123
 124         *w = img->w;
 125         *h = img->h;
 126
 127         SDL_FreeSurface(img);
 128
 129         return (unsigned char *)converted->pixels;
 130 }
 131
 132 void write_ppm(const char *filename, unsigned char *screenbuf)
 133 {
 134         FILE *fp = fopen(filename, "w");
 135         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 136         for (unsigned y = 0; y < HEIGHT; ++y) {
 137                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 138                 for (unsigned x = 0; x < WIDTH; ++x) {
 139                         fputc(srcptr[x * 4 + 2], fp);
 140                         fputc(srcptr[x * 4 + 1], fp);
 141                         fputc(srcptr[x * 4 + 0], fp);
 142                 }
 143         }
 144         fclose(fp);
 145 }
 146
 147 int main(int argc, char **argv)
 148 {
 149         bool quit = false;
 150
 151         SDL_Init(SDL_INIT_EVERYTHING);
 152         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 153         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 154         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 155         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 156         SDL_WM_SetCaption("OpenGL window", NULL);
 157
 158         init_movit(".", MOVIT_DEBUG_ON);
 159         printf("GPU texture subpixel precision: about %.1f bits\n",
 160                 log2(1.0f / movit_texel_subpixel_precision));
 161
 162         unsigned img_w, img_h;
 163         unsigned char *src_img = load_image(argc > 1 ? argv[1] : "blg_wheels_woman_1.jpg", &img_w, &img_h);
 164
 165         EffectChain chain(WIDTH, HEIGHT);
 166         glViewport(0, 0, WIDTH, HEIGHT);
 167
 168         ImageFormat inout_format;
 169         inout_format.color_space = COLORSPACE_sRGB;
 170         inout_format.gamma_curve = GAMMA_sRGB;
 171
 172         FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA, GL_UNSIGNED_BYTE, img_w, img_h);
 173         chain.add_input(input);
 174         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
 175         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
 176         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
 177         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
 178         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
 179         //sandbox_effect->set_float("parm", 42.0f);
 180         //chain.add_effect(new MirrorEffect());
 181         chain.add_output(inout_format);
 182         chain.set_dither_bits(8);
 183         chain.finalize();
 184
 185         // generate a PBO to hold the data we read back with glReadPixels()
 186         // (Intel/DRI goes into a slow path if we don't read to PBO)
 187         GLuint pbo;
 188         glGenBuffers(1, &pbo);
 189         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 190         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 191
 192         make_hsv_wheel_texture();
 193
 194         int frame = 0;
 195         bool screenshot = false;
 196 #if _POSIX_C_SOURCE >= 199309L
 197         struct timespec start, now;
 198         clock_gettime(CLOCK_MONOTONIC, &start);
 199 #else
 200         struct timeval start, now;
 201         gettimeofday(&start, NULL);
 202 #endif
 203
 204         while (!quit) {
 205                 SDL_Event event;
 206                 while (SDL_PollEvent(&event)) {
 207                         if (event.type == SDL_QUIT) {
 208                                 quit = true;
 209                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 210                                 quit = true;
 211                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 212                                 screenshot = true;
 213                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 214                                 mouse(event.button.x, event.button.y);
 215                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 216                                 mouse(event.motion.x, event.motion.y);
 217                         }
 218                 }
 219
 220                 ++frame;
 221
 222                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 223                 //vignette_effect->set_float("radius", radius);
 224                 //vignette_effect->set_float("inner_radius", inner_radius);
 225                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 226
 227                 CHECK(diffusion_effect->set_float("radius", blur_radius));
 228                 CHECK(diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount));
 229
 230                 input->set_pixel_data(src_img);
 231                 chain.render_to_screen();
 232
 233                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 234                 check_error();
 235                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 236                 check_error();
 237                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 238                 check_error();
 239
 240                 glLoadIdentity();
 241                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 242                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 243                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 244                 draw_saturation_bar(0.6f, saturation / 4.0f);
 245 #if 0
 246                 draw_saturation_bar(0.65f, radius);
 247                 draw_saturation_bar(0.70f, inner_radius);
 248 #endif
 249                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
 250                 draw_saturation_bar(0.80f, blurred_mix_amount);
 251
 252                 SDL_GL_SwapBuffers();
 253                 check_error();
 254
 255                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
 256                 check_error();
 257                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 258                 check_error();
 259                 if (screenshot) {
 260                         char filename[256];
 261                         sprintf(filename, "frame%05d.ppm", frame);
 262                         write_ppm(filename, screenbuf);
 263                         printf("Screenshot: %s\n", filename);
 264                         screenshot = false;
 265                 }
 266                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 267                 check_error();
 268                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 269                 check_error();
 270
 271 #if 1
 272 #if _POSIX_C_SOURCE >= 199309L
 273                 clock_gettime(CLOCK_MONOTONIC, &now);
 274                 double elapsed = now.tv_sec - start.tv_sec +
 275                         1e-9 * (now.tv_nsec - start.tv_nsec);
 276 #else
 277                 gettimeofday(&now, NULL);
 278                 double elapsed = now.tv_sec - start.tv_sec +
 279                         1e-6 * (now.tv_usec - start.tv_usec);
 280 #endif
 281                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 282                         frame, elapsed, frame / elapsed,
 283                         1e3 * elapsed / frame);
 284 #endif
 285         }
 286         return 0;
 287 }