git.sesse.net Git - movit/blob - main.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 <SDL/SDL.h>
  18 #include <SDL/SDL_opengl.h>
  19 #include <SDL/SDL_image.h>
  20
  21 #include <GL/gl.h>
  22 #include <GL/glext.h>
  23
  24 #include "effect.h"
  25 #include "effect_chain.h"
  26 #include "util.h"
  27 #include "widgets.h"
  28
  29 unsigned char result[WIDTH * HEIGHT * 4];
  30
  31 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  32 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  33 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  34 float saturation = 1.0f;
  35
  36 float radius = 0.3f;
  37 float inner_radius = 0.3f;
  38
  39 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  40 {
  41         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  42         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  43         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  44
  45         hsv2rgb(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  46         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  47         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  48
  49         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  50         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  51         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  52         assert(ok);
  53
  54         if (saturation < 0.0) {
  55                 saturation = 0.0;
  56         }
  57         ok = saturation_effect->set_float("saturation", saturation);
  58         assert(ok);
  59 }
  60
  61 void mouse(int x, int y)
  62 {
  63         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  64         float yf = (HEIGHT - y) / (float)HEIGHT;
  65
  66         if (yf < 0.2f) {
  67                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  68         } else if (yf >= 0.2f && yf < 0.4f) {
  69                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  70         } else if (yf >= 0.4f && yf < 0.6f) {
  71                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  72         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  73                 saturation = (xf / 0.2f) * 4.0f;
  74         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
  75                 radius = (xf / 0.2f);
  76         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
  77                 inner_radius = (xf / 0.2f);
  78         }
  79 }
  80
  81 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  82 {
  83         SDL_Surface *img = IMG_Load(filename);
  84         if (img == NULL) {
  85                 fprintf(stderr, "Load of '%s' failed\n", filename);
  86                 exit(1);
  87         }
  88
  89         // Convert to RGB.
  90         SDL_PixelFormat *fmt = img->format;
  91         SDL_LockSurface(img);
  92         unsigned char *src_pixels = (unsigned char *)img->pixels;
  93         unsigned char *dst_pixels = (unsigned char *)malloc(img->w * img->h * 4);
  94         for (int i = 0; i < img->w * img->h; ++i) {
  95                 unsigned char r, g, b;
  96                 unsigned int temp;
  97                 unsigned int pixel = *(unsigned int *)(src_pixels + i * fmt->BytesPerPixel);
  98
  99                 temp = pixel & fmt->Rmask;
 100                 temp = temp >> fmt->Rshift;
 101                 temp = temp << fmt->Rloss;
 102                 r = temp;
 103
 104                 temp = pixel & fmt->Gmask;
 105                 temp = temp >> fmt->Gshift;
 106                 temp = temp << fmt->Gloss;
 107                 g = temp;
 108
 109                 temp = pixel & fmt->Bmask;
 110                 temp = temp >> fmt->Bshift;
 111                 temp = temp << fmt->Bloss;
 112                 b = temp;
 113
 114                 dst_pixels[i * 4 + 0] = b;
 115                 dst_pixels[i * 4 + 1] = g;
 116                 dst_pixels[i * 4 + 2] = r;
 117                 dst_pixels[i * 4 + 3] = 255;
 118         }
 119         SDL_UnlockSurface(img);
 120
 121         *w = img->w;
 122         *h = img->h;
 123
 124         SDL_FreeSurface(img);
 125
 126         return dst_pixels;
 127 }
 128
 129 void write_ppm(const char *filename, unsigned char *screenbuf)
 130 {
 131         FILE *fp = fopen(filename, "w");
 132         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 133         for (unsigned y = 0; y < HEIGHT; ++y) {
 134                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 135                 for (unsigned x = 0; x < WIDTH; ++x) {
 136                         fputc(srcptr[x * 4 + 2], fp);
 137                         fputc(srcptr[x * 4 + 1], fp);
 138                         fputc(srcptr[x * 4 + 0], fp);
 139                 }
 140         }
 141         fclose(fp);
 142 }
 143
 144 int main(int argc, char **argv)
 145 {
 146         int quit = 0;
 147
 148         SDL_Init(SDL_INIT_EVERYTHING);
 149         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 150         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 151         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 152         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 153         SDL_WM_SetCaption("OpenGL window", NULL);
 154
 155         // geez
 156         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 157         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 158
 159         unsigned img_w, img_h;
 160         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 161
 162         EffectChain chain(WIDTH, HEIGHT);
 163
 164         ImageFormat inout_format;
 165         inout_format.pixel_format = FORMAT_BGRA;
 166         inout_format.color_space = COLORSPACE_sRGB;
 167         inout_format.gamma_curve = GAMMA_sRGB;
 168
 169         chain.add_input(inout_format);
 170         Effect *lift_gamma_gain_effect = chain.add_effect(EFFECT_LIFT_GAMMA_GAIN);
 171         Effect *saturation_effect = chain.add_effect(EFFECT_SATURATION);
 172         Effect *vignette_effect = chain.add_effect(EFFECT_VIGNETTE);
 173         //chain.add_effect(EFFECT_MIRROR);
 174         chain.add_output(inout_format);
 175         chain.finalize();
 176
 177         //glGenerateMipmap(GL_TEXTURE_2D);
 178         //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 4);
 179         //check_error();
 180
 181 #if 0
 182         // sRGB reverse LUT
 183         glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
 184         check_error();
 185         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 186         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 187         check_error();
 188         float srgb_reverse_tex[4096];
 189         for (unsigned i = 0; i < 4096; ++i) {
 190                 float x = i / 4095.0;
 191                 if (x < 0.0031308f) {
 192                         srgb_reverse_tex[i] = 12.92f * x;
 193                 } else {
 194                         srgb_reverse_tex[i] = 1.055f * pow(x, 1.0f / 2.4f) - 0.055f;
 195                 }
 196         }
 197         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 4096, 0, GL_LUMINANCE, GL_FLOAT, srgb_reverse_tex);
 198         check_error();
 199
 200         // sRGB LUT
 201         glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
 202         check_error();
 203         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 204         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 205         check_error();
 206         float srgb_tex[256];
 207         for (unsigned i = 0; i < 256; ++i) {
 208                 float x = i / 255.0;
 209                 if (x < 0.04045f) {
 210                         srgb_tex[i] = x * (1.0f / 12.92f);
 211                 } else {
 212                         srgb_tex[i] = pow((x + 0.055) * (1.0 / 1.055f), 2.4);
 213                 }
 214         }
 215         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 256, 0, GL_LUMINANCE, GL_FLOAT, srgb_tex);
 216         check_error();
 217 #endif
 218
 219         // generate a PDO to hold the data we read back with glReadPixels()
 220         // (Intel/DRI goes into a slow path if we don't read to PDO)
 221         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 222         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 223
 224         make_hsv_wheel_texture();
 225
 226         int frame = 0, screenshot = 0;
 227 #if _POSIX_C_SOURCE >= 199309L
 228         struct timespec start, now;
 229         clock_gettime(CLOCK_MONOTONIC, &start);
 230 #else
 231         struct timeval start, now;
 232         gettimeofday(&start, NULL);
 233 #endif
 234
 235         while (!quit) {
 236                 SDL_Event event;
 237                 while (SDL_PollEvent(&event)) {
 238                         if (event.type == SDL_QUIT) {
 239                                 quit = 1;
 240                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 241                                 quit = 1;
 242                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 243                                 screenshot = 1;
 244                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 245                                 mouse(event.button.x, event.button.y);
 246                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 247                                 mouse(event.motion.x, event.motion.y);
 248                         }
 249                 }
 250
 251                 ++frame;
 252
 253                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 254                 vignette_effect->set_float("radius", radius);
 255                 vignette_effect->set_float("inner_radius", inner_radius);
 256                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
 257                 chain.render_to_screen(src_img);
 258
 259                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 260                 check_error();
 261                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 262                 check_error();
 263                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 264                 check_error();
 265
 266                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 267                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 268                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 269                 draw_saturation_bar(0.6f, saturation / 4.0f);
 270                 draw_saturation_bar(0.65f, radius);
 271                 draw_saturation_bar(0.70f, inner_radius);
 272
 273                 SDL_GL_SwapBuffers();
 274                 check_error();
 275
 276                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 277                 check_error();
 278                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 279                 check_error();
 280                 if (screenshot) {
 281                         char filename[256];
 282                         sprintf(filename, "frame%05d.ppm", frame);
 283                         write_ppm(filename, screenbuf);
 284                         printf("Screenshot: %s\n", filename);
 285                         screenshot = 0;
 286                 }
 287                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 288                 check_error();
 289                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
 290                 check_error();
 291
 292 #if 1
 293 #if _POSIX_C_SOURCE >= 199309L
 294                 clock_gettime(CLOCK_MONOTONIC, &now);
 295                 double elapsed = now.tv_sec - start.tv_sec +
 296                         1e-9 * (now.tv_nsec - start.tv_nsec);
 297 #else
 298                 gettimeofday(&now, NULL);
 299                 double elapsed = now.tv_sec - start.tv_sec +
 300                         1e-6 * (now.tv_usec - start.tv_usec);
 301 #endif
 302                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 303                         frame, elapsed, frame / elapsed,
 304                         1e3 * elapsed / frame);
 305 #endif
 306         }
 307         return 0;
 308 }