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 #define BUFFER_OFFSET(i) ((char *)NULL + (i))
   7
   8 #include <string.h>
   9 #include <math.h>
  10 #include <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 #include "texture_enum.h"
  29
  30 unsigned char result[WIDTH * HEIGHT * 4];
  31
  32 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  33 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  34 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  35 float saturation = 1.0f;
  36
  37 float lift_r = 0.0f, lift_g = 0.0f, lift_b = 0.0f;
  38 float gamma_r = 1.0f, gamma_g = 1.0f, gamma_b = 1.0f;
  39 float gain_r = 1.0f, gain_g = 1.0f, gain_b = 1.0f;
  40
  41 GLhandleARB read_shader(const char* filename, GLenum type)
  42 {
  43         static char buf[131072];
  44         FILE *fp = fopen(filename, "r");
  45         if (fp == NULL) {
  46                 perror(filename);
  47                 exit(1);
  48         }
  49
  50         int len = fread(buf, 1, sizeof(buf), fp);
  51         fclose(fp);
  52
  53         GLhandleARB obj = glCreateShaderObjectARB(type);
  54         const GLchar* source[] = { buf };
  55         const GLint length[] = { len };
  56         glShaderSource(obj, 1, source, length);
  57         glCompileShader(obj);
  58
  59         GLchar info_log[4096];
  60         GLsizei log_length = sizeof(info_log) - 1;
  61         glGetShaderInfoLog(obj, log_length, &log_length, info_log);
  62         info_log[log_length] = 0;
  63         printf("shader compile log: %s\n", info_log);
  64
  65         GLint status;
  66         glGetShaderiv(obj, GL_COMPILE_STATUS, &status);
  67         if (status == GL_FALSE) {
  68                 exit(1);
  69         }
  70
  71         return obj;
  72 }
  73
  74 void draw_picture_quad(GLint prog, int frame)
  75 {
  76         glUseProgramObjectARB(prog);
  77         check_error();
  78
  79         glActiveTexture(GL_TEXTURE0);
  80         glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
  81         glUniform1i(glGetUniformLocation(prog, "tex"), 0);
  82
  83         glActiveTexture(GL_TEXTURE1);
  84         glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
  85         glUniform1i(glGetUniformLocation(prog, "srgb_tex"), 1);
  86
  87         glActiveTexture(GL_TEXTURE2);
  88         glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
  89         glUniform1i(glGetUniformLocation(prog, "srgb_reverse_tex"), 2);
  90
  91         glUniform3f(glGetUniformLocation(prog, "lift"), lift_r, lift_g, lift_b);
  92         //glUniform3f(glGetUniformLocation(prog, "gamma"), gamma_r, gamma_g, gamma_b);
  93         glUniform3f(glGetUniformLocation(prog, "inv_gamma_22"),
  94                     2.2f / gamma_r,
  95                     2.2f / gamma_g,
  96                     2.2f / gamma_b);
  97         glUniform3f(glGetUniformLocation(prog, "gain_pow_inv_gamma"),
  98                     pow(gain_r, 1.0f / gamma_r),
  99                     pow(gain_g, 1.0f / gamma_g),
 100                     pow(gain_b, 1.0f / gamma_b));
 101         glUniform1f(glGetUniformLocation(prog, "saturation"), saturation);
 102
 103         glDisable(GL_BLEND);
 104         check_error();
 105         glDisable(GL_DEPTH_TEST);
 106         check_error();
 107         glDepthMask(GL_FALSE);
 108         check_error();
 109
 110         glMatrixMode(GL_PROJECTION);
 111         glLoadIdentity();
 112         glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
 113
 114         glMatrixMode(GL_MODELVIEW);
 115         glLoadIdentity();
 116
 117         glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
 118 //      glClear(GL_COLOR_BUFFER_BIT);
 119         check_error();
 120
 121         glBegin(GL_QUADS);
 122
 123         glTexCoord2f(0.0f, 1.0f);
 124         glVertex2f(0.0f, 0.0f);
 125
 126         glTexCoord2f(1.0f, 1.0f);
 127         glVertex2f(1.0f, 0.0f);
 128
 129         glTexCoord2f(1.0f, 0.0f);
 130         glVertex2f(1.0f, 1.0f);
 131
 132         glTexCoord2f(0.0f, 0.0f);
 133         glVertex2f(0.0f, 1.0f);
 134
 135         glEnd();
 136         check_error();
 137 }
 138
 139 void update_hsv()
 140 {
 141         hsv2rgb(lift_theta, lift_rad, lift_v, &lift_r, &lift_g, &lift_b);
 142         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma_r, &gamma_g, &gamma_b);
 143         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain_r, &gain_g, &gain_b);
 144
 145         if (saturation < 0.0) {
 146                 saturation = 0.0;
 147         }
 148
 149         printf("lift: %f %f %f\n", lift_r, lift_g, lift_b);
 150         printf("gamma: %f %f %f\n", gamma_r, gamma_g, gamma_b);
 151         printf("gain: %f %f %f\n", gain_r, gain_g, gain_b);
 152         printf("saturation: %f\n", saturation);
 153         printf("\n");
 154 }
 155
 156 void mouse(int x, int y)
 157 {
 158         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
 159         float yf = (HEIGHT - y) / (float)HEIGHT;
 160
 161         if (yf < 0.2f) {
 162                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
 163         } else if (yf >= 0.2f && yf < 0.4f) {
 164                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
 165         } else if (yf >= 0.4f && yf < 0.6f) {
 166                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
 167         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
 168                 saturation = (xf / 0.2f) * 4.0f;
 169         }
 170
 171         update_hsv();
 172 }
 173
 174 void load_texture(const char *filename)
 175 {
 176         SDL_Surface *img = IMG_Load(filename);
 177         if (img == NULL) {
 178                 fprintf(stderr, "Load of '%s' failed\n", filename);
 179                 exit(1);
 180         }
 181
 182         // Convert to RGB.
 183         SDL_PixelFormat *fmt = img->format;
 184         SDL_LockSurface(img);
 185         unsigned char *src_pixels = (unsigned char *)img->pixels;
 186         unsigned char *dst_pixels = (unsigned char *)malloc(img->w * img->h * 3);
 187         for (unsigned i = 0; i < img->w * img->h; ++i) {
 188                 unsigned char r, g, b;
 189                 unsigned int temp;
 190                 unsigned int pixel = *(unsigned int *)(src_pixels + i * fmt->BytesPerPixel);
 191
 192                 temp = pixel & fmt->Rmask;
 193                 temp = temp >> fmt->Rshift;
 194                 temp = temp << fmt->Rloss;
 195                 r = temp;
 196
 197                 temp = pixel & fmt->Gmask;
 198                 temp = temp >> fmt->Gshift;
 199                 temp = temp << fmt->Gloss;
 200                 g = temp;
 201
 202                 temp = pixel & fmt->Bmask;
 203                 temp = temp >> fmt->Bshift;
 204                 temp = temp << fmt->Bloss;
 205                 b = temp;
 206
 207                 dst_pixels[i * 3 + 0] = r;
 208                 dst_pixels[i * 3 + 1] = g;
 209                 dst_pixels[i * 3 + 2] = b;
 210         }
 211         SDL_UnlockSurface(img);
 212
 213 #if 1
 214         // we will convert to sRGB in the shader
 215         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, img->w, img->h, 0, GL_RGB, GL_UNSIGNED_BYTE, dst_pixels);
 216         check_error();
 217 #else
 218         // implicit sRGB conversion in hardware
 219         glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8, img->w, img->h, 0, GL_RGB, GL_UNSIGNED_BYTE, dst_pixels);
 220         check_error();
 221 #endif
 222         free(dst_pixels);
 223         SDL_FreeSurface(img);
 224 }
 225
 226 void write_ppm(const char *filename, unsigned char *screenbuf)
 227 {
 228         FILE *fp = fopen(filename, "w");
 229         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 230         for (unsigned y = 0; y < HEIGHT; ++y) {
 231                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 232                 for (unsigned x = 0; x < WIDTH; ++x) {
 233                         fputc(srcptr[x * 4 + 2], fp);
 234                         fputc(srcptr[x * 4 + 1], fp);
 235                         fputc(srcptr[x * 4 + 0], fp);
 236                 }
 237         }
 238         fclose(fp);
 239 }
 240
 241 int main(int argc, char **argv)
 242 {
 243         int quit = 0;
 244
 245         SDL_Init(SDL_INIT_EVERYTHING);
 246         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 247         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 248         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 249         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 250         SDL_WM_SetCaption("OpenGL window", NULL);
 251
 252         // geez
 253         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 254         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 255
 256         glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
 257         check_error();
 258         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 259         check_error();
 260
 261         load_texture("blg_wheels_woman_1.jpg");
 262         //glGenerateMipmap(GL_TEXTURE_2D);
 263         //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 4);
 264         //check_error();
 265
 266         //load_texture("maserati_gts_wallpaper_1280x720_01.jpg");
 267         //load_texture("90630d1295075297-console-games-wallpapers-wallpaper_need_for_speed_prostreet_09_1920x1080.jpg");
 268         //load_texture("glacier-lake-1280-720-4087.jpg");
 269
 270 #if 0
 271         // sRGB reverse LUT
 272         glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
 273         check_error();
 274         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 275         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 276         check_error();
 277         float srgb_reverse_tex[4096];
 278         for (unsigned i = 0; i < 4096; ++i) {
 279                 float x = i / 4095.0;
 280                 if (x < 0.0031308f) {
 281                         srgb_reverse_tex[i] = 12.92f * x;
 282                 } else {
 283                         srgb_reverse_tex[i] = 1.055f * pow(x, 1.0f / 2.4f) - 0.055f;
 284                 }
 285         }
 286         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 4096, 0, GL_LUMINANCE, GL_FLOAT, srgb_reverse_tex);
 287         check_error();
 288
 289         // sRGB LUT
 290         glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
 291         check_error();
 292         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 293         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 294         check_error();
 295         float srgb_tex[256];
 296         for (unsigned i = 0; i < 256; ++i) {
 297                 float x = i / 255.0;
 298                 if (x < 0.04045f) {
 299                         srgb_tex[i] = x * (1.0f / 12.92f);
 300                 } else {
 301                         srgb_tex[i] = pow((x + 0.055) * (1.0 / 1.055f), 2.4);
 302                 }
 303         }
 304         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 256, 0, GL_LUMINANCE, GL_FLOAT, srgb_tex);
 305         check_error();
 306 #endif
 307
 308         // generate a PDO to hold the data we read back with glReadPixels()
 309         // (Intel/DRI goes into a slow path if we don't read to PDO)
 310         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 311         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 312
 313         make_hsv_wheel_texture();
 314         update_hsv();
 315
 316         int prog = glCreateProgram();
 317         GLhandleARB vs_obj = read_shader("vs.glsl", GL_VERTEX_SHADER);
 318         GLhandleARB fs_obj = read_shader("fs.glsl", GL_FRAGMENT_SHADER);
 319         glAttachObjectARB(prog, vs_obj);
 320         check_error();
 321         glAttachObjectARB(prog, fs_obj);
 322         check_error();
 323         glLinkProgram(prog);
 324         check_error();
 325
 326         GLchar info_log[4096];
 327         GLsizei log_length = sizeof(info_log) - 1;
 328         log_length = sizeof(info_log) - 1;
 329         glGetProgramInfoLog(prog, log_length, &log_length, info_log);
 330         info_log[log_length] = 0;
 331         printf("link: %s\n", info_log);
 332
 333         struct timespec start, now;
 334         int frame = 0, screenshot = 0;
 335         clock_gettime(CLOCK_MONOTONIC, &start);
 336
 337         while (!quit) {
 338                 SDL_Event event;
 339                 while (SDL_PollEvent(&event)) {
 340                         if (event.type == SDL_QUIT) {
 341                                 quit = 1;
 342                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 343                                 quit = 1;
 344                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 345                                 screenshot = 1;
 346                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 347                                 mouse(event.button.x, event.button.y);
 348                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 349                                 mouse(event.motion.x, event.motion.y);
 350                         }
 351                 }
 352
 353                 ++frame;
 354
 355                 draw_picture_quad(prog, frame);
 356
 357                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 358                 check_error();
 359
 360                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 361                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 362                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 363                 draw_saturation_bar(0.6f, saturation);
 364
 365                 SDL_GL_SwapBuffers();
 366                 check_error();
 367
 368                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 369                 check_error();
 370                 if (screenshot) {
 371                         char filename[256];
 372                         sprintf(filename, "frame%05d.ppm", frame);
 373                         write_ppm(filename, screenbuf);
 374                         printf("Screenshot: %s\n", filename);
 375                         screenshot = 0;
 376                 }
 377                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 378                 check_error();
 379
 380 #if 1
 381                 clock_gettime(CLOCK_MONOTONIC, &now);
 382                 double elapsed = now.tv_sec - start.tv_sec +
 383                         1e-9 * (now.tv_nsec - start.tv_nsec);
 384                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 385                         frame, elapsed, frame / elapsed,
 386                         1e3 * elapsed / frame);
 387 #endif
 388         }
 389         return 0;
 390 }