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