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 void update_hsv()
  42 {
  43         hsv2rgb(lift_theta, lift_rad, lift_v, &lift_r, &lift_g, &lift_b);
  44         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma_r, &gamma_g, &gamma_b);
  45         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain_r, &gain_g, &gain_b);
  46
  47         if (saturation < 0.0) {
  48                 saturation = 0.0;
  49         }
  50
  51         printf("lift: %f %f %f\n", lift_r, lift_g, lift_b);
  52         printf("gamma: %f %f %f\n", gamma_r, gamma_g, gamma_b);
  53         printf("gain: %f %f %f\n", gain_r, gain_g, gain_b);
  54         printf("saturation: %f\n", saturation);
  55         printf("\n");
  56 }
  57
  58 void mouse(int x, int y)
  59 {
  60         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  61         float yf = (HEIGHT - y) / (float)HEIGHT;
  62
  63         if (yf < 0.2f) {
  64                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  65         } else if (yf >= 0.2f && yf < 0.4f) {
  66                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  67         } else if (yf >= 0.4f && yf < 0.6f) {
  68                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  69         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  70                 saturation = (xf / 0.2f) * 4.0f;
  71         }
  72
  73         update_hsv();
  74 }
  75
  76 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  77 {
  78         SDL_Surface *img = IMG_Load(filename);
  79         if (img == NULL) {
  80                 fprintf(stderr, "Load of '%s' failed\n", filename);
  81                 exit(1);
  82         }
  83
  84         // Convert to RGB.
  85         SDL_PixelFormat *fmt = img->format;
  86         SDL_LockSurface(img);
  87         unsigned char *src_pixels = (unsigned char *)img->pixels;
  88         unsigned char *dst_pixels = (unsigned char *)malloc(img->w * img->h * 3);
  89         for (unsigned i = 0; i < img->w * img->h; ++i) {
  90                 unsigned char r, g, b;
  91                 unsigned int temp;
  92                 unsigned int pixel = *(unsigned int *)(src_pixels + i * fmt->BytesPerPixel);
  93
  94                 temp = pixel & fmt->Rmask;
  95                 temp = temp >> fmt->Rshift;
  96                 temp = temp << fmt->Rloss;
  97                 r = temp;
  98
  99                 temp = pixel & fmt->Gmask;
 100                 temp = temp >> fmt->Gshift;
 101                 temp = temp << fmt->Gloss;
 102                 g = temp;
 103
 104                 temp = pixel & fmt->Bmask;
 105                 temp = temp >> fmt->Bshift;
 106                 temp = temp << fmt->Bloss;
 107                 b = temp;
 108
 109                 dst_pixels[i * 3 + 0] = r;
 110                 dst_pixels[i * 3 + 1] = g;
 111                 dst_pixels[i * 3 + 2] = b;
 112         }
 113         SDL_UnlockSurface(img);
 114
 115         *w = img->w;
 116         *h = img->h;
 117
 118         SDL_FreeSurface(img);
 119
 120         return dst_pixels;
 121 }
 122
 123 void load_texture(const char *filename)
 124 {
 125         unsigned w, h;
 126         unsigned char *pixels = load_image(filename, &w, &h);
 127
 128 #if 1
 129         // we will convert to sRGB in the shader
 130         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 131         check_error();
 132 #else
 133         // implicit sRGB conversion in hardware
 134         glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 135         check_error();
 136 #endif
 137
 138         free(pixels);
 139 }
 140
 141 void write_ppm(const char *filename, unsigned char *screenbuf)
 142 {
 143         FILE *fp = fopen(filename, "w");
 144         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 145         for (unsigned y = 0; y < HEIGHT; ++y) {
 146                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 147                 for (unsigned x = 0; x < WIDTH; ++x) {
 148                         fputc(srcptr[x * 4 + 2], fp);
 149                         fputc(srcptr[x * 4 + 1], fp);
 150                         fputc(srcptr[x * 4 + 0], fp);
 151                 }
 152         }
 153         fclose(fp);
 154 }
 155
 156 int main(int argc, char **argv)
 157 {
 158         int quit = 0;
 159
 160         SDL_Init(SDL_INIT_EVERYTHING);
 161         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 162         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 163         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 164         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 165         SDL_WM_SetCaption("OpenGL window", NULL);
 166
 167         // geez
 168         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 169         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 170
 171         glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
 172         check_error();
 173         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 174         check_error();
 175
 176         unsigned img_w, img_h;
 177         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 178
 179         EffectChain chain(WIDTH, HEIGHT);
 180
 181         ImageFormat inout_format;
 182         inout_format.pixel_format = FORMAT_RGB;
 183         inout_format.color_space = COLORSPACE_sRGB;
 184         inout_format.gamma_curve = GAMMA_sRGB;
 185
 186         chain.add_input(inout_format);
 187         Effect *lift_gamma_gain_effect = chain.add_effect(LIFT_GAMMA_GAIN);
 188         chain.add_output(inout_format);
 189         chain.finalize();
 190
 191         //glGenerateMipmap(GL_TEXTURE_2D);
 192         //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 4);
 193         //check_error();
 194
 195         //load_texture("maserati_gts_wallpaper_1280x720_01.jpg");
 196         //load_texture("90630d1295075297-console-games-wallpapers-wallpaper_need_for_speed_prostreet_09_1920x1080.jpg");
 197         //load_texture("glacier-lake-1280-720-4087.jpg");
 198
 199 #if 0
 200         // sRGB reverse LUT
 201         glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_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_reverse_tex[4096];
 207         for (unsigned i = 0; i < 4096; ++i) {
 208                 float x = i / 4095.0;
 209                 if (x < 0.0031308f) {
 210                         srgb_reverse_tex[i] = 12.92f * x;
 211                 } else {
 212                         srgb_reverse_tex[i] = 1.055f * pow(x, 1.0f / 2.4f) - 0.055f;
 213                 }
 214         }
 215         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 4096, 0, GL_LUMINANCE, GL_FLOAT, srgb_reverse_tex);
 216         check_error();
 217
 218         // sRGB LUT
 219         glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
 220         check_error();
 221         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 222         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 223         check_error();
 224         float srgb_tex[256];
 225         for (unsigned i = 0; i < 256; ++i) {
 226                 float x = i / 255.0;
 227                 if (x < 0.04045f) {
 228                         srgb_tex[i] = x * (1.0f / 12.92f);
 229                 } else {
 230                         srgb_tex[i] = pow((x + 0.055) * (1.0 / 1.055f), 2.4);
 231                 }
 232         }
 233         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 256, 0, GL_LUMINANCE, GL_FLOAT, srgb_tex);
 234         check_error();
 235 #endif
 236
 237         // generate a PDO to hold the data we read back with glReadPixels()
 238         // (Intel/DRI goes into a slow path if we don't read to PDO)
 239         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 240         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 241
 242         make_hsv_wheel_texture();
 243         update_hsv();
 244
 245         int prog = glCreateProgram();
 246         GLhandleARB vs_obj = compile_shader(read_file("vs.glsl"), GL_VERTEX_SHADER);
 247         GLhandleARB fs_obj = compile_shader(read_file("fs.glsl"), GL_FRAGMENT_SHADER);
 248         glAttachObjectARB(prog, vs_obj);
 249         check_error();
 250         glAttachObjectARB(prog, fs_obj);
 251         check_error();
 252         glLinkProgram(prog);
 253         check_error();
 254
 255         GLchar info_log[4096];
 256         GLsizei log_length = sizeof(info_log) - 1;
 257         log_length = sizeof(info_log) - 1;
 258         glGetProgramInfoLog(prog, log_length, &log_length, info_log);
 259         info_log[log_length] = 0;
 260         printf("link: %s\n", info_log);
 261
 262         struct timespec start, now;
 263         int frame = 0, screenshot = 0;
 264         clock_gettime(CLOCK_MONOTONIC, &start);
 265
 266         while (!quit) {
 267                 SDL_Event event;
 268                 while (SDL_PollEvent(&event)) {
 269                         if (event.type == SDL_QUIT) {
 270                                 quit = 1;
 271                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 272                                 quit = 1;
 273                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 274                                 screenshot = 1;
 275                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 276                                 mouse(event.button.x, event.button.y);
 277                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 278                                 mouse(event.motion.x, event.motion.y);
 279                         }
 280                 }
 281
 282                 ++frame;
 283
 284                 chain.render_to_screen(src_img);
 285
 286                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 287                 check_error();
 288
 289                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 290                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 291                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 292                 draw_saturation_bar(0.6f, saturation);
 293
 294                 SDL_GL_SwapBuffers();
 295                 check_error();
 296
 297                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 298                 check_error();
 299                 if (screenshot) {
 300                         char filename[256];
 301                         sprintf(filename, "frame%05d.ppm", frame);
 302                         write_ppm(filename, screenbuf);
 303                         printf("Screenshot: %s\n", filename);
 304                         screenshot = 0;
 305                 }
 306                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 307                 check_error();
 308
 309 #if 1
 310                 clock_gettime(CLOCK_MONOTONIC, &now);
 311                 double elapsed = now.tv_sec - start.tv_sec +
 312                         1e-9 * (now.tv_nsec - start.tv_nsec);
 313                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 314                         frame, elapsed, frame / elapsed,
 315                         1e3 * elapsed / frame);
 316 #endif
 317         }
 318         return 0;
 319 }