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 void update_hsv(Effect *lift_gamma_gain_effect)
  38 {
  39         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  40         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  41         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  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         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  48         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  49         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  50         assert(ok);
  51
  52         if (saturation < 0.0) {
  53                 saturation = 0.0;
  54         }
  55 }
  56
  57 void mouse(int x, int y)
  58 {
  59         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  60         float yf = (HEIGHT - y) / (float)HEIGHT;
  61
  62         if (yf < 0.2f) {
  63                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  64         } else if (yf >= 0.2f && yf < 0.4f) {
  65                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  66         } else if (yf >= 0.4f && yf < 0.6f) {
  67                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  68         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  69                 saturation = (xf / 0.2f) * 4.0f;
  70         }
  71 }
  72
  73 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  74 {
  75         SDL_Surface *img = IMG_Load(filename);
  76         if (img == NULL) {
  77                 fprintf(stderr, "Load of '%s' failed\n", filename);
  78                 exit(1);
  79         }
  80
  81         // Convert to RGB.
  82         SDL_PixelFormat *fmt = img->format;
  83         SDL_LockSurface(img);
  84         unsigned char *src_pixels = (unsigned char *)img->pixels;
  85         unsigned char *dst_pixels = (unsigned char *)malloc(img->w * img->h * 3);
  86         for (unsigned i = 0; i < img->w * img->h; ++i) {
  87                 unsigned char r, g, b;
  88                 unsigned int temp;
  89                 unsigned int pixel = *(unsigned int *)(src_pixels + i * fmt->BytesPerPixel);
  90
  91                 temp = pixel & fmt->Rmask;
  92                 temp = temp >> fmt->Rshift;
  93                 temp = temp << fmt->Rloss;
  94                 r = temp;
  95
  96                 temp = pixel & fmt->Gmask;
  97                 temp = temp >> fmt->Gshift;
  98                 temp = temp << fmt->Gloss;
  99                 g = temp;
 100
 101                 temp = pixel & fmt->Bmask;
 102                 temp = temp >> fmt->Bshift;
 103                 temp = temp << fmt->Bloss;
 104                 b = temp;
 105
 106                 dst_pixels[i * 3 + 0] = r;
 107                 dst_pixels[i * 3 + 1] = g;
 108                 dst_pixels[i * 3 + 2] = b;
 109         }
 110         SDL_UnlockSurface(img);
 111
 112         *w = img->w;
 113         *h = img->h;
 114
 115         SDL_FreeSurface(img);
 116
 117         return dst_pixels;
 118 }
 119
 120 void load_texture(const char *filename)
 121 {
 122         unsigned w, h;
 123         unsigned char *pixels = load_image(filename, &w, &h);
 124
 125 #if 1
 126         // we will convert to sRGB in the shader
 127         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 128         check_error();
 129 #else
 130         // implicit sRGB conversion in hardware
 131         glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 132         check_error();
 133 #endif
 134
 135         free(pixels);
 136 }
 137
 138 void write_ppm(const char *filename, unsigned char *screenbuf)
 139 {
 140         FILE *fp = fopen(filename, "w");
 141         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 142         for (unsigned y = 0; y < HEIGHT; ++y) {
 143                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 144                 for (unsigned x = 0; x < WIDTH; ++x) {
 145                         fputc(srcptr[x * 4 + 2], fp);
 146                         fputc(srcptr[x * 4 + 1], fp);
 147                         fputc(srcptr[x * 4 + 0], fp);
 148                 }
 149         }
 150         fclose(fp);
 151 }
 152
 153 int main(int argc, char **argv)
 154 {
 155         int quit = 0;
 156
 157         SDL_Init(SDL_INIT_EVERYTHING);
 158         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 159         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 160         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 161         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 162         SDL_WM_SetCaption("OpenGL window", NULL);
 163
 164         // geez
 165         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 166         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 167
 168         glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
 169         check_error();
 170         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 171         check_error();
 172
 173         unsigned img_w, img_h;
 174         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 175
 176         EffectChain chain(WIDTH, HEIGHT);
 177
 178         ImageFormat inout_format;
 179         inout_format.pixel_format = FORMAT_RGB;
 180         inout_format.color_space = COLORSPACE_sRGB;
 181         inout_format.gamma_curve = GAMMA_sRGB;
 182
 183         chain.add_input(inout_format);
 184         Effect *lift_gamma_gain_effect = chain.add_effect(LIFT_GAMMA_GAIN);
 185         chain.add_output(inout_format);
 186         chain.finalize();
 187
 188         //glGenerateMipmap(GL_TEXTURE_2D);
 189         //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 4);
 190         //check_error();
 191
 192         //load_texture("maserati_gts_wallpaper_1280x720_01.jpg");
 193         //load_texture("90630d1295075297-console-games-wallpapers-wallpaper_need_for_speed_prostreet_09_1920x1080.jpg");
 194         //load_texture("glacier-lake-1280-720-4087.jpg");
 195
 196 #if 0
 197         // sRGB reverse LUT
 198         glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
 199         check_error();
 200         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 201         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 202         check_error();
 203         float srgb_reverse_tex[4096];
 204         for (unsigned i = 0; i < 4096; ++i) {
 205                 float x = i / 4095.0;
 206                 if (x < 0.0031308f) {
 207                         srgb_reverse_tex[i] = 12.92f * x;
 208                 } else {
 209                         srgb_reverse_tex[i] = 1.055f * pow(x, 1.0f / 2.4f) - 0.055f;
 210                 }
 211         }
 212         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 4096, 0, GL_LUMINANCE, GL_FLOAT, srgb_reverse_tex);
 213         check_error();
 214
 215         // sRGB LUT
 216         glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
 217         check_error();
 218         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 219         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 220         check_error();
 221         float srgb_tex[256];
 222         for (unsigned i = 0; i < 256; ++i) {
 223                 float x = i / 255.0;
 224                 if (x < 0.04045f) {
 225                         srgb_tex[i] = x * (1.0f / 12.92f);
 226                 } else {
 227                         srgb_tex[i] = pow((x + 0.055) * (1.0 / 1.055f), 2.4);
 228                 }
 229         }
 230         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 256, 0, GL_LUMINANCE, GL_FLOAT, srgb_tex);
 231         check_error();
 232 #endif
 233
 234         // generate a PDO to hold the data we read back with glReadPixels()
 235         // (Intel/DRI goes into a slow path if we don't read to PDO)
 236         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 237         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 238
 239         make_hsv_wheel_texture();
 240
 241         int prog = glCreateProgram();
 242         GLhandleARB vs_obj = compile_shader(read_file("vs.glsl"), GL_VERTEX_SHADER);
 243         GLhandleARB fs_obj = compile_shader(read_file("fs.glsl"), GL_FRAGMENT_SHADER);
 244         glAttachObjectARB(prog, vs_obj);
 245         check_error();
 246         glAttachObjectARB(prog, fs_obj);
 247         check_error();
 248         glLinkProgram(prog);
 249         check_error();
 250
 251         GLchar info_log[4096];
 252         GLsizei log_length = sizeof(info_log) - 1;
 253         log_length = sizeof(info_log) - 1;
 254         glGetProgramInfoLog(prog, log_length, &log_length, info_log);
 255         info_log[log_length] = 0;
 256         printf("link: %s\n", info_log);
 257
 258         struct timespec start, now;
 259         int frame = 0, screenshot = 0;
 260         clock_gettime(CLOCK_MONOTONIC, &start);
 261
 262         while (!quit) {
 263                 SDL_Event event;
 264                 while (SDL_PollEvent(&event)) {
 265                         if (event.type == SDL_QUIT) {
 266                                 quit = 1;
 267                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 268                                 quit = 1;
 269                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 270                                 screenshot = 1;
 271                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 272                                 mouse(event.button.x, event.button.y);
 273                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 274                                 mouse(event.motion.x, event.motion.y);
 275                         }
 276                 }
 277
 278                 ++frame;
 279
 280                 update_hsv(lift_gamma_gain_effect);
 281                 chain.render_to_screen(src_img);
 282
 283                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 284                 check_error();
 285
 286                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
 287                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
 288                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
 289                 draw_saturation_bar(0.6f, saturation);
 290
 291                 SDL_GL_SwapBuffers();
 292                 check_error();
 293
 294                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 295                 check_error();
 296                 if (screenshot) {
 297                         char filename[256];
 298                         sprintf(filename, "frame%05d.ppm", frame);
 299                         write_ppm(filename, screenbuf);
 300                         printf("Screenshot: %s\n", filename);
 301                         screenshot = 0;
 302                 }
 303                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 304                 check_error();
 305
 306 #if 1
 307                 clock_gettime(CLOCK_MONOTONIC, &now);
 308                 double elapsed = now.tv_sec - start.tv_sec +
 309                         1e-9 * (now.tv_nsec - start.tv_nsec);
 310                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 311                         frame, elapsed, frame / elapsed,
 312                         1e3 * elapsed / frame);
 313 #endif
 314         }
 315         return 0;
 316 }