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 <sys/time.h>
  12 #include <assert.h>
  13
  14 #include <string>
  15 #include <vector>
  16 #include <map>
  17
  18 #include <SDL/SDL.h>
  19 #include <SDL/SDL_opengl.h>
  20 #include <SDL/SDL_image.h>
  21
  22 #include <GL/gl.h>
  23 #include <GL/glext.h>
  24
  25 #include "effect.h"
  26 #include "effect_chain.h"
  27 #include "util.h"
  28 #include "widgets.h"
  29 #include "texture_enum.h"
  30
  31 unsigned char result[WIDTH * HEIGHT * 4];
  32
  33 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
  34 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
  35 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
  36 float saturation = 1.0f;
  37
  38 float radius = 0.3f;
  39 float inner_radius = 0.3f;
  40
  41 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
  42 {
  43         RGBTriplet lift(0.0f, 0.0f, 0.0f);
  44         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
  45         RGBTriplet gain(1.0f, 1.0f, 1.0f);
  46
  47         hsv2rgb(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
  48         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
  49         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
  50
  51         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
  52         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
  53         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
  54         assert(ok);
  55
  56         if (saturation < 0.0) {
  57                 saturation = 0.0;
  58         }
  59         ok = saturation_effect->set_float("saturation", saturation);
  60         assert(ok);
  61 }
  62
  63 void mouse(int x, int y)
  64 {
  65         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
  66         float yf = (HEIGHT - y) / (float)HEIGHT;
  67
  68         if (yf < 0.2f) {
  69                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
  70         } else if (yf >= 0.2f && yf < 0.4f) {
  71                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
  72         } else if (yf >= 0.4f && yf < 0.6f) {
  73                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
  74         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
  75                 saturation = (xf / 0.2f) * 4.0f;
  76         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
  77                 radius = (xf / 0.2f);
  78         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
  79                 inner_radius = (xf / 0.2f);
  80         }
  81 }
  82
  83 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
  84 {
  85         SDL_Surface *img = IMG_Load(filename);
  86         if (img == NULL) {
  87                 fprintf(stderr, "Load of '%s' failed\n", filename);
  88                 exit(1);
  89         }
  90
  91         // Convert to RGB.
  92         SDL_PixelFormat *fmt = img->format;
  93         SDL_LockSurface(img);
  94         unsigned char *src_pixels = (unsigned char *)img->pixels;
  95         unsigned char *dst_pixels = (unsigned char *)malloc(img->w * img->h * 3);
  96         for (int i = 0; i < img->w * img->h; ++i) {
  97                 unsigned char r, g, b;
  98                 unsigned int temp;
  99                 unsigned int pixel = *(unsigned int *)(src_pixels + i * fmt->BytesPerPixel);
 100
 101                 temp = pixel & fmt->Rmask;
 102                 temp = temp >> fmt->Rshift;
 103                 temp = temp << fmt->Rloss;
 104                 r = temp;
 105
 106                 temp = pixel & fmt->Gmask;
 107                 temp = temp >> fmt->Gshift;
 108                 temp = temp << fmt->Gloss;
 109                 g = temp;
 110
 111                 temp = pixel & fmt->Bmask;
 112                 temp = temp >> fmt->Bshift;
 113                 temp = temp << fmt->Bloss;
 114                 b = temp;
 115
 116                 dst_pixels[i * 3 + 0] = r;
 117                 dst_pixels[i * 3 + 1] = g;
 118                 dst_pixels[i * 3 + 2] = b;
 119         }
 120         SDL_UnlockSurface(img);
 121
 122         *w = img->w;
 123         *h = img->h;
 124
 125         SDL_FreeSurface(img);
 126
 127         return dst_pixels;
 128 }
 129
 130 void write_ppm(const char *filename, unsigned char *screenbuf)
 131 {
 132         FILE *fp = fopen(filename, "w");
 133         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
 134         for (unsigned y = 0; y < HEIGHT; ++y) {
 135                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
 136                 for (unsigned x = 0; x < WIDTH; ++x) {
 137                         fputc(srcptr[x * 4 + 2], fp);
 138                         fputc(srcptr[x * 4 + 1], fp);
 139                         fputc(srcptr[x * 4 + 0], fp);
 140                 }
 141         }
 142         fclose(fp);
 143 }
 144
 145 int main(int argc, char **argv)
 146 {
 147         int quit = 0;
 148
 149         SDL_Init(SDL_INIT_EVERYTHING);
 150         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
 151         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
 152         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 153         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
 154         SDL_WM_SetCaption("OpenGL window", NULL);
 155
 156         // geez
 157         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 158         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 159
 160         glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
 161         check_error();
 162         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 163         check_error();
 164
 165         unsigned img_w, img_h;
 166         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
 167
 168         EffectChain chain(WIDTH, HEIGHT);
 169
 170         ImageFormat inout_format;
 171         inout_format.pixel_format = FORMAT_RGB;
 172         inout_format.color_space = COLORSPACE_sRGB;
 173         inout_format.gamma_curve = GAMMA_sRGB;
 174
 175         chain.add_input(inout_format);
 176         Effect *lift_gamma_gain_effect = chain.add_effect(EFFECT_LIFT_GAMMA_GAIN);
 177         Effect *saturation_effect = chain.add_effect(EFFECT_SATURATION);
 178         Effect *vignette_effect = chain.add_effect(EFFECT_VIGNETTE);
 179         chain.add_output(inout_format);
 180         chain.finalize();
 181
 182         //glGenerateMipmap(GL_TEXTURE_2D);
 183         //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 4);
 184         //check_error();
 185
 186 #if 0
 187         // sRGB reverse LUT
 188         glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
 189         check_error();
 190         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 191         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 192         check_error();
 193         float srgb_reverse_tex[4096];
 194         for (unsigned i = 0; i < 4096; ++i) {
 195                 float x = i / 4095.0;
 196                 if (x < 0.0031308f) {
 197                         srgb_reverse_tex[i] = 12.92f * x;
 198                 } else {
 199                         srgb_reverse_tex[i] = 1.055f * pow(x, 1.0f / 2.4f) - 0.055f;
 200                 }
 201         }
 202         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 4096, 0, GL_LUMINANCE, GL_FLOAT, srgb_reverse_tex);
 203         check_error();
 204
 205         // sRGB LUT
 206         glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
 207         check_error();
 208         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 209         glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 210         check_error();
 211         float srgb_tex[256];
 212         for (unsigned i = 0; i < 256; ++i) {
 213                 float x = i / 255.0;
 214                 if (x < 0.04045f) {
 215                         srgb_tex[i] = x * (1.0f / 12.92f);
 216                 } else {
 217                         srgb_tex[i] = pow((x + 0.055) * (1.0 / 1.055f), 2.4);
 218                 }
 219         }
 220         glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE16F_ARB, 256, 0, GL_LUMINANCE, GL_FLOAT, srgb_tex);
 221         check_error();
 222 #endif
 223
 224         // generate a PDO to hold the data we read back with glReadPixels()
 225         // (Intel/DRI goes into a slow path if we don't read to PDO)
 226         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
 227         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
 228
 229         make_hsv_wheel_texture();
 230
 231         int frame = 0, screenshot = 0;
 232 #if _POSIX_C_SOURCE >= 199309L
 233         struct timespec start, now;
 234         clock_gettime(CLOCK_MONOTONIC, &start);
 235 #else
 236         struct timeval start, now;
 237         gettimeofday(&start, NULL);
 238 #endif
 239
 240         while (!quit) {
 241                 SDL_Event event;
 242                 while (SDL_PollEvent(&event)) {
 243                         if (event.type == SDL_QUIT) {
 244                                 quit = 1;
 245                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
 246                                 quit = 1;
 247                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
 248                                 screenshot = 1;
 249                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
 250                                 mouse(event.button.x, event.button.y);
 251                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
 252                                 mouse(event.motion.x, event.motion.y);
 253                         }
 254                 }
 255
 256                 ++frame;
 257
 258                 update_hsv(lift_gamma_gain_effect, saturation_effect);
 259                 vignette_effect->set_float("radius", radius);
 260                 vignette_effect->set_float("inner_radius", inner_radius);
 261                 chain.render_to_screen(src_img);
 262
 263                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(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                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
 277                 check_error();
 278                 if (screenshot) {
 279                         char filename[256];
 280                         sprintf(filename, "frame%05d.ppm", frame);
 281                         write_ppm(filename, screenbuf);
 282                         printf("Screenshot: %s\n", filename);
 283                         screenshot = 0;
 284                 }
 285                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
 286                 check_error();
 287
 288 #if 1
 289 #if _POSIX_C_SOURCE >= 199309L
 290                 clock_gettime(CLOCK_MONOTONIC, &now);
 291                 double elapsed = now.tv_sec - start.tv_sec +
 292                         1e-9 * (now.tv_nsec - start.tv_nsec);
 293 #else
 294                 gettimeofday(&now, NULL);
 295                 double elapsed = now.tv_sec - start.tv_sec +
 296                         1e-6 * (now.tv_usec - start.tv_usec);
 297 #endif
 298                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 299                         frame, elapsed, frame / elapsed,
 300                         1e3 * elapsed / frame);
 301 #endif
 302         }
 303         return 0;
 304 }