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[movit] / main.cpp
1 #define GL_GLEXT_PROTOTYPES 1
2 #define NO_SDL_GLEXT 1
3
4 #define WIDTH 1280
5 #define HEIGHT 720
6
7 #include <string.h>
8 #include <math.h>
9 #include <time.h>
10 #include <sys/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
29 unsigned char result[WIDTH * HEIGHT * 4];
30
31 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
32 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
33 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
34 float saturation = 1.0f;
35
36 float radius = 0.3f;
37 float inner_radius = 0.3f;
38 float blur_radius = 3.0f;
39         
40 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
41 {
42         RGBTriplet lift(0.0f, 0.0f, 0.0f);
43         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
44         RGBTriplet gain(1.0f, 1.0f, 1.0f);
45
46         hsv2rgb(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
47         hsv2rgb(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
48         hsv2rgb(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
49
50         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
51         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
52         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
53         assert(ok);
54
55         if (saturation < 0.0) {
56                 saturation = 0.0;
57         }
58         ok = saturation_effect->set_float("saturation", saturation);
59         assert(ok);
60 }
61
62 void mouse(int x, int y)
63 {
64         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
65         float yf = (HEIGHT - y) / (float)HEIGHT;
66
67         if (yf < 0.2f) {
68                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
69         } else if (yf >= 0.2f && yf < 0.4f) {
70                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
71         } else if (yf >= 0.4f && yf < 0.6f) {
72                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
73         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
74                 saturation = (xf / 0.2f) * 4.0f;
75         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
76                 radius = (xf / 0.2f);
77         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
78                 inner_radius = (xf / 0.2f);
79         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
80                 blur_radius = (xf / 0.2f) * 100.0f;
81         }
82 }
83
84 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
85 {
86         SDL_Surface *img = IMG_Load(filename);
87         if (img == NULL) {
88                 fprintf(stderr, "Load of '%s' failed\n", filename);
89                 exit(1);
90         }
91
92         SDL_PixelFormat rgba_fmt;
93         rgba_fmt.palette = NULL;
94         rgba_fmt.BitsPerPixel = 32;
95         rgba_fmt.BytesPerPixel = 8;
96         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
97
98         // NOTE: Assumes little endian.
99         rgba_fmt.Rmask = 0x00ff0000;
100         rgba_fmt.Gmask = 0x0000ff00;
101         rgba_fmt.Bmask = 0x000000ff;
102         rgba_fmt.Amask = 0xff000000;
103
104         rgba_fmt.Rshift = 16;
105         rgba_fmt.Gshift = 8;
106         rgba_fmt.Bshift = 0;
107         rgba_fmt.Ashift = 24;
108         
109         rgba_fmt.colorkey = 0;
110         rgba_fmt.alpha = 255;
111
112         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
113
114         *w = img->w;
115         *h = img->h;
116
117         SDL_FreeSurface(img);
118
119         return (unsigned char *)converted->pixels;
120 }
121
122 void write_ppm(const char *filename, unsigned char *screenbuf)
123 {
124         FILE *fp = fopen(filename, "w");
125         fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
126         for (unsigned y = 0; y < HEIGHT; ++y) {
127                 unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
128                 for (unsigned x = 0; x < WIDTH; ++x) {
129                         fputc(srcptr[x * 4 + 2], fp);
130                         fputc(srcptr[x * 4 + 1], fp);
131                         fputc(srcptr[x * 4 + 0], fp);
132                 }
133         }
134         fclose(fp);
135 }
136
137 int main(int argc, char **argv)
138 {
139         int quit = 0;
140
141         SDL_Init(SDL_INIT_EVERYTHING);
142         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
143         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
144         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
145         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
146         SDL_WM_SetCaption("OpenGL window", NULL);
147         
148         // geez 
149         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
150         glPixelStorei(GL_PACK_ALIGNMENT, 1);
151
152         unsigned img_w, img_h;
153         unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
154
155         EffectChain chain(WIDTH, HEIGHT);
156
157         ImageFormat inout_format;
158         inout_format.pixel_format = FORMAT_BGRA;
159         inout_format.color_space = COLORSPACE_sRGB;
160         inout_format.gamma_curve = GAMMA_sRGB;
161
162         chain.add_input(inout_format);
163         Effect *lift_gamma_gain_effect = chain.add_effect(EFFECT_LIFT_GAMMA_GAIN);
164         Effect *saturation_effect = chain.add_effect(EFFECT_SATURATION);
165         Effect *blur_effect = chain.add_effect(EFFECT_BLUR);
166         Effect *vignette_effect = chain.add_effect(EFFECT_VIGNETTE);
167         //Effect *sandbox_effect = chain.add_effect(EFFECT_SANDBOX);
168         //sandbox_effect->set_float("parm", 42.0f);
169         //chain.add_effect(EFFECT_MIRROR);
170         chain.add_output(inout_format);
171         chain.finalize();
172
173         // generate a PDO to hold the data we read back with glReadPixels()
174         // (Intel/DRI goes into a slow path if we don't read to PDO)
175         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
176         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
177
178         make_hsv_wheel_texture();
179
180         int frame = 0, screenshot = 0;
181 #if _POSIX_C_SOURCE >= 199309L
182         struct timespec start, now;
183         clock_gettime(CLOCK_MONOTONIC, &start);
184 #else
185         struct timeval start, now;
186         gettimeofday(&start, NULL);
187 #endif
188
189         while (!quit) {
190                 SDL_Event event;
191                 while (SDL_PollEvent(&event)) {
192                         if (event.type == SDL_QUIT) {
193                                 quit = 1;
194                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
195                                 quit = 1;
196                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
197                                 screenshot = 1;
198                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
199                                 mouse(event.button.x, event.button.y);
200                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
201                                 mouse(event.motion.x, event.motion.y);
202                         }
203                 }
204
205                 ++frame;
206
207                 update_hsv(lift_gamma_gain_effect, saturation_effect);
208                 vignette_effect->set_float("radius", radius);
209                 vignette_effect->set_float("inner_radius", inner_radius);
210                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
211
212                 blur_effect->set_float("radius", blur_radius);
213
214                 chain.render_to_screen(src_img);
215                 
216                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
217                 check_error();
218                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
219                 check_error();
220                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
221                 check_error();
222
223                 glLoadIdentity();
224                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
225                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
226                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
227                 draw_saturation_bar(0.6f, saturation / 4.0f);
228                 draw_saturation_bar(0.65f, radius);
229                 draw_saturation_bar(0.70f, inner_radius);
230                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
231
232                 SDL_GL_SwapBuffers();
233                 check_error();
234
235                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 1);
236                 check_error();
237                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
238                 check_error();
239                 if (screenshot) {
240                         char filename[256];
241                         sprintf(filename, "frame%05d.ppm", frame);
242                         write_ppm(filename, screenbuf);
243                         printf("Screenshot: %s\n", filename);
244                         screenshot = 0;
245                 }
246                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
247                 check_error();
248                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
249                 check_error();
250
251 #if 1
252 #if _POSIX_C_SOURCE >= 199309L
253                 clock_gettime(CLOCK_MONOTONIC, &now);
254                 double elapsed = now.tv_sec - start.tv_sec +
255                         1e-9 * (now.tv_nsec - start.tv_nsec);
256 #else
257                 gettimeofday(&now, NULL);
258                 double elapsed = now.tv_sec - start.tv_sec +
259                         1e-6 * (now.tv_usec - start.tv_usec);
260 #endif
261                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
262                         frame, elapsed, frame / elapsed,
263                         1e3 * elapsed / frame);
264 #endif
265         }
266         return 0; 
267 }