f16a08f27fd53573bc6183c5fc6340563f9940df
[movit] / demo.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 <GL/glew.h>
18
19 #include <SDL/SDL.h>
20 #include <SDL/SDL_opengl.h>
21 #include <SDL/SDL_image.h>
22 #include <png.h>
23
24 #include "init.h"
25 #include "effect.h"
26 #include "effect_chain.h"
27 #include "util.h"
28 #include "widgets.h"
29
30 #include "flat_input.h"
31 #include "lift_gamma_gain_effect.h"
32 #include "saturation_effect.h"
33 #include "diffusion_effect.h"
34
35 unsigned char result[WIDTH * HEIGHT * 4];
36
37 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
38 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
39 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
40 float saturation = 1.0f;
41
42 //float radius = 0.3f;
43 // float inner_radius = 0.3f;
44 float blur_radius = 20.0f;
45 float blurred_mix_amount = 0.5f;
46         
47 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
48 {
49         RGBTriplet lift(0.0f, 0.0f, 0.0f);
50         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
51         RGBTriplet gain(1.0f, 1.0f, 1.0f);
52
53         hsv2rgb_normalized(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
54         hsv2rgb_normalized(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
55         hsv2rgb_normalized(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
56
57         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
58         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
59         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
60         assert(ok);
61
62         if (saturation < 0.0) {
63                 saturation = 0.0;
64         }
65         ok = saturation_effect->set_float("saturation", saturation);
66         assert(ok);
67 }
68
69 void mouse(int x, int y)
70 {
71         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
72         float yf = (HEIGHT - y) / (float)HEIGHT;
73
74         if (yf < 0.2f) {
75                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
76         } else if (yf >= 0.2f && yf < 0.4f) {
77                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
78         } else if (yf >= 0.4f && yf < 0.6f) {
79                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
80         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
81                 saturation = (xf / 0.2f) * 4.0f;
82 #if 0
83         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
84                 radius = (xf / 0.2f);
85         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
86                 inner_radius = (xf / 0.2f);
87 #endif
88         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
89                 blur_radius = (xf / 0.2f) * 100.0f;
90         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
91                 blurred_mix_amount = (xf / 0.2f);
92         }
93 }
94
95 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
96 {
97         SDL_Surface *img = IMG_Load(filename);
98         if (img == NULL) {
99                 fprintf(stderr, "Load of '%s' failed\n", filename);
100                 exit(1);
101         }
102
103         SDL_PixelFormat rgba_fmt;
104         rgba_fmt.palette = NULL;
105         rgba_fmt.BitsPerPixel = 32;
106         rgba_fmt.BytesPerPixel = 8;
107         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
108
109         // NOTE: Assumes little endian.
110         rgba_fmt.Rmask = 0x00ff0000;
111         rgba_fmt.Gmask = 0x0000ff00;
112         rgba_fmt.Bmask = 0x000000ff;
113         rgba_fmt.Amask = 0xff000000;
114
115         rgba_fmt.Rshift = 16;
116         rgba_fmt.Gshift = 8;
117         rgba_fmt.Bshift = 0;
118         rgba_fmt.Ashift = 24;
119         
120         rgba_fmt.colorkey = 0;
121         rgba_fmt.alpha = 255;
122
123         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
124
125         *w = img->w;
126         *h = img->h;
127
128         SDL_FreeSurface(img);
129
130         return (unsigned char *)converted->pixels;
131 }
132
133 void write_png(const char *filename, unsigned char *screenbuf)
134 {
135         FILE *fp = fopen(filename, "wb");
136         png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
137         png_infop info_ptr = png_create_info_struct(png_ptr);
138         
139         if (setjmp(png_jmpbuf(png_ptr))) {
140                 fclose(fp);
141                 fprintf(stderr, "Write to %s failed; exiting.\n", filename);
142                 exit(1);
143         }
144
145         png_set_IHDR(png_ptr, info_ptr, WIDTH, HEIGHT, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
146
147         png_bytep *row_pointers = new png_bytep[HEIGHT];
148         for (unsigned y = 0; y < HEIGHT; ++y) {
149                 row_pointers[y] = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
150         }
151
152         png_init_io(png_ptr, fp);
153         png_set_rows(png_ptr, info_ptr, row_pointers);
154         png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
155         png_destroy_write_struct(&png_ptr, &info_ptr);
156         fclose(fp);
157
158         delete[] row_pointers;
159 }
160
161 int main(int argc, char **argv)
162 {
163         bool quit = false;
164
165         SDL_Init(SDL_INIT_EVERYTHING);
166         SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
167         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
168         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
169         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
170         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
171         SDL_WM_SetCaption("OpenGL window", NULL);
172
173         init_movit(".", MOVIT_DEBUG_ON);
174         printf("GPU texture subpixel precision: about %.1f bits\n",
175                 log2(1.0f / movit_texel_subpixel_precision));
176         
177         unsigned img_w, img_h;
178         unsigned char *src_img = load_image(argc > 1 ? argv[1] : "blg_wheels_woman_1.jpg", &img_w, &img_h);
179
180         EffectChain chain(WIDTH, HEIGHT);
181         glViewport(0, 0, WIDTH, HEIGHT);
182
183         ImageFormat inout_format;
184         inout_format.color_space = COLORSPACE_sRGB;
185         inout_format.gamma_curve = GAMMA_sRGB;
186
187         FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, img_w, img_h);
188         chain.add_input(input);
189         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
190         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
191         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
192         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
193         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
194         //sandbox_effect->set_float("parm", 42.0f);
195         //chain.add_effect(new MirrorEffect());
196         chain.add_output(inout_format, OUTPUT_ALPHA_POSTMULTIPLIED);
197         chain.set_dither_bits(8);
198         chain.finalize();
199
200         // generate a PBO to hold the data we read back with glReadPixels()
201         // (Intel/DRI goes into a slow path if we don't read to PBO)
202         GLuint pbo;
203         glGenBuffers(1, &pbo);
204         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
205         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
206
207         make_hsv_wheel_texture();
208
209         int frame = 0;
210         bool screenshot = false;
211 #if _POSIX_C_SOURCE >= 199309L
212         struct timespec start, now;
213         clock_gettime(CLOCK_MONOTONIC, &start);
214 #else
215         struct timeval start, now;
216         gettimeofday(&start, NULL);
217 #endif
218
219         while (!quit) {
220                 SDL_Event event;
221                 while (SDL_PollEvent(&event)) {
222                         if (event.type == SDL_QUIT) {
223                                 quit = true;
224                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
225                                 quit = true;
226                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
227                                 screenshot = true;
228                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
229                                 mouse(event.button.x, event.button.y);
230                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
231                                 mouse(event.motion.x, event.motion.y);
232                         }
233                 }
234
235                 ++frame;
236
237                 update_hsv(lift_gamma_gain_effect, saturation_effect);
238                 //vignette_effect->set_float("radius", radius);
239                 //vignette_effect->set_float("inner_radius", inner_radius);
240                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
241
242                 CHECK(diffusion_effect->set_float("radius", blur_radius));
243                 CHECK(diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount));
244
245                 input->set_pixel_data(src_img);
246                 chain.render_to_screen();
247                 
248                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
249                 check_error();
250                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
251                 check_error();
252                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
253                 check_error();
254
255                 glLoadIdentity();
256                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
257                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
258                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
259                 draw_saturation_bar(0.6f, saturation / 4.0f);
260 #if 0
261                 draw_saturation_bar(0.65f, radius);
262                 draw_saturation_bar(0.70f, inner_radius);
263 #endif
264                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
265                 draw_saturation_bar(0.80f, blurred_mix_amount);
266
267                 SDL_GL_SwapBuffers();
268                 check_error();
269
270                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
271                 check_error();
272                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
273                 check_error();
274                 if (screenshot) {
275                         char filename[256];
276                         sprintf(filename, "frame%05d.png", frame);
277                         write_png(filename, screenbuf);
278                         printf("Screenshot: %s\n", filename);
279                         screenshot = false;
280                 }
281                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
282                 check_error();
283                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
284                 check_error();
285
286 #if 1
287 #if _POSIX_C_SOURCE >= 199309L
288                 clock_gettime(CLOCK_MONOTONIC, &now);
289                 double elapsed = now.tv_sec - start.tv_sec +
290                         1e-9 * (now.tv_nsec - start.tv_nsec);
291 #else
292                 gettimeofday(&now, NULL);
293                 double elapsed = now.tv_sec - start.tv_sec +
294                         1e-6 * (now.tv_usec - start.tv_usec);
295 #endif
296                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
297                         frame, elapsed, frame / elapsed,
298                         1e3 * elapsed / frame);
299 #endif
300         }
301         return 0; 
302 }