0083f68288c04e48a7f4b88deb1ef6d6da4d0136
[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 <GL/glew.h>
8 #include <SDL/SDL.h>
9 #include <SDL/SDL_error.h>
10 #include <SDL/SDL_events.h>
11 #include <SDL/SDL_image.h>
12 #include <SDL/SDL_keyboard.h>
13 #include <SDL/SDL_keysym.h>
14 #include <SDL/SDL_mouse.h>
15 #include <SDL/SDL_video.h>
16 #include <assert.h>
17 #include <features.h>
18 #include <math.h>
19 #include <png.h>
20 #include <pngconf.h>
21 #include <setjmp.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sys/time.h>
26 #include <time.h>
27
28 #include "diffusion_effect.h"
29 #include "effect.h"
30 #include "effect_chain.h"
31 #include "flat_input.h"
32 #include "image_format.h"
33 #include "init.h"
34 #include "lift_gamma_gain_effect.h"
35 #include "saturation_effect.h"
36 #include "util.h"
37 #include "widgets.h"
38
39 unsigned char result[WIDTH * HEIGHT * 4];
40
41 float lift_theta = 0.0f, lift_rad = 0.0f, lift_v = 0.0f;
42 float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
43 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
44 float saturation = 1.0f;
45
46 //float radius = 0.3f;
47 // float inner_radius = 0.3f;
48 float blur_radius = 20.0f;
49 float blurred_mix_amount = 0.5f;
50         
51 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
52 {
53         RGBTriplet lift(0.0f, 0.0f, 0.0f);
54         RGBTriplet gamma(1.0f, 1.0f, 1.0f);
55         RGBTriplet gain(1.0f, 1.0f, 1.0f);
56
57         hsv2rgb_normalized(lift_theta, lift_rad, lift_v, &lift.r, &lift.g, &lift.b);
58         hsv2rgb_normalized(gamma_theta, gamma_rad, gamma_v * 2.0f, &gamma.r, &gamma.g, &gamma.b);
59         hsv2rgb_normalized(gain_theta, gain_rad, gain_v * 4.0f, &gain.r, &gain.g, &gain.b);
60
61         bool ok = lift_gamma_gain_effect->set_vec3("lift", (float *)&lift);
62         ok = ok && lift_gamma_gain_effect->set_vec3("gamma", (float *)&gamma);
63         ok = ok && lift_gamma_gain_effect->set_vec3("gain", (float *)&gain);
64         assert(ok);
65
66         if (saturation < 0.0) {
67                 saturation = 0.0;
68         }
69         ok = saturation_effect->set_float("saturation", saturation);
70         assert(ok);
71 }
72
73 void mouse(int x, int y)
74 {
75         float xf = (x / (float)WIDTH) * 16.0f / 9.0f;
76         float yf = (HEIGHT - y) / (float)HEIGHT;
77
78         if (yf < 0.2f) {
79                 read_colorwheel(xf, yf, &lift_rad, &lift_theta, &lift_v);
80         } else if (yf >= 0.2f && yf < 0.4f) {
81                 read_colorwheel(xf, yf - 0.2f, &gamma_rad, &gamma_theta, &gamma_v);
82         } else if (yf >= 0.4f && yf < 0.6f) {
83                 read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
84         } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
85                 saturation = (xf / 0.2f) * 4.0f;
86 #if 0
87         } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
88                 radius = (xf / 0.2f);
89         } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
90                 inner_radius = (xf / 0.2f);
91 #endif
92         } else if (yf >= 0.75f && yf < 0.77f && xf < 0.2f) {
93                 blur_radius = (xf / 0.2f) * 100.0f;
94         } else if (yf >= 0.80f && yf < 0.82f && xf < 0.2f) {
95                 blurred_mix_amount = (xf / 0.2f);
96         }
97 }
98
99 unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
100 {
101         SDL_Surface *img = IMG_Load(filename);
102         if (img == NULL) {
103                 fprintf(stderr, "Load of '%s' failed\n", filename);
104                 exit(1);
105         }
106
107         SDL_PixelFormat rgba_fmt;
108         rgba_fmt.palette = NULL;
109         rgba_fmt.BitsPerPixel = 32;
110         rgba_fmt.BytesPerPixel = 8;
111         rgba_fmt.Rloss = rgba_fmt.Gloss = rgba_fmt.Bloss = rgba_fmt.Aloss = 0;
112
113         // NOTE: Assumes little endian.
114         rgba_fmt.Rmask = 0x00ff0000;
115         rgba_fmt.Gmask = 0x0000ff00;
116         rgba_fmt.Bmask = 0x000000ff;
117         rgba_fmt.Amask = 0xff000000;
118
119         rgba_fmt.Rshift = 16;
120         rgba_fmt.Gshift = 8;
121         rgba_fmt.Bshift = 0;
122         rgba_fmt.Ashift = 24;
123         
124         rgba_fmt.colorkey = 0;
125         rgba_fmt.alpha = 255;
126
127         SDL_Surface *converted = SDL_ConvertSurface(img, &rgba_fmt, SDL_SWSURFACE);
128
129         *w = img->w;
130         *h = img->h;
131
132         SDL_FreeSurface(img);
133
134         return (unsigned char *)converted->pixels;
135 }
136
137 void write_png(const char *filename, unsigned char *screenbuf)
138 {
139         FILE *fp = fopen(filename, "wb");
140         png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
141         png_infop info_ptr = png_create_info_struct(png_ptr);
142         
143         if (setjmp(png_jmpbuf(png_ptr))) {
144                 fclose(fp);
145                 fprintf(stderr, "Write to %s failed; exiting.\n", filename);
146                 exit(1);
147         }
148
149         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);
150
151         png_bytep *row_pointers = new png_bytep[HEIGHT];
152         for (unsigned y = 0; y < HEIGHT; ++y) {
153                 row_pointers[y] = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
154         }
155
156         png_init_io(png_ptr, fp);
157         png_set_rows(png_ptr, info_ptr, row_pointers);
158         png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
159         png_destroy_write_struct(&png_ptr, &info_ptr);
160         fclose(fp);
161
162         delete[] row_pointers;
163 }
164
165 int main(int argc, char **argv)
166 {
167         bool quit = false;
168
169         if (SDL_Init(SDL_INIT_EVERYTHING) == -1) {
170                 fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
171                 exit(1);
172         }
173         SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
174         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
175         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
176         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
177         SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
178         SDL_WM_SetCaption("OpenGL window", NULL);
179
180         init_movit(".", MOVIT_DEBUG_ON);
181         printf("GPU texture subpixel precision: about %.1f bits\n",
182                 log2(1.0f / movit_texel_subpixel_precision));
183         
184         unsigned img_w, img_h;
185         unsigned char *src_img = load_image(argc > 1 ? argv[1] : "blg_wheels_woman_1.jpg", &img_w, &img_h);
186
187         EffectChain chain(WIDTH, HEIGHT);
188         glViewport(0, 0, WIDTH, HEIGHT);
189
190         ImageFormat inout_format;
191         inout_format.color_space = COLORSPACE_sRGB;
192         inout_format.gamma_curve = GAMMA_sRGB;
193
194         FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, img_w, img_h);
195         chain.add_input(input);
196         Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
197         Effect *saturation_effect = chain.add_effect(new SaturationEffect());
198         Effect *diffusion_effect = chain.add_effect(new DiffusionEffect());
199         //Effect *vignette_effect = chain.add_effect(new VignetteEffect());
200         //Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
201         //sandbox_effect->set_float("parm", 42.0f);
202         //chain.add_effect(new MirrorEffect());
203         chain.add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
204         chain.set_dither_bits(8);
205         chain.finalize();
206
207         // generate a PBO to hold the data we read back with glReadPixels()
208         // (Intel/DRI goes into a slow path if we don't read to PBO)
209         GLuint pbo;
210         glGenBuffers(1, &pbo);
211         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
212         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, WIDTH * HEIGHT * 4, NULL, GL_STREAM_READ);
213
214         make_hsv_wheel_texture();
215
216         int frame = 0;
217         bool screenshot = false;
218 #if _POSIX_C_SOURCE >= 199309L
219         struct timespec start, now;
220         clock_gettime(CLOCK_MONOTONIC, &start);
221 #else
222         struct timeval start, now;
223         gettimeofday(&start, NULL);
224 #endif
225
226         while (!quit) {
227                 SDL_Event event;
228                 while (SDL_PollEvent(&event)) {
229                         if (event.type == SDL_QUIT) {
230                                 quit = true;
231                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
232                                 quit = true;
233                         } else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
234                                 screenshot = true;
235                         } else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
236                                 mouse(event.button.x, event.button.y);
237                         } else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
238                                 mouse(event.motion.x, event.motion.y);
239                         }
240                 }
241
242                 ++frame;
243
244                 update_hsv(lift_gamma_gain_effect, saturation_effect);
245                 //vignette_effect->set_float("radius", radius);
246                 //vignette_effect->set_float("inner_radius", inner_radius);
247                 //vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
248
249                 CHECK(diffusion_effect->set_float("radius", blur_radius));
250                 CHECK(diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount));
251
252                 input->set_pixel_data(src_img);
253                 chain.render_to_screen();
254                 
255                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
256                 check_error();
257                 glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
258                 check_error();
259                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
260                 check_error();
261
262                 glLoadIdentity();
263                 draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
264                 draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
265                 draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
266                 draw_saturation_bar(0.6f, saturation / 4.0f);
267 #if 0
268                 draw_saturation_bar(0.65f, radius);
269                 draw_saturation_bar(0.70f, inner_radius);
270 #endif
271                 draw_saturation_bar(0.75f, blur_radius / 100.0f);
272                 draw_saturation_bar(0.80f, blurred_mix_amount);
273
274                 SDL_GL_SwapBuffers();
275                 check_error();
276
277                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
278                 check_error();
279                 unsigned char *screenbuf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY);
280                 check_error();
281                 if (screenshot) {
282                         char filename[256];
283                         sprintf(filename, "frame%05d.png", frame);
284                         write_png(filename, screenbuf);
285                         printf("Screenshot: %s\n", filename);
286                         screenshot = false;
287                 }
288                 glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
289                 check_error();
290                 glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, 0);
291                 check_error();
292
293 #if 1
294 #if _POSIX_C_SOURCE >= 199309L
295                 clock_gettime(CLOCK_MONOTONIC, &now);
296                 double elapsed = now.tv_sec - start.tv_sec +
297                         1e-9 * (now.tv_nsec - start.tv_nsec);
298 #else
299                 gettimeofday(&now, NULL);
300                 double elapsed = now.tv_sec - start.tv_sec +
301                         1e-6 * (now.tv_usec - start.tv_usec);
302 #endif
303                 printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
304                         frame, elapsed, frame / elapsed,
305                         1e3 * elapsed / frame);
306 #endif
307         }
308         return 0; 
309 }