The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1 | /*--------------------------------------------------------------------------- |
| 2 | |
| 3 | rpng2 - progressive-model PNG display program rpng2-win.c |
| 4 | |
| 5 | This program decodes and displays PNG files progressively, as if it were |
| 6 | a web browser (though the front end is only set up to read from files). |
| 7 | It supports gamma correction, user-specified background colors, and user- |
| 8 | specified background patterns (for transparent images). This version is |
| 9 | for 32-bit Windows; it may compile under 16-bit Windows with a little |
| 10 | tweaking (or maybe not). Thanks to Adam Costello and Pieter S. van der |
| 11 | Meulen for the "diamond" and "radial waves" patterns, respectively. |
| 12 | |
| 13 | to do (someday, maybe): |
| 14 | - handle quoted command-line args (especially filenames with spaces) |
| 15 | - finish resizable checkerboard-gradient (sizes 4-128?) |
| 16 | - use %.1023s to simplify truncation of title-bar string? |
| 17 | - have minimum window width: oh well |
| 18 | |
| 19 | --------------------------------------------------------------------------- |
| 20 | |
| 21 | Changelog: |
| 22 | - 1.01: initial public release |
| 23 | - 1.02: fixed cut-and-paste error in usage screen (oops...) |
| 24 | - 1.03: modified to allow abbreviated options |
| 25 | - 1.04: removed bogus extra argument from usage fprintf() [Glenn R-P?]; |
| 26 | fixed command-line parsing bug |
| 27 | - 1.10: enabled "message window"/console (thanks to David Geldreich) |
| 28 | - 1.20: added runtime MMX-enabling/disabling and new -mmx* options |
| 29 | - 1.21: made minor tweak to usage screen to fit within 25-line console |
| 30 | - 1.22: added AMD64/EM64T support (__x86_64__) |
| 31 | - 2.00: dual-licensed (added GNU GPL) |
| 32 | - 2.01: fixed 64-bit typo in readpng2.c |
| 33 | - 2.02: fixed improper display of usage screen on PNG error(s); fixed |
| 34 | unexpected-EOF and file-read-error cases |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 35 | - 2.03: removed runtime MMX-enabling/disabling and obsolete -mmx* options |
Matt Sarett | 96be908 | 2016-05-03 13:29:54 -0400 | [diff] [blame^] | 36 | - 2.04: |
| 37 | (GR-P) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 38 | |
| 39 | --------------------------------------------------------------------------- |
| 40 | |
| 41 | Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. |
| 42 | |
| 43 | This software is provided "as is," without warranty of any kind, |
| 44 | express or implied. In no event shall the author or contributors |
| 45 | be held liable for any damages arising in any way from the use of |
| 46 | this software. |
| 47 | |
| 48 | The contents of this file are DUAL-LICENSED. You may modify and/or |
| 49 | redistribute this software according to the terms of one of the |
| 50 | following two licenses (at your option): |
| 51 | |
| 52 | |
| 53 | LICENSE 1 ("BSD-like with advertising clause"): |
| 54 | |
| 55 | Permission is granted to anyone to use this software for any purpose, |
| 56 | including commercial applications, and to alter it and redistribute |
| 57 | it freely, subject to the following restrictions: |
| 58 | |
| 59 | 1. Redistributions of source code must retain the above copyright |
| 60 | notice, disclaimer, and this list of conditions. |
| 61 | 2. Redistributions in binary form must reproduce the above copyright |
| 62 | notice, disclaimer, and this list of conditions in the documenta- |
| 63 | tion and/or other materials provided with the distribution. |
| 64 | 3. All advertising materials mentioning features or use of this |
| 65 | software must display the following acknowledgment: |
| 66 | |
| 67 | This product includes software developed by Greg Roelofs |
| 68 | and contributors for the book, "PNG: The Definitive Guide," |
| 69 | published by O'Reilly and Associates. |
| 70 | |
| 71 | |
| 72 | LICENSE 2 (GNU GPL v2 or later): |
| 73 | |
| 74 | This program is free software; you can redistribute it and/or modify |
| 75 | it under the terms of the GNU General Public License as published by |
| 76 | the Free Software Foundation; either version 2 of the License, or |
| 77 | (at your option) any later version. |
| 78 | |
| 79 | This program is distributed in the hope that it will be useful, |
| 80 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 81 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 82 | GNU General Public License for more details. |
| 83 | |
| 84 | You should have received a copy of the GNU General Public License |
| 85 | along with this program; if not, write to the Free Software Foundation, |
| 86 | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 87 | |
| 88 | ---------------------------------------------------------------------------*/ |
| 89 | |
| 90 | #define PROGNAME "rpng2-win" |
| 91 | #define LONGNAME "Progressive PNG Viewer for Windows" |
| 92 | #define VERSION "2.02 of 16 March 2008" |
| 93 | |
| 94 | #include <stdio.h> |
| 95 | #include <stdlib.h> |
| 96 | #include <string.h> |
| 97 | #include <setjmp.h> /* for jmpbuf declaration in readpng2.h */ |
| 98 | #include <time.h> |
| 99 | #include <math.h> /* only for PvdM background code */ |
| 100 | #include <windows.h> |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 101 | #ifdef __CYGWIN__ |
| 102 | /* getch replacement. Turns out, we don't really need this, |
| 103 | * but leave it here if we ever enable any of the uses of |
| 104 | * _getch in the main code |
| 105 | */ |
| 106 | #include <unistd.h> |
| 107 | #include <termio.h> |
| 108 | #include <sys/ioctl.h> |
| 109 | int repl_getch( void ) |
| 110 | { |
| 111 | char ch; |
| 112 | int fd = fileno(stdin); |
| 113 | struct termio old_tty, new_tty; |
| 114 | |
| 115 | ioctl(fd, TCGETA, &old_tty); |
| 116 | new_tty = old_tty; |
| 117 | new_tty.c_lflag &= ~(ICANON | ECHO | ISIG); |
| 118 | ioctl(fd, TCSETA, &new_tty); |
| 119 | fread(&ch, 1, sizeof(ch), stdin); |
| 120 | ioctl(fd, TCSETA, &old_tty); |
| 121 | |
| 122 | return ch; |
| 123 | } |
| 124 | #define _getch repl_getch |
| 125 | #else |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 126 | #include <conio.h> /* only for _getch() */ |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 127 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 128 | |
| 129 | /* all for PvdM background code: */ |
| 130 | #ifndef PI |
| 131 | # define PI 3.141592653589793238 |
| 132 | #endif |
| 133 | #define PI_2 (PI*0.5) |
| 134 | #define INV_PI_360 (360.0 / PI) |
| 135 | #define MAX(a,b) (a>b?a:b) |
| 136 | #define MIN(a,b) (a<b?a:b) |
| 137 | #define CLIP(a,min,max) MAX(min,MIN((a),max)) |
| 138 | #define ABS(a) ((a)<0?-(a):(a)) |
| 139 | #define CLIP8P(c) MAX(0,(MIN((c),255))) /* 8-bit pos. integer (uch) */ |
| 140 | #define ROUNDF(f) ((int)(f + 0.5)) |
| 141 | |
| 142 | #define rgb1_max bg_freq |
| 143 | #define rgb1_min bg_gray |
| 144 | #define rgb2_max bg_bsat |
| 145 | #define rgb2_min bg_brot |
| 146 | |
| 147 | /* #define DEBUG */ /* this enables the Trace() macros */ |
| 148 | |
| 149 | #include "readpng2.h" /* typedefs, common macros, readpng2 prototypes */ |
| 150 | |
| 151 | |
| 152 | /* could just include png.h, but this macro is the only thing we need |
| 153 | * (name and typedefs changed to local versions); note that side effects |
| 154 | * only happen with alpha (which could easily be avoided with |
| 155 | * "ush acopy = (alpha);") */ |
| 156 | |
| 157 | #define alpha_composite(composite, fg, alpha, bg) { \ |
| 158 | ush temp = ((ush)(fg)*(ush)(alpha) + \ |
| 159 | (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ |
| 160 | (composite) = (uch)((temp + (temp >> 8)) >> 8); \ |
| 161 | } |
| 162 | |
| 163 | |
| 164 | #define INBUFSIZE 4096 /* with pseudo-timing on (1 sec delay/block), this |
| 165 | * block size corresponds roughly to a download |
| 166 | * speed 10% faster than theoretical 33.6K maximum |
| 167 | * (assuming 8 data bits, 1 stop bit and no other |
| 168 | * overhead) */ |
| 169 | |
| 170 | /* local prototypes */ |
| 171 | static void rpng2_win_init(void); |
| 172 | static int rpng2_win_create_window(void); |
| 173 | static int rpng2_win_load_bg_image(void); |
| 174 | static void rpng2_win_display_row(ulg row); |
| 175 | static void rpng2_win_finish_display(void); |
| 176 | static void rpng2_win_cleanup(void); |
| 177 | LRESULT CALLBACK rpng2_win_wndproc(HWND, UINT, WPARAM, LPARAM); |
| 178 | |
| 179 | |
| 180 | static char titlebar[1024]; |
| 181 | static char *progname = PROGNAME; |
| 182 | static char *appname = LONGNAME; |
| 183 | static char *filename; |
| 184 | static FILE *infile; |
| 185 | |
| 186 | static mainprog_info rpng2_info; |
| 187 | |
| 188 | static uch inbuf[INBUFSIZE]; |
| 189 | static int incount; |
| 190 | |
| 191 | static int pat = 6; /* must be less than num_bgpat */ |
| 192 | static int bg_image = 0; |
| 193 | static int bgscale = 16; |
| 194 | static ulg bg_rowbytes; |
| 195 | static uch *bg_data; |
| 196 | |
| 197 | static struct rgb_color { |
| 198 | uch r, g, b; |
| 199 | } rgb[] = { |
| 200 | { 0, 0, 0}, /* 0: black */ |
| 201 | {255, 255, 255}, /* 1: white */ |
| 202 | {173, 132, 57}, /* 2: tan */ |
| 203 | { 64, 132, 0}, /* 3: medium green */ |
| 204 | {189, 117, 1}, /* 4: gold */ |
| 205 | {253, 249, 1}, /* 5: yellow */ |
| 206 | { 0, 0, 255}, /* 6: blue */ |
| 207 | { 0, 0, 120}, /* 7: medium blue */ |
| 208 | {255, 0, 255}, /* 8: magenta */ |
| 209 | { 64, 0, 64}, /* 9: dark magenta */ |
| 210 | {255, 0, 0}, /* 10: red */ |
| 211 | { 64, 0, 0}, /* 11: dark red */ |
| 212 | {255, 127, 0}, /* 12: orange */ |
| 213 | {192, 96, 0}, /* 13: darker orange */ |
| 214 | { 24, 60, 0}, /* 14: dark green-yellow */ |
| 215 | { 85, 125, 200} /* 15: ice blue */ |
| 216 | }; |
| 217 | /* not used for now, but should be for error-checking: |
| 218 | static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color); |
| 219 | */ |
| 220 | |
| 221 | /* |
| 222 | This whole struct is a fairly cheesy way to keep the number of |
| 223 | command-line options to a minimum. The radial-waves background |
| 224 | type is a particularly poor fit to the integer elements of the |
| 225 | struct...but a few macros and a little fixed-point math will do |
| 226 | wonders for ya. |
| 227 | |
| 228 | type bits: |
| 229 | F E D C B A 9 8 7 6 5 4 3 2 1 0 |
| 230 | | | | | | |
| 231 | | | +-+-+-- 0 = sharp-edged checkerboard |
| 232 | | | 1 = soft diamonds |
| 233 | | | 2 = radial waves |
| 234 | | | 3-7 = undefined |
| 235 | | +-- gradient #2 inverted? |
| 236 | +-- alternating columns inverted? |
| 237 | */ |
| 238 | static struct background_pattern { |
| 239 | ush type; |
| 240 | int rgb1_max, rgb1_min; /* or bg_freq, bg_gray */ |
| 241 | int rgb2_max, rgb2_min; /* or bg_bsat, bg_brot (both scaled by 10)*/ |
| 242 | } bg[] = { |
| 243 | {0+8, 2,0, 1,15}, /* checkered: tan/black vs. white/ice blue */ |
| 244 | {0+24, 2,0, 1,0}, /* checkered: tan/black vs. white/black */ |
| 245 | {0+8, 4,5, 0,2}, /* checkered: gold/yellow vs. black/tan */ |
| 246 | {0+8, 4,5, 0,6}, /* checkered: gold/yellow vs. black/blue */ |
| 247 | {0, 7,0, 8,9}, /* checkered: deep blue/black vs. magenta */ |
| 248 | {0+8, 13,0, 5,14}, /* checkered: orange/black vs. yellow */ |
| 249 | {0+8, 12,0, 10,11}, /* checkered: orange/black vs. red */ |
| 250 | {1, 7,0, 8,0}, /* diamonds: deep blue/black vs. magenta */ |
| 251 | {1, 12,0, 11,0}, /* diamonds: orange vs. dark red */ |
| 252 | {1, 10,0, 7,0}, /* diamonds: red vs. medium blue */ |
| 253 | {1, 4,0, 5,0}, /* diamonds: gold vs. yellow */ |
| 254 | {1, 3,0, 0,0}, /* diamonds: medium green vs. black */ |
| 255 | {2, 16, 100, 20, 0}, /* radial: ~hard radial color-beams */ |
| 256 | {2, 18, 100, 10, 2}, /* radial: soft, curved radial color-beams */ |
| 257 | {2, 16, 256, 100, 250}, /* radial: very tight spiral */ |
| 258 | {2, 10000, 256, 11, 0} /* radial: dipole-moire' (almost fractal) */ |
| 259 | }; |
| 260 | static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern); |
| 261 | |
| 262 | |
| 263 | /* Windows-specific global variables (could go in struct, but messy...) */ |
| 264 | static ulg wimage_rowbytes; |
| 265 | static uch *dib; |
| 266 | static uch *wimage_data; |
| 267 | static BITMAPINFOHEADER *bmih; |
| 268 | |
| 269 | static HWND global_hwnd; |
| 270 | static HINSTANCE global_hInst; |
| 271 | static int global_showmode; |
| 272 | |
| 273 | |
| 274 | |
| 275 | |
| 276 | int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) |
| 277 | { |
| 278 | char *args[1024]; /* arbitrary limit, but should suffice */ |
| 279 | char **argv = args; |
| 280 | char *p, *q, *bgstr = NULL; |
| 281 | int argc = 0; |
| 282 | int rc, alen, flen; |
| 283 | int error = 0; |
| 284 | int timing = FALSE; |
| 285 | int have_bg = FALSE; |
| 286 | double LUT_exponent; /* just the lookup table */ |
| 287 | double CRT_exponent = 2.2; /* just the monitor */ |
| 288 | double default_display_exponent; /* whole display system */ |
| 289 | MSG msg; |
| 290 | |
| 291 | |
| 292 | /* First initialize a few things, just to be sure--memset takes care of |
| 293 | * default background color (black), booleans (FALSE), pointers (NULL), |
| 294 | * etc. */ |
| 295 | |
| 296 | global_hInst = hInst; |
| 297 | global_showmode = showmode; |
| 298 | filename = (char *)NULL; |
| 299 | memset(&rpng2_info, 0, sizeof(mainprog_info)); |
| 300 | |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 301 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 302 | /* Next reenable console output, which normally goes to the bit bucket |
| 303 | * for windowed apps. Closing the console window will terminate the |
| 304 | * app. Thanks to David.Geldreich@realviz.com for supplying the magical |
| 305 | * incantation. */ |
| 306 | |
| 307 | AllocConsole(); |
| 308 | freopen("CONOUT$", "a", stderr); |
| 309 | freopen("CONOUT$", "a", stdout); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 310 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 311 | |
| 312 | /* Set the default value for our display-system exponent, i.e., the |
| 313 | * product of the CRT exponent and the exponent corresponding to |
| 314 | * the frame-buffer's lookup table (LUT), if any. This is not an |
| 315 | * exhaustive list of LUT values (e.g., OpenStep has a lot of weird |
| 316 | * ones), but it should cover 99% of the current possibilities. And |
| 317 | * yes, these ifdefs are completely wasted in a Windows program... */ |
| 318 | |
| 319 | #if defined(NeXT) |
| 320 | /* third-party utilities can modify the default LUT exponent */ |
| 321 | LUT_exponent = 1.0 / 2.2; |
| 322 | /* |
| 323 | if (some_next_function_that_returns_gamma(&next_gamma)) |
| 324 | LUT_exponent = 1.0 / next_gamma; |
| 325 | */ |
| 326 | #elif defined(sgi) |
| 327 | LUT_exponent = 1.0 / 1.7; |
| 328 | /* there doesn't seem to be any documented function to |
| 329 | * get the "gamma" value, so we do it the hard way */ |
| 330 | infile = fopen("/etc/config/system.glGammaVal", "r"); |
| 331 | if (infile) { |
| 332 | double sgi_gamma; |
| 333 | |
| 334 | fgets(tmpline, 80, infile); |
| 335 | fclose(infile); |
| 336 | sgi_gamma = atof(tmpline); |
| 337 | if (sgi_gamma > 0.0) |
| 338 | LUT_exponent = 1.0 / sgi_gamma; |
| 339 | } |
| 340 | #elif defined(Macintosh) |
| 341 | LUT_exponent = 1.8 / 2.61; |
| 342 | /* |
| 343 | if (some_mac_function_that_returns_gamma(&mac_gamma)) |
| 344 | LUT_exponent = mac_gamma / 2.61; |
| 345 | */ |
| 346 | #else |
| 347 | LUT_exponent = 1.0; /* assume no LUT: most PCs */ |
| 348 | #endif |
| 349 | |
| 350 | /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ |
| 351 | default_display_exponent = LUT_exponent * CRT_exponent; |
| 352 | |
| 353 | |
| 354 | /* If the user has set the SCREEN_GAMMA environment variable as suggested |
| 355 | * (somewhat imprecisely) in the libpng documentation, use that; otherwise |
| 356 | * use the default value we just calculated. Either way, the user may |
| 357 | * override this via a command-line option. */ |
| 358 | |
| 359 | if ((p = getenv("SCREEN_GAMMA")) != NULL) |
| 360 | rpng2_info.display_exponent = atof(p); |
| 361 | else |
| 362 | rpng2_info.display_exponent = default_display_exponent; |
| 363 | |
| 364 | |
| 365 | /* Windows really hates command lines, so we have to set up our own argv. |
| 366 | * Note that we do NOT bother with quoted arguments here, so don't use |
| 367 | * filenames with spaces in 'em! */ |
| 368 | |
| 369 | argv[argc++] = PROGNAME; |
| 370 | p = cmd; |
| 371 | for (;;) { |
| 372 | if (*p == ' ') |
| 373 | while (*++p == ' ') |
| 374 | ; |
| 375 | /* now p points at the first non-space after some spaces */ |
| 376 | if (*p == '\0') |
| 377 | break; /* nothing after the spaces: done */ |
| 378 | argv[argc++] = q = p; |
| 379 | while (*q && *q != ' ') |
| 380 | ++q; |
| 381 | /* now q points at a space or the end of the string */ |
| 382 | if (*q == '\0') |
| 383 | break; /* last argv already terminated; quit */ |
| 384 | *q = '\0'; /* change space to terminator */ |
| 385 | p = q + 1; |
| 386 | } |
| 387 | argv[argc] = NULL; /* terminate the argv array itself */ |
| 388 | |
| 389 | |
| 390 | /* Now parse the command line for options and the PNG filename. */ |
| 391 | |
| 392 | while (*++argv && !error) { |
| 393 | if (!strncmp(*argv, "-gamma", 2)) { |
| 394 | if (!*++argv) |
| 395 | ++error; |
| 396 | else { |
| 397 | rpng2_info.display_exponent = atof(*argv); |
| 398 | if (rpng2_info.display_exponent <= 0.0) |
| 399 | ++error; |
| 400 | } |
| 401 | } else if (!strncmp(*argv, "-bgcolor", 4)) { |
| 402 | if (!*++argv) |
| 403 | ++error; |
| 404 | else { |
| 405 | bgstr = *argv; |
| 406 | if (strlen(bgstr) != 7 || bgstr[0] != '#') |
| 407 | ++error; |
| 408 | else { |
| 409 | have_bg = TRUE; |
| 410 | bg_image = FALSE; |
| 411 | } |
| 412 | } |
| 413 | } else if (!strncmp(*argv, "-bgpat", 4)) { |
| 414 | if (!*++argv) |
| 415 | ++error; |
| 416 | else { |
| 417 | pat = atoi(*argv) - 1; |
| 418 | if (pat < 0 || pat >= num_bgpat) |
| 419 | ++error; |
| 420 | else { |
| 421 | bg_image = TRUE; |
| 422 | have_bg = FALSE; |
| 423 | } |
| 424 | } |
| 425 | } else if (!strncmp(*argv, "-timing", 2)) { |
| 426 | timing = TRUE; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 427 | } else { |
| 428 | if (**argv != '-') { |
| 429 | filename = *argv; |
| 430 | if (argv[1]) /* shouldn't be any more args after filename */ |
| 431 | ++error; |
| 432 | } else |
| 433 | ++error; /* not expecting any other options */ |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | if (!filename) |
| 438 | ++error; |
| 439 | |
| 440 | |
| 441 | /* print usage screen if any errors up to this point */ |
| 442 | |
| 443 | if (error) { |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 444 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 445 | int ch; |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 446 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 447 | |
| 448 | fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); |
| 449 | readpng2_version_info(); |
| 450 | fprintf(stderr, "\n" |
| 451 | "Usage: %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 452 | " %*s file.png\n\n" |
| 453 | " exp \ttransfer-function exponent (``gamma'') of the display\n" |
| 454 | "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" |
| 455 | "\t\t to the product of the lookup-table exponent (varies)\n" |
| 456 | "\t\t and the CRT exponent (usually 2.2); must be positive\n" |
| 457 | " bg \tdesired background color in 7-character hex RGB format\n" |
| 458 | "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" |
| 459 | "\t\t used with transparent images; overrides -bgpat option\n" |
| 460 | " pat \tdesired background pattern number (1-%d); used with\n" |
| 461 | "\t\t transparent images; overrides -bgcolor option\n" |
| 462 | " -timing\tenables delay for every block read, to simulate modem\n" |
| 463 | "\t\t download of image (~36 Kbps)\n" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 464 | "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n" |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 465 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 466 | "Press Q or Esc to quit this usage screen. ", |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 467 | #else |
| 468 | , |
| 469 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 470 | PROGNAME, |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 471 | #if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \ |
| 472 | !(defined(__CYGWIN__) || defined(__MINGW32__)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 473 | (int)strlen(PROGNAME), " ", |
| 474 | #endif |
| 475 | (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat); |
| 476 | fflush(stderr); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 477 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 478 | do |
| 479 | ch = _getch(); |
| 480 | while (ch != 'q' && ch != 'Q' && ch != 0x1B); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 481 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 482 | exit(1); |
| 483 | } |
| 484 | |
| 485 | |
| 486 | if (!(infile = fopen(filename, "rb"))) { |
| 487 | fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); |
| 488 | ++error; |
| 489 | } else { |
| 490 | incount = fread(inbuf, 1, INBUFSIZE, infile); |
| 491 | if (incount < 8 || !readpng2_check_sig(inbuf, 8)) { |
| 492 | fprintf(stderr, PROGNAME |
| 493 | ": [%s] is not a PNG file: incorrect signature\n", |
| 494 | filename); |
| 495 | ++error; |
| 496 | } else if ((rc = readpng2_init(&rpng2_info)) != 0) { |
| 497 | switch (rc) { |
| 498 | case 2: |
| 499 | fprintf(stderr, PROGNAME |
| 500 | ": [%s] has bad IHDR (libpng longjmp)\n", filename); |
| 501 | break; |
| 502 | case 4: |
| 503 | fprintf(stderr, PROGNAME ": insufficient memory\n"); |
| 504 | break; |
| 505 | default: |
| 506 | fprintf(stderr, PROGNAME |
| 507 | ": unknown readpng2_init() error\n"); |
| 508 | break; |
| 509 | } |
| 510 | ++error; |
| 511 | } |
| 512 | if (error) |
| 513 | fclose(infile); |
| 514 | } |
| 515 | |
| 516 | |
| 517 | if (error) { |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 518 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 519 | int ch; |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 520 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 521 | |
| 522 | fprintf(stderr, PROGNAME ": aborting.\n"); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 523 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 524 | do |
| 525 | ch = _getch(); |
| 526 | while (ch != 'q' && ch != 'Q' && ch != 0x1B); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 527 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 528 | exit(2); |
| 529 | } else { |
| 530 | fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 531 | #ifndef __CYGWIN__ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 532 | fprintf(stderr, |
| 533 | "\n [console window: closing this window will terminate %s]\n\n", |
| 534 | PROGNAME); |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 535 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 536 | fflush(stderr); |
| 537 | } |
| 538 | |
| 539 | |
| 540 | /* set the title-bar string, but make sure buffer doesn't overflow */ |
| 541 | |
| 542 | alen = strlen(appname); |
| 543 | flen = strlen(filename); |
| 544 | if (alen + flen + 3 > 1023) |
| 545 | sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); |
| 546 | else |
| 547 | sprintf(titlebar, "%s: %s", appname, filename); |
| 548 | |
| 549 | |
| 550 | /* set some final rpng2_info variables before entering main data loop */ |
| 551 | |
| 552 | if (have_bg) { |
| 553 | unsigned r, g, b; /* this approach quiets compiler warnings */ |
| 554 | |
| 555 | sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); |
| 556 | rpng2_info.bg_red = (uch)r; |
| 557 | rpng2_info.bg_green = (uch)g; |
| 558 | rpng2_info.bg_blue = (uch)b; |
| 559 | } else |
| 560 | rpng2_info.need_bgcolor = TRUE; |
| 561 | |
| 562 | rpng2_info.state = kPreInit; |
| 563 | rpng2_info.mainprog_init = rpng2_win_init; |
| 564 | rpng2_info.mainprog_display_row = rpng2_win_display_row; |
| 565 | rpng2_info.mainprog_finish_display = rpng2_win_finish_display; |
| 566 | |
| 567 | |
| 568 | /* OK, this is the fun part: call readpng2_decode_data() at the start of |
| 569 | * the loop to deal with our first buffer of data (read in above to verify |
| 570 | * that the file is a PNG image), then loop through the file and continue |
| 571 | * calling the same routine to handle each chunk of data. It in turn |
| 572 | * passes the data to libpng, which will invoke one or more of our call- |
| 573 | * backs as decoded data become available. We optionally call Sleep() for |
| 574 | * one second per iteration to simulate downloading the image via an analog |
| 575 | * modem. */ |
| 576 | |
| 577 | for (;;) { |
| 578 | Trace((stderr, "about to call readpng2_decode_data()\n")) |
| 579 | if (readpng2_decode_data(&rpng2_info, inbuf, incount)) |
| 580 | ++error; |
| 581 | Trace((stderr, "done with readpng2_decode_data()\n")) |
| 582 | |
| 583 | if (error || incount != INBUFSIZE || rpng2_info.state == kDone) { |
| 584 | if (rpng2_info.state == kDone) { |
| 585 | Trace((stderr, "done decoding PNG image\n")) |
| 586 | } else if (ferror(infile)) { |
| 587 | fprintf(stderr, PROGNAME |
| 588 | ": error while reading PNG image file\n"); |
| 589 | exit(3); |
| 590 | } else if (feof(infile)) { |
| 591 | fprintf(stderr, PROGNAME ": end of file reached " |
| 592 | "(unexpectedly) while reading PNG image file\n"); |
| 593 | exit(3); |
| 594 | } else /* if (error) */ { |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 595 | /* will print error message below */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 596 | } |
| 597 | break; |
| 598 | } |
| 599 | |
| 600 | if (timing) |
| 601 | Sleep(1000L); |
| 602 | |
| 603 | incount = fread(inbuf, 1, INBUFSIZE, infile); |
| 604 | } |
| 605 | |
| 606 | |
| 607 | /* clean up PNG stuff and report any decoding errors */ |
| 608 | |
| 609 | fclose(infile); |
| 610 | Trace((stderr, "about to call readpng2_cleanup()\n")) |
| 611 | readpng2_cleanup(&rpng2_info); |
| 612 | |
| 613 | if (error) { |
| 614 | fprintf(stderr, PROGNAME ": libpng error while decoding PNG image\n"); |
| 615 | exit(3); |
| 616 | } |
| 617 | |
| 618 | |
| 619 | /* wait for the user to tell us when to quit */ |
| 620 | |
| 621 | while (GetMessage(&msg, NULL, 0, 0)) { |
| 622 | TranslateMessage(&msg); |
| 623 | DispatchMessage(&msg); |
| 624 | } |
| 625 | |
| 626 | |
| 627 | /* we're done: clean up all image and Windows resources and go away */ |
| 628 | |
| 629 | Trace((stderr, "about to call rpng2_win_cleanup()\n")) |
| 630 | rpng2_win_cleanup(); |
| 631 | |
| 632 | return msg.wParam; |
| 633 | } |
| 634 | |
| 635 | |
| 636 | |
| 637 | |
| 638 | |
| 639 | /* this function is called by readpng2_info_callback() in readpng2.c, which |
| 640 | * in turn is called by libpng after all of the pre-IDAT chunks have been |
| 641 | * read and processed--i.e., we now have enough info to finish initializing */ |
| 642 | |
| 643 | static void rpng2_win_init() |
| 644 | { |
| 645 | ulg i; |
| 646 | ulg rowbytes = rpng2_info.rowbytes; |
| 647 | |
| 648 | Trace((stderr, "beginning rpng2_win_init()\n")) |
| 649 | Trace((stderr, " rowbytes = %d\n", rpng2_info.rowbytes)) |
| 650 | Trace((stderr, " width = %ld\n", rpng2_info.width)) |
| 651 | Trace((stderr, " height = %ld\n", rpng2_info.height)) |
| 652 | |
| 653 | rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); |
| 654 | if (!rpng2_info.image_data) { |
| 655 | readpng2_cleanup(&rpng2_info); |
| 656 | return; |
| 657 | } |
| 658 | |
| 659 | rpng2_info.row_pointers = (uch **)malloc(rpng2_info.height * sizeof(uch *)); |
| 660 | if (!rpng2_info.row_pointers) { |
| 661 | free(rpng2_info.image_data); |
| 662 | rpng2_info.image_data = NULL; |
| 663 | readpng2_cleanup(&rpng2_info); |
| 664 | return; |
| 665 | } |
| 666 | |
| 667 | for (i = 0; i < rpng2_info.height; ++i) |
| 668 | rpng2_info.row_pointers[i] = rpng2_info.image_data + i*rowbytes; |
| 669 | |
| 670 | /*--------------------------------------------------------------------------- |
| 671 | Do the basic Windows initialization stuff, make the window, and fill it |
| 672 | with the user-specified, file-specified or default background color. |
| 673 | ---------------------------------------------------------------------------*/ |
| 674 | |
| 675 | if (rpng2_win_create_window()) { |
| 676 | readpng2_cleanup(&rpng2_info); |
| 677 | return; |
| 678 | } |
| 679 | |
| 680 | rpng2_info.state = kWindowInit; |
| 681 | } |
| 682 | |
| 683 | |
| 684 | |
| 685 | |
| 686 | |
| 687 | static int rpng2_win_create_window() |
| 688 | { |
| 689 | uch bg_red = rpng2_info.bg_red; |
| 690 | uch bg_green = rpng2_info.bg_green; |
| 691 | uch bg_blue = rpng2_info.bg_blue; |
| 692 | uch *dest; |
| 693 | int extra_width, extra_height; |
| 694 | ulg i, j; |
| 695 | WNDCLASSEX wndclass; |
| 696 | RECT rect; |
| 697 | |
| 698 | |
| 699 | /*--------------------------------------------------------------------------- |
| 700 | Allocate memory for the display-specific version of the image (round up |
| 701 | to multiple of 4 for Windows DIB). |
| 702 | ---------------------------------------------------------------------------*/ |
| 703 | |
| 704 | wimage_rowbytes = ((3*rpng2_info.width + 3L) >> 2) << 2; |
| 705 | |
| 706 | if (!(dib = (uch *)malloc(sizeof(BITMAPINFOHEADER) + |
| 707 | wimage_rowbytes*rpng2_info.height))) |
| 708 | { |
| 709 | return 4; /* fail */ |
| 710 | } |
| 711 | |
| 712 | /*--------------------------------------------------------------------------- |
| 713 | Initialize the DIB. Negative height means to use top-down BMP ordering |
| 714 | (must be uncompressed, but that's what we want). Bit count of 1, 4 or 8 |
| 715 | implies a colormap of RGBX quads, but 24-bit BMPs just use B,G,R values |
| 716 | directly => wimage_data begins immediately after BMP header. |
| 717 | ---------------------------------------------------------------------------*/ |
| 718 | |
| 719 | memset(dib, 0, sizeof(BITMAPINFOHEADER)); |
| 720 | bmih = (BITMAPINFOHEADER *)dib; |
| 721 | bmih->biSize = sizeof(BITMAPINFOHEADER); |
| 722 | bmih->biWidth = rpng2_info.width; |
| 723 | bmih->biHeight = -((long)rpng2_info.height); |
| 724 | bmih->biPlanes = 1; |
| 725 | bmih->biBitCount = 24; |
| 726 | bmih->biCompression = 0; |
| 727 | wimage_data = dib + sizeof(BITMAPINFOHEADER); |
| 728 | |
| 729 | /*--------------------------------------------------------------------------- |
| 730 | Fill window with the specified background color (default is black), but |
| 731 | defer loading faked "background image" until window is displayed (may be |
| 732 | slow to compute). Data are in BGR order. |
| 733 | ---------------------------------------------------------------------------*/ |
| 734 | |
| 735 | if (bg_image) { /* just fill with black for now */ |
| 736 | memset(wimage_data, 0, wimage_rowbytes*rpng2_info.height); |
| 737 | } else { |
| 738 | for (j = 0; j < rpng2_info.height; ++j) { |
| 739 | dest = wimage_data + j*wimage_rowbytes; |
| 740 | for (i = rpng2_info.width; i > 0; --i) { |
| 741 | *dest++ = bg_blue; |
| 742 | *dest++ = bg_green; |
| 743 | *dest++ = bg_red; |
| 744 | } |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | /*--------------------------------------------------------------------------- |
| 749 | Set the window parameters. |
| 750 | ---------------------------------------------------------------------------*/ |
| 751 | |
| 752 | memset(&wndclass, 0, sizeof(wndclass)); |
| 753 | |
| 754 | wndclass.cbSize = sizeof(wndclass); |
| 755 | wndclass.style = CS_HREDRAW | CS_VREDRAW; |
| 756 | wndclass.lpfnWndProc = rpng2_win_wndproc; |
| 757 | wndclass.hInstance = global_hInst; |
| 758 | wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); |
| 759 | wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); |
| 760 | wndclass.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH); |
| 761 | wndclass.lpszMenuName = NULL; |
| 762 | wndclass.lpszClassName = progname; |
| 763 | wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION); |
| 764 | |
| 765 | RegisterClassEx(&wndclass); |
| 766 | |
| 767 | /*--------------------------------------------------------------------------- |
| 768 | Finally, create the window. |
| 769 | ---------------------------------------------------------------------------*/ |
| 770 | |
| 771 | extra_width = 2*(GetSystemMetrics(SM_CXBORDER) + |
| 772 | GetSystemMetrics(SM_CXDLGFRAME)); |
| 773 | extra_height = 2*(GetSystemMetrics(SM_CYBORDER) + |
| 774 | GetSystemMetrics(SM_CYDLGFRAME)) + |
| 775 | GetSystemMetrics(SM_CYCAPTION); |
| 776 | |
| 777 | global_hwnd = CreateWindow(progname, titlebar, WS_OVERLAPPEDWINDOW, |
| 778 | CW_USEDEFAULT, CW_USEDEFAULT, rpng2_info.width+extra_width, |
| 779 | rpng2_info.height+extra_height, NULL, NULL, global_hInst, NULL); |
| 780 | |
| 781 | ShowWindow(global_hwnd, global_showmode); |
| 782 | UpdateWindow(global_hwnd); |
| 783 | |
| 784 | /*--------------------------------------------------------------------------- |
| 785 | Now compute the background image and display it. If it fails (memory |
| 786 | allocation), revert to a plain background color. |
| 787 | ---------------------------------------------------------------------------*/ |
| 788 | |
| 789 | if (bg_image) { |
| 790 | static const char *msg = "Computing background image..."; |
| 791 | int x, y, len = strlen(msg); |
| 792 | HDC hdc = GetDC(global_hwnd); |
| 793 | TEXTMETRIC tm; |
| 794 | |
| 795 | GetTextMetrics(hdc, &tm); |
| 796 | x = (rpng2_info.width - len*tm.tmAveCharWidth)/2; |
| 797 | y = (rpng2_info.height - tm.tmHeight)/2; |
| 798 | SetBkMode(hdc, TRANSPARENT); |
| 799 | SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT)); |
| 800 | /* this can still begin out of bounds even if x is positive (???): */ |
| 801 | TextOut(hdc, ((x < 0)? 0 : x), ((y < 0)? 0 : y), msg, len); |
| 802 | ReleaseDC(global_hwnd, hdc); |
| 803 | |
| 804 | rpng2_win_load_bg_image(); /* resets bg_image if fails */ |
| 805 | } |
| 806 | |
| 807 | if (!bg_image) { |
| 808 | for (j = 0; j < rpng2_info.height; ++j) { |
| 809 | dest = wimage_data + j*wimage_rowbytes; |
| 810 | for (i = rpng2_info.width; i > 0; --i) { |
| 811 | *dest++ = bg_blue; |
| 812 | *dest++ = bg_green; |
| 813 | *dest++ = bg_red; |
| 814 | } |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | rect.left = 0L; |
| 819 | rect.top = 0L; |
| 820 | rect.right = (LONG)rpng2_info.width; /* possibly off by one? */ |
| 821 | rect.bottom = (LONG)rpng2_info.height; /* possibly off by one? */ |
| 822 | InvalidateRect(global_hwnd, &rect, FALSE); |
| 823 | UpdateWindow(global_hwnd); /* similar to XFlush() */ |
| 824 | |
| 825 | return 0; |
| 826 | |
| 827 | } /* end function rpng2_win_create_window() */ |
| 828 | |
| 829 | |
| 830 | |
| 831 | |
| 832 | |
| 833 | static int rpng2_win_load_bg_image() |
| 834 | { |
| 835 | uch *src, *dest; |
| 836 | uch r1, r2, g1, g2, b1, b2; |
| 837 | uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; |
| 838 | int k, hmax, max; |
| 839 | int xidx, yidx, yidx_max = (bgscale-1); |
| 840 | int even_odd_vert, even_odd_horiz, even_odd; |
| 841 | int invert_gradient2 = (bg[pat].type & 0x08); |
| 842 | int invert_column; |
| 843 | ulg i, row; |
| 844 | |
| 845 | /*--------------------------------------------------------------------------- |
| 846 | Allocate buffer for fake background image to be used with transparent |
| 847 | images; if this fails, revert to plain background color. |
| 848 | ---------------------------------------------------------------------------*/ |
| 849 | |
| 850 | bg_rowbytes = 3 * rpng2_info.width; |
| 851 | bg_data = (uch *)malloc(bg_rowbytes * rpng2_info.height); |
| 852 | if (!bg_data) { |
| 853 | fprintf(stderr, PROGNAME |
| 854 | ": unable to allocate memory for background image\n"); |
| 855 | bg_image = 0; |
| 856 | return 1; |
| 857 | } |
| 858 | |
| 859 | /*--------------------------------------------------------------------------- |
| 860 | Vertical gradients (ramps) in NxN squares, alternating direction and |
| 861 | colors (N == bgscale). |
| 862 | ---------------------------------------------------------------------------*/ |
| 863 | |
| 864 | if ((bg[pat].type & 0x07) == 0) { |
| 865 | uch r1_min = rgb[bg[pat].rgb1_min].r; |
| 866 | uch g1_min = rgb[bg[pat].rgb1_min].g; |
| 867 | uch b1_min = rgb[bg[pat].rgb1_min].b; |
| 868 | uch r2_min = rgb[bg[pat].rgb2_min].r; |
| 869 | uch g2_min = rgb[bg[pat].rgb2_min].g; |
| 870 | uch b2_min = rgb[bg[pat].rgb2_min].b; |
| 871 | int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; |
| 872 | int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; |
| 873 | int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; |
| 874 | int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; |
| 875 | int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; |
| 876 | int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; |
| 877 | |
| 878 | for (row = 0; row < rpng2_info.height; ++row) { |
| 879 | yidx = row % bgscale; |
| 880 | even_odd_vert = (row / bgscale) & 1; |
| 881 | |
| 882 | r1 = r1_min + (r1_diff * yidx) / yidx_max; |
| 883 | g1 = g1_min + (g1_diff * yidx) / yidx_max; |
| 884 | b1 = b1_min + (b1_diff * yidx) / yidx_max; |
| 885 | r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; |
| 886 | g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; |
| 887 | b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; |
| 888 | |
| 889 | r2 = r2_min + (r2_diff * yidx) / yidx_max; |
| 890 | g2 = g2_min + (g2_diff * yidx) / yidx_max; |
| 891 | b2 = b2_min + (b2_diff * yidx) / yidx_max; |
| 892 | r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; |
| 893 | g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; |
| 894 | b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; |
| 895 | |
| 896 | dest = bg_data + row*bg_rowbytes; |
| 897 | for (i = 0; i < rpng2_info.width; ++i) { |
| 898 | even_odd_horiz = (i / bgscale) & 1; |
| 899 | even_odd = even_odd_vert ^ even_odd_horiz; |
| 900 | invert_column = |
| 901 | (even_odd_horiz && (bg[pat].type & 0x10)); |
| 902 | if (even_odd == 0) { /* gradient #1 */ |
| 903 | if (invert_column) { |
| 904 | *dest++ = r1_inv; |
| 905 | *dest++ = g1_inv; |
| 906 | *dest++ = b1_inv; |
| 907 | } else { |
| 908 | *dest++ = r1; |
| 909 | *dest++ = g1; |
| 910 | *dest++ = b1; |
| 911 | } |
| 912 | } else { /* gradient #2 */ |
| 913 | if ((invert_column && invert_gradient2) || |
| 914 | (!invert_column && !invert_gradient2)) |
| 915 | { |
| 916 | *dest++ = r2; /* not inverted or */ |
| 917 | *dest++ = g2; /* doubly inverted */ |
| 918 | *dest++ = b2; |
| 919 | } else { |
| 920 | *dest++ = r2_inv; |
| 921 | *dest++ = g2_inv; /* singly inverted */ |
| 922 | *dest++ = b2_inv; |
| 923 | } |
| 924 | } |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | /*--------------------------------------------------------------------------- |
| 929 | Soft gradient-diamonds with scale = bgscale. Code contributed by Adam |
| 930 | M. Costello. |
| 931 | ---------------------------------------------------------------------------*/ |
| 932 | |
| 933 | } else if ((bg[pat].type & 0x07) == 1) { |
| 934 | |
| 935 | hmax = (bgscale-1)/2; /* half the max weight of a color */ |
| 936 | max = 2*hmax; /* the max weight of a color */ |
| 937 | |
| 938 | r1 = rgb[bg[pat].rgb1_max].r; |
| 939 | g1 = rgb[bg[pat].rgb1_max].g; |
| 940 | b1 = rgb[bg[pat].rgb1_max].b; |
| 941 | r2 = rgb[bg[pat].rgb2_max].r; |
| 942 | g2 = rgb[bg[pat].rgb2_max].g; |
| 943 | b2 = rgb[bg[pat].rgb2_max].b; |
| 944 | |
| 945 | for (row = 0; row < rpng2_info.height; ++row) { |
| 946 | yidx = row % bgscale; |
| 947 | if (yidx > hmax) |
| 948 | yidx = bgscale-1 - yidx; |
| 949 | dest = bg_data + row*bg_rowbytes; |
| 950 | for (i = 0; i < rpng2_info.width; ++i) { |
| 951 | xidx = i % bgscale; |
| 952 | if (xidx > hmax) |
| 953 | xidx = bgscale-1 - xidx; |
| 954 | k = xidx + yidx; |
| 955 | *dest++ = (k*r1 + (max-k)*r2) / max; |
| 956 | *dest++ = (k*g1 + (max-k)*g2) / max; |
| 957 | *dest++ = (k*b1 + (max-k)*b2) / max; |
| 958 | } |
| 959 | } |
| 960 | |
| 961 | /*--------------------------------------------------------------------------- |
| 962 | Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- |
| 963 | soids will equal bgscale?]. This one is slow but very cool. Code con- |
| 964 | tributed by Pieter S. van der Meulen (originally in Smalltalk). |
| 965 | ---------------------------------------------------------------------------*/ |
| 966 | |
| 967 | } else if ((bg[pat].type & 0x07) == 2) { |
| 968 | uch ch; |
| 969 | int ii, x, y, hw, hh, grayspot; |
| 970 | double freq, rotate, saturate, gray, intensity; |
| 971 | double angle=0.0, aoffset=0.0, maxDist, dist; |
| 972 | double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; |
| 973 | |
| 974 | fprintf(stderr, "%s: computing radial background...", |
| 975 | PROGNAME); |
| 976 | fflush(stderr); |
| 977 | |
| 978 | hh = rpng2_info.height / 2; |
| 979 | hw = rpng2_info.width / 2; |
| 980 | |
| 981 | /* variables for radial waves: |
| 982 | * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] |
| 983 | * freq: number of color beams originating from the center |
| 984 | * grayspot: size of the graying center area (anti-alias) |
| 985 | * rotate: rotation of the beams as a function of radius |
| 986 | * saturate: saturation of beams' shape azimuthally |
| 987 | */ |
| 988 | angle = CLIP(angle, 0.0, 360.0); |
| 989 | grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); |
| 990 | freq = MAX((double)bg[pat].bg_freq, 0.0); |
| 991 | saturate = (double)bg[pat].bg_bsat * 0.1; |
| 992 | rotate = (double)bg[pat].bg_brot * 0.1; |
| 993 | gray = 0.0; |
| 994 | intensity = 0.0; |
| 995 | maxDist = (double)((hw*hw) + (hh*hh)); |
| 996 | |
| 997 | for (row = 0; row < rpng2_info.height; ++row) { |
| 998 | y = row - hh; |
| 999 | dest = bg_data + row*bg_rowbytes; |
| 1000 | for (i = 0; i < rpng2_info.width; ++i) { |
| 1001 | x = i - hw; |
| 1002 | angle = (x == 0)? PI_2 : atan((double)y / (double)x); |
| 1003 | gray = (double)MAX(ABS(y), ABS(x)) / grayspot; |
| 1004 | gray = MIN(1.0, gray); |
| 1005 | dist = (double)((x*x) + (y*y)) / maxDist; |
| 1006 | intensity = cos((angle+(rotate*dist*PI)) * freq) * |
| 1007 | gray * saturate; |
| 1008 | intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; |
| 1009 | hue = (angle + PI) * INV_PI_360 + aoffset; |
| 1010 | s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); |
| 1011 | s = MIN(MAX(s,0.0), 1.0); |
| 1012 | v = MIN(MAX(intensity,0.0), 1.0); |
| 1013 | |
| 1014 | if (s == 0.0) { |
| 1015 | ch = (uch)(v * 255.0); |
| 1016 | *dest++ = ch; |
| 1017 | *dest++ = ch; |
| 1018 | *dest++ = ch; |
| 1019 | } else { |
| 1020 | if ((hue < 0.0) || (hue >= 360.0)) |
| 1021 | hue -= (((int)(hue / 360.0)) * 360.0); |
| 1022 | hue /= 60.0; |
| 1023 | ii = (int)hue; |
| 1024 | f = hue - (double)ii; |
| 1025 | p = (1.0 - s) * v; |
| 1026 | q = (1.0 - (s * f)) * v; |
| 1027 | t = (1.0 - (s * (1.0 - f))) * v; |
| 1028 | if (ii == 0) { red = v; green = t; blue = p; } |
| 1029 | else if (ii == 1) { red = q; green = v; blue = p; } |
| 1030 | else if (ii == 2) { red = p; green = v; blue = t; } |
| 1031 | else if (ii == 3) { red = p; green = q; blue = v; } |
| 1032 | else if (ii == 4) { red = t; green = p; blue = v; } |
| 1033 | else if (ii == 5) { red = v; green = p; blue = q; } |
| 1034 | *dest++ = (uch)(red * 255.0); |
| 1035 | *dest++ = (uch)(green * 255.0); |
| 1036 | *dest++ = (uch)(blue * 255.0); |
| 1037 | } |
| 1038 | } |
| 1039 | } |
| 1040 | fprintf(stderr, "done.\n"); |
| 1041 | fflush(stderr); |
| 1042 | } |
| 1043 | |
| 1044 | /*--------------------------------------------------------------------------- |
| 1045 | Blast background image to display buffer before beginning PNG decode; |
| 1046 | calling function will handle invalidation and UpdateWindow() call. |
| 1047 | ---------------------------------------------------------------------------*/ |
| 1048 | |
| 1049 | for (row = 0; row < rpng2_info.height; ++row) { |
| 1050 | src = bg_data + row*bg_rowbytes; |
| 1051 | dest = wimage_data + row*wimage_rowbytes; |
| 1052 | for (i = rpng2_info.width; i > 0; --i) { |
| 1053 | r1 = *src++; |
| 1054 | g1 = *src++; |
| 1055 | b1 = *src++; |
| 1056 | *dest++ = b1; |
| 1057 | *dest++ = g1; /* note reverse order */ |
| 1058 | *dest++ = r1; |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | return 0; |
| 1063 | |
| 1064 | } /* end function rpng2_win_load_bg_image() */ |
| 1065 | |
| 1066 | |
| 1067 | |
| 1068 | |
| 1069 | |
| 1070 | static void rpng2_win_display_row(ulg row) |
| 1071 | { |
| 1072 | uch bg_red = rpng2_info.bg_red; |
| 1073 | uch bg_green = rpng2_info.bg_green; |
| 1074 | uch bg_blue = rpng2_info.bg_blue; |
| 1075 | uch *src, *src2=NULL, *dest; |
| 1076 | uch r, g, b, a; |
| 1077 | ulg i; |
| 1078 | static int rows=0; |
| 1079 | static ulg firstrow; |
| 1080 | |
| 1081 | /*--------------------------------------------------------------------------- |
| 1082 | rows and firstrow simply track how many rows (and which ones) have not |
| 1083 | yet been displayed; alternatively, we could call InvalidateRect() for |
| 1084 | every row and not bother with the records-keeping. |
| 1085 | ---------------------------------------------------------------------------*/ |
| 1086 | |
| 1087 | Trace((stderr, "beginning rpng2_win_display_row()\n")) |
| 1088 | |
| 1089 | if (rows == 0) |
| 1090 | firstrow = row; /* first row not yet displayed */ |
| 1091 | |
| 1092 | ++rows; /* count of rows received but not yet displayed */ |
| 1093 | |
| 1094 | /*--------------------------------------------------------------------------- |
| 1095 | Aside from the use of the rpng2_info struct and the lack of an outer |
| 1096 | loop (over rows), this routine is identical to rpng_win_display_image() |
| 1097 | in the non-progressive version of the program. |
| 1098 | ---------------------------------------------------------------------------*/ |
| 1099 | |
| 1100 | src = rpng2_info.image_data + row*rpng2_info.rowbytes; |
| 1101 | if (bg_image) |
| 1102 | src2 = bg_data + row*bg_rowbytes; |
| 1103 | dest = wimage_data + row*wimage_rowbytes; |
| 1104 | |
| 1105 | if (rpng2_info.channels == 3) { |
| 1106 | for (i = rpng2_info.width; i > 0; --i) { |
| 1107 | r = *src++; |
| 1108 | g = *src++; |
| 1109 | b = *src++; |
| 1110 | *dest++ = b; |
| 1111 | *dest++ = g; /* note reverse order */ |
| 1112 | *dest++ = r; |
| 1113 | } |
| 1114 | } else /* if (rpng2_info.channels == 4) */ { |
| 1115 | for (i = rpng2_info.width; i > 0; --i) { |
| 1116 | r = *src++; |
| 1117 | g = *src++; |
| 1118 | b = *src++; |
| 1119 | a = *src++; |
| 1120 | if (bg_image) { |
| 1121 | bg_red = *src2++; |
| 1122 | bg_green = *src2++; |
| 1123 | bg_blue = *src2++; |
| 1124 | } |
| 1125 | if (a == 255) { |
| 1126 | *dest++ = b; |
| 1127 | *dest++ = g; |
| 1128 | *dest++ = r; |
| 1129 | } else if (a == 0) { |
| 1130 | *dest++ = bg_blue; |
| 1131 | *dest++ = bg_green; |
| 1132 | *dest++ = bg_red; |
| 1133 | } else { |
| 1134 | /* this macro (copied from png.h) composites the |
| 1135 | * foreground and background values and puts the |
| 1136 | * result into the first argument; there are no |
| 1137 | * side effects with the first argument */ |
| 1138 | alpha_composite(*dest++, b, a, bg_blue); |
| 1139 | alpha_composite(*dest++, g, a, bg_green); |
| 1140 | alpha_composite(*dest++, r, a, bg_red); |
| 1141 | } |
| 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | /*--------------------------------------------------------------------------- |
| 1146 | Display after every 16 rows or when on last row. (Region may include |
| 1147 | previously displayed lines due to interlacing--i.e., not contiguous.) |
| 1148 | ---------------------------------------------------------------------------*/ |
| 1149 | |
| 1150 | if ((rows & 0xf) == 0 || row == rpng2_info.height-1) { |
| 1151 | RECT rect; |
| 1152 | |
| 1153 | rect.left = 0L; |
| 1154 | rect.top = (LONG)firstrow; |
| 1155 | rect.right = (LONG)rpng2_info.width; /* possibly off by one? */ |
| 1156 | rect.bottom = (LONG)row + 1L; /* possibly off by one? */ |
| 1157 | InvalidateRect(global_hwnd, &rect, FALSE); |
| 1158 | UpdateWindow(global_hwnd); /* similar to XFlush() */ |
| 1159 | rows = 0; |
| 1160 | } |
| 1161 | |
| 1162 | } /* end function rpng2_win_display_row() */ |
| 1163 | |
| 1164 | |
| 1165 | |
| 1166 | |
| 1167 | |
| 1168 | static void rpng2_win_finish_display() |
| 1169 | { |
| 1170 | Trace((stderr, "beginning rpng2_win_finish_display()\n")) |
| 1171 | |
| 1172 | /* last row has already been displayed by rpng2_win_display_row(), so |
| 1173 | * we have nothing to do here except set a flag and let the user know |
| 1174 | * that the image is done */ |
| 1175 | |
| 1176 | rpng2_info.state = kDone; |
| 1177 | printf( |
Chris Craik | ca2bf81 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1178 | #ifndef __CYGWIN__ |
| 1179 | "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n" |
| 1180 | #else |
| 1181 | "Done. Press mouse button 1 (within image window) to quit.\n" |
| 1182 | #endif |
| 1183 | ); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1184 | fflush(stdout); |
| 1185 | } |
| 1186 | |
| 1187 | |
| 1188 | |
| 1189 | |
| 1190 | |
| 1191 | static void rpng2_win_cleanup() |
| 1192 | { |
| 1193 | if (bg_image && bg_data) { |
| 1194 | free(bg_data); |
| 1195 | bg_data = NULL; |
| 1196 | } |
| 1197 | |
| 1198 | if (rpng2_info.image_data) { |
| 1199 | free(rpng2_info.image_data); |
| 1200 | rpng2_info.image_data = NULL; |
| 1201 | } |
| 1202 | |
| 1203 | if (rpng2_info.row_pointers) { |
| 1204 | free(rpng2_info.row_pointers); |
| 1205 | rpng2_info.row_pointers = NULL; |
| 1206 | } |
| 1207 | |
| 1208 | if (dib) { |
| 1209 | free(dib); |
| 1210 | dib = NULL; |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | |
| 1215 | |
| 1216 | |
| 1217 | |
| 1218 | LRESULT CALLBACK rpng2_win_wndproc(HWND hwnd, UINT iMsg, WPARAM wP, LPARAM lP) |
| 1219 | { |
| 1220 | HDC hdc; |
| 1221 | PAINTSTRUCT ps; |
| 1222 | int rc; |
| 1223 | |
| 1224 | switch (iMsg) { |
| 1225 | case WM_CREATE: |
| 1226 | /* one-time processing here, if any */ |
| 1227 | return 0; |
| 1228 | |
| 1229 | case WM_PAINT: |
| 1230 | hdc = BeginPaint(hwnd, &ps); |
| 1231 | rc = StretchDIBits(hdc, 0, 0, rpng2_info.width, rpng2_info.height, |
| 1232 | 0, 0, rpng2_info.width, rpng2_info.height, |
| 1233 | wimage_data, (BITMAPINFO *)bmih, |
| 1234 | 0, SRCCOPY); |
| 1235 | EndPaint(hwnd, &ps); |
| 1236 | return 0; |
| 1237 | |
| 1238 | /* wait for the user to tell us when to quit */ |
| 1239 | case WM_CHAR: |
| 1240 | switch (wP) { /* only need one, so ignore repeat count */ |
| 1241 | case 'q': |
| 1242 | case 'Q': |
| 1243 | case 0x1B: /* Esc key */ |
| 1244 | PostQuitMessage(0); |
| 1245 | } |
| 1246 | return 0; |
| 1247 | |
| 1248 | case WM_LBUTTONDOWN: /* another way of quitting */ |
| 1249 | case WM_DESTROY: |
| 1250 | PostQuitMessage(0); |
| 1251 | return 0; |
| 1252 | } |
| 1253 | |
| 1254 | return DefWindowProc(hwnd, iMsg, wP, lP); |
| 1255 | } |