+++ /dev/null
-/*---------------------------------------------------------------------------
-
- rpng2 - progressive-model PNG display program rpng2-x.c
-
- This program decodes and displays PNG files progressively, as if it were
- a web browser (though the front end is only set up to read from files).
- It supports gamma correction, user-specified background colors, and user-
- specified background patterns (for transparent images). This version is
- for the X Window System (tested by the author under Unix and by Martin
- Zinser under OpenVMS; may work under OS/2 with a little tweaking).
-
- Thanks to Adam Costello and Pieter S. van der Meulen for the "diamond"
- and "radial waves" patterns, respectively.
-
- to do:
- - 8-bit support
- - finish resizable checkerboard-gradient (sizes 4-128?)
- - use %.1023s to simplify truncation of title-bar string?
-
- ---------------------------------------------------------------------------
-
- Changelog:
- - 1.01: initial public release
- - 1.02: modified to allow abbreviated options; fixed char/uchar mismatch
- - 1.10: added support for non-default visuals; fixed X pixel-conversion
- - 1.11: added -usleep option for demos; fixed command-line parsing bug
- - 1.12: added -pause option for demos and testing
- - 1.20: added runtime MMX-enabling/disabling and new -mmx* options
- - 1.21: fixed small X memory leak (thanks to Francois Petitjean)
- - 1.22: fixed XFreeGC() crash bug
-
- ---------------------------------------------------------------------------
-
- Copyright (c) 1998-2001 Greg Roelofs. All rights reserved.
-
- This software is provided "as is," without warranty of any kind,
- express or implied. In no event shall the author or contributors
- be held liable for any damages arising in any way from the use of
- this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute
- it freely, subject to the following restrictions:
-
- 1. Redistributions of source code must retain the above copyright
- notice, disclaimer, and this list of conditions.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, disclaimer, and this list of conditions in the documenta-
- tion and/or other materials provided with the distribution.
- 3. All advertising materials mentioning features or use of this
- software must display the following acknowledgment:
-
- This product includes software developed by Greg Roelofs
- and contributors for the book, "PNG: The Definitive Guide,"
- published by O'Reilly and Associates.
-
- ---------------------------------------------------------------------------*/
-
-#define PROGNAME "rpng2-x"
-#define LONGNAME "Progressive PNG Viewer for X"
-#define VERSION "1.22 of 16 August 2001"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <setjmp.h> /* for jmpbuf declaration in readpng2.h */
-#include <time.h>
-#include <math.h> /* only for PvdM background code */
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include <X11/Xos.h>
-#include <X11/keysym.h> /* defines XK_* macros */
-
-#ifdef VMS
-# include <unistd.h>
-#endif
-
-/* all for PvdM background code: */
-#ifndef PI
-# define PI 3.141592653589793238
-#endif
-#define PI_2 (PI*0.5)
-#define INV_PI_360 (360.0 / PI)
-#define MAX(a,b) (a>b?a:b)
-#define MIN(a,b) (a<b?a:b)
-#define CLIP(a,min,max) MAX(min,MIN((a),max))
-#define ABS(a) ((a)<0?-(a):(a))
-#define CLIP8P(c) MAX(0,(MIN((c),255))) /* 8-bit pos. integer (uch) */
-#define ROUNDF(f) ((int)(f + 0.5))
-
-#define rgb1_max bg_freq
-#define rgb1_min bg_gray
-#define rgb2_max bg_bsat
-#define rgb2_min bg_brot
-
-/* #define DEBUG */ /* this enables the Trace() macros */
-
-#include "readpng2.h" /* typedefs, common macros, readpng2 prototypes */
-
-
-/* could just include png.h, but this macro is the only thing we need
- * (name and typedefs changed to local versions); note that side effects
- * only happen with alpha (which could easily be avoided with
- * "ush acopy = (alpha);") */
-
-#define alpha_composite(composite, fg, alpha, bg) { \
- ush temp = ((ush)(fg)*(ush)(alpha) + \
- (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \
- (composite) = (uch)((temp + (temp >> 8)) >> 8); \
-}
-
-
-#define INBUFSIZE 4096 /* with pseudo-timing on (1 sec delay/block), this
- * block size corresponds roughly to a download
- * speed 10% faster than theoretical 33.6K maximum
- * (assuming 8 data bits, 1 stop bit and no other
- * overhead) */
-
-/* local prototypes */
-static void rpng2_x_init(void);
-static int rpng2_x_create_window(void);
-static int rpng2_x_load_bg_image(void);
-static void rpng2_x_display_row(ulg row);
-static void rpng2_x_finish_display(void);
-static void rpng2_x_cleanup(void);
-static int rpng2_x_msb(ulg u32val);
-
-
-static char titlebar[1024], *window_name = titlebar;
-static char *appname = LONGNAME;
-static char *icon_name = PROGNAME;
-static char *filename;
-static FILE *infile;
-
-static mainprog_info rpng2_info;
-
-static uch inbuf[INBUFSIZE];
-static int incount;
-
-static int pat = 6; /* must be less than num_bgpat */
-static int bg_image = 0;
-static int bgscale = 16;
-static ulg bg_rowbytes;
-static uch *bg_data;
-
-int pause_after_pass = FALSE;
-int demo_timing = FALSE;
-ulg usleep_duration = 0L;
-
-static struct rgb_color {
- uch r, g, b;
-} rgb[] = {
- { 0, 0, 0}, /* 0: black */
- {255, 255, 255}, /* 1: white */
- {173, 132, 57}, /* 2: tan */
- { 64, 132, 0}, /* 3: medium green */
- {189, 117, 1}, /* 4: gold */
- {253, 249, 1}, /* 5: yellow */
- { 0, 0, 255}, /* 6: blue */
- { 0, 0, 120}, /* 7: medium blue */
- {255, 0, 255}, /* 8: magenta */
- { 64, 0, 64}, /* 9: dark magenta */
- {255, 0, 0}, /* 10: red */
- { 64, 0, 0}, /* 11: dark red */
- {255, 127, 0}, /* 12: orange */
- {192, 96, 0}, /* 13: darker orange */
- { 24, 60, 0}, /* 14: dark green-yellow */
- { 85, 125, 200} /* 15: ice blue */
-};
-/* not used for now, but should be for error-checking:
-static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color);
- */
-
-/*
- This whole struct is a fairly cheesy way to keep the number of
- command-line options to a minimum. The radial-waves background
- type is a particularly poor fit to the integer elements of the
- struct...but a few macros and a little fixed-point math will do
- wonders for ya.
-
- type bits:
- F E D C B A 9 8 7 6 5 4 3 2 1 0
- | | | | |
- | | +-+-+-- 0 = sharp-edged checkerboard
- | | 1 = soft diamonds
- | | 2 = radial waves
- | | 3-7 = undefined
- | +-- gradient #2 inverted?
- +-- alternating columns inverted?
- */
-static struct background_pattern {
- ush type;
- int rgb1_max, rgb1_min; /* or bg_freq, bg_gray */
- int rgb2_max, rgb2_min; /* or bg_bsat, bg_brot (both scaled by 10)*/
-} bg[] = {
- {0+8, 2,0, 1,15}, /* checkered: tan/black vs. white/ice blue */
- {0+24, 2,0, 1,0}, /* checkered: tan/black vs. white/black */
- {0+8, 4,5, 0,2}, /* checkered: gold/yellow vs. black/tan */
- {0+8, 4,5, 0,6}, /* checkered: gold/yellow vs. black/blue */
- {0, 7,0, 8,9}, /* checkered: deep blue/black vs. magenta */
- {0+8, 13,0, 5,14}, /* checkered: orange/black vs. yellow */
- {0+8, 12,0, 10,11}, /* checkered: orange/black vs. red */
- {1, 7,0, 8,0}, /* diamonds: deep blue/black vs. magenta */
- {1, 12,0, 11,0}, /* diamonds: orange vs. dark red */
- {1, 10,0, 7,0}, /* diamonds: red vs. medium blue */
- {1, 4,0, 5,0}, /* diamonds: gold vs. yellow */
- {1, 3,0, 0,0}, /* diamonds: medium green vs. black */
- {2, 16, 100, 20, 0}, /* radial: ~hard radial color-beams */
- {2, 18, 100, 10, 2}, /* radial: soft, curved radial color-beams */
- {2, 16, 256, 100, 250}, /* radial: very tight spiral */
- {2, 10000, 256, 11, 0} /* radial: dipole-moire' (almost fractal) */
-};
-static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern);
-
-
-/* X-specific variables */
-static char *displayname;
-static XImage *ximage;
-static Display *display;
-static int depth;
-static Visual *visual;
-static XVisualInfo *visual_list;
-static int RShift, GShift, BShift;
-static ulg RMask, GMask, BMask;
-static Window window;
-static GC gc;
-static Colormap colormap;
-
-static int have_nondefault_visual = FALSE;
-static int have_colormap = FALSE;
-static int have_window = FALSE;
-static int have_gc = FALSE;
-
-
-
-
-int main(int argc, char **argv)
-{
-#ifdef sgi
- char tmpline[80];
-#endif
- char *p, *bgstr = NULL;
- int rc, alen, flen;
- int error = 0;
- int timing = FALSE;
- int have_bg = FALSE;
- double LUT_exponent; /* just the lookup table */
- double CRT_exponent = 2.2; /* just the monitor */
- double default_display_exponent; /* whole display system */
- XEvent e;
- KeySym k;
-
-
- /* First initialize a few things, just to be sure--memset takes care of
- * default background color (black), booleans (FALSE), pointers (NULL),
- * etc. */
-
- displayname = (char *)NULL;
- filename = (char *)NULL;
- memset(&rpng2_info, 0, sizeof(mainprog_info));
-
-
- /* Set the default value for our display-system exponent, i.e., the
- * product of the CRT exponent and the exponent corresponding to
- * the frame-buffer's lookup table (LUT), if any. This is not an
- * exhaustive list of LUT values (e.g., OpenStep has a lot of weird
- * ones), but it should cover 99% of the current possibilities. */
-
-#if defined(NeXT)
- /* third-party utilities can modify the default LUT exponent */
- LUT_exponent = 1.0 / 2.2;
- /*
- if (some_next_function_that_returns_gamma(&next_gamma))
- LUT_exponent = 1.0 / next_gamma;
- */
-#elif defined(sgi)
- LUT_exponent = 1.0 / 1.7;
- /* there doesn't seem to be any documented function to
- * get the "gamma" value, so we do it the hard way */
- infile = fopen("/etc/config/system.glGammaVal", "r");
- if (infile) {
- double sgi_gamma;
-
- fgets(tmpline, 80, infile);
- fclose(infile);
- sgi_gamma = atof(tmpline);
- if (sgi_gamma > 0.0)
- LUT_exponent = 1.0 / sgi_gamma;
- }
-#elif defined(Macintosh)
- LUT_exponent = 1.8 / 2.61;
- /*
- if (some_mac_function_that_returns_gamma(&mac_gamma))
- LUT_exponent = mac_gamma / 2.61;
- */
-#else
- LUT_exponent = 1.0; /* assume no LUT: most PCs */
-#endif
-
- /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */
- default_display_exponent = LUT_exponent * CRT_exponent;
-
-
- /* If the user has set the SCREEN_GAMMA environment variable as suggested
- * (somewhat imprecisely) in the libpng documentation, use that; otherwise
- * use the default value we just calculated. Either way, the user may
- * override this via a command-line option. */
-
- if ((p = getenv("SCREEN_GAMMA")) != NULL)
- rpng2_info.display_exponent = atof(p);
- else
- rpng2_info.display_exponent = default_display_exponent;
-
-
- /* Now parse the command line for options and the PNG filename. */
-
- while (*++argv && !error) {
- if (!strncmp(*argv, "-display", 2)) {
- if (!*++argv)
- ++error;
- else
- displayname = *argv;
- } else if (!strncmp(*argv, "-gamma", 2)) {
- if (!*++argv)
- ++error;
- else {
- rpng2_info.display_exponent = atof(*argv);
- if (rpng2_info.display_exponent <= 0.0)
- ++error;
- }
- } else if (!strncmp(*argv, "-bgcolor", 4)) {
- if (!*++argv)
- ++error;
- else {
- bgstr = *argv;
- if (strlen(bgstr) != 7 || bgstr[0] != '#')
- ++error;
- else {
- have_bg = TRUE;
- bg_image = FALSE;
- }
- }
- } else if (!strncmp(*argv, "-bgpat", 4)) {
- if (!*++argv)
- ++error;
- else {
- pat = atoi(*argv) - 1;
- if (pat < 0 || pat >= num_bgpat)
- ++error;
- else {
- bg_image = TRUE;
- have_bg = FALSE;
- }
- }
- } else if (!strncmp(*argv, "-usleep", 2)) {
- if (!*++argv)
- ++error;
- else {
- usleep_duration = (ulg)atol(*argv);
- demo_timing = TRUE;
- }
- } else if (!strncmp(*argv, "-pause", 2)) {
- pause_after_pass = TRUE;
- } else if (!strncmp(*argv, "-timing", 2)) {
- timing = TRUE;
-#if (defined(__i386__) || defined(_M_IX86))
- } else if (!strncmp(*argv, "-nommxfilters", 7)) {
- rpng2_info.nommxfilters = TRUE;
- } else if (!strncmp(*argv, "-nommxcombine", 7)) {
- rpng2_info.nommxcombine = TRUE;
- } else if (!strncmp(*argv, "-nommxinterlace", 7)) {
- rpng2_info.nommxinterlace = TRUE;
- } else if (!strcmp(*argv, "-nommx")) {
- rpng2_info.nommxfilters = TRUE;
- rpng2_info.nommxcombine = TRUE;
- rpng2_info.nommxinterlace = TRUE;
-#endif
- } else {
- if (**argv != '-') {
- filename = *argv;
- if (argv[1]) /* shouldn't be any more args after filename */
- ++error;
- } else
- ++error; /* not expecting any other options */
- }
- }
-
- if (!filename) {
- ++error;
- } else if (!(infile = fopen(filename, "rb"))) {
- fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename);
- ++error;
- } else {
- incount = fread(inbuf, 1, INBUFSIZE, infile);
- if (incount < 8 || !readpng2_check_sig(inbuf, 8)) {
- fprintf(stderr, PROGNAME
- ": [%s] is not a PNG file: incorrect signature\n",
- filename);
- ++error;
- } else if ((rc = readpng2_init(&rpng2_info)) != 0) {
- switch (rc) {
- case 2:
- fprintf(stderr, PROGNAME
- ": [%s] has bad IHDR (libpng longjmp)\n",
- filename);
- break;
- case 4:
- fprintf(stderr, PROGNAME ": insufficient memory\n");
- break;
- default:
- fprintf(stderr, PROGNAME
- ": unknown readpng2_init() error\n");
- break;
- }
- ++error;
- } else {
- display = XOpenDisplay(displayname);
- if (!display) {
- readpng2_cleanup(&rpng2_info);
- fprintf(stderr, PROGNAME ": can't open X display [%s]\n",
- displayname? displayname : "default");
- ++error;
- }
- }
- if (error)
- fclose(infile);
- }
-
-
- /* usage screen */
-
- if (error) {
- fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname);
- readpng2_version_info();
- fprintf(stderr, "\n"
- "Usage: %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
-#if (defined(__i386__) || defined(_M_IX86))
- " %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
-#endif
- " %*s [-usleep dur | -timing] [-pause] file.png\n\n"
- " xdpy\tname of the target X display (e.g., ``hostname:0'')\n"
- " exp \ttransfer-function exponent (``gamma'') of the display\n"
- "\t\t system in floating-point format (e.g., ``%.1f''); equal\n"
- "\t\t to the product of the lookup-table exponent (varies)\n"
- "\t\t and the CRT exponent (usually 2.2); must be positive\n"
- " bg \tdesired background color in 7-character hex RGB format\n"
- "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n"
- "\t\t used with transparent images; overrides -bgpat\n"
- " pat \tdesired background pattern number (1-%d); used with\n"
- "\t\t transparent images; overrides -bgcolor\n"
-#if (defined(__i386__) || defined(_M_IX86))
- " -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
- "\t\t combining rows, and expanding interlacing, respectively\n"
-#endif
- " dur \tduration in microseconds to wait after displaying each\n"
- "\t\t row (for demo purposes)\n"
- " -timing\tenables delay for every block read, to simulate modem\n"
- "\t\t download of image (~36 Kbps)\n"
- " -pause\tpauses after displaying each pass until key pressed\n"
- "\nPress Q, Esc or mouse button 1 (within image window, after image\n"
- "is displayed) to quit.\n"
- "\n", PROGNAME,
-#if (defined(__i386__) || defined(_M_IX86))
- strlen(PROGNAME), " ",
-#endif
- strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
- exit(1);
- }
-
-
- /* set the title-bar string, but make sure buffer doesn't overflow */
-
- alen = strlen(appname);
- flen = strlen(filename);
- if (alen + flen + 3 > 1023)
- sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023));
- else
- sprintf(titlebar, "%s: %s", appname, filename);
-
-
- /* set some final rpng2_info variables before entering main data loop */
-
- if (have_bg) {
- unsigned r, g, b; /* this approach quiets compiler warnings */
-
- sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b);
- rpng2_info.bg_red = (uch)r;
- rpng2_info.bg_green = (uch)g;
- rpng2_info.bg_blue = (uch)b;
- } else
- rpng2_info.need_bgcolor = TRUE;
-
- rpng2_info.done = FALSE;
- rpng2_info.mainprog_init = rpng2_x_init;
- rpng2_info.mainprog_display_row = rpng2_x_display_row;
- rpng2_info.mainprog_finish_display = rpng2_x_finish_display;
-
-
- /* OK, this is the fun part: call readpng2_decode_data() at the start of
- * the loop to deal with our first buffer of data (read in above to verify
- * that the file is a PNG image), then loop through the file and continue
- * calling the same routine to handle each chunk of data. It in turn
- * passes the data to libpng, which will invoke one or more of our call-
- * backs as decoded data become available. We optionally call sleep() for
- * one second per iteration to simulate downloading the image via an analog
- * modem. */
-
- for (;;) {
- Trace((stderr, "about to call readpng2_decode_data()\n"))
- if (readpng2_decode_data(&rpng2_info, inbuf, incount))
- ++error;
- Trace((stderr, "done with readpng2_decode_data()\n"))
- if (error || feof(infile) || rpng2_info.done)
- break;
- if (timing)
- sleep(1);
- incount = fread(inbuf, 1, INBUFSIZE, infile);
- }
-
-
- /* clean up PNG stuff and report any decoding errors */
-
- fclose(infile);
- Trace((stderr, "about to call readpng2_cleanup()\n"))
- readpng2_cleanup(&rpng2_info);
-
- if (error) {
- fprintf(stderr, PROGNAME ": libpng error while decoding PNG image\n");
- exit(3);
- }
-
-
- /* wait for the user to tell us when to quit */
-
- do
- XNextEvent(display, &e);
- while (!(e.type == ButtonPress && e.xbutton.button == Button1) &&
- !(e.type == KeyPress && /* v--- or 1 for shifted keys */
- ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape) ));
-
-
- /* we're done: clean up all image and X resources and go away */
-
- Trace((stderr, "about to call rpng2_x_cleanup()\n"))
- rpng2_x_cleanup();
-
- return 0;
-}
-
-
-
-
-
-/* this function is called by readpng2_info_callback() in readpng2.c, which
- * in turn is called by libpng after all of the pre-IDAT chunks have been
- * read and processed--i.e., we now have enough info to finish initializing */
-
-static void rpng2_x_init(void)
-{
- ulg i;
- ulg rowbytes = rpng2_info.rowbytes;
-
- Trace((stderr, "beginning rpng2_x_init()\n"))
- Trace((stderr, " rowbytes = %ld\n", rpng2_info.rowbytes))
- Trace((stderr, " width = %ld\n", rpng2_info.width))
- Trace((stderr, " height = %ld\n", rpng2_info.height))
-
- rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height);
- if (!rpng2_info.image_data) {
- readpng2_cleanup(&rpng2_info);
- return;
- }
-
- rpng2_info.row_pointers = (uch **)malloc(rpng2_info.height * sizeof(uch *));
- if (!rpng2_info.row_pointers) {
- free(rpng2_info.image_data);
- rpng2_info.image_data = NULL;
- readpng2_cleanup(&rpng2_info);
- return;
- }
-
- for (i = 0; i < rpng2_info.height; ++i)
- rpng2_info.row_pointers[i] = rpng2_info.image_data + i*rowbytes;
-
-
- /* do the basic X initialization stuff, make the window, and fill it with
- * the user-specified, file-specified or default background color or
- * pattern */
-
- if (rpng2_x_create_window()) {
-
- /* GRR TEMPORARY HACK: this is fundamentally no different from cases
- * above; libpng should longjmp() back to us when png_ptr goes away.
- * If we/it segfault instead, seems like a libpng bug... */
-
- /* we're here via libpng callback, so if window fails, clean and bail */
-printf("readpng2_cleanup.\n");
- readpng2_cleanup(&rpng2_info);
- rpng2_x_cleanup();
- exit(2);
- }
-}
-
-
-
-
-
-static int rpng2_x_create_window(void)
-{
- ulg bg_red = rpng2_info.bg_red;
- ulg bg_green = rpng2_info.bg_green;
- ulg bg_blue = rpng2_info.bg_blue;
- ulg bg_pixel = 0L;
- ulg attrmask;
- int need_colormap = FALSE;
- int screen, pad;
- uch *xdata;
- Window root;
- XEvent e;
- XGCValues gcvalues;
- XSetWindowAttributes attr;
- XSizeHints *size_hints;
- XTextProperty windowName, *pWindowName = &windowName;
- XTextProperty iconName, *pIconName = &iconName;
- XVisualInfo visual_info;
- XWMHints *wm_hints;
-
-
- Trace((stderr, "beginning rpng2_x_create_window()\n"))
-
- screen = DefaultScreen(display);
- depth = DisplayPlanes(display, screen);
- root = RootWindow(display, screen);
-
-#ifdef DEBUG
- XSynchronize(display, True);
-#endif
-
- if (depth != 16 && depth != 24 && depth != 32) {
- int visuals_matched = 0;
-
- Trace((stderr, "default depth is %d: checking other visuals\n",
- depth))
-
- /* 24-bit first */
- visual_info.screen = screen;
- visual_info.depth = 24;
- visual_list = XGetVisualInfo(display,
- VisualScreenMask | VisualDepthMask, &visual_info, &visuals_matched);
- if (visuals_matched == 0) {
-/* GRR: add 15-, 16- and 32-bit TrueColor visuals (also DirectColor?) */
- fprintf(stderr, "default screen depth %d not supported, and no"
- " 24-bit visuals found\n", depth);
- return 2;
- }
- Trace((stderr, "XGetVisualInfo() returned %d 24-bit visuals\n",
- visuals_matched))
- visual = visual_list[0].visual;
- depth = visual_list[0].depth;
-/*
- colormap_size = visual_list[0].colormap_size;
- visual_class = visual->class;
- visualID = XVisualIDFromVisual(visual);
- */
- have_nondefault_visual = TRUE;
- need_colormap = TRUE;
- } else {
- XMatchVisualInfo(display, screen, depth, TrueColor, &visual_info);
- visual = visual_info.visual;
- }
-
- RMask = visual->red_mask;
- GMask = visual->green_mask;
- BMask = visual->blue_mask;
-
-/* GRR: add/check 8-bit support */
- if (depth == 8 || need_colormap) {
- colormap = XCreateColormap(display, root, visual, AllocNone);
- if (!colormap) {
- fprintf(stderr, "XCreateColormap() failed\n");
- return 2;
- }
- have_colormap = TRUE;
- if (depth == 8)
- bg_image = FALSE; /* gradient just wastes palette entries */
- }
- if (depth == 15 || depth == 16) {
- RShift = 15 - rpng2_x_msb(RMask); /* these are right-shifts */
- GShift = 15 - rpng2_x_msb(GMask);
- BShift = 15 - rpng2_x_msb(BMask);
- } else if (depth > 16) {
- RShift = rpng2_x_msb(RMask) - 7; /* these are left-shifts */
- GShift = rpng2_x_msb(GMask) - 7;
- BShift = rpng2_x_msb(BMask) - 7;
- }
- if (depth >= 15 && (RShift < 0 || GShift < 0 || BShift < 0)) {
- fprintf(stderr, "rpng2 internal logic error: negative X shift(s)!\n");
- return 2;
- }
-
-/*---------------------------------------------------------------------------
- Finally, create the window.
- ---------------------------------------------------------------------------*/
-
- attr.backing_store = Always;
- attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask;
- attrmask = CWBackingStore | CWEventMask;
- if (have_nondefault_visual) {
- attr.colormap = colormap;
- attr.background_pixel = 0;
- attr.border_pixel = 1;
- attrmask |= CWColormap | CWBackPixel | CWBorderPixel;
- }
-
- window = XCreateWindow(display, root, 0, 0, rpng2_info.width,
- rpng2_info.height, 0, depth, InputOutput, visual, attrmask, &attr);
-
- if (window == None) {
- fprintf(stderr, "XCreateWindow() failed\n");
- return 2;
- } else
- have_window = TRUE;
-
- if (depth == 8)
- XSetWindowColormap(display, window, colormap);
-
- if (!XStringListToTextProperty(&window_name, 1, pWindowName))
- pWindowName = NULL;
- if (!XStringListToTextProperty(&icon_name, 1, pIconName))
- pIconName = NULL;
-
- /* OK if either hints allocation fails; XSetWMProperties() allows NULLs */
-
- if ((size_hints = XAllocSizeHints()) != NULL) {
- /* window will not be resizable */
- size_hints->flags = PMinSize | PMaxSize;
- size_hints->min_width = size_hints->max_width = (int)rpng2_info.width;
- size_hints->min_height = size_hints->max_height =
- (int)rpng2_info.height;
- }
-
- if ((wm_hints = XAllocWMHints()) != NULL) {
- wm_hints->initial_state = NormalState;
- wm_hints->input = True;
- /* wm_hints->icon_pixmap = icon_pixmap; */
- wm_hints->flags = StateHint | InputHint /* | IconPixmapHint */ ;
- }
-
- XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0,
- size_hints, wm_hints, NULL);
-
- /* various properties and hints no longer needed; free memory */
- if (pWindowName)
- XFree(pWindowName->value);
- if (pIconName)
- XFree(pIconName->value);
- if (size_hints)
- XFree(size_hints);
- if (wm_hints)
- XFree(wm_hints);
-
- XMapWindow(display, window);
-
- gc = XCreateGC(display, window, 0, &gcvalues);
- have_gc = TRUE;
-
-/*---------------------------------------------------------------------------
- Allocate memory for the X- and display-specific version of the image.
- ---------------------------------------------------------------------------*/
-
- if (depth == 24 || depth == 32) {
- xdata = (uch *)malloc(4*rpng2_info.width*rpng2_info.height);
- pad = 32;
- } else if (depth == 16) {
- xdata = (uch *)malloc(2*rpng2_info.width*rpng2_info.height);
- pad = 16;
- } else /* depth == 8 */ {
- xdata = (uch *)malloc(rpng2_info.width*rpng2_info.height);
- pad = 8;
- }
-
- if (!xdata) {
- fprintf(stderr, PROGNAME ": unable to allocate image memory\n");
- return 4;
- }
-
- ximage = XCreateImage(display, visual, depth, ZPixmap, 0,
- (char *)xdata, rpng2_info.width, rpng2_info.height, pad, 0);
-
- if (!ximage) {
- fprintf(stderr, PROGNAME ": XCreateImage() failed\n");
- free(xdata);
- return 3;
- }
-
- /* to avoid testing the byte order every pixel (or doubling the size of
- * the drawing routine with a giant if-test), we arbitrarily set the byte
- * order to MSBFirst and let Xlib worry about inverting things on little-
- * endian machines (e.g., Linux/x86, old VAXen, etc.)--this is not the
- * most efficient approach (the giant if-test would be better), but in
- * the interest of clarity, we'll take the easy way out... */
-
- ximage->byte_order = MSBFirst;
-
-/*---------------------------------------------------------------------------
- Fill window with the specified background color (default is black) or
- faked "background image" (but latter is disabled if 8-bit; gradients
- just waste palette entries).
- ---------------------------------------------------------------------------*/
-
- if (bg_image)
- rpng2_x_load_bg_image(); /* resets bg_image if fails */
-
- if (!bg_image) {
- if (depth == 24 || depth == 32) {
- bg_pixel = (bg_red << RShift) |
- (bg_green << GShift) |
- (bg_blue << BShift);
- } else if (depth == 16) {
- bg_pixel = (((bg_red << 8) >> RShift) & RMask) |
- (((bg_green << 8) >> GShift) & GMask) |
- (((bg_blue << 8) >> BShift) & BMask);
- } else /* depth == 8 */ {
-
- /* GRR: add 8-bit support */
-
- }
- XSetForeground(display, gc, bg_pixel);
- XFillRectangle(display, window, gc, 0, 0, rpng2_info.width,
- rpng2_info.height);
- }
-
-/*---------------------------------------------------------------------------
- Wait for first Expose event to do any drawing, then flush and return.
- ---------------------------------------------------------------------------*/
-
- do
- XNextEvent(display, &e);
- while (e.type != Expose || e.xexpose.count);
-
- XFlush(display);
-
- return 0;
-
-} /* end function rpng2_x_create_window() */
-
-
-
-
-
-static int rpng2_x_load_bg_image(void)
-{
- uch *src;
- char *dest;
- uch r1, r2, g1, g2, b1, b2;
- uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv;
- int k, hmax, max;
- int xidx, yidx, yidx_max = (bgscale-1);
- int even_odd_vert, even_odd_horiz, even_odd;
- int invert_gradient2 = (bg[pat].type & 0x08);
- int invert_column;
- int ximage_rowbytes = ximage->bytes_per_line;
- ulg i, row;
- ulg pixel;
-
-/*---------------------------------------------------------------------------
- Allocate buffer for fake background image to be used with transparent
- images; if this fails, revert to plain background color.
- ---------------------------------------------------------------------------*/
-
- bg_rowbytes = 3 * rpng2_info.width;
- bg_data = (uch *)malloc(bg_rowbytes * rpng2_info.height);
- if (!bg_data) {
- fprintf(stderr, PROGNAME
- ": unable to allocate memory for background image\n");
- bg_image = 0;
- return 1;
- }
-
-/*---------------------------------------------------------------------------
- Vertical gradients (ramps) in NxN squares, alternating direction and
- colors (N == bgscale).
- ---------------------------------------------------------------------------*/
-
- if ((bg[pat].type & 0x07) == 0) {
- uch r1_min = rgb[bg[pat].rgb1_min].r;
- uch g1_min = rgb[bg[pat].rgb1_min].g;
- uch b1_min = rgb[bg[pat].rgb1_min].b;
- uch r2_min = rgb[bg[pat].rgb2_min].r;
- uch g2_min = rgb[bg[pat].rgb2_min].g;
- uch b2_min = rgb[bg[pat].rgb2_min].b;
- int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min;
- int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min;
- int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min;
- int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min;
- int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min;
- int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min;
-
- for (row = 0; row < rpng2_info.height; ++row) {
- yidx = (int)(row % bgscale);
- even_odd_vert = (int)((row / bgscale) & 1);
-
- r1 = r1_min + (r1_diff * yidx) / yidx_max;
- g1 = g1_min + (g1_diff * yidx) / yidx_max;
- b1 = b1_min + (b1_diff * yidx) / yidx_max;
- r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max;
- g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max;
- b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max;
-
- r2 = r2_min + (r2_diff * yidx) / yidx_max;
- g2 = g2_min + (g2_diff * yidx) / yidx_max;
- b2 = b2_min + (b2_diff * yidx) / yidx_max;
- r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max;
- g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max;
- b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max;
-
- dest = (char *)bg_data + row*bg_rowbytes;
- for (i = 0; i < rpng2_info.width; ++i) {
- even_odd_horiz = (int)((i / bgscale) & 1);
- even_odd = even_odd_vert ^ even_odd_horiz;
- invert_column =
- (even_odd_horiz && (bg[pat].type & 0x10));
- if (even_odd == 0) { /* gradient #1 */
- if (invert_column) {
- *dest++ = r1_inv;
- *dest++ = g1_inv;
- *dest++ = b1_inv;
- } else {
- *dest++ = r1;
- *dest++ = g1;
- *dest++ = b1;
- }
- } else { /* gradient #2 */
- if ((invert_column && invert_gradient2) ||
- (!invert_column && !invert_gradient2))
- {
- *dest++ = r2; /* not inverted or */
- *dest++ = g2; /* doubly inverted */
- *dest++ = b2;
- } else {
- *dest++ = r2_inv;
- *dest++ = g2_inv; /* singly inverted */
- *dest++ = b2_inv;
- }
- }
- }
- }
-
-/*---------------------------------------------------------------------------
- Soft gradient-diamonds with scale = bgscale. Code contributed by Adam
- M. Costello.
- ---------------------------------------------------------------------------*/
-
- } else if ((bg[pat].type & 0x07) == 1) {
-
- hmax = (bgscale-1)/2; /* half the max weight of a color */
- max = 2*hmax; /* the max weight of a color */
-
- r1 = rgb[bg[pat].rgb1_max].r;
- g1 = rgb[bg[pat].rgb1_max].g;
- b1 = rgb[bg[pat].rgb1_max].b;
- r2 = rgb[bg[pat].rgb2_max].r;
- g2 = rgb[bg[pat].rgb2_max].g;
- b2 = rgb[bg[pat].rgb2_max].b;
-
- for (row = 0; row < rpng2_info.height; ++row) {
- yidx = (int)(row % bgscale);
- if (yidx > hmax)
- yidx = bgscale-1 - yidx;
- dest = (char *)bg_data + row*bg_rowbytes;
- for (i = 0; i < rpng2_info.width; ++i) {
- xidx = (int)(i % bgscale);
- if (xidx > hmax)
- xidx = bgscale-1 - xidx;
- k = xidx + yidx;
- *dest++ = (k*r1 + (max-k)*r2) / max;
- *dest++ = (k*g1 + (max-k)*g2) / max;
- *dest++ = (k*b1 + (max-k)*b2) / max;
- }
- }
-
-/*---------------------------------------------------------------------------
- Radial "starburst" with azimuthal sinusoids; [eventually number of sinu-
- soids will equal bgscale?]. This one is slow but very cool. Code con-
- tributed by Pieter S. van der Meulen (originally in Smalltalk).
- ---------------------------------------------------------------------------*/
-
- } else if ((bg[pat].type & 0x07) == 2) {
- uch ch;
- int ii, x, y, hw, hh, grayspot;
- double freq, rotate, saturate, gray, intensity;
- double angle=0.0, aoffset=0.0, maxDist, dist;
- double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t;
-
- fprintf(stderr, "%s: computing radial background...",
- PROGNAME);
- fflush(stderr);
-
- hh = (int)(rpng2_info.height / 2);
- hw = (int)(rpng2_info.width / 2);
-
- /* variables for radial waves:
- * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED]
- * freq: number of color beams originating from the center
- * grayspot: size of the graying center area (anti-alias)
- * rotate: rotation of the beams as a function of radius
- * saturate: saturation of beams' shape azimuthally
- */
- angle = CLIP(angle, 0.0, 360.0);
- grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw));
- freq = MAX((double)bg[pat].bg_freq, 0.0);
- saturate = (double)bg[pat].bg_bsat * 0.1;
- rotate = (double)bg[pat].bg_brot * 0.1;
- gray = 0.0;
- intensity = 0.0;
- maxDist = (double)((hw*hw) + (hh*hh));
-
- for (row = 0; row < rpng2_info.height; ++row) {
- y = (int)(row - hh);
- dest = (char *)bg_data + row*bg_rowbytes;
- for (i = 0; i < rpng2_info.width; ++i) {
- x = (int)(i - hw);
- angle = (x == 0)? PI_2 : atan((double)y / (double)x);
- gray = (double)MAX(ABS(y), ABS(x)) / grayspot;
- gray = MIN(1.0, gray);
- dist = (double)((x*x) + (y*y)) / maxDist;
- intensity = cos((angle+(rotate*dist*PI)) * freq) *
- gray * saturate;
- intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5;
- hue = (angle + PI) * INV_PI_360 + aoffset;
- s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh));
- s = MIN(MAX(s,0.0), 1.0);
- v = MIN(MAX(intensity,0.0), 1.0);
-
- if (s == 0.0) {
- ch = (uch)(v * 255.0);
- *dest++ = ch;
- *dest++ = ch;
- *dest++ = ch;
- } else {
- if ((hue < 0.0) || (hue >= 360.0))
- hue -= (((int)(hue / 360.0)) * 360.0);
- hue /= 60.0;
- ii = (int)hue;
- f = hue - (double)ii;
- p = (1.0 - s) * v;
- q = (1.0 - (s * f)) * v;
- t = (1.0 - (s * (1.0 - f))) * v;
- if (ii == 0) { red = v; green = t; blue = p; }
- else if (ii == 1) { red = q; green = v; blue = p; }
- else if (ii == 2) { red = p; green = v; blue = t; }
- else if (ii == 3) { red = p; green = q; blue = v; }
- else if (ii == 4) { red = t; green = p; blue = v; }
- else if (ii == 5) { red = v; green = p; blue = q; }
- *dest++ = (uch)(red * 255.0);
- *dest++ = (uch)(green * 255.0);
- *dest++ = (uch)(blue * 255.0);
- }
- }
- }
- fprintf(stderr, "done.\n");
- fflush(stderr);
- }
-
-/*---------------------------------------------------------------------------
- Blast background image to display buffer before beginning PNG decode.
- ---------------------------------------------------------------------------*/
-
- if (depth == 24 || depth == 32) {
- ulg red, green, blue;
-
- for (row = 0; row < rpng2_info.height; ++row) {
- src = bg_data + row*bg_rowbytes;
- dest = ximage->data + row*ximage_rowbytes;
- for (i = rpng2_info.width; i > 0; --i) {
- red = *src++;
- green = *src++;
- blue = *src++;
- pixel = (red << RShift) |
- (green << GShift) |
- (blue << BShift);
- /* recall that we set ximage->byte_order = MSBFirst above */
- /* GRR BUG: this assumes bpp == 32, but may be 24: */
- *dest++ = (char)((pixel >> 24) & 0xff);
- *dest++ = (char)((pixel >> 16) & 0xff);
- *dest++ = (char)((pixel >> 8) & 0xff);
- *dest++ = (char)( pixel & 0xff);
- }
- }
-
- } else if (depth == 16) {
- ush red, green, blue;
-
- for (row = 0; row < rpng2_info.height; ++row) {
- src = bg_data + row*bg_rowbytes;
- dest = ximage->data + row*ximage_rowbytes;
- for (i = rpng2_info.width; i > 0; --i) {
- red = ((ush)(*src) << 8); ++src;
- green = ((ush)(*src) << 8); ++src;
- blue = ((ush)(*src) << 8); ++src;
- pixel = ((red >> RShift) & RMask) |
- ((green >> GShift) & GMask) |
- ((blue >> BShift) & BMask);
- /* recall that we set ximage->byte_order = MSBFirst above */
- *dest++ = (char)((pixel >> 8) & 0xff);
- *dest++ = (char)( pixel & 0xff);
- }
- }
-
- } else /* depth == 8 */ {
-
- /* GRR: add 8-bit support */
-
- }
-
- XPutImage(display, window, gc, ximage, 0, 0, 0, 0, rpng2_info.width,
- rpng2_info.height);
-
- return 0;
-
-} /* end function rpng2_x_load_bg_image() */
-
-
-
-
-
-static void rpng2_x_display_row(ulg row)
-{
- uch bg_red = rpng2_info.bg_red;
- uch bg_green = rpng2_info.bg_green;
- uch bg_blue = rpng2_info.bg_blue;
- uch *src, *src2=NULL;
- char *dest;
- uch r, g, b, a;
- int ximage_rowbytes = ximage->bytes_per_line;
- ulg i, pixel;
- static int rows=0, prevpass=(-1);
- static ulg firstrow;
-
-/*---------------------------------------------------------------------------
- rows and firstrow simply track how many rows (and which ones) have not
- yet been displayed; alternatively, we could call XPutImage() for every
- row and not bother with the records-keeping.
- ---------------------------------------------------------------------------*/
-
- Trace((stderr, "beginning rpng2_x_display_row()\n"))
-
- if (rpng2_info.pass != prevpass) {
- if (pause_after_pass && rpng2_info.pass > 0) {
- XEvent e;
- KeySym k;
-
- fprintf(stderr,
- "%s: end of pass %d of 7; click in image window to continue\n",
- PROGNAME, prevpass + 1);
- do
- XNextEvent(display, &e);
- while (!(e.type == ButtonPress && e.xbutton.button == Button1)
- && !(e.type == KeyPress &&
- ((k = XLookupKeysym(&e.xkey, 0)) == XK_q
- || k == XK_Escape) )) ;
- }
- fprintf(stderr, "%s: pass %d of 7\r", PROGNAME, rpng2_info.pass + 1);
- fflush(stderr);
- prevpass = rpng2_info.pass;
- }
-
- if (rows == 0)
- firstrow = row; /* first row that is not yet displayed */
-
- ++rows; /* count of rows received but not yet displayed */
-
-/*---------------------------------------------------------------------------
- Aside from the use of the rpng2_info struct, the lack of an outer loop
- (over rows) and moving the XPutImage() call outside the "if (depth)"
- tests, this routine is identical to rpng_x_display_image() in the non-
- progressive version of the program.
- ---------------------------------------------------------------------------*/
-
- if (depth == 24 || depth == 32) {
- ulg red, green, blue;
-
- src = rpng2_info.image_data + row*rpng2_info.rowbytes;
- if (bg_image)
- src2 = bg_data + row*bg_rowbytes;
- dest = ximage->data + row*ximage_rowbytes;
- if (rpng2_info.channels == 3) {
- for (i = rpng2_info.width; i > 0; --i) {
- red = *src++;
- green = *src++;
- blue = *src++;
- pixel = (red << RShift) |
- (green << GShift) |
- (blue << BShift);
- /* recall that we set ximage->byte_order = MSBFirst above */
- /* GRR BUG: this assumes bpp == 32, but may be 24: */
- *dest++ = (char)((pixel >> 24) & 0xff);
- *dest++ = (char)((pixel >> 16) & 0xff);
- *dest++ = (char)((pixel >> 8) & 0xff);
- *dest++ = (char)( pixel & 0xff);
- }
- } else /* if (rpng2_info.channels == 4) */ {
- for (i = rpng2_info.width; i > 0; --i) {
- r = *src++;
- g = *src++;
- b = *src++;
- a = *src++;
- if (bg_image) {
- bg_red = *src2++;
- bg_green = *src2++;
- bg_blue = *src2++;
- }
- if (a == 255) {
- red = r;
- green = g;
- blue = b;
- } else if (a == 0) {
- red = bg_red;
- green = bg_green;
- blue = bg_blue;
- } else {
- /* this macro (from png.h) composites the foreground
- * and background values and puts the result into the
- * first argument */
- alpha_composite(red, r, a, bg_red);
- alpha_composite(green, g, a, bg_green);
- alpha_composite(blue, b, a, bg_blue);
- }
- pixel = (red << RShift) |
- (green << GShift) |
- (blue << BShift);
- /* recall that we set ximage->byte_order = MSBFirst above */
- /* GRR BUG: this assumes bpp == 32, but may be 24: */
- *dest++ = (char)((pixel >> 24) & 0xff);
- *dest++ = (char)((pixel >> 16) & 0xff);
- *dest++ = (char)((pixel >> 8) & 0xff);
- *dest++ = (char)( pixel & 0xff);
- }
- }
-
- } else if (depth == 16) {
- ush red, green, blue;
-
- src = rpng2_info.row_pointers[row];
- if (bg_image)
- src2 = bg_data + row*bg_rowbytes;
- dest = ximage->data + row*ximage_rowbytes;
- if (rpng2_info.channels == 3) {
- for (i = rpng2_info.width; i > 0; --i) {
- red = ((ush)(*src) << 8);
- ++src;
- green = ((ush)(*src) << 8);
- ++src;
- blue = ((ush)(*src) << 8);
- ++src;
- pixel = ((red >> RShift) & RMask) |
- ((green >> GShift) & GMask) |
- ((blue >> BShift) & BMask);
- /* recall that we set ximage->byte_order = MSBFirst above */
- *dest++ = (char)((pixel >> 8) & 0xff);
- *dest++ = (char)( pixel & 0xff);
- }
- } else /* if (rpng2_info.channels == 4) */ {
- for (i = rpng2_info.width; i > 0; --i) {
- r = *src++;
- g = *src++;
- b = *src++;
- a = *src++;
- if (bg_image) {
- bg_red = *src2++;
- bg_green = *src2++;
- bg_blue = *src2++;
- }
- if (a == 255) {
- red = ((ush)r << 8);
- green = ((ush)g << 8);
- blue = ((ush)b << 8);
- } else if (a == 0) {
- red = ((ush)bg_red << 8);
- green = ((ush)bg_green << 8);
- blue = ((ush)bg_blue << 8);
- } else {
- /* this macro (from png.h) composites the foreground
- * and background values and puts the result back into
- * the first argument (== fg byte here: safe) */
- alpha_composite(r, r, a, bg_red);
- alpha_composite(g, g, a, bg_green);
- alpha_composite(b, b, a, bg_blue);
- red = ((ush)r << 8);
- green = ((ush)g << 8);
- blue = ((ush)b << 8);
- }
- pixel = ((red >> RShift) & RMask) |
- ((green >> GShift) & GMask) |
- ((blue >> BShift) & BMask);
- /* recall that we set ximage->byte_order = MSBFirst above */
- *dest++ = (char)((pixel >> 8) & 0xff);
- *dest++ = (char)( pixel & 0xff);
- }
- }
-
- } else /* depth == 8 */ {
-
- /* GRR: add 8-bit support */
-
- }
-
-
-/*---------------------------------------------------------------------------
- Display after every 16 rows or when on one of last two rows. (Region
- may include previously displayed lines due to interlacing--i.e., not
- contiguous. Also, second-to-last row is final one in interlaced images
- with odd number of rows.) For demos, flush (and delay) after every 16th
- row so "sparse" passes don't go twice as fast.
- ---------------------------------------------------------------------------*/
-
- if (demo_timing && (row - firstrow >= 16 || row >= rpng2_info.height-2)) {
- XPutImage(display, window, gc, ximage, 0, (int)firstrow, 0,
- (int)firstrow, rpng2_info.width, row - firstrow + 1);
- XFlush(display);
- rows = 0;
- usleep(usleep_duration);
- } else
- if (!demo_timing && ((rows & 0xf) == 0 || row >= rpng2_info.height-2)) {
- XPutImage(display, window, gc, ximage, 0, (int)firstrow, 0,
- (int)firstrow, rpng2_info.width, row - firstrow + 1);
- XFlush(display);
- rows = 0;
- }
-
-}
-
-
-
-
-
-static void rpng2_x_finish_display(void)
-{
- Trace((stderr, "beginning rpng2_x_finish_display()\n"))
-
- /* last row has already been displayed by rpng2_x_display_row(), so we
- * have nothing to do here except set a flag and let the user know that
- * the image is done */
-
- rpng2_info.done = TRUE;
- printf(
- "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n");
- fflush(stdout);
-}
-
-
-
-
-
-static void rpng2_x_cleanup(void)
-{
- if (bg_image && bg_data) {
- free(bg_data);
- bg_data = NULL;
- }
-
- if (rpng2_info.image_data) {
- free(rpng2_info.image_data);
- rpng2_info.image_data = NULL;
- }
-
- if (rpng2_info.row_pointers) {
- free(rpng2_info.row_pointers);
- rpng2_info.row_pointers = NULL;
- }
-
- if (ximage) {
- if (ximage->data) {
- free(ximage->data); /* we allocated it, so we free it */
- ximage->data = (char *)NULL; /* instead of XDestroyImage() */
- }
- XDestroyImage(ximage);
- ximage = NULL;
- }
-
- if (have_gc)
- XFreeGC(display, gc);
-
- if (have_window)
- XDestroyWindow(display, window);
-
- if (have_colormap)
- XFreeColormap(display, colormap);
-
- if (have_nondefault_visual)
- XFree(visual_list);
-}
-
-
-
-
-
-static int rpng2_x_msb(ulg u32val)
-{
- int i;
-
- for (i = 31; i >= 0; --i) {
- if (u32val & 0x80000000L)
- break;
- u32val <<= 1;
- }
- return i;
-}
projects / synfig.git / blobdiff