ref: 9eaba52cafcac7c2f3bfc72d7be1f15893196be1
dir: /DoConfig/fltk/src/Fl_Pixmap.cxx/
//
// "$Id$"
//
// Pixmap drawing code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2015 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// Draws X pixmap data, keeping it stashed in a server pixmap so it
// redraws fast.
// See fl_draw_pixmap.cxx for code used to get the actual data into pixmap.
// Implemented without using the xpm library (which I can't use because
// it interferes with the color cube used by fl_draw_image).
#include <config.h>
#include <FL/Fl.H>
#include <FL/fl_draw.H>
#include <FL/x.H>
#include <FL/Fl_Widget.H>
#include <FL/Fl_Menu_Item.H>
#include <FL/Fl_Pixmap.H>
#include <FL/Fl_Printer.H>
#if defined(USE_X11)
# if HAVE_X11_XREGION_H
# include <X11/Xregion.h>
# else // if the X11/Xregion.h header is not available, we assume this is the layout of an X11 Region:
typedef struct {
short x1, x2, y1, y2;
} BOX;
struct _XRegion {
long size;
long numRects;
BOX *rects;
BOX extents;
};
# endif // HAVE_X11_XREGION_H
#endif // USE_X11
#include <stdio.h>
#include "flstring.h"
#include <ctype.h>
#ifdef WIN32
extern void fl_release_dc(HWND, HDC); // located in Fl_win32.cxx
#endif
extern uchar **fl_mask_bitmap; // used by fl_draw_pixmap.cxx to store mask
void fl_restore_clip(); // in fl_rect.cxx
void Fl_Pixmap::measure() {
int W, H;
// ignore empty or bad pixmap data:
if (w()<0 && data()) {
fl_measure_pixmap(data(), W, H);
w(W); h(H);
}
}
void Fl_Pixmap::draw(int XP, int YP, int WP, int HP, int cx, int cy) {
fl_graphics_driver->draw(this, XP, YP, WP, HP, cx, cy);
}
static int start(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int w, int h, int &cx, int &cy,
int &X, int &Y, int &W, int &H)
{
// ignore empty or bad pixmap data:
if (!pxm->data()) {
return 2;
}
if (WP == -1) {
WP = w;
HP = h;
}
if (!w) {
return 2;
}
// account for current clip region (faster on Irix):
fl_clip_box(XP,YP,WP,HP,X,Y,W,H);
cx += X-XP; cy += Y-YP;
// clip the box down to the size of image, quit if empty:
if (cx < 0) {W += cx; X -= cx; cx = 0;}
if (cx+W > w) W = w-cx;
if (W <= 0) return 1;
if (cy < 0) {H += cy; Y -= cy; cy = 0;}
if (cy+H > h) H = h-cy;
if (H <= 0) return 1;
return 0;
}
int Fl_Pixmap::prepare(int XP, int YP, int WP, int HP, int &cx, int &cy,
int &X, int &Y, int &W, int &H) {
if (w() < 0) measure();
int code = start(this, XP, YP, WP, HP, w(), h(), cx, cy, X, Y, W, H);
if (code) {
if (code == 2) draw_empty(XP, YP);
return 1;
}
if (!id_) {
#ifdef __APPLE__
id_ = Fl_Quartz_Graphics_Driver::create_offscreen_with_alpha(w(), h());
#else
id_ = fl_create_offscreen(w(), h());
#endif
fl_begin_offscreen((Fl_Offscreen)id_);
#ifndef __APPLE__
uchar *bitmap = 0;
fl_mask_bitmap = &bitmap;
#endif
fl_draw_pixmap(data(), 0, 0, FL_BLACK);
#ifndef __APPLE__
#if defined(WIN32)
extern UINT win_pixmap_bg_color; // computed by fl_draw_pixmap()
this->pixmap_bg_color = win_pixmap_bg_color;
#endif
fl_mask_bitmap = 0;
if (bitmap) {
mask_ = fl_create_bitmask(w(), h(), bitmap);
delete[] bitmap;
}
#endif
fl_end_offscreen();
}
return 0;
}
//------------------------------------------------------------------------------
#ifdef __APPLE__ // Apple, Mac OS X
//------------------------------------------------------------------------------
void Fl_Quartz_Graphics_Driver::draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy) {
int X, Y, W, H;
if (pxm->prepare(XP, YP, WP, HP, cx, cy, X, Y, W, H)) return;
copy_offscreen(X, Y, W, H, (Fl_Offscreen)pxm->id_, cx, cy);
}
//------------------------------------------------------------------------------
#elif defined(WIN32) // Windows GDI
//------------------------------------------------------------------------------
void Fl_GDI_Graphics_Driver::draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy) {
int X, Y, W, H;
if (pxm->prepare(XP, YP, WP, HP, cx, cy, X, Y, W, H)) return;
if (pxm->mask_) {
HDC new_gc = CreateCompatibleDC(fl_gc);
int save = SaveDC(new_gc);
SelectObject(new_gc, (void*)pxm->mask_);
BitBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, SRCAND);
SelectObject(new_gc, (void*)pxm->id_);
BitBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, SRCPAINT);
RestoreDC(new_gc,save);
DeleteDC(new_gc);
} else {
copy_offscreen(X, Y, W, H, (Fl_Offscreen)pxm->id_, cx, cy);
}
}
#if FLTK_ABI_VERSION < 10301
UINT Fl_Pixmap::pixmap_bg_color = 0;
#endif
void Fl_GDI_Printer_Graphics_Driver::draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy) {
int X, Y, W, H;
if (pxm->prepare(XP, YP, WP, HP, cx, cy, X, Y, W, H)) return;
typedef BOOL (WINAPI* fl_transp_func) (HDC,int,int,int,int,HDC,int,int,int,int,UINT);
static HMODULE hMod = NULL;
static fl_transp_func fl_TransparentBlt = NULL;
if (!hMod) {
hMod = LoadLibrary("MSIMG32.DLL");
if(hMod) fl_TransparentBlt = (fl_transp_func)GetProcAddress(hMod, "TransparentBlt");
}
if (fl_TransparentBlt) {
HDC new_gc = CreateCompatibleDC(fl_gc);
int save = SaveDC(new_gc);
SelectObject(new_gc, (void*)pxm->id_);
// print all of offscreen but its parts in background color
fl_TransparentBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, W, H, pxm->pixmap_bg_color );
RestoreDC(new_gc,save);
DeleteDC(new_gc);
}
else {
copy_offscreen(X, Y, W, H, (Fl_Offscreen)pxm->id_, cx, cy);
}
}
//------------------------------------------------------------------------------
#else // X11, Xlib
//------------------------------------------------------------------------------
void Fl_Xlib_Graphics_Driver::draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy) {
int X, Y, W, H;
if (pxm->prepare(XP, YP, WP, HP, cx, cy, X, Y, W, H)) return;
if (pxm->mask_) {
// make X use the bitmap as a mask:
XSetClipMask(fl_display, fl_gc, pxm->mask_);
XSetClipOrigin(fl_display, fl_gc, X-cx, Y-cy);
if (clip_region()) {
// At this point, XYWH is the bounding box of the intersection between
// the current clip region and the (portion of the) pixmap we have to draw.
// The current clip region is often a rectangle. But, when a window with rounded
// corners is moved above another window, expose events may create a complex clip
// region made of several (e.g., 10) rectangles. We have to draw only in the clip
// region, and also to mask out the transparent pixels of the image. This can't
// be done in a single Xlib call for a multi-rectangle clip region. Thus, we
// process each rectangle of the intersection between the clip region and XYWH.
// See also STR #3206.
Region r = XRectangleRegion(X,Y,W,H);
XIntersectRegion(r, clip_region(), r);
int X1, Y1, W1, H1;
for (int i = 0; i < r->numRects; i++) {
X1 = r->rects[i].x1;
Y1 = r->rects[i].y1;
W1 = r->rects[i].x2 - r->rects[i].x1;
H1 = r->rects[i].y2 - r->rects[i].y1;
copy_offscreen(X1, Y1, W1, H1, pxm->id_, cx + (X1 - X), cy + (Y1 - Y));
}
XDestroyRegion(r);
} else {
copy_offscreen(X, Y, W, H, pxm->id_, cx, cy);
}
// put the old clip region back
XSetClipOrigin(fl_display, fl_gc, 0, 0);
restore_clip();
}
else copy_offscreen(X, Y, W, H, pxm->id_, cx, cy);
}
//------------------------------------------------------------------------------
#endif // (platform-specific)
//------------------------------------------------------------------------------
/**
The destructor frees all memory and server resources that are used by
the pixmap.
*/
Fl_Pixmap::~Fl_Pixmap() {
uncache();
delete_data();
}
void Fl_Pixmap::uncache() {
if (id_) {
fl_delete_offscreen((Fl_Offscreen)id_);
id_ = 0;
}
if (mask_) {
fl_delete_bitmask((Fl_Bitmask)mask_);
mask_ = 0;
}
}
void Fl_Pixmap::label(Fl_Widget* widget) {
widget->image(this);
}
void Fl_Pixmap::label(Fl_Menu_Item* m) {
Fl::set_labeltype(_FL_IMAGE_LABEL, labeltype, Fl_Image::measure);
m->label(_FL_IMAGE_LABEL, (const char*)this);
}
void Fl_Pixmap::copy_data() {
if (alloc_data) return;
char **new_data, // New data array
**new_row; // Current row in image
int i, // Looping var
ncolors, // Number of colors in image
chars_per_pixel,// Characters per color
chars_per_line; // Characters per line
// Figure out how many colors there are, and how big they are...
sscanf(data()[0],"%*d%*d%d%d", &ncolors, &chars_per_pixel);
chars_per_line = chars_per_pixel * w() + 1;
// Allocate memory for the new array...
if (ncolors < 0) new_data = new char *[h() + 2];
else new_data = new char *[h() + ncolors + 1];
new_data[0] = new char[strlen(data()[0]) + 1];
strcpy(new_data[0], data()[0]);
// Copy colors...
if (ncolors < 0) {
// Copy FLTK colormap values...
ncolors = -ncolors;
new_row = new_data + 1;
*new_row = new char[ncolors * 4];
memcpy(*new_row, data()[1], ncolors * 4);
ncolors = 1;
new_row ++;
} else {
// Copy standard XPM colormap values...
for (i = 0, new_row = new_data + 1; i < ncolors; i ++, new_row ++) {
*new_row = new char[strlen(data()[i + 1]) + 1];
strcpy(*new_row, data()[i + 1]);
}
}
// Copy image data...
for (i = 0; i < h(); i ++, new_row ++) {
*new_row = new char[chars_per_line];
memcpy(*new_row, data()[i + ncolors + 1], chars_per_line);
}
// Update pointers...
data((const char **)new_data, h() + ncolors + 1);
alloc_data = 1;
}
Fl_Image *Fl_Pixmap::copy(int W, int H) {
Fl_Pixmap *new_image; // New pixmap
// Optimize the simple copy where the width and height are the same...
if (W == w() && H == h()) {
// Make an exact copy of the image and return it...
new_image = new Fl_Pixmap(data());
new_image->copy_data();
return new_image;
}
if (W <= 0 || H <= 0) return 0;
// OK, need to resize the image data; allocate memory and
char **new_data, // New array for image data
**new_row, // Pointer to row in image data
*new_ptr, // Pointer into new array
new_info[255]; // New information line
const char *old_ptr; // Pointer into old array
int i, // Looping var
c, // Channel number
sy, // Source coordinate
dx, dy, // Destination coordinates
xerr, yerr, // X & Y errors
xmod, ymod, // X & Y moduli
xstep, ystep; // X & Y step increments
int ncolors, // Number of colors in image
chars_per_pixel,// Characters per color
chars_per_line; // Characters per line
// Figure out how many colors there are, and how big they are...
sscanf(data()[0],"%*d%*d%d%d", &ncolors, &chars_per_pixel);
chars_per_line = chars_per_pixel * W + 1;
sprintf(new_info, "%d %d %d %d", W, H, ncolors, chars_per_pixel);
// Figure out Bresenham step/modulus values...
xmod = w() % W;
xstep = (w() / W) * chars_per_pixel;
ymod = h() % H;
ystep = h() / H;
// Allocate memory for the new array...
if (ncolors < 0) new_data = new char *[H + 2];
else new_data = new char *[H + ncolors + 1];
new_data[0] = new char[strlen(new_info) + 1];
strcpy(new_data[0], new_info);
// Copy colors...
if (ncolors < 0) {
// Copy FLTK colormap values...
ncolors = -ncolors;
new_row = new_data + 1;
*new_row = new char[ncolors * 4];
memcpy(*new_row, data()[1], ncolors * 4);
ncolors = 1;
new_row ++;
} else {
// Copy standard XPM colormap values...
for (i = 0, new_row = new_data + 1; i < ncolors; i ++, new_row ++) {
*new_row = new char[strlen(data()[i + 1]) + 1];
strcpy(*new_row, data()[i + 1]);
}
}
// Scale the image using a nearest-neighbor algorithm...
for (dy = H, sy = 0, yerr = H; dy > 0; dy --, new_row ++) {
*new_row = new char[chars_per_line];
new_ptr = *new_row;
for (dx = W, xerr = W, old_ptr = data()[sy + ncolors + 1];
dx > 0;
dx --) {
for (c = 0; c < chars_per_pixel; c ++) *new_ptr++ = old_ptr[c];
old_ptr += xstep;
xerr -= xmod;
if (xerr <= 0) {
xerr += W;
old_ptr += chars_per_pixel;
}
}
*new_ptr = '\0';
sy += ystep;
yerr -= ymod;
if (yerr <= 0) {
yerr += H;
sy ++;
}
}
new_image = new Fl_Pixmap((char*const*)new_data);
new_image->alloc_data = 1;
return new_image;
}
void Fl_Pixmap::color_average(Fl_Color c, float i) {
// Delete any existing pixmap/mask objects...
uncache();
// Allocate memory as needed...
copy_data();
// Get the color to blend with...
uchar r, g, b;
unsigned ia, ir, ig, ib;
Fl::get_color(c, r, g, b);
if (i < 0.0f) i = 0.0f;
else if (i > 1.0f) i = 1.0f;
ia = (unsigned)(256 * i);
ir = r * (256 - ia);
ig = g * (256 - ia);
ib = b * (256 - ia);
// Update the colormap to do the blend...
char line[255]; // New colormap line
int color, // Looping var
ncolors, // Number of colors in image
chars_per_pixel;// Characters per color
sscanf(data()[0],"%*d%*d%d%d", &ncolors, &chars_per_pixel);
if (ncolors < 0) {
// Update FLTK colormap...
ncolors = -ncolors;
uchar *cmap = (uchar *)(data()[1]);
for (color = 0; color < ncolors; color ++, cmap += 4) {
cmap[1] = (ia * cmap[1] + ir) >> 8;
cmap[2] = (ia * cmap[2] + ig) >> 8;
cmap[3] = (ia * cmap[3] + ib) >> 8;
}
} else {
// Update standard XPM colormap...
for (color = 0; color < ncolors; color ++) {
// look for "c word", or last word if none:
const char *p = data()[color + 1] + chars_per_pixel + 1;
const char *previous_word = p;
for (;;) {
while (*p && isspace(*p)) p++;
char what = *p++;
while (*p && !isspace(*p)) p++;
while (*p && isspace(*p)) p++;
if (!*p) {p = previous_word; break;}
if (what == 'c') break;
previous_word = p;
while (*p && !isspace(*p)) p++;
}
if (fl_parse_color(p, r, g, b)) {
r = (ia * r + ir) >> 8;
g = (ia * g + ig) >> 8;
b = (ia * b + ib) >> 8;
if (chars_per_pixel > 1) sprintf(line, "%c%c c #%02X%02X%02X",
data()[color + 1][0],
data()[color + 1][1], r, g, b);
else sprintf(line, "%c c #%02X%02X%02X", data()[color + 1][0], r, g, b);
delete[] (char *)data()[color + 1];
((char **)data())[color + 1] = new char[strlen(line) + 1];
strcpy((char *)data()[color + 1], line);
}
}
}
}
void Fl_Pixmap::delete_data() {
if (alloc_data) {
for (int i = 0; i < count(); i ++) delete[] (char *)data()[i];
delete[] (char **)data();
}
}
void Fl_Pixmap::set_data(const char * const * p) {
int height, // Number of lines in image
ncolors; // Number of colors in image
if (p) {
sscanf(p[0],"%*d%d%d", &height, &ncolors);
if (ncolors < 0) data(p, height + 2);
else data(p, height + ncolors + 1);
}
}
void Fl_Pixmap::desaturate() {
// Delete any existing pixmap/mask objects...
uncache();
// Allocate memory as needed...
copy_data();
// Update the colormap to grayscale...
char line[255]; // New colormap line
int i, // Looping var
ncolors, // Number of colors in image
chars_per_pixel;// Characters per color
uchar r, g, b;
sscanf(data()[0],"%*d%*d%d%d", &ncolors, &chars_per_pixel);
if (ncolors < 0) {
// Update FLTK colormap...
ncolors = -ncolors;
uchar *cmap = (uchar *)(data()[1]);
for (i = 0; i < ncolors; i ++, cmap += 4) {
g = (uchar)((cmap[1] * 31 + cmap[2] * 61 + cmap[3] * 8) / 100);
cmap[1] = cmap[2] = cmap[3] = g;
}
} else {
// Update standard XPM colormap...
for (i = 0; i < ncolors; i ++) {
// look for "c word", or last word if none:
const char *p = data()[i + 1] + chars_per_pixel + 1;
const char *previous_word = p;
for (;;) {
while (*p && isspace(*p)) p++;
char what = *p++;
while (*p && !isspace(*p)) p++;
while (*p && isspace(*p)) p++;
if (!*p) {p = previous_word; break;}
if (what == 'c') break;
previous_word = p;
while (*p && !isspace(*p)) p++;
}
if (fl_parse_color(p, r, g, b)) {
g = (uchar)((r * 31 + g * 61 + b * 8) / 100);
if (chars_per_pixel > 1) sprintf(line, "%c%c c #%02X%02X%02X", data()[i + 1][0],
data()[i + 1][1], g, g, g);
else sprintf(line, "%c c #%02X%02X%02X", data()[i + 1][0], g, g, g);
delete[] (char *)data()[i + 1];
((char **)data())[i + 1] = new char[strlen(line) + 1];
strcpy((char *)data()[i + 1], line);
}
}
}
}
//
// End of "$Id$".
//