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/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
#include "NgCommon.h"
#include "NgImageData.h"
#include "NgImage.h"
#include "NgWinBMPFileFormat.h"
#include <dlfcn.h>
struct NG_PTRS ng;
#define FN_TABLE_ENTRY(fn) { (void**)&ng.fn, #fn }
typedef struct {
void ** fnPtr;
char * fnName;
} FN_TABLE;
static FN_TABLE x11Functions[] = { FN_TABLE_ENTRY(XCreateGC),
FN_TABLE_ENTRY(XCreateImage),
FN_TABLE_ENTRY(XCreatePixmap),
FN_TABLE_ENTRY(XDefaultColormap),
FN_TABLE_ENTRY(XDefaultDepthOfScreen),
FN_TABLE_ENTRY(XDefaultRootWindow),
FN_TABLE_ENTRY(XDefaultScreen),
FN_TABLE_ENTRY(XDefaultScreenOfDisplay),
FN_TABLE_ENTRY(XDefaultVisual),
FN_TABLE_ENTRY(XFreeGC),
FN_TABLE_ENTRY(XFreePixmap),
FN_TABLE_ENTRY(XPutImage),
FN_TABLE_ENTRY(XQueryColor),
{ NULL, NULL }
};
static FN_TABLE xtFunctions[] = { FN_TABLE_ENTRY(XtMalloc), {NULL, NULL} };
int NGImageInit() {
int i = 0;
void * fn;
#ifdef AIX
void * x11Lib = dlopen(X11_LIB, RTLD_LAZY | RTLD_MEMBER);
void * xtLib = dlopen(XT_LIB, RTLD_LAZY | RTLD_MEMBER);
#else
void * x11Lib = dlopen(X11_LIB, RTLD_LAZY);
void * xtLib = dlopen(XT_LIB, RTLD_LAZY);
#endif
/* initialize ptr struct to 0's */
memset(&ng, 0, sizeof(struct NG_PTRS));
if (x11Lib == NULL || xtLib == NULL)
return -1;
for (i = 0; x11Functions[i].fnName != NULL; i++) {
fn = dlsym(x11Lib, x11Functions[i].fnName);
if (fn != 0)
*(x11Functions[i].fnPtr) = fn;
else
return -1;
}
for (i = 0; xtFunctions[i].fnName != NULL; i++) {
fn = dlsym(xtLib, xtFunctions[i].fnName);
if (fn != 0)
*(xtFunctions[i].fnPtr) = fn;
else
return -1;
}
return 0;
}
/**
* Return the nbr of entries in the default color palette
*/
int getNbrColorsXPalette(Display *xDisplay)
{
Visual *visual = ng.XDefaultVisual (xDisplay, ng.XDefaultScreen(xDisplay));
return visual->map_entries;
}
/**
* Return the RGB codes of the default palette
* palette: buffer of size numColors * 3, holding the RGB values
*/
ng_err_t getXPalette (Display *xDisplay, int numColors, char* palette)
{
XColor color;
int i;
int index = 0;
int colormap = ng.XDefaultColormap (xDisplay, ng.XDefaultScreen(xDisplay));
for (i = 0; i < numColors; i++)
{
color.pixel = i;
ng.XQueryColor (xDisplay, colormap, &color);
palette[index++] = ((color.red >> 8) & 0xFF);
palette[index++] = ((color.green >> 8) & 0xFF);
palette[index++] = ((color.blue >> 8) & 0xFF);
}
return ERR_OK;
}
/**
* Put a device-independent image of any depth into a drawable of the same size,
*/
ng_err_t putImage(ng_bitmap_image_t *image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY,
Display *xDisplay, Visual *visual, int screenDepth,
int drawable)
{
XImage *xImagePtr;
int bufSize;
int destRedMask = 0, destGreenMask = 0, destBlueMask = 0;
BYTE1 screenDirect;
UBYTE1 *srcData = NgBitmapImageImageData(image);
UBYTE4 srcDepth = NgBitmapImageBitCount(image);
BYTE4 sbpp, dbpp;
GC tempGC;
int numColors = 0;
/* We only support image depth of 24 bits */
if (srcDepth != 24) return NgError (ERR_NG, "Error unsupported depth - only support 24 bit");
if (screenDepth <= 8)
{
numColors = getNbrColorsXPalette (xDisplay);
if (numColors == 0)
return NgError (ERR_NG, "Error pseudo-color mode detected, no colors available");
numColors = 1 << ng.XDefaultDepthOfScreen (ng.XDefaultScreenOfDisplay (xDisplay));
screenDirect = 0;
} else
{
destRedMask = visual->red_mask;
destGreenMask = visual->green_mask;
destBlueMask = visual->blue_mask;
screenDirect = 1;
}
xImagePtr = ng.XCreateImage(xDisplay, visual, screenDepth, ZPixmap, 0, 0, srcWidth, srcHeight, 32, 0);
if (xImagePtr == NULL) return NgError (ERR_NG, "Error XCreateImage failed");
bufSize = xImagePtr->bytes_per_line * srcHeight;
xImagePtr->data = (char*) ng.XtMalloc (bufSize);
sbpp = NgBitmapImageBytesPerRow(image);
dbpp = xImagePtr->bytes_per_line;
if (screenDirect)
{
/* 24 bit source to direct screen destination */
NgBitmapImageBlitDirectToDirect(srcData, sbpp, srcWidth, srcHeight,
(UBYTE1*)xImagePtr->data, xImagePtr->bits_per_pixel, dbpp, xImagePtr->byte_order,
destRedMask, destGreenMask, destBlueMask);
} else
{
/* 24 bit source to palette screen destination */
char *palette = (char*) NgMalloc (numColors * 3);
getXPalette (xDisplay, numColors, palette);
NgBitmapImageBlitDirectToPalette(srcData, sbpp, srcWidth, srcHeight,
(UBYTE1*)xImagePtr->data, xImagePtr->bits_per_pixel, dbpp, xImagePtr->byte_order,
(UBYTE1*)palette, numColors);
NgFree (palette);
}
tempGC = ng.XCreateGC (xDisplay, drawable, 0, NULL);
ng.XPutImage(xDisplay, drawable, tempGC, xImagePtr, 0, 0, 0, 0, srcWidth, srcHeight);
XDestroyImage (xImagePtr);
ng.XFreeGC (xDisplay, tempGC);
return ERR_OK;
}
ng_err_t init(ng_bitmap_image_t *image, Display *xDisplay, int screenDepth, int drawable, Pixmap *pixmap)
{
ng_err_t err;
int width = (int)NgBitmapImageWidth(image);
int height = (int)NgBitmapImageHeight(image);
Visual *visual = ng.XDefaultVisual(xDisplay, ng.XDefaultScreen(xDisplay));
*pixmap = ng.XCreatePixmap(xDisplay, drawable, width, height, screenDepth);
if (*pixmap == 0)
{
return NgError (ERR_NG, "Error XCreatePixmap failed");
}
err = putImage(image, 0, 0, width, height, 0, 0, xDisplay, visual, screenDepth, *pixmap);
if (err != ERR_OK)
{
ng.XFreePixmap (xDisplay, *pixmap);
return NgError (err, "Error putImage failed");
}
return ERR_OK;
}
/**
* loadBMPImage
* Create a pixmap representing the given BMP file, for the specified display and screen.
*
* display: connection to X server
* screen: the screen to create the pixmap for
* bmpPathname: absolute path and name to the bmp file
*
* returned value: the pixmap newly created if successful. 0 otherwise.
*/
Pixmap loadBMPImage (Display *display, Screen *screen, char *bmpPathname) {
Window drawable;
ng_stream_t in;
ng_bitmap_image_t image;
ng_err_t err = ERR_OK;
int screenDepth;
Pixmap pixmap;
/* this must be called before any X functions are used */
NGImageInit();
NgInit();
drawable = ng.XDefaultRootWindow (display);
screenDepth = ng.XDefaultDepthOfScreen (screen);
if (NgStreamInit (&in, bmpPathname) != ERR_OK)
{
NgError (ERR_NG, "Error can't open BMP file");
return 0;
}
NgBitmapImageInit (&image);
err = NgBmpDecoderReadImage (&in, &image);
NgStreamClose (&in);
if (err != ERR_OK)
{
NgBitmapImageFree (&image);
return 0;
}
err = init (&image, display, screenDepth, drawable, &pixmap);
NgBitmapImageFree (&image);
return err == ERR_OK ? pixmap : 0;
}
const char *getBMPErrorMessage ()
{
return NgGetLastErrorMsg ();
}
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