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/*

    This file is part of a common library for Adobe(R) Photoshop(R) plugins

    Copyright (C) 2002-6 Toby Thain, toby@telegraphics.com.au

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include <windows.h>

#include <stdlib.h>

#include "ui_compat.h"

#include "str.h"

#include "dbg.h"

/* see "DIBs and Their Use",

   http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dngdi/html/msdn_dibs2.asp */

Boolean newbitmap(BITMAPREF *ppb,int depth,UIRECT *bounds){

        //char s[0x100];

        if( (*ppb = (BITMAPREF)malloc(sizeof(**ppb))) ){

                BITMAPINFOHEADER *pbmih = &(*ppb)->bmi.bmiHeader;

                pbmih->biWidth = bounds->right - bounds->left;

                pbmih->biHeight = bounds->top - bounds->bottom; // negative: top-down!

                pbmih->biSize = sizeof(BITMAPINFOHEADER);

                pbmih->biPlanes = 1;

                pbmih->biBitCount = depth; // blue,green,red; high byte not used

                pbmih->biCompression = BI_RGB;

                pbmih->biSizeImage = 0; //(*ppb)->rowbytes * -pbmih->biHeight;

                pbmih->biXPelsPerMeter =

                pbmih->biYPelsPerMeter = 0;

                pbmih->biClrUsed =

                pbmih->biClrImportant = 0;

                (*ppb)->hbmp = CreateDIBSection(NULL/*hDC*/,&(*ppb)->bmi,DIB_RGB_COLORS,(void**)&(*ppb)->pbits,NULL,0);

                (*ppb)->rowbytes = ((depth * pbmih->biWidth + 31) >> 3) & -4;

                if( (*ppb)->hbmp ){

                        /*long i,j,*p;

                        char s[0x200];

                        sprintf(s,"newbitmap: biWidth = %d,rowbytes = %d,biHeight = %d,biSize = %d,biBitCount = %d,result = %#x",

                        pbmih->biWidth,(*ppb)->rowbytes,pbmih->biHeight,

                        pbmih->biSize,pbmih->biBitCount,(*ppb)->hbmp );

                        dbg(s);

                        // checkerboard test pattern

                        for(j = -pbmih->biHeight,p=(long*)(*ppb)->pbits;j--;p+=(*ppb)->rowbytes/4)

                        for(i=pbmih->biWidth;i--;)

                        p[i] = -( (i^j)&1 ) ;*/

                        return true;

                }else

                        dbg("CreateDIBSection FAILED");

        }

        return false;

}

void disposebitmap(BITMAPREF pb){

        if(pb){

                DeleteObject(pb->hbmp);

                free(pb);

        }

}

typedef struct _tagMONITORINFO

{

        DWORD   cbSize;

        RECT    rcMonitor;

        RECT    rcWork;

        DWORD   dwFlags;

} _MONITORINFO, *_LPMONITORINFO;

typedef struct _HMONITOR__* _HMONITOR;

typedef BOOL(__stdcall* f_GetMonitorInfoA)(_HMONITOR hMonitor, _LPMONITORINFO lpmi);

BOOL _GetMonitorInfoA(_HMONITOR hMonitor, _LPMONITORINFO lpmi) {

        // Calling dynamically, because Windows 95 does not support GetMonitorInfoA

        HMODULE hLib;

        f_GetMonitorInfoA fGetMonitorInfoA;

        BOOL res;

        hLib = LoadLibraryA("USER32.DLL");

        if (!hLib) return 0;

        fGetMonitorInfoA = (f_GetMonitorInfoA)(void*)GetProcAddress(hLib, "GetMonitorInfoA");

        if (fGetMonitorInfoA != 0) {

                res = fGetMonitorInfoA(hMonitor, lpmi);

                FreeLibrary(hLib);

                return res;

        }

        else {

                return false;

        }

}

typedef _HMONITOR(__stdcall* f_MonitorFromRect)(LPCRECT lprc, DWORD dwFlags);

_HMONITOR _MonitorFromRect(LPCRECT lprc, DWORD dwFlags) {

        // Calling dynamically, because Windows 95 does not support MonitorFromRect

        HMODULE hLib;

        f_MonitorFromRect fMonitorFromRect;

        _HMONITOR res;

        hLib = LoadLibraryA("USER32.DLL");

        if (!hLib) return 0;

        fMonitorFromRect = (f_MonitorFromRect)(void*)GetProcAddress(hLib, "MonitorFromRect");

        if (fMonitorFromRect != 0) {

                res = fMonitorFromRect(lprc, dwFlags);

                FreeLibrary(hLib);

                return res;

        }

        else {

                return NULL;

        }

}

#define _MONITOR_DEFAULTTONULL       0x00000000

#define _MONITOR_DEFAULTTOPRIMARY    0x00000001

#define _MONITOR_DEFAULTTONEAREST    0x00000002

void _doMonitorAdjustments(LPRECT rcPlugin) {

        RECT rcMonitorWork;

        _HMONITOR hMonitor;

        _MONITORINFO grMonitorInfo;

        int nXAdjust = 0, nYAdjust = 0, nPluginWidth, nPluginHeight, nMonitorWorkWidth, nMonitorWorkHeight;

        hMonitor = _MonitorFromRect(rcPlugin, _MONITOR_DEFAULTTONEAREST);

        if (hMonitor == NULL) return;

        grMonitorInfo.cbSize = sizeof(grMonitorInfo);

        if (!_GetMonitorInfoA(hMonitor, &grMonitorInfo)) return;

        rcMonitorWork = grMonitorInfo.rcWork;

        // Don't let the window exit the left/right borders of the monitor

        nPluginWidth = rcPlugin->right - rcPlugin->left;

        nMonitorWorkWidth = rcMonitorWork.right - rcMonitorWork.left;

        if (nPluginWidth > nMonitorWorkWidth) {

                // Window larger than screen width. Decrease the width!

                rcPlugin->left = rcMonitorWork.left;

                rcPlugin->right = rcMonitorWork.right;

        }

        else if (rcPlugin->left < rcMonitorWork.left) {

                nXAdjust = rcMonitorWork.left - rcPlugin->left;

        }

        else if (rcPlugin->right > rcMonitorWork.right) {

                nXAdjust = rcMonitorWork.right  - rcPlugin->right;

        }

        // Don't let the window exit the top/bottom borders of the monitor

        nPluginHeight = rcPlugin->bottom - rcPlugin->top;

        nMonitorWorkHeight = rcMonitorWork.bottom - rcMonitorWork.top;

        if (nPluginHeight > nMonitorWorkHeight) {

                // Window larger than screen height. Decrease the height!

                rcPlugin->top = rcMonitorWork.top;

                rcPlugin->bottom = rcMonitorWork.bottom;

        }

        else if (rcPlugin->top < rcMonitorWork.top) {

                nYAdjust = rcMonitorWork.top - rcPlugin->top;

        }

        else if (rcPlugin->bottom > rcMonitorWork.bottom) {

                nYAdjust = rcMonitorWork.bottom - rcPlugin->bottom;

        }

        OffsetRect(rcPlugin, nXAdjust, nYAdjust);

}

/*

* Centers a window to the center of its parent form but avoids

* being spread across two screens.

*/

void centre_window(HWND hwnd) {

        RECT rcParent, rcWindowOriginal, rcPlugin;

        HWND hParent;

        hParent = GetParent(hwnd);

        if (hParent == NULL) hParent = GetDesktopWindow();

        if (!GetWindowRect(hParent, &rcParent)) return;

        if (!GetWindowRect(hwnd, &rcWindowOriginal)) return;

        rcPlugin.left =

                rcParent.left

                + (rcParent.right - rcParent.left) / 2

                - (rcWindowOriginal.right - rcWindowOriginal.left) / 2;

        rcPlugin.top =

                rcParent.top

                + (rcParent.bottom - rcParent.top) / 2

                - (rcWindowOriginal.bottom - rcWindowOriginal.top) / 2;

        rcPlugin.right =

                rcPlugin.left + rcWindowOriginal.right - rcWindowOriginal.left;

        rcPlugin.bottom =

                rcPlugin.top + rcWindowOriginal.bottom - rcWindowOriginal.top;

        // Avoid that the window is spread across two screens

        _doMonitorAdjustments(&rcPlugin);

        MoveWindow(hwnd,

                rcPlugin.left,

                rcPlugin.top,

                /*width=*/rcPlugin.right - rcPlugin.left,

                /*height=*/rcPlugin.bottom - rcPlugin.top,

                TRUE);

}