draw.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 * Win32 5.1 Theme drawing
 *
 * Copyright (C) 2003 Kevin Koltzau
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"

#include <stdlib.h>
#include <stdarg.h>

#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "wingdi.h"
#include "vfwmsgs.h"
#include "uxtheme.h"
#include "tmschema.h"

#include "msstyles.h"
#include "uxthemedll.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(uxtheme);

/***********************************************************************
 * Defines and global variables
 */

extern ATOM atDialogThemeEnabled;

/***********************************************************************/

/***********************************************************************
 *      EnableThemeDialogTexture                            (UXTHEME.@)
 */
HRESULT WINAPI EnableThemeDialogTexture(HWND hwnd, DWORD dwFlags)
{
    static const WCHAR szTab[] = { 'T','a','b',0 };
    HRESULT hr;

    TRACE("(%p,0x%08x\n", hwnd, dwFlags);
    hr = SetPropW (hwnd, (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled), 
        (HANDLE)(dwFlags|0x80000000)); 
        /* 0x80000000 serves as a "flags set" flag */
    if (FAILED(hr))
          return hr;
    if (dwFlags & ETDT_USETABTEXTURE)
        return SetWindowTheme (hwnd, NULL, szTab);
    else
        return SetWindowTheme (hwnd, NULL, NULL);
    return S_OK;
 }

/***********************************************************************
 *      IsThemeDialogTextureEnabled                         (UXTHEME.@)
 */
BOOL WINAPI IsThemeDialogTextureEnabled(HWND hwnd)
{
    DWORD dwDialogTextureFlags;
    TRACE("(%p)\n", hwnd);

    dwDialogTextureFlags = (DWORD)GetPropW (hwnd, 
        (LPCWSTR)MAKEINTATOM(atDialogThemeEnabled));
    if (dwDialogTextureFlags == 0) 
        /* Means EnableThemeDialogTexture wasn't called for this dialog */
        return TRUE;

    return (dwDialogTextureFlags & ETDT_ENABLE) && !(dwDialogTextureFlags & ETDT_DISABLE);
}

/***********************************************************************
 *      DrawThemeParentBackground                           (UXTHEME.@)
 */
HRESULT WINAPI DrawThemeParentBackground(HWND hwnd, HDC hdc, RECT *prc)
{
    RECT rt;
    POINT org;
    HWND hParent;
    HRGN clip = NULL;
    int hasClip = -1;
    
    TRACE("(%p,%p,%p)\n", hwnd, hdc, prc);
    hParent = GetParent(hwnd);
    if(!hParent)
        hParent = hwnd;
    if(prc) {
        CopyRect(&rt, prc);
        MapWindowPoints(hwnd, NULL, (LPPOINT)&rt, 2);
        
        clip = CreateRectRgn(0,0,1,1);
        hasClip = GetClipRgn(hdc, clip);
        if(hasClip == -1)
            TRACE("Failed to get original clipping region\n");
        else
            IntersectClipRect(hdc, prc->left, prc->top, prc->right, prc->bottom);
    }
    else {
        GetClientRect(hParent, &rt);
        MapWindowPoints(hParent, NULL, (LPPOINT)&rt, 2);
    }

    OffsetViewportOrgEx(hdc, -rt.left, -rt.top, &org);

    SendMessageW(hParent, WM_ERASEBKGND, (WPARAM)hdc, 0);
    SendMessageW(hParent, WM_PRINTCLIENT, (WPARAM)hdc, PRF_CLIENT);

    SetViewportOrgEx(hdc, org.x, org.y, NULL);
    if(prc) {
        if(hasClip == 0)
            SelectClipRgn(hdc, NULL);
        else if(hasClip == 1)
            SelectClipRgn(hdc, clip);
        DeleteObject(clip);
    }
    return S_OK;
}


/***********************************************************************
 *      DrawThemeBackground                                 (UXTHEME.@)
 */
HRESULT WINAPI DrawThemeBackground(HTHEME hTheme, HDC hdc, int iPartId,
                                   int iStateId, const RECT *pRect,
                                   const RECT *pClipRect)
{
    DTBGOPTS opts;
    opts.dwSize = sizeof(DTBGOPTS);
    opts.dwFlags = 0;
    if(pClipRect) {
        opts.dwFlags |= DTBG_CLIPRECT;
        CopyRect(&opts.rcClip, pClipRect);
    }
    return DrawThemeBackgroundEx(hTheme, hdc, iPartId, iStateId, pRect, &opts);
}

/***********************************************************************
 *      UXTHEME_SelectImage
 *
 * Select the image to use
 */
static PTHEME_PROPERTY UXTHEME_SelectImage(HTHEME hTheme, HDC hdc, int iPartId, int iStateId, const RECT *pRect, BOOL glyph)
{
    PTHEME_PROPERTY tp;
    int imageselecttype = IST_NONE;
    int i;
    int image;
    if(glyph)
        image = TMT_GLYPHIMAGEFILE;
    else
        image = TMT_IMAGEFILE;

    if((tp=MSSTYLES_FindProperty(hTheme, iPartId, iStateId, TMT_FILENAME, image)))
        return tp;
    GetThemeEnumValue(hTheme, iPartId, iStateId, TMT_IMAGESELECTTYPE, &imageselecttype);

    if(imageselecttype == IST_DPI) {
        int reqdpi = 0;
        int screendpi = GetDeviceCaps(hdc, LOGPIXELSX);
        for(i=4; i>=0; i--) {
            reqdpi = 0;
            if(SUCCEEDED(GetThemeInt(hTheme, iPartId, iStateId, i + TMT_MINDPI1, &reqdpi))) {
                if(reqdpi != 0 && screendpi >= reqdpi) {
                    TRACE("Using %d DPI, image %d\n", reqdpi, i + TMT_IMAGEFILE1);
                    return MSSTYLES_FindProperty(hTheme, iPartId, iStateId, TMT_FILENAME, i + TMT_IMAGEFILE1);
                }
            }
        }
        /* If an image couldn't be selected, choose the first one */
        return MSSTYLES_FindProperty(hTheme, iPartId, iStateId, TMT_FILENAME, TMT_IMAGEFILE1);
    }
    else if(imageselecttype == IST_SIZE) {
        POINT size = {pRect->right-pRect->left, pRect->bottom-pRect->top};
        POINT reqsize;
        for(i=4; i>=0; i--) {
            PTHEME_PROPERTY fileProp = 
                MSSTYLES_FindProperty(hTheme, iPartId, iStateId, TMT_FILENAME, i + TMT_IMAGEFILE1);
            if (!fileProp) continue;
            if(FAILED(GetThemePosition(hTheme, iPartId, iStateId, i + TMT_MINSIZE1, &reqsize))) {
                /* fall back to size of Nth image */
                WCHAR szPath[MAX_PATH];
                int imagelayout = IL_HORIZONTAL;
                int imagecount = 1;
                int imagenum;
                BITMAP bmp;
                HBITMAP hBmp;
                BOOL hasAlpha;

                lstrcpynW(szPath, fileProp->lpValue, 
                    min(fileProp->dwValueLen+1, sizeof(szPath)/sizeof(szPath[0])));
                hBmp = MSSTYLES_LoadBitmap(hTheme, szPath, &hasAlpha);
                if(!hBmp) continue;

                GetThemeEnumValue(hTheme, iPartId, iStateId, TMT_IMAGELAYOUT, &imagelayout);
                GetThemeInt(hTheme, iPartId, iStateId, TMT_IMAGECOUNT, &imagecount);

                imagenum = max (min (imagecount, iStateId), 1) - 1;
                GetObjectW(hBmp, sizeof(bmp), &bmp);
                if(imagelayout == IL_VERTICAL) {
                    reqsize.x = bmp.bmWidth;
                    reqsize.y = bmp.bmHeight/imagecount;
                }
                else {
                    reqsize.x = bmp.bmWidth/imagecount;
                    reqsize.y = bmp.bmHeight;
                }
            }
            if(reqsize.x <= size.x && reqsize.y <= size.y) {
                TRACE("Using image size %dx%d, image %d\n", reqsize.x, reqsize.y, i + TMT_IMAGEFILE1);
                return fileProp;
            }
        }
        /* If an image couldn't be selected, choose the smallest one */
        return MSSTYLES_FindProperty(hTheme, iPartId, iStateId, TMT_FILENAME, TMT_IMAGEFILE1);
    }
    return NULL;
}

/***********************************************************************
 *      UXTHEME_LoadImage
 *
 * Load image for part/state
 */
static HRESULT UXTHEME_LoadImage(HTHEME hTheme, HDC hdc, int iPartId, int iStateId, const RECT *pRect, BOOL glyph,
                          HBITMAP *hBmp, RECT *bmpRect, BOOL* hasImageAlpha)
{
    int imagelayout = IL_HORIZONTAL;
    int imagecount = 1;
    int imagenum;
    BITMAP bmp;
    WCHAR szPath[MAX_PATH];
    PTHEME_PROPERTY tp = UXTHEME_SelectImage(hTheme, hdc, iPartId, iStateId, pRect, glyph);
    if(!tp) {
        FIXME("Couldn't determine image for part/state %d/%d, invalid theme?\n", iPartId, iStateId);
        return E_PROP_ID_UNSUPPORTED;
    }
    lstrcpynW(szPath, tp->lpValue, min(tp->dwValueLen+1, sizeof(szPath)/sizeof(szPath[0])));
    *hBmp = MSSTYLES_LoadBitmap(hTheme, szPath, hasImageAlpha);
    if(!*hBmp) {
        TRACE("Failed to load bitmap %s\n", debugstr_w(szPath));
        return HRESULT_FROM_WIN32(GetLastError());
    }
    
    GetThemeEnumValue(hTheme, iPartId, iStateId, TMT_IMAGELAYOUT, &imagelayout);
    GetThemeInt(hTheme, iPartId, iStateId, TMT_IMAGECOUNT, &imagecount);

    imagenum = max (min (imagecount, iStateId), 1) - 1;
    GetObjectW(*hBmp, sizeof(bmp), &bmp);
    if(imagelayout == IL_VERTICAL) {
        int height = bmp.bmHeight/imagecount;
        bmpRect->left = 0;
        bmpRect->right = bmp.bmWidth;
        bmpRect->top = imagenum * height;
        bmpRect->bottom = bmpRect->top + height;
    }
    else {
        int width = bmp.bmWidth/imagecount;
        bmpRect->left = imagenum * width;
        bmpRect->right = bmpRect->left + width;
        bmpRect->top = 0;
        bmpRect->bottom = bmp.bmHeight;
    }
    return S_OK;
}

/***********************************************************************
 *      UXTHEME_StretchBlt
 *
 * Pseudo TransparentBlt/StretchBlt
 */
static inline BOOL UXTHEME_StretchBlt(HDC hdcDst, int nXOriginDst, int nYOriginDst, int nWidthDst, int nHeightDst,
                                      HDC hdcSrc, int nXOriginSrc, int nYOriginSrc, int nWidthSrc, int nHeightSrc,
                                      INT transparent, COLORREF transcolor)
{
    static const BLENDFUNCTION blendFunc = 
    {
      AC_SRC_OVER, /* BlendOp */
      0,           /* BlendFlag */
      255,         /* SourceConstantAlpha */
      AC_SRC_ALPHA /* AlphaFormat */
    };
    if (transparent == ALPHABLEND_BINARY) {
        /* Ensure we don't pass any negative values to TransparentBlt */
        return TransparentBlt(hdcDst, nXOriginDst, nYOriginDst, abs(nWidthDst), abs(nHeightDst),
                              hdcSrc, nXOriginSrc, nYOriginSrc, abs(nWidthSrc), abs(nHeightSrc),
                              transcolor);
    }
    if ((transparent == ALPHABLEND_NONE) ||
        !AlphaBlend(hdcDst, nXOriginDst, nYOriginDst, nWidthDst, nHeightDst,
                    hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc,
                    blendFunc))
    {
        return StretchBlt(hdcDst, nXOriginDst, nYOriginDst, nWidthDst, nHeightDst,
                          hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc,
                          SRCCOPY);
    }
    return TRUE;
}

/***********************************************************************
 *      UXTHEME_Blt
 *
 * Simplify sending same width/height for both source and dest
 */
static inline BOOL UXTHEME_Blt(HDC hdcDest, int nXOriginDest, int nYOriginDest, int nWidthDest, int nHeightDest,
                               HDC hdcSrc, int nXOriginSrc, int nYOriginSrc,
                               INT transparent, COLORREF transcolor)
{
    return UXTHEME_StretchBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest,
                              hdcSrc, nXOriginSrc, nYOriginSrc, nWidthDest, nHeightDest,
                              transparent, transcolor);
}

/***********************************************************************
 *      UXTHEME_SizedBlt
 *
 * Stretches or tiles, depending on sizingtype.
 */
static inline BOOL UXTHEME_SizedBlt (HDC hdcDst, int nXOriginDst, int nYOriginDst, 
                                     int nWidthDst, int nHeightDst,
                                     HDC hdcSrc, int nXOriginSrc, int nYOriginSrc, 
                                     int nWidthSrc, int nHeightSrc,
                                     int sizingtype, 
                                     INT transparent, COLORREF transcolor)
{
    if (sizingtype == ST_TILE)
    {
        int yOfs = nYOriginDst;
        int yRemaining = nHeightDst;
        while (yRemaining > 0)
        {
            int bltHeight = min (yRemaining, nHeightSrc);
            int xOfs = nXOriginDst;
            int xRemaining = nWidthDst;
            while (xRemaining > 0)
            {
                int bltWidth = min (xRemaining, nWidthSrc);