-/////////////////////////////////////////////////////////////////////////////
-// Name: dib.cpp
-// Purpose: Routines for dealing with Device Independent Bitmaps.
-// Author:
-// Modified by: Jason Quijano 06/06/2001
-// Created: 01/02/97
+///////////////////////////////////////////////////////////////////////////////
+// Name: src/msw/dib.cpp
+// Purpose: implements wxDIB class
+// Author: Vadim Zeitlin
+// Modified by:
+// Created: 03.03.03 (replaces the old file with the same name)
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart
-/////////////////////////////////////////////////////////////////////////////
-// FUNCTIONS :
-// wxReadDIB() - Reads a DIB
-// WriteDIB() - Writes a global handle in CF_DIB format to a file.
-// wxPaletteSize() - Calculates the palette size in bytes of given DIB *
-// DibNumColors() - Determines the number of colors in DIB
-// DibFromBitmap() - Creates a DIB repr. the DDB passed in.
-// lread() - Private routine to read more than 64k
-// lwrite() - Private routine to write more than 64k
-/////////////////////////////////////////////////////////////////////////////
+// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
+// License: wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+ #include "wx/string.h"
+ #include "wx/log.h"
+#endif //WX_PRECOMP
+
+#include "wx/image.h"
+
+#include "wx/msw/dib.h"
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxDIB creation
+// ----------------------------------------------------------------------------
+
+bool wxDIB::Create(int width, int height, int depth)
+{
+ // we don't handle the palette yet
+ wxASSERT_MSG( depth == 24 || depth == 32,
+ _T("unsupported image depth in wxDIB::Create()") );
+
+ static const int infosize = sizeof(BITMAPINFOHEADER);
+
+ BITMAPINFO *info = (BITMAPINFO *)malloc(infosize);
+ wxCHECK_MSG( info, NULL, _T("malloc(BITMAPINFO) failed") );
+
+ memset(info, 0, infosize);
+
+ info->bmiHeader.biSize = infosize;
+ info->bmiHeader.biWidth = width;
+ info->bmiHeader.biHeight = -height;
+ info->bmiHeader.biPlanes = 1;
+ info->bmiHeader.biBitCount = depth;
+ info->bmiHeader.biCompression = BI_RGB;
+ info->bmiHeader.biSizeImage = GetLineSize(width, depth)*height;
+
+ // No need to report an error here. If it fails, we just won't use a
+ // file mapping and CreateDIBSection will just allocate memory for us.
+ m_handle = ::CreateDIBSection
+ (
+ 0, // hdc (unused with DIB_RGB_COLORS)
+ info, // bitmap description
+ DIB_RGB_COLORS, // use RGB, not palette
+ &m_data, // [out] DIB bits
+ NULL, // don't use file mapping
+ 0 // file mapping offset (not used here)
+ );
+
+ free(info);
+
+ if ( !m_handle )
+ {
+ wxLogLastError(wxT("CreateDIBSection"));
+
+ return false;
+ }
+
+ m_width = width;
+ m_height = height;
+ m_depth = depth;
+
+ return true;
+}
+
+// ----------------------------------------------------------------------------
+// wxDIB accessors
+// ----------------------------------------------------------------------------
+
+void wxDIB::DoGetObject() const
+{
+ // only do something if we have a valid DIB but we don't [yet] have valid
+ // data
+ if ( m_handle && !m_data )
+ {
+ // although all the info we need is in BITMAP and so we don't really
+ // need DIBSECTION we still ask for it as modifying the bit values only
+ // works for the real DIBs and not for the bitmaps and it's better to
+ // check for this now rather than trying to find out why it doesn't
+ // work later
+ DIBSECTION ds;
+ if ( !::GetObject(m_handle, sizeof(ds), &ds) )
+ {
+ wxLogLastError(_T("GetObject(hDIB)"));
+
+ return;
+ }
+
+ wxDIB *self = wxConstCast(this, wxDIB);
+
+ self->m_width = ds.dsBm.bmWidth;
+ self->m_height = ds.dsBm.bmHeight;
+ self->m_depth = ds.dsBm.bmBitsPixel;
+ self->m_data = ds.dsBm.bmBits;
+ }
+}
+
+// ----------------------------------------------------------------------------
+// wxImage support
+// ----------------------------------------------------------------------------
+
+#if wxUSE_IMAGE
+
+bool wxDIB::Create(const wxImage& image)
+{
+ wxCHECK_MSG( image.Ok(), false, _T("invalid wxImage in wxDIB ctor") );
+
+ const int h = image.GetHeight();
+ const int w = image.GetWidth();
+
+ // if we have alpha channel, we need to create a 32bpp RGBA DIB, otherwise
+ // a 24bpp RGB is sufficient
+ const bool hasAlpha = image.HasAlpha();
+ const int bpp = hasAlpha ? 32 : 24;
+
+ if ( !Create(w, h, bpp) )
+ return false;
+
+ // DIBs are stored in bottom to top order so we need to copy bits line by
+ // line and starting from the end
+ const int srcBytesPerLine = w * 3;
+ const int dstBytesPerLine = GetLineSize(w, bpp);
+ const unsigned char *src = image.GetData() + ((h - 1) * srcBytesPerLine);
+ const unsigned char *alpha = hasAlpha ? image.GetAlpha() + (h - 1)*w : NULL;
+ unsigned char *dstLineStart = (unsigned char *)m_data;
+ for ( int y = 0; y < h; y++ )
+ {
+ // copy one DIB line
+ unsigned char *dst = dstLineStart;
+ for ( int x = 0; x < w; x++ )
+ {
+ // also, the order of RGB is inversed for DIBs
+ *dst++ = src[2];
+ *dst++ = src[1];
+ *dst++ = src[0];
+
+ src += 3;
+
+ if ( alpha )
+ *dst++ = *alpha++;
+ }
+
+ // pass to the previous line in the image
+ src -= 2*srcBytesPerLine;
+ if ( alpha )
+ alpha -= 2*w;
+
+ // and to the next one in the DIB
+ dstLineStart += dstBytesPerLine;
+ }
+
+ return true;
+}
+
+#endif // wxUSE_IMAGE
+
+// ============================================================================
+// old DIB code, to be integrated in wxDIB class
+// ============================================================================
+
+/*******************************************************************************
+ * *
+ * MODULE : DIB.CC *
+ * *
+ * DESCRIPTION : Routines for dealing with Device Independent Bitmaps. *
+ * *
+ * FUNCTIONS : *
+ * *
+ * wxReadDIB() - Reads a DIB *
+ * *
+ * WriteDIB() - Writes a global handle in CF_DIB format*
+ * to a file. *
+ * *
+ * wxPaletteSize() - Calculates the palette size in bytes *
+ * of given DIB *
+ * *
+ * DibNumColors() - Determines the number of colors in DIB *
+ * *
+ * DibFromBitmap() - Creates a DIB repr. the DDB passed in. *
+ * *
+ * *
+ * lread() - Private routine to read more than 64k *
+ * *
+ * lwrite() - Private routine to write more than 64k *
+ * *
+ *******************************************************************************/
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#endif
#include "wx/msw/dib.h"
-#include "wx/filesys.h"
#ifdef __GNUWIN32_OLD__
#include "wx/msw/gnuwin32/extra.h"
#endif
#ifndef SEEK_CUR
-// flags for _lseek
+/* flags for _lseek */
#define SEEK_CUR 1
#define SEEK_END 2
#define SEEK_SET 0
#endif
-// Number of bytes to be read during each read operation.
-#define MAXREAD 32768
+#define MAXREAD 32768 /* Number of bytes to be read during */
+ /* each read operation. */
-// Header signatutes for various resources
-#define BFT_ICON 0x4349 // 'IC'
-#define BFT_BITMAP 0x4d42 // 'BM'
-#define BFT_CURSOR 0x5450 // 'PT('
+/* Header signatutes for various resources */
+#define BFT_ICON 0x4349 /* 'IC' */
+#define BFT_BITMAP 0x4d42 /* 'BM' */
+#define BFT_CURSOR 0x5450 /* 'PT(' */
-// macro to determine if resource is a DIB
-#define ISDIB(bft) ((bft) == BFT_BITMAP)
+/* macro to determine if resource is a DIB */
+#define ISDIB(bft) ((bft) == BFT_BITMAP)
-// Macro to align given value to the closest DWORD (unsigned long )
-#define ALIGNULONG(i) ((i+3)/4*4)
+/* Macro to align given value to the closest DWORD (unsigned long ) */
+#define ALIGNULONG(i) ((i+3)/4*4)
-// Macro to determine to round off the given value to the closest byte
-#define WIDTHBYTES(i) ((i+31)/32*4)
+/* Macro to determine to round off the given value to the closest byte */
+#define WIDTHBYTES(i) ((i+31)/32*4)
-#define PALVERSION 0x300
-#define MAXPALETTE 256 // max. # supported palette entries
+#define PALVERSION 0x300
+#define MAXPALETTE 256 /* max. # supported palette entries */
+static DWORD PASCAL lread(int fh, VOID FAR *pv, DWORD ul);
static DWORD PASCAL lwrite(int fh, VOID FAR *pv, DWORD ul);
-static BOOL WriteDIB (LPTSTR szFile,HANDLE hdib);
-WORD wxPaletteSize (VOID FAR * pv); // This is non-static as some apps use it externally
-static WORD DibNumColors (VOID FAR * pv);
-// HANDLE DibFromBitmap (HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal);
+static BOOL WriteDIB (LPTSTR szFile,HANDLE hdib);
+WORD wxPaletteSize (VOID FAR * pv); // This is non-static as some apps use it externally
+static WORD DibNumColors (VOID FAR * pv);
+// HANDLE DibFromBitmap (HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal);
static BOOL PASCAL MakeBitmapAndPalette(HDC,HANDLE,HPALETTE *,HBITMAP *);
-// ----------------------------------------------------------------------------
-// FUNCTION : WriteDIB(LPSTR szFile,HANDLE hdib)
-// PURPOSE : Write a global handle in CF_DIB format to a file.
-// RETURNS : TRUE - if successful. FALSE - otherwise
-// ----------------------------------------------------------------------------
-static BOOL WriteDIB(
- LPTSTR szFile,
- HANDLE hdib )
+/****************************************************************************
+ * *
+ * FUNCTION : WriteDIB(LPSTR szFile,HANDLE hdib) *
+ * *
+ * PURPOSE : Write a global handle in CF_DIB format to a file. *
+ * *
+ * RETURNS : TRUE - if successful. *
+ * FALSE - otherwise *
+ * *
+ ****************************************************************************/
+
+static BOOL WriteDIB(LPTSTR szFile, HANDLE hdib)
{
- BITMAPFILEHEADER hdr;
- LPBITMAPINFOHEADER lpbi;
- int fh;
- OFSTRUCT of;
+ BITMAPFILEHEADER hdr;
+ LPBITMAPINFOHEADER lpbi;
+ int fh;
+ OFSTRUCT of;
+
+ if (!hdib)
+ return FALSE;
- if (!hdib)
- return FALSE;
- fh = OpenFile(wxConvertWX2MB(szFile), &of, OF_CREATE | OF_READWRITE);
- if (fh == -1)
- return FALSE;
+ fh = OpenFile(wxConvertWX2MB(szFile), &of, OF_CREATE | OF_READWRITE);
+ if (fh == -1)
+ return FALSE;
#ifdef __WINDOWS_386__
- lpbi = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock(hdib));
+ lpbi = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock(hdib));
#else
- lpbi = (LPBITMAPINFOHEADER) GlobalLock(hdib);
+ lpbi = (LPBITMAPINFOHEADER) GlobalLock(hdib);
#endif
- // Fill in the fields of the file header
- hdr.bfType = BFT_BITMAP;
- hdr.bfSize = GlobalSize(hdib) + sizeof(BITMAPFILEHEADER);
- hdr.bfReserved1 = 0;
- hdr.bfReserved2 = 0;
- hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + lpbi->biSize + wxPaletteSize(lpbi);
+ /* Fill in the fields of the file header */
+ hdr.bfType = BFT_BITMAP;
+ hdr.bfSize = GlobalSize(hdib) + sizeof(BITMAPFILEHEADER);
+ hdr.bfReserved1 = 0;
+ hdr.bfReserved2 = 0;
+ hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + lpbi->biSize +
+ wxPaletteSize(lpbi);
- // Write the file header
- _lwrite(fh, (LPSTR) &hdr, sizeof(BITMAPFILEHEADER));
+ /* Write the file header */
+ _lwrite(fh, (LPSTR) &hdr, sizeof(BITMAPFILEHEADER));
- //Write the DIB header and the bits
- lwrite(fh, (LPSTR) lpbi, GlobalSize(hdib));
+ /* Write the DIB header and the bits */
+ lwrite(fh, (LPSTR) lpbi, GlobalSize(hdib));
- GlobalUnlock(hdib);
- _lclose(fh);
- return TRUE;
+ GlobalUnlock(hdib);
+ _lclose(fh);
+ return TRUE;
}
-// ----------------------------------------------------------------------------
-// FUNCTION : wxPaletteSize(VOID FAR * pv)
-// PURPOSE : Calculates the palette size in bytes. If the info. block
-// is of the BITMAPCOREHEADER type, the number of colors is
-// multiplied by 3 to give the palette size, otherwise the
-// number of colors is multiplied by 4.
-// RETURNS : Palette size in number of bytes.
-// ----------------------------------------------------------------------------
-WORD wxPaletteSize(
- VOID FAR * pv )
+/****************************************************************************
+ * *
+ * FUNCTION : wxPaletteSize(VOID FAR * pv) *
+ * *
+ * PURPOSE : Calculates the palette size in bytes. If the info. block *
+ * is of the BITMAPCOREHEADER type, the number of colors is *
+ * multiplied by 3 to give the palette size, otherwise the *
+ * number of colors is multiplied by 4. *
+ * *
+ * RETURNS : Palette size in number of bytes. *
+ * *
+ ****************************************************************************/
+
+WORD wxPaletteSize(VOID FAR * pv)
{
- LPBITMAPINFOHEADER lpbi;
- WORD NumColors;
+ LPBITMAPINFOHEADER lpbi;
+ WORD NumColors;
- lpbi = (LPBITMAPINFOHEADER) pv;
- NumColors = DibNumColors(lpbi);
+ lpbi = (LPBITMAPINFOHEADER) pv;
+ NumColors = DibNumColors(lpbi);
- if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
- return (WORD)(NumColors * sizeof(RGBTRIPLE));
- else
- return (WORD)(NumColors * sizeof(RGBQUAD));
+ if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
+ return (WORD)(NumColors * sizeof(RGBTRIPLE));
+ else
+ return (WORD)(NumColors * sizeof(RGBQUAD));
}
-// ----------------------------------------------------------------------------
-// FUNCTION : DibNumColors(VOID FAR * pv)
-// PURPOSE : Determines the number of colors in the DIB by looking at
-// the BitCount filed in the info block.
-// RETURNS : The number of colors in the DIB.
-// ----------------------------------------------------------------------------
-static WORD DibNumColors(
- VOID FAR *pv )
+/****************************************************************************
+ * *
+ * FUNCTION : DibNumColors(VOID FAR * pv) *
+ * *
+ * PURPOSE : Determines the number of colors in the DIB by looking at *
+ * the BitCount filed in the info block. *
+ * *
+ * RETURNS : The number of colors in the DIB. *
+ * *
+ ****************************************************************************/
+
+static WORD DibNumColors(VOID FAR *pv)
{
- int bits;
- BITMAPINFOHEADER *lpbi;
- BITMAPCOREHEADER *lpbc;
- lpbi = ((BITMAPINFOHEADER*) pv);
- lpbc = ((BITMAPCOREHEADER*) pv);
-
- // With the BITMAPINFO format headers, the size of the palette
- // is in biClrUsed, whereas in the BITMAPCORE - style headers, it
- // is dependent on the bits per pixel ( = 2 raised to the power of
- // bits/pixel).
-
- if (lpbi->biSize != sizeof(BITMAPCOREHEADER)) {
- if (lpbi->biClrUsed != 0)
- return (WORD) lpbi->biClrUsed;
- bits = lpbi->biBitCount;
- }
- else
- bits = lpbc->bcBitCount;
-
- switch (bits) {
- case 1:
- return 2;
- case 4:
- return 16;
- case 8:
- return 256;
- default:
- // A 24 bitcount DIB has no color table
- return 0;
- }
+ int bits;
+ BITMAPINFOHEADER *lpbi;
+ BITMAPCOREHEADER *lpbc;
+
+ lpbi = ((BITMAPINFOHEADER*) pv);
+ lpbc = ((BITMAPCOREHEADER*) pv);
+
+ /* With the BITMAPINFO format headers, the size of the palette
+ * is in biClrUsed, whereas in the BITMAPCORE - style headers, it
+ * is dependent on the bits per pixel ( = 2 raised to the power of
+ * bits/pixel).
+ */
+ if (lpbi->biSize != sizeof(BITMAPCOREHEADER)) {
+ if (lpbi->biClrUsed != 0)
+ return (WORD) lpbi->biClrUsed;
+ bits = lpbi->biBitCount;
+ }
+ else
+ bits = lpbc->bcBitCount;
+
+ switch (bits) {
+ case 1:
+ return 2;
+ case 4:
+ return 16;
+ case 8:
+ return 256;
+ default:
+ /* A 24 bitcount DIB has no color table */
+ return 0;
+ }
}
-// ----------------------------------------------------------------------------
-// FUNCTION : DibFromBitmap()
-// PURPOSE : Will create a global memory block in DIB format that
-// represents the Device-dependent bitmap (DDB) passed in.
-// RETURNS : A handle to the DIB
-// ----------------------------------------------------------------------------
+/****************************************************************************
+ * *
+ * FUNCTION : DibFromBitmap() *
+ * *
+ * PURPOSE : Will create a global memory block in DIB format that *
+ * represents the Device-dependent bitmap (DDB) passed in. *
+ * *
+ * RETURNS : A handle to the DIB *
+ * *
+ ****************************************************************************/
+
#if NOTHING
-static HANDLE DibFromBitmap(
- HBITMAP hbm,
- DWORD biStyle,
- WORD biBits,
- HPALETTE hpal)
+static HANDLE DibFromBitmap(HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal)
{
- BITMAP bm;
- BITMAPINFOHEADER bi;
- BITMAPINFOHEADER FAR *lpbi;
- DWORD dwLen;
- HANDLE hdib;
- HANDLE h;
- HDC hdc;
-
- if (!hbm)
- return NULL;
- if (hpal == NULL)
- hpal = GetStockObject(DEFAULT_PALETTE);
-
- GetObject(hbm, sizeof (bm), (LPSTR) &bm);
-
- if (biBits == 0)
- biBits = bm.bmPlanes * bm.bmBitsPixel;
-
- bi.biSize = sizeof(BITMAPINFOHEADER);
- bi.biWidth = bm.bmWidth;
- bi.biHeight = bm.bmHeight;
- bi.biPlanes = 1;
- bi.biBitCount = biBits;
- bi.biCompression = biStyle;
- bi.biSizeImage = 0;
- bi.biXPelsPerMeter = 0;
- bi.biYPelsPerMeter = 0;
- bi.biClrUsed = 0;
- bi.biClrImportant = 0;
-
- dwLen = bi.biSize + wxPaletteSize(&bi);
-
- hdc = GetDC((HWND) NULL);
- hpal = SelectPalette(hdc, hpal, FALSE);
- RealizePalette(hdc);
-
- hdib = GlobalAlloc(GHND, dwLen);
-
- if (!hdib) {
- SelectPalette(hdc, hpal, FALSE);
- ReleaseDC(NULL, hdc);
- return NULL;
- }
+ BITMAP bm;
+ BITMAPINFOHEADER bi;
+ BITMAPINFOHEADER FAR *lpbi;
+ DWORD dwLen;
+ HANDLE hdib;
+ HANDLE h;
+ HDC hdc;
+
+ if (!hbm)
+ return NULL;
+
+ if (hpal == NULL)
+ hpal = GetStockObject(DEFAULT_PALETTE);
+
+ GetObject(hbm, sizeof (bm), (LPSTR) &bm);
+
+ if (biBits == 0)
+ biBits = bm.bmPlanes * bm.bmBitsPixel;
+
+ bi.biSize = sizeof(BITMAPINFOHEADER);
+ bi.biWidth = bm.bmWidth;
+ bi.biHeight = bm.bmHeight;
+ bi.biPlanes = 1;
+ bi.biBitCount = biBits;
+ bi.biCompression = biStyle;
+ bi.biSizeImage = 0;
+ bi.biXPelsPerMeter = 0;
+ bi.biYPelsPerMeter = 0;
+ bi.biClrUsed = 0;
+ bi.biClrImportant = 0;
+
+ dwLen = bi.biSize + wxPaletteSize(&bi);
+
+ hdc = GetDC((HWND) NULL);
+ hpal = SelectPalette(hdc, hpal, FALSE);
+ RealizePalette(hdc);
+
+ hdib = GlobalAlloc(GHND, dwLen);
+
+ if (!hdib) {
+ SelectPalette(hdc, hpal, FALSE);
+ ReleaseDC(NULL, hdc);
+ return NULL;
+ }
#ifdef __WINDOWS_386__
- lpbi = (BITMAPINFOHEADER FAR *) MK_FP32(GlobalLock(hdib));
+ lpbi = (BITMAPINFOHEADER FAR *) MK_FP32(GlobalLock(hdib));
#else
- lpbi = (BITMAPINFOHEADER FAR *) GlobalLock(hdib);
+ lpbi = (BITMAPINFOHEADER FAR *) GlobalLock(hdib);
#endif
- *lpbi = bi;
-
- // call GetDIBits with a NULL lpBits param, so it will calculate the
- // biSizeImage field for us
- GetDIBits(hdc, hbm, 0, (WORD) bi.biHeight, NULL, (LPBITMAPINFO) lpbi, DIB_RGB_COLORS);
- bi = *lpbi;
- GlobalUnlock(hdib);
-
- // If the driver did not fill in the biSizeImage field, make one up
- if (bi.biSizeImage == 0) {
- bi.biSizeImage = WIDTHBYTES((DWORD)bm.bmWidth * biBits) * bm.bmHeight;
- if (biStyle != BI_RGB)
- bi.biSizeImage = (bi.biSizeImage * 3) / 2;
- }
+ *lpbi = bi;
- // realloc the buffer big enough to hold all the bits
- dwLen = bi.biSize + wxPaletteSize(&bi) + bi.biSizeImage;
- if (h = GlobalReAlloc(hdib, dwLen, 0))
- hdib = h;
- else {
- GlobalFree(hdib);
- hdib = NULL;
- SelectPalette(hdc, hpal, FALSE);
- ReleaseDC(NULL, hdc);
- return hdib;
- }
+ /* call GetDIBits with a NULL lpBits param, so it will calculate the
+ * biSizeImage field for us
+ */
+ GetDIBits(hdc, hbm, 0, (WORD) bi.biHeight,
+ NULL, (LPBITMAPINFO) lpbi, DIB_RGB_COLORS);
- // call GetDIBits with a NON-NULL lpBits param, and actualy get the
- // bits this time
+ bi = *lpbi;
+ GlobalUnlock(hdib);
+ /* If the driver did not fill in the biSizeImage field, make one up */
+ if (bi.biSizeImage == 0) {
+ bi.biSizeImage = WIDTHBYTES((DWORD)bm.bmWidth * biBits) * bm.bmHeight;
+
+ if (biStyle != BI_RGB)
+ bi.biSizeImage = (bi.biSizeImage * 3) / 2;
+ }
+
+ /* realloc the buffer big enough to hold all the bits */
+ dwLen = bi.biSize + wxPaletteSize(&bi) + bi.biSizeImage;
+ if (h = GlobalReAlloc(hdib, dwLen, 0))
+ hdib = h;
+ else {
+ GlobalFree(hdib);
+ hdib = NULL;
+
+ SelectPalette(hdc, hpal, FALSE);
+ ReleaseDC(NULL, hdc);
+ return hdib;
+ }
+
+ /* call GetDIBits with a NON-NULL lpBits param, and actualy get the
+ * bits this time
+ */
#ifdef __WINDOWS_386__
lpbi = (BITMAPINFOHEADER FAR *) MK_FP32(GlobalLock(hdib));
#else
lpbi = (BITMAPINFOHEADER FAR *) GlobalLock(hdib);
#endif
- if (GetDIBits(hdc,
- hbm,
- 0,
- (WORD) bi.biHeight,
- (LPSTR) lpbi + (WORD) lpbi->biSize + wxPaletteSize(lpbi),
- (LPBITMAPINFO) lpbi, DIB_RGB_COLORS) == 0) {
- GlobalUnlock(hdib);
- hdib = NULL;
- SelectPalette(hdc, hpal, FALSE);
- ReleaseDC((HWND) NULL, hdc);
- return NULL;
- }
+ if (GetDIBits(hdc,
+ hbm,
+ 0,
+ (WORD) bi.biHeight,
+ (LPSTR) lpbi + (WORD) lpbi->biSize + wxPaletteSize(lpbi),
+ (LPBITMAPINFO) lpbi, DIB_RGB_COLORS) == 0) {
+ GlobalUnlock(hdib);
+ hdib = NULL;
+ SelectPalette(hdc, hpal, FALSE);
+ ReleaseDC((HWND) NULL, hdc);
+ return NULL;
+ }
bi = *lpbi;
GlobalUnlock(hdib);
+
SelectPalette(hdc, hpal, FALSE);
ReleaseDC(NULL, hdc);
return hdib;
}
#endif
+ /************* PRIVATE ROUTINES TO READ/WRITE MORE THAN 64K ***************/
+/****************************************************************************
+ * *
+ * FUNCTION : lread(int fh, VOID FAR *pv, DWORD ul) *
+ * *
+ * PURPOSE : Reads data in steps of 32k till all the data has been read.*
+ * *
+ * RETURNS : 0 - If read did not proceed correctly. *
+ * number of bytes read otherwise. *
+ * *
+ ****************************************************************************/
+
+static DWORD PASCAL lread(int fh, void far *pv, DWORD ul)
+{
+ DWORD ulT = ul;
+#if defined(WINNT) || defined(__WIN32__) || defined(__WIN32__)
+ BYTE *hp = (BYTE *) pv;
+#else
+ BYTE huge *hp = (BYTE huge *) pv;
+#endif
+ while (ul > (DWORD) MAXREAD) {
+ if (_lread(fh, (LPSTR) hp, (WORD) MAXREAD) != MAXREAD)
+ return 0;
+ ul -= MAXREAD;
+ hp += MAXREAD;
+ }
+ if (_lread(fh, (LPSTR) hp, (WXUINT) ul) != (WXUINT) ul)
+ return 0;
+ return ulT;
+}
-//************* PRIVATE ROUTINES TO WRITE MORE THAN 64K ******************
-// ----------------------------------------------------------------------------
-// FUNCTION : lwrite(int fh, VOID FAR *pv, DWORD ul)
-// PURPOSE : Writes data in steps of 32k till all the data is written.
-// RETURNS : 0 - If write did not proceed correctly. number of bytes written otherwise.
-// ----------------------------------------------------------------------------
-static DWORD PASCAL lwrite(
- int fh,
- VOID FAR *pv,
- DWORD ul)
+/****************************************************************************
+ * *
+ * FUNCTION : lwrite(int fh, VOID FAR *pv, DWORD ul) *
+ * *
+ * PURPOSE : Writes data in steps of 32k till all the data is written. *
+ * *
+ * RETURNS : 0 - If write did not proceed correctly. *
+ * number of bytes written otherwise. *
+ * *
+ ****************************************************************************/
+
+static DWORD PASCAL lwrite(int fh, VOID FAR *pv, DWORD ul)
{
- DWORD ulT = ul;
-#if defined(WINNT) || defined(__WIN32__) || defined(__WIN32__) || defined(__WXWINE__)
- BYTE *hp = (BYTE *) pv;
+ DWORD ulT = ul;
+#if defined(WINNT) || defined(__WIN32__) || defined(__WIN32__)
+ BYTE *hp = (BYTE *) pv;
#else
- BYTE huge *hp = (BYTE huge *) pv;
+ BYTE huge *hp = (BYTE huge *) pv;
#endif
- while (ul > MAXREAD) {
- if (_lwrite(fh, (LPSTR) hp, (WORD) MAXREAD) != MAXREAD)
- return 0;
- ul -= MAXREAD;
- hp += MAXREAD;
- }
- if (_lwrite(fh, (LPSTR) hp, (WXUINT) ul) != (WXUINT) ul)
- return 0;
- return ulT;
+ while (ul > MAXREAD) {
+ if (_lwrite(fh, (LPSTR) hp, (WORD) MAXREAD) != MAXREAD)
+ return 0;
+ ul -= MAXREAD;
+ hp += MAXREAD;
+ }
+ if (_lwrite(fh, (LPSTR) hp, (WXUINT) ul) != (WXUINT) ul)
+ return 0;
+ return ulT;
}
-// ----------------------------------------------------------------------------
-// FUNCTION : ReadDIB(hWnd)
-// PURPOSE : Reads a DIB from a file, obtains a handle to its
-// BITMAPINFO struct. and loads the DIB. Once the DIB
-// is loaded, the function also creates a bitmap and
-// palette out of the DIB for a device-dependent form.
-// RETURNS : TRUE - DIB loaded and bitmap/palette created
-// The DIBINIT structure pointed to by pInfo is
-// filled with the appropriate handles.
-// FALSE - otherwise
-// ----------------------------------------------------------------------------
-BOOL wxReadDIB(
- LPTSTR lpFileName,
- HBITMAP *bitmap,
- HPALETTE *palette)
+/****************************************************************************
+ *
+ * FUNCTION : ReadDIB(hWnd)
+ *
+ * PURPOSE : Reads a DIB from a file, obtains a handle to its
+ * BITMAPINFO struct. and loads the DIB. Once the DIB
+ * is loaded, the function also creates a bitmap and
+ * palette out of the DIB for a device-dependent form.
+ *
+ * RETURNS : TRUE - DIB loaded and bitmap/palette created
+ * The DIBINIT structure pointed to by pInfo is
+ * filled with the appropriate handles.
+ * FALSE - otherwise
+ *
+ ****************************************************************************/
+BOOL wxReadDIB(LPTSTR lpFileName, HBITMAP *bitmap, HPALETTE *palette)
{
+ int fh;
LPBITMAPINFOHEADER lpbi;
- BITMAPFILEHEADER bf;
- WORD nNumColors;
+ OFSTRUCT of;
+ BITMAPFILEHEADER bf;
+ WORD nNumColors;
BOOL result = FALSE;
WORD offBits;
HDC hDC;
BOOL bCoreHead = FALSE;
HANDLE hDIB = 0;
- // JQ: We want to use wxFileSystem here in stead of Openfile so
- // that we can use other FS types like a zip files.
- wxFileSystem fsys;
- wxFSFile *file = fsys.OpenFile(lpFileName);
- wxInputStream *dibs = file->GetStream();
- if (!dibs) {
+ /* Open the file and get a handle to it's BITMAPINFO */
+
+ fh = OpenFile (wxConvertWX2MB(lpFileName), &of, OF_READ);
+ if (fh == -1) {
wxLogError(_("Can't open file '%s'"), lpFileName);
return (0);
- }
+ }
- hDIB = GlobalAlloc(GHND, (DWORD)(sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)));
+ hDIB = GlobalAlloc(GHND, (DWORD)(sizeof(BITMAPINFOHEADER) +
+ 256 * sizeof(RGBQUAD)));
if (!hDIB)
return(0);
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB);
#endif
- // JQ: read from the wxInputStream dibs instead of fh so
- // that we can use other FS types like zip files.
- dibs->Read((LPSTR)&bf,sizeof(bf));
- if (sizeof(bf) != dibs->LastRead())
+ /* read the BITMAPFILEHEADER */
+ if (sizeof (bf) != _lread (fh, (LPSTR)&bf, sizeof (bf)))
goto ErrExit;
- if (bf.bfType != 0x4d42) // 'BM'
+ if (bf.bfType != 0x4d42) /* 'BM' */
goto ErrExit;
- // JQ: read from the wxInputStream dibs instead of fh so
- // that we can use other FS types like zip files.
- dibs->Read((LPSTR)lpbi,sizeof(BITMAPCOREHEADER));
- if (sizeof(BITMAPCOREHEADER) != dibs->LastRead())
+ if (sizeof(BITMAPCOREHEADER) != _lread (fh, (LPSTR)lpbi, sizeof(BITMAPCOREHEADER)))
goto ErrExit;
- if (lpbi->biSize == sizeof(BITMAPCOREHEADER)){
+ if (lpbi->biSize == sizeof(BITMAPCOREHEADER))
+ {
lpbi->biSize = sizeof(BITMAPINFOHEADER);
lpbi->biBitCount = ((LPBITMAPCOREHEADER)lpbi)->bcBitCount;
lpbi->biPlanes = ((LPBITMAPCOREHEADER)lpbi)->bcPlanes;
lpbi->biHeight = ((LPBITMAPCOREHEADER)lpbi)->bcHeight;
lpbi->biWidth = ((LPBITMAPCOREHEADER)lpbi)->bcWidth;
bCoreHead = TRUE;
- }
- else {
-
- // JQ: Get to the start of the header and read INFOHEADER
- // using dibs wxInputStream
- dibs->SeekI(sizeof(BITMAPFILEHEADER),wxFromStart);
- if (dibs->LastError() != wxSTREAM_NO_ERROR)
- goto ErrExit;
-
- // JQ: read from the wxInputStream dibs instead of fh so
- // that we can use other FS types like zip files.
- // Can I do error checking with this?
- dibs->Read((LPSTR)lpbi,sizeof(BITMAPINFOHEADER));
- if (sizeof(BITMAPINFOHEADER) != dibs->LastRead())
+ }
+ else
+ {
+ // get to the start of the header and read INFOHEADER
+ _llseek(fh,sizeof(BITMAPFILEHEADER),SEEK_SET);
+ if (sizeof(BITMAPINFOHEADER) != _lread (fh, (LPSTR)lpbi, sizeof(BITMAPINFOHEADER)))
goto ErrExit;
-
- }
+ }
nNumColors = (WORD)lpbi->biClrUsed;
- if ( nNumColors == 0 ) {
- // no color table for 24-bit, default size otherwise
+ if ( nNumColors == 0 )
+ {
+ /* no color table for 24-bit, default size otherwise */
if (lpbi->biBitCount != 24)
- nNumColors = 1 << lpbi->biBitCount; // standard size table
- }
+ nNumColors = 1 << lpbi->biBitCount; /* standard size table */
+ }
- // fill in some default values if they are zero
+ /* fill in some default values if they are zero */
if (lpbi->biClrUsed == 0)
lpbi->biClrUsed = nNumColors;
- if (lpbi->biSizeImage == 0){
+ if (lpbi->biSizeImage == 0)
+ {
lpbi->biSizeImage = ((((lpbi->biWidth * (DWORD)lpbi->biBitCount) + 31) & ~31) >> 3)
- * lpbi->biHeight;
- }
+ * lpbi->biHeight;
+ }
- // get a proper-sized buffer for header, color table and bits
+ /* get a proper-sized buffer for header, color table and bits */
GlobalUnlock(hDIB);
- hDIB = GlobalReAlloc(hDIB, lpbi->biSize + nNumColors * sizeof(RGBQUAD) +
- lpbi->biSizeImage, 0);
-
- // can't resize buffer for loading
- if (!hDIB)
+ hDIB = GlobalReAlloc(hDIB, lpbi->biSize +
+ nNumColors * sizeof(RGBQUAD) +
+ lpbi->biSizeImage, 0);
+ if (!hDIB) /* can't resize buffer for loading */
goto ErrExit2;
#ifdef __WINDOWS_386__
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB);
#endif
- // read the color table
+ /* read the color table */
if (!bCoreHead)
- dibs->Read((LPSTR)lpbi + lpbi->biSize, nNumColors * sizeof(RGBQUAD));
- else {
+ _lread(fh, (LPSTR)(lpbi) + lpbi->biSize, nNumColors * sizeof(RGBQUAD));
+ else
+ {
signed int i;
RGBQUAD FAR *pQuad;
RGBTRIPLE FAR *pTriple;
- dibs->Read((LPSTR)lpbi + lpbi->biSize, nNumColors * sizeof(RGBTRIPLE));
+
+ _lread(fh, (LPSTR)(lpbi) + lpbi->biSize, nNumColors * sizeof(RGBTRIPLE));
+
pQuad = (RGBQUAD FAR *)((LPSTR)lpbi + lpbi->biSize);
pTriple = (RGBTRIPLE FAR *) pQuad;
- for (i = nNumColors - 1; i >= 0; i--){
+ for (i = nNumColors - 1; i >= 0; i--)
+ {
pQuad[i].rgbRed = pTriple[i].rgbtRed;
pQuad[i].rgbBlue = pTriple[i].rgbtBlue;
pQuad[i].rgbGreen = pTriple[i].rgbtGreen;
pQuad[i].rgbReserved = 0;
- }
}
+ }
- // offset to the bits from start of DIB header
+ /* offset to the bits from start of DIB header */
offBits = (WORD)(lpbi->biSize + nNumColors * sizeof(RGBQUAD));
if (bf.bfOffBits != 0L)
- dibs->SeekI(bf.bfOffBits, wxFromStart);
+ {
+ _llseek(fh,bf.bfOffBits,SEEK_SET);
+ }
- dibs->Read((LPSTR)lpbi + offBits,lpbi->biSizeImage);
- if (lpbi->biSizeImage == dibs->LastRead())
+ if (lpbi->biSizeImage == lread(fh, (LPSTR)lpbi + offBits, lpbi->biSizeImage))
{
GlobalUnlock(hDIB);
+
hDC = GetDC(NULL);
- if (!MakeBitmapAndPalette(hDC, hDIB, palette, bitmap))
+ if (!MakeBitmapAndPalette(hDC, hDIB, palette,
+ bitmap))
{
ReleaseDC(NULL,hDC);
goto ErrExit2;
ErrExit2:
GlobalFree(hDIB);
}
+
+ _lclose(fh);
return(result);
}
-// ----------------------------------------------------------------------------
-// FUNCTION : MakeBitmapAndPalette
-// PURPOSE : Given a DIB, creates a bitmap and corresponding palette
-// to be used for a device-dependent representation of
-// of the image.
-// RETURNS : TRUE --> success. phPal and phBitmap are filled with
-// appropriate handles. Caller is responsible for freeing objects.
-// FALSE --> unable to create objects. both pointer are not valid
-// ----------------------------------------------------------------------------
-static BOOL PASCAL MakeBitmapAndPalette(
- HDC hDC,
- HANDLE hDIB,
- HPALETTE * phPal,
- HBITMAP * phBitmap)
+/****************************************************************************
+ *
+ * FUNCTION : MakeBitmapAndPalette
+ *
+ * PURPOSE : Given a DIB, creates a bitmap and corresponding palette
+ * to be used for a device-dependent representation of
+ * of the image.
+ *
+ * RETURNS : TRUE --> success. phPal and phBitmap are filled with
+ * appropriate handles. Caller is responsible
+ * for freeing objects.
+ * FALSE --> unable to create objects. both pointer are
+ * not valid
+ *
+ ****************************************************************************/
+static BOOL PASCAL MakeBitmapAndPalette(HDC hDC, HANDLE hDIB,
+ HPALETTE * phPal, HBITMAP * phBitmap)
{
LPBITMAPINFOHEADER lpInfo;
BOOL result = FALSE;
}
GlobalUnlock (hDIB); // glt
+
return(result);
}
-// ----------------------------------------------------------------------------
-// FUNCTION : wxMakeDIBPalette(lpInfo)
-// PURPOSE : Given a BITMAPINFOHEADER, create a palette based on
-// the color table.
-// RETURNS : non-zero - handle of a corresponding palette
-// zero - unable to create palette
-// ----------------------------------------------------------------------------
-HPALETTE wxMakeDIBPalette(
- LPBITMAPINFOHEADER lpInfo )
+/****************************************************************************
+ * *
+ * FUNCTION : wxMakeDIBPalette(lpInfo) *
+ * *
+ * PURPOSE : Given a BITMAPINFOHEADER, create a palette based on
+ * the color table.
+ *
+ * *
+ * RETURNS : non-zero - handle of a corresponding palette
+ * zero - unable to create palette
+ * *
+ ****************************************************************************/
+HPALETTE wxMakeDIBPalette(LPBITMAPINFOHEADER lpInfo)
{
-#ifdef __WXWINE__
- return (FALSE);
-#else
LPLOGPALETTE npPal;
RGBQUAD far *lpRGB;
HPALETTE hLogPal;
WORD i;
- // since biClrUsed field was filled during the loading of the DIB,
- // we know it contains the number of colors in the color table.
+ /* since biClrUsed field was filled during the loading of the DIB,
+ ** we know it contains the number of colors in the color table.
+ */
if (lpInfo->biClrUsed)
{
/*
npPal = (LPLOGPALETTE)malloc(sizeof(LOGPALETTE) +
(WORD)lpInfo->biClrUsed * sizeof(PALETTEENTRY));
if (!npPal)
- return(FALSE);
+ return NULL;
npPal->palVersion = 0x300;
npPal->palNumEntries = (WORD)lpInfo->biClrUsed;
- // get pointer to the color table
+ /* get pointer to the color table */
lpRGB = (RGBQUAD FAR *)((LPSTR)lpInfo + lpInfo->biSize);
- // copy colors from the color table to the LogPalette structure
+ /* copy colors from the color table to the LogPalette structure */
for (i = 0; (DWORD)i < lpInfo->biClrUsed; i++, lpRGB++)
{
npPal->palPalEntry[i].peRed = lpRGB->rgbRed;
hLogPal = CreatePalette((LPLOGPALETTE)npPal);
// LocalFree((HANDLE)npPal);
free(npPal);
+
return(hLogPal);
}
- // 24-bit DIB with no color table. return default palette. Another
- // option would be to create a 256 color "rainbow" palette to provide
- // some good color choices.
+ /* 24-bit DIB with no color table. return default palette. Another
+ ** option would be to create a 256 color "rainbow" palette to provide
+ ** some good color choices.
+ */
else
return((HPALETTE) GetStockObject(DEFAULT_PALETTE));
-#endif
}
-// ----------------------------------------------------------------------------
-// FUNCTION :
-// PURPOSE :
-// RETURNS :
-// ----------------------------------------------------------------------------
-bool wxLoadIntoBitmap(
- wxChar *filename,
- wxBitmap *bitmap,
- wxPalette **pal)
+bool wxLoadIntoBitmap(wxChar *filename, wxBitmap *bitmap, wxPalette **pal)
{
- HBITMAP hBitmap;
- HPALETTE hPalette;
+ HBITMAP hBitmap = NULL;
+ HPALETTE hPalette = NULL;
- bool success = (wxReadDIB(filename, &hBitmap, &hPalette) != 0);
- if (!success)
- {
- DeleteObject(hPalette);
- return FALSE;
- }
+ bool success = (wxReadDIB(filename, &hBitmap, &hPalette) != 0);
+ if (!success)
+ {
if (hPalette)
- {
- if (pal)
- {
- *pal = new wxPalette;
- (*pal)->SetHPALETTE((WXHPALETTE) hPalette);
- }
- else
- DeleteObject(hPalette);
- }
- else if (pal)
- *pal = NULL;
+ DeleteObject(hPalette);
+ return FALSE;
+ }
- if (hBitmap)
+ if (hPalette)
+ {
+#if wxUSE_PALETTE
+ if (pal)
{
- BITMAP bm;
- GetObject(hBitmap, sizeof(bm), (LPSTR)&bm);
+ *pal = new wxPalette;
+ (*pal)->SetHPALETTE((WXHPALETTE) hPalette);
+ }
+ else
+#endif // wxUSE_PALETTE
+ DeleteObject(hPalette);
+ }
+ else if (pal)
+ *pal = NULL;
+
+ if (hBitmap)
+ {
+ BITMAP bm;
+ GetObject(hBitmap, sizeof(bm), (LPSTR)&bm);
- bitmap->SetHBITMAP((WXHBITMAP) hBitmap);
- bitmap->SetWidth(bm.bmWidth);
- bitmap->SetHeight(bm.bmHeight);
- bitmap->SetDepth(bm.bmPlanes * bm.bmBitsPixel);
+ bitmap->SetHBITMAP((WXHBITMAP) hBitmap);
+ bitmap->SetWidth(bm.bmWidth);
+ bitmap->SetHeight(bm.bmHeight);
+ bitmap->SetDepth(bm.bmPlanes * bm.bmBitsPixel);
#if WXWIN_COMPATIBILITY_2
- bitmap->SetOk(TRUE);
+ bitmap->SetOk(TRUE);
#endif // WXWIN_COMPATIBILITY_2
- return TRUE;
- }
- else return FALSE;
+ return TRUE;
+ }
+ else return FALSE;
}
-// ----------------------------------------------------------------------------
-// FUNCTION :
-// PURPOSE :
-// RETURNS :
-// ----------------------------------------------------------------------------
-wxBitmap *wxLoadBitmap(
- wxChar *filename,
- wxPalette **pal)
+wxBitmap *wxLoadBitmap(wxChar *filename, wxPalette **pal)
{
- wxBitmap *bitmap = new wxBitmap;
- if (wxLoadIntoBitmap(filename, bitmap, pal))
- return bitmap;
- else
- {
- delete bitmap;
- return NULL;
- }
+ wxBitmap *bitmap = new wxBitmap;
+ if (wxLoadIntoBitmap(filename, bitmap, pal))
+ return bitmap;
+ else
+ {
+ delete bitmap;
+ return NULL;
+ }
}
//---------------------------------------------------------------------
-// FUNCTION : InitBitmapInfoHeader
-// PURPOSE : Does a "standard" initialization of a BITMAPINFOHEADER,
-// given the Width, Height, and Bits per Pixel for the DIB.
//
-// By standard, I mean that all the relevant fields are set
-// to the specified values. biSizeImage is computed, the
-// biCompression field is set to "no compression," and all
-// other fields are 0.
+// Function: InitBitmapInfoHeader
+//
+// Purpose: Does a "standard" initialization of a BITMAPINFOHEADER,
+// given the Width, Height, and Bits per Pixel for the
+// DIB.
//
-// Note that DIBs only allow BitsPixel values of 1, 4, 8, or
-// 24. This routine makes sure that one of these values is
-// used (whichever is most appropriate for the specified
-// nBPP).
+// By standard, I mean that all the relevant fields are set
+// to the specified values. biSizeImage is computed, the
+// biCompression field is set to "no compression," and all
+// other fields are 0.
//
-// PARMS : lpBmInfoHdr == Far pointer to a BITMAPINFOHEADER structure
+// Note that DIBs only allow BitsPixel values of 1, 4, 8, or
+// 24. This routine makes sure that one of these values is
+// used (whichever is most appropriate for the specified
+// nBPP).
+//
+// Parms: lpBmInfoHdr == Far pointer to a BITMAPINFOHEADER structure
// to be filled in.
-// dwWidth == Width of DIB (not in Win 3.0 & 3.1, high
+// dwWidth == Width of DIB (not in Win 3.0 & 3.1, high
// word MUST be 0).
-// dwHeight == Height of DIB (not in Win 3.0 & 3.1, high
+// dwHeight == Height of DIB (not in Win 3.0 & 3.1, high
// word MUST be 0).
-// nBPP == Bits per Pixel for the DIB.
+// nBPP == Bits per Pixel for the DIB.
//
// History: Date Reason
// 11/07/91 Created
//
//---------------------------------------------------------------------
-static void InitBitmapInfoHeader (
- LPBITMAPINFOHEADER lpBmInfoHdr,
- DWORD dwWidth,
- DWORD dwHeight,
- int nBPP )
+
+static void InitBitmapInfoHeader (LPBITMAPINFOHEADER lpBmInfoHdr,
+ DWORD dwWidth,
+ DWORD dwHeight,
+ int nBPP)
{
// _fmemset (lpBmInfoHdr, 0, sizeof (BITMAPINFOHEADER));
memset (lpBmInfoHdr, 0, sizeof (BITMAPINFOHEADER));
lpBmInfoHdr->biSizeImage = WIDTHBYTES (dwWidth * nBPP) * dwHeight;
}
-// ----------------------------------------------------------------------------
-// FUNCTION :
-// PURPOSE :
-// RETURNS :
-// ----------------------------------------------------------------------------
+
+
+
LPSTR wxFindDIBBits (LPSTR lpbi)
{
return (lpbi + *(LPDWORD)lpbi + wxPaletteSize (lpbi));
}
//---------------------------------------------------------------------
+//
// Function: BitmapToDIB
//
// Purpose: Given a device dependent bitmap and a palette, returns
// 6/01/91 Created
//
//---------------------------------------------------------------------
-HANDLE wxBitmapToDIB (
- HBITMAP hBitmap,
- HPALETTE hPal)
+
+HANDLE wxBitmapToDIB (HBITMAP hBitmap, HPALETTE hPal)
{
- BITMAP Bitmap;
- BITMAPINFOHEADER bmInfoHdr;
- LPBITMAPINFOHEADER lpbmInfoHdr;
- LPSTR lpBits;
- HDC hMemDC;
- HANDLE hDIB;
- HPALETTE hOldPal = NULL;
-
- // Do some setup -- make sure the Bitmap passed in is valid,
- // get info on the bitmap (like its height, width, etc.),
- // then setup a BITMAPINFOHEADER.
+ BITMAP Bitmap;
+ BITMAPINFOHEADER bmInfoHdr;
+ LPBITMAPINFOHEADER lpbmInfoHdr;
+ LPSTR lpBits;
+ HDC hMemDC;
+ HANDLE hDIB;
+ HPALETTE hOldPal = NULL;
+
+ // Do some setup -- make sure the Bitmap passed in is valid,
+ // get info on the bitmap (like its height, width, etc.),
+ // then setup a BITMAPINFOHEADER.
if (!hBitmap)
return NULL;
Bitmap.bmPlanes * Bitmap.bmBitsPixel);
- // Now allocate memory for the DIB. Then, set the BITMAPINFOHEADER
- // into this memory, and find out where the bitmap bits go.
+ // Now allocate memory for the DIB. Then, set the BITMAPINFOHEADER
+ // into this memory, and find out where the bitmap bits go.
- hDIB = GlobalAlloc (GHND, sizeof (BITMAPINFOHEADER) +
- wxPaletteSize ((LPSTR) &bmInfoHdr) + bmInfoHdr.biSizeImage);
+ hDIB = GlobalAlloc (GHND, sizeof (BITMAPINFOHEADER) +
+ wxPaletteSize ((LPSTR) &bmInfoHdr) + bmInfoHdr.biSizeImage);
- if (!hDIB)
- return NULL;
+ if (!hDIB)
+ return NULL;
#ifdef __WINDOWS_386__
- lpbmInfoHdr = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock (hDIB));
+ lpbmInfoHdr = (LPBITMAPINFOHEADER) MK_FP32(GlobalLock (hDIB));
#else
- lpbmInfoHdr = (LPBITMAPINFOHEADER) GlobalLock (hDIB);
+ lpbmInfoHdr = (LPBITMAPINFOHEADER) GlobalLock (hDIB);
#endif
- *lpbmInfoHdr = bmInfoHdr;
- lpBits = wxFindDIBBits ((LPSTR) lpbmInfoHdr);
+ *lpbmInfoHdr = bmInfoHdr;
+ lpBits = wxFindDIBBits ((LPSTR) lpbmInfoHdr);
- // Now, we need a DC to hold our bitmap. If the app passed us
- // a palette, it should be selected into the DC.
- hMemDC = GetDC (NULL);
- if (hPal)
- {
- hOldPal = SelectPalette (hMemDC, hPal, FALSE);
- RealizePalette (hMemDC);
- }
+ // Now, we need a DC to hold our bitmap. If the app passed us
+ // a palette, it should be selected into the DC.
- // We're finally ready to get the DIB. Call the driver and let
- // it party on our bitmap. It will fill in the color table,
- // and bitmap bits of our global memory block.
- if (!GetDIBits (hMemDC,
+ hMemDC = GetDC (NULL);
+
+ if (hPal)
+ {
+ hOldPal = SelectPalette (hMemDC, hPal, FALSE);
+ RealizePalette (hMemDC);
+ }
+
+
+
+ // We're finally ready to get the DIB. Call the driver and let
+ // it party on our bitmap. It will fill in the color table,
+ // and bitmap bits of our global memory block.
+
+ if (!GetDIBits (hMemDC,
hBitmap,
0,
Bitmap.bmHeight,
lpBits,
(LPBITMAPINFO) lpbmInfoHdr,
DIB_RGB_COLORS))
- {
- GlobalUnlock (hDIB);
- GlobalFree (hDIB);
- hDIB = NULL;
- }
- else
- GlobalUnlock (hDIB);
+ {
+ GlobalUnlock (hDIB);
+ GlobalFree (hDIB);
+ hDIB = NULL;
+ }
+ else
+ GlobalUnlock (hDIB);
+
+
+ // Finally, clean up and return.
- // Finally, clean up and return.
if (hOldPal)
- SelectPalette (hMemDC, hOldPal, FALSE);
+ SelectPalette (hMemDC, hOldPal, FALSE);
ReleaseDC (NULL, hMemDC);
+
return hDIB;
}
-// ----------------------------------------------------------------------------
-// FUNCTION :
-// PURPOSE :
-// RETURNS :
-// ----------------------------------------------------------------------------
-bool wxSaveBitmap(
- wxChar *filename,
- wxBitmap *bitmap,
- wxPalette *colourmap)
+bool wxSaveBitmap(wxChar *filename, wxBitmap *bitmap, wxPalette *colourmap)
{
- HPALETTE hPalette = 0;
- if (colourmap)
- hPalette = (HPALETTE) colourmap->GetHPALETTE();
-
- HANDLE dibHandle = wxBitmapToDIB((HBITMAP) bitmap->GetHBITMAP(), hPalette);
- if (dibHandle)
- {
- bool success = (WriteDIB(filename, dibHandle) != 0);
- GlobalFree(dibHandle);
- return success;
- }
- else return FALSE;
+ HPALETTE hPalette = 0;
+#if wxUSE_PALETTE
+ if (colourmap)
+ hPalette = (HPALETTE) colourmap->GetHPALETTE();
+#endif // wxUSE_PALETTE
+
+ HANDLE dibHandle = wxBitmapToDIB((HBITMAP) bitmap->GetHBITMAP(), hPalette);
+ if (dibHandle)
+ {
+ bool success = (WriteDIB(filename, dibHandle) != 0);
+ GlobalFree(dibHandle);
+ return success;
+ }
+ else return FALSE;
}
-
projects / wxWidgets.git / blobdiff