diff options
Diffstat (limited to 'smelt/sdl/CxImage/ximawmf.h')
| -rw-r--r-- | smelt/sdl/CxImage/ximawmf.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/smelt/sdl/CxImage/ximawmf.h b/smelt/sdl/CxImage/ximawmf.h new file mode 100644 index 0000000..94fb168 --- /dev/null +++ b/smelt/sdl/CxImage/ximawmf.h @@ -0,0 +1,154 @@ +/*
+*********************************************************************
+ * File: ximawmf.h
+ * Purpose: Windows Metafile Class Loader and Writer
+ * Author: Volker Horch - vhorch@gmx.de
+ * created: 13-Jun-2002
+*********************************************************************
+ */
+
+/*
+*********************************************************************
+ Notes by Author:
+*********************************************************************
+
+ Limitations:
+ ============
+
+ a) Transparency:
+
+ A Metafile is vector graphics, which has transparency by design.
+ This class always converts into a Bitmap format. Transparency is
+ supported, but there is no good way to find out, which parts
+ of the Metafile are transparent. There are two ways how we can
+ handle this:
+
+ - Clear the Background of the Bitmap with the background color
+ you like (i have used COLOR_WINDOW) and don't support transparency.
+
+ below #define XMF_SUPPORT_TRANSPARENCY 0
+ #define XMF_COLOR_BACK RGB(Background color you like)
+
+ - Clear the Background of the Bitmap with a very unusual color
+ (which one ?) and use this color as the transparent color
+
+ below #define XMF_SUPPORT_TRANSPARENCY 1
+ #define XMF_COLOR_TRANSPARENT_R ...
+ #define XMF_COLOR_TRANSPARENT_G ...
+ #define XMF_COLOR_TRANSPARENT_B ...
+
+ b) Resolution
+
+ Once we have converted the Metafile into a Bitmap and we zoom in
+ or out, the image may not look very good. If we still had the
+ original Metafile, zooming would produce good results always.
+
+ c) Size
+
+ Although the filesize of a Metafile may be very small, it might
+ produce a Bitmap with a bombastic size. Assume you have a Metafile
+ with an image size of 6000*4000, which contains just one Metafile
+ record ((e.g. a line from (0,0) to (6000, 4000)). The filesize
+ of this Metafile would be let's say 100kB. If we convert it to
+ a 6000*4000 Bitmap with 24 Bits/Pixes, the Bitmap would consume
+ about 68MB of memory.
+
+ I have choosen, to limit the size of the Bitmap to max.
+ screensize, to avoid memory problems.
+
+ If you want something else,
+ modify #define XMF_MAXSIZE_CX / XMF_MAXSIZE_CY below
+
+*********************************************************************
+*/
+
+#ifndef _XIMAWMF_H
+#define _XIMAWMF_H
+
+#include "ximage.h"
+
+#if CXIMAGE_SUPPORT_WMF && CXIMAGE_SUPPORT_WINDOWS
+
+class CxImageWMF: public CxImage
+{
+
+#pragma pack(1)
+
+typedef struct tagRECT16
+{
+ int16_t left;
+ int16_t top;
+ int16_t right;
+ int16_t bottom;
+} RECT16;
+
+// taken from Windos 3.11 SDK Documentation (Programmer's Reference Volume 4: Resources)
+typedef struct tagMETAFILEHEADER
+{
+ uint32_t key; // always 0x9ac6cdd7
+ uint16_t reserved1; // reserved = 0
+ RECT16 bbox; // bounding rectangle in metafile units as defined in "inch"
+ uint16_t inch; // number of metafile units per inch (should be < 1440)
+ uint32_t reserved2; // reserved = 0
+ uint16_t checksum; // sum of the first 10 WORDS (using XOR operator)
+} METAFILEHEADER;
+
+#pragma pack()
+
+public:
+ CxImageWMF(): CxImage(CXIMAGE_FORMAT_WMF) { }
+
+ bool Decode(CxFile * hFile, int32_t nForceWidth=0, int32_t nForceHeight=0);
+ bool Decode(FILE *hFile, int32_t nForceWidth=0, int32_t nForceHeight=0)
+ { CxIOFile file(hFile); return Decode(&file,nForceWidth,nForceHeight); }
+
+#if CXIMAGE_SUPPORT_ENCODE
+ bool Encode(CxFile * hFile);
+ bool Encode(FILE *hFile) { CxIOFile file(hFile); return Encode(&file); }
+#endif // CXIMAGE_SUPPORT_ENCODE
+
+protected:
+ void ShrinkMetafile(int32_t &cx, int32_t &cy);
+ BOOL CheckMetafileHeader(METAFILEHEADER *pmetafileheader);
+ HENHMETAFILE ConvertWmfFiletoEmf(CxFile *pFile, METAFILEHEADER *pmetafileheader);
+ HENHMETAFILE ConvertEmfFiletoEmf(CxFile *pFile, ENHMETAHEADER *pemfh);
+
+};
+
+#define METAFILEKEY 0x9ac6cdd7L
+
+// Background color definition (if no transparency). see Notes above
+#define XMF_COLOR_BACK GetSysColor(COLOR_WINDOW)
+// alternatives
+//#define XMF_COLOR_BACK RGB(192, 192, 192) // lite gray
+//#define XMF_COLOR_BACK RGB( 0, 0, 0) // black
+//#define XMF_COLOR_BACK RGB(255, 255, 255) // white
+
+
+// transparency support. see Notes above
+#define XMF_SUPPORT_TRANSPARENCY 0
+#define XMF_COLOR_TRANSPARENT_R 211
+#define XMF_COLOR_TRANSPARENT_G 121
+#define XMF_COLOR_TRANSPARENT_B 112
+// don't change
+#define XMF_COLOR_TRANSPARENT RGB (XMF_COLOR_TRANSPARENT_R, \
+ XMF_COLOR_TRANSPARENT_G, \
+ XMF_COLOR_TRANSPARENT_B)
+// don't change
+#define XMF_RGBQUAD_TRANSPARENT XMF_COLOR_TRANSPARENT_B, \
+ XMF_COLOR_TRANSPARENT_G, \
+ XMF_COLOR_TRANSPARENT_R, \
+ 0
+// max. size. see Notes above
+// alternatives
+//#define XMF_MAXSIZE_CX (GetSystemMetrics(SM_CXSCREEN)-10)
+//#define XMF_MAXSIZE_CY (GetSystemMetrics(SM_CYSCREEN)-50)
+//#define XMF_MAXSIZE_CX (2*GetSystemMetrics(SM_CXSCREEN)/3)
+//#define XMF_MAXSIZE_CY (2*GetSystemMetrics(SM_CYSCREEN)/3)
+#define XMF_MAXSIZE_CX 4000
+#define XMF_MAXSIZE_CY 4000
+
+
+#endif
+
+#endif
|