/**
Image option names.
*/
-#define wxIMAGE_OPTION_QUALITY wxString(wxT("quality"))
-#define wxIMAGE_OPTION_FILENAME wxString(wxT("FileName"))
-#define wxIMAGE_OPTION_RESOLUTION wxString(wxT("Resolution"))
-#define wxIMAGE_OPTION_RESOLUTIONX wxString(wxT("ResolutionX"))
-#define wxIMAGE_OPTION_RESOLUTIONY wxString(wxT("ResolutionY"))
-#define wxIMAGE_OPTION_RESOLUTIONUNIT wxString(wxT("ResolutionUnit"))
-#define wxIMAGE_OPTION_MAX_WIDTH wxString(wxT("MaxWidth"))
-#define wxIMAGE_OPTION_MAX_HEIGHT wxString(wxT("MaxHeight"))
-
-#define wxIMAGE_OPTION_BMP_FORMAT wxString(wxT("wxBMP_FORMAT"))
-#define wxIMAGE_OPTION_CUR_HOTSPOT_X wxString(wxT("HotSpotX"))
-#define wxIMAGE_OPTION_CUR_HOTSPOT_Y wxString(wxT("HotSpotY"))
-
-#define wxIMAGE_OPTION_GIF_COMMENT wxString(wxT("GifComment"))
-
-#define wxIMAGE_OPTION_PNG_FORMAT wxString(wxT("PngFormat"))
-#define wxIMAGE_OPTION_PNG_BITDEPTH wxString(wxT("PngBitDepth"))
-#define wxIMAGE_OPTION_PNG_FILTER wxString(wxT("PngF"))
-#define wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL wxString(wxT("PngZL"))
-#define wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL wxString(wxT("PngZM"))
-#define wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY wxString(wxT("PngZS"))
-#define wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE wxString(wxT("PngZB"))
-
-#define wxIMAGE_OPTION_TIFF_BITSPERSAMPLE wxString(wxT("BitsPerSample"))
-#define wxIMAGE_OPTION_TIFF_SAMPLESPERPIXEL wxString(wxT("SamplesPerPixel"))
-#define wxIMAGE_OPTION_TIFF_COMPRESSION wxString(wxT("Compression"))
-#define wxIMAGE_OPTION_TIFF_PHOTOMETRIC wxString(wxT("Photometric"))
-#define wxIMAGE_OPTION_TIFF_IMAGEDESCRIPTOR wxString(wxT("ImageDescriptor"))
+#define wxIMAGE_OPTION_QUALITY wxString("quality")
+#define wxIMAGE_OPTION_FILENAME wxString("FileName")
+#define wxIMAGE_OPTION_RESOLUTION wxString("Resolution")
+#define wxIMAGE_OPTION_RESOLUTIONX wxString("ResolutionX")
+#define wxIMAGE_OPTION_RESOLUTIONY wxString("ResolutionY")
+#define wxIMAGE_OPTION_RESOLUTIONUNIT wxString("ResolutionUnit")
+#define wxIMAGE_OPTION_MAX_WIDTH wxString("MaxWidth")
+#define wxIMAGE_OPTION_MAX_HEIGHT wxString("MaxHeight")
+#define wxIMAGE_OPTION_ORIGINAL_WIDTH wxString("OriginalWidth")
+#define wxIMAGE_OPTION_ORIGINAL_HEIGHT wxString("OriginalHeight")
+
+#define wxIMAGE_OPTION_BMP_FORMAT wxString("wxBMP_FORMAT")
+#define wxIMAGE_OPTION_CUR_HOTSPOT_X wxString("HotSpotX")
+#define wxIMAGE_OPTION_CUR_HOTSPOT_Y wxString("HotSpotY")
+
+#define wxIMAGE_OPTION_GIF_COMMENT wxString("GifComment")
+
+#define wxIMAGE_OPTION_PNG_FORMAT wxString("PngFormat")
+#define wxIMAGE_OPTION_PNG_BITDEPTH wxString("PngBitDepth")
+#define wxIMAGE_OPTION_PNG_FILTER wxString("PngF")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL wxString("PngZL")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL wxString("PngZM")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY wxString("PngZS")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE wxString("PngZB")
+
+#define wxIMAGE_OPTION_TIFF_BITSPERSAMPLE wxString("BitsPerSample")
+#define wxIMAGE_OPTION_TIFF_SAMPLESPERPIXEL wxString("SamplesPerPixel")
+#define wxIMAGE_OPTION_TIFF_COMPRESSION wxString("Compression")
+#define wxIMAGE_OPTION_TIFF_PHOTOMETRIC wxString("Photometric")
+#define wxIMAGE_OPTION_TIFF_IMAGEDESCRIPTOR wxString("ImageDescriptor")
enum
@since 2.9.2
*/
static wxVersionInfo GetLibraryVersionInfo();
+
+protected:
+ /**
+ Called to get the number of images available in a multi-image file
+ type, if supported.
+
+ NOTE: this function is allowed to change the current stream position
+ since GetImageCount() will take care of restoring it later
+ */
+ virtual int DoGetImageCount( wxInputStream& stream );
+
+ /**
+ Called to test if this handler can read an image from the given stream.
+
+ NOTE: this function is allowed to change the current stream position
+ since CallDoCanRead() will take care of restoring it later
+ */
+ virtual bool DoCanRead( wxInputStream& stream ) = 0;
};
*/
const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
+const unsigned char wxIMAGE_ALPHA_THRESHOLD = 0x80;
+
+
/**
@class wxImage
This is most often used when doing direct image manipulation.
The return value points to an array of characters in RGBRGBRGB... format
in the top-to-bottom, left-to-right order, that is the first RGB triplet
- corresponds to the pixel first pixel of the first row, the second one ---
+ corresponds to the first pixel of the first row, the second one ---
to the second pixel of the first row and so on until the end of the first
row, with second row following after it and so on.
handler, this is still what happens however). These options must be
set before calling LoadFile() to have any effect.
+ @li @c wxIMAGE_OPTION_ORIGINAL_WIDTH and @c wxIMAGE_OPTION_ORIGINAL_HEIGHT:
+ These options will return the original size of the image if either
+ @c wxIMAGE_OPTION_MAX_WIDTH or @c wxIMAGE_OPTION_MAX_HEIGHT is
+ specified.
+ @since 2.9.3
+
@li @c wxIMAGE_OPTION_QUALITY: JPEG quality used when saving. This is an
integer in 0..100 range with 0 meaning very poor and 100 excellent
(but very badly compressed). This option is currently ignored for
bool IsOk() const;
/**
- Returns @true if the given pixel is transparent, i.e. either has the mask
+ Returns @true if the given pixel is transparent, i.e.\ either has the mask
colour if this image has a mask or if this image has alpha channel and alpha
value of this pixel is strictly less than @a threshold.
*/
projects / wxWidgets.git / blobdiff