template <class Channel,
size_t Bpp, int R, int G, int B, int A = -1,
class Pixel = wxUint32>
-
+
struct WXDLLEXPORT wxPixelFormat
{
// iterator over pixels is usually of type "ChannelType *"
enum { BitsPerPixel = Bpp };
// size of one pixel in ChannelType units (usually bytes)
- enum { SizePixel = BitsPerPixel / (8 * sizeof(ChannelType)) };
+ enum { SizePixel = Bpp / (8 * sizeof(Channel)) };
// the channels indices inside the pixel
enum
typedef wxPixelFormat<unsigned char, 24, 0, 1, 2> wxImagePixelFormat;
// the (most common) native bitmap format without alpha support
-typedef wxPixelFormat<unsigned char, 24,
- #ifdef __WXMSW__
- 2, 1, 0
- #else // !__WXMSW__
- 0, 1, 2
- #endif // __WXMSW__/!__WXMSW__
- > wxNativePixelFormat;
+#if defined(__WXMSW__)
+ // under MSW the RGB components are inversed, they're in BGR order
+ typedef wxPixelFormat<unsigned char, 24, 2, 1, 0> wxNativePixelFormat;
+
+ #define wxPIXEL_FORMAT_ALPHA 3
+#elif defined(__WXMAC__)
+ // under Mac, first component is unused but still present, hence we use
+ // 32bpp, not 24
+ typedef wxPixelFormat<unsigned char, 32, 1, 2, 3> wxNativePixelFormat;
+
+ #define wxPIXEL_FORMAT_ALPHA 0
+#endif
// the (most common) native format for bitmaps with alpha channel
-typedef wxPixelFormat<unsigned char, 32,
- wxNativePixelFormat::RED,
- wxNativePixelFormat::GREEN,
- wxNativePixelFormat::BLUE,
- 3> wxAlphaPixelFormat;
+#ifdef wxPIXEL_FORMAT_ALPHA
+ typedef wxPixelFormat<unsigned char, 32,
+ wxNativePixelFormat::RED,
+ wxNativePixelFormat::GREEN,
+ wxNativePixelFormat::BLUE,
+ wxPIXEL_FORMAT_ALPHA> wxAlphaPixelFormat;
+#endif // wxPIXEL_FORMAT_ALPHA
// we also define the (default/best) pixel format for the given class: this is
// used as default value for the pixel format in wxPixelIterator template
int GetWidth() const { return m_width; }
int GetHeight() const { return m_height; }
+ wxSize GetSize() const { return wxSize(m_width, m_height); }
+
// the distance between two rows
int GetRowStride() const { return m_stride; }
// private: -- see comment in the beginning of the file
- // NB: for efficiency reasons this class must *not* have any other
- // fields, otherwise it won't be put into a CPU register (as it
- // should inside the inner loops) by some compilers, notably
- // gcc
+ // for efficiency reasons this class should not have any other
+ // fields, otherwise it won't be put into a CPU register (as it
+ // should inside the inner loops) by some compilers, notably gcc
ChannelType *m_ptr;
};