#include "wx/module.h"
#include "wx/palette.h"
#include "wx/intl.h"
+ #include "wx/colour.h"
#endif
#include "wx/filefn.h"
#define HAS_FILE_STREAMS (wxUSE_STREAMS && (wxUSE_FILE || wxUSE_FFILE))
#if HAS_FILE_STREAMS
- #if wxUSE_FILE
- typedef wxFileInputStream wxImageFileInputStream;
- typedef wxFileOutputStream wxImageFileOutputStream;
- #elif wxUSE_FFILE
+ #if wxUSE_FFILE
typedef wxFFileInputStream wxImageFileInputStream;
typedef wxFFileOutputStream wxImageFileOutputStream;
+ #elif wxUSE_FILE
+ typedef wxFileInputStream wxImageFileInputStream;
+ typedef wxFileOutputStream wxImageFileOutputStream;
#endif // wxUSE_FILE/wxUSE_FFILE
#endif // HAS_FILE_STREAMS
#if wxUSE_VARIANT
-IMPLEMENT_VARIANT_OBJECT_EXPORTED(wxImage,WXDLLEXPORT)
+IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(wxImage,WXDLLEXPORT)
#endif
//-----------------------------------------------------------------------------
-// wxImage
+// global data
+//-----------------------------------------------------------------------------
+
+wxList wxImage::sm_handlers;
+wxImage wxNullImage;
+
+//-----------------------------------------------------------------------------
+// wxImageRefData
//-----------------------------------------------------------------------------
class wxImageRefData: public wxObjectRefData
int m_width;
int m_height;
+ wxBitmapType m_type;
unsigned char *m_data;
bool m_hasMask;
wxArrayString m_optionNames;
wxArrayString m_optionValues;
- DECLARE_NO_COPY_CLASS(wxImageRefData)
+ wxDECLARE_NO_COPY_CLASS(wxImageRefData);
};
wxImageRefData::wxImageRefData()
{
m_width = 0;
m_height = 0;
+ m_type = wxBITMAP_TYPE_INVALID;
m_data =
m_alpha = (unsigned char *) NULL;
free( m_alpha );
}
-wxList wxImage::sm_handlers;
-
-wxImage wxNullImage;
+//-----------------------------------------------------------------------------
+// wxImage
//-----------------------------------------------------------------------------
-#define M_IMGDATA wx_static_cast(wxImageRefData*, m_refData)
+#define M_IMGDATA static_cast<wxImageRefData*>(m_refData)
IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
-wxImage::wxImage( int width, int height, bool clear )
-{
- Create( width, height, clear );
-}
-
-wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
-{
- Create( width, height, data, static_data );
-}
-
-wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
-{
- Create( width, height, data, alpha, static_data );
-}
-
-wxImage::wxImage( const wxString& name, long type, int index )
-{
- LoadFile( name, type, index );
-}
-
-wxImage::wxImage( const wxString& name, const wxString& mimetype, int index )
-{
- LoadFile( name, mimetype, index );
-}
-
-#if wxUSE_STREAMS
-wxImage::wxImage( wxInputStream& stream, long type, int index )
-{
- LoadFile( stream, type, index );
-}
-
-wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
-{
- LoadFile( stream, mimetype, index );
-}
-#endif // wxUSE_STREAMS
-
-wxImage::wxImage(const char* const* xpmData)
-{
- Create(xpmData);
-}
-
bool wxImage::Create(const char* const* xpmData)
{
#if wxUSE_XPM
return false;
}
- if (clear)
- memset(M_IMGDATA->m_data, 0, width*height*3);
-
M_IMGDATA->m_width = width;
M_IMGDATA->m_height = height;
M_IMGDATA->m_ok = true;
+ if (clear)
+ {
+ Clear();
+ }
+
return true;
}
{
UnRef();
- wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
+ wxCHECK_MSG( data, false, wxT("NULL data in wxImage::Create") );
m_refData = new wxImageRefData();
{
UnRef();
- wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
+ wxCHECK_MSG( data, false, wxT("NULL data in wxImage::Create") );
m_refData = new wxImageRefData();
M_IMGDATA->m_height = height;
M_IMGDATA->m_ok = true;
M_IMGDATA->m_static = static_data;
+ M_IMGDATA->m_staticAlpha = static_data;
return true;
}
UnRef();
}
+void wxImage::Clear(unsigned char value)
+{
+ memset(M_IMGDATA->m_data, value, M_IMGDATA->m_width*M_IMGDATA->m_height*3);
+}
+
wxObjectRefData* wxImage::CreateRefData() const
{
return new wxImageRefData;
wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const
{
- const wxImageRefData* refData = wx_static_cast(const wxImageRefData*, that);
+ const wxImageRefData* refData = static_cast<const wxImageRefData*>(that);
wxCHECK_MSG(refData->m_ok, NULL, wxT("invalid image") );
wxImageRefData* refData_new = new wxImageRefData;
return image;
}
-wxImage wxImage::Scale( int width, int height, int quality ) const
+wxImage
+wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const
{
wxImage image;
if ( old_width == width && old_height == height )
return *this;
- // Scale the image (...or more appropriately, resample the image) using
- // either the high-quality or normal method as specified
- if ( quality == wxIMAGE_QUALITY_HIGH )
- {
- // We need to check whether we are downsampling or upsampling the image
- if ( width < old_width && height < old_height )
- {
- // Downsample the image using the box averaging method for best results
- image = ResampleBox(width, height);
- }
- else
- {
- // For upsampling or other random/wierd image dimensions we'll use
- // a bicubic b-spline scaling method
- image = ResampleBicubic(width, height);
- }
- }
- else // Default scaling method == simple pixel replication
- {
- if ( old_width % width == 0 && old_width >= width &&
- old_height % height == 0 && old_height >= height )
- {
- return ShrinkBy( old_width / width , old_height / height ) ;
- }
- image.Create( width, height, false );
-
- unsigned char *data = image.GetData();
-
- wxCHECK_MSG( data, image, wxT("unable to create image") );
-
- unsigned char *source_data = M_IMGDATA->m_data;
- unsigned char *target_data = data;
- unsigned char *source_alpha = 0 ;
- unsigned char *target_alpha = 0 ;
-
- if ( !M_IMGDATA->m_hasMask )
- {
- source_alpha = M_IMGDATA->m_alpha ;
- if ( source_alpha )
+ // resample the image using either the nearest neighbourhood, bilinear or
+ // bicubic method as specified
+ switch ( quality )
+ {
+ case wxIMAGE_QUALITY_BICUBIC:
+ case wxIMAGE_QUALITY_BILINEAR:
+ // both of these algorithms should be used for up-sampling the
+ // image only, when down-sampling always use box averaging for best
+ // results
+ if ( width < old_width && height < old_height )
+ image = ResampleBox(width, height);
+ else if ( quality == wxIMAGE_QUALITY_BILINEAR )
+ image = ResampleBilinear(width, height);
+ else if ( quality == wxIMAGE_QUALITY_BICUBIC )
+ image = ResampleBicubic(width, height);
+ break;
+
+ case wxIMAGE_QUALITY_NEAREST:
+ if ( old_width % width == 0 && old_width >= width &&
+ old_height % height == 0 && old_height >= height )
{
- image.SetAlpha() ;
- target_alpha = image.GetAlpha() ;
+ return ShrinkBy( old_width / width , old_height / height );
}
- }
-
- long x_delta = (old_width<<16) / width;
- long y_delta = (old_height<<16) / height;
-
- unsigned char* dest_pixel = target_data;
- long y = 0;
- for ( long j = 0; j < height; j++ )
- {
- unsigned char* src_line = &source_data[(y>>16)*old_width*3];
- unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
-
- long x = 0;
- for ( long i = 0; i < width; i++ )
- {
- unsigned char* src_pixel = &src_line[(x>>16)*3];
- unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;
- dest_pixel[0] = src_pixel[0];
- dest_pixel[1] = src_pixel[1];
- dest_pixel[2] = src_pixel[2];
- dest_pixel += 3;
- if ( source_alpha )
- *(target_alpha++) = *src_alpha_pixel ;
- x += x_delta;
- }
-
- y += y_delta;
- }
+ image = ResampleNearest(width, height);
+ break;
}
// If the original image has a mask, apply the mask to the new image
- if (M_IMGDATA->m_hasMask)
+ if (M_IMGDATA->m_hasMask)
{
image.SetMaskColour( M_IMGDATA->m_maskRed,
M_IMGDATA->m_maskGreen,
return image;
}
+wxImage wxImage::ResampleNearest(int width, int height) const
+{
+ wxImage image;
+ image.Create( width, height, false );
+
+ unsigned char *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
+
+ if ( !M_IMGDATA->m_hasMask )
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
+
+ long old_height = M_IMGDATA->m_height,
+ old_width = M_IMGDATA->m_width;
+ long x_delta = (old_width<<16) / width;
+ long y_delta = (old_height<<16) / height;
+
+ unsigned char* dest_pixel = target_data;
+
+ long y = 0;
+ for ( long j = 0; j < height; j++ )
+ {
+ unsigned char* src_line = &source_data[(y>>16)*old_width*3];
+ unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
+
+ long x = 0;
+ for ( long i = 0; i < width; i++ )
+ {
+ unsigned char* src_pixel = &src_line[(x>>16)*3];
+ unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;
+ dest_pixel[0] = src_pixel[0];
+ dest_pixel[1] = src_pixel[1];
+ dest_pixel[2] = src_pixel[2];
+ dest_pixel += 3;
+ if ( source_alpha )
+ *(target_alpha++) = *src_alpha_pixel ;
+ x += x_delta;
+ }
+
+ y += y_delta;
+ }
+
+ return image;
+}
+
wxImage wxImage::ResampleBox(int width, int height) const
{
// This function implements a simple pre-blur/box averaging method for
const int scale_factor_x_2 = (int)(scale_factor_x / 2);
const int scale_factor_y_2 = (int)(scale_factor_y / 2);
- // If we want good-looking results we need to pre-blur the image a bit first
- wxImage src_image(*this);
- src_image = src_image.BlurHorizontal(scale_factor_x_2);
- src_image = src_image.BlurVertical(scale_factor_y_2);
-
- unsigned char* src_data = src_image.GetData();
- unsigned char* src_alpha = src_image.GetAlpha();
+ unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* src_alpha = M_IMGDATA->m_alpha;
unsigned char* dst_data = ret_image.GetData();
unsigned char* dst_alpha = NULL;
averaged_pixels = 0;
sum_r = sum_g = sum_b = sum_a = 0.0;
- for ( int j = src_y - scale_factor_y_2 + 1;
+ for ( int j = int(src_y - scale_factor_y/2.0 + 1);
j <= int(src_y + scale_factor_y_2);
j++ )
{
// We don't care to average pixels that don't exist (edges)
- if ( j < 0 || j > M_IMGDATA->m_height )
+ if ( j < 0 || j > M_IMGDATA->m_height - 1 )
continue;
- for ( int i = src_x - scale_factor_x_2 + 1;
+ for ( int i = int(src_x - scale_factor_x/2.0 + 1);
i <= src_x + scale_factor_x_2;
i++ )
{
// Don't average edge pixels
- if ( i < 0 || i > M_IMGDATA->m_width )
+ if ( i < 0 || i > M_IMGDATA->m_width - 1 )
continue;
// Calculate the actual index in our source pixels
- src_pixel_index = src_y * M_IMGDATA->m_width + src_x;
+ src_pixel_index = j * M_IMGDATA->m_width + i;
sum_r += src_data[src_pixel_index * 3 + 0];
sum_g += src_data[src_pixel_index * 3 + 1];
return ret_image;
}
+wxImage wxImage::ResampleBilinear(int width, int height) const
+{
+ // This function implements a Bilinear algorithm for resampling.
+ wxImage ret_image(width, height, false);
+ unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ unsigned char* dst_data = ret_image.GetData();
+ unsigned char* dst_alpha = NULL;
+
+ if ( src_alpha )
+ {
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
+ }
+ double HFactor = double(M_IMGDATA->m_height) / height;
+ double WFactor = double(M_IMGDATA->m_width) / width;
+
+ int srcpixymax = M_IMGDATA->m_height - 1;
+ int srcpixxmax = M_IMGDATA->m_width - 1;
+
+ double srcpixy, srcpixy1, srcpixy2, dy, dy1;
+ double srcpixx, srcpixx1, srcpixx2, dx, dx1;
+
+ // initialize alpha values to avoid g++ warnings about possibly
+ // uninitialized variables
+ double r1, g1, b1, a1 = 0;
+ double r2, g2, b2, a2 = 0;
+
+ for ( int dsty = 0; dsty < height; dsty++ )
+ {
+ // We need to calculate the source pixel to interpolate from - Y-axis
+ srcpixy = double(dsty) * HFactor;
+ srcpixy1 = int(srcpixy);
+ srcpixy2 = ( srcpixy1 == srcpixymax ) ? srcpixy1 : srcpixy1 + 1.0;
+ dy = srcpixy - (int)srcpixy;
+ dy1 = 1.0 - dy;
+
+
+ for ( int dstx = 0; dstx < width; dstx++ )
+ {
+ // X-axis of pixel to interpolate from
+ srcpixx = double(dstx) * WFactor;
+ srcpixx1 = int(srcpixx);
+ srcpixx2 = ( srcpixx1 == srcpixxmax ) ? srcpixx1 : srcpixx1 + 1.0;
+ dx = srcpixx - (int)srcpixx;
+ dx1 = 1.0 - dx;
+
+ int x_offset1 = srcpixx1 < 0.0 ? 0 : srcpixx1 > srcpixxmax ? srcpixxmax : (int)srcpixx1;
+ int x_offset2 = srcpixx2 < 0.0 ? 0 : srcpixx2 > srcpixxmax ? srcpixxmax : (int)srcpixx2;
+ int y_offset1 = srcpixy1 < 0.0 ? 0 : srcpixy1 > srcpixymax ? srcpixymax : (int)srcpixy1;
+ int y_offset2 = srcpixy2 < 0.0 ? 0 : srcpixy2 > srcpixymax ? srcpixymax : (int)srcpixy2;
+
+ int src_pixel_index00 = y_offset1 * M_IMGDATA->m_width + x_offset1;
+ int src_pixel_index01 = y_offset1 * M_IMGDATA->m_width + x_offset2;
+ int src_pixel_index10 = y_offset2 * M_IMGDATA->m_width + x_offset1;
+ int src_pixel_index11 = y_offset2 * M_IMGDATA->m_width + x_offset2;
+
+ //first line
+ r1 = src_data[src_pixel_index00 * 3 + 0] * dx1 + src_data[src_pixel_index01 * 3 + 0] * dx;
+ g1 = src_data[src_pixel_index00 * 3 + 1] * dx1 + src_data[src_pixel_index01 * 3 + 1] * dx;
+ b1 = src_data[src_pixel_index00 * 3 + 2] * dx1 + src_data[src_pixel_index01 * 3 + 2] * dx;
+ if ( src_alpha )
+ a1 = src_alpha[src_pixel_index00] * dx1 + src_alpha[src_pixel_index01] * dx;
+
+ //second line
+ r2 = src_data[src_pixel_index10 * 3 + 0] * dx1 + src_data[src_pixel_index11 * 3 + 0] * dx;
+ g2 = src_data[src_pixel_index10 * 3 + 1] * dx1 + src_data[src_pixel_index11 * 3 + 1] * dx;
+ b2 = src_data[src_pixel_index10 * 3 + 2] * dx1 + src_data[src_pixel_index11 * 3 + 2] * dx;
+ if ( src_alpha )
+ a2 = src_alpha[src_pixel_index10] * dx1 + src_alpha[src_pixel_index11] * dx;
+
+ //result lines
+
+ dst_data[0] = static_cast<unsigned char>(r1 * dy1 + r2 * dy);
+ dst_data[1] = static_cast<unsigned char>(g1 * dy1 + g2 * dy);
+ dst_data[2] = static_cast<unsigned char>(b1 * dy1 + b2 * dy);
+ dst_data += 3;
+
+ if ( src_alpha )
+ *dst_alpha++ = static_cast<unsigned char>(a1 * dy1 + a2 * dy);
+ }
+ }
+
+ return ret_image;
+}
+
// The following two local functions are for the B-spline weighting of the
// bicubic sampling algorithm
static inline double spline_cube(double value)
for ( int dsty = 0; dsty < height; dsty++ )
{
// We need to calculate the source pixel to interpolate from - Y-axis
- double srcpixy = dsty * M_IMGDATA->m_height / height;
+ double srcpixy = double(dsty * M_IMGDATA->m_height) / height;
double dy = srcpixy - (int)srcpixy;
for ( int dstx = 0; dstx < width; dstx++ )
{
// X-axis of pixel to interpolate from
- double srcpixx = dstx * M_IMGDATA->m_width / width;
+ double srcpixx = double(dstx * M_IMGDATA->m_width) / width;
double dx = srcpixx - (int)srcpixx;
// Sums for each color channel
}
// Blur in the horizontal direction
-wxImage wxImage::BlurHorizontal(int blurRadius)
+wxImage wxImage::BlurHorizontal(int blurRadius) const
{
wxImage ret_image;
ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
unsigned char* dst_alpha = NULL;
// Check for a mask or alpha
- if ( M_IMGDATA->m_hasMask )
+ if ( src_alpha )
+ {
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
+ }
+ else if ( M_IMGDATA->m_hasMask )
{
ret_image.SetMaskColour(M_IMGDATA->m_maskRed,
M_IMGDATA->m_maskGreen,
M_IMGDATA->m_maskBlue);
}
- else
- {
- if ( src_alpha )
- {
- ret_image.SetAlpha();
- dst_alpha = ret_image.GetAlpha();
- }
- }
// number of pixels we average over
const int blurArea = blurRadius*2 + 1;
sum_a += src_alpha[pixel_idx];
// Save off the averaged data
- dst = dst_data + x*3 + y*M_IMGDATA->m_width;
+ dst = dst_data + x*3 + y*M_IMGDATA->m_width*3;
dst[0] = (unsigned char)(sum_r / blurArea);
dst[1] = (unsigned char)(sum_g / blurArea);
dst[2] = (unsigned char)(sum_b / blurArea);
}
// Blur in the vertical direction
-wxImage wxImage::BlurVertical(int blurRadius)
+wxImage wxImage::BlurVertical(int blurRadius) const
{
wxImage ret_image;
ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
unsigned char* dst_alpha = NULL;
// Check for a mask or alpha
- if ( M_IMGDATA->m_hasMask )
+ if ( src_alpha )
+ {
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
+ }
+ else if ( M_IMGDATA->m_hasMask )
{
ret_image.SetMaskColour(M_IMGDATA->m_maskRed,
M_IMGDATA->m_maskGreen,
M_IMGDATA->m_maskBlue);
}
- else
- {
- if ( src_alpha )
- {
- ret_image.SetAlpha();
- dst_alpha = ret_image.GetAlpha();
- }
- }
// number of pixels we average over
const int blurArea = blurRadius*2 + 1;
}
// The new blur function
-wxImage wxImage::Blur(int blurRadius)
+wxImage wxImage::Blur(int blurRadius) const
{
wxImage ret_image;
ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
image.SetRGB(wxRect(), r, g, b);
- wxRect subRect(pos.x, pos.y, width, height);
- wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
- if (pos.x < 0)
- finalRect.width -= pos.x;
- if (pos.y < 0)
- finalRect.height -= pos.y;
+ // we have two coordinate systems:
+ // source: starting at 0,0 of source image
+ // destination starting at 0,0 of destination image
+ // Documentation says:
+ // "The image is pasted into a new image [...] at the position pos relative
+ // to the upper left of the new image." this means the transition rule is:
+ // "dest coord" = "source coord" + pos;
+
+ // calculate the intersection using source coordinates:
+ wxRect srcRect(0, 0, width, height);
+ wxRect dstRect(-pos, size);
- subRect.Intersect(finalRect);
+ srcRect.Intersect(dstRect);
- if (!subRect.IsEmpty())
+ if (!srcRect.IsEmpty())
{
- if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height))
- image.Paste(*this, pos.x, pos.y);
+ // insertion point is needed in destination coordinates.
+ // NB: it is not always "pos"!
+ wxPoint ptInsert = srcRect.GetTopLeft() + pos;
+
+ if ((srcRect.GetWidth() == width) && (srcRect.GetHeight() == height))
+ image.Paste(*this, ptInsert.x, ptInsert.y);
else
- image.Paste(GetSubImage(subRect), pos.x, pos.y);
+ image.Paste(GetSubImage(srcRect), ptInsert.x, ptInsert.y);
}
return image;
(GetMaskGreen()==image.GetMaskGreen()) &&
(GetMaskBlue()==image.GetMaskBlue()))))
{
- width *= 3;
unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
int source_step = image.GetWidth()*3;
int target_step = M_IMGDATA->m_width*3;
for (int j = 0; j < height; j++)
{
- memcpy( target_data, source_data, width );
+ memcpy( target_data, source_data, width*3 );
source_data += source_step;
target_data += target_step;
}
- return;
+ }
+
+ // Copy over the alpha channel from the original image
+ if ( image.HasAlpha() )
+ {
+ if ( !HasAlpha() )
+ InitAlpha();
+
+ unsigned char* source_data = image.GetAlpha() + xx + yy*image.GetWidth();
+ int source_step = image.GetWidth();
+
+ unsigned char* target_data = GetAlpha() + (x+xx) + (y+yy)*M_IMGDATA->m_width;
+ int target_step = M_IMGDATA->m_width;
+
+ for (int j = 0; j < height; j++,
+ source_data += source_step,
+ target_data += target_step)
+ {
+ memcpy( target_data, source_data, width );
+ }
}
if (!HasMask() && image.HasMask())
unsigned char g = image.GetMaskGreen();
unsigned char b = image.GetMaskBlue();
- width *= 3;
unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
int source_step = image.GetWidth()*3;
for (int j = 0; j < height; j++)
{
- for (int i = 0; i < width; i+=3)
+ for (int i = 0; i < width*3; i+=3)
{
- if ((source_data[i] != r) &&
- (source_data[i+1] != g) &&
+ if ((source_data[i] != r) ||
+ (source_data[i+1] != g) ||
(source_data[i+2] != b))
{
memcpy( target_data+i, source_data+i, 3 );
}
}
-wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const
+wxImage wxImage::ConvertToGreyscale(void) const
+{
+ return ConvertToGreyscale(0.299, 0.587, 0.114);
+}
+
+wxImage wxImage::ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const
{
wxImage image;
const long size = M_IMGDATA->m_width * M_IMGDATA->m_height;
for ( long i = 0; i < size; i++, src += 3, dest += 3 )
{
+ memcpy(dest, src, 3);
// don't modify the mask
if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue )
{
- memcpy(dest, src, 3);
}
else
{
- // calculate the luma
- double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5;
- dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma);
+ wxColour::MakeGrey(dest + 0, dest + 1, dest + 2, weight_r, weight_g, weight_b);
}
}
for ( long i = 0; i < size; i++, srcd += 3, tard += 3 )
{
- if (srcd[0] == r && srcd[1] == g && srcd[2] == b)
- tard[0] = tard[1] = tard[2] = 255;
- else
- tard[0] = tard[1] = tard[2] = 0;
+ bool on = (srcd[0] == r) && (srcd[1] == g) && (srcd[2] == b);
+ wxColourBase::MakeMono(tard + 0, tard + 1, tard + 2, on);
}
return image;
}
+wxImage wxImage::ConvertToDisabled(unsigned char brightness) const
+{
+ wxImage image = *this;
+
+ unsigned char mr = image.GetMaskRed();
+ unsigned char mg = image.GetMaskGreen();
+ unsigned char mb = image.GetMaskBlue();
+
+ int width = image.GetWidth();
+ int height = image.GetHeight();
+ bool has_mask = image.HasMask();
+
+ for (int y = height-1; y >= 0; --y)
+ {
+ for (int x = width-1; x >= 0; --x)
+ {
+ unsigned char* data = image.GetData() + (y*(width*3))+(x*3);
+ unsigned char* r = data;
+ unsigned char* g = data+1;
+ unsigned char* b = data+2;
+
+ if (has_mask && (*r == mr) && (*g == mg) && (*b == mb))
+ continue;
+
+ wxColour::MakeDisabled(r, g, b, brightness);
+ }
+ }
+ return image;
+}
+
int wxImage::GetWidth() const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
return M_IMGDATA->m_height;
}
+wxBitmapType wxImage::GetType() const
+{
+ wxCHECK_MSG( IsOk(), wxBITMAP_TYPE_INVALID, wxT("invalid image") );
+
+ return M_IMGDATA->m_type;
+}
+
+void wxImage::SetType(wxBitmapType type)
+{
+ wxCHECK_RET( IsOk(), "must create the image before setting its type");
+
+ // type can be wxBITMAP_TYPE_INVALID to reset the image type to default
+ wxASSERT_MSG( type != wxBITMAP_TYPE_MAX, "invalid bitmap type" );
+
+ M_IMGDATA->m_type = type;
+}
+
long wxImage::XYToIndex(int x, int y) const
{
if ( Ok() &&
return M_IMGDATA->m_data[pos+2];
}
-bool wxImage::Ok() const
+bool wxImage::IsOk() const
{
// image of 0 width or height can't be considered ok - at least because it
// causes crashes in ConvertToBitmap() if we don't catch it in time
alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
}
- free(M_IMGDATA->m_alpha);
+ if( !M_IMGDATA->m_staticAlpha )
+ free(M_IMGDATA->m_alpha);
+
M_IMGDATA->m_alpha = alpha;
M_IMGDATA->m_staticAlpha = static_data;
}
}
}
+void wxImage::ClearAlpha()
+{
+ wxCHECK_RET( HasAlpha(), wxT("image already doesn't have an alpha channel") );
+
+ if ( !M_IMGDATA->m_staticAlpha )
+ free( M_IMGDATA->m_alpha );
+
+ M_IMGDATA->m_alpha = NULL;
+}
+
+
// ----------------------------------------------------------------------------
// mask support
// ----------------------------------------------------------------------------
bool wxImage::ConvertAlphaToMask(unsigned char threshold)
{
- if (!HasAlpha())
- return true;
+ if ( !HasAlpha() )
+ return false;
unsigned char mr, mg, mb;
- if (!FindFirstUnusedColour(&mr, &mg, &mb))
+ if ( !FindFirstUnusedColour(&mr, &mg, &mb) )
{
wxLogError( _("No unused colour in image being masked.") );
return false;
}
+ return ConvertAlphaToMask(mr, mg, mb, threshold);
+}
+
+bool wxImage::ConvertAlphaToMask(unsigned char mr,
+ unsigned char mg,
+ unsigned char mb,
+ unsigned char threshold)
+{
+ if ( !HasAlpha() )
+ return false;
+
AllocExclusive();
SetMask(true);
}
}
- free(M_IMGDATA->m_alpha);
+ if ( !M_IMGDATA->m_staticAlpha )
+ free(M_IMGDATA->m_alpha);
+
M_IMGDATA->m_alpha = NULL;
+ M_IMGDATA->m_staticAlpha = false;
return true;
}
void wxImage::SetOption(const wxString& name, const wxString& value)
{
- wxCHECK_RET( Ok(), wxT("invalid image") );
-
AllocExclusive();
int idx = M_IMGDATA->m_optionNames.Index(name, false);
- if (idx == wxNOT_FOUND)
+ if ( idx == wxNOT_FOUND )
{
M_IMGDATA->m_optionNames.Add(name);
M_IMGDATA->m_optionValues.Add(value);
wxString wxImage::GetOption(const wxString& name) const
{
- wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
+ if ( !M_IMGDATA )
+ return wxEmptyString;
int idx = M_IMGDATA->m_optionNames.Index(name, false);
- if (idx == wxNOT_FOUND)
+ if ( idx == wxNOT_FOUND )
return wxEmptyString;
else
return M_IMGDATA->m_optionValues[idx];
bool wxImage::HasOption(const wxString& name) const
{
- wxCHECK_MSG( Ok(), false, wxT("invalid image") );
-
- return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
+ return M_IMGDATA ? M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND
+ : false;
}
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
- long WXUNUSED_UNLESS_STREAMS(type),
+ wxBitmapType WXUNUSED_UNLESS_STREAMS(type),
int WXUNUSED_UNLESS_STREAMS(index) )
{
#if HAS_FILE_STREAMS
}
-
bool wxImage::SaveFile( const wxString& filename ) const
{
wxString ext = filename.AfterLast('.').Lower();
- wxImageHandler * pHandler = FindHandler(ext, -1);
- if (pHandler)
+ wxImageHandler *handler = FindHandler(ext, wxBITMAP_TYPE_ANY);
+ if ( !handler)
{
- SaveFile(filename, pHandler->GetType());
- return true;
+ wxLogError(_("Can't save image to file '%s': unknown extension."),
+ filename);
+ return false;
}
- wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
-
- return false;
+ return SaveFile(filename, handler->GetType());
}
bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
- int WXUNUSED_UNLESS_STREAMS(type) ) const
+ wxBitmapType WXUNUSED_UNLESS_STREAMS(type) ) const
{
#if HAS_FILE_STREAMS
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
}
int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name),
- long WXUNUSED_UNLESS_STREAMS(type) )
+ wxBitmapType WXUNUSED_UNLESS_STREAMS(type) )
{
#if HAS_FILE_STREAMS
wxImageFileInputStream stream(name);
return false;
}
-int wxImage::GetImageCount( wxInputStream &stream, long type )
+int wxImage::GetImageCount( wxInputStream &stream, wxBitmapType type )
{
wxImageHandler *handler;
if ( type == wxBITMAP_TYPE_ANY )
{
- wxList &list=GetHandlers();
+ const wxList& list = GetHandlers();
- for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
+ for ( wxList::compatibility_iterator node = list.GetFirst();
+ node;
+ node = node->GetNext() )
{
- handler=(wxImageHandler*)node->GetData();
+ handler = (wxImageHandler*)node->GetData();
if ( handler->CanRead(stream) )
- return handler->GetImageCount(stream);
+ {
+ const int count = handler->GetImageCount(stream);
+ if ( count >= 0 )
+ return count;
+ }
}
if ( !handler )
{
- wxLogWarning(_("No image handler for type %ld defined."), type);
+ wxLogWarning(_("No image handler for type %d defined."), type);
return false;
}
}
else
{
- wxLogError(_("Image file is not of type %ld."), type);
+ wxLogError(_("Image file is not of type %d."), type);
return 0;
}
}
-bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
+bool wxImage::DoLoad(wxImageHandler& handler, wxInputStream& stream, int index)
{
- UnRef();
+ // save the options values which can be clobbered by the handler (e.g. many
+ // of them call Destroy() before trying to load the file)
+ const unsigned maxWidth = GetOptionInt(wxIMAGE_OPTION_MAX_WIDTH),
+ maxHeight = GetOptionInt(wxIMAGE_OPTION_MAX_HEIGHT);
- m_refData = new wxImageRefData;
+ if ( !handler.LoadFile(this, stream, true/*verbose*/, index) )
+ return false;
+
+ // rescale the image to the specified size if needed
+ if ( maxWidth || maxHeight )
+ {
+ const unsigned widthOrig = GetWidth(),
+ heightOrig = GetHeight();
+
+ // this uses the same (trivial) algorithm as the JPEG handler
+ unsigned width = widthOrig,
+ height = heightOrig;
+ while ( (maxWidth && width > maxWidth) ||
+ (maxHeight && height > maxHeight) )
+ {
+ width /= 2;
+ height /= 2;
+ }
+
+ if ( width != widthOrig || height != heightOrig )
+ Rescale(width, height, wxIMAGE_QUALITY_HIGH);
+ }
+
+ // Set this after Rescale, which currently does not preserve it
+ M_IMGDATA->m_type = handler.GetType();
+
+ return true;
+}
+
+bool wxImage::LoadFile( wxInputStream& stream, wxBitmapType type, int index )
+{
+ AllocExclusive();
wxImageHandler *handler;
if ( type == wxBITMAP_TYPE_ANY )
{
- wxList &list=GetHandlers();
-
- for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
+ const wxList& list = GetHandlers();
+ for ( wxList::compatibility_iterator node = list.GetFirst();
+ node;
+ node = node->GetNext() )
{
- handler=(wxImageHandler*)node->GetData();
- if ( handler->CanRead(stream) )
- return handler->LoadFile(this, stream, true/*verbose*/, index);
-
+ handler = (wxImageHandler*)node->GetData();
+ if ( handler->CanRead(stream) && DoLoad(*handler, stream, index) )
+ return true;
}
wxLogWarning( _("No handler found for image type.") );
+
return false;
}
+ //else: have specific type
handler = FindHandler(type);
-
- if (handler == 0)
+ if ( !handler )
{
- wxLogWarning( _("No image handler for type %ld defined."), type );
-
+ wxLogWarning( _("No image handler for type %d defined."), type );
return false;
}
- if (stream.IsSeekable() && !handler->CanRead(stream))
+ if ( stream.IsSeekable() && !handler->CanRead(stream) )
{
- wxLogError(_("Image file is not of type %ld."), type);
+ wxLogError(_("Image file is not of type %d."), type);
return false;
}
- else
- return handler->LoadFile(this, stream, true/*verbose*/, index);
+
+ return DoLoad(*handler, stream, index);
}
bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
wxImageHandler *handler = FindHandlerMime(mimetype);
- if (handler == 0)
+ if ( !handler )
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
-
return false;
}
- if (stream.IsSeekable() && !handler->CanRead(stream))
+ if ( stream.IsSeekable() && !handler->CanRead(stream) )
{
- wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype);
+ wxLogError(_("Image file is not of type %s."), mimetype);
return false;
}
- else
- return handler->LoadFile( this, stream, true/*verbose*/, index );
+
+ return DoLoad(*handler, stream, index);
}
-bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
+bool wxImage::DoSave(wxImageHandler& handler, wxOutputStream& stream) const
+{
+ wxImage * const self = const_cast<wxImage *>(this);
+ if ( !handler.SaveFile(self, stream) )
+ return false;
+
+ M_IMGDATA->m_type = handler.GetType();
+ return true;
+}
+
+bool wxImage::SaveFile( wxOutputStream& stream, wxBitmapType type ) const
{
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
if ( !handler )
{
wxLogWarning( _("No image handler for type %d defined."), type );
-
return false;
}
- return handler->SaveFile( (wxImage*)this, stream );
+ return DoSave(*handler, stream);
}
bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const
if ( !handler )
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
-
- return false;
}
- return handler->SaveFile( (wxImage*)this, stream );
+ return DoSave(*handler, stream);
}
+
#endif // wxUSE_STREAMS
// ----------------------------------------------------------------------------
// may) we should probably refcount the duplicates.
// also an issue in InsertHandler below.
- wxLogDebug( _T("Adding duplicate image handler for '%s'"),
+ wxLogDebug( wxT("Adding duplicate image handler for '%s'"),
handler->GetName().c_str() );
delete handler;
}
else
{
// see AddHandler for additional comments.
- wxLogDebug( _T("Inserting duplicate image handler for '%s'"),
+ wxLogDebug( wxT("Inserting duplicate image handler for '%s'"),
handler->GetName().c_str() );
delete handler;
}
node = node->GetNext();
}
- return 0;
+ return NULL;
}
-wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
+wxImageHandler *wxImage::FindHandler( const wxString& extension, wxBitmapType bitmapType )
{
wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
{
wxImageHandler *handler = (wxImageHandler*)node->GetData();
- if ( (handler->GetExtension().Cmp(extension) == 0) &&
- (bitmapType == -1 || handler->GetType() == bitmapType) )
- return handler;
+ if ((bitmapType == wxBITMAP_TYPE_ANY) || (handler->GetType() == bitmapType))
+ {
+ if (handler->GetExtension() == extension)
+ return handler;
+ if (handler->GetAltExtensions().Index(extension, false) != wxNOT_FOUND)
+ return handler;
+ }
node = node->GetNext();
}
- return 0;
+ return NULL;
}
-wxImageHandler *wxImage::FindHandler( long bitmapType )
+wxImageHandler *wxImage::FindHandler(wxBitmapType bitmapType )
{
wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
if (handler->GetType() == bitmapType) return handler;
node = node->GetNext();
}
- return 0;
+ return NULL;
}
wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
node = node->GetNext();
}
- return 0;
+ return NULL;
}
void wxImage::InitStandardHandlers()
{
wxImageHandler* Handler = (wxImageHandler*)Node->GetData();
fmts += wxT("*.") + Handler->GetExtension();
+ for (size_t i = 0; i < Handler->GetAltExtensions().size(); i++)
+ fmts += wxT(";*.") + Handler->GetAltExtensions()[i];
Node = Node->GetNext();
if ( Node ) fmts += wxT(";");
}
IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject)
#if wxUSE_STREAMS
-bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
+int wxImageHandler::GetImageCount( wxInputStream& stream )
{
- return false;
-}
+ // NOTE: this code is the same of wxAnimationDecoder::CanRead and
+ // wxImageHandler::CallDoCanRead
-bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
-{
- return false;
-}
+ if ( !stream.IsSeekable() )
+ return false; // can't test unseekable stream
-int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
-{
- return 1;
+ wxFileOffset posOld = stream.TellI();
+ int n = DoGetImageCount(stream);
+
+ // restore the old position to be able to test other formats and so on
+ if ( stream.SeekI(posOld) == wxInvalidOffset )
+ {
+ wxLogDebug(wxT("Failed to rewind the stream in wxImageHandler!"));
+
+ // reading would fail anyhow as we're not at the right position
+ return false;
+ }
+
+ return n;
}
bool wxImageHandler::CanRead( const wxString& name )
bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
{
- wxFileOffset posOld = stream.TellI();
- if ( posOld == wxInvalidOffset )
- {
- // can't test unseekable stream
- return false;
- }
+ // NOTE: this code is the same of wxAnimationDecoder::CanRead and
+ // wxImageHandler::GetImageCount
+ if ( !stream.IsSeekable() )
+ return false; // can't test unseekable stream
+
+ wxFileOffset posOld = stream.TellI();
bool ok = DoCanRead(stream);
// restore the old position to be able to test other formats and so on
if ( stream.SeekI(posOld) == wxInvalidOffset )
{
- wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!"));
+ wxLogDebug(wxT("Failed to rewind the stream in wxImageHandler!"));
// reading would fail anyhow as we're not at the right position
return false;
#endif // wxUSE_STREAMS
+/* static */
+wxImageResolution
+wxImageHandler::GetResolutionFromOptions(const wxImage& image, int *x, int *y)
+{
+ wxCHECK_MSG( x && y, wxIMAGE_RESOLUTION_NONE, wxT("NULL pointer") );
+
+ if ( image.HasOption(wxIMAGE_OPTION_RESOLUTIONX) &&
+ image.HasOption(wxIMAGE_OPTION_RESOLUTIONY) )
+ {
+ *x = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX);
+ *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY);
+ }
+ else if ( image.HasOption(wxIMAGE_OPTION_RESOLUTION) )
+ {
+ *x =
+ *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTION);
+ }
+ else // no resolution options specified
+ {
+ *x =
+ *y = 0;
+
+ return wxIMAGE_RESOLUTION_NONE;
+ }
+
+ // get the resolution unit too
+ int resUnit = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT);
+ if ( !resUnit )
+ {
+ // this is the default
+ resUnit = wxIMAGE_RESOLUTION_INCHES;
+ }
+
+ return (wxImageResolution)resUnit;
+}
+
// ----------------------------------------------------------------------------
// image histogram stuff
// ----------------------------------------------------------------------------
* Rotation code by Carlos Moreno
*/
-// GRG: I've removed wxRotationPoint - we already have wxRealPoint which
-// does exactly the same thing. And I also got rid of wxRotationPixel
-// bacause of potential problems in architectures where alignment
-// is an issue, so I had to rewrite parts of the code.
-
-static const double gs_Epsilon = 1e-10;
-
-static inline int wxCint (double x)
-{
- return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
-}
-
+static const double wxROTATE_EPSILON = 1e-10;
// Auxiliary function to rotate a point (x,y) with respect to point p0
// make it inline and use a straight return to facilitate optimization
// repeating the time-consuming calls to these functions -- sin/cos can
// be computed and stored in the calling function.
-inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
+static inline wxRealPoint
+wxRotatePoint(const wxRealPoint& p, double cos_angle, double sin_angle,
+ const wxRealPoint& p0)
{
- return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
- p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
+ return wxRealPoint(p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
+ p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
}
-inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
+static inline wxRealPoint
+wxRotatePoint(double x, double y, double cos_angle, double sin_angle,
+ const wxRealPoint & p0)
{
- return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
+ return wxRotatePoint (wxRealPoint(x,y), cos_angle, sin_angle, p0);
}
-wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
+wxImage wxImage::Rotate(double angle,
+ const wxPoint& centre_of_rotation,
+ bool interpolating,
+ wxPoint *offset_after_rotation) const
{
- int i;
- angle = -angle; // screen coordinates are a mirror image of "real" coordinates
+ // screen coordinates are a mirror image of "real" coordinates
+ angle = -angle;
- bool has_alpha = HasAlpha();
+ const bool has_alpha = HasAlpha();
+
+ const int w = GetWidth();
+ const int h = GetHeight();
+
+ int i;
// Create pointer-based array to accelerate access to wxImage's data
- unsigned char ** data = new unsigned char * [GetHeight()];
+ unsigned char ** data = new unsigned char * [h];
data[0] = GetData();
- for (i = 1; i < GetHeight(); i++)
- data[i] = data[i - 1] + (3 * GetWidth());
+ for (i = 1; i < h; i++)
+ data[i] = data[i - 1] + (3 * w);
// Same for alpha channel
unsigned char ** alpha = NULL;
if (has_alpha)
{
- alpha = new unsigned char * [GetHeight()];
+ alpha = new unsigned char * [h];
alpha[0] = GetAlpha();
- for (i = 1; i < GetHeight(); i++)
- alpha[i] = alpha[i - 1] + GetWidth();
+ for (i = 1; i < h; i++)
+ alpha[i] = alpha[i - 1] + w;
}
// precompute coefficients for rotation formula
- // (sine and cosine of the angle)
const double cos_angle = cos(angle);
const double sin_angle = sin(angle);
const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
- wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0);
- wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0);
- wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0);
- wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0);
+ wxRealPoint p1 = wxRotatePoint (0, 0, cos_angle, sin_angle, p0);
+ wxRealPoint p2 = wxRotatePoint (0, h, cos_angle, sin_angle, p0);
+ wxRealPoint p3 = wxRotatePoint (w, 0, cos_angle, sin_angle, p0);
+ wxRealPoint p4 = wxRotatePoint (w, h, cos_angle, sin_angle, p0);
int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
*offset_after_rotation = wxPoint (x1a, y1a);
}
- // GRG: The rotated (destination) image is always accessed
- // sequentially, so there is no need for a pointer-based
- // array here (and in fact it would be slower).
- //
- unsigned char * dst = rotated.GetData();
+ // the rotated (destination) image is always accessed sequentially via this
+ // pointer, there is no need for pointer-based arrays here
+ unsigned char *dst = rotated.GetData();
- unsigned char * alpha_dst = NULL;
- if (has_alpha)
- alpha_dst = rotated.GetAlpha();
+ unsigned char *alpha_dst = has_alpha ? rotated.GetAlpha() : NULL;
- // GRG: if the original image has a mask, use its RGB values
- // as the blank pixel, else, fall back to default (black).
- //
+ // if the original image has a mask, use its RGB values as the blank pixel,
+ // else, fall back to default (black).
unsigned char blank_r = 0;
unsigned char blank_g = 0;
unsigned char blank_b = 0;
// performing an inverse rotation (a rotation of -angle) and getting the
// pixel at those coordinates
- // GRG: I've taken the (interpolating) test out of the loops, so that
- // it is done only once, instead of repeating it for each pixel.
+ const int rH = rotated.GetHeight();
+ const int rW = rotated.GetWidth();
- int x;
+ // do the (interpolating) test outside of the loops, so that it is done
+ // only once, instead of repeating it for each pixel.
if (interpolating)
{
- for (int y = 0; y < rotated.GetHeight(); y++)
+ for (int y = 0; y < rH; y++)
{
- for (x = 0; x < rotated.GetWidth(); x++)
+ for (int x = 0; x < rW; x++)
{
- wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
+ wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
- if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
- -0.25 < src.y && src.y < GetHeight() - 0.75)
+ if (-0.25 < src.x && src.x < w - 0.75 &&
+ -0.25 < src.y && src.y < h - 0.75)
{
// interpolate using the 4 enclosing grid-points. Those
// points can be obtained using floor and ceiling of the
// exact coordinates of the point
int x1, y1, x2, y2;
- if (0 < src.x && src.x < GetWidth() - 1)
+ if (0 < src.x && src.x < w - 1)
{
- x1 = wxCint(floor(src.x));
- x2 = wxCint(ceil(src.x));
+ x1 = wxRound(floor(src.x));
+ x2 = wxRound(ceil(src.x));
}
else // else means that x is near one of the borders (0 or width-1)
{
- x1 = x2 = wxCint (src.x);
+ x1 = x2 = wxRound (src.x);
}
- if (0 < src.y && src.y < GetHeight() - 1)
+ if (0 < src.y && src.y < h - 1)
{
- y1 = wxCint(floor(src.y));
- y2 = wxCint(ceil(src.y));
+ y1 = wxRound(floor(src.y));
+ y2 = wxRound(ceil(src.y));
}
else
{
- y1 = y2 = wxCint (src.y);
+ y1 = y2 = wxRound (src.y);
}
// get four points and the distances (square of the distance,
// GRG: Do not calculate the points until they are
// really needed -- this way we can calculate
// just one, instead of four, if d1, d2, d3
- // or d4 are < gs_Epsilon
+ // or d4 are < wxROTATE_EPSILON
const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1);
const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1);
// If the point is exactly at one point of the grid of the source
// image, then don't interpolate -- just assign the pixel
- if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs()
+ // d1,d2,d3,d4 are positive -- no need for abs()
+ if (d1 < wxROTATE_EPSILON)
{
unsigned char *p = data[y1] + (3 * x1);
*(dst++) = *(p++);
if (has_alpha)
*(alpha_dst++) = *(alpha[y1] + x1);
}
- else if (d2 < gs_Epsilon)
+ else if (d2 < wxROTATE_EPSILON)
{
unsigned char *p = data[y1] + (3 * x2);
*(dst++) = *(p++);
if (has_alpha)
*(alpha_dst++) = *(alpha[y1] + x2);
}
- else if (d3 < gs_Epsilon)
+ else if (d3 < wxROTATE_EPSILON)
{
unsigned char *p = data[y2] + (3 * x2);
*(dst++) = *(p++);
if (has_alpha)
*(alpha_dst++) = *(alpha[y2] + x2);
}
- else if (d4 < gs_Epsilon)
+ else if (d4 < wxROTATE_EPSILON)
{
unsigned char *p = data[y2] + (3 * x1);
*(dst++) = *(p++);
}
}
}
- else // not interpolating
+ else // not interpolating
{
- for (int y = 0; y < rotated.GetHeight(); y++)
+ for (int y = 0; y < rH; y++)
{
- for (x = 0; x < rotated.GetWidth(); x++)
+ for (int x = 0; x < rW; x++)
{
- wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
+ wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
- const int xs = wxCint (src.x); // wxCint rounds to the
- const int ys = wxCint (src.y); // closest integer
+ const int xs = wxRound (src.x); // wxRound rounds to the
+ const int ys = wxRound (src.y); // closest integer
- if (0 <= xs && xs < GetWidth() &&
- 0 <= ys && ys < GetHeight())
+ if (0 <= xs && xs < w && 0 <= ys && ys < h)
{
unsigned char *p = data[ys] + (3 * xs);
*(dst++) = *(p++);
}
delete [] data;
-
- if (has_alpha)
- delete [] alpha;
+ delete [] alpha;
return rotated;
}
DECLARE_DYNAMIC_CLASS(wxImageModule)
public:
wxImageModule() {}
- bool OnInit() { wxImage::InitStandardHandlers(); return true; };
- void OnExit() { wxImage::CleanUpHandlers(); };
+ bool OnInit() { wxImage::InitStandardHandlers(); return true; }
+ void OnExit() { wxImage::CleanUpHandlers(); }
};
IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
projects / wxWidgets.git / blobdiff