#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
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;
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 = int(src_x - scale_factor_x/2.0 + 1);
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];
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;
}
// 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);
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 r = image.GetMaskRed();
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;
}
}
}
- 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;
}
wxImageHandler * pHandler = FindHandler(ext, -1);
if (pHandler)
{
- SaveFile(filename, pHandler->GetType());
- return true;
+ return SaveFile(filename, pHandler->GetType());
}
wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
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 ( 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) &&
+ handler->LoadFile(this, stream, true/*verbose*/, index) )
+ {
+ return true;
+ }
}
wxLogWarning( _("No handler found for image type.") );
+
return false;
}
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
node = node->GetNext();
}
- return 0;
+ return NULL;
}
wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
return handler;
node = node->GetNext();
}
- return 0;
+ return NULL;
}
wxImageHandler *wxImage::FindHandler( long bitmapType )
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()
#endif // wxUSE_STREAMS
+/* static */
+wxImageResolution
+wxImageHandler::GetResolutionFromOptions(const wxImage& image, int *x, int *y)
+{
+ wxCHECK_MSG( x && y, wxIMAGE_RESOLUTION_NONE, _T("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
// ----------------------------------------------------------------------------
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;
+
+ const bool has_alpha = HasAlpha();
- 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 = wxRotatePoint (0, 0, cos_angle, sin_angle, p0);
- wxRealPoint p2 = wxRotatePoint (0, GetHeight(), cos_angle, sin_angle, p0);
- wxRealPoint p3 = wxRotatePoint (GetWidth(), 0, cos_angle, sin_angle, p0);
- wxRealPoint p4 = wxRotatePoint (GetWidth(), GetHeight(), 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 = 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 = wxRound(floor(src.x));
x2 = wxRound(ceil(src.x));
x1 = x2 = wxRound (src.x);
}
- if (0 < src.y && src.y < GetHeight() - 1)
+ if (0 < src.y && src.y < h - 1)
{
y1 = wxRound(floor(src.y));
y2 = wxRound(ceil(src.y));
}
}
}
- 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 = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
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