X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/55ccdb93e4ae4b606a4068cb37492c1ec3ed77a6..d50c083157f7280e9244595a7c0de72bbead2e7d:/src/common/image.cpp?ds=inline diff --git a/src/common/image.cpp b/src/common/image.cpp index 41d7b5e05c..cf7eb9538b 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -39,12 +39,12 @@ #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 @@ -538,13 +538,8 @@ wxImage wxImage::ResampleBox(int width, int height) const 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; @@ -576,7 +571,7 @@ wxImage wxImage::ResampleBox(int width, int height) const 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); @@ -584,11 +579,11 @@ wxImage wxImage::ResampleBox(int width, int height) const 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]; @@ -675,13 +670,13 @@ wxImage wxImage::ResampleBicubic(int width, int height) const 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 @@ -743,7 +738,7 @@ wxImage wxImage::ResampleBicubic(int width, int height) const } // 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); @@ -754,20 +749,17 @@ wxImage wxImage::BlurHorizontal(int blurRadius) 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; @@ -861,7 +853,7 @@ wxImage wxImage::BlurHorizontal(int blurRadius) } // 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); @@ -872,20 +864,17 @@ wxImage wxImage::BlurVertical(int blurRadius) 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; @@ -979,7 +968,7 @@ wxImage wxImage::BlurVertical(int blurRadius) } // 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); @@ -1294,6 +1283,26 @@ void wxImage::Paste( const wxImage &image, int x, int y ) 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(); @@ -1671,7 +1680,9 @@ void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) 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; } @@ -1904,8 +1915,11 @@ bool wxImage::ConvertAlphaToMask(unsigned char threshold) } } - 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; } @@ -2052,8 +2066,7 @@ bool wxImage::SaveFile( const wxString& filename ) const 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()); @@ -2145,13 +2158,19 @@ int wxImage::GetImageCount( wxInputStream &stream, long type ) 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; + } } @@ -2188,17 +2207,22 @@ bool wxImage::LoadFile( wxInputStream& stream, long type, int index ) 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; } @@ -2237,7 +2261,7 @@ bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int ind 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 @@ -2339,7 +2363,7 @@ wxImageHandler *wxImage::FindHandler( const wxString& name ) node = node->GetNext(); } - return 0; + return NULL; } wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) @@ -2353,7 +2377,7 @@ wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType return handler; node = node->GetNext(); } - return 0; + return NULL; } wxImageHandler *wxImage::FindHandler( long bitmapType ) @@ -2365,7 +2389,7 @@ wxImageHandler *wxImage::FindHandler( long bitmapType ) if (handler->GetType() == bitmapType) return handler; node = node->GetNext(); } - return 0; + return NULL; } wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) @@ -2377,7 +2401,7 @@ wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; node = node->GetNext(); } - return 0; + return NULL; } void wxImage::InitStandardHandlers() @@ -2651,6 +2675,42 @@ bool wxImageHandler::CallDoCanRead(wxInputStream& stream) #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 // ---------------------------------------------------------------------------- @@ -2781,18 +2841,7 @@ unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const * 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 @@ -2800,42 +2849,53 @@ static inline int wxCint (double x) // 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); @@ -2845,10 +2905,10 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i 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))); @@ -2866,19 +2926,14 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i *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; @@ -2895,44 +2950,45 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i // 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, @@ -2941,7 +2997,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i // 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); @@ -2954,7 +3010,8 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i // 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++); @@ -2964,7 +3021,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i 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++); @@ -2974,7 +3031,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i 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++); @@ -2984,7 +3041,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i 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++); @@ -3045,19 +3102,18 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i } } } - 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++); @@ -3081,9 +3137,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i } delete [] data; - - if (has_alpha) - delete [] alpha; + delete [] alpha; return rotated; } @@ -3101,8 +3155,8 @@ class wxImageModule: public wxModule 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)