X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a57ea0102f67075861696d97e784c1b68f12fc51..497b4e64ceeff10f40104d26139fa7f1ee347095:/src/common/image.cpp?ds=sidebyside diff --git a/src/common/image.cpp b/src/common/image.cpp index 62597542fd..5e44f4507e 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -443,13 +443,6 @@ wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const if ( old_width == width && old_height == height ) return *this; - if (quality == wxIMAGE_QUALITY_HIGH) - { - quality = (width < old_width && height < old_height) - ? wxIMAGE_QUALITY_BOX_AVERAGE - : wxIMAGE_QUALITY_BICUBIC; - } - // Resample the image using the method as specified. switch ( quality ) { @@ -474,6 +467,12 @@ wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const case wxIMAGE_QUALITY_BOX_AVERAGE: image = ResampleBox(width, height); break; + + case wxIMAGE_QUALITY_HIGH: + image = width < old_width && height < old_height + ? ResampleBox(width, height) + : ResampleBicubic(width, height); + break; } // If the original image has a mask, apply the mask to the new image @@ -552,6 +551,42 @@ wxImage wxImage::ResampleNearest(int width, int height) const return image; } +namespace +{ + +struct BoxPrecalc +{ + int boxStart; + int boxEnd; +}; + +inline int BoxBetween(int value, int low, int high) +{ + return wxMax(wxMin(value, high), low); +} + +void ResampleBoxPrecalc(wxVector& boxes, int oldDim) +{ + const int newDim = boxes.size(); + const double scale_factor_1 = double(oldDim) / newDim; + const int scale_factor_2 = (int)(scale_factor_1 / 2); + + for ( int dst = 0; dst < newDim; ++dst ) + { + // Source pixel in the Y direction + const int src_p = int(dst * scale_factor_1); + + BoxPrecalc& precalc = boxes[dst]; + precalc.boxStart = BoxBetween(int(src_p - scale_factor_1/2.0 + 1), + 0, oldDim - 1); + precalc.boxEnd = BoxBetween(wxMax(precalc.boxStart + 1, + int(src_p + scale_factor_2)), + 0, oldDim - 1); + } +} + +} // anonymous namespace + wxImage wxImage::ResampleBox(int width, int height) const { // This function implements a simple pre-blur/box averaging method for @@ -561,11 +596,12 @@ wxImage wxImage::ResampleBox(int width, int height) const wxImage ret_image(width, height, false); - const double scale_factor_x = double(M_IMGDATA->m_width) / width; - const double scale_factor_y = double(M_IMGDATA->m_height) / height; + wxVector vPrecalcs(height); + wxVector hPrecalcs(width); + + ResampleBoxPrecalc(vPrecalcs, M_IMGDATA->m_height); + ResampleBoxPrecalc(hPrecalcs, M_IMGDATA->m_width); - const int scale_factor_x_2 = (int)(scale_factor_x / 2); - const int scale_factor_y_2 = (int)(scale_factor_y / 2); const unsigned char* src_data = M_IMGDATA->m_data; const unsigned char* src_alpha = M_IMGDATA->m_alpha; @@ -584,33 +620,21 @@ wxImage wxImage::ResampleBox(int width, int height) const for ( int y = 0; y < height; y++ ) // Destination image - Y direction { // Source pixel in the Y direction - int src_y = (int)(y * scale_factor_y); + const BoxPrecalc& vPrecalc = vPrecalcs[y]; for ( int x = 0; x < width; x++ ) // Destination image - X direction { // Source pixel in the X direction - int src_x = (int)(x * scale_factor_x); + const BoxPrecalc& hPrecalc = hPrecalcs[x]; // Box of pixels to average averaged_pixels = 0; sum_r = sum_g = sum_b = sum_a = 0.0; - for ( int j = int(src_y - scale_factor_y/2.0 + 1), k = j; - j <= int(src_y + scale_factor_y_2) || j < k + 2; - j++ ) + for ( int j = vPrecalc.boxStart; j <= vPrecalc.boxEnd; ++j ) { - // We don't care to average pixels that don't exist (edges) - if ( j < 0 || j > M_IMGDATA->m_height - 1 ) - continue; - - for ( int i = int(src_x - scale_factor_x/2.0 + 1), e = i; - i <= src_x + scale_factor_x_2 || i < e + 2; - i++ ) + for ( int i = hPrecalc.boxStart; i <= hPrecalc.boxEnd; ++i ) { - // Don't average edge pixels - if ( i < 0 || i > M_IMGDATA->m_width - 1 ) - continue; - // Calculate the actual index in our source pixels src_pixel_index = j * M_IMGDATA->m_width + i; @@ -637,6 +661,49 @@ wxImage wxImage::ResampleBox(int width, int height) const return ret_image; } +namespace +{ + +struct BilinearPrecalc +{ + int offset1; + int offset2; + double dd; + double dd1; +}; + +void ResampleBilinearPrecalc(wxVector& precalcs, int oldDim) +{ + const int newDim = precalcs.size(); + const double scale_factor = double(oldDim) / newDim; + const int srcpixmax = oldDim - 1; + + for ( int dsty = 0; dsty < newDim; dsty++ ) + { + // We need to calculate the source pixel to interpolate from - Y-axis + double srcpix = double(dsty) * scale_factor; + double srcpix1 = int(srcpix); + double srcpix2 = srcpix1 == srcpixmax ? srcpix1 : srcpix1 + 1.0; + + BilinearPrecalc& precalc = precalcs[dsty]; + + precalc.dd = srcpix - (int)srcpix; + precalc.dd1 = 1.0 - precalc.dd; + precalc.offset1 = srcpix1 < 0.0 + ? 0 + : srcpix1 > srcpixmax + ? srcpixmax + : (int)srcpix1; + precalc.offset2 = srcpix2 < 0.0 + ? 0 + : srcpix2 > srcpixmax + ? srcpixmax + : (int)srcpix2; + } +} + +} // anonymous namespace + wxImage wxImage::ResampleBilinear(int width, int height) const { // This function implements a Bilinear algorithm for resampling. @@ -651,14 +718,11 @@ wxImage wxImage::ResampleBilinear(int width, int height) const 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; + wxVector vPrecalcs(height); + wxVector hPrecalcs(width); + ResampleBilinearPrecalc(vPrecalcs, M_IMGDATA->m_height); + ResampleBilinearPrecalc(hPrecalcs, M_IMGDATA->m_width); // initialize alpha values to avoid g++ warnings about possibly // uninitialized variables @@ -668,26 +732,22 @@ wxImage wxImage::ResampleBilinear(int width, int height) const 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; + const BilinearPrecalc& vPrecalc = vPrecalcs[dsty]; + const int y_offset1 = vPrecalc.offset1; + const int y_offset2 = vPrecalc.offset2; + const double dy = vPrecalc.dd; + const double dy1 = vPrecalc.dd1; 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; + const BilinearPrecalc& hPrecalc = hPrecalcs[dstx]; - 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; + const int x_offset1 = hPrecalc.offset1; + const int x_offset2 = hPrecalc.offset2; + const double dx = hPrecalc.dd; + const double dx1 = hPrecalc.dd1; int src_pixel_index00 = y_offset1 * M_IMGDATA->m_width + x_offset1; int src_pixel_index01 = y_offset1 * M_IMGDATA->m_width + x_offset2; @@ -738,6 +798,42 @@ static inline double spline_weight(double value) 4 * spline_cube(value - 1)) / 6; } + +namespace +{ + +struct BicubicPrecalc +{ + double weight[4]; + int offset[4]; +}; + +void ResampleBicubicPrecalc(wxVector &aWeight, int oldDim) +{ + const int newDim = aWeight.size(); + for ( int dstd = 0; dstd < newDim; dstd++ ) + { + // We need to calculate the source pixel to interpolate from - Y-axis + const double srcpixd = static_cast(dstd * oldDim) / newDim; + const double dd = srcpixd - static_cast(srcpixd); + + BicubicPrecalc &precalc = aWeight[dstd]; + + for ( int k = -1; k <= 2; k++ ) + { + precalc.offset[k + 1] = srcpixd + k < 0.0 + ? 0 + : srcpixd + k >= oldDim + ? oldDim - 1 + : static_cast(srcpixd + k); + + precalc.weight[k + 1] = spline_weight(k - dd); + } + } +} + +} // anonymous namespace + // This is the bicubic resampling algorithm wxImage wxImage::ResampleBicubic(int width, int height) const { @@ -782,17 +878,22 @@ wxImage wxImage::ResampleBicubic(int width, int height) const dst_alpha = ret_image.GetAlpha(); } + // Precalculate weights + wxVector vPrecalcs(height); + wxVector hPrecalcs(width); + + ResampleBicubicPrecalc(vPrecalcs, M_IMGDATA->m_height); + ResampleBicubicPrecalc(hPrecalcs, M_IMGDATA->m_width); + for ( int dsty = 0; dsty < height; dsty++ ) { // We need to calculate the source pixel to interpolate from - Y-axis - double srcpixy = double(dsty * M_IMGDATA->m_height) / height; - double dy = srcpixy - (int)srcpixy; + const BicubicPrecalc& vPrecalc = vPrecalcs[dsty]; for ( int dstx = 0; dstx < width; dstx++ ) { // X-axis of pixel to interpolate from - double srcpixx = double(dstx * M_IMGDATA->m_width) / width; - double dx = srcpixx - (int)srcpixx; + const BicubicPrecalc& hPrecalc = hPrecalcs[dstx]; // Sums for each color channel double sum_r = 0, sum_g = 0, sum_b = 0, sum_a = 0; @@ -801,21 +902,13 @@ wxImage wxImage::ResampleBicubic(int width, int height) const for ( int k = -1; k <= 2; k++ ) { // Y offset - int y_offset = srcpixy + k < 0.0 - ? 0 - : srcpixy + k >= M_IMGDATA->m_height - ? M_IMGDATA->m_height - 1 - : (int)(srcpixy + k); + const int y_offset = vPrecalc.offset[k + 1]; // Loop across the X axis for ( int i = -1; i <= 2; i++ ) { // X offset - int x_offset = srcpixx + i < 0.0 - ? 0 - : srcpixx + i >= M_IMGDATA->m_width - ? M_IMGDATA->m_width - 1 - : (int)(srcpixx + i); + const int x_offset = hPrecalc.offset[i + 1]; // Calculate the exact position where the source data // should be pulled from based on the x_offset and y_offset @@ -824,8 +917,8 @@ wxImage wxImage::ResampleBicubic(int width, int height) const // Calculate the weight for the specified pixel according // to the bicubic b-spline kernel we're using for // interpolation - double - pixel_weight = spline_weight(i - dx)*spline_weight(k - dy); + const double + pixel_weight = vPrecalc.weight[k + 1] * hPrecalc.weight[i + 1]; // Create a sum of all velues for each color channel // adjusted for the pixel's calculated weight @@ -2235,10 +2328,105 @@ bool wxImage::HasOption(const wxString& name) const // image I/O // ---------------------------------------------------------------------------- -bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), - wxBitmapType WXUNUSED_UNLESS_STREAMS(type), +// Under Windows we can load wxImage not only from files but also from +// resources. +#if defined(__WINDOWS__) && wxUSE_WXDIB && wxUSE_IMAGE + #define HAS_LOAD_FROM_RESOURCE +#endif + +#ifdef HAS_LOAD_FROM_RESOURCE + +#include "wx/msw/dib.h" +#include "wx/msw/private.h" + +static wxImage LoadImageFromResource(const wxString &name, wxBitmapType type) +{ + AutoHBITMAP + hBitmap, + hMask; + + if ( type == wxBITMAP_TYPE_BMP_RESOURCE ) + { + hBitmap.Init( ::LoadBitmap(wxGetInstance(), name.t_str()) ); + + if ( !hBitmap ) + { + wxLogError(_("Failed to load bitmap \"%s\" from resources."), name); + } + } + else if ( type == wxBITMAP_TYPE_ICO_RESOURCE ) + { + const HICON hIcon = ::LoadIcon(wxGetInstance(), name.t_str()); + + if ( !hIcon ) + { + wxLogError(_("Failed to load icon \"%s\" from resources."), name); + } + else + { + ICONINFO info; + if ( !::GetIconInfo(hIcon, &info) ) + { + wxLogLastError(wxT("GetIconInfo")); + return wxImage(); + } + + hBitmap.Init(info.hbmColor); + hMask.Init(info.hbmMask); + } + } + else if ( type == wxBITMAP_TYPE_CUR_RESOURCE ) + { + wxLogDebug(wxS("Loading cursors from resources is not implemented.")); + } + else + { + wxFAIL_MSG(wxS("Invalid bitmap resource type.")); + } + + if ( !hBitmap ) + return wxImage(); + + wxImage image = wxDIB(hBitmap).ConvertToImage(); + if ( hMask ) + { + const wxImage mask = wxDIB(hMask).ConvertToImage(); + image.SetMaskFromImage(mask, 255, 255, 255); + } + else + { + // Light gray colour is a default mask + image.SetMaskColour(0xc0, 0xc0, 0xc0); + } + + // We could have already loaded alpha from the resources, but if not, + // initialize it now using the mask. + if ( !image.HasAlpha() ) + image.InitAlpha(); + + return image; +} + +#endif // HAS_LOAD_FROM_RESOURCE + +bool wxImage::LoadFile( const wxString& filename, + wxBitmapType type, int WXUNUSED_UNLESS_STREAMS(index) ) { +#ifdef HAS_LOAD_FROM_RESOURCE + if ( type == wxBITMAP_TYPE_BMP_RESOURCE + || type == wxBITMAP_TYPE_ICO_RESOURCE + || type == wxBITMAP_TYPE_CUR_RESOURCE) + { + const wxImage image = ::LoadImageFromResource(filename, type); + if ( image.IsOk() ) + { + *this = image; + return true; + } + } +#endif // HAS_LOAD_FROM_RESOURCE + #if HAS_FILE_STREAMS wxImageFileInputStream stream(filename); if ( stream.IsOk() ) @@ -2576,6 +2764,7 @@ bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const if ( !handler ) { wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); + return false; } return DoSave(*handler, stream); @@ -2784,10 +2973,6 @@ wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb) case BLUE: hue = 4.0 + (red - green) / deltaRGB; break; - - default: - wxFAIL_MSG(wxT("hue not specified")); - break; } hue /= 6.0;