X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/89a1395ebc336eb41780578ccde676520b5811d6..c81394808bf7efd84e4294e44a9a9a7b7f6dd8a9:/src/common/image.cpp?ds=sidebyside diff --git a/src/common/image.cpp b/src/common/image.cpp index 050ec43488..de87a34257 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -442,23 +442,16 @@ wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const if ( old_width == width && old_height == height ) return *this; - // resample the image using either the nearest neighbourhood, bilinear or - // bicubic method as specified - switch ( quality ) + if (quality == wxIMAGE_QUALITY_HIGH) { - 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; + quality = (width < old_width && height < old_height) + ? wxIMAGE_QUALITY_BOX_AVERAGE + : wxIMAGE_QUALITY_BICUBIC; + } + // Resample the image using the method as specified. + switch ( quality ) + { case wxIMAGE_QUALITY_NEAREST: if ( old_width % width == 0 && old_width >= width && old_height % height == 0 && old_height >= height ) @@ -468,6 +461,18 @@ wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const image = ResampleNearest(width, height); break; + + case wxIMAGE_QUALITY_BILINEAR: + image = ResampleBilinear(width, height); + break; + + case wxIMAGE_QUALITY_BICUBIC: + image = ResampleBicubic(width, height); + break; + + case wxIMAGE_QUALITY_BOX_AVERAGE: + image = ResampleBox(width, height); + break; } // If the original image has a mask, apply the mask to the new image @@ -589,16 +594,16 @@ wxImage wxImage::ResampleBox(int width, int height) const 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); - j <= int(src_y + scale_factor_y_2); + 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++ ) { // 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); - i <= src_x + scale_factor_x_2; + 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++ ) { // Don't average edge pixels @@ -1089,24 +1094,37 @@ wxImage wxImage::Rotate90( bool clockwise ) const } unsigned char *data = image.GetData(); - const unsigned char *source_data = M_IMGDATA->m_data; unsigned char *target_data; - for (long j = 0; j < height; j++) + // we rotate the image in 21-pixel (63-byte) wide strips + // to make better use of cpu cache - memory transfers + // (note: while much better than single-pixel "strips", + // our vertical strips will still generally straddle 64-byte cachelines) + for (long ii = 0; ii < width; ) { - for (long i = 0; i < width; i++) + long next_ii = wxMin(ii + 21, width); + + for (long j = 0; j < height; j++) { - if ( clockwise ) - { - target_data = data + (((i+1)*height) - j - 1)*3; - } - else + const unsigned char *source_data + = M_IMGDATA->m_data + (j*width + ii)*3; + + for (long i = ii; i < next_ii; i++) { - target_data = data + ((height*(width-1)) + j - (i*height))*3; + if ( clockwise ) + { + target_data = data + ((i + 1)*height - j - 1)*3; + } + else + { + target_data = data + (height*(width - 1 - i) + j)*3; + } + memcpy( target_data, source_data, 3 ); + source_data += 3; } - memcpy( target_data, source_data, 3 ); - source_data += 3; } + + ii = next_ii; } const unsigned char *source_alpha = M_IMGDATA->m_alpha; @@ -1116,21 +1134,30 @@ wxImage wxImage::Rotate90( bool clockwise ) const unsigned char *alpha_data = image.GetAlpha(); unsigned char *target_alpha = 0 ; - for (long j = 0; j < height; j++) + for (long ii = 0; ii < width; ) { - for (long i = 0; i < width; i++) + long next_ii = wxMin(ii + 64, width); + + for (long j = 0; j < height; j++) { - if ( clockwise ) - { - target_alpha = alpha_data + (((i+1)*height) - j - 1); - } - else + source_alpha = M_IMGDATA->m_alpha + j*width + ii; + + for (long i = ii; i < next_ii; i++) { - target_alpha = alpha_data + ((height*(width-1)) + j - (i*height)); - } + if ( clockwise ) + { + target_alpha = alpha_data + (i+1)*height - j - 1; + } + else + { + target_alpha = alpha_data + height*(width - i - 1) + j; + } - *target_alpha = *source_alpha++; + *target_alpha = *source_alpha++; + } } + + ii = next_ii; } } @@ -1401,12 +1428,15 @@ void wxImage::Paste( const wxImage &image, int x, int y ) if (width < 1) return; if (height < 1) return; - if ((!HasMask() && !image.HasMask()) || - (HasMask() && !image.HasMask()) || - ((HasMask() && image.HasMask() && + // If we can, copy the data using memcpy() as this is the fastest way. But + // for this the image being pasted must have "compatible" mask with this + // one meaning that either it must not have one at all or it must use the + // same masked colour. + if ( !image.HasMask() || + ((HasMask() && (GetMaskRed()==image.GetMaskRed()) && (GetMaskGreen()==image.GetMaskGreen()) && - (GetMaskBlue()==image.GetMaskBlue())))) + (GetMaskBlue()==image.GetMaskBlue()))) ) { const unsigned char* source_data = image.GetData() + 3*(xx + yy*image.GetWidth()); int source_step = image.GetWidth()*3;