#include "wx/module.h"
#include "wx/palette.h"
#include "wx/intl.h"
+ #include "wx/colour.h"
#endif
-#include "wx/filefn.h"
#include "wx/wfstream.h"
#include "wx/xpmdecod.h"
return refData_new;
}
+// returns a new image with the same dimensions, alpha, and mask as *this
+// if on_its_side is true, width and height are swapped
+wxImage wxImage::MakeEmptyClone(int flags) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxS("invalid image") );
+
+ long height = M_IMGDATA->m_height;
+ long width = M_IMGDATA->m_width;
+
+ if ( flags & Clone_SwapOrientation )
+ wxSwap( width, height );
+
+ if ( !image.Create( width, height, false ) )
+ {
+ wxFAIL_MSG( wxS("unable to create image") );
+ return image;
+ }
+
+ if ( M_IMGDATA->m_alpha )
+ {
+ image.SetAlpha();
+ wxCHECK2_MSG( image.GetAlpha(), return wxImage(),
+ wxS("unable to create alpha channel") );
+ }
+
+ if ( M_IMGDATA->m_hasMask )
+ {
+ image.SetMaskColour( M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue );
+ }
+
+ return image;
+}
+
wxImage wxImage::Copy() const
{
wxImage image;
bool hasMask = false ;
unsigned char maskRed = 0;
unsigned char maskGreen = 0;
- unsigned char maskBlue =0 ;
+ unsigned char maskBlue = 0 ;
- unsigned char *source_data = M_IMGDATA->m_data;
+ const unsigned char *source_data = M_IMGDATA->m_data;
unsigned char *target_data = data;
- unsigned char *source_alpha = 0 ;
+ const unsigned char *source_alpha = 0 ;
unsigned char *target_alpha = 0 ;
if (M_IMGDATA->m_hasMask)
{
long y_offset = (y * yFactor + y1) * old_width;
for ( int x1 = 0 ; x1 < xFactor ; ++x1 )
{
- unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ;
+ const unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ;
unsigned char red = pixel[0] ;
unsigned char green = pixel[1] ;
unsigned char blue = pixel[2] ;
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 )
+ 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);
- }
+ quality = (width < old_width && height < old_height)
+ ? wxIMAGE_QUALITY_BOX_AVERAGE
+ : wxIMAGE_QUALITY_BICUBIC;
}
- 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 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 )
{
- 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;
+ image = ResampleNearest(width, height);
+ break;
- 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 ;
+ case wxIMAGE_QUALITY_BILINEAR:
+ image = ResampleBilinear(width, height);
+ break;
- 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;
- }
+ case wxIMAGE_QUALITY_BICUBIC:
+ image = ResampleBicubic(width, height);
+ break;
- y += y_delta;
- }
+ case wxIMAGE_QUALITY_BOX_AVERAGE:
+ image = ResampleBox(width, height);
+ break;
}
// If the original image has a mask, apply the mask to the new image
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") );
+
+ const unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
+ const 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++ )
+ {
+ const unsigned char* src_line = &source_data[(y>>16)*old_width*3];
+ const unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
+
+ long x = 0;
+ for ( long i = 0; i < width; i++ )
+ {
+ const unsigned char* src_pixel = &src_line[(x>>16)*3];
+ const 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);
- unsigned char* src_data = M_IMGDATA->m_data;
- unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ const unsigned char* src_data = M_IMGDATA->m_data;
+ const 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 = 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
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);
+ const unsigned char* src_data = M_IMGDATA->m_data;
+ const 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)
ret_image.Create(width, height, false);
- unsigned char* src_data = M_IMGDATA->m_data;
- unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ const unsigned char* src_data = M_IMGDATA->m_data;
+ const unsigned char* src_alpha = M_IMGDATA->m_alpha;
unsigned char* dst_data = ret_image.GetData();
unsigned char* dst_alpha = NULL;
// Blur in the horizontal direction
wxImage wxImage::BlurHorizontal(int blurRadius) const
{
- wxImage ret_image;
- ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
+ wxImage ret_image(MakeEmptyClone());
- unsigned char* src_data = M_IMGDATA->m_data;
- unsigned char* dst_data = ret_image.GetData();
- unsigned char* src_alpha = M_IMGDATA->m_alpha;
- unsigned char* dst_alpha = NULL;
+ wxCHECK( ret_image.Ok(), ret_image );
- // Check for a mask or alpha
- 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);
- }
+ const unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* dst_data = ret_image.GetData();
+ const unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ unsigned char* 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) const
{
- wxImage ret_image;
- ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
+ wxImage ret_image(MakeEmptyClone());
- unsigned char* src_data = M_IMGDATA->m_data;
- unsigned char* dst_data = ret_image.GetData();
- unsigned char* src_alpha = M_IMGDATA->m_alpha;
- unsigned char* dst_alpha = NULL;
+ wxCHECK( ret_image.Ok(), ret_image );
- // Check for a mask or alpha
- 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);
- }
+ const unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* dst_data = ret_image.GetData();
+ const unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ unsigned char* dst_alpha = ret_image.GetAlpha();
// number of pixels we average over
const int blurArea = blurRadius*2 + 1;
wxImage wxImage::Rotate90( bool clockwise ) const
{
- wxImage image;
+ wxImage image(MakeEmptyClone(Clone_SwapOrientation));
- wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+ wxCHECK( image.Ok(), image );
- image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false );
+ long height = M_IMGDATA->m_height;
+ long width = M_IMGDATA->m_width;
- unsigned char *data = image.GetData();
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+ {
+ int hot_x = GetOptionInt( wxIMAGE_OPTION_CUR_HOTSPOT_X );
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+ clockwise ? hot_x : width - 1 - hot_x);
+ }
- wxCHECK_MSG( data, image, wxT("unable to create image") );
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+ {
+ int hot_y = GetOptionInt( wxIMAGE_OPTION_CUR_HOTSPOT_Y );
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+ clockwise ? height - 1 - hot_y : hot_y);
+ }
- unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *data = image.GetData();
unsigned char *target_data;
- unsigned char *alpha_data = 0 ;
- unsigned char *source_alpha = 0 ;
- unsigned char *target_alpha = 0 ;
- if (M_IMGDATA->m_hasMask)
+ // 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; )
{
- image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+ long next_ii = wxMin(ii + 21, width);
+
+ for (long j = 0; j < height; j++)
+ {
+ const unsigned char *source_data
+ = M_IMGDATA->m_data + (j*width + ii)*3;
+
+ for (long i = ii; i < next_ii; i++)
+ {
+ 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;
+ }
+ }
+
+ ii = next_ii;
}
- else
+
+ const unsigned char *source_alpha = M_IMGDATA->m_alpha;
+
+ if ( source_alpha )
{
- source_alpha = M_IMGDATA->m_alpha ;
- if ( source_alpha )
+ unsigned char *alpha_data = image.GetAlpha();
+ unsigned char *target_alpha = 0 ;
+
+ for (long ii = 0; ii < width; )
{
- image.SetAlpha() ;
- alpha_data = image.GetAlpha() ;
+ long next_ii = wxMin(ii + 64, width);
+
+ for (long j = 0; j < height; j++)
+ {
+ source_alpha = M_IMGDATA->m_alpha + j*width + ii;
+
+ for (long i = ii; i < next_ii; i++)
+ {
+ 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++;
+ }
+ }
+
+ ii = next_ii;
}
}
+ return image;
+}
+
+wxImage wxImage::Rotate180() const
+{
+ wxImage image(MakeEmptyClone());
+
+ wxCHECK( image.Ok(), image );
+
long height = M_IMGDATA->m_height;
long width = M_IMGDATA->m_width;
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+ {
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+ width - 1 - GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X));
+ }
+
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+ {
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+ height - 1 - GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y));
+ }
+
+ unsigned char *data = image.GetData();
+ unsigned char *alpha = image.GetAlpha();
+ const unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data + width * height * 3;
+
for (long j = 0; j < height; j++)
{
for (long i = 0; i < width; i++)
{
- if (clockwise)
- {
- target_data = data + (((i+1)*height) - j - 1)*3;
- if(source_alpha)
- target_alpha = alpha_data + (((i+1)*height) - j - 1);
- }
- else
- {
- target_data = data + ((height*(width-1)) + j - (i*height))*3;
- if(source_alpha)
- target_alpha = alpha_data + ((height*(width-1)) + j - (i*height));
- }
+ target_data -= 3;
memcpy( target_data, source_data, 3 );
source_data += 3;
+ }
+ }
+
+ if ( alpha )
+ {
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ unsigned char *dest_alpha = alpha + width * height;
- if(source_alpha)
+ for (long j = 0; j < height; ++j)
+ {
+ for (long i = 0; i < width; ++i)
{
- memcpy( target_alpha, source_alpha, 1 );
- source_alpha += 1;
+ *(--dest_alpha) = *(src_alpha++);
}
}
}
wxImage wxImage::Mirror( bool horizontally ) const
{
- wxImage image;
-
- wxCHECK_MSG( Ok(), image, wxT("invalid image") );
-
- image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
-
- unsigned char *data = image.GetData();
- unsigned char *alpha = NULL;
-
- wxCHECK_MSG( data, image, wxT("unable to create image") );
+ wxImage image(MakeEmptyClone());
- if (M_IMGDATA->m_alpha != NULL) {
- image.SetAlpha();
- alpha = image.GetAlpha();
- wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") );
- }
-
- if (M_IMGDATA->m_hasMask)
- image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+ wxCHECK( image.Ok(), image );
long height = M_IMGDATA->m_height;
long width = M_IMGDATA->m_width;
- unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *data = image.GetData();
+ unsigned char *alpha = image.GetAlpha();
+ const unsigned char *source_data = M_IMGDATA->m_data;
unsigned char *target_data;
if (horizontally)
source_data += 3*width;
}
- if (alpha != NULL)
+ if ( alpha )
{
// src_alpha starts at the first pixel and increases by 1 width after each step
// (a step here is the copy of the alpha channel of an entire line)
wxCHECK_MSG( subdata, image, wxT("unable to create image") );
- if (src_alpha != NULL) {
+ if ( src_alpha ) {
image.SetAlpha();
subalpha = image.GetAlpha();
wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel"));
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;
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()))) )
{
- unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+ const unsigned char* source_data = image.GetData() + 3*(xx + yy*image.GetWidth());
int source_step = image.GetWidth()*3;
- unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+ unsigned char* target_data = GetData() + 3*((x+xx) + (y+yy)*M_IMGDATA->m_width);
int target_step = M_IMGDATA->m_width*3;
for (int j = 0; j < height; j++)
{
if ( !HasAlpha() )
InitAlpha();
- unsigned char* source_data = image.GetAlpha() + xx + yy*image.GetWidth();
+ const 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;
unsigned char g = image.GetMaskGreen();
unsigned char b = image.GetMaskBlue();
- unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+ const unsigned char* source_data = image.GetData() + 3*(xx + yy*image.GetWidth());
int source_step = image.GetWidth()*3;
- unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+ unsigned char* target_data = GetData() + 3*((x+xx) + (y+yy)*M_IMGDATA->m_width);
int target_step = M_IMGDATA->m_width*3;
for (int j = 0; j < height; j++)
}
}
-wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const
+wxImage wxImage::ConvertToGreyscale(void) const
{
- wxImage image;
+ return ConvertToGreyscale(0.299, 0.587, 0.114);
+}
- wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+wxImage wxImage::ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const
+{
+ wxImage image(MakeEmptyClone());
- image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
+ wxCHECK( image.Ok(), image );
+ const unsigned char *src = M_IMGDATA->m_data;
unsigned char *dest = image.GetData();
- wxCHECK_MSG( dest, image, wxT("unable to create image") );
-
- unsigned char *src = M_IMGDATA->m_data;
- bool hasMask = M_IMGDATA->m_hasMask;
- unsigned char maskRed = M_IMGDATA->m_maskRed;
- unsigned char maskGreen = M_IMGDATA->m_maskGreen;
- unsigned char maskBlue = M_IMGDATA->m_maskBlue;
-
- if ( hasMask )
- image.SetMaskColour(maskRed, maskGreen, maskBlue);
+ const bool hasMask = M_IMGDATA->m_hasMask;
+ const unsigned char maskRed = M_IMGDATA->m_maskRed;
+ const unsigned char maskGreen = M_IMGDATA->m_maskGreen;
+ const unsigned char maskBlue = M_IMGDATA->m_maskBlue;
const long size = M_IMGDATA->m_width * M_IMGDATA->m_height;
for ( long i = 0; i < size; i++, src += 3, dest += 3 )
{
- // don't modify the mask
- if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue )
+ memcpy(dest, src, 3);
+ // only modify non-masked pixels
+ 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] = static_cast<unsigned char>(luma);
+ wxColour::MakeGrey(dest + 0, dest + 1, dest + 2, weight_r, weight_g, weight_b);
}
}
// copy the alpha channel, if any
- if (HasAlpha())
+ if ( image.HasAlpha() )
{
- const size_t alphaSize = GetWidth() * GetHeight();
- unsigned char *alpha = (unsigned char*)malloc(alphaSize);
- memcpy(alpha, GetAlpha(), alphaSize);
- image.InitAlpha();
- image.SetAlpha(alpha);
+ memcpy( image.GetAlpha(), GetAlpha(), GetWidth() * GetHeight() );
}
return image;
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") );
}
}
+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;
+ return false;
unsigned char mr, mg, mb;
if ( !FindFirstUnusedColour(&mr, &mg, &mb) )
return false;
}
- ConvertAlphaToMask(mr, mg, mb, threshold);
- return true;
+ return ConvertAlphaToMask(mr, mg, mb, threshold);
}
-void wxImage::ConvertAlphaToMask(unsigned char mr,
+bool wxImage::ConvertAlphaToMask(unsigned char mr,
unsigned char mg,
unsigned char mb,
unsigned char threshold)
{
if ( !HasAlpha() )
- return;
+ return false;
AllocExclusive();
M_IMGDATA->m_alpha = NULL;
M_IMGDATA->m_staticAlpha = false;
+
+ return true;
}
// ----------------------------------------------------------------------------
int WXUNUSED_UNLESS_STREAMS(index) )
{
#if HAS_FILE_STREAMS
- if (wxFileExists(filename))
+ wxImageFileInputStream stream(filename);
+ if ( stream.IsOk() )
{
- wxImageFileInputStream stream(filename);
wxBufferedInputStream bstream( stream );
- return LoadFile(bstream, type, index);
+ if ( LoadFile(bstream, type, index) )
+ return true;
}
- else
- {
- wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
- return false;
- }
-#else // !HAS_FILE_STREAMS
- return false;
+ wxLogError(_("Failed to load image from file \"%s\"."), filename);
#endif // HAS_FILE_STREAMS
+
+ return false;
}
bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
int WXUNUSED_UNLESS_STREAMS(index) )
{
#if HAS_FILE_STREAMS
- if (wxFileExists(filename))
+ wxImageFileInputStream stream(filename);
+ if ( stream.IsOk() )
{
- wxImageFileInputStream stream(filename);
wxBufferedInputStream bstream( stream );
- return LoadFile(bstream, mimetype, index);
+ if ( LoadFile(bstream, mimetype, index) )
+ return true;
}
- else
- {
- wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
- return false;
- }
-#else // !HAS_FILE_STREAMS
- return false;
+ wxLogError(_("Failed to load image from file \"%s\"."), filename);
#endif // HAS_FILE_STREAMS
+
+ return false;
}
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;
}
}
const unsigned maxWidth = GetOptionInt(wxIMAGE_OPTION_MAX_WIDTH),
maxHeight = GetOptionInt(wxIMAGE_OPTION_MAX_HEIGHT);
+ // Preserve the original stream position if possible to rewind back to it
+ // if we failed to load the file -- maybe the next handler that we try can
+ // succeed after us then.
+ wxFileOffset posOld = wxInvalidOffset;
+ if ( stream.IsSeekable() )
+ posOld = stream.TellI();
+
if ( !handler.LoadFile(this, stream, true/*verbose*/, index) )
- return false;
+ {
+ if ( posOld != wxInvalidOffset )
+ stream.SeekI(posOld);
- M_IMGDATA->m_type = handler.GetType();
+ return false;
+ }
// rescale the image to the specified size if needed
if ( maxWidth || maxHeight )
Rescale(width, height, wxIMAGE_QUALITY_HIGH);
}
+ // Set this after Rescale, which currently does not preserve it
+ M_IMGDATA->m_type = handler.GetType();
+
return true;
}
if ( type == wxBITMAP_TYPE_ANY )
{
+ if ( !stream.IsSeekable() )
+ {
+ // The error message about image data format being unknown below
+ // would be misleading in this case as we are not even going to try
+ // any handlers because CanRead() never does anything for not
+ // seekable stream, so try to be more precise here.
+ wxLogError(_("Can't automatically determine the image format "
+ "for non-seekable input."));
+ return false;
+ }
+
const wxList& list = GetHandlers();
for ( wxList::compatibility_iterator node = list.GetFirst();
node;
return true;
}
- wxLogWarning( _("No handler found for image type.") );
+ wxLogWarning( _("Unknown image data format.") );
return false;
}
handler = FindHandler(type);
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) )
{
- wxLogError(_("Image file is not of type %ld."), type);
+ wxLogError(_("This is not a %s."), handler->GetName());
return false;
}
if ( stream.IsSeekable() && !handler->CanRead(stream) )
{
- wxLogError(_("Image file is not of type %s."), mimetype);
+ wxLogError(_("Image is not of type %s."), mimetype);
return false;
}
bool wxImageHandler::CanRead( const wxString& name )
{
- if (wxFileExists(name))
+ wxImageFileInputStream stream(name);
+ if ( !stream.IsOk() )
{
- wxImageFileInputStream stream(name);
- return CanRead(stream);
- }
+ wxLogError(_("Failed to check format of image file \"%s\"."), name);
- wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
+ return false;
+ }
- return false;
+ return CanRead(stream);
}
bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
{
// NOTE: this code is the same of wxAnimationDecoder::CanRead and
// wxImageHandler::GetImageCount
-
+
if ( !stream.IsSeekable() )
return false; // can't test unseekable stream
projects / wxWidgets.git / blobdiff