#include <gdk/gdkrgb.h>
#endif
+wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue )
+{
+ wxBitmap bitmap;
+
+ wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") );
+
+ int width = GetWidth();
+ int height = GetHeight();
+
+ bitmap.SetHeight( height );
+ bitmap.SetWidth( width );
+
+ bitmap.SetBitmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ) );
+
+ bitmap.SetDepth( 1 );
+
+ // Create picture image
+
+ unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
+
+ GdkImage *data_image =
+ gdk_image_new_bitmap( gdk_visual_get_system(), data_data, width, height );
+
+ // Create mask image
+
+ GdkImage *mask_image = (GdkImage*) NULL;
+
+ if (HasMask())
+ {
+ unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
+
+ mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
+
+ wxMask *mask = new wxMask();
+ mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
+
+ bitmap.SetMask( mask );
+ }
+
+ int r_mask = GetMaskRed();
+ int g_mask = GetMaskGreen();
+ int b_mask = GetMaskBlue();
+
+ unsigned char* data = GetData();
+
+ int index = 0;
+ for (int y = 0; y < height; y++)
+ {
+ for (int x = 0; x < width; x++)
+ {
+ int r = data[index];
+ index++;
+ int g = data[index];
+ index++;
+ int b = data[index];
+ index++;
+
+ if (HasMask())
+ {
+ if ((r == r_mask) && (b == b_mask) && (g == g_mask))
+ gdk_image_put_pixel( mask_image, x, y, 1 );
+ else
+ gdk_image_put_pixel( mask_image, x, y, 0 );
+ }
+
+ if ((r == red) && (b == blue) && (g == green))
+ gdk_image_put_pixel( data_image, x, y, 1 );
+ else
+ gdk_image_put_pixel( data_image, x, y, 0 );
+
+ } // for
+ } // for
+
+ // Blit picture
+
+ GdkGC *data_gc = gdk_gc_new( bitmap.GetBitmap() );
+
+ gdk_draw_image( bitmap.GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
+
+ gdk_image_destroy( data_image );
+ gdk_gc_unref( data_gc );
+
+ // Blit mask
+
+ if (HasMask())
+ {
+ GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
+
+ gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
+
+ gdk_image_destroy( mask_image );
+ gdk_gc_unref( mask_gc );
+ }
+
+ return bitmap;
+}
+
+
wxBitmap wxImage::ConvertToBitmap() const
{
wxBitmap bitmap;
gdk_image_put_pixel( mask_image, x, y, 0 );
}
- if (HasMask())
- {
- if ((r == r_mask) && (b == b_mask) && (g == g_mask))
- gdk_image_put_pixel( mask_image, x, y, 1 );
- else
- gdk_image_put_pixel( mask_image, x, y, 0 );
- }
-
switch (bpp)
{
case 8:
#include "wx/utils.h"
#include <math.h>
+/*
+
+Date: Wed, 05 Jan 2000 11:45:40 +0100
+From: Frits Boel <boel@niob.knaw.nl>
+To: julian.smart@ukonline.co.uk
+Subject: Patch for Motif ConvertToBitmap
+
+Hi Julian,
+
+I've been working on a wxWin application for image processing. From the
+beginning, I was surprised by the (lack of) speed of ConvertToBitmap,
+till I looked in the source code of image.cpp. I saw that converting a
+wxImage to a bitmap with 8-bit pixels is done with comparing every pixel
+to the 256 colors of the palet. A very time-consuming piece of code!
+
+Because I wanted a faster application, I've made a 'patch' for this. In
+short: every pixel of the image is compared to a sorted list with
+colors. If the color is found in the list, the palette entry is
+returned; if the color is not found, the color palette is searched and
+then the palette entry is returned and the color added to the sorted
+list.
+
+Maybe there is another method for this, namely changing the palette
+itself (if the colors are known, as is the case with tiffs with a
+colormap). I did not look at this, maybe someone else did?
+
+The code of the patch is attached, have a look on it, and maybe you will
+ship it with the next release of wxMotif?
+
+Regards,
+
+Frits Boel
+Software engineer at Hubrecht Laboratory, The Netherlands.
+
+*/
+
+class wxSearchColor
+{
+public:
+ wxSearchColor( void );
+ wxSearchColor( int size, XColor *colors );
+ ~wxSearchColor( void );
+
+ int SearchColor( int r, int g, int b );
+private:
+ int AddColor( unsigned int value, int pos );
+
+ int size;
+ XColor *colors;
+ unsigned int *color;
+ int *entry;
+
+ int bottom;
+ int top;
+};
+
+wxSearchColor::wxSearchColor( void )
+{
+ this->size = 0;
+ this->colors = (XColor*) NULL;
+ this->color = (unsigned int *) NULL;
+ this->entry = (int*) NULL;
+
+ this->bottom = 0;
+ this->top = 0;
+}
+
+wxSearchColor::wxSearchColor( int size, XColor *colors )
+{
+ int i;
+ this->size = size;
+ this->colors = colors;
+ this->color = new unsigned int[size];
+ this->entry = new int [size];
+
+ for (i = 0; i < this->size; i++ ) {
+ this->entry[i] = -1;
+ }
+
+ this->bottom = this->top = ( size >> 1 );
+}
+
+wxSearchColor::~wxSearchColor( void )
+{
+ if ( this->color ) delete this->color;
+ if ( this->entry ) delete this->entry;
+}
+
+int wxSearchColor::SearchColor( int r, int g, int b )
+{
+ unsigned int value = ( ( ( r * 256 ) + g ) * 256 ) + b;
+ int begin = this->bottom;
+ int end = this->top;
+ int middle;
+
+ while ( begin <= end ) {
+
+ middle = ( begin + end ) >> 1;
+
+ if ( value == this->color[middle] ) {
+ return( this->entry[middle] );
+ } else if ( value < this->color[middle] ) {
+ end = middle - 1;
+ } else {
+ begin = middle + 1;
+ }
+
+ }
+
+ return AddColor( value, middle );
+}
+
+int wxSearchColor::AddColor( unsigned int value, int pos )
+{
+ int i;
+ int pixel = -1;
+ int max = 3 * (65536);
+ for ( i = 0; i < 256; i++ ) {
+ int rdiff = ((value >> 8) & 0xFF00 ) - colors[i].red;
+ int gdiff = ((value ) & 0xFF00 ) - colors[i].green;
+ int bdiff = ((value << 8) & 0xFF00 ) - colors[i].blue;
+ int sum = abs (rdiff) + abs (gdiff) + abs (bdiff);
+ if (sum < max) { pixel = i; max = sum; }
+ }
+
+ if ( this->entry[pos] < 0 ) {
+ this->color[pos] = value;
+ this->entry[pos] = pixel;
+ } else if ( value < this->color[pos] ) {
+
+ if ( this->bottom > 0 ) {
+ for ( i = this->bottom; i < pos; i++ ) {
+ this->color[i-1] = this->color[i];
+ this->entry[i-1] = this->entry[i];
+ }
+ this->bottom--;
+ this->color[pos-1] = value;
+ this->entry[pos-1] = pixel;
+ } else if ( this->top < this->size-1 ) {
+ for ( i = this->top; i >= pos; i-- ) {
+ this->color[i+1] = this->color[i];
+ this->entry[i+1] = this->entry[i];
+ }
+ this->top++;
+ this->color[pos] = value;
+ this->entry[pos] = pixel;
+ }
+
+ } else {
+
+ if ( this->top < this->size-1 ) {
+ for ( i = this->top; i > pos; i-- ) {
+ this->color[i+1] = this->color[i];
+ this->entry[i+1] = this->entry[i];
+ }
+ this->top++;
+ this->color[pos+1] = value;
+ this->entry[pos+1] = pixel;
+ } else if ( this->bottom > 0 ) {
+ for ( i = this->bottom; i < pos; i++ ) {
+ this->color[i-1] = this->color[i];
+ this->entry[i-1] = this->entry[i];
+ }
+ this->bottom--;
+ this->color[pos] = value;
+ this->entry[pos] = pixel;
+ }
+
+ }
+
+ return( pixel );
+}
+
wxBitmap wxImage::ConvertToBitmap() const
{
wxBitmap bitmap;
XQueryColors( dpy, cmap, colors, 256 );
}
+ wxSearchColor scolor( 256, colors );
unsigned char* data = GetData();
int index = 0;
{
case 8:
{
+#if 0 // Old, slower code
int pixel = -1;
/*
if (wxTheApp->m_colorCube)
/*
}
*/
+#endif
+
+ // And this is all to get the 'right' color...
+ int pixel = scolor.SearchColor( r, g, b );
XPutPixel( data_image, x, y, pixel );
break;
}
projects / wxWidgets.git / blobdiff