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Fix typos, separate local variables of image scaling algorithms.

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11869 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Albrecht Schlosser 2016-08-09 15:20:54 +00:00
parent 78d853891c
commit e7b9e77ba5
3 changed files with 20 additions and 19 deletions
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2
src/Fl_Bitmap.cxx
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@ -189,7 +189,7 @@ Fl_Image *Fl_Bitmap::copy(int W, int H) {
xstep, ystep; // X & Y step increments
// Figure out Bresenheim step/modulus values...
// Figure out Bresenham step/modulus values...
xmod = w() % W;
xstep = w() / W;
ymod = h() % H;

33
src/Fl_Image.cxx
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@ -63,7 +63,6 @@ void Fl_Image::draw(int XP, int YP, int, int, int, int) {
draw_empty(XP, YP);
}
/**
The protected method draw_empty() draws a box with
an X in it. It can be used to draw any image that lacks image
@ -324,31 +323,33 @@ Fl_Image *Fl_RGB_Image::copy(int W, int H) {
}
if (W <= 0 || H <= 0) return 0;
// OK, need to resize the image data; allocate memory and
// OK, need to resize the image data; allocate memory and create new image
uchar *new_ptr; // Pointer into new array
const uchar *old_ptr; // Pointer into old array
int c, // Channel number
sy, // Source coordinate
dx, dy, // Destination coordinates
xerr, yerr, // X & Y errors
xmod, ymod, // X & Y moduli
xstep, ystep, // X & Y step increments
int dx, dy, // Destination coordinates
line_d; // stride from line to line
// Figure out Bresenheim step/modulus values...
xmod = w() % W;
xstep = (w() / W) * d();
ymod = h() % H;
ystep = h() / H;
line_d = ld() ? ld() : w() * d();
// Allocate memory for the new image...
new_array = new uchar [W * H * d()];
new_image = new Fl_RGB_Image(new_array, W, H, d());
new_image->alloc_array = 1;
line_d = ld() ? ld() : w() * d();
if (Fl_Image::RGB_scaling() == FL_RGB_SCALING_NEAREST) {
int c, // Channel number
sy, // Source coordinate
xerr, yerr, // X & Y errors
xmod, ymod, // X & Y moduli
xstep, ystep; // X & Y step increments
// Figure out Bresenham step/modulus values...
xmod = w() % W;
xstep = (w() / W) * d();
ymod = h() % H;
ystep = h() / H;
// Scale the image using a nearest-neighbor algorithm...
for (dy = H, sy = 0, yerr = H, new_ptr = new_array; dy > 0; dy --) {
for (dx = W, xerr = W, old_ptr = array + sy * line_d; dx > 0; dx --) {

2
src/Fl_Pixmap.cxx
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@ -204,7 +204,7 @@ Fl_Image *Fl_Pixmap::copy(int W, int H) {
sprintf(new_info, "%d %d %d %d", W, H, ncolors, chars_per_pixel);
// Figure out Bresenheim step/modulus values...
// Figure out Bresenham step/modulus values...
xmod = w() % W;
xstep = (w() / W) * chars_per_pixel;
ymod = h() % H;