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New image functions:

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* invert
 * flip_horizontal
 * flip_vertical
 * rotate

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1472 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2010-08-03 14:56:45 +00:00
parent 726bd9c135
commit ca0e762b64
20 changed files with 286 additions and 20 deletions
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src/gfx/rotate_image.cpp
+50 -16
View File
@@ -83,24 +83,58 @@ struct Rotate270 {
// ----------------------------------------------------------------------------- : Interface
Image rotate_image(const Image& image, int angle) {
switch (angle % 360) {
case 0: return image;
case 90: return rotate_image_impl<Rotate90> (image);
case 180: return rotate_image_impl<Rotate180>(image);
case 270: return rotate_image_impl<Rotate270>(image);
default:
if (!image.HasAlpha()) const_cast<Image&>(image).InitAlpha();
return image.Rotate(angle * M_PI / 180, wxPoint(0,0));
double almost_equal(double x, double y) {
return fabs(x-y) < 1e-6;
}
Image rotate_image(const Image& image, double angle) {
double a = fmod(angle, 360);
if (almost_equal(a, 0)) return image;
if (almost_equal(a, 90)) return rotate_image_impl<Rotate90> (image);
if (almost_equal(a,180)) return rotate_image_impl<Rotate180>(image);
if (almost_equal(a,270)) return rotate_image_impl<Rotate270>(image);
else {
if (!image.HasAlpha()) const_cast<Image&>(image).InitAlpha();
return image.Rotate(angle * M_PI / 180, wxPoint(0,0));
}
}
/*Bitmap rotate_bitmap(const Bitmap& bitmap, int angle) {
switch (angle % 360) {
case 90:
case 180:
case 270:
default: return bitmap;
// ----------------------------------------------------------------------------- : Flipping images
// reverse a list of n chunks of size 'step'
void do_flip(Byte const* in, Byte* out, int step, int n) {
for (int i = 0, j = n-1 ; i < n ; ++i, --j) {
memcpy(&out[i*step], &in[j*step], step);
}
}
*/
void do_flip(Byte const* in, Byte* out, int step1, int n1, int n2) {
int step2 = step1 * n1;
for (int i = 0 ; i < n2 ; ++i) {
do_flip(in,out,step1,n1);
in += step2;
out += step2;
}
}
Image flip_image_horizontal(Image const& img) {
int w = img.GetWidth(), h= img.GetHeight();
Image out(w,h,false);
do_flip(img.GetData(), out.GetData(), 3, w, h);
if (img.HasAlpha()) {
out.InitAlpha();
do_flip(img.GetAlpha(), out.GetAlpha(), 1, w, h);
}
return out;
}
Image flip_image_vertical(Image const& img) {
int w = img.GetWidth(), h= img.GetHeight();
Image out(w,h,false);
do_flip(img.GetData(), out.GetData(), 3 * w, h);
if (img.HasAlpha()) {
out.InitAlpha();
do_flip(img.GetAlpha(), out.GetAlpha(), 1 * w, h);
}
return out;
}