/*!
* pixRotateAMColor()
*
* Input: pixs (32 bpp)
* angle (radians; clockwise is positive)
* colorval (e.g., 0 to bring in BLACK, 0xffffff00 for WHITE)
* Return: pixd, or null on error
*
* Notes:
* (1) Rotates about image center.
* (2) A positive angle gives a clockwise rotation.
* (3) Specify the color to be brought in from outside the image.
*/
PIX *
pixRotateAMColor(PIX *pixs,
l_float32 angle,
l_uint32 colorval)
{
l_int32 w, h, wpls, wpld;
l_uint32 *datas, *datad;
PIX *pixd;
PROCNAME("pixRotateAMColor");
if (!pixs)
return (PIX *)ERROR_PTR("pixs not defined", procName, NULL);
if (pixGetDepth(pixs) != 32)
return (PIX *)ERROR_PTR("pixs must be 32 bpp", procName, NULL);
if (L_ABS(angle) < VERY_SMALL_ANGLE)
return pixClone(pixs);
pixGetDimensions(pixs, &w, &h, NULL);
datas = pixGetData(pixs);
wpls = pixGetWpl(pixs);
pixd = pixCreateTemplate(pixs);
datad = pixGetData(pixd);
wpld = pixGetWpl(pixd);
rotateAMColorLow(datad, w, h, wpld, datas, wpls, angle, colorval);
return pixd;
}
/*!
* pixRotateAMColor()
*
* Input: pixs (32 bpp)
* angle (radians; clockwise is positive)
* colorval (e.g., 0 to bring in BLACK, 0xffffff00 for WHITE)
* Return: pixd, or null on error
*
* Notes:
* (1) Rotates about image center.
* (2) A positive angle gives a clockwise rotation.
* (3) Specify the color to be brought in from outside the image.
*/
PIX *
pixRotateAMColor(PIX *pixs,
l_float32 angle,
l_uint32 colorval)
{
l_int32 w, h, wpls, wpld;
l_uint32 *datas, *datad;
PIX *pix1, *pix2, *pixd;
PROCNAME("pixRotateAMColor");
if (!pixs)
return (PIX *)ERROR_PTR("pixs not defined", procName, NULL);
if (pixGetDepth(pixs) != 32)
return (PIX *)ERROR_PTR("pixs must be 32 bpp", procName, NULL);
if (L_ABS(angle) < MIN_ANGLE_TO_ROTATE)
return pixClone(pixs);
pixGetDimensions(pixs, &w, &h, NULL);
datas = pixGetData(pixs);
wpls = pixGetWpl(pixs);
pixd = pixCreateTemplate(pixs);
datad = pixGetData(pixd);
wpld = pixGetWpl(pixd);
rotateAMColorLow(datad, w, h, wpld, datas, wpls, angle, colorval);
if (pixGetSpp(pixs) == 4) {
pix1 = pixGetRGBComponent(pixs, L_ALPHA_CHANNEL);
pix2 = pixRotateAMGray(pix1, angle, 255); /* bring in opaque */
pixSetRGBComponent(pixd, pix2, L_ALPHA_CHANNEL);
pixDestroy(&pix1);
pixDestroy(&pix2);
}
return pixd;
}
