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wrlib: fixed transformation functions

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With a set of images i was able to detect that
the flip functions was shifting the image by 1px.

The 90 and 270 degrees rotation were not working as
the functions were also mirroring the img.

The patch is also fixing the C style based on checkpatch.
This commit is contained in:
David Maciejak
2014-05-26 22:42:44 +08:00
committed by Carlos R. Mafra
parent dda7f48407
commit 35a43c9430
2 changed files with 99 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
wrlib/flip.c
View File

@@ -46,7 +46,7 @@ RImage *RVerticalFlipImage(RImage *image)
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
optr = image->data; optr = image->data;
nptr = img->data + 4 * (nwidth * nheight - nwidth - 1); nptr = img->data + 4 * (nwidth * nheight - nwidth);
for (y = 0; y < nheight; y++) { for (y = 0; y < nheight; y++) {
for (x = 0; x < nwidth; x++) { for (x = 0; x < nwidth; x++) {
@@ -64,7 +64,7 @@ RImage *RVerticalFlipImage(RImage *image)
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
optr = image->data; optr = image->data;
nptr = img->data + 4 * (nwidth * nheight - nwidth - 1); nptr = img->data + 4 * (nwidth * nheight - nwidth);
for (y = 0; y < nheight; y++) { for (y = 0; y < nheight; y++) {
for (x = 0; x < nwidth; x++) { for (x = 0; x < nwidth; x++) {
@@ -99,34 +99,38 @@ RImage *RHorizontalFlipImage(RImage *image)
if (bpp == 3) { if (bpp == 3) {
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
nptr = img->data + nwidth * nheight * 4 - 4; optr = image->data;
nptr = img->data + 4 * (nwidth - 1);
for (y = nheight; y; y--) { for (y = nheight; y; y--) {
for (x = 0; x < nwidth; x++) { for (x = 0; x < nwidth; x++) {
optr = image->data + (y*nwidth + x) * 3;
nptr[0] = optr[0]; nptr[0] = optr[0];
nptr[1] = optr[1]; nptr[1] = optr[1];
nptr[2] = optr[2]; nptr[2] = optr[2];
nptr[3] = 255; nptr[3] = 255;
optr += 3;
nptr -= 4; nptr -= 4;
} }
nptr += 8 * nwidth;
} }
} else { } else {
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
nptr = img->data + nwidth * nheight * 4 - 4; optr = image->data;
nptr = img->data + 4 * (nwidth - 1);
for (y = nheight; y; y--) { for (y = nheight; y; y--) {
for (x = 0; x < nwidth; x++) { for (x = 0; x < nwidth; x++) {
optr = image->data + (y*nwidth + x) * 4;
nptr[0] = optr[0]; nptr[0] = optr[0];
nptr[1] = optr[1]; nptr[1] = optr[1];
nptr[2] = optr[2]; nptr[2] = optr[2];
nptr[3] = optr[3]; nptr[3] = optr[3];
optr += 4;
nptr -= 4; nptr -= 4;
} }
nptr += 8 * nwidth;
} }
} }
return img; return img;

67
wrlib/rotate.c
View File

@@ -66,40 +66,41 @@ RImage *RRotateImage(RImage * image, float angle)
nheight = image->width; nheight = image->width;
img = RCreateImage(nwidth, nheight, True); img = RCreateImage(nwidth, nheight, True);
if (!img) { if (!img)
return NULL; return NULL;
}
if (bpp == 3) { if (bpp == 3) {
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
unsigned offs;
offs = nwidth * 4;
optr = image->data; optr = image->data;
nptr = img->data;
for (x = 0; x < nwidth; x++) { for (x = nwidth; x; x--) {
nptr = img->data + x * 4; nptr = img->data + 4 * (x - 1);
for (y = nheight; y; y--) { for (y = nheight; y; y--) {
nptr[0] = *optr++; nptr[0] = *optr++;
nptr[1] = *optr++; nptr[1] = *optr++;
nptr[2] = *optr++; nptr[2] = *optr++;
nptr[3] = 255; nptr[3] = 255;
nptr += offs; nptr += 4 * nwidth;
} }
} }
} else { } else {
unsigned *optr, *nptr; unsigned char *optr, *nptr;
unsigned *p;
optr = (unsigned *)image->data; optr = image->data;
p = (unsigned *)img->data; nptr = img->data;
for (x = 0; x < nwidth; x++) {
nptr = p++; for (x = nwidth; x; x--) {
nptr = img->data + 4 * (x - 1);
for (y = nheight; y; y--) { for (y = nheight; y; y--) {
*nptr = *optr++; nptr[0] = *optr++;
nptr += nwidth; nptr[1] = *optr++;
nptr[2] = *optr++;
nptr[3] = *optr++;
nptr += 4 * nwidth;
} }
} }
} }
@@ -109,9 +110,8 @@ RImage *RRotateImage(RImage * image, float angle)
nwidth = image->width; nwidth = image->width;
nheight = image->height; nheight = image->height;
img = RCreateImage(nwidth, nheight, True); img = RCreateImage(nwidth, nheight, True);
if (!img) { if (!img)
return NULL; return NULL;
}
if (bpp == 3) { if (bpp == 3) {
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
@@ -148,40 +148,39 @@ RImage *RRotateImage(RImage * image, float angle)
nheight = image->width; nheight = image->width;
img = RCreateImage(nwidth, nheight, True); img = RCreateImage(nwidth, nheight, True);
if (!img) { if (!img)
return NULL; return NULL;
}
if (bpp == 3) { if (bpp == 3) {
unsigned char *optr, *nptr; unsigned char *optr, *nptr;
unsigned offs;
offs = nwidth * 4;
optr = image->data; optr = image->data;
for (x = 0; x < nwidth; x++) { for (x = nwidth; x; x--) {
nptr = img->data + x * 4; nptr = img->data + 4 * nwidth * nheight - x * 4;
for (y = nheight; y; y--) { for (y = nheight; y; y--) {
nptr[0] = *optr++; nptr[0] = *optr++;
nptr[1] = *optr++; nptr[1] = *optr++;
nptr[2] = *optr++; nptr[2] = *optr++;
nptr[3] = 255; nptr[3] = 255;
nptr += offs; nptr -= 4 * nwidth;
} }
} }
} else { } else {
unsigned *optr, *nptr; unsigned char *optr, *nptr;
unsigned *p;
optr = (unsigned *)image->data; optr = image->data;
p = (unsigned *)img->data + nwidth * nheight;
for (x = 0; x < nwidth; x++) { for (x = nwidth; x; x--) {
nptr = p--; nptr = img->data + 4 * nwidth * nheight - x * 4;
for (y = nheight; y; y--) { for (y = nheight; y; y--) {
*nptr = *optr++; nptr[0] = *optr++;
nptr -= nwidth; nptr[1] = *optr++;
nptr[2] = *optr++;
nptr[3] = *optr++;
nptr -= 4 * nwidth;
} }
} }
} }