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* fixed off-by-one error in scaling algo

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19303 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
2006-11-16 10:16:59 +00:00
parent 9f5078060d
commit 1584cff13b
1 changed files with 2 additions and 2 deletions
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src/libs/icon/IconUtils.cpp
+2 -2
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@@ -331,7 +331,7 @@ scale_bilinear(uint8* bits, int32 srcWidth, int32 srcHeight,
for (int32 x = 0; x < srcWidth; x++) { for (int32 x = 0; x < srcWidth; x++) {
uint8* d = dst; uint8* d = dst;
for (int32 y = dstHeight - 1; y >= 0; y--) { for (int32 y = dstHeight - 1; y >= 0; y--) {
int32 lineF = y * 256 * srcHeight / (dstHeight - 1); int32 lineF = y * 256 * (srcHeight - 1) / (dstHeight - 1);
int32 lineI = lineF >> 8; int32 lineI = lineF >> 8;
uint8 weight = (uint8)(lineF & 0xff); uint8 weight = (uint8)(lineF & 0xff);
uint8* s1 = bits + lineI * bpr + 4 * x; uint8* s1 = bits + lineI * bpr + 4 * x;
@@ -361,7 +361,7 @@ scale_bilinear(uint8* bits, int32 srcWidth, int32 srcHeight,
for (int32 y = 0; y < dstWidth; y++) { for (int32 y = 0; y < dstWidth; y++) {
uint8* d = dst; uint8* d = dst;
for (int32 x = dstWidth - 1; x >= 0; x--) { for (int32 x = dstWidth - 1; x >= 0; x--) {
int32 columnF = x * 256 * srcWidth / (dstWidth - 1); int32 columnF = x * 256 * (srcWidth - 1) / (dstWidth - 1);
int32 columnI = columnF >> 8; int32 columnI = columnF >> 8;
uint8 weight = (uint8)(columnF & 0xff); uint8 weight = (uint8)(columnF & 0xff);
uint8* s1 = bits + y * bpr + 4 * columnI; uint8* s1 = bits + y * bpr + 4 * columnI;