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| author | Pierre Ossman <ossman@cendio.se> | 2018-11-23 16:12:17 +0100 |
|---|---|---|
| committer | Pierre Ossman <ossman@cendio.se> | 2018-11-23 16:12:17 +0100 |
| commit | 6c38a0876824daf2bd86c60d37328cd79b48182a (patch) | |
| tree | 6e78cdf8fa404481976e4408a11f19fbcd4c4623 | |
| parent | 1f44e85bf403bfe9dd7298d37ae490fb0fc27cd6 (diff) | |
| download | tigervnc-6c38a0876824daf2bd86c60d37328cd79b48182a.tar.gz tigervnc-6c38a0876824daf2bd86c60d37328cd79b48182a.zip | |
Use larger integers for the cursor dithering
We need a larger range to handle the temporary overflow caused by
the Floyd-Steinberg dithering.
| -rw-r--r-- | common/rfb/Cursor.cxx | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/common/rfb/Cursor.cxx b/common/rfb/Cursor.cxx index d0feaa55..d7b536de 100644 --- a/common/rfb/Cursor.cxx +++ b/common/rfb/Cursor.cxx @@ -76,7 +76,7 @@ static unsigned short srgb_to_lin(unsigned char srgb) } // Floyd-Steinberg dithering -static void dither(int width, int height, rdr::U16* data) +static void dither(int width, int height, rdr::S32* data) { for (int y = 0; y < height; y++) { for (int x_ = 0; x_ < width; x_++) { @@ -122,12 +122,12 @@ static void dither(int width, int height, rdr::U16* data) rdr::U8* Cursor::getBitmap() const { // First step is converting to luminance - rdr::U16Array luminance(width()*height()); - rdr::U16 *lum_ptr = luminance.buf; + rdr::S32Array luminance(width()*height()); + rdr::S32 *lum_ptr = luminance.buf; const rdr::U8 *data_ptr = data; for (int y = 0; y < height(); y++) { for (int x = 0; x < width(); x++) { - rdr::U32 lum; + rdr::S32 lum; // Use BT.709 coefficients for grayscale lum = 0; @@ -167,8 +167,8 @@ rdr::U8* Cursor::getBitmap() const rdr::U8* Cursor::getMask() const { // First step is converting to integer array - rdr::U16Array alpha(width()*height()); - rdr::U16 *alpha_ptr = alpha.buf; + rdr::S32Array alpha(width()*height()); + rdr::S32 *alpha_ptr = alpha.buf; const rdr::U8 *data_ptr = data; for (int y = 0; y < height(); y++) { for (int x = 0; x < width(); x++) { |