diff options
Diffstat (limited to 'src/im_format_sgi.cpp')
| -rw-r--r-- | src/im_format_sgi.cpp | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/im_format_sgi.cpp b/src/im_format_sgi.cpp index 08bbf4d..695340b 100644 --- a/src/im_format_sgi.cpp +++ b/src/im_format_sgi.cpp @@ -2,7 +2,7 @@ * \brief SGI - Silicon Graphics Image File Format * * See Copyright Notice in im_lib.h - * $Id: im_format_sgi.cpp,v 1.2 2008/12/03 15:45:34 scuri Exp $ + * $Id: im_format_sgi.cpp,v 1.3 2011/01/19 16:28:59 scuri Exp $ */ #include "im_format.h" @@ -300,9 +300,13 @@ int imFileFormatSGI::ReadImageInfo(int index) switch (dimension) { case 1: + // If this value is 1, the image file consists of only 1 channel and only 1 scanline (row). + // Only width is valid. this->height = 1; depth = 1; case 2: + // If this value is 2, the file consists of a single channel with a number of scanlines. + // Only width and height are valid. depth = 1; break; case 3: @@ -319,6 +323,10 @@ int imFileFormatSGI::ReadImageInfo(int index) case 1: this->file_color_mode = IM_GRAY; break; + case 2: + // This is NOT mentioned by the specification, but it is used + this->file_color_mode = IM_GRAY | IM_ALPHA; + break; case 3: this->file_color_mode = IM_RGB; break; @@ -411,6 +419,13 @@ int imFileFormatSGI::WriteImageInfo() if (imColorModeHasAlpha(this->user_color_mode)) this->file_color_mode |= IM_ALPHA; } + else if (this->file_color_mode == IM_GRAY && + imColorModeHasAlpha(this->user_color_mode)) + { + // This is NOT mentioned by the specification, but it is used + dimension = 3; + this->file_color_mode |= IM_ALPHA; + } this->file_data_type = this->user_data_type; |