diff options
| -rw-r--r-- | src/mesa/main/formats.c | 22 | ||||
| -rw-r--r-- | src/mesa/main/formats.h | 4 |
2 files changed, 25 insertions, 1 deletions
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c index 82843a3291..ebe59f8960 100644 --- a/src/mesa/main/formats.c +++ b/src/mesa/main/formats.c @@ -602,12 +602,13 @@ _mesa_format_image_size(gl_format format, GLsizei width, GLsizei height, GLsizei depth) { const struct gl_format_info *info = _mesa_get_format_info(format); + /* Strictly speaking, a conditional isn't needed here */ if (info->BlockWidth > 1 || info->BlockHeight > 1) { /* compressed format */ const GLuint bw = info->BlockWidth, bh = info->BlockHeight; const GLuint wblocks = (width + bw - 1) / bw; const GLuint hblocks = (height + bh - 1) / bh; - const GLuint sz = wblocks * hblocks * info->BytesPerBlock; + const GLuint sz = wblocks * hblocks * info->BytesPerBlock; return sz; } else { @@ -619,6 +620,25 @@ _mesa_format_image_size(gl_format format, GLsizei width, +GLint +_mesa_format_row_stride(gl_format format, GLsizei width) +{ + const struct gl_format_info *info = _mesa_get_format_info(format); + /* Strictly speaking, a conditional isn't needed here */ + if (info->BlockWidth > 1 || info->BlockHeight > 1) { + /* compressed format */ + const GLuint bw = info->BlockWidth; + const GLuint wblocks = (width + bw - 1) / bw; + const GLint stride = wblocks * info->BytesPerBlock; + return stride; + } + else { + const GLint stride = width * info->BytesPerBlock; + return stride; + } +} + + /** * Do sanity checking of the format info table. diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h index b91682809f..316ff1a8ec 100644 --- a/src/mesa/main/formats.h +++ b/src/mesa/main/formats.h @@ -206,6 +206,10 @@ extern GLuint _mesa_format_image_size(gl_format format, GLsizei width, GLsizei height, GLsizei depth); +extern GLint +_mesa_format_row_stride(gl_format format, GLsizei width); + + extern void _mesa_test_formats(void); |