diff options
| -rw-r--r-- | src/gallium/include/pipe/p_format.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/gallium/include/pipe/p_format.h b/src/gallium/include/pipe/p_format.h index d9aa5792a44..97a4c8c510b 100644 --- a/src/gallium/include/pipe/p_format.h +++ b/src/gallium/include/pipe/p_format.h @@ -531,6 +531,35 @@ pf_is_ycbcr( enum pipe_format format ) return pf_layout(format) == PIPE_FORMAT_LAYOUT_YCBCR ? TRUE : FALSE; } +static INLINE boolean +pf_has_alpha( enum pipe_format format ) +{ + switch (pf_layout(format)) { + case PIPE_FORMAT_LAYOUT_RGBAZS: + case PIPE_FORMAT_LAYOUT_MIXED: + /* FIXME: pf_get_component_bits( PIPE_FORMAT_A8L8_UNORM, PIPE_FORMAT_COMP_A ) should not return 0 right? */ + if(format == PIPE_FORMAT_A8_UNORM || + format == PIPE_FORMAT_A8L8_UNORM || + format == PIPE_FORMAT_A8_L8_SRGB) + return TRUE; + return pf_get_component_bits( format, PIPE_FORMAT_COMP_A ) ? TRUE : FALSE; + case PIPE_FORMAT_LAYOUT_YCBCR: + return FALSE; + case PIPE_FORMAT_LAYOUT_DXT: + switch (format) { + case PIPE_FORMAT_DXT1_RGBA: + case PIPE_FORMAT_DXT3_RGBA: + case PIPE_FORMAT_DXT5_RGBA: + return TRUE; + default: + return FALSE; + } + default: + assert( 0 ); + return FALSE; + } +} + #ifdef __cplusplus } #endif |