mesa/formats: add more MESA_FORMAT_LAYOUTs

Add the classes of compressed formats as layouts. This allows the detection
of compressed formats belonging to a certain category of compressed formats.

v2. simplify layout name construction (Ilia).

Reviewed-by: Chad Versace <chad.versace@intel.com>
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>

src/mesa/main/format_info.py

@@ -98,14 +98,6 @@ def get_gl_data_type(fmat):
    else:
       assert False
 
-def get_mesa_layout(fmat):
-   if fmat.layout == 'array':
-      return 'MESA_FORMAT_LAYOUT_ARRAY'
-   elif fmat.layout == 'packed':
-      return 'MESA_FORMAT_LAYOUT_PACKED'
-   else:
-      return 'MESA_FORMAT_LAYOUT_OTHER'
-
 def get_channel_bits(fmat, chan_name):
    if fmat.is_compressed():
       # These values are pretty-much bogus, but OpenGL requires that we
@@ -179,7 +171,7 @@ for fmat in formats:
    print '   {'
    print '      {0},'.format(fmat.name)
    print '      "{0}",'.format(fmat.name)
-   print '      {0},'.format(get_mesa_layout(fmat))
+   print '      {0},'.format('MESA_FORMAT_LAYOUT_' + fmat.layout.upper())
    print '      {0},'.format(get_gl_base_format(fmat))
    print '      {0},'.format(get_gl_data_type(fmat))
 

src/mesa/main/formats.c

@@ -188,6 +188,12 @@ _mesa_get_format_max_bits(mesa_format format)
  * The return value will be one of:
  *    MESA_FORMAT_LAYOUT_ARRAY
  *    MESA_FORMAT_LAYOUT_PACKED
+ *    MESA_FORMAT_LAYOUT_S3TC
+ *    MESA_FORMAT_LAYOUT_RGTC
+ *    MESA_FORMAT_LAYOUT_FXT1
+ *    MESA_FORMAT_LAYOUT_ETC1
+ *    MESA_FORMAT_LAYOUT_ETC2
+ *    MESA_FORMAT_LAYOUT_BPTC
  *    MESA_FORMAT_LAYOUT_OTHER
  */
 extern enum mesa_format_layout

src/mesa/main/formats.h

@@ -64,6 +64,12 @@ extern "C" {
 enum mesa_format_layout {
    MESA_FORMAT_LAYOUT_ARRAY,
    MESA_FORMAT_LAYOUT_PACKED,
+   MESA_FORMAT_LAYOUT_S3TC,
+   MESA_FORMAT_LAYOUT_RGTC,
+   MESA_FORMAT_LAYOUT_FXT1,
+   MESA_FORMAT_LAYOUT_ETC1,
+   MESA_FORMAT_LAYOUT_ETC2,
+   MESA_FORMAT_LAYOUT_BPTC,
    MESA_FORMAT_LAYOUT_OTHER,
 };
 

src/mesa/main/texcompress.c

@@ -586,34 +586,16 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img,
 compressed_fetch_func
 _mesa_get_compressed_fetch_func(mesa_format format)
 {
-   switch (format) {
-   case MESA_FORMAT_RGB_DXT1:
-   case MESA_FORMAT_RGBA_DXT1:
-   case MESA_FORMAT_RGBA_DXT3:
-   case MESA_FORMAT_RGBA_DXT5:
-   case MESA_FORMAT_SRGB_DXT1:
-   case MESA_FORMAT_SRGBA_DXT1:
-   case MESA_FORMAT_SRGBA_DXT3:
-   case MESA_FORMAT_SRGBA_DXT5:
+   switch (_mesa_get_format_layout(format)) {
+   case MESA_FORMAT_LAYOUT_S3TC:
       return _mesa_get_dxt_fetch_func(format);
-   case MESA_FORMAT_RGB_FXT1:
-   case MESA_FORMAT_RGBA_FXT1:
+   case MESA_FORMAT_LAYOUT_FXT1:
       return _mesa_get_fxt_fetch_func(format);
-   case MESA_FORMAT_R_RGTC1_UNORM:
-   case MESA_FORMAT_L_LATC1_UNORM:
-   case MESA_FORMAT_R_RGTC1_SNORM:
-   case MESA_FORMAT_L_LATC1_SNORM:
-   case MESA_FORMAT_RG_RGTC2_UNORM:
-   case MESA_FORMAT_LA_LATC2_UNORM:
-   case MESA_FORMAT_RG_RGTC2_SNORM:
-   case MESA_FORMAT_LA_LATC2_SNORM:
+   case MESA_FORMAT_LAYOUT_RGTC:
       return _mesa_get_compressed_rgtc_func(format);
-   case MESA_FORMAT_ETC1_RGB8:
+   case MESA_FORMAT_LAYOUT_ETC1:
       return _mesa_get_etc_fetch_func(format);
-   case MESA_FORMAT_BPTC_RGBA_UNORM:
-   case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
-   case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
-   case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
+   case MESA_FORMAT_LAYOUT_BPTC:
       return _mesa_get_bptc_fetch_func(format);
    default:
       return NULL;