X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fformat_fallback.py;h=cc388274e750fa6685cf726a1dd637e1c1670fbb;hb=51c1c4d95a05b6eb6fce74e8d624615e4a1b38ab;hp=a833eabf664008fa6b353002570bceeb89bbf70e;hpb=361eb1c6e765c393cb0b398124772b60a24ac36c;p=mesa.git

diff --git a/src/mesa/main/format_fallback.py b/src/mesa/main/format_fallback.py
index a833eabf664..cc388274e75 100644
--- a/src/mesa/main/format_fallback.py
+++ b/src/mesa/main/format_fallback.py
@@ -85,8 +85,23 @@ def get_rgbx_to_rgba_map(formats):
 
         yield rgbx_name, rgba_name
 
+def get_intensity_to_red_map(formats):
+    names = set(fmt.name for fmt in formats)
+
+    for fmt in formats:
+        if str(fmt.swizzle) != 'xxxx':
+            continue
+
+        i_name = fmt.name
+        r_name = i_name.replace("_I_", "_R_")
+
+        assert r_name in names
+
+        yield i_name, r_name
+
 TEMPLATE = Template(COPYRIGHT + """
 #include "formats.h"
+#include "util/macros.h"
 
 /**
  * For an sRGB format, return the corresponding linear color space format.
@@ -105,6 +120,45 @@ _mesa_get_srgb_format_linear(mesa_format format)
    }
 }
 
+/**
+ * For a linear format, return the corresponding sRGB color space format.
+ * For an sRGB format, return the format as-is.
+ * Assert-fails if the format is not sRGB and does not have an sRGB equivalent.
+ */
+mesa_format
+_mesa_get_linear_format_srgb(mesa_format format)
+{
+   switch (format) {
+%for unorm, srgb in unorm_to_srgb_map:
+   case ${unorm}:
+      return ${srgb};
+%endfor
+%for unorm, srgb in unorm_to_srgb_map:
+   case ${srgb}:
+%endfor
+      return format;
+   default:
+      unreachable("Given format does not have an sRGB equivalent");
+   }
+}
+
+/**
+ * For an intensity format, return the corresponding red format.  For other
+ * formats, return the format as-is.
+ */
+mesa_format
+_mesa_get_intensity_format_red(mesa_format format)
+{
+   switch (format) {
+%for i, r in intensity_to_red_map:
+   case ${i}:
+      return ${r};
+%endfor
+   default:
+      return format;
+   }
+}
+
 /**
  * If the format has an alpha channel, and there exists a non-alpha
  * variant of the format with an identical bit layout, then return
@@ -141,6 +195,7 @@ def main():
     template_env = {
         'unorm_to_srgb_map': list(get_unorm_to_srgb_map(formats)),
         'rgbx_to_rgba_map': list(get_rgbx_to_rgba_map(formats)),
+        'intensity_to_red_map': list(get_intensity_to_red_map(formats)),
     }
 
     with open(pargs.out, 'w') as f: