[Mesa-dev] [PATCH 13/20] mesa: Add _mesa_pack_uint_rgba_row() format conversion function

[Iago Toral Quiroga]

From: Samuel Iglesias Gonsalvez <siglesias at igalia.com>

We will use this later on to handle uint conversion scenarios in a master
convert function.

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias at igalia.com>
---
 src/mesa/main/format_pack.c.mako | 88 ++++++++++++++++++++++++++++++++++++++++
 src/mesa/main/format_pack.h      |  3 ++
 2 files changed, 91 insertions(+)

diff --git a/src/mesa/main/format_pack.c.mako b/src/mesa/main/format_pack.c.mako
index 13a20c1..b9f4656 100644
--- a/src/mesa/main/format_pack.c.mako
+++ b/src/mesa/main/format_pack.c.mako
@@ -150,6 +150,62 @@ pack_ubyte_r11g11b10_float(const GLubyte src[4], void *dst)
    *d = float3_to_r11g11b10f(rgb);
 }
 
+/* uint packing functions */
+
+%for f in rgb_formats:
+   %if not f.is_int():
+      <% continue %>
+   %elif f.is_normalized():
+      <% continue %>
+   %elif f.is_compressed():
+      <% continue %>
+   %endif
+
+static inline void
+pack_uint_${f.short_name()}(const GLuint src[4], void *dst)
+{
+   %for (i, c) in enumerate(f.channels):
+      <% i = f.swizzle.inverse()[i] %>
+      %if c.type == 'x':
+         <% continue %>
+      %endif
+
+      ${channel_datatype(c)} ${c.name} =
+      %if not f.is_normalized():
+         %if c.type == parser.FLOAT and c.size == 32:
+            UINT_TO_FLOAT(src[${i}]);
+         %elif c.type == parser.FLOAT and c.size == 16:
+            _mesa_float_to_half(UINT_TO_FLOAT(src[${i}]));
+         %else:
+            (${channel_datatype(c)}) src[${i}];
+         %endif
+      %else:
+         <% assert False %>
+      %endif
+   %endfor
+
+   %if f.layout == parser.ARRAY:
+      ${format_datatype(f)} *d = (${format_datatype(f)} *)dst;
+      %for (i, c) in enumerate(f.channels):
+         %if c.type == 'x':
+            <% continue %>
+         %endif
+         d[${i}] = ${c.name};
+      %endfor
+   %elif f.layout == parser.PACKED:
+      ${format_datatype(f)} d = 0;
+      %for (i, c) in enumerate(f.channels):
+         %if c.type == 'x':
+            <% continue %>
+         %endif
+         d |= PACK(${c.name}, ${c.shift}, ${c.size});
+      %endfor
+      (*(${format_datatype(f)} *)dst) = d;
+   %else:
+      <% assert False %>
+   %endif
+}
+%endfor
 
 /* float packing functions */
 
@@ -298,6 +354,38 @@ _mesa_pack_ubyte_rgba_row(mesa_format format, GLuint n,
 }
 
 /**
+ * Pack a row of GLuint rgba[4] values to the destination.
+ */
+void
+_mesa_pack_uint_rgba_row(mesa_format format, GLuint n,
+                          const GLuint src[][4], void *dst)
+{
+   GLuint i;
+   GLubyte *d = dst;
+
+   switch (format) {
+%for f in rgb_formats:
+   %if not f.is_int():
+      <% continue %>
+   %elif f.is_normalized():
+      <% continue %>
+   %elif f.is_compressed():
+      <% continue %>
+   %endif
+
+   case ${f.name}:
+      for (i = 0; i < n; ++i) {
+         pack_uint_${f.short_name()}(src[i], d);
+         d += ${f.block_size() / 8};
+      }
+      break;
+%endfor
+   default:
+      assert(!"Invalid format");
+   }
+}
+
+/**
  * Pack a row of GLfloat rgba[4] values to the destination.
  */
 void
diff --git a/src/mesa/main/format_pack.h b/src/mesa/main/format_pack.h
index 2577def..1582ad1 100644
--- a/src/mesa/main/format_pack.h
+++ b/src/mesa/main/format_pack.h
@@ -77,6 +77,9 @@ extern void
 _mesa_pack_ubyte_rgba_row(mesa_format format, GLuint n,
                           const GLubyte src[][4], void *dst);
 
+extern void
+_mesa_pack_uint_rgba_row(mesa_format format, GLuint n,
+                         const GLuint src[][4], void *dst);
 
 extern void
 _mesa_pack_ubyte_rgba_rect(mesa_format format, GLuint width, GLuint height,
-- 
1.9.1