[Mesa-dev] [PATCH 02/13] mesa: Make nonlinear_to_linear() function available outside file

[Anuj Phogat]

This patch changes nonlinear_to_linear() function to non static inline
and makes it available outside format_unpack.c. Also, removes the
duplicate copies in other files.

Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
---
 src/mesa/main/format_unpack.c    |    2 +-
 src/mesa/main/format_unpack.h    |    3 +++
 src/mesa/main/texcompress_s3tc.c |   28 +---------------------------
 3 files changed, 5 insertions(+), 28 deletions(-)

diff --git a/src/mesa/main/format_unpack.c b/src/mesa/main/format_unpack.c
index d31d2fa..f831aec 100644
--- a/src/mesa/main/format_unpack.c
+++ b/src/mesa/main/format_unpack.c
@@ -57,7 +57,7 @@ struct z32f_x24s8
  * linear RGB value in [0, 1].
  * Implemented with a 256-entry lookup table.
  */
-static inline GLfloat
+GLfloat
 nonlinear_to_linear(GLubyte cs8)
 {
    static GLfloat table[256];
diff --git a/src/mesa/main/format_unpack.h b/src/mesa/main/format_unpack.h
index aad800d..77b640a 100644
--- a/src/mesa/main/format_unpack.h
+++ b/src/mesa/main/format_unpack.h
@@ -24,6 +24,9 @@
 #ifndef FORMAT_UNPACK_H
 #define FORMAT_UNPACK_H
 
+extern GLfloat
+nonlinear_to_linear(GLubyte cs8);
+
 extern void
 _mesa_unpack_rgba_row(gl_format format, GLuint n,
                       const void *src, GLfloat dst[][4]);
diff --git a/src/mesa/main/texcompress_s3tc.c b/src/mesa/main/texcompress_s3tc.c
index 6476f11..472a6a7 100644
--- a/src/mesa/main/texcompress_s3tc.c
+++ b/src/mesa/main/texcompress_s3tc.c
@@ -45,6 +45,7 @@
 #include "texcompress_s3tc.h"
 #include "texstore.h"
 #include "swrast/s_context.h"
+#include "format_unpack.h"
 
 
 #if defined(_WIN32) || defined(WIN32)
@@ -57,33 +58,6 @@
 #define DXTN_LIBNAME "libtxc_dxtn.so"
 #endif
 
-/**
- * Convert an 8-bit sRGB value from non-linear space to a
- * linear RGB value in [0, 1].
- * Implemented with a 256-entry lookup table.
- */
-static inline GLfloat
-nonlinear_to_linear(GLubyte cs8)
-{
-   static GLfloat table[256];
-   static GLboolean tableReady = GL_FALSE;
-   if (!tableReady) {
-      /* compute lookup table now */
-      GLuint i;
-      for (i = 0; i < 256; i++) {
-         const GLfloat cs = UBYTE_TO_FLOAT(i);
-         if (cs <= 0.04045) {
-            table[i] = cs / 12.92f;
-         }
-         else {
-            table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
-         }
-      }
-      tableReady = GL_TRUE;
-   }
-   return table[cs8];
-}
-
 typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut );
 
 static dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL;
-- 
1.7.7.6