mesa/main: Use the RGB <-> sRGB conversion functions in libmesautil

Signed-off-by: Jason Ekstrand <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>

2 files changed, 18 insertions, 46 deletions

diff --git a/src/mesa/swrast/s_texfetch.c b/src/mesa/swrast/s_texfetch.c
index e508368c8dc..aef02321764 100644
--- a/src/mesa/swrast/s_texfetch.c
+++ b/src/mesa/swrast/s_texfetch.c
@@ -46,35 +46,7 @@
 #include "s_texfetch.h"
 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
-
-
-/**
- * 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];
-}
-
+#include "util/format_srgb.h"
 
 
 /* Texel fetch routines for all supported formats
diff --git a/src/mesa/swrast/s_texfetch_tmp.h b/src/mesa/swrast/s_texfetch_tmp.h
index deda59246c0..72037ec0020 100644
--- a/src/mesa/swrast/s_texfetch_tmp.h
+++ b/src/mesa/swrast/s_texfetch_tmp.h
@@ -737,9 +737,9 @@ FETCH(BGR_SRGB8)(const struct swrast_texture_image *texImage,
                  GLint i, GLint j, GLint k, GLfloat *texel)
 {
    const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
-   texel[RCOMP] = nonlinear_to_linear(src[2]);
-   texel[GCOMP] = nonlinear_to_linear(src[1]);
-   texel[BCOMP] = nonlinear_to_linear(src[0]);
+   texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(src[2]);
+   texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(src[1]);
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(src[0]);
    texel[ACOMP] = 1.0F;
 }
 
@@ -749,9 +749,9 @@ FETCH(A8B8G8R8_SRGB)(const struct swrast_texture_image *texImage,
                      GLint i, GLint j, GLint k, GLfloat *texel)
 {
    const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
-   texel[RCOMP] = nonlinear_to_linear( (s >> 24) );
-   texel[GCOMP] = nonlinear_to_linear( (s >> 16) & 0xff );
-   texel[BCOMP] = nonlinear_to_linear( (s >>  8) & 0xff );
+   texel[RCOMP] = util_format_srgb_8unorm_to_linear_float( (s >> 24) );
+   texel[GCOMP] = util_format_srgb_8unorm_to_linear_float( (s >> 16) & 0xff );
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float( (s >>  8) & 0xff );
    texel[ACOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff ); /* linear! */
 }
 
@@ -761,9 +761,9 @@ FETCH(B8G8R8A8_SRGB)(const struct swrast_texture_image *texImage,
                      GLint i, GLint j, GLint k, GLfloat *texel)
 {
    const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
-   texel[RCOMP] = nonlinear_to_linear( (s >> 16) & 0xff );
-   texel[GCOMP] = nonlinear_to_linear( (s >>  8) & 0xff );
-   texel[BCOMP] = nonlinear_to_linear( (s      ) & 0xff );
+   texel[RCOMP] = util_format_srgb_8unorm_to_linear_float( (s >> 16) & 0xff );
+   texel[GCOMP] = util_format_srgb_8unorm_to_linear_float( (s >>  8) & 0xff );
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float( (s      ) & 0xff );
    texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24) ); /* linear! */
 }
 
@@ -773,9 +773,9 @@ FETCH(R8G8B8A8_SRGB)(const struct swrast_texture_image *texImage,
                      GLint i, GLint j, GLint k, GLfloat *texel)
 {
    const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
-   texel[RCOMP] = nonlinear_to_linear( (s      ) & 0xff );
-   texel[GCOMP] = nonlinear_to_linear( (s >>  8) & 0xff );
-   texel[BCOMP] = nonlinear_to_linear( (s >> 16) & 0xff );
+   texel[RCOMP] = util_format_srgb_8unorm_to_linear_float( (s      ) & 0xff );
+   texel[GCOMP] = util_format_srgb_8unorm_to_linear_float( (s >>  8) & 0xff );
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float( (s >> 16) & 0xff );
    texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24) ); /* linear! */
 }
 
@@ -785,9 +785,9 @@ FETCH(R8G8B8X8_SRGB)(const struct swrast_texture_image *texImage,
                      GLint i, GLint j, GLint k, GLfloat *texel)
 {
    const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
-   texel[RCOMP] = nonlinear_to_linear( (s      ) & 0xff );
-   texel[GCOMP] = nonlinear_to_linear( (s >>  8) & 0xff );
-   texel[BCOMP] = nonlinear_to_linear( (s >> 16) & 0xff );
+   texel[RCOMP] = util_format_srgb_8unorm_to_linear_float( (s      ) & 0xff );
+   texel[GCOMP] = util_format_srgb_8unorm_to_linear_float( (s >>  8) & 0xff );
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float( (s >> 16) & 0xff );
    texel[ACOMP] = 1.0f;
 }
 
@@ -799,7 +799,7 @@ FETCH(L_SRGB8)(const struct swrast_texture_image *texImage,
    const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
    texel[RCOMP] =
    texel[GCOMP] =
-   texel[BCOMP] = nonlinear_to_linear(src[0]);
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(src[0]);
    texel[ACOMP] = 1.0F;
 }
 
@@ -811,7 +811,7 @@ FETCH(L8A8_SRGB)(const struct swrast_texture_image *texImage,
    const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 2);
    texel[RCOMP] =
    texel[GCOMP] =
-   texel[BCOMP] = nonlinear_to_linear(src[0]);
+   texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(src[0]);
    texel[ACOMP] = UBYTE_TO_FLOAT(src[1]); /* linear */
 }