diff options
Diffstat (limited to 'mesalib/src/mesa/main/texcompress_s3tc.c')
| -rw-r--r-- | mesalib/src/mesa/main/texcompress_s3tc.c | 52 |
1 files changed, 13 insertions, 39 deletions
diff --git a/mesalib/src/mesa/main/texcompress_s3tc.c b/mesalib/src/mesa/main/texcompress_s3tc.c index da7725964..476b998e0 100644 --- a/mesalib/src/mesa/main/texcompress_s3tc.c +++ b/mesalib/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; @@ -476,9 +450,9 @@ _mesa_fetch_texel_srgb_dxt1(const struct swrast_texture_image *texImage, /* just sample as GLubyte and convert to float here */ GLubyte rgba[4]; fetch_texel_2d_rgb_dxt1(texImage, i, j, k, rgba); - texel[RCOMP] = nonlinear_to_linear(rgba[RCOMP]); - texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); - texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[RCOMP] = _mesa_nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = _mesa_nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = _mesa_nonlinear_to_linear(rgba[BCOMP]); texel[ACOMP] = UBYTE_TO_FLOAT(rgba[ACOMP]); } @@ -489,9 +463,9 @@ _mesa_fetch_texel_srgba_dxt1(const struct swrast_texture_image *texImage, /* just sample as GLubyte and convert to float here */ GLubyte rgba[4]; fetch_texel_2d_rgba_dxt1(texImage, i, j, k, rgba); - texel[RCOMP] = nonlinear_to_linear(rgba[RCOMP]); - texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); - texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[RCOMP] = _mesa_nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = _mesa_nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = _mesa_nonlinear_to_linear(rgba[BCOMP]); texel[ACOMP] = UBYTE_TO_FLOAT(rgba[ACOMP]); } @@ -502,9 +476,9 @@ _mesa_fetch_texel_srgba_dxt3(const struct swrast_texture_image *texImage, /* just sample as GLubyte and convert to float here */ GLubyte rgba[4]; fetch_texel_2d_rgba_dxt3(texImage, i, j, k, rgba); - texel[RCOMP] = nonlinear_to_linear(rgba[RCOMP]); - texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); - texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[RCOMP] = _mesa_nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = _mesa_nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = _mesa_nonlinear_to_linear(rgba[BCOMP]); texel[ACOMP] = UBYTE_TO_FLOAT(rgba[ACOMP]); } @@ -515,8 +489,8 @@ _mesa_fetch_texel_srgba_dxt5(const struct swrast_texture_image *texImage, /* just sample as GLubyte and convert to float here */ GLubyte rgba[4]; fetch_texel_2d_rgba_dxt5(texImage, i, j, k, rgba); - texel[RCOMP] = nonlinear_to_linear(rgba[RCOMP]); - texel[GCOMP] = nonlinear_to_linear(rgba[GCOMP]); - texel[BCOMP] = nonlinear_to_linear(rgba[BCOMP]); + texel[RCOMP] = _mesa_nonlinear_to_linear(rgba[RCOMP]); + texel[GCOMP] = _mesa_nonlinear_to_linear(rgba[GCOMP]); + texel[BCOMP] = _mesa_nonlinear_to_linear(rgba[BCOMP]); texel[ACOMP] = UBYTE_TO_FLOAT(rgba[ACOMP]); } |