diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/main/texformat_tmp.h | 46 |
1 files changed, 14 insertions, 32 deletions
diff --git a/src/mesa/main/texformat_tmp.h b/src/mesa/main/texformat_tmp.h index f98e857629..d0d3804608 100644 --- a/src/mesa/main/texformat_tmp.h +++ b/src/mesa/main/texformat_tmp.h @@ -1334,9 +1334,9 @@ static void store_texel_signed_rgba8888_rev(struct gl_texture_image *texImage, /* MESA_FORMAT_YCBCR *********************************************************/ -/* Fetch texel from 1D, 2D or 3D ycbcr texture, return 4 GLchans */ -/* We convert YCbCr to RGB here */ -/* XXX this may break if GLchan != GLubyte */ +/* Fetch texel from 1D, 2D or 3D ycbcr texture, return 4 GLfloats. + * We convert YCbCr to RGB here. + */ static void FETCH(f_ycbcr)( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { @@ -1346,19 +1346,10 @@ static void FETCH(f_ycbcr)( const struct gl_texture_image *texImage, const GLubyte cb = *src0 & 0xff; /* chroma U */ const GLubyte y1 = (*src1 >> 8) & 0xff; /* luminance */ const GLubyte cr = *src1 & 0xff; /* chroma V */ - GLfloat r, g, b; - if (i & 1) { - /* odd pixel: use y1,cr,cb */ - r = 1.164 * (y1-16) + 1.596 * (cr-128); - g = 1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128); - b = 1.164 * (y1-16) + 2.018 * (cb-128); - } - else { - /* even pixel: use y0,cr,cb */ - r = 1.164 * (y0-16) + 1.596 * (cr-128); - g = 1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128); - b = 1.164 * (y0-16) + 2.018 * (cb-128); - } + const GLfloat y = (i & 1) ? y1 : y0; /* choose even/odd luminance */ + GLfloat r = 1.164 * (y - 16) + 1.596 * (cr - 128); + GLfloat g = 1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128); + GLfloat b = 1.164 * (y - 16) + 2.018 * (cb - 128); r *= (1.0 / 255.0F); g *= (1.0 / 255.0F); b *= (1.0 / 255.0F); @@ -1384,9 +1375,9 @@ static void store_texel_ycbcr(struct gl_texture_image *texImage, /* MESA_FORMAT_YCBCR_REV *****************************************************/ -/* Fetch texel from 1D, 2D or 3D ycbcr_rev texture, return 4 GLchans */ -/* We convert YCbCr to RGB here */ -/* XXX this may break if GLchan != GLubyte */ +/* Fetch texel from 1D, 2D or 3D ycbcr_rev texture, return 4 GLfloats. + * We convert YCbCr to RGB here. + */ static void FETCH(f_ycbcr_rev)( const struct gl_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel ) { @@ -1396,19 +1387,10 @@ static void FETCH(f_ycbcr_rev)( const struct gl_texture_image *texImage, const GLubyte cr = (*src0 >> 8) & 0xff; /* chroma V */ const GLubyte y1 = *src1 & 0xff; /* luminance */ const GLubyte cb = (*src1 >> 8) & 0xff; /* chroma U */ - GLfloat r, g, b; - if (i & 1) { - /* odd pixel: use y1,cr,cb */ - r = 1.164 * (y1-16) + 1.596 * (cr-128); - g = 1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128); - b = 1.164 * (y1-16) + 2.018 * (cb-128); - } - else { - /* even pixel: use y0,cr,cb */ - r = 1.164 * (y0-16) + 1.596 * (cr-128); - g = 1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128); - b = 1.164 * (y0-16) + 2.018 * (cb-128); - } + const GLfloat y = (i & 1) ? y1 : y0; /* choose even/odd luminance */ + GLfloat r = 1.164 * (y - 16) + 1.596 * (cr - 128); + GLfloat g = 1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128); + GLfloat b = 1.164 * (y - 16) + 2.018 * (cb - 128); r *= (1.0 / 255.0F); g *= (1.0 / 255.0F); b *= (1.0 / 255.0F); |