diff options
Diffstat (limited to 'uxa/uxa-render.c')
| -rw-r--r-- | uxa/uxa-render.c | 64 |
1 files changed, 39 insertions, 25 deletions
diff --git a/uxa/uxa-render.c b/uxa/uxa-render.c index 826602bc..512ac02d 100644 --- a/uxa/uxa-render.c +++ b/uxa/uxa-render.c @@ -146,11 +146,6 @@ uxa_get_pixel_from_rgba(CARD32 * pixel, int rbits, bbits, gbits, abits; int rshift, bshift, gshift, ashift; - *pixel = 0; - - if (!PICT_FORMAT_COLOR(format)) - return FALSE; - rbits = PICT_FORMAT_R(format); gbits = PICT_FORMAT_G(format); bbits = PICT_FORMAT_B(format); @@ -158,6 +153,14 @@ uxa_get_pixel_from_rgba(CARD32 * pixel, if (abits == 0) abits = PICT_FORMAT_BPP(format) - (rbits+gbits+bbits); + if (PICT_FORMAT_TYPE(format) == PICT_TYPE_A) { + *pixel = alpha >> (16 - abits); + return TRUE; + } + + if (!PICT_FORMAT_COLOR(format)) + return FALSE; + if (PICT_FORMAT_TYPE(format) == PICT_TYPE_ARGB) { bshift = 0; gshift = bbits; @@ -170,6 +173,7 @@ uxa_get_pixel_from_rgba(CARD32 * pixel, ashift = bshift + bbits; } + *pixel = 0; *pixel |= (blue >> (16 - bbits)) << bshift; *pixel |= (red >> (16 - rbits)) << rshift; *pixel |= (green >> (16 - gbits)) << gshift; @@ -187,43 +191,53 @@ uxa_get_rgba_from_pixel(CARD32 pixel, int rbits, bbits, gbits, abits; int rshift, bshift, gshift, ashift; - if (!PICT_FORMAT_COLOR(format)) - return FALSE; - rbits = PICT_FORMAT_R(format); gbits = PICT_FORMAT_G(format); bbits = PICT_FORMAT_B(format); abits = PICT_FORMAT_A(format); - if (PICT_FORMAT_TYPE(format) == PICT_TYPE_ARGB) { + if (PICT_FORMAT_TYPE(format) == PICT_TYPE_A) { + rshift = gshift = bshift = ashift = 0; + } else if (PICT_FORMAT_TYPE(format) == PICT_TYPE_ARGB) { bshift = 0; gshift = bbits; rshift = gshift + gbits; ashift = rshift + rbits; - } else { /* PICT_TYPE_ABGR */ + } else if (PICT_FORMAT_TYPE(format) == PICT_TYPE_ABGR) { rshift = 0; gshift = rbits; bshift = gshift + gbits; ashift = bshift + bbits; + } else { + return FALSE; } - *red = ((pixel >> rshift) & ((1 << rbits) - 1)) << (16 - rbits); - while (rbits < 16) { - *red |= *red >> rbits; - rbits <<= 1; - } + if (rbits) { + *red = ((pixel >> rshift) & ((1 << rbits) - 1)) << (16 - rbits); + while (rbits < 16) { + *red |= *red >> rbits; + rbits <<= 1; + } + } else + *red = 0; - *green = ((pixel >> gshift) & ((1 << gbits) - 1)) << (16 - gbits); - while (gbits < 16) { - *green |= *green >> gbits; - gbits <<= 1; - } + if (gbits) { + *green = ((pixel >> gshift) & ((1 << gbits) - 1)) << (16 - gbits); + while (gbits < 16) { + *green |= *green >> gbits; + gbits <<= 1; + } + } else + *green = 0; - *blue = ((pixel >> bshift) & ((1 << bbits) - 1)) << (16 - bbits); - while (bbits < 16) { - *blue |= *blue >> bbits; - bbits <<= 1; - } + if (bbits) { + *blue = ((pixel >> bshift) & ((1 << bbits) - 1)) << (16 - bbits); + while (bbits < 16) { + *blue |= *blue >> bbits; + bbits <<= 1; + } + } else + *blue = 0; if (abits) { *alpha = |