diff options
Diffstat (limited to 'meta/recipes-graphics/xorg-lib/pixman/0002-Generic-C-implementation-of-pixman_blt-with-overlapp.patch')
| -rw-r--r-- | meta/recipes-graphics/xorg-lib/pixman/0002-Generic-C-implementation-of-pixman_blt-with-overlapp.patch | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/meta/recipes-graphics/xorg-lib/pixman/0002-Generic-C-implementation-of-pixman_blt-with-overlapp.patch b/meta/recipes-graphics/xorg-lib/pixman/0002-Generic-C-implementation-of-pixman_blt-with-overlapp.patch new file mode 100644 index 0000000000..abd501a106 --- /dev/null +++ b/meta/recipes-graphics/xorg-lib/pixman/0002-Generic-C-implementation-of-pixman_blt-with-overlapp.patch @@ -0,0 +1,127 @@ +From 211b2bcdb19f86f3868a18520df7dcb4fd122f05 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@googlemail.com> +Date: Sun, 19 Aug 2012 14:48:00 +0200 +Subject: [PATCH 2/2] Generic C implementation of pixman_blt with overlapping + support +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This was ported from meta-oe's patch [1]: +Uses memcpy/memmove functions to copy pixels, can handle the +case when both source and destination areas are in the same +image (this is useful for scrolling). + +It is assumed that copying direction is only important when +using the same image for both source and destination (and +src_stride == dst_stride). Copying direction is undefined +for the images with different source and destination stride +which happen to be in the overlapped areas (but this is an +unrealistic case anyway). + +[1] http://cgit.openembedded.org/meta-openembedded/tree/meta-oe/recipes-graphics/xorg-lib/pixman-0.26.2/0008-Generic-C-implementation-of-pixman_blt-with-overlapp.patch + +Upstream-Status: Unknown - this patch is in meta-oe for a while + +Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com> +--- + pixman/pixman-general.c | 21 ++++++++++++++++++--- + pixman/pixman-private.h | 43 +++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 61 insertions(+), 3 deletions(-) + +diff --git a/pixman/pixman-general.c b/pixman/pixman-general.c +index d4b2daa..a86b206 100644 +--- a/pixman/pixman-general.c ++++ b/pixman/pixman-general.c +@@ -215,9 +215,24 @@ general_blt (pixman_implementation_t *imp, + int width, + int height) + { +- /* We can't blit unless we have sse2 or mmx */ +- +- return FALSE; ++ uint8_t *dst_bytes = (uint8_t *)dst_bits; ++ uint8_t *src_bytes = (uint8_t *)src_bits; ++ int bpp; ++ ++ if (src_bpp != dst_bpp || src_bpp & 7) ++ return FALSE; ++ ++ bpp = src_bpp >> 3; ++ width *= bpp; ++ src_stride *= 4; ++ dst_stride *= 4; ++ pixman_blt_helper (src_bytes + src_y * src_stride + src_x * bpp, ++ dst_bytes + dest_y * dst_stride + dest_x * bpp, ++ src_stride, ++ dst_stride, ++ width, ++ height); ++ return TRUE; + } + + static pixman_bool_t +diff --git a/pixman/pixman-private.h b/pixman/pixman-private.h +index d5e6a72..c77d256 100644 +--- a/pixman/pixman-private.h ++++ b/pixman/pixman-private.h +@@ -24,6 +24,7 @@ + + #include "pixman.h" + #include <time.h> ++#include <string.h> + #include <assert.h> + #include <stdio.h> + #include <string.h> +@@ -1096,6 +1097,48 @@ void pixman_timer_register (pixman_timer_t *timer); + extern const uint8_t linear_to_srgb[4096]; + extern const uint16_t srgb_to_linear[256]; + ++/* a helper function, can blit 8-bit images with src/dst overlapping support */ ++static inline void ++pixman_blt_helper (uint8_t *src_bytes, ++ uint8_t *dst_bytes, ++ int src_stride, ++ int dst_stride, ++ int width, ++ int height) ++{ ++ /* ++ * The second part of this check is not strictly needed, but it prevents ++ * unnecessary upside-down processing of areas which belong to different ++ * images. Upside-down processing can be slower with fixed-distance-ahead ++ * prefetch and perceived as having more tearing. ++ */ ++ if (src_bytes < dst_bytes + width && ++ src_bytes + src_stride * height > dst_bytes) ++ { ++ src_bytes += src_stride * height - src_stride; ++ dst_bytes += dst_stride * height - dst_stride; ++ dst_stride = -dst_stride; ++ src_stride = -src_stride; ++ /* Horizontal scrolling to the left needs memmove */ ++ if (src_bytes + width > dst_bytes) ++ { ++ while (--height >= 0) ++ { ++ memmove (dst_bytes, src_bytes, width); ++ dst_bytes += dst_stride; ++ src_bytes += src_stride; ++ } ++ return; ++ } ++ } ++ while (--height >= 0) ++ { ++ memcpy (dst_bytes, src_bytes, width); ++ dst_bytes += dst_stride; ++ src_bytes += src_stride; ++ } ++} ++ + #endif /* __ASSEMBLER__ */ + + #endif /* PIXMAN_PRIVATE_H */ +-- +1.7.4.4 + |