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stifb: make blit2FB more flexible wrt blit source

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Origin commit data
------------------
Commit: 9d6055a3ea
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2018-01-28 (Sun, 28 Jan 2018)
This commit is contained in:
Stefan Seyfried
2018-01-28 20:34:24 +01:00
committed by vanhofen
parent 179951b3e9
commit b20605afa5
1 changed files with 7 additions and 2 deletions
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9
src/driver/fb_accel_sti.cpp
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@@ -287,6 +287,11 @@ void CFbAccelSTi::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32_
dh = height - yp;
size_t mem_sz = width * height * sizeof(fb_pixel_t);
/* we can blit anything from [ backbuffer <--> backbuffer + backbuf_sz ]
* if the source is outside this, then it will be memmove()d to start of backbuffer */
void *tmpbuff = backbuffer;
if ((fbbuff >= backbuffer) && (uint8_t *)fbbuff + mem_sz <= (uint8_t *)backbuffer + backbuf_sz)
tmpbuff = fbbuff;
unsigned long ulFlags = 0;
if (!transp) /* transp == false (default): use transparency from source alphachannel */
ulFlags = BLT_OP_FLAGS_BLEND_SRC_ALPHA|BLT_OP_FLAGS_BLEND_DST_MEMORY; // we need alpha blending
@@ -309,7 +314,7 @@ void CFbAccelSTi::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32_
blt_data.dst_bottom = y + dh;
blt_data.srcFormat = SURF_ARGB8888;
blt_data.dstFormat = SURF_ARGB8888;
blt_data.srcMemBase = (char *)backbuffer;
blt_data.srcMemBase = (char *)tmpbuff;
blt_data.dstMemBase = (char *)lfb;
blt_data.srcMemSize = mem_sz;
blt_data.dstMemSize = stride * yRes + lbb_off;
@@ -317,7 +322,7 @@ void CFbAccelSTi::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32_
mark(x, y, blt_data.dst_right, blt_data.dst_bottom);
OpenThreads::ScopedLock<OpenThreads::Mutex> m_lock(mutex);
ioctl(fd, STMFBIO_SYNC_BLITTER);
if (fbbuff != backbuffer)
if (fbbuff != tmpbuff)
memmove(backbuffer, fbbuff, mem_sz);
// icons are so small that they will still be in cache
msync(backbuffer, backbuf_sz, MS_SYNC);