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implement getWidth4FB_HW_ACC in fb_accel class

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This helper to determine alignment for hardware blitting is now in
system/helpers.h, where it does not really belong. Put it into the
framebuffer class instead. Framebuffers that don't need it will just
get a dummy function, the cs_hd2 framebuffer gets the real thing.
Also add a bool function that indicates the need for alignment.
This commit is contained in:
Stefan Seyfried
2017-02-14 00:09:33 +01:00
committed by M. Liebmann
parent 7fdc4c7178
commit b6909fb815
4 changed files with 27 additions and 2 deletions
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17
src/driver/fb_accel_cs_hd2.cpp
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@@ -228,3 +228,20 @@ void CFbAccelCSHD2::setBlendLevel(int level)
if (level == 100) // TODO: sucks.
usleep(20000);
}
/* align for hw blit */
uint32_t CFbAccelCSHD2::getWidth4FB_HW_ACC(const uint32_t _x, const uint32_t _w, const bool max)
{
uint32_t ret = _w;
if ((_x + ret) >= xRes)
ret = xRes-_x-1;
if (ret%4 == 0)
return ret;
int add = (max) ? 3 : 0;
ret = ((ret + add) / 4) * 4;
if ((_x + ret) >= xRes)
ret -= 4;
return ret;
}