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fb_generic: add swidth variable, "stride in fb_pixel_t units"

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this should allow to use fb_pixel_t pointer arithmetics more often
instead of byte pointers


Origin commit data
------------------
Commit: a6fc59ad6c
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2017-02-15 (Wed, 15 Feb 2017)
This commit is contained in:
Stefan Seyfried
2017-02-15 20:30:52 +01:00
parent 2369bc3cd6
commit 4dfb003fe5
8 changed files with 12 additions and 9 deletions
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3
src/driver/fb_accel_glfb.cpp
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@@ -54,6 +54,7 @@ void CFbAccelGLFB::init(const char *)
}
screeninfo = glfb->getScreenInfo();
stride = 4 * screeninfo.xres;
swidth = screeninfo.xres;
available = glfb->getOSDBuffer()->size(); /* allocated in glfb constructor */
lbb = lfb = reinterpret_cast<fb_pixel_t*>(glfb->getOSDBuffer()->data());
@@ -135,7 +136,7 @@ int CFbAccelGLFB::setMode(unsigned int, unsigned int, unsigned int)
int needmem = stride * yRes * 2;
if (available >= needmem)
{
backbuffer = lfb + stride / sizeof(fb_pixel_t) * yRes;
backbuffer = lfb + swidth * yRes;
return 0;
}
fprintf(stderr, LOGTAG " not enough FB memory (have %d, need %d)\n", available, needmem);