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fb_accel_sti: fix blit2FB for source/dest offsets

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This commit is contained in:
Stefan Seyfried
2018-02-25 00:09:27 +01:00
committed by Thilo Graf
parent b59478cbf3
commit cbe982c12e
1 changed files with 8 additions and 4 deletions
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12
src/driver/fb_accel_sti.cpp
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@@ -3,7 +3,7 @@
The hardware dependent framebuffer acceleration functions for STi chips
are represented in this class.
(C) 2017 Stefan Seyfried
(C) 2017-2018 Stefan Seyfried
License: GPL
@@ -278,15 +278,19 @@ void CFbAccelSTi::paintRect(const int x, const int y, const int dx, const int dy
blit();
}
/* width / height => source surface *
* xoff / yoff => target position *
* xp / yp => offset in source */
void CFbAccelSTi::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32_t xoff, uint32_t yoff, uint32_t xp, uint32_t yp, bool transp)
{
int x, y, dw, dh;
int x, y, dw, dh, bottom;
x = xoff;
y = yoff;
dw = width - xp;
dh = height - yp;
bottom = height + yp;
size_t mem_sz = width * height * sizeof(fb_pixel_t);
size_t mem_sz = width * bottom * 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;
@@ -307,7 +311,7 @@ void CFbAccelSTi::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32_
blt_data.src_left = xp;
blt_data.src_top = yp;
blt_data.src_right = width;
blt_data.src_bottom = height;
blt_data.src_bottom = bottom;
blt_data.dst_left = x;
blt_data.dst_top = y;
blt_data.dst_right = x + dw;