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fb_accel_sti: fix blit2FB for source/dest offsets

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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 The hardware dependent framebuffer acceleration functions for STi chips
are represented in this class. are represented in this class.
(C) 2017 Stefan Seyfried (C) 2017-2018 Stefan Seyfried
License: GPL License: GPL
@@ -278,15 +278,19 @@ void CFbAccelSTi::paintRect(const int x, const int y, const int dx, const int dy
blit(); 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) 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; x = xoff;
y = yoff; y = yoff;
dw = width - xp; dw = width - xp;
dh = height - yp; 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 ] /* 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 */ * if the source is outside this, then it will be memmove()d to start of backbuffer */
void *tmpbuff = 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_left = xp;
blt_data.src_top = yp; blt_data.src_top = yp;
blt_data.src_right = width; blt_data.src_right = width;
blt_data.src_bottom = height; blt_data.src_bottom = bottom;
blt_data.dst_left = x; blt_data.dst_left = x;
blt_data.dst_top = y; blt_data.dst_top = y;
blt_data.dst_right = x + dw; blt_data.dst_right = x + dw;