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util: fix 16 bpp patterns on big-endian 

DRM formats are defined to be little-endian, unless the
DRM_FORMAT_BIG_ENDIAN flag is set.  Hence writes of multi-byte pixel
values need to take endianness into account.

Introduce a swap16() helper to byteswap 16-bit values, and a
cpu_to_le16() helper to convert 16-bit values from CPU-endian to
little-endian, and use the latter in the various pattern fill functions
for 16-bit formats.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
v5:
  - Add Reviewed-by,

v4:
  - No changes,

v3:
  - Increase indentation after definition of cpu_to_le16(),

v2:
  - New.
main
Geert Uytterhoeven 2022-03-03 17:58:08 +01:00 committed by Dmitry Baryshkov
parent 8cb6d837cc
commit 1b8d0e5ccd
1 changed files with 14 additions and 7 deletions
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21
tests/util/pattern.c
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@ -61,6 +61,11 @@ struct color_yuv {
.u = MAKE_YUV_601_U(r, g, b), \
.v = MAKE_YUV_601_V(r, g, b) }
static inline uint16_t swap16(uint16_t x)
{
return ((x & 0x00ffU) << 8) | ((x & 0xff00U) >> 8);
}
static inline uint32_t swap32(uint32_t x)
{
return ((x & 0x000000ffU) << 24) |
@ -70,8 +75,10 @@ static inline uint32_t swap32(uint32_t x)
}
#ifdef HAVE_BIG_ENDIAN
#define cpu_to_le16(x) swap16(x)
#define cpu_to_le32(x) swap32(x)
#else
#define cpu_to_le16(x) (x)
#define cpu_to_le32(x) (x)
#endif
@ -552,26 +559,26 @@ static void fill_smpte_rgb16(const struct util_rgb_info *rgb, void *mem,
for (y = 0; y < height * 6 / 9; ++y) {
for (x = 0; x < width; ++x)
((uint16_t *)mem)[x] = colors_top[x * 7 / width];
((uint16_t *)mem)[x] = cpu_to_le16(colors_top[x * 7 / width]);
mem += stride;
}
for (; y < height * 7 / 9; ++y) {
for (x = 0; x < width; ++x)
((uint16_t *)mem)[x] = colors_middle[x * 7 / width];
((uint16_t *)mem)[x] = cpu_to_le16(colors_middle[x * 7 / width]);
mem += stride;
}
for (; y < height; ++y) {
for (x = 0; x < width * 5 / 7; ++x)
((uint16_t *)mem)[x] =
colors_bottom[x * 4 / (width * 5 / 7)];
cpu_to_le16(colors_bottom[x * 4 / (width * 5 / 7)]);
for (; x < width * 6 / 7; ++x)
((uint16_t *)mem)[x] =
colors_bottom[(x - width * 5 / 7) * 3
/ (width / 7) + 4];
cpu_to_le16(colors_bottom[(x - width * 5 / 7) * 3
/ (width / 7) + 4]);
for (; x < width; ++x)
((uint16_t *)mem)[x] = colors_bottom[7];
((uint16_t *)mem)[x] = cpu_to_le16(colors_bottom[7]);
mem += stride;
}
}
@ -1472,7 +1479,7 @@ static void fill_tiles_rgb16(const struct util_format_info *info, void *mem,
(rgb32 >> 8) & 0xff, rgb32 & 0xff,
255);
((uint16_t *)mem)[x] = color;
((uint16_t *)mem)[x] = cpu_to_le16(color);
}
mem += stride;
}