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util: add SMPTE pattern support for C4 format 

Add support for drawing the SMPTE pattern in a buffer using the C4
indexed format.

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

v4:
  - No changes,

v3:
  - Add Acked-by,

v2:
  - Use new smpte_top[],
  - Split off changes to tests/util/pattern.c.
main
Geert Uytterhoeven 2022-03-03 18:17:27 +01:00
parent 8134deb31f
commit 15c6657617
1 changed files with 42 additions and 0 deletions
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42
tests/util/pattern.c
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@ -672,6 +672,46 @@ static const struct drm_color_lut smpte_color_lut[] = {
#undef EXPAND_COLOR
static void write_pixel_4(uint8_t *mem, unsigned int x, unsigned int pixel)
{
if (x & 1)
mem[x / 2] = (mem[x / 2] & 0xf0) | (pixel & 0x0f);
else
mem[x / 2] = (mem[x / 2] & 0x0f) | (pixel << 4);
}
static void fill_smpte_c4(void *mem, unsigned int width, unsigned int height,
unsigned int stride)
{
unsigned int x;
unsigned int y;
for (y = 0; y < height * 6 / 9; ++y) {
for (x = 0; x < width; ++x)
write_pixel_4(mem, x, smpte_top[x * 7 / width]);
mem += stride;
}
for (; y < height * 7 / 9; ++y) {
for (x = 0; x < width; ++x)
write_pixel_4(mem, x, smpte_middle[x * 7 / width]);
mem += stride;
}
for (; y < height; ++y) {
for (x = 0; x < width * 5 / 7; ++x)
write_pixel_4(mem, x,
smpte_bottom[x * 4 / (width * 5 / 7)]);
for (; x < width * 6 / 7; ++x)
write_pixel_4(mem, x,
smpte_bottom[(x - width * 5 / 7) * 3 /
(width / 7) + 4]);
for (; x < width; ++x)
write_pixel_4(mem, x, smpte_bottom[7]);
mem += stride;
}
}
static void fill_smpte_c8(void *mem, unsigned int width, unsigned int height,
unsigned int stride)
{
@ -723,6 +763,8 @@ static void fill_smpte(const struct util_format_info *info, void *planes[3],
unsigned char *u, *v;
switch (info->format) {
case DRM_FORMAT_C4:
return fill_smpte_c4(planes[0], width, height, stride);
case DRM_FORMAT_C8:
return fill_smpte_c8(planes[0], width, height, stride);
case DRM_FORMAT_UYVY: