Add support for drawing the SMPTE pattern in a buffer using the C4
indexed format.
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
v3:
- Add Acked-by,
v2:
- Use new smpte_top[],
- Split off changes to tests/util/pattern.c.
---
tests/util/pattern.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/tests/util/pattern.c b/tests/util/pattern.c
index 2132515681162d0f..c6e52d6666cda225 100644
--- a/tests/util/pattern.c
+++ b/tests/util/pattern.c
@@ -668,6 +668,46 @@ static unsigned int smpte_bottom[8] = {
SMPTE_COLOR_BLACK,
};
+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)
{
@@ -726,6 +766,8 @@ 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:
--
2.34.1
