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-rw-r--r--libkmstest/testpat.cpp57
1 files changed, 57 insertions, 0 deletions
diff --git a/libkmstest/testpat.cpp b/libkmstest/testpat.cpp
index b0b67a4..f9cf907 100644
--- a/libkmstest/testpat.cpp
+++ b/libkmstest/testpat.cpp
@@ -87,6 +87,48 @@ static void draw_yuv422_macropixel(DumbFramebuffer& buf, unsigned x, unsigned y,
}
}
+static void draw_yuv420_macropixel(DumbFramebuffer& buf, unsigned x, unsigned y,
+ YUV yuv1, YUV yuv2, YUV yuv3, YUV yuv4)
+{
+ ASSERT((x & 1) == 0);
+ ASSERT((y & 1) == 0);
+
+ uint8_t *py1 = (uint8_t*)(buf.map(0) + buf.stride(0) * (y + 0) + x);
+ uint8_t *py2 = (uint8_t*)(buf.map(0) + buf.stride(0) * (y + 1) + x);
+
+ uint8_t *puv = (uint8_t*)(buf.map(1) + buf.stride(1) * (y / 2) + x);
+
+ uint8_t y0 = yuv1.y;
+ uint8_t y1 = yuv2.y;
+ uint8_t y2 = yuv3.y;
+ uint8_t y3 = yuv4.y;
+ uint8_t u = (yuv1.u + yuv2.u + yuv3.u + yuv4.u) / 4;
+ uint8_t v = (yuv1.v + yuv2.v + yuv3.v + yuv4.v) / 4;
+
+ switch (buf.format()) {
+ case PixelFormat::NV12:
+ py1[0] = y0;
+ py1[1] = y1;
+ py2[0] = y2;
+ py2[1] = y3;
+ puv[0] = u;
+ puv[1] = v;
+ break;
+
+ case PixelFormat::NV21:
+ py1[0] = y0;
+ py1[1] = y1;
+ py2[0] = y2;
+ py2[1] = y3;
+ puv[0] = v;
+ puv[1] = u;
+ break;
+
+ default:
+ throw std::invalid_argument("invalid pixelformat");
+ }
+}
+
static RGB get_test_pattern_pixel(DumbFramebuffer& fb, unsigned x, unsigned y)
{
unsigned w = fb.width();
@@ -184,6 +226,21 @@ static void draw_test_pattern_impl(DumbFramebuffer& fb)
}
}
break;
+
+ case PixelFormat::NV12:
+ case PixelFormat::NV21:
+ for (y = 0; y < h; y += 2) {
+ for (x = 0; x < w; x += 2) {
+ RGB pixel00 = get_test_pattern_pixel(fb, x, y);
+ RGB pixel10 = get_test_pattern_pixel(fb, x + 1, y);
+ RGB pixel01 = get_test_pattern_pixel(fb, x, y + 1);
+ RGB pixel11 = get_test_pattern_pixel(fb, x + 1, y + 1);
+ draw_yuv420_macropixel(fb, x, y,
+ pixel00.yuv(), pixel10.yuv(),
+ pixel01.yuv(), pixel11.yuv());
+ }
+ }
+ break;
default:
throw std::invalid_argument("unknown pixelformat");
}