Add support for drawing the SMPTE pattern in a buffer using the C2 indexed format.
As only four colors are available, resolution is halved, and the pattern is drawn in a PenTile RG-GB matrix, using Floyd-Steinberg dithering. The magnitude of the green subpixels is reduced, as there are twice as many green subpixels as red or blue subpixels. Signed-off-by: Geert Uytterhoeven <[email protected]> --- v2: - New. --- tests/util/pattern.c | 97 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 96 insertions(+), 1 deletion(-) diff --git a/tests/util/pattern.c b/tests/util/pattern.c index 5ec7d66495209df4..a5c4e31ad856709e 100644 --- a/tests/util/pattern.c +++ b/tests/util/pattern.c @@ -825,6 +825,93 @@ static void fill_smpte_c1(void *mem, unsigned int width, unsigned int height, free(fsd); } + +static void write_pixel_2(uint8_t *mem, unsigned int x, unsigned int pixel) +{ + unsigned int shift = 6 - 2 * (x & 3); + unsigned int mask = 3U << shift; + + mem[x / 4] = (mem[x / 4] & ~mask) | ((pixel << shift) & mask); +} + +static void write_color_2(struct fsd *fsd, uint8_t *mem, unsigned int stride, + unsigned int x, unsigned int index) +{ + struct drm_color_lut color = smpte_color_lut[index]; + unsigned int r, g, b; + + fsd_dither(fsd, &color); + + if (color.red >= 32768) { + r = 1; + color.red = 65535; + } else { + r = 0; + color.red = 0; + } + if (color.green >= 32768) { + g = 2; + color.green = 65535; + } else { + g = 0; + color.green = 0; + } + if (color.blue >= 32768) { + b = 3; + color.blue = 65535; + } else { + b = 0; + color.blue = 0; + } + + fsd_update(fsd, &color); + + /* Use PenTile RG-GB */ + write_pixel_2(mem, 2 * x, r); + write_pixel_2(mem, 2 * x + 1, g); + write_pixel_2(mem + stride, 2 * x, g); + write_pixel_2(mem + stride, 2 * x + 1, b); +} + +static void fill_smpte_c2(void *mem, unsigned int width, unsigned int height, + unsigned int stride) +{ + struct fsd *fsd = fsd_alloc(width); + unsigned int x; + unsigned int y; + + /* Half resolution for PenTile RG-GB */ + width /= 2; + height /= 2; + + for (y = 0; y < height * 6 / 9; ++y) { + for (x = 0; x < width; ++x) + write_color_2(fsd, mem, stride, x, smpte_top[x * 7 / width]); + mem += 2 * stride; + } + + for (; y < height * 7 / 9; ++y) { + for (x = 0; x < width; ++x) + write_color_2(fsd, mem, stride, x, smpte_middle[x * 7 / width]); + mem += 2 * stride; + } + + for (; y < height; ++y) { + for (x = 0; x < width * 5 / 7; ++x) + write_color_2(fsd, mem, stride, x, + smpte_bottom[x * 4 / (width * 5 / 7)]); + for (; x < width * 6 / 7; ++x) + write_color_2(fsd, mem, stride, x, + smpte_bottom[(x - width * 5 / 7) * 3 / + (width / 7) + 4]); + for (; x < width; ++x) + write_color_2(fsd, mem, stride, x, smpte_bottom[7]); + mem += 2 * stride; + } + + free(fsd); +} + static void write_pixel_4(uint8_t *mem, unsigned int x, unsigned int pixel) { if (x & 1) @@ -910,9 +997,15 @@ void util_smpte_index_gamma(unsigned size, struct drm_color_lut *lut) lut[idx].green = (g) * 0x101; \ lut[idx].blue = (b) * 0x101 - if (size < ARRAY_SIZE(smpte_color_lut)) { + if (size < 4) { FILL_COLOR(0, 0, 0, 0 ); /* black */ FILL_COLOR(1, 255, 255, 255); /* white */ + } else if (size < ARRAY_SIZE(smpte_color_lut)) { + /* PenTile RG-GB */ + FILL_COLOR(0, 0, 0, 0 ); /* black */ + FILL_COLOR(1, 255, 0, 0 ); /* red */ + FILL_COLOR(2, 0, 207, 0 ); /* green */ + FILL_COLOR(3, 0, 0, 255); /* blue */ } else { memcpy(lut, smpte_color_lut, sizeof(smpte_color_lut)); } @@ -929,6 +1022,8 @@ static void fill_smpte(const struct util_format_info *info, void *planes[3], switch (info->format) { case DRM_FORMAT_C1: return fill_smpte_c1(planes[0], width, height, stride); + case DRM_FORMAT_C2: + return fill_smpte_c2(planes[0], width, height, stride); case DRM_FORMAT_C4: return fill_smpte_c4(planes[0], width, height, stride); case DRM_FORMAT_C8: -- 2.25.1
