[PATCH libdrm v2 02/10] util: Factor out and optimize C8 SMPTE color LUT
Geert Uytterhoeven
geert at linux-m68k.org
Fri Jul 8 18:21:32 UTC 2022
The color LUT for the SMPTE pattern in indexed mode contains 22 entries,
although only 13 are non-unique.
Reduce the size of the color LUT by dropping duplicate entries, so it
can be reused for formats supporting e.g. 16 colors. Rename
util_smpte_c8_gamma() to util_smpte_index_gamma() accordingly.
Signed-off-by: Geert Uytterhoeven <geert at linux-m68k.org>
---
v2:
- Factor out smpte color LUT.
---
tests/modetest/modetest.c | 2 +-
tests/util/pattern.c | 107 ++++++++++++++++++++++++++------------
tests/util/pattern.h | 2 +-
3 files changed, 76 insertions(+), 35 deletions(-)
diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
index 9ceb5688f7683ffc..11a39ada80579293 100644
--- a/tests/modetest/modetest.c
+++ b/tests/modetest/modetest.c
@@ -1135,7 +1135,7 @@ static void set_gamma(struct device *dev, unsigned crtc_id, unsigned fourcc)
if (fourcc == DRM_FORMAT_C8) {
/* TODO: Add C8 support for more patterns */
- util_smpte_c8_gamma(256, gamma_lut);
+ util_smpte_index_gamma(256, gamma_lut);
drmModeCreatePropertyBlob(dev->fd, gamma_lut, sizeof(gamma_lut), &blob_id);
} else {
for (i = 0; i < 256; i++) {
diff --git a/tests/util/pattern.c b/tests/util/pattern.c
index 3753ebc1eeae6c9a..5a648b468e524fbb 100644
--- a/tests/util/pattern.c
+++ b/tests/util/pattern.c
@@ -605,6 +605,69 @@ static void fill_smpte_rgb16fp(const struct util_rgb_info *rgb, void *mem,
}
}
+enum smpte_colors {
+ SMPTE_COLOR_GREY,
+ SMPTE_COLOR_YELLOW,
+ SMPTE_COLOR_CYAN,
+ SMPTE_COLOR_GREEN,
+ SMPTE_COLOR_MAGENTA,
+ SMPTE_COLOR_RED,
+ SMPTE_COLOR_BLUE,
+ SMPTE_COLOR_BLACK,
+ SMPTE_COLOR_IN_PHASE,
+ SMPTE_COLOR_SUPER_WHITE,
+ SMPTE_COLOR_QUADRATURE,
+ SMPTE_COLOR_3PC5,
+ SMPTE_COLOR_11PC5,
+};
+
+static const struct drm_color_lut smpte_color_lut[] = {
+ [SMPTE_COLOR_GREY] = { 192 * 0x101, 192 * 0x101, 192 * 0x101 },
+ [SMPTE_COLOR_YELLOW] = { 192 * 0x101, 192 * 0x101, 0 * 0x101 },
+ [SMPTE_COLOR_CYAN] = { 0 * 0x101, 192 * 0x101, 192 * 0x101 },
+ [SMPTE_COLOR_GREEN] = { 0 * 0x101, 192 * 0x101, 0 * 0x101 },
+ [SMPTE_COLOR_MAGENTA] = { 192 * 0x101, 0 * 0x101, 192 * 0x101 },
+ [SMPTE_COLOR_RED] = { 192 * 0x101, 0 * 0x101, 0 * 0x101 },
+ [SMPTE_COLOR_BLUE] = { 0 * 0x101, 0 * 0x101, 192 * 0x101 },
+ [SMPTE_COLOR_BLACK] = { 19 * 0x101, 19 * 0x101, 19 * 0x101 },
+ [SMPTE_COLOR_IN_PHASE] = { 0 * 0x101, 33 * 0x101, 76 * 0x101 },
+ [SMPTE_COLOR_SUPER_WHITE] = { 255 * 0x101, 255 * 0x101, 255 * 0x101 },
+ [SMPTE_COLOR_QUADRATURE] = { 50 * 0x101, 0 * 0x101, 106 * 0x101 },
+ [SMPTE_COLOR_3PC5] = { 9 * 0x101, 9 * 0x101, 9 * 0x101 },
+ [SMPTE_COLOR_11PC5] = { 29 * 0x101, 29 * 0x101, 29 * 0x101 },
+};
+
+static unsigned int smpte_top[7] = {
+ SMPTE_COLOR_GREY,
+ SMPTE_COLOR_YELLOW,
+ SMPTE_COLOR_CYAN,
+ SMPTE_COLOR_GREEN,
+ SMPTE_COLOR_MAGENTA,
+ SMPTE_COLOR_RED,
+ SMPTE_COLOR_BLUE,
+};
+
+static unsigned int smpte_middle[7] = {
+ SMPTE_COLOR_BLUE,
+ SMPTE_COLOR_BLACK,
+ SMPTE_COLOR_MAGENTA,
+ SMPTE_COLOR_BLACK,
+ SMPTE_COLOR_CYAN,
+ SMPTE_COLOR_BLACK,
+ SMPTE_COLOR_GREY,
+};
+
+static unsigned int smpte_bottom[8] = {
+ SMPTE_COLOR_IN_PHASE,
+ SMPTE_COLOR_SUPER_WHITE,
+ SMPTE_COLOR_QUADRATURE,
+ SMPTE_COLOR_BLACK,
+ SMPTE_COLOR_3PC5,
+ SMPTE_COLOR_BLACK,
+ SMPTE_COLOR_11PC5,
+ SMPTE_COLOR_BLACK,
+};
+
static void fill_smpte_c8(void *mem, unsigned int width, unsigned int height,
unsigned int stride)
{
@@ -613,34 +676,35 @@ static void fill_smpte_c8(void *mem, unsigned int width, unsigned int height,
for (y = 0; y < height * 6 / 9; ++y) {
for (x = 0; x < width; ++x)
- ((uint8_t *)mem)[x] = x * 7 / width;
+ ((uint8_t *)mem)[x] = smpte_top[x * 7 / width];
mem += stride;
}
for (; y < height * 7 / 9; ++y) {
for (x = 0; x < width; ++x)
- ((uint8_t *)mem)[x] = 7 + (x * 7 / width);
+ ((uint8_t *)mem)[x] = smpte_middle[x * 7 / width];
mem += stride;
}
for (; y < height; ++y) {
for (x = 0; x < width * 5 / 7; ++x)
((uint8_t *)mem)[x] =
- 14 + (x * 4 / (width * 5 / 7));
+ smpte_bottom[x * 4 / (width * 5 / 7)];
for (; x < width * 6 / 7; ++x)
((uint8_t *)mem)[x] =
- 14 + ((x - width * 5 / 7) * 3
- / (width / 7) + 4);
+ smpte_bottom[(x - width * 5 / 7) * 3
+ / (width / 7) + 4];
for (; x < width; ++x)
- ((uint8_t *)mem)[x] = 14 + 7;
+ ((uint8_t *)mem)[x] = smpte_bottom[7];
mem += stride;
}
}
-void util_smpte_c8_gamma(unsigned size, struct drm_color_lut *lut)
+void util_smpte_index_gamma(unsigned size, struct drm_color_lut *lut)
{
- if (size < 7 + 7 + 8) {
- printf("Error: gamma too small: %d < %d\n", size, 7 + 7 + 8);
+ if (size < ARRAY_SIZE(smpte_color_lut)) {
+ printf("Error: gamma too small: %u < %zu\n", size,
+ ARRAY_SIZE(smpte_color_lut));
return;
}
memset(lut, 0, size * sizeof(struct drm_color_lut));
@@ -650,30 +714,7 @@ void util_smpte_c8_gamma(unsigned size, struct drm_color_lut *lut)
lut[idx].green = (g) * 0x101; \
lut[idx].blue = (b) * 0x101
- FILL_COLOR( 0, 192, 192, 192); /* grey */
- FILL_COLOR( 1, 192, 192, 0 ); /* yellow */
- FILL_COLOR( 2, 0, 192, 192); /* cyan */
- FILL_COLOR( 3, 0, 192, 0 ); /* green */
- FILL_COLOR( 4, 192, 0, 192); /* magenta */
- FILL_COLOR( 5, 192, 0, 0 ); /* red */
- FILL_COLOR( 6, 0, 0, 192); /* blue */
-
- FILL_COLOR( 7, 0, 0, 192); /* blue */
- FILL_COLOR( 8, 19, 19, 19 ); /* black */
- FILL_COLOR( 9, 192, 0, 192); /* magenta */
- FILL_COLOR(10, 19, 19, 19 ); /* black */
- FILL_COLOR(11, 0, 192, 192); /* cyan */
- FILL_COLOR(12, 19, 19, 19 ); /* black */
- FILL_COLOR(13, 192, 192, 192); /* grey */
-
- FILL_COLOR(14, 0, 33, 76); /* in-phase */
- FILL_COLOR(15, 255, 255, 255); /* super white */
- FILL_COLOR(16, 50, 0, 106); /* quadrature */
- FILL_COLOR(17, 19, 19, 19); /* black */
- FILL_COLOR(18, 9, 9, 9); /* 3.5% */
- FILL_COLOR(19, 19, 19, 19); /* 7.5% */
- FILL_COLOR(20, 29, 29, 29); /* 11.5% */
- FILL_COLOR(21, 19, 19, 19); /* black */
+ memcpy(lut, smpte_color_lut, sizeof(smpte_color_lut));
#undef FILL_COLOR
}
diff --git a/tests/util/pattern.h b/tests/util/pattern.h
index ea38cafdcf27d811..d178bca69b227751 100644
--- a/tests/util/pattern.h
+++ b/tests/util/pattern.h
@@ -39,7 +39,7 @@ void util_fill_pattern(uint32_t format, enum util_fill_pattern pattern,
void *planes[3], unsigned int width,
unsigned int height, unsigned int stride);
-void util_smpte_c8_gamma(unsigned size, struct drm_color_lut *lut);
+void util_smpte_index_gamma(unsigned size, struct drm_color_lut *lut);
enum util_fill_pattern util_pattern_enum(const char *name);
--
2.25.1
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