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util: factor out and optimize C8 SMPTE color LUT 

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 the
function util_smpte_c8_gamma() to util_smpte_fill_lut(), and its first
parameter size to ncolors, to match their actual use.

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:
  - Rename util_smpte_index_gamma() to util_smpte_fill_lut(), and its
    first parameter from size to ncolors,
  - Move smpte_color_lut[] down,
  - Kill FILL_COLOR() macro,
  - Add and use EXPAND_COLOR() macro,

v3:
  - Add Acked-by,

v2:
  - Factor out smpte color LUT.
main
Geert Uytterhoeven 2022-03-03 18:03:50 +01:00
parent eb06a81e42
commit 6d9645bb3b
3 changed files with 81 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tests/modetest/modetest.c
View File

@ -1155,7 +1155,7 @@ 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_fill_lut(256, gamma_lut);
drmModeCreatePropertyBlob(dev->fd, gamma_lut, sizeof(gamma_lut), &blob_id);
} else {
/*

120
tests/util/pattern.c
View File

@ -605,6 +605,73 @@ 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 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,
};
#define EXPAND_COLOR(r, g, b) { (r) * 0x101, (g) * 0x101, (b) * 0x101 }
static const struct drm_color_lut smpte_color_lut[] = {
[SMPTE_COLOR_GREY] = EXPAND_COLOR(192, 192, 192),
[SMPTE_COLOR_YELLOW] = EXPAND_COLOR(192, 192, 0),
[SMPTE_COLOR_CYAN] = EXPAND_COLOR( 0, 192, 192),
[SMPTE_COLOR_GREEN] = EXPAND_COLOR( 0, 192, 0),
[SMPTE_COLOR_MAGENTA] = EXPAND_COLOR(192, 0, 192),
[SMPTE_COLOR_RED] = EXPAND_COLOR(192, 0, 0),
[SMPTE_COLOR_BLUE] = EXPAND_COLOR( 0, 0, 192),
[SMPTE_COLOR_BLACK] = EXPAND_COLOR( 19, 19, 19),
[SMPTE_COLOR_IN_PHASE] = EXPAND_COLOR( 0, 33, 76),
[SMPTE_COLOR_SUPER_WHITE] = EXPAND_COLOR(255, 255, 255),
[SMPTE_COLOR_QUADRATURE] = EXPAND_COLOR( 50, 0, 106),
[SMPTE_COLOR_3PC5] = EXPAND_COLOR( 9, 9, 9),
[SMPTE_COLOR_11PC5] = EXPAND_COLOR( 29, 29, 29),
};
#undef EXPAND_COLOR
static void fill_smpte_c8(void *mem, unsigned int width, unsigned int height,
unsigned int stride)
{
@ -613,69 +680,40 @@ 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_fill_lut(unsigned int ncolors, struct drm_color_lut *lut)
{
if (size < 7 + 7 + 8) {
printf("Error: gamma too small: %d < %d\n", size, 7 + 7 + 8);
if (ncolors < ARRAY_SIZE(smpte_color_lut)) {
printf("Error: lut too small: %u < %zu\n", ncolors,
ARRAY_SIZE(smpte_color_lut));
return;
}
memset(lut, 0, size * sizeof(struct drm_color_lut));
memset(lut, 0, ncolors * sizeof(struct drm_color_lut));
#define FILL_COLOR(idx, r, g, b) \
lut[idx].red = (r) * 0x101; \
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 */
#undef FILL_COLOR
memcpy(lut, smpte_color_lut, sizeof(smpte_color_lut));
}
static void fill_smpte(const struct util_format_info *info, void *planes[3],

2
tests/util/pattern.h
View File

@ -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_fill_lut(unsigned int ncolors, struct drm_color_lut *lut);
enum util_fill_pattern util_pattern_enum(const char *name);