[PATCH libdrm v2 07/10] util: Add test pattern support for big-endian XRGB1555/RGB565

[Geert Uytterhoeven]

Add support for drawing the SMPTE and tiles test patterns in buffers
using big-endian formats.

For now this is limited to XRGB1555 and RGB565, which are the most
common big-endian formats.

Signed-off-by: Geert Uytterhoeven <geert at linux-m68k.org>
---
v2:
  - New.
---
 tests/util/pattern.c | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/tests/util/pattern.c b/tests/util/pattern.c
index c0bd382fbced90fb..e693892bb3cf93c1 100644
--- a/tests/util/pattern.c
+++ b/tests/util/pattern.c
@@ -23,6 +23,7 @@
  * IN THE SOFTWARE.
  */
 
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -75,13 +76,17 @@ static inline uint32_t swap32(uint32_t x)
 }
 
 #if defined(__BIG_ENDIAN__) || defined(__ARM_BIG_ENDIAN) || defined(__mc68000__) || defined(__MIPSEB__) || defined(__s390__) || defined(__sparc__)
+#define cpu_to_be16(x)	(x)
 #define cpu_to_le16(x)	swap16(x)
 #define cpu_to_le32(x)	swap32(x)
 #else
+#define cpu_to_be16(x)	swap16(x)
 #define cpu_to_le16(x)	(x)
 #define cpu_to_le32(x)	(x)
 #endif
 
+#define cpu_to_fb16(x)	(fb_be ? cpu_to_be16(x) : cpu_to_le16(x))
+
 /* This function takes 8-bit color values */
 static inline uint32_t shiftcolor8(const struct util_color_component *comp,
 				  uint32_t value)
@@ -382,7 +387,7 @@ static void fill_smpte_yuv_packed(const struct util_yuv_info *yuv, void *mem,
 
 static void fill_smpte_rgb16(const struct util_rgb_info *rgb, void *mem,
 			     unsigned int width, unsigned int height,
-			     unsigned int stride)
+			     unsigned int stride, bool fb_be)
 {
 	const uint16_t colors_top[] = {
 		MAKE_RGBA(rgb, 192, 192, 192, 255),	/* grey */
@@ -417,26 +422,26 @@ static void fill_smpte_rgb16(const struct util_rgb_info *rgb, void *mem,
 
 	for (y = 0; y < height * 6 / 9; ++y) {
 		for (x = 0; x < width; ++x)
-			((uint16_t *)mem)[x] = cpu_to_le16(colors_top[x * 7 / width]);
+			((uint16_t *)mem)[x] = cpu_to_fb16(colors_top[x * 7 / width]);
 		mem += stride;
 	}
 
 	for (; y < height * 7 / 9; ++y) {
 		for (x = 0; x < width; ++x)
-			((uint16_t *)mem)[x] = cpu_to_le16(colors_middle[x * 7 / width]);
+			((uint16_t *)mem)[x] = cpu_to_fb16(colors_middle[x * 7 / width]);
 		mem += stride;
 	}
 
 	for (; y < height; ++y) {
 		for (x = 0; x < width * 5 / 7; ++x)
 			((uint16_t *)mem)[x] =
-				cpu_to_le16(colors_bottom[x * 4 / (width * 5 / 7)]);
+				cpu_to_fb16(colors_bottom[x * 4 / (width * 5 / 7)]);
 		for (; x < width * 6 / 7; ++x)
 			((uint16_t *)mem)[x] =
-				cpu_to_le16(colors_bottom[(x - width * 5 / 7) * 3
+				cpu_to_fb16(colors_bottom[(x - width * 5 / 7) * 3
 							  / (width / 7) + 4]);
 		for (; x < width; ++x)
-			((uint16_t *)mem)[x] = cpu_to_le16(colors_bottom[7]);
+			((uint16_t *)mem)[x] = cpu_to_fb16(colors_bottom[7]);
 		mem += stride;
 	}
 }
@@ -1081,9 +1086,11 @@ static void fill_smpte(const struct util_format_info *info, void *planes[3],
 	case DRM_FORMAT_BGRA4444:
 	case DRM_FORMAT_BGRX4444:
 	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN:
 	case DRM_FORMAT_BGR565:
 	case DRM_FORMAT_ARGB1555:
 	case DRM_FORMAT_XRGB1555:
+	case DRM_FORMAT_XRGB1555 | DRM_FORMAT_BIG_ENDIAN:
 	case DRM_FORMAT_ABGR1555:
 	case DRM_FORMAT_XBGR1555:
 	case DRM_FORMAT_RGBA5551:
@@ -1091,7 +1098,8 @@ static void fill_smpte(const struct util_format_info *info, void *planes[3],
 	case DRM_FORMAT_BGRA5551:
 	case DRM_FORMAT_BGRX5551:
 		return fill_smpte_rgb16(&info->rgb, planes[0],
-					width, height, stride);
+					width, height, stride,
+					info->format & DRM_FORMAT_BIG_ENDIAN);
 
 	case DRM_FORMAT_BGR888:
 	case DRM_FORMAT_RGB888:
@@ -1263,7 +1271,7 @@ static void fill_tiles_yuv_packed(const struct util_format_info *info,
 
 static void fill_tiles_rgb16(const struct util_format_info *info, void *mem,
 			     unsigned int width, unsigned int height,
-			     unsigned int stride)
+			     unsigned int stride, bool fb_be)
 {
 	const struct util_rgb_info *rgb = &info->rgb;
 	void *mem_base = mem;
@@ -1279,7 +1287,7 @@ static void fill_tiles_rgb16(const struct util_format_info *info, void *mem,
 					  (rgb32 >> 8) & 0xff, rgb32 & 0xff,
 					  255);
 
-			((uint16_t *)mem)[x] = cpu_to_le16(color);
+			((uint16_t *)mem)[x] = cpu_to_fb16(color);
 		}
 		mem += stride;
 	}
@@ -1401,9 +1409,11 @@ static void fill_tiles(const struct util_format_info *info, void *planes[3],
 	case DRM_FORMAT_BGRA4444:
 	case DRM_FORMAT_BGRX4444:
 	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN:
 	case DRM_FORMAT_BGR565:
 	case DRM_FORMAT_ARGB1555:
 	case DRM_FORMAT_XRGB1555:
+	case DRM_FORMAT_XRGB1555 | DRM_FORMAT_BIG_ENDIAN:
 	case DRM_FORMAT_ABGR1555:
 	case DRM_FORMAT_XBGR1555:
 	case DRM_FORMAT_RGBA5551:
@@ -1411,7 +1421,8 @@ static void fill_tiles(const struct util_format_info *info, void *planes[3],
 	case DRM_FORMAT_BGRA5551:
 	case DRM_FORMAT_BGRX5551:
 		return fill_tiles_rgb16(info, planes[0],
-					width, height, stride);
+					width, height, stride,
+					info->format & DRM_FORMAT_BIG_ENDIAN);
 
 	case DRM_FORMAT_BGR888:
 	case DRM_FORMAT_RGB888:
-- 
2.25.1