[Armadeus-commitlog] armadeus branch, master, updated. armadeus-6.0-270-g509b361
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[Armadeus-commitlog] armadeus branch, master, updated. armadeus-6.0-270-g509b361
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From: Julien B a. A. <ar...@us...> - 2017-04-20 11:10:03
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- Log -----------------------------------------------------------------
commit 509b361afc130b02c3f1861d2b5cbc03344fbc26
Author: Julien BOIBESSOT <jul...@ar...>
Date: Thu Apr 20 13:09:44 2017 +0200
[DEMOS] Add a small tool (fb_alpha) to play with i.MX6 framebuffer overlay/alpha channels
-----------------------------------------------------------------------
Summary of changes:
target/demos/fb_alpha/README | 5 ++
target/demos/fb_alpha/fb_alpha.c | 184 +++++++++++++++++++++++++++++++++++++++
2 files changed, 189 insertions(+)
create mode 100644 target/demos/fb_alpha/README
create mode 100644 target/demos/fb_alpha/fb_alpha.c
diff --git a/target/demos/fb_alpha/README b/target/demos/fb_alpha/README
new file mode 100644
index 0000000..e8185dd
--- /dev/null
+++ b/target/demos/fb_alpha/README
@@ -0,0 +1,5 @@
+Simple tool to play with i.MX6 framebuffer overlay/alpha.
+Requires a Freescale kernel (tested on 3.14).
+
+To compile:
+../../../buildroot/output/host/usr/bin/arm-linux-gnueabihf-gcc -o fb_alpha fb_alpha.c
diff --git a/target/demos/fb_alpha/fb_alpha.c b/target/demos/fb_alpha/fb_alpha.c
new file mode 100644
index 0000000..2c7d1c1
--- /dev/null
+++ b/target/demos/fb_alpha/fb_alpha.c
@@ -0,0 +1,184 @@
+/*
+ * Tools to play with i.MX6 framebuffer overlay and alpha channels.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h> /* uintx_t */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h> /* getopt_long() */
+
+/* #include <uapi/linux/mxcfb.h> ?? */
+#define MXCFB_SET_GBL_ALPHA _IOW('F', 0x21, struct mxcfb_gbl_alpha)
+#define MXCFB_SET_CLR_KEY _IOW('F', 0x22, struct mxcfb_color_key)
+#define MXCFB_SET_LOC_ALPHA _IOWR('F', 0x26, struct mxcfb_loc_alpha)
+#define MXCFB_SET_OVERLAY_POS _IOWR('F', 0x24, struct mxcfb_pos)
+
+struct mxcfb_gbl_alpha {
+ int enable;
+ uint32_t alpha;
+};
+
+struct mxcfb_color_key {
+ int enable;
+ uint32_t color_key;
+};
+
+struct mxcfb_loc_alpha {
+ int enable;
+ int alpha_in_pixel;
+ unsigned long alpha_phy_addr0;
+ unsigned long alpha_phy_addr1;
+};
+
+struct mxcfb_pos {
+ uint16_t x;
+ uint16_t y;
+};
+
+static void usage(FILE * fp, int argc, char **argv)
+{
+ fprintf(fp,
+ "Usage: %s [options]\n\n"
+ "Options:\n"
+ " -a | --alpha value Set value as alpha channel (when global alpha)\n"
+ " -d | --device name Framebuffer device name [/dev/fb1]\n"
+ " -g | --global [0|1] (De)Activate global alpha. When set please define alpha and key values\n"
+ " -h | --help Print this message\n"
+ " -k | --key 0xAARRGGBB ARGB value of color key (when global alpha)\n"
+ " -l | --local [0|1] (De)Activate local alpha.\n"
+ " -x | --x_pos X Use X as overlay position\n"
+ " -y | --y_pos Y Use Y as overlay vertical position\n"
+ "", argv[0]);
+}
+
+static const char short_options[] = "a:d:g:hk:l:x:y:";
+
+static const struct option long_options[] = {
+ {"alpha", required_argument, NULL, 'a'},
+ {"device", required_argument, NULL, 'd'},
+ {"global", required_argument, NULL, 'g'},
+ {"help", no_argument, NULL, 'h'},
+ {"key", required_argument, NULL, 'k'},
+ {"local", required_argument, NULL, 'l'},
+ {"x_pos", required_argument, NULL, 'x'},
+ {"y_pos", required_argument, NULL, 'y'},
+ {0, 0, 0, 0}
+};
+
+int main(int argc, char **argv)
+{
+ int fb_fd;
+ struct mxcfb_gbl_alpha gbl_alpha;
+ struct mxcfb_loc_alpha l_alpha;
+ struct mxcfb_color_key key;
+ char *fb_name = "/dev/fb1";
+ char *endptr;
+ struct mxcfb_pos fb_pos = { 100, 100 };
+
+ if (argc < 3) {
+ usage(stdout, argc, argv);
+ return -1;
+ }
+
+ for (;;) {
+ int index;
+ int c;
+
+ c = getopt_long(argc, argv,
+ short_options, long_options, &index);
+
+ if (-1 == c)
+ break;
+
+ switch (c) {
+ case 0: /* getopt_long() flag */
+ break;
+
+ case 'd':
+ fb_name = optarg;
+ break;
+
+ case 'h':
+ usage(stdout, argc, argv);
+ exit(EXIT_SUCCESS);
+
+ case 'x':
+ fb_pos.x = atoi(optarg);
+ break;
+
+ case 'y':
+ fb_pos.y = atoi(optarg);
+ break;
+
+ case 'g':
+ gbl_alpha.enable = atoi(optarg);
+ if (gbl_alpha.enable == 1) {
+ printf("enable global alpha blending\n");
+ key.enable = 1;
+ } else {
+ printf("disable global alpha blending\n");
+ key.enable = 0;
+ }
+ break;
+
+ case 'a':
+ gbl_alpha.alpha = atoi(optarg);
+ break;
+
+ case 'l':
+ l_alpha.alpha_in_pixel = 1;
+ l_alpha.enable = atoi(optarg);
+ if (l_alpha.enable == 1) {
+ printf("enable local alpha blending\n");
+ } else {
+ printf("disable local alpha blending\n");
+ }
+ break;
+
+ case 'k':
+ key.color_key = strtol(optarg, &endptr, 16);
+ printf("key = 0x%x\n", key.color_key);
+ break;
+
+ default:
+ usage(stderr, argc, argv);
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ printf("opening '%s'\n", fb_name);
+
+ fb_fd = open(fb_name, O_RDWR, 0);
+
+ if (fb_fd == -1) {
+ perror("open");
+ exit(1);
+ }
+
+ if (ioctl(fb_fd, MXCFB_SET_OVERLAY_POS, &fb_pos))
+ perror("ioctl");
+
+ if (gbl_alpha.enable == 1) {
+ if (ioctl(fb_fd, MXCFB_SET_GBL_ALPHA, &gbl_alpha))
+ perror("ioctl");
+ if (ioctl(fb_fd, MXCFB_SET_CLR_KEY, &key))
+ perror("ioctl");
+ } else if (l_alpha.alpha_in_pixel == 1) {
+ if (ioctl(fb_fd, MXCFB_SET_LOC_ALPHA, &l_alpha))
+ perror("ioctl");
+ }
+
+ close(fb_fd);
+ return 0;
+}
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