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CairoContext.c
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CairoContext.c
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#include <stdio.h> /* fprintf */
#include <stdlib.h> /* calloc */
#include <string.h> /* memcpy */
#include <time.h> /* localtime */
#include <math.h> /* M_2_PI */
#include "CTI.h"
#include "CairoContext.h"
#include "Images.h"
#include "Array.h"
#include "File.h"
#include "localptr.h"
#include "cairo.h"
static void Config_handler(Instance *pi, void *msg);
static void Command_handler(Instance *pi, void *msg);
static void rgb3_handler(Instance *pi, void *msg);
static void y422p_handler(Instance *pi, void *msg);
enum { INPUT_CONFIG, INPUT_COMMAND, INPUT_RGB3, INPUT_YUV422P };
static Input CairoContext_inputs[] = {
[ INPUT_CONFIG ] = { .type_label = "Config_msg", .handler = Config_handler },
[ INPUT_COMMAND ] = { .type_label = "CairoCommand", .handler = Command_handler },
[ INPUT_RGB3 ] = { .type_label = "RGB3_buffer", .handler = rgb3_handler },
[ INPUT_YUV422P ] = { .type_label = "YUV422P_buffer", .handler = y422p_handler },
};
enum { OUTPUT_RGB3, OUTPUT_YUV422P, OUTPUT_YUV420P };
static Output CairoContext_outputs[] = {
[ OUTPUT_RGB3 ] = { .type_label = "RGB3_buffer", .destination = 0L },
[ OUTPUT_YUV422P ] = { .type_label = "YUV422P_buffer", .destination = 0L },
[ OUTPUT_YUV420P ] = { .type_label = "YUV420P_buffer", .destination = 0L },
};
/* Map text strings to commands. */
static struct {
const char *label;
int command;
int num_double_args;
} CairoCommandMap [] = {
{ .label = "set_source_rgb", .command = CC_COMMAND_SET_SOURCE_RGB, .num_double_args = 3 },
{ .label = "set_source_rgba", .command = CC_COMMAND_SET_SOURCE_RGB, .num_double_args = 4 },
{ .label = "set_line_width", .command = CC_COMMAND_SET_LINE_WIDTH, .num_double_args = 1 },
{ .label = "move_to", .command = CC_COMMAND_MOVE_TO, .num_double_args = 2 },
{ .label = "line_to", .command = CC_COMMAND_LINE_TO, .num_double_args = 2 },
{ .label = "rel_move_to", .command = CC_COMMAND_REL_MOVE_TO, .num_double_args = 2 },
{ .label = "rel_line_to", .command = CC_COMMAND_REL_LINE_TO, .num_double_args = 2 },
{ .label = "close_path", .command = CC_COMMAND_CLOSE_PATH, .num_double_args = 0 },
{ .label = "translate", .command = CC_COMMAND_TRANSLATE, .num_double_args = 2 },
{ .label = "scale", .command = CC_COMMAND_SCALE, .num_double_args = 2 },
{ .label = "rotate", .command = CC_COMMAND_ROTATE, .num_double_args = 1 },
{ .label = "fill", .command = CC_COMMAND_FILL, .num_double_args = 0 },
{ .label = "stroke", .command = CC_COMMAND_STROKE, .num_double_args = 0 },
{ .label = "push_group", .command = CC_COMMAND_PUSH_GROUP, .num_double_args = 0 },
{ .label = "pop_group", .command = CC_COMMAND_POP_GROUP, .num_double_args = 0 },
{ .label = "identity_matrix", .command = CC_COMMAND_IDENTITY_MATRIX, .num_double_args = 0 },
{ .label = "set_font_size", .command = CC_COMMAND_SET_FONT_SIZE, .num_double_args = 1 },
{ .label = "show_text", .command = CC_COMMAND_SHOW_TEXT, .num_double_args = 0 },
{ .label = "rotate_subseconds", .command = CC_COMMAND_ROTATE_SUBSECONDS, .num_double_args = 0 },
{ .label = "rotate_seconds", .command = CC_COMMAND_ROTATE_SECONDS, .num_double_args = 0 },
{ .label = "rotate_minutes", .command = CC_COMMAND_ROTATE_MINUTES, .num_double_args = 0 },
{ .label = "rotate_hours", .command = CC_COMMAND_ROTATE_HOURS, .num_double_args = 0 },
};
typedef struct {
Instance i;
cairo_surface_t *surface;
cairo_t *context;
/* FIXME: Enable left, top */
//int left;
//int top;
int width;
int height;
Array(CairoCommand) commands;
String * text;
long timeout;
long timeout_timestamp;
String * hostname;
String * label;
} CairoContext_private;
static int set_show_text(Instance *pi, const char *value)
{
CairoContext_private *priv = (CairoContext_private *)pi;
if (!String_is_none(priv->text)) {
String_clear(&priv->text);
}
//priv->text = String_new(value);
priv->text = String_unescape(SC(value));
if (priv->timeout) {
struct timeval tv;
gettimeofday(&tv, NULL);
priv->timeout_timestamp = tv.tv_sec;
}
return 0;
}
static int set_label(Instance *pi, const char *value)
{
CairoContext_private *priv = (CairoContext_private *)pi;
if (priv->label) {
String_free(&priv->label);
}
priv->label = String_new(value);
return 0;
}
static void do_system_text(CairoContext_private * priv, String * key)
{
dpf("%s: key=%s\n", __func__, s(key));
localptr(String, value) = String_value_none();
if (streq(s(key), "hostname")) {
value = String_dup(priv->hostname);
String_trim_right(value);
}
else if (streq(s(key), "datetime")) {
char datetime[128];
time_t t = time(NULL);
struct tm *lt = localtime(&t);
if (lt) {
strftime(datetime, sizeof(datetime), "%Y-%m-%d %H:%M:%S %Z", lt);
value = String_new(datetime);
}
}
else if (streq(s(key), "wifistatus")) {
//value = String_new("WiFi ...");
//system("iwconfig wlan0 | grep Signal | sed -e 's/.*Signal.level=//g' -e 's/[ ].*$//g' > /dev/shm/wifi.txt");
//localptr(String, wifitmp) = File_load_text(S("/dev/shm/wifi.txt"));
//String_cat1(value, s(wifitmp));
//String_trim_right(value);
}
else if (streq(s(key), "memstatus")) {
//system("grep -E 'MemFree' /proc/meminfo | sed -e 's/.kB$//g' -e 's/.* //g' > /dev/shm/memstatus.txt");
//value = File_load_text(S("/dev/shm/memstatus.txt"));
//String_trim_right(value);
//String_cat1(value, "kB free");
}
if (!String_is_none(value)) {
cairo_show_text(priv->context, value->bytes);
}
}
static int add_command(Instance *pi, const char *value)
{
CairoContext_private *priv = (CairoContext_private *)pi;
CairoCommand cmd = {};
char label[256] = {};
int i;
int j;
int n;
int found = 0;
n = sscanf(value, "%255s %lf %lf %lf %lf %lf %lf",
label,
&cmd.args[0],
&cmd.args[1],
&cmd.args[2],
&cmd.args[3],
&cmd.args[4],
&cmd.args[5]);
fprintf(stderr, "add_command label=%s\n", label[0] ? label : "" );
fprintf(stderr, "%d %d\n", streq(value, "system_text") , value[strlen(value)] != 0);
if (streq(label, "set_text") && value[strlen(label)] != 0) {
cmd.command = CC_COMMAND_SET_TEXT;
cmd.text = String_new(value + strlen(label) + 1);
Array_append(priv->commands, cmd);
found = 1;
goto out;
}
else if (streq(label, "system_text") && value[strlen(label)] != 0) {
cmd.command = CC_COMMAND_SYSTEM_TEXT;
cmd.text = String_new(value + strlen(label) + 1);
Array_append(priv->commands, cmd);
found = 1;
goto out;
}
for (i=0; i < table_size(CairoCommandMap); i++) {
if (streq(label, CairoCommandMap[i].label)
&& (n-1) == CairoCommandMap[i].num_double_args) {
cmd.command = CairoCommandMap[i].command;
printf("cairo_%s", label);
for (j=0; j < CairoCommandMap[i].num_double_args; j++) {
printf(" %lf", cmd.args[j]);
}
printf("\n");
Array_append(priv->commands, cmd);
found = 1;
goto out;
}
}
if (!found) {
n = sscanf(value, "%255s",
label);
if (streq(label, "reset")) {
Array_free(priv->commands, CairoCommand, NULL);
}
}
out:
return 0;
}
static void apply_commands(CairoContext_private *priv, RGB3_buffer * rgb3)
{
int i;
time_t t;
struct tm lt;
double rval = 0.0;
priv->surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, priv->width, priv->height);
priv->context = cairo_create(priv->surface);
for (i=0; i < Array_count(priv->commands); i++) {
CairoCommand cmd = Array_get(priv->commands, i);
switch (cmd.command) {
case CC_COMMAND_SET_SOURCE_RGB:
cairo_set_source_rgb(priv->context, cmd.args[0], cmd.args[1], cmd.args[2]);
break;
case CC_COMMAND_SET_SOURCE_RGBA:
cairo_set_source_rgba(priv->context, cmd.args[0], cmd.args[1], cmd.args[2], cmd.args[3]);
break;
case CC_COMMAND_SET_LINE_WIDTH:
cairo_set_line_width(priv->context, cmd.args[0]);
break;
case CC_COMMAND_MOVE_TO:
cairo_move_to(priv->context, cmd.args[0], cmd.args[1]);
break;
case CC_COMMAND_LINE_TO:
cairo_line_to(priv->context, cmd.args[0], cmd.args[1]);
break;
case CC_COMMAND_REL_MOVE_TO:
cairo_rel_move_to(priv->context, cmd.args[0], cmd.args[1]);
break;
case CC_COMMAND_REL_LINE_TO:
cairo_rel_line_to(priv->context, cmd.args[0], cmd.args[1]);
break;
case CC_COMMAND_CLOSE_PATH:
cairo_close_path(priv->context);
break;
case CC_COMMAND_TRANSLATE:
cairo_translate(priv->context, cmd.args[0], cmd.args[1]);
break;
case CC_COMMAND_SCALE:
cairo_scale(priv->context, cmd.args[0], cmd.args[1]);
break;
case CC_COMMAND_ROTATE:
cairo_rotate(priv->context, cmd.args[0]);
break;
case CC_COMMAND_FILL:
cairo_fill(priv->context);
break;
case CC_COMMAND_STROKE:
cairo_stroke(priv->context);
break;
case CC_COMMAND_PUSH_GROUP:
cairo_push_group(priv->context);
break;
case CC_COMMAND_POP_GROUP:
cairo_pop_group(priv->context);
break;
case CC_COMMAND_IDENTITY_MATRIX:
cairo_identity_matrix(priv->context);
break;
case CC_COMMAND_SET_FONT_SIZE:
cairo_set_font_size(priv->context, cmd.args[0]);
break;
case CC_COMMAND_SHOW_TEXT:
if (s(priv->text)) {
cairo_show_text(priv->context, s(priv->text));
}
break;
case CC_COMMAND_SET_TEXT:
if (cmd.text) {
cairo_show_text(priv->context, cmd.text->bytes);
}
break;
case CC_COMMAND_SYSTEM_TEXT:
if (cmd.text) {
do_system_text(priv, cmd.text);
}
break;
case CC_COMMAND_ROTATE_SUBSECONDS:
rval = (2*M_PI) * fmod(rgb3->c.timestamp , 1.0);
cairo_rotate(priv->context, rval);
break;
case CC_COMMAND_ROTATE_SECONDS:
t = (time_t)rgb3->c.timestamp;
localtime_r(&t, <);
// printf("t=%ld lt.tm_sec=%d lt.tm_min=%d lt.tm_hour=%d\n", t, lt.tm_sec, lt.tm_min, lt.tm_hour);
rval = (2*M_PI / 60) * (lt.tm_sec /* + (rgb3->c.tv.tv_usec/1000000.0) */);
cairo_rotate(priv->context, rval);
break;
case CC_COMMAND_ROTATE_MINUTES:
t = (time_t)rgb3->c.timestamp;
localtime_r(&t, <);
rval = (2*M_PI / 60) * (lt.tm_min + (lt.tm_sec/60.0));
cairo_rotate(priv->context, rval);
break;
case CC_COMMAND_ROTATE_HOURS:
t = (time_t)rgb3->c.timestamp;
localtime_r(&t, <);
rval = (2*M_PI / 12) * (lt.tm_hour + (lt.tm_min/60.0) + (lt.tm_sec/3600.0));
cairo_rotate(priv->context, rval);
break;
default:
break;
}
}
dpf("%d cairo operations done, status=%d\n", i, cairo_status(priv->context));
/* Now merge into RGB buffer. */
RGB_buffer_merge_rgba(rgb3,
cairo_image_surface_get_data(priv->surface),
cairo_image_surface_get_width(priv->surface),
cairo_image_surface_get_height(priv->surface),
cairo_image_surface_get_stride(priv->surface));
if (!String_is_none(priv->label) && !rgb3->c.label) {
rgb3->c.label = String_dup(priv->label);
}
cairo_surface_destroy(priv->surface);
cairo_destroy(priv->context);
}
static void rgb3_handler(Instance *pi, void *msg)
{
CairoContext_private *priv = (CairoContext_private *)pi;
RGB3_buffer * rgb3 = msg;
int do_apply = 1;
if (priv->timeout) {
struct timeval tv;
gettimeofday(&tv, NULL);
if (priv->timeout_timestamp + priv->timeout < tv.tv_sec) {
do_apply = 0;
}
}
if (do_apply) {
apply_commands(priv, rgb3);
}
if (pi->outputs[OUTPUT_YUV420P].destination) {
YUV420P_buffer * yuv = RGB3_to_YUV420P(rgb3);
PostData(yuv, pi->outputs[OUTPUT_YUV420P].destination);
}
if (pi->outputs[OUTPUT_RGB3].destination) {
PostData(rgb3, pi->outputs[OUTPUT_RGB3].destination);
}
else {
RGB3_buffer_release(rgb3);
}
}
static void y422p_handler(Instance *pi, void *msg)
{
CairoContext_private *priv = (CairoContext_private *)pi;
YUV422P_buffer * y422p = msg;
int do_apply = 1;
if (priv->timeout) {
struct timeval tv;
gettimeofday(&tv, NULL);
if (priv->timeout_timestamp + priv->timeout < tv.tv_sec) {
do_apply = 0;
}
}
if (do_apply) {
YUV422P_buffer * temp;
RGB3_buffer * rgb3;
/* I could avoid some of the "temp" buffers here by setting up
in-place structures, if strides are used correctly in the image
code. */
temp = YUV422P_copy(y422p, 0, 0, priv->width, priv->height);
rgb3 = YUV422P_to_RGB3(temp);
rgb3->c.timestamp = y422p->c.timestamp; /* Preserve timestamp! */
YUV422P_buffer_release(temp);
apply_commands(priv, rgb3);
temp = RGB3_to_YUV422P(rgb3);
RGB3_buffer_release(rgb3);
YUV422P_paste(y422p, temp, 0, 0, priv->width, priv->height);
YUV422P_buffer_release(temp);
}
if (pi->outputs[OUTPUT_YUV422P].destination) {
PostData(y422p, pi->outputs[OUTPUT_YUV422P].destination);
}
else {
YUV422P_buffer_release(y422p);
}
}
static Config config_table[] = {
{ "width", 0L, 0L, 0L, cti_set_int, offsetof(CairoContext_private, width) },
{ "height", 0L, 0L, 0L, cti_set_int, offsetof(CairoContext_private, height) },
{ "timeout", 0L, 0L, 0L, cti_set_int, offsetof(CairoContext_private, timeout) },
{ "command", add_command, 0L, 0L },
{ "text", set_show_text, 0L, 0L },
{ "label", set_label, 0L, 0L },
};
static void Config_handler(Instance *pi, void *data)
{
Generic_config_handler(pi, data, config_table, table_size(config_table));
}
static void Command_handler(Instance *pi, void *data)
{
/* Binary command interface, avoids generating and parsing commands. */
}
static void CairoContext_tick(Instance *pi)
{
Handler_message *hm;
hm = GetData(pi, 1);
if (hm) {
hm->handler(pi, hm->data);
ReleaseMessage(&hm,pi);
}
pi->counter++;
}
static void CairoContext_instance_init(Instance *pi)
{
CairoContext_private *priv = (CairoContext_private *)pi;
priv->text = String_value_none();
priv->label = String_value_none();
priv->hostname = File_load_text(S("/etc/hostname"));
String_trim_right(priv->hostname);
}
static Template CairoContext_template = {
.label = "CairoContext",
.priv_size = sizeof(CairoContext_private),
.inputs = CairoContext_inputs,
.num_inputs = table_size(CairoContext_inputs),
.outputs = CairoContext_outputs,
.num_outputs = table_size(CairoContext_outputs),
.tick = CairoContext_tick,
.instance_init = CairoContext_instance_init,
};
void CairoContext_init(void)
{
Template_register(&CairoContext_template);
}