Working on charts

(now it can generate empty transparent images)

git-svn-id: file:///home/jan/tmp/wetterstation/trunk@86 dd492736-c11a-0410-ad51-8c26713eaf7f

cronjob/chart/Makefile

@@ -3,6 +3,7 @@ LD      = gcc
 RM	= rm
 CFLAGS  = -c
 LDFLAS  = -o
+LD_LIBS = -lefence -lm -lpq -lgd -lpng -lz -lfreetype
 #INCL	= -I$$(pg_config --includedir)
 
 BIN_NAME = chart
@@ -24,8 +25,8 @@ all: $(BIN_NAME)
 
 # Binary Linken
 $(BIN_NAME): $(OBJS)
-	@ echo Linke: $(LD) $(DEBUG) $(NOLOG) -L$$(pg_config --libdir)/pgsql -lm -lpq $(LDFLAS) $(BIN_NAME) $(OBJS)
-	@ $(LD) $(DEBUG) $(NOLOG) -L$$(pg_config --libdir)/pgsql -lefence -lm -lpq $(LDFLAS) $(BIN_NAME) $(OBJS)
+	@ echo Linke: $(LD) $(DEBUG) $(NOLOG) -L$$(pg_config --libdir)/pgsql $(LD_LIBS) $(LDFLAS) $(BIN_NAME) $(OBJS)
+	@ $(LD) $(DEBUG) $(NOLOG) -L$$(pg_config --libdir)/pgsql $(LD_LIBS) $(LDFLAS) $(BIN_NAME) $(OBJS)
 	@ echo Binary $(BIN_NAME) ist fertig!
 
 # Abhängigkeiten

cronjob/chart/chart.c

@@ -107,6 +107,8 @@ int main(int argc, char *argv[]){
   if(walk_image_cfg_list())
     wait_for_childs(NULL);
 
+  DEBUGOUT1("\n-------------------------------------------------------------------\nEnde\n");
+
   return EXIT_SUCCESS;
 }
 

cronjob/chart/image_file/image_config.c

@@ -76,6 +76,9 @@ static int read_color(const char *line, void *arg){
 
   *col = tmp;
 
+  free(buff);
+
+  return 1; 
 }
 
 /* Ein Interval einlesen.

cronjob/chart/image_file/image_draw.c

@@ -1,19 +1,36 @@
 #include <stdio.h>
+#include <gd.h>
 #include "image_draw.h"
 #include "image_data.h"
+#include "image_common.h"
 
 
-static void create_image();
+typedef int color;
+
+
+static gdImagePtr create_image();
 static void draw_image();
-static void write_image();
+static void write_image_png(gdImagePtr, FILE *);
 
 
 int draw_to_file(FILE *fd){
+  gdImagePtr img = create_image();
   draw_image();
+  write_image_png(img, fd);
 }
 
-static void create_image(){
+static gdImagePtr create_image(){
+  gdImagePtr new_img   = NULL;
+  color back;
+  img_color_ptr back_p = img_cfg.bg_color;
 
+  new_img = gdImageCreateTrueColor(img_cfg.width, img_cfg.height);
+  gdImageAlphaBlending(new_img, 0);
+  back = gdImageColorAllocateAlpha( new_img, back_p->r, back_p->g, back_p->b, back_p->alpha );
+  gdImageFilledRectangle(new_img, 0,0,img_cfg.width, img_cfg.height, back);
+  gdImageAlphaBlending(new_img, 1);
+  
+  return new_img;
 }
 
 static void draw_image(){
@@ -21,6 +38,8 @@ static void draw_image(){
 
 }
 
-static void write_image(){
-
+static void write_image_png(gdImagePtr img, FILE *fd){
+  gdImageAlphaBlending(img, 0);
+  gdImageSaveAlpha(img, 1);
+  gdImagePng(img, fd);
 }

cronjob/chart/image_file/image_file.c

@@ -92,9 +92,10 @@ static int check_file_interval(){
     DEBUGOUT3("Datei '%s' ist %d Sek. alt \n", img_cfg.file_name, diff_sek);
     DEBUGOUT2("Sie soll aller %d Sek. neu generiert werden \n", img_cfg.gen_interval);
 
-    if(diff_sek > img_cfg.gen_interval)
-    DEBUGOUT1("Sie muss neu generiert werden!\n");
+    if(diff_sek > img_cfg.gen_interval){
+      DEBUGOUT1("Sie muss neu generiert werden!\n");
       return 1;
+    }
 
   } else {
     exit_error(ERROR_STAT);
@@ -104,5 +105,6 @@ static int check_file_interval(){
 }
 
 static void regenerate_image(){
-  draw_to_file(NULL);
+  FILE *fd = fopen(img_cfg.file_name, "wb");
+  draw_to_file(fd);
 }

cronjob/chart/image_file/testimage.conf

@@ -3,7 +3,7 @@ headline		Testbild
 manual_table		no
 manual_table_name	auss2_data
 table_field		temp
-gen_interval		15m
+gen_interval		15
 show_interval		1h	
 label_interval		10m
 label_sum   		no
@@ -11,4 +11,4 @@ width			400
 height			250
 sensor_id		1
 
-bg_color		10:2c:30:00  #test
+bg_color		60:30:50:af  #test