partial display improvements, to be continued (wont compile)

[my-code/ivac.git] / src / display.c

diff --git a/src/display.c b/src/display.c
index 89c6472..afb2a57 100644 (file)
--- a/src/display.c
+++ b/src/display.c
@@ -10,42 +10,92 @@ int display_init(t_display *display) {
 
   puts("[display] initializing display ...");
 
-  /* init stuff next .. */
+  /* dimensions */
   display->max_x=atoi(getenv("COLUMNS"));
   display->max_y=atoi(getenv("LINES"));
 
+  /* allocating 'screen' buffer */
+  if((display->screen=(unsigned char *)malloc(display->max_x*display->max_y))
+     ==NULL) {
+    perror("[display] malloc call");
+    return D_ERROR;
+  }
+  /* space as display pixel default */
+  memset(display->screen,0x20,display->max_x*display->max_y);
+
   return D_SUCCESS;
 }
 
-int display_refresh(t_display *display) {
+int display_draw(t_display *display) {
 
-  display->max_x=atoi(getenv("COLUMNS"));
-  display->max_y=atoi(getenv("LINES"));
+  int x,y;
+
+  for(y=0;y<display->max_y;y++) {
+    for(x=0;x<display->max_x;x++)
+      printf("%c",display->screen+y*display->max_x+x);
+    printf("\n");
+  }
+
+  return D_SUCCESS;
+}
+
+int display_draw_until_line(t_display *display,int line) {
+  
+  int x,y;
+
+  for(x=0;x<display->max_x;x++) {
+    for(y=0;y<line;y++) printf("%c",display->screen+y*display->max_x+x);
+  printf("\n");
+  }
+
+  return D_SUCCESS;
+}
+
+int display_clear_screen(t_display *display) {
+ 
+  memcpy(display->screen,0x20,display->max_x*display->max_y);
 
   return D_SUCCESS;
 }
 
 int display_shutdown(t_display *display) {
 
+  free(display->screen);
+
   puts("[display] shutdown");
 
   return D_SUCCESS;
 }
 
-int display_term_line(t_display *display,char sym) {
+int display_line(t_display *display,int X,int Y,int X_,int Y_,char sym) {
 
-  int i;
+  double m;
+  int x,y;
 
-  for(i=0;i<display->max_x;i++) printf("%c",sym);
-  printf("\n");
+  m=(Y_-Y)/(X_-X);
+
+  for(y=0;y<display->max_y;y++)
+    for(x=0;x<display->max_x;x++)
+      if((int)((x-X)*m+Y)==y) display->screen+y*display->max_x+x=sym;
 
   return D_SUCCESS;
 }
 
-int display_term_string(t_display *display,char *string) {
+int display_string(t_display *display,int x,int y,char *string,int len) {
+
+  if(len>display->max_x-x) return D_INV_STRING_LEN;
 
-  /* to be continued ... */
+  memcpy(display->screen+y*display->max_x+x,string,len);
 
   return D_SUCCESS;
 }
 
+int display_string_vert(t_display *display,int x,int y,char *string,int len) {
+
+  if(len>display->max_y-y) return D_INV_STRING_LEN;
+
+  for(i=y*display->max_x+x;i<(y+len)*display->max_x+x;i+=display->max_x)
+    *(display->screen+i)=*(string++);
+
+  return D_SUCCESS;
+}