* Allow to create the initial canvas with a zero size. Either the application

resizes it later, or the driver changes it to fit the display.

caca/driver_gl.c

@@ -86,7 +86,7 @@ static int gl_init_graphics(caca_display_t *dp)
     char const *geometry;
     char *argv[2] = { "", NULL };
     char const * const * fonts;
-    unsigned int width = 0, height = 0;
+    unsigned int width = dp->cv->width, height = dp->cv->height;
     int argc = 1;
 
     dp->drv.p = malloc(sizeof(struct driver_private));
@@ -99,9 +99,7 @@ static int gl_init_graphics(caca_display_t *dp)
         sscanf(geometry, "%ux%u", &width, &height);
 #endif
 
-    if(width && height)
-        _cucul_set_canvas_size(dp->cv, width, height);
-
+    _cucul_set_canvas_size(dp->cv, width ? width : 80, height ? height : 32);
 
     /* Load a libcucul internal font */
     fonts = cucul_get_font_list();

caca/driver_raw.c

@@ -21,6 +21,7 @@
 #if !defined(__KERNEL__)
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "caca.h"
 #include "caca_internals.h"
@@ -29,6 +30,17 @@
 
 static int raw_init_graphics(caca_display_t *dp)
 {
+    unsigned int width = dp->cv->width, height = dp->cv->height;
+    char const *geometry;
+
+#if defined(HAVE_GETENV)
+    geometry = getenv("CACA_GEOMETRY");
+    if(geometry && *geometry)
+        sscanf(geometry, "%ux%u", &width, &height);
+#endif
+
+    _cucul_set_canvas_size(dp->cv, width ? width : 80, height ? height : 24);
+
     return 0;
 }
 

caca/driver_win32.c

@@ -112,8 +112,8 @@ static int win32_init_graphics(caca_display_t *dp)
         return -1;
 
     /* Set the new console size */
-    size.X = dp->cv->width;
-    size.Y = dp->cv->height;
+    size.X = dp->cv->width ? dp->cv->width : 80;
+    size.Y = dp->cv->height ? dp->cv->height : 25;
     SetConsoleScreenBufferSize(dp->drv.p->screen, size);
 
     rect.Left = rect.Top = 0;

caca/driver_x11.c

@@ -67,7 +67,7 @@ static int x11_init_graphics(caca_display_t *dp)
     int (*old_error_handler)(Display *, XErrorEvent *);
     char const *fonts[] = { NULL, "8x13bold", "fixed" }, **parser;
     char const *geometry;
-    unsigned int width = 0, height = 0;
+    unsigned int width = dp->cv->width, height = dp->cv->height;
     int i;
 
     dp->drv.p = malloc(sizeof(struct driver_private));
@@ -78,8 +78,7 @@ static int x11_init_graphics(caca_display_t *dp)
         sscanf(geometry, "%ux%u", &width, &height);
 #endif
 
-    if(width && height)
-        _cucul_set_canvas_size(dp->cv, width, height);
+    _cucul_set_canvas_size(dp->cv, width ? width : 80, height ? height : 32);
 
     dp->drv.p->dpy = XOpenDisplay(NULL);
     if(dp->drv.p->dpy == NULL)

cucul/cucul.c

@@ -43,9 +43,6 @@
  *  \e libcucul function to be called in a function. cucul_free_canvas()
  *  should be called at the end of the program to free all allocated resources.
  *
- *  If one of the desired canvas coordinates is zero, a default canvas size
- *  of 80x32 is used instead.
- *
  *  If an error occurs, NULL is returned and \b errno is set accordingly:
  *  - \c ENOMEM Not enough memory for the requested canvas size.
  *
@@ -56,7 +53,6 @@
 cucul_canvas_t * cucul_create_canvas(unsigned int width, unsigned int height)
 {
     cucul_canvas_t *cv = malloc(sizeof(cucul_canvas_t));
-    int ret;
 
     if(!cv)
         goto nomem;
@@ -88,15 +84,7 @@ cucul_canvas_t * cucul_create_canvas(unsigned int width, unsigned int height)
     cv->allchars[0] = NULL;
     cv->allattr[0] = NULL;
 
-    /* Initialise to a default size. 80x32 is arbitrary but matches AAlib's
-     * default X11 window. When a graphic driver attaches to us, it can set
-     * a different size. */
-    if(width && height)
-        ret = _cucul_set_canvas_size(cv, width, height);
-    else
-        ret = _cucul_set_canvas_size(cv, 80, 32);
-
-    if(ret < 0)
+    if(_cucul_set_canvas_size(cv, width, height) < 0)
     {
 #if defined(HAVE_ERRNO_H)
         int saved_errno = errno;