[fbcon] Move margin calculations to fbcon.c

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/interface/pcbios/vesafb.c

 	physaddr_t start;
 	/** Pixel geometry */
 	struct fbcon_geometry pixel;
-	/** Margin */
-	struct fbcon_margin margin;
 	/** Colour mapping */
 	struct fbcon_colour_map map;
 	/** Font definition */
 static int vesafb_init ( struct console_configuration *config ) {
 	uint32_t discard_b;
 	uint16_t *mode_numbers;
-	unsigned int xgap;
-	unsigned int ygap;
-	unsigned int left;
-	unsigned int right;
-	unsigned int top;
-	unsigned int bottom;
 	int mode_number;
 	int rc;
 
 	if ( ( rc = vesafb_set_mode ( mode_number ) ) != 0 )
 		goto err_set_mode;
 
-	/* Calculate margin.  If the actual screen size is larger than
-	 * the requested screen size, then update the margins so that
-	 * the margin remains relative to the requested screen size.
-	 * (As an exception, if a zero margin was specified then treat
-	 * this as meaning "expand to edge of actual screen".)
-	 */
-	xgap = ( vesafb.pixel.width - config->width );
-	ygap = ( vesafb.pixel.height - config->height );
-	left = ( xgap / 2 );
-	right = ( xgap - left );
-	top = ( ygap / 2 );
-	bottom = ( ygap - top );
-	vesafb.margin.left = ( config->left + ( config->left ? left : 0 ) );
-	vesafb.margin.right = ( config->right + ( config->right ? right : 0 ) );
-	vesafb.margin.top = ( config->top + ( config->top ? top : 0 ) );
-	vesafb.margin.bottom =
-		( config->bottom + ( config->bottom ? bottom : 0 ) );
-
 	/* Get font data */
 	vesafb_font();
 
 	/* Initialise frame buffer console */
 	if ( ( rc = fbcon_init ( &vesafb.fbcon, phys_to_user ( vesafb.start ),
-				 &vesafb.pixel, &vesafb.margin, &vesafb.map,
-				 &vesafb.font, config->pixbuf ) ) != 0 )
+				 &vesafb.pixel, &vesafb.map, &vesafb.font,
+				 config ) ) != 0 )
 		goto err_fbcon_init;
 
 	free ( mode_numbers );

src/core/fbcon.c

  * @v fbcon		Frame buffer console
  * @v start		Start address
  * @v pixel		Pixel geometry
- * @v margin		Minimum margin
  * @v map		Colour mapping
  * @v font		Font definition
- * @v pixbuf		Background picture (if any)
+ * @v config		Console configuration
  * @ret rc		Return status code
  */
 int fbcon_init ( struct fbcon *fbcon, userptr_t start,
 		 struct fbcon_geometry *pixel,
-		 struct fbcon_margin *margin,
 		 struct fbcon_colour_map *map,
 		 struct fbcon_font *font,
-		 struct pixel_buffer *pixbuf ) {
+		 struct console_configuration *config ) {
 	int width;
 	int height;
 	unsigned int xgap;
 	unsigned int ygap;
+	unsigned int left;
+	unsigned int right;
+	unsigned int top;
+	unsigned int bottom;
 	int rc;
 
 	/* Initialise data structure */
 	       user_to_phys ( fbcon->start, 0 ),
 	       user_to_phys ( fbcon->start, fbcon->len ) );
 
+	/* Calculate margin.  If the actual screen size is larger than
+	 * the requested screen size, then update the margins so that
+	 * the margin remains relative to the requested screen size.
+	 * (As an exception, if a zero margin was specified then treat
+	 * this as meaning "expand to edge of actual screen".)
+	 */
+	xgap = ( pixel->width - config->width );
+	ygap = ( pixel->height - config->height );
+	left = ( xgap / 2 );
+	right = ( xgap - left );
+	top = ( ygap / 2 );
+	bottom = ( ygap - top );
+	fbcon->margin.left = ( config->left + ( config->left ? left : 0 ) );
+	fbcon->margin.right = ( config->right + ( config->right ? right : 0 ) );
+	fbcon->margin.top = ( config->top + ( config->top ? top : 0 ) );
+	fbcon->margin.bottom =
+		( config->bottom + ( config->bottom ? bottom : 0 ) );
+
 	/* Expand margin to accommodate whole characters */
-	width = ( pixel->width - margin->left - margin->right );
-	height = ( pixel->height - margin->top - margin->bottom );
+	width = ( pixel->width - fbcon->margin.left - fbcon->margin.right );
+	height = ( pixel->height - fbcon->margin.top - fbcon->margin.bottom );
 	if ( ( width < FBCON_CHAR_WIDTH ) ||
 	     ( height < ( ( int ) font->height ) ) ) {
 		DBGC ( fbcon, "FBCON %p has unusable character area "
-		       "[%d-%d),[%d-%d)\n", fbcon,
-		       margin->left, ( pixel->width - margin->right ),
-		       margin->top, ( pixel->height - margin->bottom ) );
+		       "[%d-%d),[%d-%d)\n", fbcon, fbcon->margin.left,
+		       ( pixel->width - fbcon->margin.right ),
+		       fbcon->margin.top,
+		       ( pixel->height - fbcon->margin.bottom ) );
 		rc = -EINVAL;
 		goto err_margin;
 	}
 	xgap = ( width % FBCON_CHAR_WIDTH );
 	ygap = ( height % font->height );
-	fbcon->margin.left = ( margin->left + ( xgap / 2 ) );
-	fbcon->margin.top = ( margin->top + ( ygap / 2 ) );
-	fbcon->margin.right = ( margin->right + ( xgap - ( xgap / 2 ) ) );
-	fbcon->margin.bottom = ( margin->bottom + ( ygap - ( ygap / 2 ) ) );
+	fbcon->margin.left += ( xgap / 2 );
+	fbcon->margin.top += ( ygap / 2 );
+	fbcon->margin.right += ( xgap - ( xgap / 2 ) );
+	fbcon->margin.bottom += ( ygap - ( ygap / 2 ) );
 	fbcon->indent = ( ( fbcon->margin.top * pixel->stride ) +
 			  ( fbcon->margin.left * pixel->len ) );
 
 	memset_user ( fbcon->start, 0, 0, fbcon->len );
 
 	/* Generate pixel buffer from background image, if applicable */
-	if ( pixbuf && ( ( rc = fbcon_picture_init ( fbcon, pixbuf ) ) != 0 ) )
+	if ( config->pixbuf &&
+	     ( ( rc = fbcon_picture_init ( fbcon, config->pixbuf ) ) != 0 ) )
 		goto err_picture;
 
 	/* Draw background picture (including margins), if applicable */

src/include/ipxe/fbcon.h

 #include <stdint.h>
 #include <ipxe/ansiesc.h>
 #include <ipxe/uaccess.h>
-
-struct pixel_buffer;
+#include <ipxe/console.h>
 
 /** Character width, in pixels */
 #define FBCON_CHAR_WIDTH 9
 
 extern int fbcon_init ( struct fbcon *fbcon, userptr_t start,
 			struct fbcon_geometry *pixel,
-			struct fbcon_margin *margin,
 			struct fbcon_colour_map *map,
 			struct fbcon_font *font,
-			struct pixel_buffer *pixbuf );
+			struct console_configuration *config );
 extern void fbcon_fini ( struct fbcon *fbcon );
 extern void fbcon_putchar ( struct fbcon *fbcon, int character );