[fbcon] Allow for an arbitrary margin around the text area
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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7fc380e950
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608d6cac9e
@ -76,6 +76,8 @@ struct vesafb {
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physaddr_t start;
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/** Pixel geometry */
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struct fbcon_geometry pixel;
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/** Margin */
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struct fbcon_margin margin;
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/** Colour mapping */
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struct fbcon_colour_map map;
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/** Font definition */
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@ -428,8 +430,8 @@ static int vesafb_init ( unsigned int min_width, unsigned int min_height,
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/* Initialise frame buffer console */
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if ( ( rc = fbcon_init ( &vesafb.fbcon, phys_to_user ( vesafb.start ),
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&vesafb.pixel, &vesafb.map, &vesafb.font,
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pixbuf ) ) != 0 )
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&vesafb.pixel, &vesafb.margin, &vesafb.map,
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&vesafb.font, pixbuf ) ) != 0 )
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goto err_fbcon_init;
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free ( mode_numbers );
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@ -573,6 +573,7 @@ static int fbcon_picture_init ( struct fbcon *fbcon,
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* @v fbcon Frame buffer console
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* @v start Start address
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* @v pixel Pixel geometry
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* @v margin Minimum margin
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* @v map Colour mapping
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* @v font Font definition
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* @v pixbuf Background picture (if any)
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@ -580,9 +581,12 @@ static int fbcon_picture_init ( struct fbcon *fbcon,
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*/
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int fbcon_init ( struct fbcon *fbcon, userptr_t start,
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struct fbcon_geometry *pixel,
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struct fbcon_margin *margin,
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struct fbcon_colour_map *map,
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struct fbcon_font *font,
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struct pixel_buffer *pixbuf ) {
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int width;
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int height;
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unsigned int xgap;
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unsigned int ygap;
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int rc;
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@ -603,21 +607,31 @@ int fbcon_init ( struct fbcon *fbcon, userptr_t start,
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user_to_phys ( fbcon->start, 0 ),
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user_to_phys ( fbcon->start, fbcon->len ) );
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/* Derive character geometry from pixel geometry */
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fbcon->character.width = ( pixel->width / FBCON_CHAR_WIDTH );
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fbcon->character.height = ( pixel->height / FBCON_CHAR_HEIGHT );
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fbcon->character.len = ( pixel->len * FBCON_CHAR_WIDTH );
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fbcon->character.stride = ( pixel->stride * FBCON_CHAR_HEIGHT );
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/* Calculate margin */
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xgap = ( pixel->width % FBCON_CHAR_WIDTH );
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ygap = ( pixel->height % FBCON_CHAR_HEIGHT );
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fbcon->margin.left = ( xgap / 2 );
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fbcon->margin.top = ( ygap / 2 );
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fbcon->margin.right = ( xgap - fbcon->margin.left );
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fbcon->margin.bottom = ( ygap - fbcon->margin.top );
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/* Expand margin to accommodate whole characters */
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width = ( pixel->width - margin->left - margin->right );
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height = ( pixel->height - margin->top - margin->bottom );
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if ( ( width < FBCON_CHAR_WIDTH ) || ( height < FBCON_CHAR_HEIGHT ) ) {
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DBGC ( fbcon, "FBCON %p has unusable character area "
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"[%d-%d),[%d-%d)\n", fbcon,
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margin->left, ( pixel->width - margin->right ),
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margin->top, ( pixel->height - margin->bottom ) );
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rc = -EINVAL;
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goto err_margin;
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}
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xgap = ( width % FBCON_CHAR_WIDTH );
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ygap = ( height % FBCON_CHAR_HEIGHT );
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fbcon->margin.left = ( margin->left + ( xgap / 2 ) );
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fbcon->margin.top = ( margin->top + ( ygap / 2 ) );
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fbcon->margin.right = ( margin->right + ( xgap - ( xgap / 2 ) ) );
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fbcon->margin.bottom = ( margin->bottom + ( ygap - ( ygap / 2 ) ) );
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fbcon->indent = ( ( fbcon->margin.top * pixel->stride ) +
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( fbcon->margin.left * pixel->len ) );
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/* Derive character geometry from pixel geometry */
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fbcon->character.width = ( width / FBCON_CHAR_WIDTH );
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fbcon->character.height = ( height / FBCON_CHAR_HEIGHT );
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fbcon->character.len = ( pixel->len * FBCON_CHAR_WIDTH );
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fbcon->character.stride = ( pixel->stride * FBCON_CHAR_HEIGHT );
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DBGC ( fbcon, "FBCON %p is pixel %dx%d, char %dx%d at "
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"[%d-%d),[%d-%d)\n", fbcon, fbcon->pixel->width,
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fbcon->pixel->height, fbcon->character.width,
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@ -662,6 +676,7 @@ int fbcon_init ( struct fbcon *fbcon, userptr_t start,
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err_picture:
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ufree ( fbcon->text.start );
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err_text:
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err_margin:
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return rc;
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}
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@ -28,6 +28,14 @@ struct console_configuration {
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unsigned int height;
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/** Colour depth */
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unsigned int bpp;
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/** Left margin */
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unsigned int left;
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/** Right margin */
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unsigned int right;
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/** Top margin */
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unsigned int top;
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/** Bottom margin */
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unsigned int bottom;
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/** Background picture, if any */
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struct pixel_buffer *pixbuf;
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};
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@ -145,6 +145,7 @@ struct fbcon {
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extern int fbcon_init ( struct fbcon *fbcon, userptr_t start,
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struct fbcon_geometry *pixel,
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struct fbcon_margin *margin,
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struct fbcon_colour_map *map,
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struct fbcon_font *font,
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struct pixel_buffer *pixbuf );
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