;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10; Package: photo -*-
;;;; *************************************************************************
;;;; FILE IDENTIFICATION
;;;;
;;;; Name:          cameras.lisp
;;;; Purpose:       Camera-specific data for cl-photo
;;;; Programmer:    Kevin M. Rosenberg
;;;; Date Started:  April 2005
;;;;
;;;; $Id: dof.lisp 10421 2005-04-19 21:57:00Z kevin $
;;;;
;;;; This file, part of cl-photo, is Copyright (c) 2005 by Kevin M. Rosenberg
;;;;
;;;; cl-photo users are granted the rights to distribute and use this software
;;;; as governed by the terms of the GNU General Public License v2
;;;; (http://www.gnu.org/licenses/gpl.html)
;;;;
;;;; *************************************************************************

(in-package #:photo)

(defun sensor-dimensions-megapixels (format megapixels)
  (let* ((dim (format-dimensions format))
         (aspect-ratio (/ (car dim) (cdr dim)))
         (width (round (sqrt (* aspect-ratio 1000000 megapixels)))))
    (cons width (round (/ width aspect-ratio)))))


(defun sensor-dimensions (sensor-spec &key (format :aps))
  "Returns the number of pixels for a sensor. 
CAMERA-SPEC is either a keyword designating the camera or
the number of megapixels of the sensor.
FORMAT should be defined if the CAMERA-SPEC is the number of megapixels
so the proper aspect ratio is used."
  (etypecase sensor-spec
    (keyword
     (ecase sensor-spec
       ;; nikon
       (:d2x (cons 4288 2848))
       (:d100 (cons 3037 2024))
       (:d2h (cons 2464 1632))
       (:d70 (cons 3008 2000))

       ;; canon
       (:1d (cons 2464 1648))
       (:1d2 (cons 3504 2336))
       (:1ds (cons 4064 2704))
       (:1ds2 (cons 4992 3328))

       ))
    (number
     (sensor-dimensions-megapixels format sensor-spec))))


(defun format-dimensions (format)
  "Returns format dimensions in mm."
  (ecase format
    (:aps-c (cons 22.7 15.1))
    ((:aps :dx :24x16mm) (cons 24 16))
    ((:35mm :36x24mm) (cons 36 24))
    (:6x4.5cm (cons 60 45))
    ((:6x6 :6x6cm) (cons 60 60))
    ((:6x7 :6x7cm) (cons 60 70))
    ((:6x9 :6x9cm) (cons 60 90))
    ((:4x5 :4x5in) (cons (* 4 +inches->mm+) (* 5 +inches->mm+)))
    ((:5x7 :5x7in) (cons (* 5 +inches->mm+) (* 7 +inches->mm+)))
    ((:8x10 :8x10in) (cons (* 8 +inches->mm+) (* 10 +inches->mm+))) 
    (:11x13.75in (cons (* 11 +inches->mm+) (* 13.75 +inches->mm+)))
    (:11x16.5in (cons (* 11 +inches->mm+) (* 16.5 +inches->mm+)))
    (:13x19in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    (:16x20in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    (:16x24in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    (:18x22.5in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    (:18x24in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    (:24x30in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    (:24x36in (cons (* 13 +inches->mm+) (* 19 +inches->mm+)))
    ))