# Copyright 2004-2012 Tom Rothamel <pytom@bishoujo.us>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# This used to hack pygame to support resolution-scaling. Now it just kinda
# sits here, to provide compatibility with what it used to be.

import pygame
import renpy.display
import renpy.display.pgrender as pgrender

import _renpy

##############################################################################
# The scaling API that's used if we don't enable scaling.
    
# Gets the real pygame surface.
def real(s):
    return s

# Scales the number, n.
def scale(n):
    return n

def real_bilinear(src, size):
    rv = pgrender.surface_unscaled(size, src)
    renpy.display.module.bilinear_scale(src, rv)
    return rv

# Does pygame.transform.scale.
def real_transform_scale(surf, size):
    return pgrender.transform_scale_unscaled(surf, size)

# Loads an image, without scaling it.
def image_load_unscaled(f, hint, convert=True):
    rv = pgrender.load_image_unscaled(f, hint)
    return rv

# Saves an image without rescaling.
def image_save_unscaled(surf, filename):
    pygame.image.save(surf, renpy.exports.fsencode(filename))

# Scales down a surface.
def surface_scale(full):
    return full

real_renpy_pixellate = _renpy.pixellate
real_renpy_transform = _renpy.transform

def real_smoothscale(src, size, dest=None):
    """
    This scales src up or down to size. This uses both the pixellate
    and the transform operations to handle the scaling.
    """

    width, height = size
    srcwidth, srcheight = src.get_size()
    iwidth, iheight = srcwidth, srcheight

    if dest is None:
        dest = pgrender.surface_unscaled(size, src)

    if width == 0 or height == 0:
        return dest

    xshrink = 1
    yshrink = 1

    while iwidth >= width * 2:
        xshrink *= 2
        iwidth /= 2

    while iheight >= height * 2:
        yshrink *= 2
        iheight /= 2

    if iwidth != srcwidth or iheight != srcheight:
        inter = pgrender.surface_unscaled((iwidth, iheight), src)
        real_renpy_pixellate(src, inter, xshrink, yshrink, 1, 1)
        src = inter

    real_renpy_transform(src, dest,
                         0, 0,
                         1.0 * iwidth / width , 0,                             
                         0, 1.0 * iheight / height,
                         precise=1,
                         )

    return dest
    
smoothscale = real_smoothscale
    
