ios/shared/ios_sharedlo/objective_c/render/MLORenderBuffer.m

   1 // -*- Mode: ObjC; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 //
   3 // This file is part of the LibreOffice project.
   4 //
   5 // This Source Code Form is subject to the terms of the Mozilla Public
   6 // License, v. 2.0. If a copy of the MPL was not distributed with this
   7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8
   9 #import "MLORenderBuffer.h"
  10 #import "MLORenderManager_Impl.h"
  11 #import "mlo_utils.h"
  12 #import <QuartzCore/QuartzCore.h>
  13 #include <touch/touch.h>
  14
  15 @interface  MLORenderBuffer ()
  16 @property MLORenderManager * manager;
  17 @end
  18 static const CGFloat
  19     MIN_AVERAGE_RENDER_TIME_THRESHOLD=1.0f/100.0f,
  20     MIN_FPS=10.0f;
  21
  22 static const NSTimeInterval SCALING_ANIMATION_DURATION = 0.02f;
  23
  24 static CGFloat averageFps,maxFps;
  25 @implementation MLORenderBuffer
  26
  27 -(id)initWithArrayIndex:(NSInteger) index renderManager:(MLORenderManager *) manager{
  28     self= [self init];
  29     if(self){
  30         self.index = index;
  31         self.manager = manager;
  32         self.backgroundColor = [UIColor whiteColor];
  33         self.previous = nil;
  34     }
  35     return self;
  36 }
  37
  38 -(void)hide{
  39     self.alpha = 0;
  40     [self resetTransform];
  41 }
  42
  43 -(void)setNeedsDisplayInRect:(CGRect)rect{
  44     [self resetTransform];
  45     [super setNeedsDisplayInRect:rect];
  46 }
  47
  48 -(void) resetTransform{
  49     if(self.frame.origin.x ||self.frame.origin.y ){
  50         self.frame = CGRectMake(0,0,_manager.bufferFrame.size.width,_manager.bufferFrame.size.height);
  51     }
  52 }
  53
  54 - (void)drawRect:(CGRect)rect
  55 {
  56     if(ENABLE_LO_DESKTOP){
  57         CGContextRef context = UIGraphicsGetCurrentContext();
  58
  59         //rect = self.frame;
  60         LOG_RECT(rect, @"drawRect");
  61
  62         CGContextSaveGState(context);
  63         CGContextSetFillColorWithColor(context,[UIColor whiteColor].CGColor);
  64         CGContextTranslateCTM(context, 0, _manager.bufferFrame.size.height);
  65         CGContextScaleCTM(context, 1, -1);
  66         CGContextScaleCTM(context, 1, 1);
  67         NSDate *startDate = [NSDate date];
  68
  69         [_manager loRenderWillBegin];
  70
  71         touch_lo_render_windows(context, rect.origin.y, rect.origin.y, rect.size.width, rect.size.height);
  72
  73         CGContextRestoreGState(context);
  74
  75         CGFloat duration =  [[NSDate date] timeIntervalSinceDate: startDate];
  76
  77         maxFps = max(maxFps,1.0f/duration);
  78
  79         static float totalTime = 0,counter = 0;
  80
  81         totalTime +=duration;
  82         counter++;
  83
  84         CGFloat averageTime = totalTime / counter;
  85         if(averageTime >MIN_AVERAGE_RENDER_TIME_THRESHOLD){
  86             averageFps = 1.0f/ averageTime;
  87         }
  88
  89         if(LOG_DRAW_RECT){
  90             NSLog(@"drawRect: lo_render_windows: time=%f sec, average=%f sec, fps=%f",
  91                   duration, averageTime, averageFps);
  92         }
  93         if(_manager.currentGesture != PINCH){
  94             [_manager swapPreviousBuffer:_previous withNextBuffer:self];
  95         }
  96     }
  97 }
  98
  99 +(CGFloat) getAverageFps{
 100     return max(averageFps, MIN_FPS);
 101 }
 102
 103 +(CGFloat) getMaxFps{
 104     return max(maxFps, MIN_FPS);
 105 }
 106
 107 @end