BitmapData issue

I am trying to cut up a displayObject into bitmapdata chuncks and then shove those chuncks into List with an ItemRenderer, but I seem to having an issue. Here is my stack dump.
ArgumentError: Error #2015: Invalid BitmapData.
    at flash.display::BitmapData/get width()
    at spark.primitives::BitmapImage/measure()[E:\dev\gumbo_beta2\frameworks\projects\spark\src\ spark\primitives\BitmapImage.as:339]
    at spark.primitives.supportClasses::GraphicElement/measureSizes()[E:\dev\gumbo_beta2\framewo rks\projects\spark\src\spark\primitives\supportClasses\GraphicElement.as:3563]
    at spark.primitives.supportClasses::GraphicElement/validateSize()[E:\dev\gumbo_beta2\framewo rks\projects\spark\src\spark\primitives\supportClasses\GraphicElement.as:3525]
    at spark.components::Group/validateSize()[E:\dev\gumbo_beta2\frameworks\projects\spark\src\s park\components\Group.as:791]
    at mx.managers::LayoutManager/validateClient()[E:\dev\gumbo_beta2\frameworks\projects\framew ork\src\mx\managers\LayoutManager.as:888]
    at mx.core::UIComponent/validateNow()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\m x\core\UIComponent.as:7249]
    at spark.components::DataGroup/initializeTypicalItem()[E:\dev\gumbo_beta2\frameworks\project s\spark\src\spark\components\DataGroup.as:247]
    at spark.components::DataGroup/ensureTypicalLayoutElement()[E:\dev\gumbo_beta2\frameworks\pr ojects\spark\src\spark\components\DataGroup.as:266]
    at spark.components::DataGroup/updateDisplayList()[E:\dev\gumbo_beta2\frameworks\projects\sp ark\src\spark\components\DataGroup.as:1056]
    at mx.core::UIComponent/validateDisplayList()[E:\dev\gumbo_beta2\frameworks\projects\framewo rk\src\mx\core\UIComponent.as:8065]
    at mx.managers::LayoutManager/validateClient()[E:\dev\gumbo_beta2\frameworks\projects\framew ork\src\mx\managers\LayoutManager.as:931]
    at mx.core::UIComponent/validateNow()[E:\dev\gumbo_beta2\frameworks\projects\framework\src\m x\core\UIComponent.as:7249]
    at mx.managers::PopUpManagerImpl/centerPopUp()[E:\dev\gumbo_beta2\frameworks\projects\framew ork\src\mx\managers\PopUpManagerImpl.as:472]
    at mx.managers::PopUpManager$/centerPopUp()[E:\dev\gumbo_beta2\frameworks\projects\framework \src\mx\managers\PopUpManager.as:204]
    at com.utils::PopManager$/openPopUpWindow()[/Users/work/src/com/utils/PopManager.as:34]
    at com.controller::HandlePopCommand/execute()[/Users//controller/HandlePopCommand.as:316]
    at org.puremvc.as3.core::Controller/executeCommand()[C:\Documents and Settings\Owner.CapricornOne\My Documents\My Workspaces\PureMVC\PureMVC_AS3\src\org\puremvc\as3\core\Controller.as:115]
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at org.puremvc.as3.patterns.observer::Observer/notifyObserver()[C:\Documents and Settings\Owner.CapricornOne\My Documents\My Workspaces\PureMVC\PureMVC_AS3\src\org\puremvc\as3\patterns\observer\Observer.as:100]
    at org.puremvc.as3.core::View/notifyObservers()[C:\Documents and Settings\Owner.CapricornOne\My Documents\My Workspaces\PureMVC\PureMVC_AS3\src\org\puremvc\as3\core\View.as:126]
    at org.puremvc.as3.patterns.facade::Facade/notifyObservers()[C:\Documents and Settings\Owner.CapricornOne\My Documents\My Workspaces\PureMVC\PureMVC_AS3\src\org\puremvc\as3\patterns\facade\Facade.as:404]
    at org.puremvc.as3.patterns.facade::Facade/sendNotification()[C:\Documents and Settings\Owner.CapricornOne\My Documents\My Workspaces\PureMVC\PureMVC_AS3\src\org\puremvc\as3\patterns\facade\Facade.as:387]
    at org.puremvc.as3.patterns.observer::Notifier/sendNotification()[C:\Documents and Settings\Owner.CapricornOne\My Documents\My Workspaces\PureMVC\PureMVC_AS3\src\org\puremvc\as3\patterns\observer\Notifier.as:49]
    at com.view::StageMediator/onPrintClicked()[/Users/work/src/com/view/StageMediator.as:178]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at mx.core::UIComponent/dispatchEvent()[E:\dev\gumbo_beta2\frameworks\projects\framework\src \mx\core\UIComponent.as:11749]
    at com.view.components::CustomGreyNavControlBar/sendEvent()[/User/work/src/com/view/componen ts/CustomGreyNavControlBar.mxml:356]
    at com.view.components::CustomGreyNavControlBar/handlePrintClick()[/Users/work/src/com/view/ components/CustomGreyNavControlBar.mxml:267]
    at com.view.components::CustomGreyNavControlBar/__printButton_click()[/Users/work/src/com/vi ew/components/CustomGreyNavControlBar.mxml:538]

Got it. I was calling .dispose and I guess the bitmapdata reference was being
disposed before it was being shoved in the List. So commeted out .dispose and all works.
J

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com.adobe.ac.mxeffects::SimpleDistortion/initDistortImage()[C:\workspaces\flex2.0.1\AlexF lexLibrary\com\adobe\ac\mxeffects\SimpleDistortion.as:501]
at
com.adobe.ac.mxeffects::SimpleDistortion/renderSides()[C:\workspaces\flex2.0.1\AlexFlexLi brary\com\adobe\ac\mxeffects\SimpleDistortion.as:357]
at
com.adobe.ac.mxeffects::SimpleDistortion/flipFront()[C:\workspaces\flex2.0.1\AlexFlexLibr ary\com\adobe\ac\mxeffects\SimpleDistortion.as:98]
at
com.adobe.ac.mxeffects.effectClasses::FlipInstance/updateFront()[C:\workspaces\flex2.0.1\ AlexFlexLibrary\com\adobe\ac\mxeffects\effectClasses\FlipInstance.as:46]
at mx.effects::Tween/
http://www.adobe.com/2006/flex/mx/internal::doInterval()[C:\dev\flex_201_gmc\sdk\framework s\mx\effects\Tween.as:567
at
mx.effects::Tween$/timerHandler()[C:\dev\flex_201_gmc\sdk\frameworks\mx\effects\Tween.as: 177]
at flash.utils::Timer/_timerDispatch()
at flash.utils::Timer/tick()

Hi,
I've been searching all over for someone having the same
problem that I am.
I'm seeing nearly the same thing that you are. I have
SWFVerification turned on and the swf copied over to the correct
directory. If I stream an FLV and attempt to capture grab the
bitmap data it works fine. Always.
If I try the same thing with a .mov or .mp4 file it mostly
works, but sometimes (after doing basically the same thing you've
described in your message), I get the SecurityError. If I try again
after a delay of a few seconds, sometimes it works. When that
doesn't work, if I seek a 1/10th of a second ahead in the video
then try again, it almost always works. But sometimes that, too,
fails.
Have you found a reliable solution to your problem? Has
anyone else seen this issue? I would file a bug for FMS, but it
looks like the bug-tracking system for FMS is not public. It would
be nice for it to be public.
regards,
david

Help with Video Performance Issues using Flash

Asking on behalf of a customer who has been unable to get any answers so far - are you able to help?
Background:
We have a port of our Game Development Kit which allows us to recompile all our games using Crossbridge (http://adobe-flash.github.io/crossbridge/) into SWF without any code modifications.
Overview:
Our framework is using OpenGL for rendering and we have successfully ported it along with the audio and video to run in Flash.
We are experiencing performance issues using Video. We cannot use image sequence as some of the video animations are too long and would increase the download to an unacceptable size. Assets vary between 256x256 - 1024x1024 videos.

Here's the rest of the story. Let me know if you can see any resolution, and I will connect him to the forums. Thank you.
Current Video Solution:
We create an instance of NetConnection, NetStream, and Video according to most samples out there, and invoke draw to rasterize the Video DisplayObject into a BitmapData instance.
The BitmapData instance has a fixed color component layout which is not compatible with Stage3D texture and is therefore has to be reformatted before uploaded to Stage3D Texture (See Code Listing below).
Our Problems:
Performance issues with RGBA conversion (either using copyChannel or manually reformatting is not fast enough) natively in as3; this required for stage3d texture.Copying each channel individual using bitmapdata.Copychannel seems faster, but not significantly faster.
Cannot detect when video frame has been updated, therefore we may copy pixels that are not needed in enterframe (processpixel).
Looping video, our current solution uses the NET_STATUS event Buffer empty; Is there a better way to loop videos than checking buffer and seeking to 0.
Stepping video, loading FLV or MP4 side by side assets from HTTP or embedded does not support stepping? Is there another way?
ActionScript Code Listing:
video_nc = new NetConnection();
video_nc.addEventListener(NetStatusEvent.NET_STATUS , onConnect);
video_nc.addEventListener(AsyncErrorEvent.ASYNC_ERROR , trace);
video_nc.connect(null);
// OnConnect Event:
this.ns = new NetStream(e.target as NetConnection);
eventclient = new Object();
eventclient.onMetaData = onMetaData;
this.ns.client = eventclient;
ns.play(flvfile);
ns.pause();
//onMetaData event:
this.width = infoObject.width;
this.height = infoObject.height;
this.textureWidth = NextPowerOfTwo(this.width);
this.textureHeight = NextPowerOfTwo(this.height);
cliprect = new Rectangle(0, 0, this.width ,this.height);
cliprect.x = 0;
cliprect.y = 0;
cliprect.width = this.textureWidth;
cliprect.height = this.textureHeight;
totalFrames = infoObject.duration * infoObject.fps;
this.hasAlpha = true;
if(infoObject.videocodecid == 5)
this.hasAlpha = true;
this.bitmapData = new BitmapData(this.textureWidth, this.textureHeight, hasAlpha, 0xff000000);
this.video = new Video(this.width, this.height);
this.video.attachNetStream(ns);
this.video.addEventListener(Event.ENTER_FRAME, processPixels);
// processPixel method:
BitmapData.draw(video);
GLAPI.instance.glBindTexture(GLAPI.GL_TEXTURE_2D,this.textureId);
var fmt:uint = GLAPI.GL_ARGB;
// converting pixels using copychannel or loop through pixels
GLAPI.instance.glBindTexture(GLAPI.GL_TEXTURE_2D,this.textureId);
GLAPI.instance.glTexImage2D(GLAPI.GL_TEXTURE_2D, 0, fmt, this.textureWidth, this.textureHeight, 0,fmt, GLAPI.GL_UNSIGNED_BYTE, 0, convBitmapData.getPixels(cliprect));

Image Transperancy in bitmapData

Folloing are the excerpts of my code in AS2:
I have image1 as and image2 on my stage. The image2 is a
transparent GIF and works good transparantly when moved, roatated
etc. this image2 is merged over image1 on a button click instance.
Problem with the source is that as soon as the image is
merged it (image2) looses its transparancy and converted to opaque
again. How to resolve this issue?

thanks roth! u people are really great, how and where from do
u learn all this?
One more problem,
JPG is loaded in my MC, I resized it on rollover to fit on my
required diameter, but when i merge this resized MC/JPG using
BitmapData, the MC does not change but the jpg takes back its
original size which caused trimmed graphic to display on merged
image. I know i am doing something wrong but what and where i dont
know. pl help

HTTP Streaming and BitmapData.draw

Hi OSMF Experts,
I've tried to duplicate segments of a Video with BitmapData.draw.
It's working with RTMP (set videoSampleAccess server side).
Progressive is also working (crossdomain.xml is ok).
BitmapData.draw doesn't work with HTTP Streaming! (Using *.f4m). What's the way to get this working? Following Error is thrown:
SecurityError: Error #2123: Verletzung der Sicherheits-Sandbox: BitmapData.draw: file:///C|/players/myVideoTestHTTP.swf kann nicht auf null zugreifen. Es haben keine Richtliniendateien Zugriff gewährt.
I've used OSMF 2.0 for the Tests. And I've testet with the sample.mp4/manifest.f4m example.
Thanks for your answers.
Greets
Martin

Have you seen bug CSCdx31582- Macintosh wont play WMT from CE (ecdn). Guess this is similar to the issue that you have.

Can't use memory allocated in C to write then read BitmapData in AS

Hi all,
I've been attempting to use Alchemy to allocate a chunk of memory in C, and then write a bitmap to the memory (via getPixels) which is I would then be able to modify using my super fast C image processing functions. I've been following the "Memory allocation in C with direct access in Actionscript (FAST!!)" section from here.
The problem is that when I allocate the memory in C, then try to display the image using setImage, all I see is a black box on the screen. The code below shows how I use getPixels to fill the C memory region with my bitmap data, then use setPixels to fill the BitmapData object which is displayed on the screen. Does anyone know what I'm doing wrong here? I've been really stuck on this
ActionScript variables, and event function which runs after my Bitmap is loaded
        private var _dataPosition:uint;
        private var displayedImage:Image;
        private var bmp:Bitmap;
public function loaded(e:Event):void {
            bmp = e.target.content as Bitmap;
            // A setImage at the beggining of this function properly displays my image
            displayedImage.setImage(bmp.bitmapData);
            var loader:CLibInit = new CLibInit();
            var lib:Object = loader.init();
            var ns:Namespace = new Namespace("cmodule.alchemyrgr");
            var byteArray:ByteArray = (ns::gstate).ds; //point to memory
            var tmpByteArray:ByteArray = new ByteArray();
            var imgSize:int = bmp.width * bmp.height * 4;
            _dataPosition = lib.initByteArray(imgSize); //This is the position of the data in memory
            var bounds:Rectangle = new Rectangle(0, 0, bmp.width, bmp.height);
            tmpByteArray = bmp.bitmapData.getPixels(bounds);
            byteArray.readBytes(tmpByteArray, 0, imgSize);
            byteArray.position = _dataPosition;
            bmp.bitmapData.setPixels(bounds, byteArray);
            displayedImage.setImage(bmp.bitmapData);
            //lib.clearByteArray(); //Free the bytearray
C memory allocation function
static AS3_Val initByteArray(void* self, AS3_Val args)
    AS3_ArrayValue(args, "IntType", &bufferSize);
    //Allocate buffer of size "bufferSize"
    buffer = (unsigned char*)malloc(bufferSize*sizeof(char));
    //return pointer to the location in memory
    return AS3_Int((int)buffer);
Thanks in advance!
Mark

Hi Mark,
I too attempted to use a method similar to yours to no avail. I posted my solution for passing bytearray data to/from alchemy here:
http://forums.adobe.com/thread/773517?tstart=0
There is full flash code and C++ code so you should be able to answer all your questions just by reading my post. However, one thing I see about how you're passing your pointer back to flash is:
    //return pointer to the location in memory
    return AS3_Int((int)buffer);
I think should be:
    //return pointer to the location in memory
    return AS3_Ptr(buffer);
You shouldn't be casting your char array as an int and returning it, just use AS3_Ptr(buffer) and that will return the actual memory address as an int to flash. I'm not 100% sure but I think this could be an issue. I use this method also in my code you can find in the link above so you can see the full implementation there. Hope that helps.

Inline functions in C, gcc optimization and floating point arithmetic issues

For several days I really have become a fan of Alchemy. But after intensive testing I have found several issues which I'd like to solve but I can't without any help.
So...I'm porting an old game console emulator written by me in ANSI C. The code is working on both gcc and VisualStudio without any modification or crosscompile macros. The only platform code is the audio and video output which is out of scope, because I have ported audio and video witin AS3.
Here are the issues:
1. Inline functions - Having only a single inline function makes the code working incorrectly (although not crashing) even if any optimization is enabled or not (-O0 or O3). My current workarround is converting the inline functions to macros which achieves the same effect. Any ideas why inline functions break the code?
2. Compiler optimizations - well, my project consists of many C files one of which is called flash.c and it contains the main and exported functions. I build the project as follows:
gcc -c flash.c -O0 -o flash.o     //Please note the -O0 option!!!
gcc -c file1.c -O3 -o file1.o
gcc -c file2.c -O3 -o file2.o
... and so on
gcc *.o -swc -O0 -o emu.swc   //Please note the -O0 option again!!!
mxmlc.exe -library-path+=emu.swc --target-player=10.0.0 Emu.as
or file in $( ls *.o ) //Removes the obj files
    do
        rm $file
    done
If I define any option different from -O0 in gcc -c flash.c -O0 -o flash.o the program stops working correctly exactly as in the inline funtions code (but still does not crash or prints any errors in debug). flash has 4 static functions to be exported to AS3 and the main function. Do you know why?
If I define any option different from -O0 in gcc *.o -swc -O0 -o emu.swc the program stops working correctly exactly as above, but if I specify -O1, -O2 or O3 the SWC file gets smaller up to 2x for O3. Why? Is there a method to optimize all the obj files except flash.o because I suspect a similar issue as when compilling it?
3. Flating point issues - this is the worst one. My code is mainly based on integer arithmetic but on 1-2 places it requires flating point arithmetic. One of them is the conversion of 16-bit 44.1 Khz sound buffer to a float buffer with same sample rate but with samples in the range from -1.0 to 1.0.
My code:
void audio_prepare_as()
    uint32 i;
    for(i=0;i<audioSamples;i+=2)
        audiobuffer[i] = (float)snd.buffer[i]/32768;
        audiobuffer[i+1] = (float)snd.buffer[i+1]/32768;
My audio playback is working perfectly. But not if using the above conversion and I have inspected the float numbers - all incorrect and invalid. I tried other code with simple floats - same story. As if alchemy refuses to work with floats. What is wrong? I have another lace whre I must resize the framebuffer and there I have a float involved - same crap. Please help me?
Found the floating point problem: audiobuffer is written to a ByteArray and then used in AS. But C floats are obviously not the same as those in AS3. Now the floating point is resolved.
The optimization issues remain! I really need to speed up my code.
Thank you in advice!

Dear Bernd,
I am still unable to run the optimizations and turn on the inline functions. None of the inline functions contain any stdli function just pure asignments, reads, simple arithmetic and bitwise operations.
In fact, the file containing the main function and those functions for export in AS3 did have memset and memcpy. I tried your suggestion and put the code above the functions calling memset and memcpy. It did not work soe I put the code in a header which is included topmost in each C file. The only system header I use is malloc.h and it is included topmost. In other C file I use pow, sin and log10 from math.h but I removed it and made the same thing:
//shared.h
#ifndef _SHARED_H_
#define _SHARED_H_
#include <malloc.h>
static void * custom_memmove( void * destination, const void * source, unsigned int num ) {
void *result;
__asm__("%0 memmove(%1, %2, %3)\n" : "=r"(result) : "r"(destination), "r"(source), "r"(num));
return result;
static void * custom_memcpy ( void * destination, const void * source, unsigned int num ) {
void *result;
__asm__("%0 memcpy(%1, %2, %3)\n" : "=r"(result) : "r"(destination), "r"(source), "r"(num));
return result;
static void * custom_memset ( void * ptr, int value, unsigned int num ) {
void *result;
__asm__("%0 memset(%1, %2, %3)\n" : "=r"(result) : "r"(ptr), "r"(value), "r"(num));
return result;
static float custom_pow(float x, int y) {
    float result;
__asm__("%0 pow(%1, %2)\n" : "=r"(result) : "r"(x), "r"(y));
return result;
static double custom_sin(double x) {
    double result;
__asm__("%0 sin(%1)\n" : "=r"(result) : "r"(x));
return result;
static double custom_log10(double x) {
    double result;
__asm__("%0 log10(%1)\n" : "=r"(result) : "r"(x));
return result;
#define memmove custom_memmove
#define memcpy custom_memcpy
#define memset custom_memset
#define pow custom_pow
#define sin custom_sin
#define log10 custom_log10
#include "types.h"
#include "macros.h"
#include "m68k.h"
#include "z80.h"
#include "genesis.h"
#include "vdp.h"
#include "render.h"
#include "mem68k.h"
#include "memz80.h"
#include "membnk.h"
#include "memvdp.h"
#include "system.h"
#include "loadrom.h"
#include "input.h"
#include "io.h"
#include "sound.h"
#include "fm.h"
#include "sn76496.h"
#endif /* _SHARED_H_ */
It still behave the same way as if nothing was changed (works incorrectly - displays jerk which does not move, whereby the image is supposed to move)
As I am porting an emulator (Sega Mega Drive) I use manu arrays of function pointers for implementing the opcodes of the CPU's. Could this be an issue?
I did a workaround for the floating point problem but processing is very slow so I hear only bzzt bzzt but this is for now out of scope. The emulator compiled with gcc runs at 300 fps on a 1.3 GHz machine, whereby my non optimized AVM2 code compiled by alchemy produces 14 fps. The pure rendering is super fast and the problem lies in the computational power of AVM. The frame buffer and the enulation are generated in the C code and only the pixels are copied to AS3, where they are plotted in a BitmapData. On 2.0 GHz Dual core I achieved only 21 fps. Goal is 60 fps to have smooth audio and video. But this is offtopic. After all everything works (slow) without optimization, and I would somehow turn it on. Suggestions?
Here is the file with the main function:
#include "shared.h"
#include "AS3.h"
#define FRAMEBUFFER_LENGTH    (320*240*4)
static uint8* framebuffer;
static uint32 audioSamples;
AS3_Val sega_rom(void* self, AS3_Val args)
    int size, offset, i;
    uint8 hardware;
    uint8 country;
    uint8 header[0x200];
    uint8 *ptr;
    AS3_Val length;
    AS3_Val ba;
    AS3_ArrayValue(args, "AS3ValType", &ba);
    country = 0;
    offset = 0;
    length = AS3_GetS(ba, "length");
    size = AS3_IntValue(length);
    ptr = (uint8*)malloc(size);
    AS3_SetS(ba, "position", AS3_Int(0));
    AS3_ByteArray_readBytes(ptr, ba, size);
    //FILE* f = fopen("boris_dump.bin", "wb");
    //fwrite(ptr, size, 1, f);
    //fclose(f);
    if((size / 512) & 1)
        size -= 512;
        offset += 512;
        memcpy(header, ptr, 512);
        for(i = 0; i < (size / 0x4000); i += 1)
            deinterleave_block(ptr + offset + (i * 0x4000));
    memset(cart_rom, 0, 0x400000);
    if(size > 0x400000) size = 0x400000;
    memcpy(cart_rom, ptr + offset, size);
    /* Free allocated file data */
    free(ptr);
    hardware = 0;
    for (i = 0x1f0; i < 0x1ff; i++)
        switch (cart_rom[i]) {
     case 'U':
         hardware |= 4;
         break;
     case 'J':
         hardware |= 1;
         break;
     case 'E':
         hardware |= 8;
         break;
    if (cart_rom[0x1f0] >= '1' && cart_rom[0x1f0] <= '9') {
        hardware = cart_rom[0x1f0] - '0';
    } else if (cart_rom[0x1f0] >= 'A' && cart_rom[0x1f0] <= 'F') {
        hardware = cart_rom[0x1f0] - 'A' + 10;
    if (country) hardware=country; //simple autodetect override
    //From PicoDrive
    if (hardware&8)
        hw=0xc0; vdp_pal=1;
    } // Europe
    else if (hardware&4)
        hw=0x80; vdp_pal=0;
    } // USA
    else if (hardware&2)
        hw=0x40; vdp_pal=1;
    } // Japan PAL
    else if (hardware&1)
        hw=0x00; vdp_pal=0;
    } // Japan NTSC
    else
        hw=0x80; // USA
    if (vdp_pal) {
        vdp_rate = 50;
        lines_per_frame = 312;
    } else {
        vdp_rate = 60;
        lines_per_frame = 262;
    /*SRAM*/
    if(cart_rom[0x1b1] == 'A' && cart_rom[0x1b0] == 'R')
        save_start = cart_rom[0x1b4] << 24 | cart_rom[0x1b5] << 16 |
            cart_rom[0x1b6] << 8 | cart_rom[0x1b7] << 0;
        save_len = cart_rom[0x1b8] << 24 | cart_rom[0x1b9] << 16 |
            cart_rom[0x1ba] << 8 | cart_rom[0x1bb] << 0;
        // Make sure start is even, end is odd, for alignment
        // A ROM that I came across had the start and end bytes of
        // the save ram the same and wouldn't work. Fix this as seen
        // fit, I know it could probably use some work. [PKH]
        if(save_start != save_len)
            if(save_start & 1) --save_start;
            if(!(save_len & 1)) ++save_len;
            save_len -= (save_start - 1);
            saveram = (unsigned char*)malloc(save_len);
            // If save RAM does not overlap main ROM, set it active by default since
            // a few games can't manage to properly switch it on/off.
            if(save_start >= (unsigned)size)
                save_active = 1;
        else
            save_start = save_len = 0;
            saveram = NULL;
    else
        save_start = save_len = 0;
        saveram = NULL;
    return AS3_Int(0);
AS3_Val sega_init(void* self, AS3_Val args)
    system_init();
    audioSamples = (44100 / vdp_rate)*2;
    framebuffer = (uint8*)malloc(FRAMEBUFFER_LENGTH);
    return AS3_Int(vdp_rate);
AS3_Val sega_reset(void* self, AS3_Val args)
    system_reset();
    return AS3_Int(0);
AS3_Val sega_frame(void* self, AS3_Val args)
    uint32 width;
    uint32 height;
    uint32 x, y;
    uint32 di, si, r;
    uint16 p;
    AS3_Val fb_ba;
    AS3_ArrayValue(args, "AS3ValType", &fb_ba);
    system_frame(0);
    AS3_SetS(fb_ba, "position", AS3_Int(0));
    width = (reg[12] & 1) ? 320 : 256;
    height = (reg[1] & 8) ? 240 : 224;
    for(y=0;y<240;y++)
        for(x=0;x<320;x++)
            di = 1280*y + x<<2;
            si = (y << 10) + ((x + bitmap.viewport.x) << 1);
            p = *((uint16*)(bitmap.data + si));
            framebuffer[di + 3] = (uint8)((p & 0x1f) << 3);
            framebuffer[di + 2] = (uint8)(((p >> 5) & 0x1f) << 3);
            framebuffer[di + 1] = (uint8)(((p >> 10) & 0x1f) << 3);
    AS3_ByteArray_writeBytes(fb_ba, framebuffer, FRAMEBUFFER_LENGTH);
    AS3_SetS(fb_ba, "position", AS3_Int(0));
    r = (width << 16) | height;
    return AS3_Int(r);
AS3_Val sega_audio(void* self, AS3_Val args)
    AS3_Val ab_ba;
    AS3_ArrayValue(args, "AS3ValType", &ab_ba);
    AS3_SetS(ab_ba, "position", AS3_Int(0));
    AS3_ByteArray_writeBytes(ab_ba, snd.buffer, audioSamples*sizeof(int16));
    AS3_SetS(ab_ba, "position", AS3_Int(0));
    return AS3_Int(0);
int main()
    AS3_Val romMethod = AS3_Function(NULL, sega_rom);
    AS3_Val initMethod = AS3_Function(NULL, sega_init);
    AS3_Val resetMethod = AS3_Function(NULL, sega_reset);
    AS3_Val frameMethod = AS3_Function(NULL, sega_frame);
    AS3_Val audioMethod = AS3_Function(NULL, sega_audio);
    // construct an object that holds references to the functions
    AS3_Val result = AS3_Object("sega_rom: AS3ValType, sega_init: AS3ValType, sega_reset: AS3ValType, sega_frame: AS3ValType, sega_audio: AS3ValType",
        romMethod, initMethod, resetMethod, frameMethod, audioMethod);
    // Release
    AS3_Release(romMethod);
    AS3_Release(initMethod);
    AS3_Release(resetMethod);
    AS3_Release(frameMethod);
    AS3_Release(audioMethod);
    // notify that we initialized -- THIS DOES NOT RETURN!
    AS3_LibInit(result);
    // should never get here!
    return 0;

PNG transparency lost using event.target.loader.content.bitmapData

I load a png 24 (tripple checked alpha is ok)
override public function loadData():void
     var request:URLRequest = new URLRequest(url);
     var loader = new Loader();
     loader.contentLoaderInfo.addEventListener(Event.COMPLETE, imageloadedSuccess);
     loader.load(request);
public function imageloadedSuccess(e:Event):void
     showPNG(e.target.loader.content.bitmapData);
in Air 1.5 png (e.target.loader.content.bitmapData) has no transparency
same code using Flash 10 export transparency is there.
both of course loading same png file.
Is this a known issue?
I haven't tried yet using 2.0
is there a workarround to load external png and keep the transparency?
thx by advance
Fabrice

for each loader created, create a movieclip and add your loader to the movieclip. assign all the properties you want to retrieve later to the movieclip and assign your event listeners to the movieclip.

Cross domain policy file and BitmapData

Hey guys and gals, I'm having an issue with a Security error
when trying to access photos from an external site. I have a client
who is at siteA.com, who wants to load in photos from siteB.com,
siteC.com, and probably 100 other sites. He has permission to do so
from the other sites, but doesn't want to go through all the
trouble of asking each site to post a cross-domain policy file.
Please correct me if I'm wrong, but the way I understand it is, if
you want to simply load an image into a Loader object within a swf,
you're ok, but if you want to access the BitmapData, you will then
get a security error? My snippet of code that I believe is causing
the security error is
public function imageLoaded(e:Event):void {
var image:Bitmap = Bitmap(e.target.loader.content);
image.smoothing = true;
imageContainer.addChild(e.target.loader);
As you can tell, the reason why I want to access the Bitmap
itself is to apply smoothing. That is my main concern, I want to be
able to apply smooth transitions to these pictures that are loaded
in from external sites. My main goal is to load images externally,
then apply smooth transitions, so if you know of a way to get
around the security violations, that would be great. The only
work-around we have for this is to write a script that will load
all the images from the external sites onto the local server, as
this will be less work than getting the cross-domain policy file on
each server (if that's what it takes). Thanks in advance for
anybody who can shed some light on the subject.

If I understand you correctly, a 'helper' swf would be on the
site where the images are held, much like a cross-domain policy
file? I don't understand how that would be much different than
getting the external sites to add a cross-domain policy file on
their server. It sounds easier to just throw the cross-domain
policy file on the external site's server with '*' for the path of
allowed directories to load images from. I'm pretty new to the
cross-domain security issue, so I'm not sure. I don't understand
why it's a security risk to access the pixels of an image either...
anybody know about that? Just trying to figure out where to go from
here on this project. Thanks for the reply GWD, still looking for
some more feedback.

UIComponent - Remove All BitmapData

Hey,
I'm using a cool flex component developed by Ely Greenfield called DisplayShelf. The compnent is used to display images in a fashion similar to the iTunes coverflow component - http://www.quietlyscheming.com/blog/components/tutorial-displayshelf-component/. This DisplayShelf component extends UIComponent.
When I load more and more images into the DisplayShelf the performance begins to suffer, which I believe is due to the number of bitmap objects which are drawn as each image is added.
My question is:
Is there a way to completely remove all bitmap data from a UIComponent using the standard bitmapData.dispose() method or failing that is it possible to simply delete all UIComponent children from memory i.e. not to use removeAllChildren which still keeps them in memory?
Thanks
Adam
Flexchief

Hi Alexander,
Thanks a lot for your reply.
I've found that by setting up a small loop to remove any children from the UIComponent and then loading additional images thereafter, I can improve the performance of the component hugely. Could this be because GC is grabbing the unreferenced children once they have been removed?
In relation to your two suggestions: - Yep I've got all the related objects weak referenced as you mentioned but to be honest I was unsure about forcing GC invocation manually, partly because I really wasn't all that sure on how to do it, and because I had read some place that this was not really very good practice and could possibly cause some unwanted CPU processing issues?

BitmapData issue

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