使用Brew 2.1 版本的sdk实现一个图片的任意角度旋转

[linyd]

以下网上找的图片任意角度旋转的实现代码
void PaintTransform(IBitmap * pBitMap, int nAngle, int nX, int nY)
{
AEEBitmapInfo BitmapInfo;

IBITMAP_GetInfo(pBitMap, &BitmapInfo, sizeof(AEEBitmapInfo));

AEETransformMatrix pMatrixTransform;

pMatrixTransform.A = 256;
pMatrixTransform.B = 0;
pMatrixTransform.C = 0;
pMatrixTransform.D = 256;

IBitmap* dst = NULL;
ITransform* pTransform = NULL;

IBITMAP_CreateCompatibleBitmap(pBitMap,&dst,BitmapInfo.cx,BitmapInfo.cy);

int neeor = IBITMAP_QueryInterface(dst,AEECLSID_TRANSFORM,(void**)&pTransform);

if ( pTransform )
{
ITRANSFORM_TransformBltComplex(pTransform, nX, nY, pBitMap, 0, 0, BitmapInfo.cx, BitmapInfo.cy, &pMatrixTransform, COMPOSITE_OPAQUE);
IDISPLAY_BitBlt(gpDC->getIDisplay(),nX, nY, BitmapInfo.cx, BitmapInfo.cy, dst,0,0,AEE_RO_COPY);
}

IBITMAP_Release(dst);
ITRANSFORM_Release(pTransform);
}


int neeor = IBITMAP_QueryInterface(dst,AEECLSID_TRANSFORM,(void**)&pTransform);
这个返回1，pTransform为空，初学brew，请高手帮忙看看怎么回事

[linyd]

up,没人回答吗

[raingo11]

创建实例应该用ISHELL_CreateInstance
int ISHELL_CreateInstance
(
IShell * pIShell,
AEECLSID cls,
void * * ppobj
)

参见API

[wishifef]

这是用你的代码写的例子，垂直翻转图片，效果出来了，你看看对你有帮助没

/*===========================================================================

FILE: testbmp.c
===========================================================================*/


/*===============================================================================
INCLUDES AND VARIABLE DEFINITIONS
=============================================================================== */
#include "AEEModGen.h"          // Module interface definitions
#include "AEEAppGen.h"          // Applet interface definitions
#include "AEEShell.h"           // Shell interface definitions
#include "AEETransform.h"
#include "AEEBitmap.h"
#include "AEEGraphics.h"
#include "testbmp.bid"


/*-------------------------------------------------------------------
Applet structure. All variables in here are reference via "pMe->"
-------------------------------------------------------------------*/
// create an applet structure that's passed around. All variables in
// here will be able to be referenced as static.
typedef struct _testbmp {
	AEEApplet      a ;	       // First element of this structure must be AEEApplet
    AEEDeviceInfo  DeviceInfo; // always have access to the hardware device information

    // add your own variables here...

	IShell *pIShell;
	IDisplay *pIDisplay;
	IGraphics *piGraphic;
	IBitmap *srcBmp;
	IBitmap *newBmp;

} testbmp;

/*-------------------------------------------------------------------
Function Prototypes
-------------------------------------------------------------------*/
static  boolean testbmp_HandleEvent(testbmp* pMe, AEEEvent eCode, 
                                             uint16 wParam, uint32 dwParam);
boolean testbmp_InitAppData(testbmp* pMe);
void    testbmp_FreeAppData(testbmp* pMe);
void Start(testbmp* pMe);

/*===============================================================================
FUNCTION DEFINITIONS
=============================================================================== */

/*===========================================================================

===========================================================================*/
int AEEClsCreateInstance(AEECLSID ClsId, IShell *pIShell, IModule *po, void **ppObj)
{
	*ppObj = NULL;

	if( ClsId == AEECLSID_TESTBMP )
	{
		// Create the applet and make room for the applet structure
		if( AEEApplet_New(sizeof(testbmp),
                          ClsId,
                          pIShell,
                          po,
                          (IApplet**)ppObj,
                          (AEEHANDLER)testbmp_HandleEvent,
                          (PFNFREEAPPDATA)testbmp_FreeAppData) ) // the FreeAppData function is called after sending EVT_APP_STOP to the HandleEvent function
                          
		{
			//Initialize applet data, this is called before sending EVT_APP_START
            // to the HandleEvent function
			if(testbmp_InitAppData((testbmp*)*ppObj))
			{
				//Data initialized successfully
				return(AEE_SUCCESS);
			}
			else
			{
				//Release the applet. This will free the memory allocated for the applet when
				// AEEApplet_New was called.
				IAPPLET_Release((IApplet*)*ppObj);
				return EFAILED;
			}

        } // end AEEApplet_New

    }

	return(EFAILED);
}


/*===========================================================================

===========================================================================*/
static boolean testbmp_HandleEvent(testbmp* pMe, AEEEvent eCode, uint16 wParam, uint32 dwParam)
{  

    switch (eCode) 
	{
        // App is told it is starting up
        case EVT_APP_START:                        
		    // Add your code here...
			Start(pMe);
            return(TRUE);


        // App is told it is exiting
        case EVT_APP_STOP:
            // Add your code here...

      		return(TRUE);


        // App is being suspended 
        case EVT_APP_SUSPEND:
		    // Add your code here...

      		return(TRUE);


        // App is being resumed
        case EVT_APP_RESUME:
		    // Add your code here...

      		return(TRUE);


        // An SMS message has arrived for this app. Message is in the dwParam above as (char *)
        // sender simply uses this format "//BREW:ClassId:Message", example //BREW:0x00000001:Hello World
        case EVT_APP_MESSAGE:
		    // Add your code here...

      		return(TRUE);

        // A key was pressed. Look at the wParam above to see which key was pressed. The key
        // codes are in AEEVCodes.h. Example "AVK_1" means that the "1" key was pressed.
        case EVT_KEY:
		    // Add your code here...

      		return(TRUE);


        // If nothing fits up to this point then we'll just break out
        default:
            break;
   }

   return FALSE;
}


// this function is called when your application is starting up
boolean testbmp_InitAppData(testbmp* pMe)
{
    pMe->DeviceInfo.wStructSize = sizeof(pMe->DeviceInfo);
    ISHELL_GetDeviceInfo(pMe->a.m_pIShell,&pMe->DeviceInfo);

    // Insert your code here for initializing or allocating resources...
	pMe->pIShell=pMe->a.m_pIShell;
	pMe->pIDisplay=pMe->a.m_pIDisplay;
	ISHELL_CreateInstance( pMe->pIShell, AEECLSID_GRAPHICS, (void **)&pMe->piGraphic );


    // if there have been no failures up to this point then return success
    return TRUE;
}


void testbmp_FreeAppData(testbmp* pMe)
{


}

IBitmap* PaintTransform(testbmp* pMe,IBitmap * pBitMap, int nAngle, int nX, int nY)
{
	AEEBitmapInfo BitmapInfo;
	AEETransformMatrix pMatrixTransform;
	IBitmap* dst = NULL;
	ITransform* pTransform ;//= NULL;
	int neeor;

	IBITMAP_GetInfo(pBitMap, &BitmapInfo, sizeof(AEEBitmapInfo));

	pMatrixTransform.A = -256;
	pMatrixTransform.B = 0;
	pMatrixTransform.C = 0;
	pMatrixTransform.D = -256;
	
	neeor = IBITMAP_CreateCompatibleBitmap(pBitMap,&dst,BitmapInfo.cx,BitmapInfo.cy);

	neeor = IBITMAP_QueryInterface(dst,AEECLSID_TRANSFORM,(void**)&pTransform);

	if ( pTransform )
	{
		ITRANSFORM_TransformBltComplex(pTransform, 0, 0, pBitMap, 0, 0, BitmapInfo.cx, BitmapInfo.cy, &pMatrixTransform, COMPOSITE_OPAQUE); 
		IDISPLAY_BitBlt(pMe->pIDisplay,nX, nY, BitmapInfo.cx, BitmapInfo.cy, dst,0,0,AEE_RO_COPY); 
	}

	IBITMAP_Release(dst);
	ITRANSFORM_Release(pTransform);
}

void Start(testbmp* pMe)
{
	IBitmap       *pbmScreen = NULL;
    IBitmap       *pbmDib = NULL;
    NativeColor    color;
    AEEBitmapInfo  bi;
	
	pbmScreen = IDISPLAY_GetDestination(pMe->a.m_pIDisplay);
	IDISPLAY_ClearScreen(pMe->pIDisplay);


	pbmDib =	ISHELL_LoadBitmap(pMe->a.m_pIShell,"123.bmp");
	IBITMAP_GetInfo(pbmDib, &bi, sizeof(bi));
	IBITMAP_CreateCompatibleBitmap(pbmScreen, &pMe->srcBmp, (uint16)bi.cx, (uint16)bi.cy);
	IBITMAP_BltIn(pMe->srcBmp, 0, 0, (uint16)bi.cx, (uint16)bi.cy, pbmDib, 0, 0, AEE_RO_COPY);
	IBITMAP_Release(pbmDib);
	
	PaintTransform(pMe,pMe->srcBmp,20,0,50);
	IDISPLAY_BitBlt(pMe->pIDisplay, 0, 0, 58, 26, pMe->srcBmp, 0, 0, AEE_RO_TRANSPARENT); 
	IDISPLAY_Update(pMe->pIDisplay);
}

[吉祥衰宝]

在旋转时对于左上角的点不是（0,0）的旋转表示很纠结，

[strayedbird]

参考下面的图像旋转的介绍
https://developer.brewmp.com/cn/forum/%E5%9B%BE%E5%83%8F%E6%97%8B%E8%BD%AC%E6%8E%A5%E5%8F%A3itransform%E4%BB%8B%E7%BB%8D