uifw/ganes/src/HgVgHelper.cpp
branchRCL_3
changeset 56 d48ab3b357f1
child 59 978afdc0236f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uifw/ganes/src/HgVgHelper.cpp	Wed Sep 01 12:16:19 2010 +0100
@@ -0,0 +1,556 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:     
+*
+*/
+
+// INCLUDE FILES
+
+#include "HgVgHelper.h"
+#include "HgVgDrawBuffer.h"
+#include "HgVgImageCreator.h"
+
+#include <e32math.h>
+#include <gulicon.h>
+#include <fbs.h>
+#include <nvg.h>
+#include <AknIconHeader.h>
+#include <AknIconUtils.h>
+
+const TInt KVertexX(0);
+const TInt KVertexY(1);
+const TInt KVertexZ(2);
+const TInt KNumColorValues(4);
+const TInt KNumColorTransformValues(8);
+const VGfloat KColorByteToFloatFactor(255.0f);
+
+
+namespace HgVgHelper
+    {
+
+// ---------------------------------------------------------------------------
+// CreateNonMaskedVgImageL()
+// ---------------------------------------------------------------------------
+//     
+static VGImage CreateNonMaskedVgImageL( const CFbsBitmap& aBitmap )
+    {
+    TSize size = aBitmap.SizeInPixels();    
+    VGImage image = vgCreateImage(VG_sRGB_565, size.iWidth, size.iHeight,VG_IMAGE_QUALITY_NONANTIALIASED);        
+    
+    if ( image != VG_INVALID_HANDLE  ) // to check if the image was created 
+        {
+        if (aBitmap.DisplayMode() == EColor64K && !aBitmap.IsCompressedInRAM())
+            {
+            aBitmap.BeginDataAccess();
+            TInt stride = aBitmap.DataStride();
+            TUint8* ptr = (TUint8*)aBitmap.DataAddress();
+            
+            vgGetError(); // to zero the error flag
+            vgImageSubData (image, ptr, stride, VG_sRGB_565, 0, 0, size.iWidth, size.iHeight );
+            
+            if(vgGetError() != VG_NO_ERROR)
+                {
+                vgDestroyImage(image);
+                image = VG_INVALID_HANDLE;
+                }
+            aBitmap.EndDataAccess();
+            }
+        else
+            {
+            TSize size = aBitmap.SizeInPixels();
+            CHgVgDrawBuffer* temp = CHgVgDrawBuffer::NewL(size, EColor64K);
+            temp->Gc().BitBlt(TPoint(0,0), &aBitmap);
+            temp->GetDrawBufferToVgImage(size, TPoint(0,0), image, 
+                    VG_sRGB_565);
+            delete temp;        
+            }
+        }
+
+    return image;
+    }
+
+// ---------------------------------------------------------------------------
+// CreateMaskedVgImageL()
+// ---------------------------------------------------------------------------
+//     
+static VGImage CreateMaskedVgImageL( CFbsBitmap* aBitmap, CFbsBitmap* aMask )
+    {
+    TSize size = aBitmap->SizeInPixels();
+    CHgVgDrawBuffer* temp = CHgVgDrawBuffer::NewL(size, EColor16MA);
+    temp->Gc().SetDrawMode(CGraphicsContext::EDrawModeWriteAlpha);
+    temp->Gc().SetBrushColor(TRgb(0,0,0,0));
+    temp->Gc().Clear();
+    temp->Gc().BitBltMasked(TPoint(0,0), aBitmap, size, aMask, EFalse);
+    
+    VGImage image = vgCreateImage(VG_sRGBA_8888, size.iWidth, size.iHeight,VG_IMAGE_QUALITY_NONANTIALIASED);
+    temp->GetDrawBufferToVgImage(size, TPoint(0,0), image, 
+            VG_sARGB_8888);
+    
+    delete temp;
+    return image;
+    }
+    
+// ---------------------------------------------------------------------------
+// HgVgHelper::CreateVgImageFromIconL()
+// ---------------------------------------------------------------------------
+//     
+VGImage CreateVgImageFromIconL(const CGulIcon& aIcon)
+    {
+        
+    CFbsBitmap* bitmap = aIcon.Bitmap();
+    User::LeaveIfNull(bitmap);
+    CFbsBitmap* mask = aIcon.Mask();
+    
+    // if this is NVG image, rasterize it using 
+    // nvg engine
+    if (bitmap->ExtendedBitmapType() != KNullUid)
+        {
+        return CHgVgImageCreator::InstanceL()->RenderImageFromIconL(bitmap);
+        }
+    else
+        {
+        // otherwise just blit/copy to vg image.
+        if (mask)
+            {
+            return CreateMaskedVgImageL(bitmap, mask);
+            }
+        else
+            {
+            return CreateNonMaskedVgImageL(*bitmap); 
+            }
+        }
+    
+    }
+        
+// ---------------------------------------------------------------------------
+// HgVgHelper::Clamp()
+// ---------------------------------------------------------------------------
+//     
+VGfloat Clamp(VGfloat value, VGfloat min, VGfloat max)
+    {
+    VGfloat result = (value < min) ? min : value;
+    return (result > max) ? max : result;
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::Lerp()
+// ---------------------------------------------------------------------------
+//     
+VGfloat Lerp(VGfloat start, VGfloat end, VGfloat t)
+    {
+    return start * (1.0f - t) + end * t;
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::Abs()
+// ---------------------------------------------------------------------------
+//     
+VGfloat Abs(VGfloat value)
+    {
+    return (value < 0) ? -value : value;
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::CalculateBoudingRect()
+// ---------------------------------------------------------------------------
+//     
+void CalculateBoundingRect(TRect& aRect, VGfloat* aPoints, TInt aNumPoints, 
+        const TRect& aWindowRect)
+    {
+    TInt height = aWindowRect.Height();
+    
+    TPoint min((TInt)aPoints[0], height - (TInt)aPoints[1]);
+    TPoint max((TInt)aPoints[0], height - (TInt)aPoints[1]);
+    
+    for (TInt i = 0; i < aNumPoints; i++)
+        {
+        
+        TPoint temp((TInt)aPoints[i*2+0], height - (TInt)aPoints[i*2+1]);
+        
+        min.iX = (temp.iX < min.iX) ? temp.iX : min.iX;
+        max.iX = (temp.iX > max.iX) ? temp.iX : max.iX;
+
+        min.iY = (temp.iY < min.iY) ? temp.iY : min.iY;
+        max.iY = (temp.iY > max.iY) ? temp.iY : max.iY;
+
+        }
+    
+    // Top Left
+    aRect.iTl = min;
+    
+    // Bottom Right
+    aRect.iBr = max;        
+
+    }
+
+void TVertex::ProjectPoint(VGfloat aScreenWidth, VGfloat aScreenHeight, VGfloat aFov)
+    {
+    VGfloat hw = aScreenWidth * 0.5f;
+    VGfloat hh = aScreenHeight * 0.5f;
+    VGfloat alpha = aFov / 2.0f;
+    double tanAlpha;
+    Math::Tan(tanAlpha, alpha);
+    VGfloat d = hw / tanAlpha;    
+    iScreenX = (VGfloat)(hw + d * iTx / iTz);
+    iScreenY = (VGfloat)(hh + d * iTy / iTz);    
+    }
+
+void TVertex::TransformPoint(const TMatrix& aMatrix)
+    {
+    iTx = iX * aMatrix.iM[0][0] + iY * aMatrix.iM[1][0] + iZ * aMatrix.iM[2][0] + aMatrix.iM[3][0];
+    iTy = iX * aMatrix.iM[0][1] + iY * aMatrix.iM[1][1] + iZ * aMatrix.iM[2][1] + aMatrix.iM[3][1];
+    iTz = iX * aMatrix.iM[0][2] + iY * aMatrix.iM[1][2] + iZ * aMatrix.iM[2][2] + aMatrix.iM[3][2];
+    }
+
+TMatrix::TMatrix()
+    {
+    }
+
+TMatrix::TMatrix(const TMatrix& rhs)
+    {
+            (*this) = rhs;
+    }
+
+TMatrix::~TMatrix()
+    {
+    }
+
+TMatrix& TMatrix::operator=(const TMatrix& rhs)
+    {
+        for (int i = 0; i < 4; ++i)
+        {
+                for (int j = 0; j < 4; ++j)
+                {
+                        iM[i][j] = rhs.iM[i][j];
+                }
+        }
+        return *this;
+        }
+            
+void TMatrix::Identity()
+    {
+            iM[0][0] = 1.0f;
+            iM[0][1] = 0.0f;
+            iM[0][2] = 0.0f;
+            iM[0][3] = 0.0f;
+
+            iM[1][0] = 0.0f;
+            iM[1][1] = 1.0f;
+            iM[1][2] = 0.0f;
+            iM[1][3] = 0.0f;
+
+            iM[2][0] = 0.0f;
+            iM[2][1] = 0.0f;
+            iM[2][2] = 1.0f;
+            iM[2][3] = 0.0f;
+
+            iM[3][0] = 0.0f;
+            iM[3][1] = 0.0f;
+            iM[3][2] = 0.0f;
+            iM[3][3] = 1.0f;
+    }
+   
+       
+void TMatrix::Multiply(const TMatrix& rhs)
+    {
+        VGfloat temp[4][4];
+        for (int i = 0; i < 4; ++i)
+        {
+                for (int j = 0; j < 4; ++j)
+                {
+                        temp[i][j] =
+                        iM[i][0] * rhs.iM[0][j] +
+                        iM[i][1] * rhs.iM[1][j] +
+                        iM[i][2] * rhs.iM[2][j] +
+                        iM[i][3] * rhs.iM[3][j];
+                }
+        }
+        for (int i = 0; i < 4; ++i)
+        {
+                for (int j = 0; j < 4; ++j)
+                {
+                iM[i][j] = temp[i][j];
+                }
+        }
+    }
+    
+    
+void TMatrix::RotationX(VGfloat angle)
+    {
+    double sa, ca;
+    Math::Sin(sa, angle);
+    Math::Cos(ca, angle);
+
+    iM[0][0] = 1.0f;
+    iM[0][1] = 0.0f;
+    iM[0][2] = 0.0f;
+    iM[0][3] = 0.0f;
+
+    iM[1][0] = 0.0f;
+    iM[1][1] = ca;
+    iM[1][2] = sa;
+    iM[1][3] = 0.0f;
+
+    iM[2][0] = 0.0f;
+    iM[2][1] = -sa;
+    iM[2][2] = ca;
+    iM[2][3] = 0.0f;
+
+    iM[3][0] = 0.0f;
+    iM[3][1] = 0.0f;
+    iM[3][2] = 0.0f;
+    iM[3][3] = 1.0f;
+    }
+
+
+void TMatrix::RotationY(float angle)
+    {
+    double sa, ca;
+    Math::Sin(sa, angle);
+    Math::Cos(ca, angle);
+
+    iM[0][0] = ca;
+    iM[0][1] = 0.0f;
+    iM[0][2] = -sa;
+    iM[0][3] = 0.0f;
+
+    iM[1][0] = 0.0f;
+    iM[1][1] = 1.0f;
+    iM[1][2] = 0.0f;
+    iM[1][3] = 0.0f;
+
+    iM[2][0] = sa;
+    iM[2][1] = 0.0f;
+    iM[2][2] = ca;
+    iM[2][3] = 0.0f;
+
+    iM[3][0] = 0.0f;
+    iM[3][1] = 0.0f;
+    iM[3][2] = 0.0f;
+    iM[3][3] = 1.0f;
+    }
+
+void TMatrix::Scale(VGfloat aSx, VGfloat aSy, VGfloat aSz)
+    {
+    Identity();
+    iM[0][0] = aSx;
+    iM[1][1] = aSy;
+    iM[2][2] = aSz;
+    }
+
+void TMatrix::Translation(VGfloat aX, VGfloat aY, VGfloat aZ)
+{
+    Identity();
+
+    iM[3][0] = aX;
+    iM[3][1] = aY;
+    iM[3][2] = aZ;
+}
+
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::ComputeRotationMatrixByY
+// ---------------------------------------------------------------------------
+//     
+void ComputeRotationMatrixByY(VGfloat* matrix, VGfloat angle)
+    {
+    // Build rotation matrix around Y-axis
+    double sinrad, cosrad;
+    Math::Sin (sinrad, angle );
+    Math::Cos (cosrad, angle );
+    VGfloat sa = sinrad;
+    VGfloat ca = cosrad;
+
+    VGfloat rotMatrix[] =
+        {
+        ca, 0, sa, 
+        0, 1, 0, 
+        sa, 0, -ca
+        };
+
+    // copy to result.
+    for (int i = 0; i < 9; i++ )
+        matrix[i] = rotMatrix[i];    
+    }
+
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::MultiplyMatrix()
+// ---------------------------------------------------------------------------
+//     
+void MultiplyMatrix(VGfloat* aResult, VGfloat* aA, VGfloat* aB)
+    {
+    for (VGint i = 0; i < 3; ++i)
+        {
+            for (VGint j = 0; j < 3; ++j)
+            {
+                    aResult[i*3+j] =
+                    aA[j*3+0] * aB[i*3+0] +
+                    aA[j*3+1] * aB[i*3+1] +
+                    aA[j*3+2] * aB[i*3+2];
+            }
+        }
+    }
+
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::TransformVertex
+// ---------------------------------------------------------------------------
+//         
+void TransformVertex(const VGfloat* inVertex, VGfloat* outVertex, 
+        const VGfloat* matrix)
+    {
+    VGfloat x = inVertex[KVertexX];
+    VGfloat y = inVertex[KVertexY];
+    VGfloat z = inVertex[KVertexZ];
+
+    outVertex[KVertexX] = x * matrix[0] + y * matrix[3] + z * matrix[6];
+    outVertex[KVertexY] = x * matrix[1] + y * matrix[4] + z * matrix[7];
+    outVertex[KVertexZ] = x * matrix[2] + y * matrix[5] + z * matrix[8];
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::PerspectiveTransformVertex
+// ---------------------------------------------------------------------------
+//         
+void PerspectiveTransformVertex(VGfloat* aInVertex, VGfloat* aOutVertex,
+        VGfloat aScreenWidth, VGfloat aScreenHeight, VGfloat aFov)
+    {
+/*    VGfloat x = inVertex[KVertexX];
+    VGfloat y = inVertex[KVertexY];
+    VGfloat z = inVertex[KVertexZ];
+
+    outVertex[KVertexX] = screenWidth * 0.5f + fov * x / z;
+    outVertex[KVertexY] = screenHeight * 0.5f + fov * y / z;
+*/    
+    VGfloat hw = aScreenWidth * 0.5f;
+    VGfloat hh = aScreenHeight * 0.5f;
+    VGfloat alpha = aFov / 2.0f;
+    double tanAlpha;
+    Math::Tan(tanAlpha, alpha);
+    VGfloat d = hw / tanAlpha;    
+    aOutVertex[KVertexX] = (VGfloat)(hw + d * aInVertex[KVertexX] / aInVertex[KVertexZ]);
+    aOutVertex[KVertexY] = (VGfloat)(hh + d * aInVertex[KVertexY] / aInVertex[KVertexZ]);    
+        
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::DrawAlphaImage()
+// ---------------------------------------------------------------------------
+//         
+void DrawImage(VGImage aImage, 
+        const TPoint& aPos, const TRect& aWindowRect, TBool aCentered, TBool aLandscape)
+    {
+            
+    vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
+    vgLoadIdentity();
+    if (aLandscape)
+        {
+        vgTranslate(0.0f, 640.0f); 
+        vgRotate(-90.0f);
+        }
+
+    if (!aCentered)
+        {
+        vgScale(1, -1);
+        vgTranslate(aPos.iX, -(aWindowRect.Height() - aPos.iY));
+        }
+    else
+        {
+        VGint w = vgGetParameteri(aImage, VG_IMAGE_WIDTH);
+        VGint h = vgGetParameteri(aImage, VG_IMAGE_HEIGHT);        
+        vgTranslate(aPos.iX, (aWindowRect.Height() - aPos.iY));
+        vgScale(1, -1);        
+        vgTranslate(-(VGfloat)w/2,-(VGfloat)h/2);
+        }
+    
+    vgDrawImage(aImage);        
+
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::DrawImageColorized
+// ---------------------------------------------------------------------------
+//         
+void DrawImageColorized(VGImage aImage, const TRgb& aColor, 
+        const TPoint& aPos, const TRect& aWindowRect, TBool aCentered, TBool aLandscape)
+    {
+    
+    VGfloat values[] = { 1.0, 1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0 };
+    
+    values[0] = (VGfloat)aColor.Red() / KColorByteToFloatFactor;
+    values[1] = (VGfloat)aColor.Green() / KColorByteToFloatFactor;
+    values[2] = (VGfloat)aColor.Blue() / KColorByteToFloatFactor;
+    values[3] = (VGfloat)aColor.Alpha() / KColorByteToFloatFactor;
+            
+    vgSetfv(VG_COLOR_TRANSFORM_VALUES, KNumColorTransformValues, values);
+    vgSeti(VG_COLOR_TRANSFORM, VG_TRUE);
+    
+    HgVgHelper::DrawImage(aImage, aPos, aWindowRect, aCentered, aLandscape);
+
+    vgSeti(VG_COLOR_TRANSFORM, VG_FALSE);        
+    }
+
+
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::CreatePath()
+// ---------------------------------------------------------------------------
+//         
+VGPath CreatePath(VGuint aNumSegments, const VGubyte* aSegments, const VGfloat* aPoints)
+    {
+    VGPath path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 
+            1.0f, 0.0f, 4, 4, (unsigned int)VG_PATH_CAPABILITY_ALL);
+          
+    vgAppendPathData(path, aNumSegments, aSegments, aPoints);
+    
+    return path;
+    }
+    
+// ---------------------------------------------------------------------------
+// HgVgHelper::CreateColorPaint()
+// ---------------------------------------------------------------------------
+//         
+VGPaint CreateColorPaint(const VGfloat* aColor)
+    {
+    VGPaint paint = vgCreatePaint();
+    
+    vgSetParameteri(paint, VG_PAINT_TYPE, 
+        VG_PAINT_TYPE_COLOR);
+    
+    vgSetParameterfv(paint, VG_PAINT_COLOR,
+        KNumColorValues, aColor);        
+    
+    return paint;
+    }
+
+// ---------------------------------------------------------------------------
+// HgVgHelper::CreateColorPaint()
+// ---------------------------------------------------------------------------
+//         
+VGPaint CreateColorPaint(const TRgb& aColor)
+    {
+    VGfloat values[4];
+    
+    values[0] = (VGfloat)aColor.Red() / KColorByteToFloatFactor;
+    values[1] = (VGfloat)aColor.Green() / KColorByteToFloatFactor;
+    values[2] = (VGfloat)aColor.Blue() / KColorByteToFloatFactor;
+    values[3] = (VGfloat)aColor.Alpha() / KColorByteToFloatFactor;
+
+    return CreateColorPaint(values);
+    }
+
+    }
+
+// End of File