/****************************************************************************
** InitView() is called by PVRShell each time a rendering variable is changed
** in the Shell menu (Z-Buffer On/Off, resolution change, buffering mode...)
** In this function one should initialise all variables that are dependant on
** general rendering variables (screen mode, 3D device, etc...)
****************************************************************************/
bool OVGFont::InitView()
{
CPVRTPVGObject* pPVGObj;
VGImage vgImage;
VGImage vgChild;
float fW,fH;
PVRTVECTOR2 fGlyphOrigin, fEscapement;
// Store the screen width and height
m_ui32ScreenWidth = PVRShellGet(prefWidth);
m_ui32ScreenHeight = PVRShellGet(prefHeight);
// Set the clear colour
VGfloat afClearColour[] = { 0.6f, 0.8f, 1.0f, 1.0f };
vgSetfv(VG_CLEAR_COLOR, 4, afClearColour);
// Initialise PrintVG for the logo and the title
m_PrintVG.Initialize(m_ui32ScreenWidth, m_ui32ScreenHeight);
// Load the font path data from the pvg file
pPVGObj = CPVRTPVGObject::FromFile(c_szPVGFile);
if(pPVGObj == NULL)
{
PVRShellSet(prefExitMessage, "Error: Failed to load Font.pvg.");
return false;
}
if(pPVGObj->m_i32NumPaths != g_i32ImageCharNo)
{
PVRShellSet(prefExitMessage, "Error: Font.pvg doesn't contain the expected amount of characters.");
delete pPVGObj;
return false;
}
// Load the image based font data
if(PVRTImageLoadFromPVR(c_szPVRFile, &vgImage) != PVR_SUCCESS)
{
PVRShellSet(prefExitMessage, "Error: Failed to open mask.pvr.");
return false;
}
/*
Create two fonts. m_vgPathFont will purely contain glyphs represented by paths
and m_vgImageFont by images. It is also reasonable to have a font that contains
a mixture but we are keeping them seperate so they can be compared.
*/
m_vgImageFont = vgCreateFont(g_i32ImageCharNo);
m_vgPathFont = vgCreateFont(pPVGObj->m_i32NumPaths);
// Add the glyphs to the fonts.
for(int i = 0; i < g_i32ImageCharNo; ++i)
{
// Load glyph from path data
/*
Each path in the PVG file represents a glyph. First we need to acquire the origin
of the glyph so we use vgPathBounds to achieve this as the origin described in
g_CharDesc is for the image.
*/
vgPathBounds(pPVGObj->m_pPaths[i].m_path, &fGlyphOrigin.x, &fGlyphOrigin.y, &fW, &fH);
// We offset the origin so glyphs like a 'y' are lower
fGlyphOrigin.x += g_CharDesc[i].fOriginOffset.x;
fGlyphOrigin.y += g_CharDesc[i].fOriginOffset.y;
/*
Add the glyph and assign it a unique ID. The characters we're loading have ASCII codes ranging from
33 to 128 hence we're giving the glyphs IDs starting at 33. The glyph origin defines the coordinates
in path space at which to start drawing the glyph and the escapement character is the offset to start
drawing the next following character.
*/
vgSetGlyphToPath(m_vgPathFont, 33 + i, pPVGObj->m_pPaths[i].m_path, VG_TRUE, (VGfloat*) &fGlyphOrigin.x, (VGfloat*) &g_CharDesc[i].fEscapement.x);
// Load glyph from image data
/*
Using a child image we 'cut' the glyph out of the main image (see the child image training course for
an explanation).
*/
vgChild = vgChildImage(vgImage, g_CharDesc[i].i32Origin[0], g_CharDesc[i].i32Origin[1], g_CharDesc[i].i32Width, g_CharDesc[i].i32Height);
/*
We then add the child image to the font. We use the origin offset value directly for the value as the glyph's
origin is 0,0 within the child image.
*/
vgSetGlyphToImage(m_vgImageFont, 33 + i, vgChild, (VGfloat*) &g_CharDesc[i].fOriginOffset.x, (VGfloat*) &g_CharDesc[i].fEscapement.x);
// Destroy the child image as we no longer need it.
vgDestroyImage(vgChild);
}
// Destroy the image as it is no longer required
vgDestroyImage(vgImage);
// Destroy the PVG data as it too is no longer required
delete pPVGObj;
pPVGObj = 0;
// Space
/*
Glyphs such as spaces that do not have a visual representation can be added to
the fonts by passing VG_INVALID_HANDLE instead of a path or image handle.
*/
// Set the glyph origin and escapement for the space...
fGlyphOrigin.x = 0.0f;
fGlyphOrigin.y = 0.0f;
// ... We're giving the space a width of 10.0f
fEscapement.x = 10.0f;
fEscapement.y = 0.0f;
vgSetGlyphToImage(m_vgImageFont, 32, VG_INVALID_HANDLE, (VGfloat*) &fGlyphOrigin.x, (VGfloat*) &fEscapement.x);
vgSetGlyphToPath(m_vgPathFont, 32, VG_INVALID_HANDLE, VG_TRUE, (VGfloat*) &fGlyphOrigin.x, (VGfloat*) &fEscapement.x);
// Create font paint
m_vgFontPaint = vgCreatePaint();
vgSetParameteri(m_vgFontPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetColor(m_vgFontPaint, PVRTRGBA(255,0,0,255));
return true;
}
void QVGPixmapDropShadowFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
{
if (src.isNull())
return;
if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
// The pixmap data is not an instance of QVGPixmapData, so fall
// back to the default drop shadow filter implementation.
QPixmapDropShadowFilter::draw(painter, dest, src, srcRect);
return;
}
QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
VGImage srcImage = pd->toVGImage();
if (srcImage == VG_INVALID_HANDLE)
return;
QSize size = pd->size();
VGImage dstImage = QVGImagePool::instance()->createTemporaryImage
(VG_A_8, size.width(), size.height(),
VG_IMAGE_QUALITY_FASTER, pd);
if (dstImage == VG_INVALID_HANDLE)
return;
// Clamp the radius range. We divide by 2 because the OpenVG blur
// is "too blurry" compared to the default raster implementation.
VGfloat maxRadius = VGfloat(vgGeti(VG_MAX_GAUSSIAN_STD_DEVIATION));
VGfloat radiusF = VGfloat(blurRadius()) / 2.0f;
if (radiusF < 0.001f)
radiusF = 0.001f;
else if (radiusF > maxRadius)
radiusF = maxRadius;
// Blur the blackened source image.
vgGaussianBlur(dstImage, srcImage, radiusF, radiusF, VG_TILE_PAD);
VGImage child = VG_INVALID_HANDLE;
QRect srect;
if (srcRect.isNull() ||
(srcRect.topLeft().isNull() && srcRect.size() == size)) {
child = dstImage;
srect = QRect(0, 0, size.width(), size.height());
} else {
srect = srcRect.toRect();
child = vgChildImage(dstImage, srect.x(), srect.y(), srect.width(), srect.height());
}
qt_vg_drawVGImageStencil(painter, dest + offset(), child, color());
if(child != dstImage)
vgDestroyImage(child);
QVGImagePool::instance()->releaseImage(0, dstImage);
// Now draw the actual pixmap over the top.
painter->drawPixmap(dest, src, srect);
}
void QVGPixmapBlurFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
{
if (src.isNull())
return;
if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
// The pixmap data is not an instance of QVGPixmapData, so fall
// back to the default blur filter implementation.
QPixmapBlurFilter::draw(painter, dest, src, srcRect);
return;
}
QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
VGImage srcImage = pd->toVGImage();
if (srcImage == VG_INVALID_HANDLE)
return;
QSize size = pd->size();
VGImage dstImage = QVGImagePool::instance()->createTemporaryImage
(VG_sARGB_8888_PRE, size.width(), size.height(),
VG_IMAGE_QUALITY_FASTER, pd);
if (dstImage == VG_INVALID_HANDLE)
return;
// Clamp the radius range. We divide by 2 because the OpenVG blur
// is "too blurry" compared to the default raster implementation.
VGfloat maxRadius = VGfloat(vgGeti(VG_MAX_GAUSSIAN_STD_DEVIATION));
VGfloat radiusF = VGfloat(radius()) / 2.0f;
if (radiusF < 0.001f)
radiusF = 0.001f;
else if (radiusF > maxRadius)
radiusF = maxRadius;
vgGaussianBlur(dstImage, srcImage, radiusF, radiusF, VG_TILE_PAD);
VGImage child = VG_INVALID_HANDLE;
if (srcRect.isNull() ||
(srcRect.topLeft().isNull() && srcRect.size() == size)) {
child = dstImage;
} else {
QRect src = srcRect.toRect();
child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
}
qt_vg_drawVGImage(painter, dest, child);
if(child != dstImage)
vgDestroyImage(child);
QVGImagePool::instance()->releaseImage(0, dstImage);
}
/*******************************************************************************
* Function Name : InitView
* Returns : true if no error occured
* Description : Code in InitView() will be called by the Shell upon a change
* in the rendering context.
* Used to initialise variables that are dependent on the rendering
* context (e.g. textures, vertex buffers, etc.)
*******************************************************************************/
bool CChildImage::InitView()
{
//Create an image
m_vgImage = vgCreateImage(VG_sRGBA_8888, IMG_SIZE, IMG_SIZE, VG_IMAGE_QUALITY_NONANTIALIASED);
/*
Populate the image from memory. A 32bit integer array (8bits per component)
is created and populated.
*/
VGuint* pui32ImgData = new VGuint[IMG_SIZE*IMG_SIZE];
for(int i = 0; i < IMG_SIZE; ++i)
{
for(int j = 0; j < IMG_SIZE; ++j)
{
// Fills the data with a fancy pattern
if ( ((i*j)/8) % 2 )
pui32ImgData[j*IMG_SIZE+i] = PVRTRGBA(255,255,0,255);
else
pui32ImgData[j*IMG_SIZE+i] = PVRTRGBA(255, 255 - (j * 2), 255 - i, 255 - (i * 2));
}
}
/*
The data in the array is then copied to the portion of the image starting at (0,0) through to (IMG_SIZE, IMG_SIZE), in
this case that is the whole image. The coordinate system of the image places (0,0) at the bottom left-hand corner and
(IMG_SIZE, IMG_SIZE) at the top right-hand corner.
*/
vgImageSubData(m_vgImage, pui32ImgData, sizeof(VGuint) * IMG_SIZE, VG_sRGBA_8888, 0, 0, IMG_SIZE, IMG_SIZE);
// Delete the image data as it is now in OpenVG memory
delete[] pui32ImgData;
pui32ImgData = 0;
//Create child images
/*
The first child is a child of m_vgImage and is made up of the region of m_vgImage from (0,0) to (IMG_SIZE / 2, IMG_SIZE / 2).
Note: The area specified must be in the bounds of the parent.
*/
m_avgChildImages[0] = vgChildImage(m_vgImage, 0, 0, (VGint) (IMG_SIZE * 0.5), (VGint) (IMG_SIZE * 0.5));
//The second child is a clone of the first child.
//Get the dimensions of the first child..
int i32ChildWidth = vgGetParameteri(m_avgChildImages[0], VG_IMAGE_WIDTH);
int i32ChildHeight= vgGetParameteri(m_avgChildImages[0], VG_IMAGE_HEIGHT);
//..and use them to define the region for creating the second child.
m_avgChildImages[1] = vgChildImage(m_avgChildImages[0], 0, 0, i32ChildWidth, i32ChildHeight);
/*
Clear a small portion of the bottom left-hand corner of m_avgChildImages[0] to red.
This change will be seen in all relatives of m_avgChildImages[0], reason being they
all share the same physical memory.
Note:
When clearing you specify the coordinate you want to start from and then how many pixels
across and up you want to clear.
*/
VGfloat afClearColour[] = {1.0f, 0.0f, 0.0f, 1.0f};
vgSetfv(VG_CLEAR_COLOR, 4, afClearColour);
vgClearImage(m_avgChildImages[0], 0, 0, 10, 10);
//Set the clear colour for clearing the sceen
afClearColour[0] = 0.6f;
afClearColour[1] = 0.8f;
afClearColour[2] = 1.0f;
afClearColour[3] = 1.0f;
vgSetfv(VG_CLEAR_COLOR, 4, afClearColour);
m_PrintVG.Initialize(PVRShellGet(prefWidth), PVRShellGet(prefHeight));
return true;
}
void QVGPixmapConvolutionFilter::draw
(QPainter *painter, const QPointF &dest,
const QPixmap &src, const QRectF &srcRect) const
{
if (src.isNull())
return;
if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
// The pixmap data is not an instance of QVGPixmapData, so fall
// back to the default convolution filter implementation.
QPixmapConvolutionFilter::draw(painter, dest, src, srcRect);
return;
}
QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
VGImage srcImage = pd->toVGImage();
if (srcImage == VG_INVALID_HANDLE)
return;
QSize size = pd->size();
VGImage dstImage = QVGImagePool::instance()->createTemporaryImage
(VG_sARGB_8888_PRE, size.width(), size.height(),
VG_IMAGE_QUALITY_FASTER, pd);
if (dstImage == VG_INVALID_HANDLE)
return;
int kernelWidth = rows();
int kernelHeight = columns();
const qreal *kern = convolutionKernel();
QVarLengthArray<VGshort> kernel;
for (int i = 0; i < kernelWidth; ++i) {
for (int j = 0; j < kernelHeight; ++j) {
kernel.append((VGshort)(kern[j * kernelWidth + i] * 1024.0f));
}
}
VGfloat values[4];
values[0] = 0.0f;
values[1] = 0.0f;
values[2] = 0.0f;
values[3] = 0.0f;
vgSetfv(VG_TILE_FILL_COLOR, 4, values);
vgConvolve(dstImage, srcImage,
kernelWidth, kernelHeight, 0, 0,
kernel.constData(), 1.0f / 1024.0f, 0.0f,
VG_TILE_FILL);
VGImage child = VG_INVALID_HANDLE;
if (srcRect.isNull() ||
(srcRect.topLeft().isNull() && srcRect.size() == size)) {
child = dstImage;
} else {
QRect src = srcRect.toRect();
child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
}
qt_vg_drawVGImage(painter, dest, child);
if(child != dstImage)
vgDestroyImage(child);
QVGImagePool::instance()->releaseImage(0, dstImage);
}
void QVGPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
{
if (src.isNull())
return;
if (src.pixmapData()->classId() != QPixmapData::OpenVGClass) {
// The pixmap data is not an instance of QVGPixmapData, so fall
// back to the default colorize filter implementation.
QPixmapColorizeFilter::draw(painter, dest, src, srcRect);
return;
}
QVGPixmapData *pd = static_cast<QVGPixmapData *>(src.pixmapData());
VGImage srcImage = pd->toVGImage();
if (srcImage == VG_INVALID_HANDLE)
return;
QSize size = pd->size();
VGImage dstImage = QVGImagePool::instance()->createTemporaryImage
(VG_sARGB_8888_PRE, size.width(), size.height(),
VG_IMAGE_QUALITY_FASTER, pd);
if (dstImage == VG_INVALID_HANDLE)
return;
// Determine the weights for the matrix from the color and strength.
QColor c = color();
VGfloat strength = this->strength();
VGfloat weights[3];
VGfloat invweights[3];
VGfloat alpha = c.alphaF();
weights[0] = c.redF() * alpha;
weights[1] = c.greenF() * alpha;
weights[2] = c.blueF() * alpha;
invweights[0] = (1.0f - weights[0]) * strength;
invweights[1] = (1.0f - weights[1]) * strength;
invweights[2] = (1.0f - weights[2]) * strength;
// Grayscale weights.
static const VGfloat redGray = 11.0f / 32.0f;
static const VGfloat greenGray = 16.0f / 32.0f;
static const VGfloat blueGray = 1.0f - (redGray + greenGray);
VGfloat matrix[5][4];
matrix[0][0] = redGray * invweights[0] + (1.0f - strength);
matrix[0][1] = redGray * invweights[1];
matrix[0][2] = redGray * invweights[2];
matrix[0][3] = 0.0f;
matrix[1][0] = greenGray * invweights[0];
matrix[1][1] = greenGray * invweights[1] + (1.0f - strength);
matrix[1][2] = greenGray * invweights[2];
matrix[1][3] = 0.0f;
matrix[2][0] = blueGray * invweights[0];
matrix[2][1] = blueGray * invweights[1];
matrix[2][2] = blueGray * invweights[2] + (1.0f - strength);
matrix[2][3] = 0.0f;
matrix[3][0] = 0.0f;
matrix[3][1] = 0.0f;
matrix[3][2] = 0.0f;
matrix[3][3] = 1.0f;
matrix[4][0] = weights[0] * strength;
matrix[4][1] = weights[1] * strength;
matrix[4][2] = weights[2] * strength;
matrix[4][3] = 0.0f;
vgColorMatrix(dstImage, srcImage, matrix[0]);
VGImage child = VG_INVALID_HANDLE;
if (srcRect.isNull() ||
(srcRect.topLeft().isNull() && srcRect.size() == size)) {
child = dstImage;
} else {
QRect src = srcRect.toRect();
child = vgChildImage(dstImage, src.x(), src.y(), src.width(), src.height());
}
qt_vg_drawVGImage(painter, dest, child);
if(child != dstImage)
vgDestroyImage(child);
QVGImagePool::instance()->releaseImage(0, dstImage);
}
