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);
}
void CHuiFxVg10BlurFilter::DrawEffect(CHuiFxEngine& aEngine, VGImage aTargetImage, VGImage aSourceImage, TInt aWidth, TInt aHeight, TBool /*aHasSurface*/)
{
const VGfloat blur_x = clamp(iBlurX, EPSILON, 128.0f);
const VGfloat blur_y = clamp(iBlurY, EPSILON, 128.0f);
const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f);
if(opacity < 1.0f - EPSILON) // slow path --- take opacity into account
{
// const VGint width = vgGetParameteri(aSourceImage, VG_IMAGE_WIDTH);
// const VGint height = vgGetParameteri(aSourceImage, VG_IMAGE_HEIGHT);
const VGint width = aWidth;
const VGint height = aHeight;
CHuiFxRenderbuffer* auxBuffer = aEngine.AcquireRenderbuffer(TSize(width, height));
if (!auxBuffer)
{
return; // not enough memory --- filter not completed successfully
}
auxBuffer->BindAsTexture(ERenderbufferUsageReadWrite);
VGImage auxImage = reinterpret_cast<CHuiFxVg10RenderbufferBase*>(auxBuffer)->Image();
vgGaussianBlur(auxImage, aSourceImage, blur_x, blur_y, VG_TILE_PAD);
if(OpacityChanged())
{
UpdateAlphaLUT();
}
vgLookup(aTargetImage, auxImage, iColorLUT, iColorLUT, iColorLUT, iAlphaLUT, VG_TRUE, VG_FALSE);
auxBuffer->UnbindAsTexture();
aEngine.ReleaseRenderbuffer(auxBuffer);
}
else // fast path --- the blur, just blur and nothing but the blur.
{
vgGaussianBlur(aTargetImage, aSourceImage, blur_x, blur_y, VG_TILE_PAD);
}
}
void SubtitleRenderer::load_glyph(char32_t codepoint) {
VGfloat escapement[2]{};
auto load_glyph_internal =
[&](FT_Face ft_face, VGFont vg_font, bool border) {
try {
auto glyph_index = FT_Get_Char_Index(ft_face, codepoint);
ENFORCE(!FT_Load_Glyph(ft_face, glyph_index, FT_LOAD_NO_HINTING));
FT_Glyph glyph;
ENFORCE(!FT_Get_Glyph(ft_face->glyph, &glyph));
SCOPE_EXIT {FT_Done_Glyph(glyph);};
if (border)
ENFORCE(!FT_Glyph_StrokeBorder(&glyph, ft_stroker_, 0, 1));
ENFORCE(!FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, NULL, 1));
FT_BitmapGlyph bit_glyph = (FT_BitmapGlyph) glyph;
FT_Bitmap& bitmap = bit_glyph->bitmap;
VGImage image{};
VGfloat glyph_origin[2]{};
if (bitmap.width > 0 && bitmap.rows > 0) {
constexpr VGfloat blur_stddev = 0.6;
const int padding = static_cast<int>(3*blur_stddev + 0.5);
const int image_width = bitmap.width + padding*2;
const int image_height = bitmap.rows + padding*2;
image = vgCreateImage(VG_A_8, image_width, image_height,
VG_IMAGE_QUALITY_NONANTIALIASED);
assert(image);
if (bitmap.pitch > 0) {
vgImageSubData(image,
bitmap.buffer + bitmap.pitch*(bitmap.rows-1),
-bitmap.pitch,
VG_A_8,
padding,
padding,
bitmap.width,
bitmap.rows);
assert(!vgGetError());
} else {
vgImageSubData(image,
bitmap.buffer,
bitmap.pitch,
VG_A_8,
padding,
padding,
bitmap.width,
bitmap.rows);
assert(!vgGetError());
}
auto softened_image = vgCreateImage(VG_A_8,
image_width,
image_height,
VG_IMAGE_QUALITY_NONANTIALIASED);
assert(image);
// Even out hard and soft edges
vgGaussianBlur(softened_image, image, blur_stddev, blur_stddev, VG_TILE_FILL);
assert(!vgGetError());
vgDestroyImage(image);
assert(!vgGetError());
image = softened_image;
glyph_origin[0] = static_cast<VGfloat>(padding - bit_glyph->left);
glyph_origin[1] = static_cast<VGfloat>(padding + bitmap.rows - bit_glyph->top - 1);
}
escapement[0] = static_cast<VGfloat>((ft_face->glyph->advance.x + 32) / 64);
escapement[1] = 0;
vgSetGlyphToImage(vg_font, codepoint, image, glyph_origin, escapement);
assert(!vgGetError());
if (image) {
vgDestroyImage(image);
assert(!vgGetError());
}
} catch(...) {
escapement[0] = 0;
escapement[1] = 0;
vgSetGlyphToImage(vg_font, codepoint, VG_INVALID_HANDLE, escapement, escapement);
assert(!vgGetError());
}
};
load_glyph_internal(ft_face_, vg_font_, false);
glyphs_[codepoint].advance = escapement[0];
load_glyph_internal(ft_face_, vg_font_border_, true);
}
int createFont(FT_Face fontFace, FT_UInt size)
{
initFreeTypeLibrary();
VGfloat glyphOrigin[2];
VGfloat escapement[2];
FT_Stroker fontStroker;
int error = FT_Stroker_New(freeTypeLibrary, &fontStroker);
if (error) {
logInfo(LOG_FREETYPE, "Error FT_Stroker_New.(error=%d)\n", error);
return -1;
}
FT_Stroker_Set(fontStroker,
2*64.0f, // Need to get the right value based on size.
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0);
VGFont tmpFont;
struct fontListItem *tmpFontListItem = fontExists(fontFace, size);
if (tmpFontListItem == NULL) {
tmpFont = vgCreateFont(fontFace->num_glyphs);
if (tmpFont == VG_INVALID_HANDLE) {
logInfo(LOG_FREETYPE, "Error could not create vgCreateFont.\n");
return -1;
}
tmpFontListItem = malloc(sizeof(struct fontListItem));
tmpFontListItem->fontFace = fontFace;
tmpFontListItem->size = size;
tmpFontListItem->font = tmpFont;
addToFontList(tmpFontListItem);
}
else {
return 0;
}
error = FT_Set_Char_Size( fontFace, /* handle to face object */
0, /* char_width in 1/64th of points */
size*64, /* char_height in 1/64th of points */
72, /* horizontal device resolution */
72 ); /* vertical device resolution */
if (error) {
logInfo(LOG_FREETYPE, "Error FT_Set_Char_Size.(error=%d)\n", error);
return -1;
}
int index;
int counter = 0;
FT_UInt charIndex;
VGImage image = VG_INVALID_HANDLE;
VGImage softenedImage;
VGfloat blustStdDev;
int padding;
int image_width;
int image_height;
VGErrorCode vg_error;
FT_Glyph glyph;
logInfo(LOG_FREETYPE, "This font contains %ld glyphs.\n", fontFace->num_glyphs);
for (index = 32; (index < 256) && (counter < fontFace->num_glyphs); index++) {
counter++;
charIndex = FT_Get_Char_Index(fontFace, index);
logInfo(LOG_FREETYPE, "index=0x%x, charIndex=0x%x\n", index, charIndex);
escapement[0] = 0;
escapement[1] = 0;
if (charIndex == 0) {
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "charindex== 0\n");
continue;
}
error = FT_Load_Glyph(fontFace, charIndex, FT_LOAD_NO_HINTING);
if (error) {
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "Error FT_Load_Glyph (error:%d)\n", error);
continue;
}
error = FT_Get_Glyph(fontFace->glyph, &glyph);
if (error) {
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "Error FT_Get_Glyph (error:%d)\n", error);
continue;
}
/*
error = FT_Glyph_StrokeBorder(&glyph, fontStroker, 0, 1);
if (error) {
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "Error FT_Glyph_StrokeBorder (error:%d)\n", error);
continue;
}
*/
error = FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, NULL, 1);
if (error) {
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "Error FT_Glyph_To_Bitmap (error:%d)\n", error);
continue;
}
FT_BitmapGlyph bitGlyph = (FT_BitmapGlyph)glyph;
FT_Bitmap bitmap = bitGlyph->bitmap;
if (bitmap.width > 0 && bitmap.rows > 0) {
blustStdDev = 0.6;
padding = (3*blustStdDev + 0.5);
image_width = bitmap.width + padding*2;
image_height = bitmap.rows + padding*2;
image = vgCreateImage(VG_A_8, image_width, image_height, VG_IMAGE_QUALITY_NONANTIALIASED);
if (image == VG_INVALID_HANDLE) {
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "vgCreateImage (error:%d)\n", vgGetError());
continue;
}
if (bitmap.pitch > 0) {
vgImageSubData(image,
bitmap.buffer + bitmap.pitch*(bitmap.rows-1),
-bitmap.pitch,
VG_A_8,
padding,
padding,
bitmap.width,
bitmap.rows);
} else {
vgImageSubData(image,
bitmap.buffer,
bitmap.pitch,
VG_A_8,
padding,
padding,
bitmap.width,
bitmap.rows);
}
vg_error = vgGetError();
if (vg_error) {
vgDestroyImage(image);
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
showVGErrorStr(vg_error, "vgImageSubData");
continue;
}
softenedImage = vgCreateImage(VG_A_8,
image_width,
image_height,
VG_IMAGE_QUALITY_NONANTIALIASED);
if (softenedImage == VG_INVALID_HANDLE) {
vgDestroyImage(image);
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
logInfo(LOG_FREETYPE, "vgCreateImage (error:%d)\n", vgGetError());
continue;
}
// Even out hard and soft edges
vgGaussianBlur(softenedImage, image, blustStdDev, blustStdDev, VG_TILE_FILL);
vg_error = vgGetError();
if (vg_error) {
vgDestroyImage(softenedImage);
vgDestroyImage(image);
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
showVGErrorStr(vg_error, "vgGaussianBlur");
continue;
}
vgDestroyImage(image);
image = softenedImage;
glyphOrigin[0] = (VGfloat)(padding - bitGlyph->left);
glyphOrigin[1] = (VGfloat)(padding + bitmap.rows - bitGlyph->top - 1);
}
else {
logInfo(LOG_FREETYPE, "Error bitmap.width = %d, bitmap.rows = %d\n", bitmap.width, bitmap.rows);
}
escapement[0] = (VGfloat)((fontFace->glyph->advance.x + 32) / 64);
escapement[1] = 0;
vgSetGlyphToImage(tmpFont, index, image, glyphOrigin, escapement);
vg_error = vgGetError();
if (vg_error) {
vgDestroyImage(softenedImage);
vgDestroyImage(image);
FT_Done_Glyph(glyph);
vgSetGlyphToImage(tmpFont, index, VG_INVALID_HANDLE, escapement, escapement);
showVGErrorStr(vg_error, "vgSetGlyphToImage");
continue;
}
logInfo(LOG_FREETYPE, "Create glyph %d.\n", index);
FT_Done_Glyph(glyph);
if (image != VG_INVALID_HANDLE) {
vgDestroyImage(image);
}
}
return 0;
}
