本文整理汇总了C++中QFixed::toReal方法的典型用法代码示例。如果您正苦于以下问题：C++ QFixed::toReal方法的具体用法？C++ QFixed::toReal怎么用？C++ QFixed::toReal使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QFixed的用法示例。
在下文中一共展示了QFixed::toReal方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: alphaMapBoundingBox
glyph_metrics_t QFontEngineDirectWrite::alphaMapBoundingBox(glyph_t glyph, QFixed subPixelPosition,
const QTransform &matrix,
GlyphFormat /*format*/)
{
glyph_metrics_t bbox = QFontEngine::boundingBox(glyph, matrix); // To get transformed advance
UINT16 glyphIndex = glyph;
FLOAT glyphAdvance = 0;
DWRITE_GLYPH_OFFSET glyphOffset;
glyphOffset.advanceOffset = 0;
glyphOffset.ascenderOffset = 0;
DWRITE_GLYPH_RUN glyphRun;
glyphRun.fontFace = m_directWriteFontFace;
glyphRun.fontEmSize = fontDef.pixelSize;
glyphRun.glyphCount = 1;
glyphRun.glyphIndices = &glyphIndex;
glyphRun.glyphAdvances = &glyphAdvance;
glyphRun.isSideways = false;
glyphRun.bidiLevel = 0;
glyphRun.glyphOffsets = &glyphOffset;
DWRITE_MATRIX transform;
transform.dx = subPixelPosition.toReal();
transform.dy = 0;
transform.m11 = matrix.m11();
transform.m12 = matrix.m12();
transform.m21 = matrix.m21();
transform.m22 = matrix.m22();
IDWriteGlyphRunAnalysis *glyphAnalysis = NULL;
HRESULT hr = m_directWriteFactory->CreateGlyphRunAnalysis(
&glyphRun,
1.0f,
&transform,
DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC,
DWRITE_MEASURING_MODE_NATURAL,
0.0, 0.0,
&glyphAnalysis
);
if (SUCCEEDED(hr)) {
RECT rect;
glyphAnalysis->GetAlphaTextureBounds(DWRITE_TEXTURE_CLEARTYPE_3x1, &rect);
glyphAnalysis->Release();
return glyph_metrics_t(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
bbox.xoff, bbox.yoff);
} else {
return glyph_metrics_t();
}
}示例2: imageForGlyph
QImage QFontEngineDirectWrite::imageForGlyph(glyph_t t,
QFixed subPixelPosition,
int margin,
const QTransform &xform)
{
UINT16 glyphIndex = t;
FLOAT glyphAdvance = 0;
DWRITE_GLYPH_OFFSET glyphOffset;
glyphOffset.advanceOffset = 0;
glyphOffset.ascenderOffset = 0;
DWRITE_GLYPH_RUN glyphRun;
glyphRun.fontFace = m_directWriteFontFace;
glyphRun.fontEmSize = fontDef.pixelSize;
glyphRun.glyphCount = 1;
glyphRun.glyphIndices = &glyphIndex;
glyphRun.glyphAdvances = &glyphAdvance;
glyphRun.isSideways = false;
glyphRun.bidiLevel = 0;
glyphRun.glyphOffsets = &glyphOffset;
DWRITE_MATRIX transform;
transform.dx = subPixelPosition.toReal();
transform.dy = 0;
transform.m11 = xform.m11();
transform.m12 = xform.m12();
transform.m21 = xform.m21();
transform.m22 = xform.m22();
IDWriteGlyphRunAnalysis *glyphAnalysis = NULL;
HRESULT hr = m_directWriteFactory->CreateGlyphRunAnalysis(
&glyphRun,
1.0f,
&transform,
DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC,
DWRITE_MEASURING_MODE_NATURAL,
0.0, 0.0,
&glyphAnalysis
);
if (SUCCEEDED(hr)) {
RECT rect;
glyphAnalysis->GetAlphaTextureBounds(DWRITE_TEXTURE_CLEARTYPE_3x1, &rect);
rect.left -= margin;
rect.top -= margin;
rect.right += margin;
rect.bottom += margin;
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
int size = width * height * 3;
if (size > 0) {
BYTE *alphaValues = new BYTE[size];
qMemSet(alphaValues, size, 0);
hr = glyphAnalysis->CreateAlphaTexture(DWRITE_TEXTURE_CLEARTYPE_3x1,
&rect,
alphaValues,
size);
if (SUCCEEDED(hr)) {
QImage img(width, height, QImage::Format_RGB32);
img.fill(0xffffffff);
for (int y=0; y<height; ++y) {
uint *dest = reinterpret_cast<uint *>(img.scanLine(y));
BYTE *src = alphaValues + width * 3 * y;
for (int x=0; x<width; ++x) {
dest[x] = *(src) << 16
| *(src + 1) << 8
| *(src + 2);
src += 3;
}
}
delete[] alphaValues;
glyphAnalysis->Release();
return img;
} else {
delete[] alphaValues;
glyphAnalysis->Release();
qErrnoWarning("QFontEngineDirectWrite::imageForGlyph: CreateAlphaTexture failed");
}
}
} else {
qErrnoWarning("QFontEngineDirectWrite::imageForGlyph: CreateGlyphRunAnalysis failed");
}
return QImage();
}示例3: imageForGlyph
QImage QWindowsFontEngineDirectWrite::imageForGlyph(glyph_t t,
QFixed subPixelPosition,
int margin,
const QTransform &xform)
{
glyph_metrics_t metrics = QFontEngine::boundingBox(t, xform);
int width = (metrics.width + margin * 2 + 4).ceil().toInt() ;
int height = (metrics.height + margin * 2 + 4).ceil().toInt();
UINT16 glyphIndex = t;
FLOAT glyphAdvance = metrics.xoff.toReal();
DWRITE_GLYPH_OFFSET glyphOffset;
glyphOffset.advanceOffset = 0;
glyphOffset.ascenderOffset = 0;
DWRITE_GLYPH_RUN glyphRun;
glyphRun.fontFace = m_directWriteFontFace;
glyphRun.fontEmSize = fontDef.pixelSize;
glyphRun.glyphCount = 1;
glyphRun.glyphIndices = &glyphIndex;
glyphRun.glyphAdvances = &glyphAdvance;
glyphRun.isSideways = false;
glyphRun.bidiLevel = 0;
glyphRun.glyphOffsets = &glyphOffset;
QFixed x = margin - metrics.x.floor() + subPixelPosition;
QFixed y = margin - metrics.y.floor();
DWRITE_MATRIX transform;
transform.dx = x.toReal();
transform.dy = y.toReal();
transform.m11 = xform.m11();
transform.m12 = xform.m12();
transform.m21 = xform.m21();
transform.m22 = xform.m22();
IDWriteGlyphRunAnalysis *glyphAnalysis = NULL;
HRESULT hr = m_fontEngineData->directWriteFactory->CreateGlyphRunAnalysis(
&glyphRun,
1.0f,
&transform,
DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC,
DWRITE_MEASURING_MODE_NATURAL,
0.0, 0.0,
&glyphAnalysis
);
if (SUCCEEDED(hr)) {
RECT rect;
rect.left = 0;
rect.top = 0;
rect.right = width;
rect.bottom = height;
int size = width * height * 3;
BYTE *alphaValues = new BYTE[size];
memset(alphaValues, size, 0);
hr = glyphAnalysis->CreateAlphaTexture(DWRITE_TEXTURE_CLEARTYPE_3x1,
&rect,
alphaValues,
size);
if (SUCCEEDED(hr)) {
QImage img(width, height, QImage::Format_RGB32);
img.fill(0xffffffff);
for (int y=0; y<height; ++y) {
uint *dest = reinterpret_cast<uint *>(img.scanLine(y));
BYTE *src = alphaValues + width * 3 * y;
for (int x=0; x<width; ++x) {
dest[x] = *(src) << 16
| *(src + 1) << 8
| *(src + 2);
src += 3;
}
}
delete[] alphaValues;
glyphAnalysis->Release();
return img;
} else {
delete[] alphaValues;
glyphAnalysis->Release();
qErrnoWarning("%s: CreateAlphaTexture failed", __FUNCTION__);
}
} else {
qErrnoWarning("%s: CreateGlyphRunAnalysis failed", __FUNCTION__);
}
return QImage();
}