bool CanvasD2D::MeasureTextLinesW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect, UINT& lines)
{
((TextFormatD2D&)format).m_TextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_WRAP);
IDWriteTextLayout* textLayout;
HRESULT hr = c_DWFactory->CreateTextLayout(
str,
strLen,
((TextFormatD2D&)format).m_TextFormat,
rect.Width,
10000,
&textLayout);
if (SUCCEEDED(hr))
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
rect.Width = metrics.width + 5.0f;
rect.Height = metrics.height + 1.0f; // 1.0f to get same result as GDI+.
lines = metrics.lineCount;
textLayout->Release();
return true;
}
return false;
}
// Measure text
FW1_RECTF STDMETHODCALLTYPE CFW1FontWrapper::MeasureString(
const WCHAR *pszString,
const WCHAR *pszFontFamily,
FLOAT FontSize,
const FW1_RECTF *pLayoutRect,
UINT Flags
) {
FW1_RECTF stringRect = {pLayoutRect->Left, pLayoutRect->Top, pLayoutRect->Left, pLayoutRect->Top};
IDWriteTextLayout *pTextLayout = createTextLayout(pszString, pszFontFamily, FontSize, pLayoutRect, Flags);
if(pTextLayout != NULL) {
// Get measurements
/*DWRITE_OVERHANG_METRICS overhangMetrics;
HRESULT hResult = pTextLayout->GetOverhangMetrics(&overhangMetrics);
if(SUCCEEDED(hResult)) {
stringRect.Left = floor(pLayoutRect->Left - overhangMetrics.left);
stringRect.Top = floor(pLayoutRect->Top - overhangMetrics.top);
stringRect.Right = ceil(pLayoutRect->Left + overhangMetrics.right);
stringRect.Bottom = ceil(pLayoutRect->Top + overhangMetrics.bottom);
}*/
DWRITE_TEXT_METRICS textMetrics;
HRESULT hResult = pTextLayout->GetMetrics(&textMetrics);
if(SUCCEEDED(hResult)) {
stringRect.Left = textMetrics.left;
stringRect.Top = textMetrics.top;
stringRect.Right = textMetrics.left + textMetrics.widthIncludingTrailingWhitespace;
stringRect.Bottom = textMetrics.top + textMetrics.height;
}
pTextLayout->Release();
}
return stringRect;
}
bool CDirectWriteRenderer::GetTextMetrics(
LPCWSTR pText, int Length, CDirectWriteFont &Font, TextMetrics *pMetrics)
{
if (pText == nullptr || pMetrics == nullptr)
return false;
if (m_pRenderTarget == nullptr)
return false;
HRESULT hr = E_UNEXPECTED;
IDWriteFactory *pFactory = m_System.GetDWriteFactory();
if (pFactory != nullptr) {
IDWriteTextFormat *pTextFormat = Font.GetTextFormat();
if (pTextFormat != nullptr) {
D2D1_SIZE_F Size;
IDWriteTextLayout *pTextLayout;
pTextFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING);
pTextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
if (Length < 0)
Length = ::lstrlenW(pText);
Size = m_pRenderTarget->GetSize();
hr = pFactory->CreateTextLayout(
pText,
Length,
pTextFormat,
Size.width,
Size.height,
&pTextLayout);
if (SUCCEEDED(hr)) {
DWRITE_TEXT_METRICS Metrics;
hr = pTextLayout->GetMetrics(&Metrics);
if (SUCCEEDED(hr)) {
pMetrics->Width = Metrics.width;
pMetrics->WidthIncludingTrailingWhitespace = Metrics.widthIncludingTrailingWhitespace;
pMetrics->Height = Metrics.height;
}
pTextLayout->Release();
}
pTextFormat->Release();
}
pFactory->Release();
}
return SUCCEEDED(hr);
}
bool CanvasD2D::MeasureTextW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect)
{
IDWriteTextLayout* textLayout;
HRESULT hr = c_DWFactory->CreateTextLayout(
str,
strLen,
((TextFormatD2D&)format).m_TextFormat,
10000,
10000,
&textLayout);
if (SUCCEEDED(hr))
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
rect.Width = metrics.width + 5.0f;
rect.Height = metrics.height + 1.0f; // 1.0f to get same result as GDI+.
textLayout->Release();
return true;
}
return false;
}
HRESULT Layout::Draw(float pageWidthInDips, ID2D1RenderTarget* renderTarget, ID2D1Brush* textBrush)
{
HRESULT hr = S_OK;
static UINT const fontResourceIDs[] = { IDR_FONT_PERICLES, IDR_FONT_KOOTENAY };
// Create a custom font collection comprising our two font resources. We could have done this
// in the constructor rather than every time. However, if you set break points on the loader
// callbacks you'll find they're only called the first time the font collection is created.
// Thereafter the font collection data is cached so recreating it is quite fast.
hr = fontContext_.Initialize();
if (FAILED(hr))
return hr;
IDWriteFontCollection* fontCollection = NULL;
hr = fontContext_.CreateFontCollection(
fontResourceIDs,
sizeof(fontResourceIDs),
&fontCollection
);
if (FAILED(hr))
return hr;
// Set up for first paragraph.
float const columnWidth = std::max<float>(minColumnWidth_, pageWidthInDips - leftMargin_ - rightMargin_);
float y = 0;
float spaceBefore = 0;
IDWriteTextFormat* textFormat = NULL;
size_t const formatCount = sizeof(formats_) / sizeof(formats_[0]);
size_t const paragraphCount = sizeof(paragraphs_) / sizeof(paragraphs_[0]);
// Iterate over all the paragraphs.
for (size_t i = 0; i < paragraphCount; ++i)
{
// We create a different text format object for the first formatCount
// paragraphs. After that we reuse the last text format object.
if (i < formatCount)
{
// Create the text format object, specifying both the family name and the
// custom font collection in which to look for the family name. DirectWrite
// will only look for the family name in the specified collection so there
// is no ambiguity even if the system font collection happens to have a font
// with the same family name.
SafeRelease(&textFormat);
hr = g_dwriteFactory->CreateTextFormat(
formats_[i].familyName,
fontCollection,
DWRITE_FONT_WEIGHT_NORMAL,
DWRITE_FONT_STYLE_NORMAL,
DWRITE_FONT_STRETCH_NORMAL,
formats_[i].pointSize * (96.0f / 72),
L"en-us",
&textFormat
);
spaceBefore = formats_[i].spaceBefore * (96.0f / 72);
}
IDWriteTextLayout* textLayout = NULL;
if (SUCCEEDED(hr))
{
// Load the string.
int const maxLength = 512;
wchar_t charBuffer[maxLength];
int stringLength = LoadString(g_instance, paragraphs_[i], charBuffer, maxLength);
// Create the text layout object.
hr = g_dwriteFactory->CreateTextLayout(
charBuffer,
stringLength,
textFormat,
columnWidth,
0,
&textLayout
);
}
if (SUCCEEDED(hr))
{
// Draw the text and update the y coordinate.
y += spaceBefore;
renderTarget->DrawTextLayout(
D2D1::Point2F(leftMargin_, y),
textLayout,
textBrush
);
DWRITE_TEXT_METRICS metrics;
hr = textLayout->GetMetrics(&metrics);
y += metrics.height;
}
SafeRelease(&textLayout);
if (FAILED(hr))
break;
}
SafeRelease(&textFormat);
SafeRelease(&fontCollection);
return hr;
}
int nf_print(void * bitmap, uint16_t w, uint16_t h,
nf_font_t font, nf_feature_t * features, size_t features_count,
nf_aabb_t * result_rect, const char * text, ...)
{
if(!bitmap)
{
NF_ERROR("can't print with invalid bitmap\n");
return -1;
}
if(!font)
{
NF_ERROR("can't print with invalid font\n");
return -1;
}
if(!text)
{
NF_ERROR("can't print with invalid text\n");
return -1;
}
// figure out text rendering settings
HRESULT hr = 0;
D2D1_COLOR_F bg_color = D2D1::ColorF(0.0f, 0.0f, 0.0f, 0.0f);
D2D1_COLOR_F fg_color = D2D1::ColorF(1.0f, 1.0f, 1.0f, 1.0f);
DWRITE_WORD_WRAPPING text_wrap = DWRITE_WORD_WRAPPING_WRAP;
DWRITE_TEXT_ALIGNMENT text_alignment = DWRITE_TEXT_ALIGNMENT_LEADING;
DWRITE_PARAGRAPH_ALIGNMENT parg_alignment = DWRITE_PARAGRAPH_ALIGNMENT_NEAR;
D2D1_TEXT_ANTIALIAS_MODE text_aa_mode = D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE;
float ppi_x = 0.0f, ppi_y = 0.0f;
ctx.d2d_factory->GetDesktopDpi(&ppi_x, &ppi_y);
size_t len = strlen(text) + 1;
WCHAR * wtext = (WCHAR*)alloca(len * sizeof(WCHAR));
size_t wlen = mbstowcs(wtext, text, len);
if(wlen == (size_t)-1)
{
NF_ERROR("failed to convert text to wchar, text : '%s'\n", text);
return -1;
}
IDWriteTextLayout * layout = NULL;
if(FAILED(hr = ctx.dw_factory->CreateTextLayout(
wtext, wlen,
(IDWriteTextFormat*)font,
w, h,
&layout)))
{
nf_explain_hr(hr, "can't create dwrite text layout");
return -1;
}
for(size_t i = 0; i < features_count; ++i)
{
DWRITE_TEXT_RANGE range;
range.startPosition = features[i].range.start;
range.length = features[i].range.end - features[i].range.start + 1;
switch(features[i].type)
{
case NF_FEATURE_BOLD:
layout->SetFontWeight(DWRITE_FONT_WEIGHT_BOLD, range);
break;
case NF_FEATURE_UNDERLINE:
layout->SetUnderline(true, range);
break;
case NF_FEATURE_ITALIC:
layout->SetFontStyle(DWRITE_FONT_STYLE_ITALIC, range);
break;
case NF_FEATURE_WRAP:
text_wrap = DWRITE_WORD_WRAPPING_WRAP;
break;
case NF_FEATURE_NO_WRAP:
text_wrap = DWRITE_WORD_WRAPPING_NO_WRAP;
break;
case NF_FEATURE_ALIGN_LEFT:
text_alignment = DWRITE_TEXT_ALIGNMENT_LEADING;
break;
case NF_FEATURE_ALIGN_CENTER:
text_alignment = DWRITE_TEXT_ALIGNMENT_CENTER;
break;
case NF_FEATURE_ALIGN_RIGHT:
text_alignment = DWRITE_TEXT_ALIGNMENT_TRAILING;
break;
case NF_FEATURE_ALIGN_JUSTIFIED:
text_alignment = DWRITE_TEXT_ALIGNMENT_JUSTIFIED;
break;
case NF_FEATURE_ALIGN_PARAGRAPH_LEFT:
parg_alignment = DWRITE_PARAGRAPH_ALIGNMENT_NEAR;
break;
case NF_FEATURE_ALIGN_PARAGRAPH_CENTER:
parg_alignment = DWRITE_PARAGRAPH_ALIGNMENT_CENTER;
break;
case NF_FEATURE_ALIGN_PARAGRAPH_RIGHT:
parg_alignment = DWRITE_PARAGRAPH_ALIGNMENT_FAR;
break;
case NF_FEATURE_AA_DISABLED:
text_aa_mode = D2D1_TEXT_ANTIALIAS_MODE_ALIASED;
break;
case NF_FEATURE_AA_WIN_CLEARTYPE:
text_aa_mode = D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE;
break;
case NF_FEATURE_AA_WIN_GREYSCALE:
text_aa_mode = D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE;
break;
case NF_FEATURE_PPI:
ppi_x = features[i].ppi.x;
ppi_y = features[i].ppi.y;
break;
case NF_FEATURE_COLOR_BG:
bg_color = D2D1::ColorF(
features[i].color.r,
features[i].color.g,
features[i].color.b,
features[i].color.a);
break;
case NF_FEATURE_COLOR_TEXT:
fg_color = D2D1::ColorF(
features[i].color.r,
features[i].color.g,
features[i].color.b,
features[i].color.a);
break;
default:
break;
}
}
layout->SetWordWrapping(text_wrap);
layout->SetTextAlignment(text_alignment);
layout->SetParagraphAlignment(parg_alignment);
ctx.d2d_rt->SetDpi(ppi_x, ppi_y);
ctx.d2d_rt->SetTextAntialiasMode(text_aa_mode);
ctx.d2d_brush->SetColor(fg_color);
// figure our result metrics
// TODO does this call actually rasterizes text?
DWRITE_TEXT_METRICS text_metrics;
layout->GetMetrics(&text_metrics);
float clip_x1 = text_metrics.left;
float clip_y1 = text_metrics.top;
float clip_x2 = text_metrics.left + text_metrics.width;
float clip_y2 = text_metrics.top + text_metrics.height;
clip_x1 = clip_x1 < 0 ? 0 : (clip_x1 >= w ? w - 1 : clip_x1);
clip_y1 = clip_y1 < 0 ? 0 : (clip_y1 >= h ? h - 1 : clip_y1);
clip_x2 = clip_x2 < 0 ? 0 : (clip_x2 >= w ? w - 1 : clip_x2);
clip_y2 = clip_y2 < 0 ? 0 : (clip_y2 >= h ? h - 1 : clip_y2);
float clip_w = clip_x2 - clip_x1 + 1.0f;
float clip_h = clip_y2 - clip_y1 + 1.0f;
nf_aabb_t aabb;
aabb.x = clip_x1;
aabb.y = clip_y1;
aabb.w = clip_w;
aabb.h = clip_h;
if(result_rect)
*result_rect = aabb;
// render text
ctx.d2d_rt->BeginDraw();
ctx.d2d_rt->Clear(bg_color);
ctx.d2d_rt->DrawTextLayout(D2D1::Point2F(), layout, ctx.d2d_brush);
ctx.d2d_rt->EndDraw();
layout->Release();
layout = NULL;
// read texture from d3d
ctx.d3d_device->CopyResource(ctx.d3d_texture2, ctx.d3d_texture1);
D3D10_MAPPED_TEXTURE2D mapped = {0};
if(FAILED(hr = ctx.d3d_texture2->Map(0, D3D10_MAP_READ, 0, &mapped)))
{
nf_explain_hr(hr, "can't map d3d texture");
return -1;
}
for(size_t j = aabb.y; j < aabb.y + aabb.h; ++j)
// hardcoded BGRA8 format
memcpy(
(uint8_t*)bitmap + (j * w + aabb.x) * 4,
(uint8_t*)mapped.pData + j * mapped.RowPitch + aabb.x,
aabb.w * 4);
ctx.d3d_texture2->Unmap(0);
return 0;
}