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authorWeblate <42@minetest.ru>2013-02-28 18:03:28 +0100
committerWeblate <42@minetest.ru>2013-02-28 18:03:28 +0100
commit22e186b4aa88b585e71500c4e9a03bf69b0b6191 (patch)
tree14c5b7a73cf144ba7cf3066caac088a200f81a72 /src/cguittfont/CGUITTFont.cpp
parent372acf7b8eca0614a4a0da93cfbaccbcd459b36b (diff)
parentd31f07bd4b83f858cce589faac56922e12ba670f (diff)
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Merge remote branch 'origin/master'
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-rw-r--r--src/cguittfont/CGUITTFont.cpp1146
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diff --git a/src/cguittfont/CGUITTFont.cpp b/src/cguittfont/CGUITTFont.cpp
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+/*
+ CGUITTFont FreeType class for Irrlicht
+ Copyright (c) 2009-2010 John Norman
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any
+ damages arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any
+ purpose, including commercial applications, and to alter it and
+ redistribute it freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you
+ must not claim that you wrote the original software. If you use
+ this software in a product, an acknowledgment in the product
+ documentation would be appreciated but is not required.
+
+ 2. Altered source versions must be plainly marked as such, and
+ must not be misrepresented as being the original software.
+
+ 3. This notice may not be removed or altered from any source
+ distribution.
+
+ The original version of this class can be located at:
+ http://irrlicht.suckerfreegames.com/
+
+ John Norman
+ john@suckerfreegames.com
+*/
+
+#include <irrlicht.h>
+#include "CGUITTFont.h"
+
+namespace irr
+{
+namespace gui
+{
+
+// Manages the FT_Face cache.
+struct SGUITTFace : public virtual irr::IReferenceCounted
+{
+ SGUITTFace() : face_buffer(0), face_buffer_size(0)
+ {
+ memset((void*)&face, 0, sizeof(FT_Face));
+ }
+
+ ~SGUITTFace()
+ {
+ FT_Done_Face(face);
+ delete[] face_buffer;
+ }
+
+ FT_Face face;
+ FT_Byte* face_buffer;
+ FT_Long face_buffer_size;
+};
+
+// Static variables.
+FT_Library CGUITTFont::c_library;
+core::map<io::path, SGUITTFace*> CGUITTFont::c_faces;
+bool CGUITTFont::c_libraryLoaded = false;
+scene::IMesh* CGUITTFont::shared_plane_ptr_ = 0;
+scene::SMesh CGUITTFont::shared_plane_;
+
+//
+
+video::IImage* SGUITTGlyph::createGlyphImage(const FT_Bitmap& bits, video::IVideoDriver* driver) const
+{
+ // Determine what our texture size should be.
+ // Add 1 because textures are inclusive-exclusive.
+ core::dimension2du d(bits.width + 1, bits.rows + 1);
+ core::dimension2du texture_size;
+ //core::dimension2du texture_size(bits.width + 1, bits.rows + 1);
+
+ // Create and load our image now.
+ video::IImage* image = 0;
+ switch (bits.pixel_mode)
+ {
+ case FT_PIXEL_MODE_MONO:
+ {
+ // Create a blank image and fill it with transparent pixels.
+ texture_size = d.getOptimalSize(true, true);
+ image = driver->createImage(video::ECF_A1R5G5B5, texture_size);
+ image->fill(video::SColor(0, 255, 255, 255));
+
+ // Load the monochrome data in.
+ const u32 image_pitch = image->getPitch() / sizeof(u16);
+ u16* image_data = (u16*)image->lock();
+ u8* glyph_data = bits.buffer;
+ for (s32 y = 0; y < bits.rows; ++y)
+ {
+ u16* row = image_data;
+ for (s32 x = 0; x < bits.width; ++x)
+ {
+ // Monochrome bitmaps store 8 pixels per byte. The left-most pixel is the bit 0x80.
+ // So, we go through the data each bit at a time.
+ if ((glyph_data[y * bits.pitch + (x / 8)] & (0x80 >> (x % 8))) != 0)
+ *row = 0xFFFF;
+ ++row;
+ }
+ image_data += image_pitch;
+ }
+ image->unlock();
+ break;
+ }
+
+ case FT_PIXEL_MODE_GRAY:
+ {
+ // Create our blank image.
+ texture_size = d.getOptimalSize(!driver->queryFeature(video::EVDF_TEXTURE_NPOT), !driver->queryFeature(video::EVDF_TEXTURE_NSQUARE), true, 0);
+ image = driver->createImage(video::ECF_A8R8G8B8, texture_size);
+ image->fill(video::SColor(0, 255, 255, 255));
+
+ // Load the grayscale data in.
+ const float gray_count = static_cast<float>(bits.num_grays);
+ const u32 image_pitch = image->getPitch() / sizeof(u32);
+ u32* image_data = (u32*)image->lock();
+ u8* glyph_data = bits.buffer;
+ for (s32 y = 0; y < bits.rows; ++y)
+ {
+ u8* row = glyph_data;
+ for (s32 x = 0; x < bits.width; ++x)
+ {
+ image_data[y * image_pitch + x] |= static_cast<u32>(255.0f * (static_cast<float>(*row++) / gray_count)) << 24;
+ //data[y * image_pitch + x] |= ((u32)(*bitsdata++) << 24);
+ }
+ glyph_data += bits.pitch;
+ }
+ image->unlock();
+ break;
+ }
+ default:
+ // TODO: error message?
+ return 0;
+ }
+ return image;
+}
+
+void SGUITTGlyph::preload(u32 char_index, FT_Face face, video::IVideoDriver* driver, u32 font_size, const FT_Int32 loadFlags)
+{
+ if (isLoaded) return;
+
+ // Set the size of the glyph.
+ FT_Set_Pixel_Sizes(face, 0, font_size);
+
+ // Attempt to load the glyph.
+ if (FT_Load_Glyph(face, char_index, loadFlags) != FT_Err_Ok)
+ // TODO: error message?
+ return;
+
+ FT_GlyphSlot glyph = face->glyph;
+ FT_Bitmap bits = glyph->bitmap;
+
+ // Setup the glyph information here:
+ advance = glyph->advance;
+ offset = core::vector2di(glyph->bitmap_left, glyph->bitmap_top);
+
+ // Try to get the last page with available slots.
+ CGUITTGlyphPage* page = parent->getLastGlyphPage();
+
+ // If we need to make a new page, do that now.
+ if (!page)
+ {
+ page = parent->createGlyphPage(bits.pixel_mode);
+ if (!page)
+ // TODO: add error message?
+ return;
+ }
+
+ glyph_page = parent->getLastGlyphPageIndex();
+ u32 texture_side_length = page->texture->getOriginalSize().Width;
+ core::vector2di page_position(
+ (page->used_slots % (texture_side_length / font_size)) * font_size,
+ (page->used_slots / (texture_side_length / font_size)) * font_size
+ );
+ source_rect.UpperLeftCorner = page_position;
+ source_rect.LowerRightCorner = core::vector2di(page_position.X + bits.width, page_position.Y + bits.rows);
+
+ page->dirty = true;
+ ++page->used_slots;
+ --page->available_slots;
+
+ // We grab the glyph bitmap here so the data won't be removed when the next glyph is loaded.
+ surface = createGlyphImage(bits, driver);
+
+ // Set our glyph as loaded.
+ isLoaded = true;
+}
+
+void SGUITTGlyph::unload()
+{
+ if (surface)
+ {
+ surface->drop();
+ surface = 0;
+ }
+ isLoaded = false;
+}
+
+//////////////////////
+
+CGUITTFont* CGUITTFont::createTTFont(IGUIEnvironment *env, const io::path& filename, const u32 size, const bool antialias, const bool transparency)
+{
+ if (!c_libraryLoaded)
+ {
+ if (FT_Init_FreeType(&c_library))
+ return 0;
+ c_libraryLoaded = true;
+ }
+
+ CGUITTFont* font = new CGUITTFont(env);
+ bool ret = font->load(filename, size, antialias, transparency);
+ if (!ret)
+ {
+ font->drop();
+ return 0;
+ }
+
+ return font;
+}
+
+CGUITTFont* CGUITTFont::createTTFont(IrrlichtDevice *device, const io::path& filename, const u32 size, const bool antialias, const bool transparency)
+{
+ if (!c_libraryLoaded)
+ {
+ if (FT_Init_FreeType(&c_library))
+ return 0;
+ c_libraryLoaded = true;
+ }
+
+ CGUITTFont* font = new CGUITTFont(device->getGUIEnvironment());
+ font->Device = device;
+ bool ret = font->load(filename, size, antialias, transparency);
+ if (!ret)
+ {
+ font->drop();
+ return 0;
+ }
+
+ return font;
+}
+
+CGUITTFont* CGUITTFont::create(IGUIEnvironment *env, const io::path& filename, const u32 size, const bool antialias, const bool transparency)
+{
+ return CGUITTFont::createTTFont(env, filename, size, antialias, transparency);
+}
+
+CGUITTFont* CGUITTFont::create(IrrlichtDevice *device, const io::path& filename, const u32 size, const bool antialias, const bool transparency)
+{
+ return CGUITTFont::createTTFont(device, filename, size, antialias, transparency);
+}
+
+//////////////////////
+
+//! Constructor.
+CGUITTFont::CGUITTFont(IGUIEnvironment *env)
+: use_monochrome(false), use_transparency(true), use_hinting(true), use_auto_hinting(true),
+batch_load_size(1), Device(0), Environment(env), Driver(0), GlobalKerningWidth(0), GlobalKerningHeight(0)
+{
+ #ifdef _DEBUG
+ setDebugName("CGUITTFont");
+ #endif
+
+ if (Environment)
+ {
+ // don't grab environment, to avoid circular references
+ Driver = Environment->getVideoDriver();
+ }
+
+ if (Driver)
+ Driver->grab();
+
+ setInvisibleCharacters(L" ");
+
+ // Glyphs aren't reference counted, so don't try to delete them when we free the array.
+ Glyphs.set_free_when_destroyed(false);
+}
+
+bool CGUITTFont::load(const io::path& filename, const u32 size, const bool antialias, const bool transparency)
+{
+ // Some sanity checks.
+ if (Environment == 0 || Driver == 0) return false;
+ if (size == 0) return false;
+ if (filename.size() == 0) return false;
+
+ io::IFileSystem* filesystem = Environment->getFileSystem();
+ irr::ILogger* logger = (Device != 0 ? Device->getLogger() : 0);
+ this->size = size;
+ this->filename = filename;
+
+ // Update the font loading flags when the font is first loaded.
+ this->use_monochrome = !antialias;
+ this->use_transparency = transparency;
+ update_load_flags();
+
+ // Log.
+ if (logger)
+ logger->log(L"CGUITTFont", core::stringw(core::stringw(L"Creating new font: ") + core::ustring(filename).toWCHAR_s() + L" " + core::stringc(size) + L"pt " + (antialias ? L"+antialias " : L"-antialias ") + (transparency ? L"+transparency" : L"-transparency")).c_str(), irr::ELL_INFORMATION);
+
+ // Grab the face.
+ SGUITTFace* face = 0;
+ core::map<io::path, SGUITTFace*>::Node* node = c_faces.find(filename);
+ if (node == 0)
+ {
+ face = new SGUITTFace();
+ c_faces.set(filename, face);
+
+ if (filesystem)
+ {
+ // Read in the file data.
+ io::IReadFile* file = filesystem->createAndOpenFile(filename);
+ if (file == 0)
+ {
+ if (logger) logger->log(L"CGUITTFont", L"Failed to open the file.", irr::ELL_INFORMATION);
+
+ c_faces.remove(filename);
+ delete face;
+ face = 0;
+ return false;
+ }
+ face->face_buffer = new FT_Byte[file->getSize()];
+ file->read(face->face_buffer, file->getSize());
+ face->face_buffer_size = file->getSize();
+ file->drop();
+
+ // Create the face.
+ if (FT_New_Memory_Face(c_library, face->face_buffer, face->face_buffer_size, 0, &face->face))
+ {
+ if (logger) logger->log(L"CGUITTFont", L"FT_New_Memory_Face failed.", irr::ELL_INFORMATION);
+
+ c_faces.remove(filename);
+ delete face;
+ face = 0;
+ return false;
+ }
+ }
+ else
+ {
+ core::ustring converter(filename);
+ if (FT_New_Face(c_library, reinterpret_cast<const char*>(converter.toUTF8_s().c_str()), 0, &face->face))
+ {
+ if (logger) logger->log(L"CGUITTFont", L"FT_New_Face failed.", irr::ELL_INFORMATION);
+
+ c_faces.remove(filename);
+ delete face;
+ face = 0;
+ return false;
+ }
+ }
+ }
+ else
+ {
+ // Using another instance of this face.
+ face = node->getValue();
+ face->grab();
+ }
+
+ // Store our face.
+ tt_face = face->face;
+
+ // Store font metrics.
+ FT_Set_Pixel_Sizes(tt_face, size, 0);
+ font_metrics = tt_face->size->metrics;
+
+ // Allocate our glyphs.
+ Glyphs.clear();
+ Glyphs.reallocate(tt_face->num_glyphs);
+ Glyphs.set_used(tt_face->num_glyphs);
+ for (FT_Long i = 0; i < tt_face->num_glyphs; ++i)
+ {
+ Glyphs[i].isLoaded = false;
+ Glyphs[i].glyph_page = 0;
+ Glyphs[i].source_rect = core::recti();
+ Glyphs[i].offset = core::vector2di();
+ Glyphs[i].advance = FT_Vector();
+ Glyphs[i].surface = 0;
+ Glyphs[i].parent = this;
+ }
+
+ // Cache the first 127 ascii characters.
+ u32 old_size = batch_load_size;
+ batch_load_size = 127;
+ getGlyphIndexByChar((uchar32_t)0);
+ batch_load_size = old_size;
+
+ return true;
+}
+
+CGUITTFont::~CGUITTFont()
+{
+ // Delete the glyphs and glyph pages.
+ reset_images();
+ CGUITTAssistDelete::Delete(Glyphs);
+ //Glyphs.clear();
+
+ // We aren't using this face anymore.
+ core::map<io::path, SGUITTFace*>::Node* n = c_faces.find(filename);
+ if (n)
+ {
+ SGUITTFace* f = n->getValue();
+
+ // Drop our face. If this was the last face, the destructor will clean up.
+ if (f->drop())
+ c_faces.remove(filename);
+
+ // If there are no more faces referenced by FreeType, clean up.
+ if (c_faces.size() == 0)
+ {
+ FT_Done_FreeType(c_library);
+ c_libraryLoaded = false;
+ }
+ }
+
+ // Drop our driver now.
+ if (Driver)
+ Driver->drop();
+}
+
+void CGUITTFont::reset_images()
+{
+ // Delete the glyphs.
+ for (u32 i = 0; i != Glyphs.size(); ++i)
+ Glyphs[i].unload();
+
+ // Unload the glyph pages from video memory.
+ for (u32 i = 0; i != Glyph_Pages.size(); ++i)
+ delete Glyph_Pages[i];
+ Glyph_Pages.clear();
+
+ // Always update the internal FreeType loading flags after resetting.
+ update_load_flags();
+}
+
+void CGUITTFont::update_glyph_pages() const
+{
+ for (u32 i = 0; i != Glyph_Pages.size(); ++i)
+ {
+ if (Glyph_Pages[i]->dirty)
+ Glyph_Pages[i]->updateTexture();
+ }
+}
+
+CGUITTGlyphPage* CGUITTFont::getLastGlyphPage() const
+{
+ CGUITTGlyphPage* page = 0;
+ if (Glyph_Pages.empty())
+ return 0;
+ else
+ {
+ page = Glyph_Pages[getLastGlyphPageIndex()];
+ if (page->available_slots == 0)
+ page = 0;
+ }
+ return page;
+}
+
+CGUITTGlyphPage* CGUITTFont::createGlyphPage(const u8& pixel_mode)
+{
+ CGUITTGlyphPage* page = 0;
+
+ // Name of our page.
+ io::path name("TTFontGlyphPage_");
+ name += tt_face->family_name;
+ name += ".";
+ name += tt_face->style_name;
+ name += ".";
+ name += size;
+ name += "_";
+ name += Glyph_Pages.size(); // The newly created page will be at the end of the collection.
+
+ // Create the new page.
+ page = new CGUITTGlyphPage(Driver, name);
+
+ // Determine our maximum texture size.
+ // If we keep getting 0, set it to 1024x1024, as that number is pretty safe.
+ core::dimension2du max_texture_size = max_page_texture_size;
+ if (max_texture_size.Width == 0 || max_texture_size.Height == 0)
+ max_texture_size = Driver->getMaxTextureSize();
+ if (max_texture_size.Width == 0 || max_texture_size.Height == 0)
+ max_texture_size = core::dimension2du(1024, 1024);
+
+ // We want to try to put at least 144 glyphs on a single texture.
+ core::dimension2du page_texture_size;
+ if (size <= 21) page_texture_size = core::dimension2du(256, 256);
+ else if (size <= 42) page_texture_size = core::dimension2du(512, 512);
+ else if (size <= 84) page_texture_size = core::dimension2du(1024, 1024);
+ else if (size <= 168) page_texture_size = core::dimension2du(2048, 2048);
+ else page_texture_size = core::dimension2du(4096, 4096);
+
+ if (page_texture_size.Width > max_texture_size.Width || page_texture_size.Height > max_texture_size.Height)
+ page_texture_size = max_texture_size;
+
+ if (!page->createPageTexture(pixel_mode, page_texture_size))
+ // TODO: add error message?
+ return 0;
+
+ if (page)
+ {
+ // Determine the number of glyph slots on the page and add it to the list of pages.
+ page->available_slots = (page_texture_size.Width / size) * (page_texture_size.Height / size);
+ Glyph_Pages.push_back(page);
+ }
+ return page;
+}
+
+void CGUITTFont::setTransparency(const bool flag)
+{
+ use_transparency = flag;
+ reset_images();
+}
+
+void CGUITTFont::setMonochrome(const bool flag)
+{
+ use_monochrome = flag;
+ reset_images();
+}
+
+void CGUITTFont::setFontHinting(const bool enable, const bool enable_auto_hinting)
+{
+ use_hinting = enable;
+ use_auto_hinting = enable_auto_hinting;
+ reset_images();
+}
+
+void CGUITTFont::draw(const core::stringw& text, const core::rect<s32>& position, video::SColor color, bool hcenter, bool vcenter, const core::rect<s32>* clip)
+{
+ if (!Driver)
+ return;
+
+ // Clear the glyph pages of their render information.
+ for (u32 i = 0; i < Glyph_Pages.size(); ++i)
+ {
+ Glyph_Pages[i]->render_positions.clear();
+ Glyph_Pages[i]->render_source_rects.clear();
+ }
+
+ // Set up some variables.
+ core::dimension2d<s32> textDimension;
+ core::position2d<s32> offset = position.UpperLeftCorner;
+
+ // Determine offset positions.
+ if (hcenter || vcenter)
+ {
+ textDimension = getDimension(text.c_str());
+
+ if (hcenter)
+ offset.X = ((position.getWidth() - textDimension.Width) >> 1) + offset.X;
+
+ if (vcenter)
+ offset.Y = ((position.getHeight() - textDimension.Height) >> 1) + offset.Y;
+ }
+
+ // Convert to a unicode string.
+ core::ustring utext(text);
+
+ // Set up our render map.
+ core::map<u32, CGUITTGlyphPage*> Render_Map;
+
+ // Start parsing characters.
+ u32 n;
+ uchar32_t previousChar = 0;
+ core::ustring::const_iterator iter(utext);
+ while (!iter.atEnd())
+ {
+ uchar32_t currentChar = *iter;
+ n = getGlyphIndexByChar(currentChar);
+ bool visible = (Invisible.findFirst(currentChar) == -1);
+ if (n > 0 && visible)
+ {
+ bool lineBreak=false;
+ if (currentChar == L'\r') // Mac or Windows breaks
+ {
+ lineBreak = true;
+ if (*(iter + 1) == (uchar32_t)'\n') // Windows line breaks.
+ currentChar = *(++iter);
+ }
+ else if (currentChar == (uchar32_t)'\n') // Unix breaks
+ {
+ lineBreak = true;
+ }
+
+ if (lineBreak)
+ {
+ previousChar = 0;
+ offset.Y += font_metrics.ascender / 64;
+ offset.X = position.UpperLeftCorner.X;
+
+ if (hcenter)
+ offset.X += (position.getWidth() - textDimension.Width) >> 1;
+ ++iter;
+ continue;
+ }
+
+ // Calculate the glyph offset.
+ s32 offx = Glyphs[n-1].offset.X;
+ s32 offy = (font_metrics.ascender / 64) - Glyphs[n-1].offset.Y;
+
+ // Apply kerning.
+ core::vector2di k = getKerning(currentChar, previousChar);
+ offset.X += k.X;
+ offset.Y += k.Y;
+
+ // Determine rendering information.
+ SGUITTGlyph& glyph = Glyphs[n-1];
+ CGUITTGlyphPage* const page = Glyph_Pages[glyph.glyph_page];
+ page->render_positions.push_back(core::position2di(offset.X + offx, offset.Y + offy));
+ page->render_source_rects.push_back(glyph.source_rect);
+ Render_Map.set(glyph.glyph_page, page);
+ }
+ offset.X += getWidthFromCharacter(currentChar);
+
+ previousChar = currentChar;
+ ++iter;
+ }
+
+ // Draw now.
+ update_glyph_pages();
+ core::map<u32, CGUITTGlyphPage*>::Iterator j = Render_Map.getIterator();
+ while (!j.atEnd())
+ {
+ core::map<u32, CGUITTGlyphPage*>::Node* n = j.getNode();
+ j++;
+ if (n == 0) continue;
+
+ CGUITTGlyphPage* page = n->getValue();
+
+ if (!use_transparency) color.color |= 0xff000000;
+ Driver->draw2DImageBatch(page->texture, page->render_positions, page->render_source_rects, clip, color, true);
+ }
+}
+
+core::dimension2d<u32> CGUITTFont::getCharDimension(const wchar_t ch) const
+{
+ return core::dimension2d<u32>(getWidthFromCharacter(ch), getHeightFromCharacter(ch));
+}
+
+core::dimension2d<u32> CGUITTFont::getDimension(const wchar_t* text) const
+{
+ return getDimension(core::ustring(text));
+}
+
+core::dimension2d<u32> CGUITTFont::getDimension(const core::ustring& text) const
+{
+ // Get the maximum font height. Unfortunately, we have to do this hack as
+ // Irrlicht will draw things wrong. In FreeType, the font size is the
+ // maximum size for a single glyph, but that glyph may hang "under" the
+ // draw line, increasing the total font height to beyond the set size.
+ // Irrlicht does not understand this concept when drawing fonts. Also, I
+ // add +1 to give it a 1 pixel blank border. This makes things like
+ // tooltips look nicer.
+ s32 test1 = getHeightFromCharacter((uchar32_t)'g') + 1;
+ s32 test2 = getHeightFromCharacter((uchar32_t)'j') + 1;
+ s32 test3 = getHeightFromCharacter((uchar32_t)'_') + 1;
+ s32 max_font_height = core::max_(test1, core::max_(test2, test3));
+
+ core::dimension2d<u32> text_dimension(0, max_font_height);
+ core::dimension2d<u32> line(0, max_font_height);
+
+ uchar32_t previousChar = 0;
+ core::ustring::const_iterator iter = text.begin();
+ for (; !iter.atEnd(); ++iter)
+ {
+ uchar32_t p = *iter;
+ bool lineBreak = false;
+ if (p == '\r') // Mac or Windows line breaks.
+ {
+ lineBreak = true;
+ if (*(iter + 1) == '\n')
+ {
+ ++iter;
+ p = *iter;
+ }
+ }
+ else if (p == '\n') // Unix line breaks.
+ {
+ lineBreak = true;
+ }
+
+ // Kerning.
+ core::vector2di k = getKerning(p, previousChar);
+ line.Width += k.X;
+ previousChar = p;
+
+ // Check for linebreak.
+ if (lineBreak)
+ {
+ previousChar = 0;
+ text_dimension.Height += line.Height;
+ if (text_dimension.Width < line.Width)
+ text_dimension.Width = line.Width;
+ line.Width = 0;
+ line.Height = max_font_height;
+ continue;
+ }
+ line.Width += getWidthFromCharacter(p);
+ }
+ if (text_dimension.Width < line.Width)
+ text_dimension.Width = line.Width;
+
+ return text_dimension;
+}
+
+inline u32 CGUITTFont::getWidthFromCharacter(wchar_t c) const
+{
+ return getWidthFromCharacter((uchar32_t)c);
+}
+
+inline u32 CGUITTFont::getWidthFromCharacter(uchar32_t c) const
+{
+ // Set the size of the face.
+ // This is because we cache faces and the face may have been set to a different size.
+ //FT_Set_Pixel_Sizes(tt_face, 0, size);
+
+ u32 n = getGlyphIndexByChar(c);
+ if (n > 0)
+ {
+ int w = Glyphs[n-1].advance.x / 64;
+ return w;
+ }
+ if (c >= 0x2000)
+ return (font_metrics.ascender / 64);
+ else return (font_metrics.ascender / 64) / 2;
+}
+
+inline u32 CGUITTFont::getHeightFromCharacter(wchar_t c) const
+{
+ return getHeightFromCharacter((uchar32_t)c);
+}
+
+inline u32 CGUITTFont::getHeightFromCharacter(uchar32_t c) const
+{
+ // Set the size of the face.
+ // This is because we cache faces and the face may have been set to a different size.
+ //FT_Set_Pixel_Sizes(tt_face, 0, size);
+
+ u32 n = getGlyphIndexByChar(c);
+ if (n > 0)
+ {
+ // Grab the true height of the character, taking into account underhanging glyphs.
+ s32 height = (font_metrics.ascender / 64) - Glyphs[n-1].offset.Y + Glyphs[n-1].source_rect.getHeight();
+ return height;
+ }
+ if (c >= 0x2000)
+ return (font_metrics.ascender / 64);
+ else return (font_metrics.ascender / 64) / 2;
+}
+
+u32 CGUITTFont::getGlyphIndexByChar(wchar_t c) const
+{
+ return getGlyphIndexByChar((uchar32_t)c);
+}
+
+u32 CGUITTFont::getGlyphIndexByChar(uchar32_t c) const
+{
+ // Get the glyph.
+ u32 glyph = FT_Get_Char_Index(tt_face, c);
+
+ // Check for a valid glyph. If it is invalid, attempt to use the replacement character.
+ if (glyph == 0)
+ glyph = FT_Get_Char_Index(tt_face, core::unicode::UTF_REPLACEMENT_CHARACTER);
+
+ // If our glyph is already loaded, don't bother doing any batch loading code.
+ if (glyph != 0 && Glyphs[glyph - 1].isLoaded)
+ return glyph;
+
+ // Determine our batch loading positions.
+ u32 half_size = (batch_load_size / 2);
+ u32 start_pos = 0;
+ if (c > half_size) start_pos = c - half_size;
+ u32 end_pos = start_pos + batch_load_size;
+
+ // Load all our characters.
+ do
+ {
+ // Get the character we are going to load.
+ u32 char_index = FT_Get_Char_Index(tt_face, start_pos);
+
+ // If the glyph hasn't been loaded yet, do it now.
+ if (char_index)
+ {
+ SGUITTGlyph& glyph = Glyphs[char_index - 1];
+ if (!glyph.isLoaded)
+ {
+ glyph.preload(char_index, tt_face, Driver, size, load_flags);
+ Glyph_Pages[glyph.glyph_page]->pushGlyphToBePaged(&glyph);
+ }
+ }
+ }
+ while (++start_pos < end_pos);
+
+ // Return our original character.
+ return glyph;
+}
+
+s32 CGUITTFont::getCharacterFromPos(const wchar_t* text, s32 pixel_x) const
+{
+ return getCharacterFromPos(core::ustring(text), pixel_x);
+}
+
+s32 CGUITTFont::getCharacterFromPos(const core::ustring& text, s32 pixel_x) const
+{
+ s32 x = 0;
+ //s32 idx = 0;
+
+ u32 character = 0;
+ uchar32_t previousChar = 0;
+ core::ustring::const_iterator iter = text.begin();
+ while (!iter.atEnd())
+ {
+ uchar32_t c = *iter;
+ x += getWidthFromCharacter(c);
+
+ // Kerning.
+ core::vector2di k = getKerning(c, previousChar);
+ x += k.X;
+
+ if (x >= pixel_x)
+ return character;
+
+ previousChar = c;
+ ++iter;
+ ++character;
+ }
+
+ return -1;
+}
+
+void CGUITTFont::setKerningWidth(s32 kerning)
+{
+ GlobalKerningWidth = kerning;
+}
+
+void CGUITTFont::setKerningHeight(s32 kerning)
+{
+ GlobalKerningHeight = kerning;
+}
+
+s32 CGUITTFont::getKerningWidth(const wchar_t* thisLetter, const wchar_t* previousLetter) const
+{
+ if (tt_face == 0)
+ return GlobalKerningWidth;
+ if (thisLetter == 0 || previousLetter == 0)
+ return 0;
+
+ return getKerningWidth((uchar32_t)*thisLetter, (uchar32_t)*previousLetter);
+}
+
+s32 CGUITTFont::getKerningWidth(const uchar32_t thisLetter, const uchar32_t previousLetter) const
+{
+ // Return only the kerning width.
+ return getKerning(thisLetter, previousLetter).X;
+}
+
+s32 CGUITTFont::getKerningHeight() const
+{
+ // FreeType 2 currently doesn't return any height kerning information.
+ return GlobalKerningHeight;
+}
+
+core::vector2di CGUITTFont::getKerning(const wchar_t thisLetter, const wchar_t previousLetter) const
+{
+ return getKerning((uchar32_t)thisLetter, (uchar32_t)previousLetter);
+}
+
+core::vector2di CGUITTFont::getKerning(const uchar32_t thisLetter, const uchar32_t previousLetter) const
+{
+ if (tt_face == 0 || thisLetter == 0 || previousLetter == 0)
+ return core::vector2di();
+
+ // Set the size of the face.
+ // This is because we cache faces and the face may have been set to a different size.
+ FT_Set_Pixel_Sizes(tt_face, 0, size);
+
+ core::vector2di ret(GlobalKerningWidth, GlobalKerningHeight);
+
+ // If we don't have kerning, no point in continuing.
+ if (!FT_HAS_KERNING(tt_face))
+ return ret;
+
+ // Get the kerning information.
+ FT_Vector v;
+ FT_Get_Kerning(tt_face, getGlyphIndexByChar(previousLetter), getGlyphIndexByChar(thisLetter), FT_KERNING_DEFAULT, &v);
+
+ // If we have a scalable font, the return value will be in font points.
+ if (FT_IS_SCALABLE(tt_face))
+ {
+ // Font points, so divide by 64.
+ ret.X += (v.x / 64);
+ ret.Y += (v.y / 64);
+ }
+ else
+ {
+ // Pixel units.
+ ret.X += v.x;
+ ret.Y += v.y;
+ }
+ return ret;
+}
+
+void CGUITTFont::setInvisibleCharacters(const wchar_t *s)
+{
+ core::ustring us(s);
+ Invisible = us;
+}
+
+void CGUITTFont::setInvisibleCharacters(const core::ustring& s)
+{
+ Invisible = s;
+}
+
+video::IImage* CGUITTFont::createTextureFromChar(const uchar32_t& ch)
+{
+ u32 n = getGlyphIndexByChar(ch);
+ const SGUITTGlyph& glyph = Glyphs[n-1];
+ CGUITTGlyphPage* page = Glyph_Pages[glyph.glyph_page];
+
+ if (page->dirty)
+ page->updateTexture();
+
+ video::ITexture* tex = page->texture;
+
+ // Acquire a read-only lock of the corresponding page texture.
+ #if IRRLICHT_VERSION_MAJOR==1 && IRRLICHT_VERSION_MINOR>=8
+ void* ptr = tex->lock(video::ETLM_READ_ONLY);
+ #else
+ void* ptr = tex->lock(true);
+ #endif
+
+ video::ECOLOR_FORMAT format = tex->getColorFormat();
+ core::dimension2du tex_size = tex->getOriginalSize();
+ video::IImage* pageholder = Driver->createImageFromData(format, tex_size, ptr, true, false);
+
+ // Copy the image data out of the page texture.
+ core::dimension2du glyph_size(glyph.source_rect.getSize());
+ video::IImage* image = Driver->createImage(format, glyph_size);
+ pageholder->copyTo(image, core::position2di(0, 0), glyph.source_rect);
+
+ tex->unlock();
+ return image;
+}
+
+video::ITexture* CGUITTFont::getPageTextureByIndex(const u32& page_index) const
+{
+ if (page_index < Glyph_Pages.size())
+ return Glyph_Pages[page_index]->texture;
+ else
+ return 0;
+}
+
+void CGUITTFont::createSharedPlane()
+{
+ /*
+ 2___3
+ | /|
+ | / | <-- plane mesh is like this, point 2 is (0,0), point 0 is (0, -1)
+ |/ | <-- the texture coords of point 2 is (0,0, point 0 is (0, 1)
+ 0---1
+ */
+
+ using namespace core;
+ using namespace video;
+ using namespace scene;
+ S3DVertex vertices[4];
+ u16 indices[6] = {0,2,3,3,1,0};
+ vertices[0] = S3DVertex(vector3df(0,-1,0), vector3df(0,0,-1), SColor(255,255,255,255), vector2df(0,1));
+ vertices[1] = S3DVertex(vector3df(1,-1,0), vector3df(0,0,-1), SColor(255,255,255,255), vector2df(1,1));
+ vertices[2] = S3DVertex(vector3df(0, 0,0), vector3df(0,0,-1), SColor(255,255,255,255), vector2df(0,0));
+ vertices[3] = S3DVertex(vector3df(1, 0,0), vector3df(0,0,-1), SColor(255,255,255,255), vector2df(1,0));
+
+ SMeshBuffer* buf = new SMeshBuffer();
+ buf->append(vertices, 4, indices, 6);
+
+ shared_plane_.addMeshBuffer( buf );
+
+ shared_plane_ptr_ = &shared_plane_;
+ buf->drop(); //the addMeshBuffer method will grab it, so we can drop this ptr.
+}
+
+core::dimension2d<u32> CGUITTFont::getDimensionUntilEndOfLine(const wchar_t* p) const
+{
+ core::stringw s;
+ for (const wchar_t* temp = p; temp && *temp != '\0' && *temp != L'\r' && *temp != L'\n'; ++temp )
+ s.append(*temp);
+
+ return getDimension(s.c_str());
+}
+
+core::array<scene::ISceneNode*> CGUITTFont::addTextSceneNode(const wchar_t* text, scene::ISceneManager* smgr, scene::ISceneNode* parent, const video::SColor& color, bool center)
+{
+ using namespace core;
+ using namespace video;
+ using namespace scene;
+
+ array<scene::ISceneNode*> container;
+
+ if (!Driver || !smgr) return container;
+ if (!parent)
+ parent = smgr->addEmptySceneNode(smgr->getRootSceneNode(), -1);
+ // if you don't specify parent, then we add a empty node attached to the root node
+ // this is generally undesirable.
+
+ if (!shared_plane_ptr_) //this points to a static mesh that contains the plane
+ createSharedPlane(); //if it's not initialized, we create one.
+
+ dimension2d<s32> text_size(getDimension(text)); //convert from unsigned to signed.
+ vector3df start_point(0, 0, 0), offset;
+
+ /** NOTICE:
+ Because we are considering adding texts into 3D world, all Y axis vectors are inverted.
+ **/
+
+ // There's currently no "vertical center" concept when you apply text scene node to the 3D world.
+ if (center)
+ {
+ offset.X = start_point.X = -text_size.Width / 2.f;
+ offset.Y = start_point.Y = +text_size.Height/ 2.f;
+ offset.X += (text_size.Width - getDimensionUntilEndOfLine(text).Width) >> 1;
+ }
+
+ // the default font material
+ SMaterial mat;
+ mat.setFlag(video::EMF_LIGHTING, true);
+ mat.setFlag(video::EMF_ZWRITE_ENABLE, false);
+ mat.setFlag(video::EMF_NORMALIZE_NORMALS, true);
+ mat.ColorMaterial = video::ECM_NONE;
+ mat.MaterialType = use_transparency ? video::EMT_TRANSPARENT_ALPHA_CHANNEL : video::EMT_SOLID;
+ mat.MaterialTypeParam = 0.01f;
+ mat.DiffuseColor = color;
+
+ wchar_t current_char = 0, previous_char = 0;
+ u32 n = 0;
+
+ array<u32> glyph_indices;
+
+ while (*text)
+ {
+ current_char = *text;
+ bool line_break=false;
+ if (current_char == L'\r') // Mac or Windows breaks
+ {
+ line_break = true;
+ if (*(text + 1) == L'\n') // Windows line breaks.
+ current_char = *(++text);
+ }
+ else if (current_char == L'\n') // Unix breaks
+ {
+ line_break = true;
+ }
+
+ if (line_break)
+ {
+ previous_char = 0;
+ offset.Y -= tt_face->size->metrics.ascender / 64;
+ offset.X = start_point.X;
+ if (center)
+ offset.X += (text_size.Width - getDimensionUntilEndOfLine(text+1).Width) >> 1;
+ ++text;
+ }
+ else
+ {
+ n = getGlyphIndexByChar(current_char);
+ if (n > 0)
+ {
+ glyph_indices.push_back( n );
+
+ // Store glyph size and offset informations.
+ SGUITTGlyph const& glyph = Glyphs[n-1];
+ u32 texw = glyph.source_rect.getWidth();
+ u32 texh = glyph.source_rect.getHeight();
+ s32 offx = glyph.offset.X;
+ s32 offy = (font_metrics.ascender / 64) - glyph.offset.Y;
+
+ // Apply kerning.
+ vector2di k = getKerning(current_char, previous_char);
+ offset.X += k.X;
+ offset.Y += k.Y;
+
+ vector3df current_pos(offset.X + offx, offset.Y - offy, 0);
+ dimension2d<u32> letter_size = dimension2d<u32>(texw, texh);
+
+ // Now we copy planes corresponding to the letter size.
+ IMeshManipulator* mani = smgr->getMeshManipulator();
+ IMesh* meshcopy = mani->createMeshCopy(shared_plane_ptr_);
+ #if IRRLICHT_VERSION_MAJOR==1 && IRRLICHT_VERSION_MINOR>=8
+ mani->scale(meshcopy, vector3df((f32)letter_size.Width, (f32)letter_size.Height, 1));
+ #else
+ mani->scaleMesh(meshcopy, vector3df((f32)letter_size.Width, (f32)letter_size.Height, 1));
+ #endif
+
+ ISceneNode* current_node = smgr->addMeshSceneNode(meshcopy, parent, -1, current_pos);
+ meshcopy->drop();
+
+ current_node->getMaterial(0) = mat;
+ current_node->setAutomaticCulling(EAC_OFF);
+ current_node->setIsDebugObject(true); //so the picking won't have any effect on individual letter
+ //current_node->setDebugDataVisible(EDS_BBOX); //de-comment this when debugging
+
+ container.push_back(current_node);
+ }
+ offset.X += getWidthFromCharacter(current_char);
+ previous_char = current_char;
+ ++text;
+ }
+ }
+
+ update_glyph_pages();
+ //only after we update the textures can we use the glyph page textures.
+
+ for (u32 i = 0; i < glyph_indices.size(); ++i)
+ {
+ u32 n = glyph_indices[i];
+ SGUITTGlyph const& glyph = Glyphs[n-1];
+ ITexture* current_tex = Glyph_Pages[glyph.glyph_page]->texture;
+ f32 page_texture_size = (f32)current_tex->getSize().Width;
+ //Now we calculate the UV position according to the texture size and the source rect.
+ //
+ // 2___3
+ // | /|
+ // | / | <-- plane mesh is like this, point 2 is (0,0), point 0 is (0, -1)
+ // |/ | <-- the texture coords of point 2 is (0,0, point 0 is (0, 1)
+ // 0---1
+ //
+ f32 u1 = glyph.source_rect.UpperLeftCorner.X / page_texture_size;
+ f32 u2 = u1 + (glyph.source_rect.getWidth() / page_texture_size);
+ f32 v1 = glyph.source_rect.UpperLeftCorner.Y / page_texture_size;
+ f32 v2 = v1 + (glyph.source_rect.getHeight() / page_texture_size);
+
+ //we can be quite sure that this is IMeshSceneNode, because we just added them in the above loop.
+ IMeshSceneNode* node = static_cast<IMeshSceneNode*>(container[i]);
+
+ S3DVertex* pv = static_cast<S3DVertex*>(node->getMesh()->getMeshBuffer(0)->getVertices());
+ //pv[0].TCoords.Y = pv[1].TCoords.Y = (letter_size.Height - 1) / static_cast<f32>(letter_size.Height);
+ //pv[1].TCoords.X = pv[3].TCoords.X = (letter_size.Width - 1) / static_cast<f32>(letter_size.Width);
+ pv[0].TCoords = vector2df(u1, v2);
+ pv[1].TCoords = vector2df(u2, v2);
+ pv[2].TCoords = vector2df(u1, v1);
+ pv[3].TCoords = vector2df(u2, v1);
+
+ container[i]->getMaterial(0).setTexture(0, current_tex);
+ }
+
+ return container;
+}
+
+} // end namespace gui
+} // end namespace irr