5036cfe566
Need to test: localassetbrowser preview related floaters hgfloatertexteditor maps media textures! Currently very hacky web browser alpha masks on avatars bumpmaps Are all sky components appearing? LLViewerDynamicTexture (texture baking, browser, animated textures, anim previews, etc) Snapshot related features Customize avatar vfs floater UI textures in general Texture priority issues
272 lines
8.9 KiB
C++
272 lines
8.9 KiB
C++
/**
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* @file llfontgl.h
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* @author Doug Soo
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* @brief Wrapper around FreeType
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLFONTGL_H
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#define LL_LLFONTGL_H
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#include "llfont.h"
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#include "lltexture.h"
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#include "v2math.h"
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#include "llcoord.h"
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#include "llrect.h"
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#include "llfontregistry.h"
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class LLColor4;
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// Key used to request a font.
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class LLFontDescriptor;
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// Structure used to store previously requested fonts.
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class LLFontRegistry;
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class LLFontGL : public LLFont
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{
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public:
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enum HAlign
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{
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// Horizontal location of x,y coord to render.
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LEFT = 0, // Left align
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RIGHT = 1, // Right align
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HCENTER = 2, // Center
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};
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enum VAlign
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{
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// Vertical location of x,y coord to render.
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TOP = 3, // Top align
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VCENTER = 4, // Center
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BASELINE = 5, // Baseline
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BOTTOM = 6 // Bottom
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};
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enum StyleFlags
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{
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// text style to render. May be combined (these are bit flags)
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NORMAL = 0,
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BOLD = 1,
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ITALIC = 2,
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UNDERLINE = 4,
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DROP_SHADOW = 8,
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DROP_SHADOW_SOFT = 16
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};
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// Takes a string with potentially several flags, i.e. "NORMAL|BOLD|ITALIC"
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static U8 getStyleFromString(const std::string &style);
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LLFontGL();
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LLFontGL(const LLFontGL &source);
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~LLFontGL();
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void init(); // Internal init, or reinitialization
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void reset(); // Reset a font after GL cleanup. ONLY works on an already loaded font.
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LLFontGL &operator=(const LLFontGL &source);
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static BOOL initDefaultFonts(F32 screen_dpi, F32 x_scale, F32 y_scale,
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const std::string& app_dir,
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const std::vector<std::string>& xui_paths,
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bool create_gl_textures = true);
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static void destroyDefaultFonts();
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static void destroyAllGL();
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void destroyGL();
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/* virtual*/ BOOL loadFace(const std::string& filename,
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const F32 point_size, const F32 vert_dpi, const F32 horz_dpi,
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const S32 components, BOOL is_fallback);
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S32 renderUTF8(const std::string &text, const S32 begin_offset,
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S32 x, S32 y,
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const LLColor4 &color) const
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{
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return renderUTF8(text, begin_offset, (F32)x, (F32)y, color,
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LEFT, BASELINE, NORMAL,
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S32_MAX, S32_MAX, NULL, FALSE);
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}
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S32 renderUTF8(const std::string &text, const S32 begin_offset,
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S32 x, S32 y,
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const LLColor4 &color,
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HAlign halign, VAlign valign, U8 style = NORMAL) const
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{
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return renderUTF8(text, begin_offset, (F32)x, (F32)y, color,
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halign, valign, style,
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S32_MAX, S32_MAX, NULL, FALSE);
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}
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// renderUTF8 does a conversion, so is slower!
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S32 renderUTF8(const std::string &text,
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S32 begin_offset,
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F32 x, F32 y,
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const LLColor4 &color,
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HAlign halign,
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VAlign valign,
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U8 style,
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S32 max_chars,
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S32 max_pixels,
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F32* right_x,
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BOOL use_ellipses) const;
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S32 render(const LLWString &text, const S32 begin_offset,
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F32 x, F32 y,
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const LLColor4 &color) const
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{
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return render(text, begin_offset, x, y, color,
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LEFT, BASELINE, NORMAL,
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S32_MAX, S32_MAX, NULL, FALSE, FALSE);
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}
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S32 render(const LLWString &text,
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S32 begin_offset,
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F32 x, F32 y,
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const LLColor4 &color,
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HAlign halign = LEFT,
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VAlign valign = BASELINE,
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U8 style = NORMAL,
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S32 max_chars = S32_MAX,
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S32 max_pixels = S32_MAX,
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F32* right_x=NULL,
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BOOL use_embedded = FALSE,
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BOOL use_ellipses = FALSE) const;
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// font metrics - override for LLFont that returns units of virtual pixels
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/*virtual*/ F32 getLineHeight() const { return (F32)llround(mLineHeight / sScaleY); }
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/*virtual*/ F32 getAscenderHeight() const { return (F32)llround(mAscender / sScaleY); }
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/*virtual*/ F32 getDescenderHeight() const { return (F32)llround(mDescender / sScaleY); }
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virtual S32 getWidth(const std::string& utf8text) const;
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virtual S32 getWidth(const llwchar* wchars) const;
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virtual S32 getWidth(const std::string& utf8text, const S32 offset, const S32 max_chars ) const;
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virtual S32 getWidth(const llwchar* wchars, const S32 offset, const S32 max_chars, BOOL use_embedded = FALSE) const;
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virtual F32 getWidthF32(const std::string& utf8text) const;
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virtual F32 getWidthF32(const llwchar* wchars) const;
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virtual F32 getWidthF32(const std::string& text, const S32 offset, const S32 max_chars ) const;
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virtual F32 getWidthF32(const llwchar* wchars, const S32 offset, const S32 max_chars, BOOL use_embedded = FALSE ) const;
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// The following are called often, frequently with large buffers, so do not use a string interface
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// Returns the max number of complete characters from text (up to max_chars) that can be drawn in max_pixels
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virtual S32 maxDrawableChars(const llwchar* wchars, F32 max_pixels, S32 max_chars = S32_MAX,
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BOOL end_on_word_boundary = FALSE, const BOOL use_embedded = FALSE,
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F32* drawn_pixels = NULL) const;
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// Returns the index of the first complete characters from text that can be drawn in max_pixels
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// given that the character at start_pos should be the last character (or as close to last as possible).
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virtual S32 firstDrawableChar(const llwchar* wchars, F32 max_pixels, S32 text_len, S32 start_pos=S32_MAX, S32 max_chars = S32_MAX) const;
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// Returns the index of the character closest to pixel position x (ignoring text to the right of max_pixels and max_chars)
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virtual S32 charFromPixelOffset(const llwchar* wchars, const S32 char_offset,
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F32 x, F32 max_pixels=F32_MAX, S32 max_chars = S32_MAX,
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BOOL round = TRUE, BOOL use_embedded = FALSE) const;
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LLTexture *getTexture() const;
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void addEmbeddedChar( llwchar wc, LLTexture* image, const std::string& label) const;
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void addEmbeddedChar( llwchar wc, LLTexture* image, const LLWString& label) const;
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void removeEmbeddedChar( llwchar wc ) const;
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static std::string nameFromFont(const LLFontGL* fontp);
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static std::string nameFromHAlign(LLFontGL::HAlign align);
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static LLFontGL::HAlign hAlignFromName(const std::string& name);
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static std::string nameFromVAlign(LLFontGL::VAlign align);
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static LLFontGL::VAlign vAlignFromName(const std::string& name);
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static void setFontDisplay(BOOL flag) { sDisplayFont = flag ; }
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protected:
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struct embedded_data_t
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{
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embedded_data_t(LLImageGL* image, const LLWString& label) : mImage(image), mLabel(label) {}
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LLPointer<LLImageGL> mImage;
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LLWString mLabel;
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};
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const embedded_data_t* getEmbeddedCharData(const llwchar wch) const;
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F32 getEmbeddedCharAdvance(const embedded_data_t* ext_data) const;
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void clearEmbeddedChars();
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void renderQuad(const LLRectf& screen_rect, const LLRectf& uv_rect, F32 slant_amt) const;
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void drawGlyph(const LLRectf& screen_rect, const LLRectf& uv_rect, const LLColor4& color, U8 style, F32 drop_shadow_fade) const;
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public:
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static F32 sVertDPI;
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static F32 sHorizDPI;
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static F32 sScaleX;
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static F32 sScaleY;
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static BOOL sDisplayFont ;
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static std::string sAppDir; // For loading fonts
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static LLFontGL* getFontMonospace();
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static LLFontGL* getFontSansSerifSmall();
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static LLFontGL* getFontSansSerif();
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static LLFontGL* getFontSansSerifBig();
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static LLFontGL* getFontSansSerifHuge();
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static LLFontGL* getFontSansSerifBold();
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static LLFontGL* getFontExtChar();
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static LLFontGL* getFont(const LLFontDescriptor& desc);
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static LLColor4 sShadowColor;
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friend class LLTextBillboard;
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friend class LLHUDText;
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protected:
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/*virtual*/ BOOL addChar(const llwchar wch) const;
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protected:
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typedef std::map<llwchar,embedded_data_t*> embedded_map_t;
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mutable embedded_map_t mEmbeddedChars;
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LLFontDescriptor mFontDesc;
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// Registry holds all instantiated fonts.
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static LLFontRegistry* sFontRegistry;
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public:
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static std::string getFontPathLocal();
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static std::string getFontPathSystem();
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static LLCoordFont sCurOrigin;
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static std::vector<LLCoordFont> sOriginStack;
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const LLFontDescriptor &getFontDesc() const { return mFontDesc; }
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void setFontDesc(const LLFontDescriptor& font_desc) { mFontDesc = font_desc; }
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};
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#endif
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