6c02e359bd
This commit pulls more changes that was not included in #1088.
1732 lines
46 KiB
C
1732 lines
46 KiB
C
//
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// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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//
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#ifndef FONS_H
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#define FONS_H
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#define FONS_INVALID -1
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enum FONSflags {
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FONS_ZERO_TOPLEFT = 1,
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FONS_ZERO_BOTTOMLEFT = 2,
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};
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enum FONSalign {
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// Horizontal align
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FONS_ALIGN_LEFT = 1<<0, // Default
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FONS_ALIGN_CENTER = 1<<1,
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FONS_ALIGN_RIGHT = 1<<2,
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// Vertical align
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FONS_ALIGN_TOP = 1<<3,
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FONS_ALIGN_MIDDLE = 1<<4,
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FONS_ALIGN_BOTTOM = 1<<5,
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FONS_ALIGN_BASELINE = 1<<6, // Default
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};
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enum FONSerrorCode {
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// Font atlas is full.
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FONS_ATLAS_FULL = 1,
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// Scratch memory used to render glyphs is full, requested size reported in 'val', you may need to bump up FONS_SCRATCH_BUF_SIZE.
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FONS_SCRATCH_FULL = 2,
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// Calls to fonsPushState has created too large stack, if you need deep state stack bump up FONS_MAX_STATES.
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FONS_STATES_OVERFLOW = 3,
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// Trying to pop too many states fonsPopState().
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FONS_STATES_UNDERFLOW = 4,
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};
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struct FONSparams {
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int width, height;
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unsigned char flags;
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void* userPtr;
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int (*renderCreate)(void* uptr, int width, int height);
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int (*renderResize)(void* uptr, int width, int height);
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void (*renderUpdate)(void* uptr, int* rect, const unsigned char* data);
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void (*renderDraw)(void* uptr, const float* verts, const float* tcoords, const unsigned int* colors, int nverts);
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void (*renderDelete)(void* uptr);
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};
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typedef struct FONSparams FONSparams;
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struct FONSquad
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{
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float x0,y0,s0,t0;
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float x1,y1,s1,t1;
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};
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typedef struct FONSquad FONSquad;
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struct FONStextIter {
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float x, y, nextx, nexty, scale, spacing;
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unsigned int codepoint;
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short isize, iblur;
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struct FONSfont* font;
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int prevGlyphIndex;
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const char* str;
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const char* next;
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const char* end;
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unsigned int utf8state;
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};
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typedef struct FONStextIter FONStextIter;
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typedef struct FONScontext FONScontext;
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// Constructor and destructor.
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FONScontext* fonsCreateInternal(FONSparams* params);
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void fonsDeleteInternal(FONScontext* s);
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void fonsSetErrorCallback(FONScontext* s, void (*callback)(void* uptr, int error, int val), void* uptr);
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// Returns current atlas size.
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void fonsGetAtlasSize(FONScontext* s, int* width, int* height);
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// Expands the atlas size.
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int fonsExpandAtlas(FONScontext* s, int width, int height);
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// Resets the whole stash.
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int fonsResetAtlas(FONScontext* stash, int width, int height);
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// Add fonts
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int fonsAddFont(FONScontext* s, const char* name, const char* path);
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int fonsAddFontMem(FONScontext* s, const char* name, unsigned char* data, int ndata, int freeData);
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int fonsGetFontByName(FONScontext* s, const char* name);
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// State handling
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void fonsPushState(FONScontext* s);
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void fonsPopState(FONScontext* s);
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void fonsClearState(FONScontext* s);
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// State setting
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void fonsSetSize(FONScontext* s, float size);
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void fonsSetColor(FONScontext* s, unsigned int color);
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void fonsSetSpacing(FONScontext* s, float spacing);
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void fonsSetBlur(FONScontext* s, float blur);
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void fonsSetAlign(FONScontext* s, int align);
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void fonsSetFont(FONScontext* s, int font);
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// Draw text
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float fonsDrawText(FONScontext* s, float x, float y, const char* string, const char* end);
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// Measure text
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float fonsTextBounds(FONScontext* s, float x, float y, const char* string, const char* end, float* bounds);
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void fonsLineBounds(FONScontext* s, float y, float* miny, float* maxy);
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void fonsVertMetrics(FONScontext* s, float* ascender, float* descender, float* lineh);
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// Text iterator
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int fonsTextIterInit(FONScontext* stash, FONStextIter* iter, float x, float y, const char* str, const char* end);
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int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, struct FONSquad* quad);
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// Pull texture changes
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const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height);
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int fonsValidateTexture(FONScontext* s, int* dirty);
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// Draws the stash texture for debugging
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void fonsDrawDebug(FONScontext* s, float x, float y);
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#endif // FONTSTASH_H
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#ifdef FONTSTASH_IMPLEMENTATION
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#define FONS_NOTUSED(v) BX_UNUSED(v)
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#ifdef FONS_USE_FREETYPE
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_ADVANCES_H
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#include <math.h>
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struct FONSttFontImpl {
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FT_Face font;
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};
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typedef struct FONSttFontImpl FONSttFontImpl;
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static FT_Library ftLibrary;
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int fons__tt_init(FONScontext *context)
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{
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FT_Error ftError;
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FONS_NOTUSED(context);
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ftError = FT_Init_FreeType(&ftLibrary);
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return ftError == 0;
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}
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int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize)
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{
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FT_Error ftError;
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FONS_NOTUSED(context);
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//font->font.userdata = stash;
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ftError = FT_New_Memory_Face(ftLibrary, (const FT_Byte*)data, dataSize, 0, &font->font);
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return ftError == 0;
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}
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void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap)
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{
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*ascent = font->font->ascender;
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*descent = font->font->descender;
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*lineGap = font->font->height - (*ascent - *descent);
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}
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float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size)
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{
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return size / (font->font->ascender - font->font->descender);
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}
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int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint)
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{
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return FT_Get_Char_Index(font->font, codepoint);
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}
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int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale,
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int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1)
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{
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FT_Error ftError;
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FT_GlyphSlot ftGlyph;
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FT_Fixed advFixed;
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FONS_NOTUSED(scale);
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ftError = FT_Set_Pixel_Sizes(font->font, 0, (FT_UInt)(size * (float)font->font->units_per_EM / (float)(font->font->ascender - font->font->descender)));
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if (ftError) return 0;
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ftError = FT_Load_Glyph(font->font, glyph, FT_LOAD_RENDER);
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if (ftError) return 0;
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ftError = FT_Get_Advance(font->font, glyph, FT_LOAD_NO_SCALE, &advFixed);
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if (ftError) return 0;
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ftGlyph = font->font->glyph;
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*advance = (int)advFixed;
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*lsb = (int)ftGlyph->metrics.horiBearingX;
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*x0 = ftGlyph->bitmap_left;
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*x1 = *x0 + ftGlyph->bitmap.width;
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*y0 = -ftGlyph->bitmap_top;
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*y1 = *y0 + ftGlyph->bitmap.rows;
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return 1;
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}
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void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride,
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float scaleX, float scaleY, int glyph)
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{
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FT_GlyphSlot ftGlyph = font->font->glyph;
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int ftGlyphOffset = 0;
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int x, y;
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FONS_NOTUSED(outWidth);
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FONS_NOTUSED(outHeight);
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FONS_NOTUSED(scaleX);
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FONS_NOTUSED(scaleY);
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FONS_NOTUSED(glyph); // glyph has already been loaded by fons__tt_buildGlyphBitmap
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for ( y = 0; y < ftGlyph->bitmap.rows; y++ ) {
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for ( x = 0; x < ftGlyph->bitmap.width; x++ ) {
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output[(y * outStride) + x] = ftGlyph->bitmap.buffer[ftGlyphOffset++];
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}
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}
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}
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int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2)
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{
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FT_Vector ftKerning;
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FT_Get_Kerning(font->font, glyph1, glyph2, FT_KERNING_DEFAULT, &ftKerning);
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return (int)((ftKerning.x + 32) >> 6); // Round up and convert to integer
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}
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#else
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#if 0
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#define STB_TRUETYPE_IMPLEMENTATION
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# define STBTT_malloc(x,u) fons__tmpalloc(x,u)
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# define STBTT_free(x,u) fons__tmpfree(x,u)
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static void* fons__tmpalloc(size_t size, void* up);
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static void fons__tmpfree(void* ptr, void* up);
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#else
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# include <malloc.h>
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# include <string.h>
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#endif // 0
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#define STBTT_DEF extern
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#include <stb/stb_truetype.h>
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struct FONSttFontImpl {
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stbtt_fontinfo font;
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};
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typedef struct FONSttFontImpl FONSttFontImpl;
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int fons__tt_init(FONScontext *context)
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{
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FONS_NOTUSED(context);
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return 1;
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}
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int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize)
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{
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int stbError;
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FONS_NOTUSED(dataSize);
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font->font.userdata = context;
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stbError = stbtt_InitFont(&font->font, data, 0);
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return stbError;
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}
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void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap)
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{
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stbtt_GetFontVMetrics(&font->font, ascent, descent, lineGap);
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}
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float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size)
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{
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return stbtt_ScaleForPixelHeight(&font->font, size);
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}
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int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint)
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{
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return stbtt_FindGlyphIndex(&font->font, codepoint);
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}
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int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale,
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int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1)
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{
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FONS_NOTUSED(size);
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stbtt_GetGlyphHMetrics(&font->font, glyph, advance, lsb);
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stbtt_GetGlyphBitmapBox(&font->font, glyph, scale, scale, x0, y0, x1, y1);
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return 1;
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}
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void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride,
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float scaleX, float scaleY, int glyph)
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{
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stbtt_MakeGlyphBitmap(&font->font, output, outWidth, outHeight, outStride, scaleX, scaleY, glyph);
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}
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int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2)
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{
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return stbtt_GetGlyphKernAdvance(&font->font, glyph1, glyph2);
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}
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#endif
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#ifndef FONS_SCRATCH_BUF_SIZE
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# define FONS_SCRATCH_BUF_SIZE 64000
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#endif
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#ifndef FONS_HASH_LUT_SIZE
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# define FONS_HASH_LUT_SIZE 256
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#endif
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#ifndef FONS_INIT_FONTS
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# define FONS_INIT_FONTS 4
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#endif
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#ifndef FONS_INIT_GLYPHS
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# define FONS_INIT_GLYPHS 256
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#endif
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#ifndef FONS_INIT_ATLAS_NODES
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# define FONS_INIT_ATLAS_NODES 256
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#endif
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#ifndef FONS_VERTEX_COUNT
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# define FONS_VERTEX_COUNT 1024
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#endif
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#ifndef FONS_MAX_STATES
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# define FONS_MAX_STATES 20
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#endif
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#ifndef FONS_MAX_FALLBACKS
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# define FONS_MAX_FALLBACKS 20
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#endif
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static unsigned int fons__hashint(unsigned int a)
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{
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a += ~(a<<15);
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a ^= (a>>10);
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a += (a<<3);
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a ^= (a>>6);
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a += ~(a<<11);
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a ^= (a>>16);
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return a;
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}
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static int fons__mini(int a, int b)
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{
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return a < b ? a : b;
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}
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static int fons__maxi(int a, int b)
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{
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return a > b ? a : b;
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}
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struct FONSglyph
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{
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unsigned int codepoint;
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int index;
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int next;
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short size, blur;
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short x0,y0,x1,y1;
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short xadv,xoff,yoff;
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};
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typedef struct FONSglyph FONSglyph;
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struct FONSfont
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{
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FONSttFontImpl font;
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char name[64];
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unsigned char* data;
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int dataSize;
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unsigned char freeData;
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float ascender;
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float descender;
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float lineh;
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FONSglyph* glyphs;
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int cglyphs;
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int nglyphs;
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int lut[FONS_HASH_LUT_SIZE];
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int fallbacks[FONS_MAX_FALLBACKS];
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int nfallbacks;
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};
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typedef struct FONSfont FONSfont;
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struct FONSstate
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{
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int font;
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int align;
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float size;
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unsigned int color;
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float blur;
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float spacing;
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};
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typedef struct FONSstate FONSstate;
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struct FONSatlasNode {
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short x, y, width;
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};
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typedef struct FONSatlasNode FONSatlasNode;
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struct FONSatlas
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{
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int width, height;
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FONSatlasNode* nodes;
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int nnodes;
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int cnodes;
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};
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typedef struct FONSatlas FONSatlas;
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struct FONScontext
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{
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FONSparams params;
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float itw,ith;
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unsigned char* texData;
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int dirtyRect[4];
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FONSfont** fonts;
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FONSatlas* atlas;
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int cfonts;
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int nfonts;
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float verts[FONS_VERTEX_COUNT*2];
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float tcoords[FONS_VERTEX_COUNT*2];
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unsigned int colors[FONS_VERTEX_COUNT];
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int nverts;
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unsigned char* scratch;
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int nscratch;
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FONSstate states[FONS_MAX_STATES];
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int nstates;
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void (*handleError)(void* uptr, int error, int val);
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void* errorUptr;
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};
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#if 0 // defined(STB_TRUETYPE_IMPLEMENTATION)
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static void* fons__tmpalloc(size_t size, void* up)
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{
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unsigned char* ptr;
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FONScontext* stash = (FONScontext*)up;
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// 16-byte align the returned pointer
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size = (size + 0xf) & ~0xf;
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if (stash->nscratch+(int)size > FONS_SCRATCH_BUF_SIZE) {
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if (stash->handleError)
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stash->handleError(stash->errorUptr, FONS_SCRATCH_FULL, stash->nscratch+(int)size);
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return NULL;
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}
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ptr = stash->scratch + stash->nscratch;
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stash->nscratch += (int)size;
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return ptr;
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}
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static void fons__tmpfree(void* ptr, void* up)
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{
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(void)ptr;
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(void)up;
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// empty
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}
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#endif // STB_TRUETYPE_IMPLEMENTATION
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// Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de>
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// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
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#define FONS_UTF8_ACCEPT 0
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#define FONS_UTF8_REJECT 12
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static unsigned int fons__decutf8(unsigned int* state, unsigned int* codep, unsigned int byte)
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{
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static const unsigned char utf8d[] = {
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// The first part of the table maps bytes to character classes that
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// to reduce the size of the transition table and create bitmasks.
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
|
|
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
|
|
10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
|
|
|
|
// The second part is a transition table that maps a combination
|
|
// of a state of the automaton and a character class to a state.
|
|
0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
|
|
12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
|
|
12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
|
|
12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
|
|
12,36,12,12,12,12,12,12,12,12,12,12,
|
|
};
|
|
|
|
unsigned int type = utf8d[byte];
|
|
|
|
*codep = (*state != FONS_UTF8_ACCEPT) ?
|
|
(byte & 0x3fu) | (*codep << 6) :
|
|
(0xff >> type) & (byte);
|
|
|
|
*state = utf8d[256 + *state + type];
|
|
return *state;
|
|
}
|
|
|
|
// Atlas based on Skyline Bin Packer by Jukka Jylänki
|
|
|
|
static void fons__deleteAtlas(FONSatlas* atlas)
|
|
{
|
|
if (atlas == NULL) return;
|
|
if (atlas->nodes != NULL) free(atlas->nodes);
|
|
free(atlas);
|
|
}
|
|
|
|
static FONSatlas* fons__allocAtlas(int w, int h, int nnodes)
|
|
{
|
|
FONSatlas* atlas = NULL;
|
|
|
|
// Allocate memory for the font stash.
|
|
atlas = (FONSatlas*)malloc(sizeof(FONSatlas));
|
|
if (atlas == NULL) goto error;
|
|
memset(atlas, 0, sizeof(FONSatlas));
|
|
|
|
atlas->width = w;
|
|
atlas->height = h;
|
|
|
|
// Allocate space for skyline nodes
|
|
atlas->nodes = (FONSatlasNode*)malloc(sizeof(FONSatlasNode) * nnodes);
|
|
if (atlas->nodes == NULL) goto error;
|
|
memset(atlas->nodes, 0, sizeof(FONSatlasNode) * nnodes);
|
|
atlas->nnodes = 0;
|
|
atlas->cnodes = nnodes;
|
|
|
|
// Init root node.
|
|
atlas->nodes[0].x = 0;
|
|
atlas->nodes[0].y = 0;
|
|
atlas->nodes[0].width = (short)w;
|
|
atlas->nnodes++;
|
|
|
|
return atlas;
|
|
|
|
error:
|
|
if (atlas) fons__deleteAtlas(atlas);
|
|
return NULL;
|
|
}
|
|
|
|
static int fons__atlasInsertNode(FONSatlas* atlas, int idx, int x, int y, int w)
|
|
{
|
|
int i;
|
|
// Insert node
|
|
if (atlas->nnodes+1 > atlas->cnodes) {
|
|
atlas->cnodes = atlas->cnodes == 0 ? 8 : atlas->cnodes * 2;
|
|
atlas->nodes = (FONSatlasNode*)realloc(atlas->nodes, sizeof(FONSatlasNode) * atlas->cnodes);
|
|
if (atlas->nodes == NULL)
|
|
return 0;
|
|
}
|
|
for (i = atlas->nnodes; i > idx; i--)
|
|
atlas->nodes[i] = atlas->nodes[i-1];
|
|
atlas->nodes[idx].x = (short)x;
|
|
atlas->nodes[idx].y = (short)y;
|
|
atlas->nodes[idx].width = (short)w;
|
|
atlas->nnodes++;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void fons__atlasRemoveNode(FONSatlas* atlas, int idx)
|
|
{
|
|
int i;
|
|
if (atlas->nnodes == 0) return;
|
|
for (i = idx; i < atlas->nnodes-1; i++)
|
|
atlas->nodes[i] = atlas->nodes[i+1];
|
|
atlas->nnodes--;
|
|
}
|
|
|
|
static void fons__atlasExpand(FONSatlas* atlas, int w, int h)
|
|
{
|
|
// Insert node for empty space
|
|
if (w > atlas->width)
|
|
fons__atlasInsertNode(atlas, atlas->nnodes, atlas->width, 0, w - atlas->width);
|
|
atlas->width = w;
|
|
atlas->height = h;
|
|
}
|
|
|
|
static void fons__atlasReset(FONSatlas* atlas, int w, int h)
|
|
{
|
|
atlas->width = w;
|
|
atlas->height = h;
|
|
atlas->nnodes = 0;
|
|
|
|
// Init root node.
|
|
atlas->nodes[0].x = 0;
|
|
atlas->nodes[0].y = 0;
|
|
atlas->nodes[0].width = (short)w;
|
|
atlas->nnodes++;
|
|
}
|
|
|
|
static int fons__atlasAddSkylineLevel(FONSatlas* atlas, int idx, int x, int y, int w, int h)
|
|
{
|
|
int i;
|
|
|
|
// Insert new node
|
|
if (fons__atlasInsertNode(atlas, idx, x, y+h, w) == 0)
|
|
return 0;
|
|
|
|
// Delete skyline segments that fall under the shadow of the new segment.
|
|
for (i = idx+1; i < atlas->nnodes; i++) {
|
|
if (atlas->nodes[i].x < atlas->nodes[i-1].x + atlas->nodes[i-1].width) {
|
|
int shrink = atlas->nodes[i-1].x + atlas->nodes[i-1].width - atlas->nodes[i].x;
|
|
atlas->nodes[i].x += (short)shrink;
|
|
atlas->nodes[i].width -= (short)shrink;
|
|
if (atlas->nodes[i].width <= 0) {
|
|
fons__atlasRemoveNode(atlas, i);
|
|
i--;
|
|
} else {
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Merge same height skyline segments that are next to each other.
|
|
for (i = 0; i < atlas->nnodes-1; i++) {
|
|
if (atlas->nodes[i].y == atlas->nodes[i+1].y) {
|
|
atlas->nodes[i].width += atlas->nodes[i+1].width;
|
|
fons__atlasRemoveNode(atlas, i+1);
|
|
i--;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int fons__atlasRectFits(FONSatlas* atlas, int i, int w, int h)
|
|
{
|
|
// Checks if there is enough space at the location of skyline span 'i',
|
|
// and return the max height of all skyline spans under that at that location,
|
|
// (think tetris block being dropped at that position). Or -1 if no space found.
|
|
int x = atlas->nodes[i].x;
|
|
int y = atlas->nodes[i].y;
|
|
int spaceLeft;
|
|
if (x + w > atlas->width)
|
|
return -1;
|
|
spaceLeft = w;
|
|
while (spaceLeft > 0) {
|
|
if (i == atlas->nnodes) return -1;
|
|
y = fons__maxi(y, atlas->nodes[i].y);
|
|
if (y + h > atlas->height) return -1;
|
|
spaceLeft -= atlas->nodes[i].width;
|
|
++i;
|
|
}
|
|
return y;
|
|
}
|
|
|
|
static int fons__atlasAddRect(FONSatlas* atlas, int rw, int rh, int* rx, int* ry)
|
|
{
|
|
int besth = atlas->height, bestw = atlas->width, besti = -1;
|
|
int bestx = -1, besty = -1, i;
|
|
|
|
// Bottom left fit heuristic.
|
|
for (i = 0; i < atlas->nnodes; i++) {
|
|
int y = fons__atlasRectFits(atlas, i, rw, rh);
|
|
if (y != -1) {
|
|
if (y + rh < besth || (y + rh == besth && atlas->nodes[i].width < bestw)) {
|
|
besti = i;
|
|
bestw = atlas->nodes[i].width;
|
|
besth = y + rh;
|
|
bestx = atlas->nodes[i].x;
|
|
besty = y;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (besti == -1)
|
|
return 0;
|
|
|
|
// Perform the actual packing.
|
|
if (fons__atlasAddSkylineLevel(atlas, besti, bestx, besty, rw, rh) == 0)
|
|
return 0;
|
|
|
|
*rx = bestx;
|
|
*ry = besty;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void fons__addWhiteRect(FONScontext* stash, int w, int h)
|
|
{
|
|
int x, y, gx, gy;
|
|
unsigned char* dst;
|
|
if (fons__atlasAddRect(stash->atlas, w, h, &gx, &gy) == 0)
|
|
return;
|
|
|
|
// Rasterize
|
|
dst = &stash->texData[gx + gy * stash->params.width];
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++)
|
|
dst[x] = 0xff;
|
|
dst += stash->params.width;
|
|
}
|
|
|
|
stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], gx);
|
|
stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], gy);
|
|
stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], gx+w);
|
|
stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], gy+h);
|
|
}
|
|
|
|
FONScontext* fonsCreateInternal(FONSparams* params)
|
|
{
|
|
FONScontext* stash = NULL;
|
|
|
|
// Allocate memory for the font stash.
|
|
stash = (FONScontext*)malloc(sizeof(FONScontext));
|
|
if (stash == NULL) goto error;
|
|
memset(stash, 0, sizeof(FONScontext));
|
|
|
|
stash->params = *params;
|
|
|
|
// Allocate scratch buffer.
|
|
stash->scratch = (unsigned char*)malloc(FONS_SCRATCH_BUF_SIZE);
|
|
if (stash->scratch == NULL) goto error;
|
|
|
|
// Initialize implementation library
|
|
if (!fons__tt_init(stash)) goto error;
|
|
|
|
if (stash->params.renderCreate != NULL) {
|
|
if (stash->params.renderCreate(stash->params.userPtr, stash->params.width, stash->params.height) == 0)
|
|
goto error;
|
|
}
|
|
|
|
stash->atlas = fons__allocAtlas(stash->params.width, stash->params.height, FONS_INIT_ATLAS_NODES);
|
|
if (stash->atlas == NULL) goto error;
|
|
|
|
// Allocate space for fonts.
|
|
stash->fonts = (FONSfont**)malloc(sizeof(FONSfont*) * FONS_INIT_FONTS);
|
|
if (stash->fonts == NULL) goto error;
|
|
memset(stash->fonts, 0, sizeof(FONSfont*) * FONS_INIT_FONTS);
|
|
stash->cfonts = FONS_INIT_FONTS;
|
|
stash->nfonts = 0;
|
|
|
|
// Create texture for the cache.
|
|
stash->itw = 1.0f/stash->params.width;
|
|
stash->ith = 1.0f/stash->params.height;
|
|
stash->texData = (unsigned char*)malloc(stash->params.width * stash->params.height);
|
|
if (stash->texData == NULL) goto error;
|
|
memset(stash->texData, 0, stash->params.width * stash->params.height);
|
|
|
|
stash->dirtyRect[0] = stash->params.width;
|
|
stash->dirtyRect[1] = stash->params.height;
|
|
stash->dirtyRect[2] = 0;
|
|
stash->dirtyRect[3] = 0;
|
|
|
|
// Add white rect at 0,0 for debug drawing.
|
|
fons__addWhiteRect(stash, 2,2);
|
|
|
|
fonsPushState(stash);
|
|
fonsClearState(stash);
|
|
|
|
return stash;
|
|
|
|
error:
|
|
fonsDeleteInternal(stash);
|
|
return NULL;
|
|
}
|
|
|
|
static FONSstate* fons__getState(FONScontext* stash)
|
|
{
|
|
return &stash->states[stash->nstates-1];
|
|
}
|
|
|
|
int fonsAddFallbackFont(FONScontext* stash, int base, int fallback)
|
|
{
|
|
FONSfont* baseFont = stash->fonts[base];
|
|
if (baseFont->nfallbacks < FONS_MAX_FALLBACKS) {
|
|
baseFont->fallbacks[baseFont->nfallbacks++] = fallback;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void fonsSetSize(FONScontext* stash, float size)
|
|
{
|
|
fons__getState(stash)->size = size;
|
|
}
|
|
|
|
void fonsSetColor(FONScontext* stash, unsigned int color)
|
|
{
|
|
fons__getState(stash)->color = color;
|
|
}
|
|
|
|
void fonsSetSpacing(FONScontext* stash, float spacing)
|
|
{
|
|
fons__getState(stash)->spacing = spacing;
|
|
}
|
|
|
|
void fonsSetBlur(FONScontext* stash, float blur)
|
|
{
|
|
fons__getState(stash)->blur = blur;
|
|
}
|
|
|
|
void fonsSetAlign(FONScontext* stash, int align)
|
|
{
|
|
fons__getState(stash)->align = align;
|
|
}
|
|
|
|
void fonsSetFont(FONScontext* stash, int font)
|
|
{
|
|
fons__getState(stash)->font = font;
|
|
}
|
|
|
|
void fonsPushState(FONScontext* stash)
|
|
{
|
|
if (stash->nstates >= FONS_MAX_STATES) {
|
|
if (stash->handleError)
|
|
stash->handleError(stash->errorUptr, FONS_STATES_OVERFLOW, 0);
|
|
return;
|
|
}
|
|
if (stash->nstates > 0)
|
|
memcpy(&stash->states[stash->nstates], &stash->states[stash->nstates-1], sizeof(FONSstate));
|
|
stash->nstates++;
|
|
}
|
|
|
|
void fonsPopState(FONScontext* stash)
|
|
{
|
|
if (stash->nstates <= 1) {
|
|
if (stash->handleError)
|
|
stash->handleError(stash->errorUptr, FONS_STATES_UNDERFLOW, 0);
|
|
return;
|
|
}
|
|
stash->nstates--;
|
|
}
|
|
|
|
void fonsClearState(FONScontext* stash)
|
|
{
|
|
FONSstate* state = fons__getState(stash);
|
|
state->size = 12.0f;
|
|
state->color = 0xffffffff;
|
|
state->font = 0;
|
|
state->blur = 0;
|
|
state->spacing = 0;
|
|
state->align = FONS_ALIGN_LEFT | FONS_ALIGN_BASELINE;
|
|
}
|
|
|
|
static void fons__freeFont(FONSfont* font)
|
|
{
|
|
if (font == NULL) return;
|
|
if (font->glyphs) free(font->glyphs);
|
|
if (font->freeData && font->data) free(font->data);
|
|
free(font);
|
|
}
|
|
|
|
static int fons__allocFont(FONScontext* stash)
|
|
{
|
|
FONSfont* font = NULL;
|
|
if (stash->nfonts+1 > stash->cfonts) {
|
|
stash->cfonts = stash->cfonts == 0 ? 8 : stash->cfonts * 2;
|
|
stash->fonts = (FONSfont**)realloc(stash->fonts, sizeof(FONSfont*) * stash->cfonts);
|
|
if (stash->fonts == NULL)
|
|
return -1;
|
|
}
|
|
font = (FONSfont*)malloc(sizeof(FONSfont));
|
|
if (font == NULL) goto error;
|
|
memset(font, 0, sizeof(FONSfont));
|
|
|
|
font->glyphs = (FONSglyph*)malloc(sizeof(FONSglyph) * FONS_INIT_GLYPHS);
|
|
if (font->glyphs == NULL) goto error;
|
|
font->cglyphs = FONS_INIT_GLYPHS;
|
|
font->nglyphs = 0;
|
|
|
|
stash->fonts[stash->nfonts++] = font;
|
|
return stash->nfonts-1;
|
|
|
|
error:
|
|
fons__freeFont(font);
|
|
|
|
return FONS_INVALID;
|
|
}
|
|
|
|
int fonsAddFont(FONScontext* stash, const char* name, const char* path)
|
|
{
|
|
FILE* fp = 0;
|
|
int dataSize = 0;
|
|
unsigned char* data = NULL;
|
|
|
|
// Read in the font data.
|
|
fp = fopen(path, "rb");
|
|
if (fp == NULL) goto error;
|
|
fseek(fp,0,SEEK_END);
|
|
dataSize = (int)ftell(fp);
|
|
fseek(fp,0,SEEK_SET);
|
|
data = (unsigned char*)malloc(dataSize);
|
|
if (data == NULL) goto error;
|
|
fread(data, 1, dataSize, fp);
|
|
fclose(fp);
|
|
fp = 0;
|
|
|
|
return fonsAddFontMem(stash, name, data, dataSize, 1);
|
|
|
|
error:
|
|
if (data) free(data);
|
|
if (fp) fclose(fp);
|
|
return FONS_INVALID;
|
|
}
|
|
|
|
int fonsAddFontMem(FONScontext* stash, const char* name, unsigned char* data, int dataSize, int freeData)
|
|
{
|
|
int i, ascent, descent, fh, lineGap;
|
|
FONSfont* font;
|
|
|
|
int idx = fons__allocFont(stash);
|
|
if (idx == FONS_INVALID)
|
|
return FONS_INVALID;
|
|
|
|
font = stash->fonts[idx];
|
|
|
|
strncpy(font->name, name, sizeof(font->name));
|
|
font->name[sizeof(font->name)-1] = '\0';
|
|
|
|
// Init hash lookup.
|
|
for (i = 0; i < FONS_HASH_LUT_SIZE; ++i)
|
|
font->lut[i] = -1;
|
|
|
|
// Read in the font data.
|
|
font->dataSize = dataSize;
|
|
font->data = data;
|
|
font->freeData = (unsigned char)freeData;
|
|
|
|
// Init font
|
|
stash->nscratch = 0;
|
|
if (!fons__tt_loadFont(stash, &font->font, data, dataSize)) goto error;
|
|
|
|
// Store normalized line height. The real line height is got
|
|
// by multiplying the lineh by font size.
|
|
fons__tt_getFontVMetrics( &font->font, &ascent, &descent, &lineGap);
|
|
fh = ascent - descent;
|
|
font->ascender = (float)ascent / (float)fh;
|
|
font->descender = (float)descent / (float)fh;
|
|
font->lineh = (float)(fh + lineGap) / (float)fh;
|
|
|
|
return idx;
|
|
|
|
error:
|
|
fons__freeFont(font);
|
|
stash->nfonts--;
|
|
return FONS_INVALID;
|
|
}
|
|
|
|
int fonsGetFontByName(FONScontext* s, const char* name)
|
|
{
|
|
int i;
|
|
for (i = 0; i < s->nfonts; i++) {
|
|
if (strcmp(s->fonts[i]->name, name) == 0)
|
|
return i;
|
|
}
|
|
return FONS_INVALID;
|
|
}
|
|
|
|
|
|
static FONSglyph* fons__allocGlyph(FONSfont* font)
|
|
{
|
|
if (font->nglyphs+1 > font->cglyphs) {
|
|
font->cglyphs = font->cglyphs == 0 ? 8 : font->cglyphs * 2;
|
|
font->glyphs = (FONSglyph*)realloc(font->glyphs, sizeof(FONSglyph) * font->cglyphs);
|
|
if (font->glyphs == NULL) return NULL;
|
|
}
|
|
font->nglyphs++;
|
|
return &font->glyphs[font->nglyphs-1];
|
|
}
|
|
|
|
|
|
// Based on Exponential blur, Jani Huhtanen, 2006
|
|
|
|
#define APREC 16
|
|
#define ZPREC 7
|
|
|
|
static void fons__blurCols(unsigned char* dst, int w, int h, int dstStride, int alpha)
|
|
{
|
|
int x, y;
|
|
for (y = 0; y < h; y++) {
|
|
int z = 0; // force zero border
|
|
for (x = 1; x < w; x++) {
|
|
z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC;
|
|
dst[x] = (unsigned char)(z >> ZPREC);
|
|
}
|
|
dst[w-1] = 0; // force zero border
|
|
z = 0;
|
|
for (x = w-2; x >= 0; x--) {
|
|
z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC;
|
|
dst[x] = (unsigned char)(z >> ZPREC);
|
|
}
|
|
dst[0] = 0; // force zero border
|
|
dst += dstStride;
|
|
}
|
|
}
|
|
|
|
static void fons__blurRows(unsigned char* dst, int w, int h, int dstStride, int alpha)
|
|
{
|
|
int x, y;
|
|
for (x = 0; x < w; x++) {
|
|
int z = 0; // force zero border
|
|
for (y = dstStride; y < h*dstStride; y += dstStride) {
|
|
z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC;
|
|
dst[y] = (unsigned char)(z >> ZPREC);
|
|
}
|
|
dst[(h-1)*dstStride] = 0; // force zero border
|
|
z = 0;
|
|
for (y = (h-2)*dstStride; y >= 0; y -= dstStride) {
|
|
z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC;
|
|
dst[y] = (unsigned char)(z >> ZPREC);
|
|
}
|
|
dst[0] = 0; // force zero border
|
|
dst++;
|
|
}
|
|
}
|
|
|
|
|
|
static void fons__blur(FONScontext* stash, unsigned char* dst, int w, int h, int dstStride, int blur)
|
|
{
|
|
int alpha;
|
|
float sigma;
|
|
(void)stash;
|
|
|
|
if (blur < 1)
|
|
return;
|
|
// Calculate the alpha such that 90% of the kernel is within the radius. (Kernel extends to infinity)
|
|
sigma = (float)blur * 0.57735f; // 1 / sqrt(3)
|
|
alpha = (int)((1<<APREC) * (1.0f - expf(-2.3f / (sigma+1.0f))));
|
|
fons__blurRows(dst, w, h, dstStride, alpha);
|
|
fons__blurCols(dst, w, h, dstStride, alpha);
|
|
fons__blurRows(dst, w, h, dstStride, alpha);
|
|
fons__blurCols(dst, w, h, dstStride, alpha);
|
|
// fons__blurrows(dst, w, h, dstStride, alpha);
|
|
// fons__blurcols(dst, w, h, dstStride, alpha);
|
|
}
|
|
|
|
static FONSglyph* fons__getGlyph(FONScontext* stash, FONSfont* font, unsigned int codepoint,
|
|
short isize, short iblur)
|
|
{
|
|
int i, g, advance, lsb, x0, y0, x1, y1, gw, gh, gx, gy, x, y;
|
|
float scale;
|
|
FONSglyph* glyph = NULL;
|
|
unsigned int h;
|
|
float size = isize/10.0f;
|
|
int pad, added;
|
|
unsigned char* bdst;
|
|
unsigned char* dst;
|
|
FONSfont* renderFont = font;
|
|
|
|
if (isize < 2) return NULL;
|
|
if (iblur > 20) iblur = 20;
|
|
pad = iblur+2;
|
|
|
|
// Reset allocator.
|
|
stash->nscratch = 0;
|
|
|
|
// Find code point and size.
|
|
h = fons__hashint(codepoint) & (FONS_HASH_LUT_SIZE-1);
|
|
i = font->lut[h];
|
|
while (i != -1) {
|
|
if (font->glyphs[i].codepoint == codepoint && font->glyphs[i].size == isize && font->glyphs[i].blur == iblur)
|
|
return &font->glyphs[i];
|
|
i = font->glyphs[i].next;
|
|
}
|
|
|
|
// Could not find glyph, create it.
|
|
g = fons__tt_getGlyphIndex(&font->font, codepoint);
|
|
// Try to find the glyph in fallback fonts.
|
|
if (g == 0) {
|
|
for (i = 0; i < font->nfallbacks; ++i) {
|
|
FONSfont* fallbackFont = stash->fonts[font->fallbacks[i]];
|
|
int fallbackIndex = fons__tt_getGlyphIndex(&fallbackFont->font, codepoint);
|
|
if (fallbackIndex != 0) {
|
|
g = fallbackIndex;
|
|
renderFont = fallbackFont;
|
|
break;
|
|
}
|
|
}
|
|
// It is possible that we did not find a fallback glyph.
|
|
// In that case the glyph index 'g' is 0, and we'll proceed below and cache empty glyph.
|
|
}
|
|
scale = fons__tt_getPixelHeightScale(&renderFont->font, size);
|
|
fons__tt_buildGlyphBitmap(&renderFont->font, g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1);
|
|
gw = x1-x0 + pad*2;
|
|
gh = y1-y0 + pad*2;
|
|
|
|
// Find free spot for the rect in the atlas
|
|
added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy);
|
|
if (added == 0 && stash->handleError != NULL) {
|
|
// Atlas is full, let the user to resize the atlas (or not), and try again.
|
|
stash->handleError(stash->errorUptr, FONS_ATLAS_FULL, 0);
|
|
added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy);
|
|
}
|
|
if (added == 0) return NULL;
|
|
|
|
// Init glyph.
|
|
glyph = fons__allocGlyph(font);
|
|
glyph->codepoint = codepoint;
|
|
glyph->size = isize;
|
|
glyph->blur = iblur;
|
|
glyph->index = g;
|
|
glyph->x0 = (short)gx;
|
|
glyph->y0 = (short)gy;
|
|
glyph->x1 = (short)(glyph->x0+gw);
|
|
glyph->y1 = (short)(glyph->y0+gh);
|
|
glyph->xadv = (short)(scale * advance * 10.0f);
|
|
glyph->xoff = (short)(x0 - pad);
|
|
glyph->yoff = (short)(y0 - pad);
|
|
glyph->next = 0;
|
|
|
|
// Insert char to hash lookup.
|
|
glyph->next = font->lut[h];
|
|
font->lut[h] = font->nglyphs-1;
|
|
|
|
// Rasterize
|
|
dst = &stash->texData[(glyph->x0+pad) + (glyph->y0+pad) * stash->params.width];
|
|
fons__tt_renderGlyphBitmap(&renderFont->font, dst, gw-pad*2,gh-pad*2, stash->params.width, scale,scale, g);
|
|
|
|
// Make sure there is one pixel empty border.
|
|
dst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
|
|
for (y = 0; y < gh; y++) {
|
|
dst[y*stash->params.width] = 0;
|
|
dst[gw-1 + y*stash->params.width] = 0;
|
|
}
|
|
for (x = 0; x < gw; x++) {
|
|
dst[x] = 0;
|
|
dst[x + (gh-1)*stash->params.width] = 0;
|
|
}
|
|
|
|
// Debug code to color the glyph background
|
|
/* unsigned char* fdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
|
|
for (y = 0; y < gh; y++) {
|
|
for (x = 0; x < gw; x++) {
|
|
int a = (int)fdst[x+y*stash->params.width] + 20;
|
|
if (a > 255) a = 255;
|
|
fdst[x+y*stash->params.width] = a;
|
|
}
|
|
}*/
|
|
|
|
// Blur
|
|
if (iblur > 0) {
|
|
stash->nscratch = 0;
|
|
bdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
|
|
fons__blur(stash, bdst, gw,gh, stash->params.width, iblur);
|
|
}
|
|
|
|
stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], glyph->x0);
|
|
stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], glyph->y0);
|
|
stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], glyph->x1);
|
|
stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], glyph->y1);
|
|
|
|
return glyph;
|
|
}
|
|
|
|
static void fons__getQuad(FONScontext* stash, FONSfont* font,
|
|
int prevGlyphIndex, FONSglyph* glyph,
|
|
float scale, float spacing, float* x, float* y, FONSquad* q)
|
|
{
|
|
float rx,ry,xoff,yoff,x0,y0,x1,y1;
|
|
|
|
if (prevGlyphIndex != -1) {
|
|
float adv = fons__tt_getGlyphKernAdvance(&font->font, prevGlyphIndex, glyph->index) * scale;
|
|
*x += (int)(adv + spacing + 0.5f);
|
|
}
|
|
|
|
// Each glyph has 2px border to allow good interpolation,
|
|
// one pixel to prevent leaking, and one to allow good interpolation for rendering.
|
|
// Inset the texture region by one pixel for correct interpolation.
|
|
xoff = (short)(glyph->xoff+1);
|
|
yoff = (short)(glyph->yoff+1);
|
|
x0 = (float)(glyph->x0+1);
|
|
y0 = (float)(glyph->y0+1);
|
|
x1 = (float)(glyph->x1-1);
|
|
y1 = (float)(glyph->y1-1);
|
|
|
|
if (stash->params.flags & FONS_ZERO_TOPLEFT) {
|
|
rx = (float)(int)(*x + xoff);
|
|
ry = (float)(int)(*y + yoff);
|
|
|
|
q->x0 = rx;
|
|
q->y0 = ry;
|
|
q->x1 = rx + x1 - x0;
|
|
q->y1 = ry + y1 - y0;
|
|
|
|
q->s0 = x0 * stash->itw;
|
|
q->t0 = y0 * stash->ith;
|
|
q->s1 = x1 * stash->itw;
|
|
q->t1 = y1 * stash->ith;
|
|
} else {
|
|
rx = (float)(int)(*x + xoff);
|
|
ry = (float)(int)(*y - yoff);
|
|
|
|
q->x0 = rx;
|
|
q->y0 = ry;
|
|
q->x1 = rx + x1 - x0;
|
|
q->y1 = ry - y1 + y0;
|
|
|
|
q->s0 = x0 * stash->itw;
|
|
q->t0 = y0 * stash->ith;
|
|
q->s1 = x1 * stash->itw;
|
|
q->t1 = y1 * stash->ith;
|
|
}
|
|
|
|
*x += (int)(glyph->xadv / 10.0f + 0.5f);
|
|
}
|
|
|
|
static void fons__flush(FONScontext* stash)
|
|
{
|
|
// Flush texture
|
|
if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) {
|
|
if (stash->params.renderUpdate != NULL)
|
|
stash->params.renderUpdate(stash->params.userPtr, stash->dirtyRect, stash->texData);
|
|
// Reset dirty rect
|
|
stash->dirtyRect[0] = stash->params.width;
|
|
stash->dirtyRect[1] = stash->params.height;
|
|
stash->dirtyRect[2] = 0;
|
|
stash->dirtyRect[3] = 0;
|
|
}
|
|
|
|
// Flush triangles
|
|
if (stash->nverts > 0) {
|
|
if (stash->params.renderDraw != NULL)
|
|
stash->params.renderDraw(stash->params.userPtr, stash->verts, stash->tcoords, stash->colors, stash->nverts);
|
|
stash->nverts = 0;
|
|
}
|
|
}
|
|
|
|
static __inline void fons__vertex(FONScontext* stash, float x, float y, float s, float t, unsigned int c)
|
|
{
|
|
stash->verts[stash->nverts*2+0] = x;
|
|
stash->verts[stash->nverts*2+1] = y;
|
|
stash->tcoords[stash->nverts*2+0] = s;
|
|
stash->tcoords[stash->nverts*2+1] = t;
|
|
stash->colors[stash->nverts] = c;
|
|
stash->nverts++;
|
|
}
|
|
|
|
static float fons__getVertAlign(FONScontext* stash, FONSfont* font, int align, short isize)
|
|
{
|
|
if (stash->params.flags & FONS_ZERO_TOPLEFT) {
|
|
if (align & FONS_ALIGN_TOP) {
|
|
return font->ascender * (float)isize/10.0f;
|
|
} else if (align & FONS_ALIGN_MIDDLE) {
|
|
return (font->ascender + font->descender) / 2.0f * (float)isize/10.0f;
|
|
} else if (align & FONS_ALIGN_BASELINE) {
|
|
return 0.0f;
|
|
} else if (align & FONS_ALIGN_BOTTOM) {
|
|
return font->descender * (float)isize/10.0f;
|
|
}
|
|
} else {
|
|
if (align & FONS_ALIGN_TOP) {
|
|
return -font->ascender * (float)isize/10.0f;
|
|
} else if (align & FONS_ALIGN_MIDDLE) {
|
|
return -(font->ascender + font->descender) / 2.0f * (float)isize/10.0f;
|
|
} else if (align & FONS_ALIGN_BASELINE) {
|
|
return 0.0f;
|
|
} else if (align & FONS_ALIGN_BOTTOM) {
|
|
return -font->descender * (float)isize/10.0f;
|
|
}
|
|
}
|
|
return 0.0;
|
|
}
|
|
|
|
float fonsDrawText(FONScontext* stash,
|
|
float x, float y,
|
|
const char* str, const char* end)
|
|
{
|
|
FONSstate* state = fons__getState(stash);
|
|
unsigned int codepoint;
|
|
unsigned int utf8state = 0;
|
|
FONSglyph* glyph = NULL;
|
|
FONSquad q;
|
|
int prevGlyphIndex = -1;
|
|
short isize = (short)(state->size*10.0f);
|
|
short iblur = (short)state->blur;
|
|
float scale;
|
|
FONSfont* font;
|
|
float width;
|
|
|
|
if (stash == NULL) return x;
|
|
if (state->font < 0 || state->font >= stash->nfonts) return x;
|
|
font = stash->fonts[state->font];
|
|
if (font->data == NULL) return x;
|
|
|
|
scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f);
|
|
|
|
if (end == NULL)
|
|
end = str + strlen(str);
|
|
|
|
// Align horizontally
|
|
if (state->align & FONS_ALIGN_LEFT) {
|
|
// empty
|
|
} else if (state->align & FONS_ALIGN_RIGHT) {
|
|
width = fonsTextBounds(stash, x,y, str, end, NULL);
|
|
x -= width;
|
|
} else if (state->align & FONS_ALIGN_CENTER) {
|
|
width = fonsTextBounds(stash, x,y, str, end, NULL);
|
|
x -= width * 0.5f;
|
|
}
|
|
// Align vertically.
|
|
y += fons__getVertAlign(stash, font, state->align, isize);
|
|
|
|
for (; str != end; ++str) {
|
|
if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str))
|
|
continue;
|
|
glyph = fons__getGlyph(stash, font, codepoint, isize, iblur);
|
|
if (glyph != NULL) {
|
|
fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q);
|
|
|
|
if (stash->nverts+6 > FONS_VERTEX_COUNT)
|
|
fons__flush(stash);
|
|
|
|
fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color);
|
|
fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color);
|
|
fons__vertex(stash, q.x1, q.y0, q.s1, q.t0, state->color);
|
|
|
|
fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color);
|
|
fons__vertex(stash, q.x0, q.y1, q.s0, q.t1, state->color);
|
|
fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color);
|
|
}
|
|
prevGlyphIndex = glyph != NULL ? glyph->index : -1;
|
|
}
|
|
fons__flush(stash);
|
|
|
|
return x;
|
|
}
|
|
|
|
int fonsTextIterInit(FONScontext* stash, FONStextIter* iter,
|
|
float x, float y, const char* str, const char* end)
|
|
{
|
|
FONSstate* state = fons__getState(stash);
|
|
float width;
|
|
|
|
memset(iter, 0, sizeof(*iter));
|
|
|
|
if (stash == NULL) return 0;
|
|
if (state->font < 0 || state->font >= stash->nfonts) return 0;
|
|
iter->font = stash->fonts[state->font];
|
|
if (iter->font->data == NULL) return 0;
|
|
|
|
iter->isize = (short)(state->size*10.0f);
|
|
iter->iblur = (short)state->blur;
|
|
iter->scale = fons__tt_getPixelHeightScale(&iter->font->font, (float)iter->isize/10.0f);
|
|
|
|
// Align horizontally
|
|
if (state->align & FONS_ALIGN_LEFT) {
|
|
// empty
|
|
} else if (state->align & FONS_ALIGN_RIGHT) {
|
|
width = fonsTextBounds(stash, x,y, str, end, NULL);
|
|
x -= width;
|
|
} else if (state->align & FONS_ALIGN_CENTER) {
|
|
width = fonsTextBounds(stash, x,y, str, end, NULL);
|
|
x -= width * 0.5f;
|
|
}
|
|
// Align vertically.
|
|
y += fons__getVertAlign(stash, iter->font, state->align, iter->isize);
|
|
|
|
if (end == NULL)
|
|
end = str + strlen(str);
|
|
|
|
iter->x = iter->nextx = x;
|
|
iter->y = iter->nexty = y;
|
|
iter->spacing = state->spacing;
|
|
iter->str = str;
|
|
iter->next = str;
|
|
iter->end = end;
|
|
iter->codepoint = 0;
|
|
iter->prevGlyphIndex = -1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, FONSquad* quad)
|
|
{
|
|
FONSglyph* glyph = NULL;
|
|
const char* str = iter->next;
|
|
iter->str = iter->next;
|
|
|
|
if (str == iter->end)
|
|
return 0;
|
|
|
|
for (; str != iter->end; str++) {
|
|
if (fons__decutf8(&iter->utf8state, &iter->codepoint, *(const unsigned char*)str))
|
|
continue;
|
|
str++;
|
|
// Get glyph and quad
|
|
iter->x = iter->nextx;
|
|
iter->y = iter->nexty;
|
|
glyph = fons__getGlyph(stash, iter->font, iter->codepoint, iter->isize, iter->iblur);
|
|
if (glyph != NULL)
|
|
fons__getQuad(stash, iter->font, iter->prevGlyphIndex, glyph, iter->scale, iter->spacing, &iter->nextx, &iter->nexty, quad);
|
|
iter->prevGlyphIndex = glyph != NULL ? glyph->index : -1;
|
|
break;
|
|
}
|
|
iter->next = str;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void fonsDrawDebug(FONScontext* stash, float x, float y)
|
|
{
|
|
int i;
|
|
int w = stash->params.width;
|
|
int h = stash->params.height;
|
|
float u = w == 0 ? 0 : (1.0f / w);
|
|
float v = h == 0 ? 0 : (1.0f / h);
|
|
|
|
if (stash->nverts+6+6 > FONS_VERTEX_COUNT)
|
|
fons__flush(stash);
|
|
|
|
// Draw background
|
|
fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff);
|
|
fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff);
|
|
fons__vertex(stash, x+w, y+0, u, v, 0x0fffffff);
|
|
|
|
fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff);
|
|
fons__vertex(stash, x+0, y+h, u, v, 0x0fffffff);
|
|
fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff);
|
|
|
|
// Draw texture
|
|
fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff);
|
|
fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff);
|
|
fons__vertex(stash, x+w, y+0, 1, 0, 0xffffffff);
|
|
|
|
fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff);
|
|
fons__vertex(stash, x+0, y+h, 0, 1, 0xffffffff);
|
|
fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff);
|
|
|
|
// Drawbug draw atlas
|
|
for (i = 0; i < stash->atlas->nnodes; i++) {
|
|
FONSatlasNode* n = &stash->atlas->nodes[i];
|
|
|
|
if (stash->nverts+6 > FONS_VERTEX_COUNT)
|
|
fons__flush(stash);
|
|
|
|
fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff);
|
|
fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff);
|
|
fons__vertex(stash, x+n->x+n->width, y+n->y+0, u, v, 0xc00000ff);
|
|
|
|
fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff);
|
|
fons__vertex(stash, x+n->x+0, y+n->y+1, u, v, 0xc00000ff);
|
|
fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff);
|
|
}
|
|
|
|
fons__flush(stash);
|
|
}
|
|
|
|
float fonsTextBounds(FONScontext* stash,
|
|
float x, float y,
|
|
const char* str, const char* end,
|
|
float* bounds)
|
|
{
|
|
FONSstate* state = fons__getState(stash);
|
|
unsigned int codepoint;
|
|
unsigned int utf8state = 0;
|
|
FONSquad q;
|
|
FONSglyph* glyph = NULL;
|
|
int prevGlyphIndex = -1;
|
|
short isize = (short)(state->size*10.0f);
|
|
short iblur = (short)state->blur;
|
|
float scale;
|
|
FONSfont* font;
|
|
float startx, advance;
|
|
float minx, miny, maxx, maxy;
|
|
|
|
if (stash == NULL) return 0;
|
|
if (state->font < 0 || state->font >= stash->nfonts) return 0;
|
|
font = stash->fonts[state->font];
|
|
if (font->data == NULL) return 0;
|
|
|
|
scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f);
|
|
|
|
// Align vertically.
|
|
y += fons__getVertAlign(stash, font, state->align, isize);
|
|
|
|
minx = maxx = x;
|
|
miny = maxy = y;
|
|
startx = x;
|
|
|
|
if (end == NULL)
|
|
end = str + strlen(str);
|
|
|
|
for (; str != end; ++str) {
|
|
if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str))
|
|
continue;
|
|
glyph = fons__getGlyph(stash, font, codepoint, isize, iblur);
|
|
if (glyph != NULL) {
|
|
fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q);
|
|
if (q.x0 < minx) minx = q.x0;
|
|
if (q.x1 > maxx) maxx = q.x1;
|
|
if (stash->params.flags & FONS_ZERO_TOPLEFT) {
|
|
if (q.y0 < miny) miny = q.y0;
|
|
if (q.y1 > maxy) maxy = q.y1;
|
|
} else {
|
|
if (q.y1 < miny) miny = q.y1;
|
|
if (q.y0 > maxy) maxy = q.y0;
|
|
}
|
|
}
|
|
prevGlyphIndex = glyph != NULL ? glyph->index : -1;
|
|
}
|
|
|
|
advance = x - startx;
|
|
|
|
// Align horizontally
|
|
if (state->align & FONS_ALIGN_LEFT) {
|
|
// empty
|
|
} else if (state->align & FONS_ALIGN_RIGHT) {
|
|
minx -= advance;
|
|
maxx -= advance;
|
|
} else if (state->align & FONS_ALIGN_CENTER) {
|
|
minx -= advance * 0.5f;
|
|
maxx -= advance * 0.5f;
|
|
}
|
|
|
|
if (bounds) {
|
|
bounds[0] = minx;
|
|
bounds[1] = miny;
|
|
bounds[2] = maxx;
|
|
bounds[3] = maxy;
|
|
}
|
|
|
|
return advance;
|
|
}
|
|
|
|
void fonsVertMetrics(FONScontext* stash,
|
|
float* ascender, float* descender, float* lineh)
|
|
{
|
|
FONSfont* font;
|
|
FONSstate* state = fons__getState(stash);
|
|
short isize;
|
|
|
|
if (stash == NULL) return;
|
|
if (state->font < 0 || state->font >= stash->nfonts) return;
|
|
font = stash->fonts[state->font];
|
|
isize = (short)(state->size*10.0f);
|
|
if (font->data == NULL) return;
|
|
|
|
if (ascender)
|
|
*ascender = font->ascender*isize/10.0f;
|
|
if (descender)
|
|
*descender = font->descender*isize/10.0f;
|
|
if (lineh)
|
|
*lineh = font->lineh*isize/10.0f;
|
|
}
|
|
|
|
void fonsLineBounds(FONScontext* stash, float y, float* miny, float* maxy)
|
|
{
|
|
FONSfont* font;
|
|
FONSstate* state = fons__getState(stash);
|
|
short isize;
|
|
|
|
if (stash == NULL) return;
|
|
if (state->font < 0 || state->font >= stash->nfonts) return;
|
|
font = stash->fonts[state->font];
|
|
isize = (short)(state->size*10.0f);
|
|
if (font->data == NULL) return;
|
|
|
|
y += fons__getVertAlign(stash, font, state->align, isize);
|
|
|
|
if (stash->params.flags & FONS_ZERO_TOPLEFT) {
|
|
*miny = y - font->ascender * (float)isize/10.0f;
|
|
*maxy = *miny + font->lineh*isize/10.0f;
|
|
} else {
|
|
*maxy = y + font->descender * (float)isize/10.0f;
|
|
*miny = *maxy - font->lineh*isize/10.0f;
|
|
}
|
|
}
|
|
|
|
const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height)
|
|
{
|
|
if (width != NULL)
|
|
*width = stash->params.width;
|
|
if (height != NULL)
|
|
*height = stash->params.height;
|
|
return stash->texData;
|
|
}
|
|
|
|
int fonsValidateTexture(FONScontext* stash, int* dirty)
|
|
{
|
|
if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) {
|
|
dirty[0] = stash->dirtyRect[0];
|
|
dirty[1] = stash->dirtyRect[1];
|
|
dirty[2] = stash->dirtyRect[2];
|
|
dirty[3] = stash->dirtyRect[3];
|
|
// Reset dirty rect
|
|
stash->dirtyRect[0] = stash->params.width;
|
|
stash->dirtyRect[1] = stash->params.height;
|
|
stash->dirtyRect[2] = 0;
|
|
stash->dirtyRect[3] = 0;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void fonsDeleteInternal(FONScontext* stash)
|
|
{
|
|
int i;
|
|
if (stash == NULL) return;
|
|
|
|
if (stash->params.renderDelete)
|
|
stash->params.renderDelete(stash->params.userPtr);
|
|
|
|
for (i = 0; i < stash->nfonts; ++i)
|
|
fons__freeFont(stash->fonts[i]);
|
|
|
|
if (stash->atlas) fons__deleteAtlas(stash->atlas);
|
|
if (stash->fonts) free(stash->fonts);
|
|
if (stash->texData) free(stash->texData);
|
|
if (stash->scratch) free(stash->scratch);
|
|
free(stash);
|
|
}
|
|
|
|
void fonsSetErrorCallback(FONScontext* stash, void (*callback)(void* uptr, int error, int val), void* uptr)
|
|
{
|
|
if (stash == NULL) return;
|
|
stash->handleError = callback;
|
|
stash->errorUptr = uptr;
|
|
}
|
|
|
|
void fonsGetAtlasSize(FONScontext* stash, int* width, int* height)
|
|
{
|
|
if (stash == NULL) return;
|
|
*width = stash->params.width;
|
|
*height = stash->params.height;
|
|
}
|
|
|
|
int fonsExpandAtlas(FONScontext* stash, int width, int height)
|
|
{
|
|
int i, maxy = 0;
|
|
unsigned char* data = NULL;
|
|
if (stash == NULL) return 0;
|
|
|
|
width = fons__maxi(width, stash->params.width);
|
|
height = fons__maxi(height, stash->params.height);
|
|
|
|
if (width == stash->params.width && height == stash->params.height)
|
|
return 1;
|
|
|
|
// Flush pending glyphs.
|
|
fons__flush(stash);
|
|
|
|
// Create new texture
|
|
if (stash->params.renderResize != NULL) {
|
|
if (stash->params.renderResize(stash->params.userPtr, width, height) == 0)
|
|
return 0;
|
|
}
|
|
// Copy old texture data over.
|
|
data = (unsigned char*)malloc(width * height);
|
|
if (data == NULL)
|
|
return 0;
|
|
for (i = 0; i < stash->params.height; i++) {
|
|
unsigned char* dst = &data[i*width];
|
|
unsigned char* src = &stash->texData[i*stash->params.width];
|
|
memcpy(dst, src, stash->params.width);
|
|
if (width > stash->params.width)
|
|
memset(dst+stash->params.width, 0, width - stash->params.width);
|
|
}
|
|
if (height > stash->params.height)
|
|
memset(&data[stash->params.height * width], 0, (height - stash->params.height) * width);
|
|
|
|
free(stash->texData);
|
|
stash->texData = data;
|
|
|
|
// Increase atlas size
|
|
fons__atlasExpand(stash->atlas, width, height);
|
|
|
|
// Add existing data as dirty.
|
|
for (i = 0; i < stash->atlas->nnodes; i++)
|
|
maxy = fons__maxi(maxy, stash->atlas->nodes[i].y);
|
|
stash->dirtyRect[0] = 0;
|
|
stash->dirtyRect[1] = 0;
|
|
stash->dirtyRect[2] = stash->params.width;
|
|
stash->dirtyRect[3] = maxy;
|
|
|
|
stash->params.width = width;
|
|
stash->params.height = height;
|
|
stash->itw = 1.0f/stash->params.width;
|
|
stash->ith = 1.0f/stash->params.height;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int fonsResetAtlas(FONScontext* stash, int width, int height)
|
|
{
|
|
int i, j;
|
|
if (stash == NULL) return 0;
|
|
|
|
// Flush pending glyphs.
|
|
fons__flush(stash);
|
|
|
|
// Create new texture
|
|
if (stash->params.renderResize != NULL) {
|
|
if (stash->params.renderResize(stash->params.userPtr, width, height) == 0)
|
|
return 0;
|
|
}
|
|
|
|
// Reset atlas
|
|
fons__atlasReset(stash->atlas, width, height);
|
|
|
|
// Clear texture data.
|
|
stash->texData = (unsigned char*)realloc(stash->texData, width * height);
|
|
if (stash->texData == NULL) return 0;
|
|
memset(stash->texData, 0, width * height);
|
|
|
|
// Reset dirty rect
|
|
stash->dirtyRect[0] = width;
|
|
stash->dirtyRect[1] = height;
|
|
stash->dirtyRect[2] = 0;
|
|
stash->dirtyRect[3] = 0;
|
|
|
|
// Reset cached glyphs
|
|
for (i = 0; i < stash->nfonts; i++) {
|
|
FONSfont* font = stash->fonts[i];
|
|
font->nglyphs = 0;
|
|
for (j = 0; j < FONS_HASH_LUT_SIZE; j++)
|
|
font->lut[j] = -1;
|
|
}
|
|
|
|
stash->params.width = width;
|
|
stash->params.height = height;
|
|
stash->itw = 1.0f/stash->params.width;
|
|
stash->ith = 1.0f/stash->params.height;
|
|
|
|
// Add white rect at 0,0 for debug drawing.
|
|
fons__addWhiteRect(stash, 2,2);
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
#endif
|