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82 lines
2 KiB
C++
82 lines
2 KiB
C++
#include "GLDraw.h"
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namespace Upp {
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Image RenderGlyphByPainter2(Point at, double angle, int chr, Font font, Color color, Size sz)
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{
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ImageBuffer ib(sz);
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BufferPainter sw(ib);
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sw.Clear(RGBAZero());
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sw.EvenOdd(true);
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sw.Translate(at.x, at.y);
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if(angle)
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sw.Rotate(angle);
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wchar text = chr;
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sw.Text(0, 0, &text, font, 1);
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sw.Fill(color);
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Image h = ib;
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return Premultiply(h);
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}
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int texture_glyph_cache_max = 64*1024*1024;
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struct sGlyphTextureMaker : LRUCache<GLTexture>::Maker {
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double angle;
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int chr;
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Font font;
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Color color;
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virtual String Key() const {
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StringBuffer h;
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RawCat(h, chr);
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RawCat(h, font);
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RawCat(h, angle);
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RawCat(h, color);
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return h;
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}
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virtual int Make(GLTexture& object) const {
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GL_TIMING("Do glyph");
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Point at(font[chr], font.GetLineHeight());
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int n = 2 * (at.x + at.y);
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at.x = max(at.x, at.y);
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at.y = max(at.x, at.y);
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Image img = AutoCrop(WithHotSpot(RenderGlyphByPainter2(at, angle, chr, font, color, Size(n, n)), at.x, at.y), RGBAZero());
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object = GLTexture(img, 0);
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return 4 * img.GetLength();
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}
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};
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GLTexture GetGlyphGLTextureCached(double angle, int chr, Font font, Color color)
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{
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GL_TIMING("GetGlyphGLTextureCached");
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static LRUCache<GLTexture> cache;
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sGlyphTextureMaker cm;
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cm.angle = angle;
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cm.chr = chr;
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cm.font = font;
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cm.color = color;
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cache.Shrink(texture_glyph_cache_max, 20000);
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return cache.Get(cm);
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}
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void GLDrawText(const GLContext2D& dd, Pointf pos, double angle, const wchar *text, Font font,
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Color ink, int n, const int *dx)
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{
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GL_TIMING("GLDrawText");
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int x = 0;
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Pointf u;
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if(angle)
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u = Polar(-angle);
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if(n < 0)
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n = wstrlen(text);
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for(int i = 0; i < n; i++) {
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GLTexture m = GetGlyphGLTextureCached(-angle, text[i], font, ink);
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Point h = m.GetHotSpot();
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Pointf p = (angle ? pos + x * u : Pointf(x + pos.x, pos.y)) - (Pointf)m.GetHotSpot();
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GLDrawTexture(dd, Rectf((Point)p, m.GetSize()), m);
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x += dx ? *dx++ : font[text[i]];
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}
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}
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};
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