Method UploadEntityLayerText

src/engine/client/text.cpp:762–822

	}

	void UploadEntityLayerText(const CImageInfo &TextImage, int TexSubWidth, int TexSubHeight, const char *pText, int Length, float x, float y, int FontSize)
	{
		if(FontSize < 1)
			return;

		const size_t PixelSize = TextImage.PixelSize();
		const char *pCurrent = pText;
		const char *pEnd = pCurrent + Length;
		int WidthLastChars = 0;

		while(pCurrent < pEnd)
		{
			const char *pTmp = pCurrent;
			const int NextCharacter = str_utf8_decode(&pTmp);

			if(NextCharacter)
			{
				FT_Face Face;
				FT_UInt GlyphIndex = GetCharGlyph(NextCharacter, &Face, true);
				if(GlyphIndex == 0)
				{
					pCurrent = pTmp;
					continue;
				}

				FT_Set_Pixel_Sizes(Face, 0, FontSize);
				if(FT_Load_Char(Face, NextCharacter, FT_LOAD_RENDER | FT_LOAD_NO_BITMAP))
				{
					log_debug("textrender", "Error loading glyph. Chr=%d GlyphIndex=%u", NextCharacter, GlyphIndex);
					pCurrent = pTmp;
					continue;
				}

				const FT_Bitmap *pBitmap = &Face->glyph->bitmap;
				if(pBitmap->pixel_mode != FT_PIXEL_MODE_GRAY)
				{
					log_debug("textrender", "Error loading glyph, unsupported pixel mode. Chr=%d GlyphIndex=%u PixelMode=%d", NextCharacter, GlyphIndex, pBitmap->pixel_mode);
					pCurrent = pTmp;
					continue;
				}

				for(unsigned OffY = 0; OffY < pBitmap->rows; ++OffY)
				{
					for(unsigned OffX = 0; OffX < pBitmap->width; ++OffX)
					{
						const int ImgOffX = std::clamp(x + OffX + WidthLastChars, x, (x + TexSubWidth) - 1);
						const int ImgOffY = std::clamp(y + OffY, y, (y + TexSubHeight) - 1);
						const size_t ImageOffset = ImgOffY * (TextImage.m_Width * PixelSize) + ImgOffX * PixelSize;
						for(size_t i = 0; i < PixelSize - 1; ++i)
						{
							TextImage.m_pData[ImageOffset + i] = 255;
						}
						TextImage.m_pData[ImageOffset + PixelSize - 1] = pBitmap->buffer[OffY * pBitmap->width + OffX];
					}
				}

				WidthLastChars += (pBitmap->width + 1);
			}