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https://gitlab.com/sortix/sortix.git
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114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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lfbtextbuffer.h
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An indexable text buffer rendered to a graphical linear frame buffer.
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*******************************************************************************/
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#ifndef SORTIX_LFBTEXTBUFFER_H
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#define SORTIX_LFBTEXTBUFFER_H
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#include <sortix/kernel/textbuffer.h>
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namespace Sortix {
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// Needed information:
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// Linear frame bufer
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// - Pointer
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// - Format (bit depth)
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// - X resolution, Y resolution, scanline size
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// Font
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// - Pointer to our copy of the font.
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// Color table for each VGA color in <sortix/vga.h>
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// Number of columns and rows.
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// Table of characters and attributes.
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struct LFBTextBufferInfo
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{
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uint8_t* lfb;
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size_t lfbformat;
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size_t xres;
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size_t yres;
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size_t columns;
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size_t rows;
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uint16_t* chars;
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uint16_t* attrs;
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uint8_t* vgafont;
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};
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class LFBTextBuffer : public TextBuffer
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{
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friend LFBTextBuffer* CreateLFBTextBuffer(uint8_t* lfb, uint32_t lfbformat,
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size_t xres, size_t yres,
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size_t scansize);
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private:
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LFBTextBuffer();
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public:
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virtual ~LFBTextBuffer();
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virtual size_t Width() const;
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virtual size_t Height() const;
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virtual TextChar GetChar(TextPos pos) const;
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virtual void SetChar(TextPos pos, TextChar c);
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virtual uint16_t GetCharAttr(TextPos pos) const;
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virtual void SetCharAttr(TextPos pos, uint16_t attrval);
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virtual void Scroll(ssize_t off, TextChar fillwith);
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virtual void Move(TextPos to, TextPos from, size_t numchars);
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virtual void Fill(TextPos from, TextPos to, TextChar fillwith,
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uint16_t fillattr);
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virtual bool GetCursorEnabled() const;
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virtual void SetCursorEnabled(bool enablecursor);
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virtual TextPos GetCursorPos() const;
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virtual void SetCursorPos(TextPos newcursorpos);
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private:
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void RenderChar(uint16_t vgachar, size_t posx, size_t posy);
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void RenderCharAt(TextPos pos);
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void RenderRegion(size_t c1, size_t r1, size_t c2, size_t r2);
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void RenderRange(TextPos from, TextPos to);
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bool UsablePosition(TextPos pos) const;
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size_t OffsetOfPos(TextPos pos) const;
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TextPos CropPosition(TextPos pos) const;
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TextPos AddToPosition(TextPos pos, size_t count);
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private:
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uint8_t* lfb;
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uint8_t* font;
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uint16_t* chars;
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uint16_t* attrs;
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size_t columns;
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size_t rows;
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size_t pixelsx;
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size_t pixelsy;
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size_t scansize;
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uint32_t colors[16UL];
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uint32_t cursorcolor;
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uint32_t lfbformat;
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bool cursorenabled;
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TextPos cursorpos;
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};
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LFBTextBuffer* CreateLFBTextBuffer(uint8_t* lfb, uint32_t lfbformat,
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size_t xres, size_t yres, size_t scansize);
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} // namespace Sortix
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#endif
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