43 lines
1.7 KiB
C++
Executable File
43 lines
1.7 KiB
C++
Executable File
#ifndef __BUFFEREDCGA_INCLUDE_H_
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#define __BUFFEREDCGA_INCLUDE_H_
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#include "devices/CGA.h"
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#include "devices/Keyboard.h"
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#include "lib/ScrollbackBuffer.h"
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// NOTE: I added this file, I don't know if it will be used till the end but right know it's nice to have
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// NOTE: I wanted to write to screen_buffer always and copy this to video mem to allow easier composition
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// of different screen elements, but this would disable printing before initialization or I would
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// have to replace print with unbuffered_print or something, which I don't like.
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class BufferedCGA : public CGA {
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private:
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ScrollbackBuffer* scrollback_buffer; // Contains previous pages
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CGA::cga_page_t* screen_buffer; // Contains the current page separately from the scrollback.
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bool initialized; // Don't do ScrollbackBuffer actions if not initialized
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BufferedCGA(const BufferedCGA&) = delete;
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public:
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BufferedCGA() : CGA(), initialized(false), scrollback(0) {};
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~BufferedCGA() {
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if (this->initialized) {
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delete this->scrollback_buffer;
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delete this->screen_buffer;
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}
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}
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unsigned char scrollback; // The page that is displayed, public to enable page display
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void init(unsigned int pages); // Scrollback needs to be initialized after memorymanagement
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void display_scrollback(); // Write the current_page to CGA memory
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void scroll_page_backward(); // Scroll up the page history
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void scroll_page_forward(); // Scroll down the page history (to the current page)
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void print(char* string, int n, unsigned char attrib = STD_ATTR) override;
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void scrollup() override;
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void clear() override;
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};
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#endif
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