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118 lines
3.9 KiB
C++
118 lines
3.9 KiB
C++
/*
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* Renderer.hpp
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*
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* Created on: 7 maj 2019
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* Author: robert
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*/
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#ifndef GUI_CORE_RENDERER_HPP_
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#define GUI_CORE_RENDERER_HPP_
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#include <vector>
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#include "DrawCommand.hpp"
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#include "Context.hpp"
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#include "Font.hpp"
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namespace gui
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{
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enum class LineExpansionDirection
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{
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LINE_EXPAND_UP = 1,
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LINE_EXPAND_DOWN = 1 << 1,
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LINE_EXPAND_LEFT = 1 << 2,
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LINE_EXPAND_RIGHT = 1 << 3
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};
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enum class Line45degEnd
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{
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TOP_FLAT = 1,
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TOP_TIP = 1 << 1,
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BOTTOM_FLAT = 1 << 2,
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BOTTOM_TIP = 1 << 3
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};
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class Renderer
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{
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/**
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* convention: all the coordinates are is a pixel. the origin is (0,0) and it's ABOVE (UP) & TO THE LEFT of the
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* topmost left pixel. Therefore to draw 1px wide line spanning the whole topmost row, it will be drawHorizontal
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* (0,0, 1px, length, ::DOWN). It's equvalent to drawHorizontal (0,1, 1px, length, ::UP); default is DOWN &
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* RIGHT a is the first pixel. a is (0,0) DOWN (& RIGHT) == a is (0,1) UP (& RIGHT) b is (2,2) UP (& RIGHT) ==
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* b is (2,1) DOWN (& RIGHT)
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*
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* _| 0 1 2 3
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* 0 a
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* 1 b
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* 2
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* 3
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*
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*/
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protected:
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/**
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* @brief Function for drawing horizontal line with given width in specified direction
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*/
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void drawHorizontalLine(Context *ctx,
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int16_t x,
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int16_t y,
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uint16_t width,
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uint16_t penWidth,
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Color color,
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LineExpansionDirection dir);
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/**
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* @brief Function for drawing vertical line with given width in specified direction
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*/
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void drawVerticalLine(Context *ctx,
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int16_t x,
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int16_t y,
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uint16_t height,
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uint16_t penWidth,
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Color color,
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LineExpansionDirection dir);
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/**
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* @brief Function for drawing a line skewed at 45 deg with given width in specified direction. by default the
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* line is drawn from top to bottom in V-dim and from left to right in H-dim.
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* @param[in] toRight changes H-dim draw direction, so it is drawn to the right of vertical axis.
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*/
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void draw45degLine(Context *ctx,
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int16_t x,
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int16_t y,
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uint16_t side,
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uint16_t penWidth,
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Color color,
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LineExpansionDirection dir,
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bool toRight,
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Line45degEnd lineEnds = Line45degEnd::TOP_FLAT | Line45degEnd::BOTTOM_FLAT);
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/**
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* @brief Function that draws line on the given context
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*/
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void drawLine(Context *ctx, CommandLine *cmd);
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/**
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* @brief Function draws rectangle on the given context;
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*/
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void drawRectangle(Context *ctx, CommandRectangle *cmd);
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/**
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* @brief Function draws line of text with specified font on the given context;
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*/
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void drawText(Context *ctx, CommandText *cmd);
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/**
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* @brief Draws single glyph to specified context
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*/
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void drawChar(
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Context *context, const int16_t x, const int16_t y, Font *font, FontGlyph *glyph, const Color color);
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/**
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* @brief Draws an image with specified ID on given coordinates.
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*/
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void drawImage(Context *ctx, CommandImage *cmd);
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public:
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Renderer();
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virtual ~Renderer();
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void render(Context *ctx, std::vector<DrawCommand *> &commands);
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};
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} /* namespace gui */
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#endif /* GUI_CORE_RENDERER_HPP_ */
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