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add: Rect font rendering

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This commit is contained in:
Simon Hardt
2022-03-05 23:06:10 +01:00
parent 0fe1509c6c
commit e1e410561c
5 changed files with 151 additions and 6 deletions
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15
frame/src/Rect.hpp Normal file
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@@ -0,0 +1,15 @@
#pragma once
#include <cstdint>
namespace frame
{
struct Rect
{
int32_t top;
int32_t left;
int32_t width;
int32_t height;
};
} // namespace frame

84
frame/src/main.cpp
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@@ -82,14 +82,88 @@ int main()
pos.y += font->getHeight(text, 250) / 2;
pos.y -= font->getMaxYOffset(text, 250) + font->getHeight(text, 250);
target.DrawText(text, pos, *font, 250);
// target.DrawTextGlyphBounds(text, pos, *font, 250);
// target.DrawLine({0, (int32_t)pos.y},
// {(int32_t)display->getSize().width, pos.y});
target.DrawTextGlyphBounds(text, pos, *font, 250);
target.DrawLine({0, (int32_t)pos.y},
{(int32_t)display->getSize().width, pos.y});
auto rect = frame::Rect{0,
0,
(int)display->getSize().width,
(int)display->getSize().height};
target.DrawText(rect, text, *font, 250);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
std::this_thread::sleep_for(10s);
target.Clear();
target.DrawText(rect, text, *font, 250, frame::AlignHorizontal::CENTER);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect, text, *font, 250, frame::AlignHorizontal::RIGHT);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect,
text,
*font,
250,
frame::AlignHorizontal::LEFT,
frame::AlignVertical::CENTER);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect,
text,
*font,
250,
frame::AlignHorizontal::CENTER,
frame::AlignVertical::CENTER);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect,
text,
*font,
250,
frame::AlignHorizontal::RIGHT,
frame::AlignVertical::CENTER);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect,
text,
*font,
250,
frame::AlignHorizontal::LEFT,
frame::AlignVertical::BOTTOM);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect,
text,
*font,
250,
frame::AlignHorizontal::CENTER,
frame::AlignVertical::BOTTOM);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
target.Clear();
target.DrawText(rect,
text,
*font,
250,
frame::AlignHorizontal::RIGHT,
frame::AlignVertical::BOTTOM);
display->Display(target.getImage());
std::this_thread::sleep_for(2s);
display->Clear(frame::display::Color::WHITE);
}

42
frame/src/render/RenderTarget.cpp
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@@ -182,6 +182,48 @@ namespace frame::render
}
}
void RenderTarget::DrawText(Rect rect,
std::string pText,
font::Font const& pFont,
uint32_t size,
AlignHorizontal alignHorizontal,
AlignVertical alignVertical)
{
auto const lineSpacing = pFont.getLineSpacing(size);
auto const lineSpacing_3 = lineSpacing / 3;
Vector start{rect.top, rect.left};
auto text_height = pFont.getHeight(pText, size);
auto length = pFont.getLength(pText, size);
auto y_offset = pFont.getMaxYOffset(pText, size);
switch(alignVertical)
{
case AlignVertical::TOP: start.y += lineSpacing_3 * 2; break;
case AlignVertical::CENTER:
start.y += rect.height / 2;
start.y += text_height / 2;
start.y -= y_offset + text_height;
break;
case AlignVertical::BOTTOM:
start.y += rect.height;
start.y += text_height + y_offset;
break;
}
switch(alignHorizontal)
{
case AlignHorizontal::CENTER:
start.x += rect.width / 2;
start.x -= length / 2;
break;
case AlignHorizontal::RIGHT: start.x += rect.width - length; break;
}
DrawText(pText, start, pFont, size);
}
void RenderTarget::DrawTextGlyphBounds(std::string_view pText,
Vector pCenterLineStart,
font::Font const& pFont,

14
frame/src/render/RenderTarget.hpp
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@@ -2,9 +2,16 @@
#include "../Color.hpp"
#include "../Image.hpp"
#include "../Rect.hpp"
#include "../Vector.hpp"
#include "../font/Font.hpp"
namespace frame
{
enum class AlignVertical { TOP, CENTER, BOTTOM };
enum class AlignHorizontal { LEFT, CENTER, RIGHT };
} // namespace frame
namespace frame::render
{
@@ -45,6 +52,13 @@ namespace frame::render
font::Font const& pFont,
uint32_t size);
void DrawText(Rect rect,
std::string pText,
font::Font const& pFont,
uint32_t size,
AlignHorizontal alignHorizontal = AlignHorizontal::LEFT,
AlignVertical alignVertical = AlignVertical::TOP);
void DrawTextGlyphBounds(std::string_view pText,
Vector pCenterLineStart,
font::Font const& pFont,