mirror of
https://github.com/NoelFB/blah.git
synced 2025-07-18 19:41:52 +08:00
removed drawing folder; moved to graphics
This commit is contained in:
Noel Berry
1096
src/graphics/batch.cpp
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1096
src/graphics/batch.cpp
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File diff suppressed because it is too large
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299
src/graphics/spritefont.cpp
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299
src/graphics/spritefont.cpp
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#include <blah/graphics/spritefont.h>
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#include <blah/images/font.h>
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#include <blah/images/packer.h>
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#include <blah/core/common.h>
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using namespace Blah;
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SpriteFont::CharRange::CharRange()
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: from(0), to(0) {}
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SpriteFont::CharRange::CharRange(Codepoint single)
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: from(single), to(single) {}
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SpriteFont::CharRange::CharRange(Codepoint from, Codepoint to)
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: from(from), to(to) {}
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const SpriteFont::CharSet SpriteFont::CharRange::ASCII = SpriteFont::CharSet({ CharRange(32, 128) });
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SpriteFont::SpriteFont()
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{
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size = 0;
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ascent = 0;
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descent = 0;
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line_gap = 0;
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}
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SpriteFont::SpriteFont(const FilePath& file, float size)
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{
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rebuild(file, size, CharRange::ASCII);
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}
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SpriteFont::SpriteFont(const FilePath& file, float size, const CharSet& charset)
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{
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rebuild(file, size, charset);
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}
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SpriteFont::SpriteFont(const Font& font, float size)
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{
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rebuild(font, size, CharRange::ASCII);
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}
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SpriteFont::SpriteFont(const Font& font, float size, const CharSet& charset)
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{
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rebuild(font, size, charset);
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}
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SpriteFont::SpriteFont(SpriteFont&& src) noexcept
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{
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name = src.name;
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size = src.size;
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ascent = src.ascent;
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descent = src.descent;
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line_gap = src.line_gap;
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m_characters = std::move(src.m_characters);
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m_kerning = std::move(src.m_kerning);
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m_atlas = std::move(src.m_atlas);
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}
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SpriteFont::~SpriteFont()
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{
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dispose();
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}
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void SpriteFont::dispose()
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{
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m_atlas.clear();
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m_characters.clear();
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m_kerning.clear();
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name.dispose();
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}
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SpriteFont& SpriteFont::operator=(SpriteFont && src) noexcept
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{
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name = src.name;
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size = src.size;
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ascent = src.ascent;
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descent = src.descent;
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line_gap = src.line_gap;
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m_characters = std::move(src.m_characters);
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m_kerning = std::move(src.m_kerning);
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m_atlas = std::move(src.m_atlas);
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return *this;
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}
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float SpriteFont::width_of(const String& text) const
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{
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float width = 0;
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float line_width = 0;
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Codepoint last = 0;
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for (int i = 0; i < text.length(); i ++)
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{
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if (text[i] == '\n')
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{
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line_width = 0;
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continue;
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}
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// get codepoint
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auto next = text.utf8_at(i);
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// increment length
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line_width += this->operator[](next).advance;
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// add kerning
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if (i > 0)
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line_width += get_kerning(last, next);
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if (line_width > width)
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width = line_width;
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// move to thext utf8 character
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i += text.utf8_length(i) - 1;
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last = next;
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}
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return width;
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}
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float SpriteFont::width_of_line(const String& text, int start) const
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{
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if (start < 0) return 0;
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if (start >= text.length()) return 0;
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float width = 0;
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Codepoint last = 0;
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for (int i = start; i < text.length(); i ++)
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{
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if (text[i] == '\n')
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return width;
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// get codepoint
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auto next = text.utf8_at(i);
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// increment length
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width += this->operator[](next).advance;
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// add kerning
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if (i > 0)
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width += get_kerning(last, next);
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// move to thext utf8 character
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i += text.utf8_length(i) - 1;
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last = next;
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}
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return width;
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}
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float SpriteFont::height_of(const String& text) const
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{
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if (text.length() <= 0)
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return 0;
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float height = line_height();
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for (int i = 0; i < text.length(); i ++)
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{
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if (text[i] == '\n')
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height += line_height();
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i += text.utf8_length(i) - 1;
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}
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return height - line_gap;
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}
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void SpriteFont::rebuild(const FilePath& file, float sz, const CharSet& charset)
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{
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dispose();
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Font font(file);
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if (font.is_valid())
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rebuild(font, sz, charset);
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}
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void SpriteFont::rebuild(const Font& font, float size, const CharSet& charset)
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{
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dispose();
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float scale = font.get_scale(size);
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name = font.family_name();
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ascent = font.ascent() * scale;
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descent = font.descent() * scale;
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line_gap = font.line_gap() * scale;
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this->size = size;
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Packer packer;
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packer.spacing = 0;
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packer.padding = 1;
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packer.max_size = 8192;
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packer.power_of_two = true;
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std::unordered_map<Codepoint, int> glyphs;
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Vector<Color> buffer;
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for (auto& range : charset)
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{
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auto from = range.from;
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auto to = range.to + 1;
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BLAH_ASSERT(to >= from, "Charset Range must be in pairs of [min,max]");
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for (auto i = from; i < to; i++)
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{
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auto glyph = font.get_glyph(i);
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if (glyph <= 0)
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continue;
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glyphs[i] = glyph;
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// add character
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auto ch = font.get_character(glyph, scale);
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m_characters[i].advance = ch.advance;
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m_characters[i].offset = Vec2(ch.offset_x, ch.offset_y);
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// pack glyph
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if (ch.has_glyph)
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{
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if (buffer.size() < ch.width * ch.height)
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buffer.resize(ch.width * ch.height);
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if (font.get_image(ch, buffer.data()))
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packer.add(i, ch.width, ch.height, buffer.data());
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}
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}
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}
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buffer.clear();
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packer.pack();
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for (auto& it : packer.pages)
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m_atlas.push_back(Texture::create(it));
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// add character subtextures
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for (auto& it : packer.entries())
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if (!it.empty)
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m_characters[(Codepoint)it.id].subtexture = Subtexture(m_atlas[it.page], it.packed, it.frame);
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// add kerning
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for (auto a = glyphs.begin(); a != glyphs.end(); a++)
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for (auto b = glyphs.begin(); b != glyphs.end(); b++)
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{
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auto kern = font.get_kerning(a->second, b->second, scale);
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if (kern != 0)
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set_kerning(a->first, b->first, kern);
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}
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}
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float SpriteFont::get_kerning(Codepoint codepoint0, Codepoint codepoint1) const
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{
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u64 index = ((u64)codepoint0 << 32) | codepoint1;
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auto it = m_kerning.find(index);
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if (it != m_kerning.end())
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return it->second;
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return 0.0f;
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}
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void SpriteFont::set_kerning(Codepoint codepoint0, Codepoint codepoint1, float value)
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{
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u64 index = ((u64)codepoint0 << 32) | codepoint1;
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if (value == 0)
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{
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m_kerning.erase(index);
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}
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else
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{
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m_kerning[index] = value;
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}
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}
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SpriteFont::Character& SpriteFont::get_character(Codepoint codepoint)
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{
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return m_characters[codepoint];
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}
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const SpriteFont::Character& SpriteFont::get_character(Codepoint codepoint) const
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{
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static const Character empty;
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auto it = m_characters.find(codepoint);
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if (it != m_characters.end())
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return it->second;
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return empty;
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}
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SpriteFont::Character& SpriteFont::operator[](Codepoint codepoint)
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{
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return m_characters[codepoint];
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}
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const SpriteFont::Character& SpriteFont::operator[](Codepoint codepoint) const
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{
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static const Character empty;
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auto it = m_characters.find(codepoint);
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if (it != m_characters.end())
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return it->second;
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return empty;
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}
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64
src/graphics/subtexture.cpp
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64
src/graphics/subtexture.cpp
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@ -0,0 +1,64 @@
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#include <blah/graphics/subtexture.h>
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#include <blah/math/calc.h>
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using namespace Blah;
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Subtexture::Subtexture() {}
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Subtexture::Subtexture(const TextureRef& texture)
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: Subtexture(texture, Rect(0, 0, (float)texture->width(), (float)texture->height())) {}
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Subtexture::Subtexture(const TextureRef& texture, Rect source)
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: Subtexture(texture, source, Rect(0, 0, source.w, source.h)) {}
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Subtexture::Subtexture(const TextureRef& texture, Rect source, Rect frame)
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: texture(texture), source(source), frame(frame)
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{
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update();
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}
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void Subtexture::update()
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{
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draw_coords[0].x = -frame.x;
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draw_coords[0].y = -frame.y;
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draw_coords[1].x = -frame.x + source.w;
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draw_coords[1].y = -frame.y;
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draw_coords[2].x = -frame.x + source.w;
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draw_coords[2].y = -frame.y + source.h;
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draw_coords[3].x = -frame.x;
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draw_coords[3].y = -frame.y + source.h;
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if (texture)
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{
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float uvx = 1.0f / (float)texture->width();
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float uvy = 1.0f / (float)texture->height();
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tex_coords[0].x = source.x * uvx;
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tex_coords[0].y = source.y * uvy;
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tex_coords[1].x = (source.x + source.w ) * uvx;
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tex_coords[1].y = source.y * uvy;
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tex_coords[2].x = (source.x + source.w) * uvx;
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tex_coords[2].y = (source.y + source.h) * uvy;
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tex_coords[3].x = source.x * uvx;
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tex_coords[3].y = (source.y + source.h) * uvy;
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}
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}
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void Subtexture::crop_info(const Rect& clip, Rect* dest_source, Rect* dest_frame) const
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{
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*dest_source = (clip + source.top_left() + frame.top_left()).overlap_rect(source);
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dest_frame->x = Calc::min(0.0f, frame.x + clip.x);
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dest_frame->y = Calc::min(0.0f, frame.y + clip.y);
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dest_frame->w = clip.w;
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dest_frame->h = clip.h;
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}
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Subtexture Subtexture::crop(const Rect& clip) const
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{
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Subtexture dst;
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dst.texture = texture;
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crop_info(clip, &dst.source, &dst.frame);
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dst.update();
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return dst;
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}
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