diff options
Diffstat (limited to 'txtgameengine/fonts.py')
| -rw-r--r-- | txtgameengine/fonts.py | 61 |
1 files changed, 58 insertions, 3 deletions
diff --git a/txtgameengine/fonts.py b/txtgameengine/fonts.py index fcbf8b5..afa9d87 100644 --- a/txtgameengine/fonts.py +++ b/txtgameengine/fonts.py @@ -5,12 +5,16 @@ from typing import Optional import typing import xml.dom.minidom as minidom +from .shaders import FontShader + if typing.TYPE_CHECKING: from .twod import Texture from .app import TxtGameApp class Font(ABC): + texture: 'Texture' + def __init__(self): self.glyphs = dict() @@ -31,14 +35,15 @@ class Glyph: class BitmapFont(Font): - def __init__(self, texture: Texture, xml_path: str): + def __init__(self, texture: 'Texture', xml_path: str): + super().__init__() self.texture = texture - dom = minidom.parse(xml_path) + dom = minidom.parse(str(xml_path)) for char in dom.getElementsByTagName('Char'): code = char.attributes['code'].value width = char.attributes['width'].value x_render_offset, y_render_offset = char.attributes['offset'].value.split(' ') - x_texture_offset, y_texture_offset, x_texture_width, y_texture_width = char.attributes['rect'].split(' ') + x_texture_offset, y_texture_offset, x_texture_width, y_texture_width = char.attributes['rect'].value.split(' ') self.glyphs[code] = \ Glyph(self, int(x_texture_offset), int(y_texture_offset), int(x_texture_width), int(y_texture_width), int(x_render_offset), int(y_render_offset), int(width)) @@ -48,10 +53,60 @@ class BitmapFont(Font): from .twod import Texture return cls(Texture(app, image_path), xml_path) + @classmethod + def fira_mono(cls, app: 'TxtGameApp'): + from .app import builtin_resource_path + return cls.load(app, builtin_resource_path / 'fonts/fira_code/regular.png', + builtin_resource_path / 'fonts/fira_code/regular.xml') + class TextRenderer: def __init__(self, app: 'TxtGameApp'): self.app = app + self.font: Font = None + self.shader = FontShader(app) def use_font(self, font: Font): self.font = font + + def render_text(self, x: int, y: int, text: str) -> typing.Tuple[int, int]: + """No support for newlines""" + if self.font is None: + raise ValueError("No font set") + glyphs = list(map(self.font.get_glyph, text)) + missing = [t for t, g in zip(text, glyphs) if g is None] + if missing: + raise ValueError("No glyph found for character '%s'" % missing[0]) + with self.shader: + self.app.render.bind_texture(self.shader.textureSampler, self.font.texture) + for glyph in glyphs: + x, y = self._render_glyph(glyph, x, y) + return x, y + + def _render_glyph(self, glyph: Glyph, x: int, y: int) -> typing.Tuple[int, int]: + low_x = x + glyph.x_render_offset + high_x = low_x + glyph.x_texture_width + low_y = y + glyph.y_render_offset + high_y = low_y + glyph.y_texture_width + low_x, low_y = self.app.coords.from_pixels_to_screen(low_x, low_y) + high_x, high_y = self.app.coords.from_pixels_to_screen(high_x, high_y) + tex_low_x = glyph.x_texture_offset + tex_high_x = tex_low_x + glyph.x_texture_width + tex_low_y = glyph.y_texture_offset + tex_high_y = tex_low_y + glyph.y_texture_width + tex_low_x, tex_low_y = self.app.coords.from_pixels_to_screen(tex_low_x, tex_low_y) + tex_high_x, tex_high_y = self.app.coords.from_pixels_to_screen(tex_high_x, tex_high_y) + render = self.app.render.setup_buffer([ + low_x, low_y, + high_x, low_y, + low_x, high_y, + high_x, high_y, + ]) + uvs = self.app.render.setup_buffer([ + tex_low_x, tex_low_y, + tex_high_x, tex_low_y, + tex_low_x, tex_high_y, + tex_high_x, tex_high_y, + ]) + self.app.render.textured_triangle(render, uvs, 4) + return x + glyph.x_advance, y |