def __init__(self, filename, size,
charset='abcdefghijklmnopqrstuvwxyz' +\
'ABCDEFGHIJKLMNOPQRSTUVWXYZ' +\
'1234567890;:,.!?%&"\' '):
#filename = os.path.join('fonts', filename)
self.filename = filename
self.charset = charset
self.charmap = {}
font = pygame.font.Font(filename, size)
self.descent = font.get_descent()
self.w, self.h = font.size(self.charset)
self.w += len(self.charset) * self.characterSpacing
self.lineSize = self.h
if self.w > self.maxTextureWidth:
self.h = (self.w / self.maxTextureWidth + 1) * self.h
self.w = self.maxTextureWidth
self.tw, self.th = resource.pow2(self.w), resource.pow2(self.h)
data = chr(0) * self.tw * self.th * 4
surface = pygame.image.fromstring(data, (self.tw, self.th), 'RGBA')
x, y = 0.0, 0.0
for c in charset:
render = font.render(c, True, (255, 255, 255))
render = pygame.transform.flip(render,False,True) # hack somehow my shit was upside down
cw, ch = font.size(c)
if x + cw >= self.tw:
x = 0.0
y += self.lineSize
surface.blit(render, (x, y))
self.charmap[c] = (x/self.tw, (self.th-y-self.lineSize)/self.th,
(x+cw)/self.tw, (self.th-y)/self.th), cw
x += cw + self.characterSpacing
self.tex = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, self.tex)
glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
glTexImage2D(GL_TEXTURE_2D, 0, 4, self.tw, self.th,
0, GL_RGBA, GL_UNSIGNED_BYTE,
pygame.image.tostring(surface, 'RGBA', True))
def __init__(self, filename, size,
charset='abcdefghijklmnopqrstuvwxyz' +\
'ABCDEFGHIJKLMNOPQRSTUVWXYZ' +\
'1234567890;:,.!?%&"\' '):
filename = os.path.join('fonts', filename)
self.filename = filename
self.charset = charset
self.charmap = {}
font = pygame.font.Font(filename, size)
self.descent = font.get_descent()
self.w, self.h = font.size(self.charset)
self.w += len(self.charset) * self.characterSpacing
self.lineSize = self.h
if self.w > self.maxTextureWidth:
self.h = (self.w / self.maxTextureWidth + 1) * self.h
self.w = self.maxTextureWidth
self.tw, self.th = res.pow2(self.w), res.pow2(self.h)
data = chr(0) * self.tw * self.th * 4
surface = pygame.image.fromstring(data, (self.tw, self.th), 'RGBA')
x, y = 0.0, 0.0
for c in charset:
render = font.render(c, True, (255, 255, 255))
cw, ch = font.size(c)
if x + cw >= self.tw:
x = 0.0
y += self.lineSize
surface.blit(render, (x, y))
self.charmap[c] = (x/self.tw, (self.th-y-self.lineSize)/self.th,
(x+cw)/self.tw, (self.th-y)/self.th), cw
x += cw + self.characterSpacing
self.tex = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, self.tex)
glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
glTexImage2D(GL_TEXTURE_2D, 0, 4, self.tw, self.th,
0, GL_RGBA, GL_UNSIGNED_BYTE,
pygame.image.tostring(surface, 'RGBA', True))
def _layout(self):
"""Generate indices, uvs and verts for the text."""
font = self.font_atlas.font
descent = font.get_descent()
n_chars = len(self._str) - self._str.count('\n')
verts = np.ones((4 * n_chars, 3), dtype='f4')
uvs = np.zeros((4 * n_chars, 2), dtype='f4')
indices = np.zeros(n_chars * 6, dtype='u4')
lines = self._str.split('\n')
# We lay out based on 48px tex so line size is scaled later
line_height = 48 * 1.3
curchar = 0
tex_ids = set()
tex = None
for lineno, line in enumerate(lines):
if not line:
continue
# (min_x, max_x, min_y, max_y, horizontal_advance_x)
metrics = np.array(font.metrics(line), dtype='f4')
cx = np.cumsum(metrics[:, 4])
xpos = metrics[:, 0:2] + cx[::, np.newaxis]
layout_width = cx[-1] #+ metrics[-1, 4]
align_offset = ALIGNMENTS[self._align] * layout_width
yoff = lineno * line_height
for idx, char in enumerate(line):
texregion = self.font_atlas.get(char)
# TODO: this could break if tex is reallocated (eg. because it
# grows)
tex = texregion.tex.tex
glyph_uvs = texregion.texcoords
glyph_verts = texregion.get_verts(texregion.width, texregion.height)
tex_ids.add(tex.glo)
# The kerning seems pretty bad on Pygame fonts...
# glyph_width = glyph_verts[1, 0] - glyph_verts[0, 0]
# metrics_width = xpos[idx, 1] - xpos[idx, 0]
# print(repr(char), glyph_width, metrics_width, metrics[idx, 4])
x = xpos[idx, 0]
quadnum = idx + curchar
start = quadnum * 4
glyph_slice = slice(start, start + 4)
verts[glyph_slice] = glyph_verts + (x - align_offset, yoff - descent, 0)
uvs[glyph_slice] = glyph_uvs
indices[6 * quadnum:6 * quadnum + 6] = QUAD + 4 * quadnum
curchar += len(line)
# Scale coordinates
resize = np.identity(3, dtype='f4')
scale = self.fontsize / 48
resize[0, 0] = scale
resize[1, 1] = scale
# TODO: handle use of multiple textures. We will be able to handle
# this eventually by selecting texture unit within the shader, or by
# making multiple draw calls
assert len(tex_ids) < 2, "Label got allocated over multiple textures"
self.tex = tex
self._verts = verts @ resize
self._uvs = uvs
self._indices = indices
# TODO: update self.lst, set dirty OR reallocate self.lst for new size
if self.tex is None:
if self.lst:
self.lst.free()
self.lst = None
self.vao = None
elif self.lst:
self.lst.realloc(len(self._verts), len(indices))
self.lst.indexbuf[:] = indices
self.lst.indexbuf += self.lst.vertoff.start
self.lst.vertbuf['in_uv'] = uvs
self._update()
elif self.tex and not self.vao:
self._migrate(self.layer._text_vao(self.font_atlas))