renun/koreader
1
0
Fork 0
mirror of https://github.com/koreader/koreader.git synced 2025-08-10 00:52:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

render text with background and foreground 'color'

Browse Source
This commit is contained in:
chrox
2013-03-16 19:46:37 +08:00
parent 1f01537751
commit 26e2435fc6
3 changed files with 22 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
frontend/ui/rendertext.lua
View File

@@ -4,14 +4,16 @@ require "cache"
TODO: all these functions should probably be methods on Face objects
]]--
function getGlyph(face, charcode)
local hash = "glyph|"..face.hash.."|"..charcode
function getGlyph(face, charcode, bgcolor, fgcolor)
if bgcolor == nil then bgcolor = 0.0 end
if fgcolor == nil then fgcolor = 1.0 end
local hash = "glyph|"..face.hash.."|"..charcode.."|"..bgcolor.."|"..fgcolor
local glyph = Cache:check(hash)
if glyph then
-- cache hit
return glyph[1]
end
local rendered_glyph = face.ftface:renderGlyph(charcode)
local rendered_glyph = face.ftface:renderGlyph(charcode, bgcolor, fgcolor)
if not rendered_glyph then
DEBUG("error rendering glyph (charcode=", charcode, ") for face", face)
return
@@ -75,7 +77,7 @@ function sizeUtf8Text(x, width, face, text, kerning)
return { x = pen_x, y_top = pen_y_top, y_bottom = pen_y_bottom}
end
function renderUtf8Text(buffer, x, y, face, text, kerning)
function renderUtf8Text(buffer, x, y, face, text, kerning, bgcolor, fgcolor)
if not text then
DEBUG("renderUtf8Text called without text");
return 0
@@ -89,7 +91,7 @@ function renderUtf8Text(buffer, x, y, face, text, kerning)
for uchar in string.gfind(text, "([%z\1-\127\194-\244][\128-\191]*)") do
if pen_x < buffer_width then
local charcode = util.utf8charcode(uchar)
local glyph = getGlyph(face, charcode)
local glyph = getGlyph(face, charcode, bgcolor, fgcolor)
if kerning and (prevcharcode ~= 0) then
pen_x = pen_x + face.ftface:getKerning(prevcharcode, charcode)
end
@@ -97,7 +99,7 @@ function renderUtf8Text(buffer, x, y, face, text, kerning)
glyph.bb,
x + pen_x + glyph.l, y - glyph.t,
0, 0,
glyph.bb:getWidth(), glyph.bb:getHeight())
glyph.bb:getWidth(), glyph.bb:getHeight(), 1)
pen_x = pen_x + glyph.ax
prevcharcode = charcode
end -- if pen_x < buffer_width