Build a static image for the About dialog box background.gtk4

7 files changed, 283 insertions, 0 deletions

diff --git a/tools/about/build.py b/tools/about/build.py
new file mode 100644
index 0000000..2267492
--- /dev/null
+++ b/tools/about/build.py
@@ -0,0 +1,120 @@
+
+# apt install libcairo2-dev pkg-config python3-dev
+# pip install pycairo
+
+import cairo
+import math
+import sys
+
+from enum import IntEnum
+
+from ttf import create_cairo_font_face_for_file
+
+
+WIDTH = 350
+HEIGHT = 430
+
+
+def deg2rad(degrees):
+    return degrees * (math.pi / 180)
+
+
+class TextAlignment(IntEnum):
+    LEFT = 1
+    CENTER = 2
+    RIGHT = 3
+
+
+def draw_text(ctx, text, pos, fsize, noise, theta = 0.0, align = TextAlignment.CENTER):
+    """Dessine un texte en respectant des propriétées."""
+
+    ctx.save()
+
+    ctx.set_font_size(fsize)
+
+    fascent, fdescent, fheight, fxadvance, fyadvance = ctx.font_extents()
+    x_off, y_off, tw, th = ctx.text_extents(text)[:4]
+
+    if align == TextAlignment.LEFT:
+        nx = 0
+    elif align == TextAlignment.RIGHT:
+        nx = -tw
+    else:
+        nx = -tw / 2.0
+
+    ny = fheight / 2
+
+    ctx.translate(pos[0], pos[1])
+    ctx.rotate(theta)
+    ctx.translate(nx, ny)
+    ctx.move_to(0,0)
+
+    ctx.text_path(text)
+    ctx.set_source_surface(noise, 0, -fheight)
+    ctx.fill_preserve()
+    ctx.set_source_rgb(1.0, 1.0, 1.0)
+    ctx.set_line_width(1)
+    ctx.stroke()
+
+    ctx.restore()
+
+
+if __name__ == '__main__':
+    """Point d'entrée du script."""
+
+    surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)
+
+    cr = cairo.Context(surface)
+
+    face = create_cairo_font_face_for_file('cour10p_b.ttf')
+    cr.set_font_face(face)
+
+    noise = cairo.ImageSurface.create_from_png('noise.png')
+
+    # Type d'édition
+
+    if len(sys.argv) > 2:
+
+        draw_text(cr, sys.argv[2], [ 300, 25 ], 32, noise,
+                  theta = deg2rad(270), align = TextAlignment.RIGHT)
+
+        cr.set_source_rgb(0, 0, 0)
+        cr.paint_with_alpha(0.4)
+
+    # Numéro de version
+
+    draw_text(cr, sys.argv[1], [ 149, 10 + 259 + 14 + 42 + 2 ], 23, noise, align=TextAlignment.LEFT)
+
+    cr.set_source_rgb(0, 0, 0)
+    cr.paint_with_alpha(0.5)
+
+    # Logo
+
+    logo = cairo.ImageSurface.create_from_png('logo.png')
+
+    scale_y = 259 / logo.get_height()
+
+    cr.save()
+
+    cr.translate((WIDTH - (logo.get_width() * scale_y)) / 2, 12)
+
+    cr.scale(scale_y, scale_y)
+
+    cr.set_source_surface(logo, 0, 0)
+    cr.paint()
+
+    cr.restore()
+
+    # Titre
+
+    draw_text(cr, 'Chrysalide', [ WIDTH / 2, 10 + 259 + 14 + 4 ], 42, noise)
+
+    # cr.rectangle(265, 30, 10, 10)
+    # cr.set_source_rgb(1, 0, 0)
+    # cr.fill()
+
+    # cr.rectangle(265, 255, 10, 10)
+    # cr.set_source_rgb(1, 0, 0)
+    # cr.fill()
+
+    surface.write_to_png('bg.png')
diff --git a/tools/about/courier-10-pitch-bold_EQ97V.zip b/tools/about/courier-10-pitch-bold_EQ97V.zip
new file mode 100644
index 0000000..0585fe6
--- /dev/null
+++ b/tools/about/courier-10-pitch-bold_EQ97V.zip
diff --git a/tools/about/courier10point.zip b/tools/about/courier10point.zip
new file mode 100644
index 0000000..82cd0de
--- /dev/null
+++ b/tools/about/courier10point.zip
diff --git a/tools/about/gen.sh b/tools/about/gen.sh
new file mode 100755
index 0000000..c22ec59
--- /dev/null
+++ b/tools/about/gen.sh
@@ -0,0 +1,52 @@
+#!/bin/bash
+
+
+# Cf. https://stackoverflow.com/questions/59895/how-do-i-get-the-directory-where-a-bash-script-is-located-from-within-the-script/246128#246128
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+pushd $SCRIPT_DIR > /dev/null
+
+
+# Obtention de la police Courier-10-Pitch-Bold
+# --------------------------------------------
+
+# https://fontsgeek.com/fonts/Courier-10-Pitch-Bold
+# https://fontsgeek.com/terms-and-conditions
+
+# => courier-10-pitch-bold_EQ97V.zip
+
+
+# Courier 10 Pitch font missing after upgrade to 17.04?
+# https://askubuntu.com/questions/914352/courier-10-pitch-font-missing-after-upgrade-to-17-04
+
+# https://groups.google.com/g/trelby/c/CGkpcMBXW9U
+# -> http://www.trelby.org/files/release/font/courier10point.zip
+# --> https://web.archive.org/web/20140326080337/http://www.trelby.org/files/release/font/courier10point.zip
+
+# https://news.ycombinator.com/item?id=18802628
+# -> https://www.trelby.org/assets/courier10point.zip
+
+# => courier10point.zip
+
+if [ ! -f cour10p_b.ttf ]; then
+
+    unzip -p courier10point.zip courier10point/cour10p_b.ttf > cour10p_b.ttf
+
+fi
+
+
+# Construction de l'image de fond
+#--------------------------------
+
+if [ $# -lt 1 -o $# -gt 2 ]; then
+
+    echo "Usage: $0 <version> <edition>"
+    exit 123
+
+fi
+
+python3 ./build.py $*
+
+cp bg.png ../../src/data/images/about-bg.png
+
+popd > /dev/null
diff --git a/tools/about/logo.png b/tools/about/logo.png
new file mode 100644
index 0000000..9bf9969
--- /dev/null
+++ b/tools/about/logo.png
diff --git a/tools/about/noise.png b/tools/about/noise.png
new file mode 100644
index 0000000..b5d6b91
--- /dev/null
+++ b/tools/about/noise.png
diff --git a/tools/about/ttf.py b/tools/about/ttf.py
new file mode 100644
index 0000000..eb6c027
--- /dev/null
+++ b/tools/about/ttf.py
@@ -0,0 +1,111 @@
+
+# Source: https://www.cairographics.org/cookbook/freetypepython/
+
+import ctypes as ct
+import cairo
+
+_initialized = False
+def create_cairo_font_face_for_file (filename, faceindex=0, loadoptions=0):
+    "given the name of a font file, and optional faceindex to pass to FT_New_Face" \
+    " and loadoptions to pass to cairo_ft_font_face_create_for_ft_face, creates" \
+    " a cairo.FontFace object that may be used to render text with that font."
+    global _initialized
+    global _freetype_so
+    global _cairo_so
+    global _ft_lib
+    global _ft_destroy_key
+    global _surface
+
+    CAIRO_STATUS_SUCCESS = 0
+    FT_Err_Ok = 0
+
+    if not _initialized:
+        # find shared objects
+        _freetype_so = ct.CDLL("libfreetype.so.6")
+        _cairo_so = ct.CDLL("libcairo.so.2")
+        _cairo_so.cairo_ft_font_face_create_for_ft_face.restype = ct.c_void_p
+        _cairo_so.cairo_ft_font_face_create_for_ft_face.argtypes = [ ct.c_void_p, ct.c_int ]
+        _cairo_so.cairo_font_face_get_user_data.restype = ct.c_void_p
+        _cairo_so.cairo_font_face_get_user_data.argtypes = (ct.c_void_p, ct.c_void_p)
+        _cairo_so.cairo_font_face_set_user_data.argtypes = (ct.c_void_p, ct.c_void_p, ct.c_void_p, ct.c_void_p)
+        _cairo_so.cairo_set_font_face.argtypes = [ ct.c_void_p, ct.c_void_p ]
+        _cairo_so.cairo_font_face_status.argtypes = [ ct.c_void_p ]
+        _cairo_so.cairo_font_face_destroy.argtypes = (ct.c_void_p,)
+        _cairo_so.cairo_status.argtypes = [ ct.c_void_p ]
+        # initialize freetype
+        _ft_lib = ct.c_void_p()
+        status = _freetype_so.FT_Init_FreeType(ct.byref(_ft_lib))
+        if  status != FT_Err_Ok :
+            raise RuntimeError("Error %d initializing FreeType library." % status)
+        #end if
+
+        class PycairoContext(ct.Structure):
+            _fields_ = \
+                [
+                    ("PyObject_HEAD", ct.c_byte * object.__basicsize__),
+                    ("ctx", ct.c_void_p),
+                    ("base", ct.c_void_p),
+                ]
+        #end PycairoContext
+
+        _surface = cairo.ImageSurface(cairo.FORMAT_A8, 0, 0)
+        _ft_destroy_key = ct.c_int() # dummy address
+        _initialized = True
+    #end if
+
+    ft_face = ct.c_void_p()
+    cr_face = None
+    try :
+        # load FreeType face
+        status = _freetype_so.FT_New_Face(_ft_lib, filename.encode("utf-8"), faceindex, ct.byref(ft_face))
+        if status != FT_Err_Ok :
+            raise RuntimeError("Error %d creating FreeType font face for %s" % (status, filename))
+        #end if
+
+        # create Cairo font face for freetype face
+        cr_face = _cairo_so.cairo_ft_font_face_create_for_ft_face(ft_face, loadoptions)
+        status = _cairo_so.cairo_font_face_status(cr_face)
+        if status != CAIRO_STATUS_SUCCESS :
+            raise RuntimeError("Error %d creating cairo font face for %s" % (status, filename))
+        #end if
+        # Problem: Cairo doesn't know to call FT_Done_Face when its font_face object is
+        # destroyed, so we have to do that for it, by attaching a cleanup callback to
+        # the font_face. This only needs to be done once for each font face, while
+        # cairo_ft_font_face_create_for_ft_face will return the same font_face if called
+        # twice with the same FT Face.
+        # The following check for whether the cleanup has been attached or not is
+        # actually unnecessary in our situation, because each call to FT_New_Face
+        # will return a new FT Face, but we include it here to show how to handle the
+        # general case.
+        if _cairo_so.cairo_font_face_get_user_data(cr_face, ct.byref(_ft_destroy_key)) == None :
+            status = _cairo_so.cairo_font_face_set_user_data \
+              (
+                cr_face,
+                ct.byref(_ft_destroy_key),
+                ft_face,
+                _freetype_so.FT_Done_Face
+              )
+            if status != CAIRO_STATUS_SUCCESS :
+                raise RuntimeError("Error %d doing user_data dance for %s" % (status, filename))
+            #end if
+            ft_face = None # Cairo has stolen my reference
+        #end if
+
+        # set Cairo font face into Cairo context
+        cairo_ctx = cairo.Context(_surface)
+        cairo_t = PycairoContext.from_address(id(cairo_ctx)).ctx
+        _cairo_so.cairo_set_font_face(cairo_t, cr_face)
+        status = _cairo_so.cairo_font_face_status(cairo_t)
+        if status != CAIRO_STATUS_SUCCESS :
+            raise RuntimeError("Error %d creating cairo font face for %s" % (status, filename))
+        #end if
+
+    finally :
+        _cairo_so.cairo_font_face_destroy(cr_face)
+        _freetype_so.FT_Done_Face(ft_face)
+    #end try
+
+    # get back Cairo font face as a Python object
+    face = cairo_ctx.get_font_face()
+    return face
+#end create_cairo_font_face_for_file