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

1 files changed, 120 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')