Storyboard to Slides

from pptx import Presentation
from pptx.util import Inches, Pt, Emu
from pptx.dml.color import RGBColor

prs = Presentation()
prs.slide_width = Inches(13.333)   # 16:9
prs.slide_height = Inches(7.5)

For 4:3 slides: Inches(10) x Inches(7.5).

3. Define Theme Constants

# Customize per project
THEME = {
    "bg_color": RGBColor(0x1A, 0x1A, 0x2E),     # dark navy
    "title_color": RGBColor(0xFF, 0xFF, 0xFF),
    "text_color": RGBColor(0xE0, 0xE0, 0xE0),
    "accent_color": RGBColor(0x64, 0xB5, 0xF6),
    "title_font": "Arial",
    "body_font": "Arial",
    "title_size": Pt(36),
    "body_size": Pt(18),
}

Choose colors that contrast well with the generated images. For light images use dark text overlay with semi-transparent background; for dark images use white text.

4. Layout Implementations

full_bg — Full-screen background image + overlay text

from pptx.util import Inches, Pt, Emu
from pptx.dml.color import RGBColor
from pptx.enum.text import PP_ALIGN, MSO_ANCHOR

def add_full_bg_slide(prs, img_path, title, subtitle="", theme=THEME):
    slide = prs.slides.add_slide(prs.slide_layouts[6])  # blank
    # Background image
    slide.shapes.add_picture(img_path, 0, 0, prs.slide_width, prs.slide_height)
    # Semi-transparent overlay
    overlay = slide.shapes.add_shape(
        1, 0, 0, prs.slide_width, prs.slide_height  # MSO_SHAPE.RECTANGLE = 1
    )
    overlay.fill.solid()
    overlay.fill.fore_color.rgb = RGBColor(0, 0, 0)
    overlay.shadow.inherit = False
    overlay.line.fill.background()
    # Set overlay transparency via XML (access the shape's XML element, not the fill object)
    from pptx.oxml.ns import qn
    solid = overlay._element.find(f'.//{qn("a:solidFill")}')
    if solid is not None:
        srgb = solid.find(qn("a:srgbClr"))
        if srgb is not None:
            alpha = srgb.makeelement(qn("a:alpha"), {"val": "40000"})  # 40% opacity
            srgb.append(alpha)
    # Title
    txBox = slide.shapes.add_textbox(Inches(1), Inches(2.5), Inches(11), Inches(2))
    tf = txBox.text_frame
    tf.word_wrap = True
    p = tf.paragraphs[0]
    p.text = title
    p.font.size = Pt(44)
    p.font.bold = True
    p.font.color.rgb = theme["title_color"]
    p.alignment = PP_ALIGN.CENTER
    if subtitle:
        p2 = tf.add_paragraph()
        p2.text = subtitle
        p2.font.size = Pt(24)
        p2.font.color.rgb = theme["text_color"]
        p2.alignment = PP_ALIGN.CENTER
    return slide

left_img_right_text — Image left, text right

def add_left_img_right_text(prs, img_path, title, bullets, theme=THEME):
    slide = prs.slides.add_slide(prs.slide_layouts[6])
    # Solid background
    bg = slide.background
    fill = bg.fill
    fill.solid()
    fill.fore_color.rgb = theme["bg_color"]
    # Image on left (half width)
    slide.shapes.add_picture(img_path, 0, 0, Inches(6.5), prs.slide_height)
    # Title
    txBox = slide.shapes.add_textbox(Inches(7), Inches(0.5), Inches(5.8), Inches(1.2))
    tf = txBox.text_frame
    tf.word_wrap = True
    p = tf.paragraphs[0]
    p.text = title
    p.font.size = theme["title_size"]
    p.font.bold = True
    p.font.color.rgb = theme["title_color"]
    # Bullets
    txBox2 = slide.shapes.add_textbox(Inches(7), Inches(2), Inches(5.8), Inches(4.5))
    tf2 = txBox2.text_frame
    tf2.word_wrap = True
    for i, line in enumerate(bullets.split("\n")):
        line = line.strip().lstrip("•-").strip()
        if not line:
            continue
        p = tf2.paragraphs[0] if i == 0 else tf2.add_paragraph()
        p.text = f"  {line}"
        p.font.size = theme["body_size"]
        p.font.color.rgb = theme["text_color"]
        p.space_after = Pt(12)
    return slide

top_img_bottom_text — Image top, text bottom

def add_top_img_bottom_text(prs, img_path, title, bullets, theme=THEME):
    slide = prs.slides.add_slide(prs.slide_layouts[6])
    bg = slide.background
    bg.fill.solid()
    bg.fill.fore_color.rgb = theme["bg_color"]
    # Image on top (60% height)
    slide.shapes.add_picture(img_path, 0, 0, prs.slide_width, Inches(4.5))
    # Title
    txBox = slide.shapes.add_textbox(Inches(0.8), Inches(4.8), Inches(11.5), Inches(0.8))
    tf = txBox.text_frame
    tf.word_wrap = True
    p = tf.paragraphs[0]
    p.text = title
    p.font.size = Pt(28)
    p.font.bold = True
    p.font.color.rgb = theme["title_color"]
    # Bullets
    txBox2 = slide.shapes.add_textbox(Inches(0.8), Inches(5.7), Inches(11.5), Inches(1.5))
    tf2 = txBox2.text_frame
    tf2.word_wrap = True
    for i, line in enumerate(bullets.split("\n")):
        line = line.strip().lstrip("•-").strip()
        if not line:
            continue
        p = tf2.paragraphs[0] if i == 0 else tf2.add_paragraph()
        p.text = f"  {line}"
        p.font.size = Pt(16)
        p.font.color.rgb = theme["text_color"]
    return slide

center_text — Section divider / title-only

def add_center_text_slide(prs, img_path, title, subtitle="", theme=THEME):
    slide = prs.slides.add_slide(prs.slide_layouts[6])
    if img_path and os.path.exists(img_path):
        slide.shapes.add_picture(img_path, 0, 0, prs.slide_width, prs.slide_height)
        # Add overlay same as full_bg
    else:
        bg = slide.background
        bg.fill.solid()
        bg.fill.fore_color.rgb = theme["bg_color"]
    txBox = slide.shapes.add_textbox(Inches(2), Inches(2.8), Inches(9), Inches(2))
    tf = txBox.text_frame
    tf.word_wrap = True
    p = tf.paragraphs[0]
    p.text = title
    p.font.size = Pt(40)
    p.font.bold = True
    p.font.color.rgb = theme["title_color"]
    p.alignment = PP_ALIGN.CENTER
    if subtitle:
        p2 = tf.add_paragraph()
        p2.text = subtitle
        p2.font.size = Pt(20)
        p2.font.color.rgb = theme["text_color"]
        p2.alignment = PP_ALIGN.CENTER
    return slide

two_column — Two-column text (for data slides)

def add_two_column_slide(prs, img_path, title, bullets, theme=THEME):
    slide = prs.slides.add_slide(prs.slide_layouts[6])
    bg = slide.background
    bg.fill.solid()
    bg.fill.fore_color.rgb = theme["bg_color"]
    # Title
    txBox = slide.shapes.add_textbox(Inches(0.8), Inches(0.5), Inches(11.5), Inches(1))
    tf = txBox.text_frame
    p = tf.paragraphs[0]
    p.text = title
    p.font.size = theme["title_size"]
    p.font.bold = True
    p.font.color.rgb = theme["title_color"]
    # Split bullets into two columns
    lines = [l.strip().lstrip("•-").strip() for l in bullets.split("\n") if l.strip()]
    mid = len(lines) // 2
    left_lines, right_lines = lines[:mid], lines[mid:]
    for col_idx, (col_lines, left_pos) in enumerate([(left_lines, 0.8), (right_lines, 7.0)]):
        txBox = slide.shapes.add_textbox(Inches(left_pos), Inches(1.8), Inches(5.5), Inches(5))
        tf = txBox.text_frame
        tf.word_wrap = True
        for i, line in enumerate(col_lines):
            p = tf.paragraphs[0] if i == 0 else tf.add_paragraph()
            p.text = f"  {line}"
            p.font.size = theme["body_size"]
            p.font.color.rgb = theme["text_color"]
            p.space_after = Pt(10)
    if img_path and os.path.exists(img_path):
        slide.shapes.add_picture(img_path, Inches(9.5), Inches(4.5), Inches(3.5), Inches(2.5))
    return slide

5. Assembly Loop

import os

LAYOUT_MAP = {
    "full_bg": add_full_bg_slide,
    "left_img_right_text": add_left_img_right_text,
    "top_img_bottom_text": add_top_img_bottom_text,
    "center_text": add_center_text_slide,
    "two_column": add_two_column_slide,
}

for row in slides:
    no = row["slide_no"]
    layout = row.get("layout", "left_img_right_text")
    img_path = f"slide_{no}.png"
    title = row.get("title", "")
    bullets = row.get("bullet_points", "")

    fn = LAYOUT_MAP.get(layout, add_left_img_right_text)

    if layout in ("full_bg", "center_text"):
        fn(prs, img_path, title, subtitle=bullets, theme=THEME)
    else:
        fn(prs, img_path, title, bullets, theme=THEME)

prs.save("presentation.pptx")

6. Post-Assembly Checks

After saving, verify:

• File size is reasonable (images embedded increase size)
• Slide count matches storyboard row count
• Report the output filename and size to the user

Font Notes

• python-pptx embeds font name references, not font files
• Safe cross-platform fonts: Arial, Calibri, Helvetica
• For CJK content: specify "Microsoft YaHei", "Noto Sans CJK SC", or "PingFang SC"
• If the user specifies a custom font, check availability first

Tips

• Always use prs.slide_layouts[6] (blank layout) for full control
• Images should match the slide aspect ratio to avoid stretching
• For dark themes, use light text; for light themes, use dark text
• Keep the overlay opacity between 30%–50% for readability over images
• Speaker notes: slide.notes_slide.notes_text_frame.text = notes