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updated to fullscreen view ppt

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DigiServer Developer
2025-11-24 22:28:44 +02:00
parent 561b364022
commit 69562fbf22
1 changed files with 97 additions and 8 deletions
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105
app/blueprints/content.py
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@@ -526,17 +526,16 @@ def process_presentation_file(filepath: str, filename: str) -> tuple[bool, str]:
temp_ppt = temp_path / filename
shutil.copy2(filepath, temp_ppt)
# Convert presentation to images (PNG format)
# Using LibreOffice headless mode with custom resolution
# Convert presentation to PDF first (for better quality)
convert_cmd = [
libreoffice_cmd,
'--headless',
'--convert-to', 'png',
'--convert-to', 'pdf',
'--outdir', str(temp_path),
str(temp_ppt)
]
log_action('info', f'Converting presentation to images: {filename}')
log_action('info', f'Converting presentation to PDF: {filename}')
try:
result = subprocess.run(
@@ -550,8 +549,40 @@ def process_presentation_file(filepath: str, filename: str) -> tuple[bool, str]:
log_action('error', f'LibreOffice conversion failed: {result.stderr}')
return True, "Presentation accepted without conversion (conversion failed)"
# Find generated PDF file
pdf_files = list(temp_path.glob('*.pdf'))
if not pdf_files:
log_action('warning', f'No PDF generated from presentation: {filename}')
return True, "Presentation accepted without conversion"
pdf_file = pdf_files[0]
log_action('info', f'Converting PDF to images at Full HD resolution: {pdf_file.name}')
# Convert PDF to images using pdftoppm at Full HD resolution (1920x1080)
# Calculate DPI for Full HD output (assuming standard presentation is 10x7.5 inches)
# 1920/10 = 192 DPI for width, use 192 DPI for best quality
pdftoppm_cmd = [
'pdftoppm',
'-png',
'-r', '300', # High DPI for quality
'-scale-to', '1920', # Scale width to 1920px
str(pdf_file),
str(temp_path / 'slide')
]
result = subprocess.run(
pdftoppm_cmd,
capture_output=True,
text=True,
timeout=120
)
if result.returncode != 0:
log_action('error', f'pdftoppm conversion failed: {result.stderr}')
return True, "Presentation accepted without conversion (image conversion failed)"
# Find generated PNG files
png_files = sorted(temp_path.glob('*.png'))
png_files = sorted(temp_path.glob('slide-*.png'))
if not png_files:
log_action('warning', f'No images generated from presentation: {filename}')
@@ -561,7 +592,7 @@ def process_presentation_file(filepath: str, filename: str) -> tuple[bool, str]:
upload_folder = current_app.config['UPLOAD_FOLDER']
base_name = os.path.splitext(filename)[0]
# Move converted images to upload folder
# Move converted images to upload folder and resize to exact Full HD
slide_count = 0
for idx, png_file in enumerate(png_files, start=1):
# Create descriptive filename
@@ -570,8 +601,8 @@ def process_presentation_file(filepath: str, filename: str) -> tuple[bool, str]:
shutil.move(str(png_file), destination)
# Optimize the image to Full HD (1920x1080)
optimize_image_to_fullhd(destination)
# Resize to exact Full HD dimensions (1920x1080) maintaining aspect ratio
resize_image_to_fullhd(destination)
slide_count += 1
@@ -616,6 +647,64 @@ def create_fullhd_image(img):
return fullhd_img
def resize_image_to_fullhd(filepath: str) -> bool:
"""Resize image to exactly Full HD (1920x1080) maintaining aspect ratio with centered crop or padding."""
try:
from PIL import Image
img = Image.open(filepath)
target_width = 1920
target_height = 1080
# Calculate aspect ratios
img_aspect = img.width / img.height
target_aspect = target_width / target_height
if abs(img_aspect - target_aspect) < 0.01:
# Aspect ratio is very close, just resize
img_resized = img.resize((target_width, target_height), Image.Resampling.LANCZOS)
elif img_aspect > target_aspect:
# Image is wider than target, fit height and crop/pad width
new_height = target_height
new_width = int(target_height * img_aspect)
img_resized = img.resize((new_width, new_height), Image.Resampling.LANCZOS)
# Crop to center if wider
if new_width > target_width:
left = (new_width - target_width) // 2
img_resized = img_resized.crop((left, 0, left + target_width, target_height))
else:
# Pad with white if narrower
result = Image.new('RGB', (target_width, target_height), (255, 255, 255))
offset = (target_width - new_width) // 2
result.paste(img_resized, (offset, 0))
img_resized = result
else:
# Image is taller than target, fit width and crop/pad height
new_width = target_width
new_height = int(target_width / img_aspect)
img_resized = img.resize((new_width, new_height), Image.Resampling.LANCZOS)
# Crop to center if taller
if new_height > target_height:
top = (new_height - target_height) // 2
img_resized = img_resized.crop((0, top, target_width, top + target_height))
else:
# Pad with white if shorter
result = Image.new('RGB', (target_width, target_height), (255, 255, 255))
offset = (target_height - new_height) // 2
result.paste(img_resized, (0, offset))
img_resized = result
# Save optimized image
img_resized.save(filepath, 'PNG', optimize=True, quality=95)
return True
except Exception as e:
log_action('error', f'Image resize error: {str(e)}')
return False
def optimize_image_to_fullhd(filepath: str) -> bool:
"""Optimize and resize image file to Full HD (1920x1080) maintaining aspect ratio."""
try: