![]() ![]() This format was introduced with DirectX 7.0. The file extension for this data format is '.dds'. This makes the format useful for storing graphical textures and cubic environment maps as a data file, both compressed and uncompressed. The DirectDraw Surface container file format (uses the filename extension DDS), is a Microsoft format for storing data compressed with the previously proprietary S3 Texture Compression (S3TC) algorithm, which can be decompressed in hardware by GPUs. They are copies of their respective PNG images except are stored in the JPEG image format. png Here image files 1.png, 2.png, etc., are left untouched and files 1.jpg, 2.jpg, etc., are created. OpenGL drivers write the pre-compressed texture data directly to VRAM Finally, we convert all our PNG images in a folder to the JPEG format: magick mogrify -format jpg. Load DDS image into RAM (using 8MB ram)Ģ. OpenGL drivers write the texture to VRAMġ. OpenGL drivers compress data into DXT1 or DXT5 using up another 8MB RAMĦ. Flip the image vertically on CPU (using another 32MB of RAM).ĥ. Decompress PNG into RAM (using 32MB of RAM)ģ. In a terminal, just go:īefore, the way a texture image was loaded was this (for a 4k/UHD 3840x2160 image):Ģ. dds format with either DXT1 or DXT5 compression. Default is white.While you can still use JPG and PNG images, those formats are STRONGLY discouraged. use -background for specifying the color that will be applied to the canvas, including all transparent and semi-transparent zones.The original image is cropped or the background is extended to fit the -extent parameter.Modify the canvas size magick convert source.png -background none -gravity center -extent 1024x1024 result.png Split an image in vertical slices magick convert source.png -crop 300 +repage result.png removing -quality reduces the pdf size.remove -resize to use the original images.Source Convert images to PDF magick convert -resize 2048x *.png -quality 100 destination.pdf Extra high quality: use -density 600 and -resize 8192x.source.pdf to convert only the specified image.remove -append to extract each page separately.compose and -composite reference | source Convert a PDF file to PNG magick convert -density 150 -antialias source.pdf -append -resize 1024x -quality 100 destination.png Take the first image ‘destination’ and overlay the second ‘source’ image according to the current -compose setting. composite: Perform alpha composition on two images and an optional mask. If the channel specified does not exist in the source image, (which can only happen for methods, ‘copy-opacity’ or ‘copy-black’) then it is assumed that the source image is a special grayscale channel image of the values that is to be copied. compose copy-*: Copy the specified channel (Red, Green, Blue, Cyan, Magenta, Yellow, Black, or Opacity) in the source image to the same channel in the destination image. If source_alpha.png doesn’t have an alpha channel then the grayscale values are copied. Otherwise, the locations are controlled according to -gravity and -geometry settings. Source.png and source_alpha.png should have the same size. Source Copy the Alpha channel or grayscale from an image to another magick convert source.png source_alpha.png -compose copy-opacity -composite PNG32:composed.png alpha reference | source Remove the Alpha channel from an image magick convert source.png -alpha off destination.png alpha extract: Copies the alpha channel values into all the color channels and turns ‘Off’ the the image’s transparency, so as to generate a grayscale mask of the image’s shape. Extract the Alpha channel from an image magick convert source.png -set colorspace RGB -alpha extract source_alpha.png *.dds are the source images, png is the target format. via ImageMagick before being fed to Compressonator to be converted to DDS. Source Batch-convert many images to a different format magick mogrify -format png *.dds Fix exporting a phyre engine image as PNG in the Basic Image Viewer (Trails. 0 is the composed image, 1 is the first layer, 2 the second layer, etc. Writes a sequence of files named destination-0.png, destination-1.png, destination-2.png, etc. Extract DDS layers to individual PNGs magick convert source.psd -set dispose Background -coalesce destination.png Convert a DDS texture to PNG magick convert source.dds destination.png IMPORTANT: the order of the parameters does matter! Operations are applied in order. My own quick reference for using ImageMagick in specific tasks. ![]()
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