feat(screenshot): Add threaded JPEG/PNG screenshots without game stalls#1785

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bobtista wants to merge 37 commits into

TheSuperHackers:mainfrom

bobtista:bobtista/compressed-screenshot-f11

Commits on Jul 15, 2026

build(screenshot): Add stb_image_write library via FetchContent
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feat(screenshot): Add threaded JPEG/PNG screenshots without game stalls
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tweak(screenshot): Name files by timestamp so JPG and PNG sort together
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tweak(screenshot): Replicate to Generals
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fix(stb): Create stb target on both vcpkg and FetchContent paths
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fix(screenshot): Use engine logging and match codebase style
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fix(screenshot): Replicate to Generals
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build(stb): use TheSuperHackers comment keyword format
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style(screenshot): drop unused leafname from thread data
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style(screenshot): Replicate to Generals
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chore(screenshot): Remove unused W3DScreenshot.h include from W3DDisplay
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unify(screenshot): Move W3DScreenshot to Core
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fix(screenshot): Convert 16 bit back buffers to 24 bit color
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refactor(screenshot): Pass JPEG quality from the message handler
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feat(screenshot): Save screenshots into a Screenshots subfolder
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refactor(screenshot): Release image buffer in thread data destructor and return write result
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tweak(screenshot): Look up file extension from format array with completeness check
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tweak(screenshot): Cap JPEG quality at 95 and make getter const
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style(screenshot): Remove key mappings from message comments and update stb.cmake comment
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style(screenshot): Remove TheSuperHackers comment prefix from stb.cmake
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chore(screenshot): Remove unify script entry for the new stb_image_write_impl file
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refactor(screenshot): Move pixel conversion and file operations to the screenshot thread
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style(screenshot): Add TheSuperHackers comments to new GlobalData and MessageStream members
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refactor(screenshot): Assemble the screenshot directory path on the screenshot thread
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style(screenshot): Simplify TheSuperHackers comments on new GlobalData and MessageStream members
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style(screenshot): Fix comment keyword and wording per review
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refactor(screenshot): Use endian-safe shifts for 32 bit pixel conversion and C++ casts
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style(screenshot): Change quality cap comment keyword to @info
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style(screenshot): Remove redundant masks and add rgb comments to the 16 bit conversion
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fix(screenshot): Show the screenshot success message after the file is written
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build(screenshot): Add InterlockedExchangePointer adapter for VC6
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tweak(screenshot): Clamp the JPEG quality to 80-95
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build(screenshot): Find Stb in module mode so the vcpkg provided package is used
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refactor(screenshot): Copy the locked surface with a single memcpy and handle the row pitch on the screenshot thread
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tweak(screenshot): Lower the JPEG quality clamp to 50-95
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refactor(screenshot): Rename quality key to JpegQuality, share the default constant, and simplify pitch handling
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fix(screenshot): Queue completion messages, write JpegQuality on options save, and reuse the default quality constant
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