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sdl3

SDL3 API reference and documentation. Use when working with SDL3, SDL3_image, SDL3_mixer, SDL3_ttf, or SDL3_net code. Provides function signatures, parameters, return values, remarks, code examples, and related functions.

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ilmenit/AltirraSDL
See how to install

Files included (200)

  • SKILL.md2.6 KB
  • docs/SDL3_image/CategoryAPI.md9.6 KB
  • docs/SDL3_image/CategoryAPICategory.md246 B
  • docs/SDL3_image/CategoryAPIDatatype.md348 B
  • docs/SDL3_image/CategoryAPIEnum.md290 B
  • docs/SDL3_image/CategoryAPIEnumerators.md439 B
  • docs/SDL3_image/CategoryAPIFunction.md4.9 KB
  • docs/SDL3_image/CategoryAPIMacro.md4.4 KB
  • docs/SDL3_image/CategoryAPIStruct.md266 B
  • docs/SDL3_image/CategorySDLImage.md6.3 KB
  • docs/SDL3_image/FrontPage.md1.8 KB
  • docs/SDL3_image/IMG_AddAnimationEncoderFrame.md1.2 KB
  • docs/SDL3_image/IMG_AddAnimationFrame.md1.2 KB
  • docs/SDL3_image/IMG_Animation.md632 B
  • docs/SDL3_image/IMG_AnimationDecoder.md357 B
  • docs/SDL3_image/IMG_AnimationDecoderStatus.md817 B
  • docs/SDL3_image/IMG_AnimationEncoder.md359 B
  • docs/SDL3_image/IMG_AnimationStream.md367 B
  • docs/SDL3_image/IMG_CloseAnimationDecoder.md1002 B
  • docs/SDL3_image/IMG_CloseAnimationEncoder.md1002 B
  • docs/SDL3_image/IMG_CloseAnimationStream.md987 B
  • docs/SDL3_image/IMG_CreateAnimatedCursor.md978 B
  • docs/SDL3_image/IMG_CreateAnimationDecoder_IO.md1.5 KB
  • docs/SDL3_image/IMG_CreateAnimationDecoder.md1.3 KB
  • docs/SDL3_image/IMG_CreateAnimationDecoderWithProperties.md3.7 KB
  • docs/SDL3_image/IMG_CreateAnimationEncoder_IO.md1.5 KB
  • docs/SDL3_image/IMG_CreateAnimationEncoder.md1.2 KB
  • docs/SDL3_image/IMG_CreateAnimationEncoderWithProperties.md4.2 KB
  • docs/SDL3_image/IMG_CreateAnimationStream_IO.md1.4 KB
  • docs/SDL3_image/IMG_CreateAnimationStream.md1.1 KB
  • docs/SDL3_image/IMG_CreateAnimationStreamWithProperties.md3.7 KB
  • docs/SDL3_image/IMG_DECODER_STATUS_COMPLETE.md192 B
  • docs/SDL3_image/IMG_DECODER_STATUS_FAILED.md190 B
  • docs/SDL3_image/IMG_DECODER_STATUS_INVALID.md191 B
  • docs/SDL3_image/IMG_DECODER_STATUS_OK.md186 B
  • docs/SDL3_image/IMG_FreeAnimation.md1.0 KB
  • docs/SDL3_image/IMG_GetAnimationDecoderFrame.md2.0 KB
  • docs/SDL3_image/IMG_GetAnimationDecoderMetadata.md1.3 KB
  • docs/SDL3_image/IMG_GetAnimationDecoderPresentationTimestampMS.md931 B
  • docs/SDL3_image/IMG_GetAnimationDecoderProperties.md1.9 KB
  • docs/SDL3_image/IMG_GetAnimationDecoderStatus.md896 B
  • docs/SDL3_image/IMG_GetClipboardImage.md627 B
  • docs/SDL3_image/IMG_GetNextAnimationDecoderFrame.md1.3 KB
  • docs/SDL3_image/IMG_isANI.md1.8 KB
  • docs/SDL3_image/IMG_isAVIF.md1.8 KB
  • docs/SDL3_image/IMG_isBMP.md1.8 KB
  • docs/SDL3_image/IMG_isCUR.md1.8 KB
  • docs/SDL3_image/IMG_isGIF.md1.8 KB
  • docs/SDL3_image/IMG_isICO.md1.8 KB
  • docs/SDL3_image/IMG_isJPG.md1.8 KB
  • docs/SDL3_image/IMG_isJXL.md1.8 KB
  • docs/SDL3_image/IMG_isLBM.md1.8 KB
  • docs/SDL3_image/IMG_isPCX.md1.8 KB
  • docs/SDL3_image/IMG_isPNG.md1.8 KB
  • docs/SDL3_image/IMG_isPNM.md1.8 KB
  • docs/SDL3_image/IMG_isQOI.md1.8 KB
  • docs/SDL3_image/IMG_isSVG.md1.8 KB
  • docs/SDL3_image/IMG_isTIF.md1.8 KB
  • docs/SDL3_image/IMG_isWEBP.md1.8 KB
  • docs/SDL3_image/IMG_isXCF.md1.8 KB
  • docs/SDL3_image/IMG_isXPM.md1.8 KB
  • docs/SDL3_image/IMG_isXV.md1.8 KB
  • docs/SDL3_image/IMG_Load_IO.md2.6 KB
  • docs/SDL3_image/IMG_Load.md2.1 KB
  • docs/SDL3_image/IMG_LoadANIAnimation_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadAnimation_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadAnimation.md1.2 KB
  • docs/SDL3_image/IMG_LoadAnimationTyped_IO.md2.0 KB
  • docs/SDL3_image/IMG_LoadAPNGAnimation_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadAVIF_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadAVIFAnimation_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadBMP_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadCUR_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadGIF_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadGIFAnimation_IO.md1.3 KB
  • docs/SDL3_image/IMG_LoadGPUTexture_IO.md2.5 KB
  • docs/SDL3_image/IMG_LoadGPUTexture.md1.9 KB
  • docs/SDL3_image/IMG_LoadGPUTextureTyped_IO.md2.9 KB
  • docs/SDL3_image/IMG_LoadICO_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadJPG_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadJXL_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadLBM_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadPCX_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadPNG_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadPNM_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadQOI_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadSizedSVG_IO.md1.2 KB
  • docs/SDL3_image/IMG_LoadSVG_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadTexture_IO.md2.3 KB
  • docs/SDL3_image/IMG_LoadTexture.md1.8 KB
  • docs/SDL3_image/IMG_LoadTextureTyped_IO.md2.8 KB
  • docs/SDL3_image/IMG_LoadTGA_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadTIF_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadTyped_IO.md3.1 KB
  • docs/SDL3_image/IMG_LoadWEBP_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadWEBPAnimation_IO.md1.3 KB
  • docs/SDL3_image/IMG_LoadXCF_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadXPM_IO.md1.5 KB
  • docs/SDL3_image/IMG_LoadXV_IO.md1.5 KB
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_AVIF_ALLOW_INCREMENTAL_BOOLEAN.md257 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_AVIF_ALLOW_PROGRESSIVE_BOOLEAN.md257 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_AVIF_MAX_THREADS_NUMBER.md250 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_FILENAME_STRING.md242 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_GIF_NUM_COLORS_NUMBER.md248 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_GIF_TRANSPARENT_COLOR_INDEX_NUMBER.md261 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_IOSTREAM_AUTOCLOSE_BOOLEAN.md253 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_IOSTREAM_POINTER.md243 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_TIMEBASE_DENOMINATOR_NUMBER.md254 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_TIMEBASE_NUMERATOR_NUMBER.md252 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_CREATE_TYPE_STRING.md238 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_METADATA_FRAME_COUNT_NUMBER.md247 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_DECODER_METADATA_LOOP_COUNT_NUMBER.md246 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_AVIF_KEYFRAME_INTERVAL_NUMBER.md256 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_AVIF_MAX_THREADS_NUMBER.md250 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_FILENAME_STRING.md242 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_GIF_USE_LUT_BOOLEAN.md246 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_IOSTREAM_AUTOCLOSE_BOOLEAN.md253 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_IOSTREAM_POINTER.md243 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_QUALITY_NUMBER.md241 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_TIMEBASE_DENOMINATOR_NUMBER.md254 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_TIMEBASE_NUMERATOR_NUMBER.md252 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_ENCODER_CREATE_TYPE_STRING.md238 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_FILENAME_STRING.md239 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_IOSTREAM_AUTOCLOSE_BOOLEAN.md250 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_IOSTREAM_POINTER.md240 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_QUALITY_NUMBER.md238 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_TIMEBASE_DENOMINATOR_NUMBER.md251 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_TIMEBASE_NUMERATOR_NUMBER.md249 B
  • docs/SDL3_image/IMG_PROP_ANIMATION_STREAM_CREATE_TYPE_STRING.md235 B
  • docs/SDL3_image/IMG_PROP_METADATA_AUTHOR_STRING.md210 B
  • docs/SDL3_image/IMG_PROP_METADATA_COPYRIGHT_STRING.md213 B
  • docs/SDL3_image/IMG_PROP_METADATA_CREATION_TIME_STRING.md217 B
  • docs/SDL3_image/IMG_PROP_METADATA_DESCRIPTION_STRING.md215 B
  • docs/SDL3_image/IMG_PROP_METADATA_FRAME_COUNT_NUMBER.md215 B
  • docs/SDL3_image/IMG_PROP_METADATA_IGNORE_PROPS_BOOLEAN.md217 B
  • docs/SDL3_image/IMG_PROP_METADATA_LOOP_COUNT_NUMBER.md214 B
  • docs/SDL3_image/IMG_PROP_METADATA_TITLE_STRING.md209 B
  • docs/SDL3_image/IMG_ReadXPMFromArray.md1007 B
  • docs/SDL3_image/IMG_ReadXPMFromArrayToRGB888.md985 B
  • docs/SDL3_image/IMG_ResetAnimationDecoder.md1.2 KB
  • docs/SDL3_image/IMG_Save.md1.1 KB
  • docs/SDL3_image/IMG_SaveANIAnimation_IO.md1.3 KB
  • docs/SDL3_image/IMG_SaveAnimation.md1.1 KB
  • docs/SDL3_image/IMG_SaveAnimationTyped_IO.md1.5 KB
  • docs/SDL3_image/IMG_SaveAPNGAnimation_IO.md1.3 KB
  • docs/SDL3_image/IMG_SaveAVIF_IO.md1.2 KB
  • docs/SDL3_image/IMG_SaveAVIF.md914 B
  • docs/SDL3_image/IMG_SaveAVIFAnimation_IO.md1.4 KB
  • docs/SDL3_image/IMG_SaveBMP_IO.md1.1 KB
  • docs/SDL3_image/IMG_SaveBMP.md809 B
  • docs/SDL3_image/IMG_SaveCUR_IO.md1.1 KB
  • docs/SDL3_image/IMG_SaveCUR.md809 B
  • docs/SDL3_image/IMG_SaveGIF_IO.md1.1 KB
  • docs/SDL3_image/IMG_SaveGIF.md809 B
  • docs/SDL3_image/IMG_SaveGIFAnimation_IO.md1.3 KB
  • docs/SDL3_image/IMG_SaveICO_IO.md1.1 KB
  • docs/SDL3_image/IMG_SaveICO.md809 B
  • docs/SDL3_image/IMG_SaveJPG_IO.md1.2 KB
  • docs/SDL3_image/IMG_SaveJPG.md928 B
  • docs/SDL3_image/IMG_SavePNG_IO.md1.1 KB
  • docs/SDL3_image/IMG_SavePNG.md809 B
  • docs/SDL3_image/IMG_SaveTGA_IO.md1.1 KB
  • docs/SDL3_image/IMG_SaveTGA.md809 B
  • docs/SDL3_image/IMG_SaveTyped_IO.md1.6 KB
  • docs/SDL3_image/IMG_SaveWEBP_IO.md1.3 KB
  • docs/SDL3_image/IMG_SaveWEBP.md1.1 KB
  • docs/SDL3_image/IMG_SaveWEBPAnimation_IO.md1.5 KB
  • docs/SDL3_image/IMG_Version.md461 B
  • docs/SDL3_image/QuickReference.md24.8 KB
  • docs/SDL3_image/QuickReferenceNoUnicode.md24.1 KB
  • docs/SDL3_image/SDL_IMAGE_MAJOR_VERSION.md344 B
  • docs/SDL3_image/SDL_IMAGE_VERSION_ATLEAST.md595 B
  • docs/SDL3_image/SDL_IMAGE_VERSION.md444 B
  • docs/SDL3_image/Undocumented.md81 B
  • docs/SDL3_mixer/CategoryAPI.md7.4 KB
  • docs/SDL3_mixer/CategoryAPICategory.md246 B
  • docs/SDL3_mixer/CategoryAPIDatatype.md548 B
  • docs/SDL3_mixer/CategoryAPIFunction.md4.3 KB
  • docs/SDL3_mixer/CategoryAPIMacro.md2.9 KB
  • docs/SDL3_mixer/CategoryAPIStruct.md272 B
  • docs/SDL3_mixer/CategorySDLMixer.md11.4 KB
  • docs/SDL3_mixer/FrontPage.md1.8 KB
  • docs/SDL3_mixer/INTRO-androidstudio.md407 B
  • docs/SDL3_mixer/INTRO-cmake.md1.7 KB
  • docs/SDL3_mixer/INTRO-emscripten.md1.6 KB
  • docs/SDL3_mixer/INTRO-visualstudio.md1.5 KB
  • docs/SDL3_mixer/INTRO-xcode.md1.5 KB
  • docs/SDL3_mixer/MIX_Audio.md900 B
  • docs/SDL3_mixer/MIX_AudioDecoder.md859 B
  • docs/SDL3_mixer/MIX_AudioFramesToMS.md1.2 KB
  • docs/SDL3_mixer/MIX_AudioMSToFrames.md1.0 KB
  • docs/SDL3_mixer/MIX_CreateAudioDecoder_IO.md2.0 KB
  • docs/SDL3_mixer/MIX_CreateAudioDecoder.md1.8 KB
  • docs/SDL3_mixer/MIX_CreateGroup.md1.6 KB
  • docs/SDL3_mixer/MIX_CreateMixer.md1.5 KB
  • docs/SDL3_mixer/MIX_CreateMixerDevice.md2.4 KB
  • docs/SDL3_mixer/MIX_CreateSineWaveAudio.md1.9 KB
  • docs/SDL3_mixer/MIX_CreateTrack.md1.2 KB
  • docs/SDL3_mixer/MIX_DecodeAudio.md1.3 KB
  • docs/SDL3_mixer/MIX_DestroyAudio.md1.1 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

SDL3 Documentation Skill

You have access to the complete SDL3 wiki (4,890 API docs). Use progressive disclosure — start narrow, expand only as needed.

Lookup strategy (follow in order)

1. Specific function/type query → direct lookup

If the user asks about a known symbol (e.g. SDL_CreateWindow, IMG_Load):

  1. Read lookup.md (in this skill directory) — find the symbol's category and one-line description
  2. Read the full doc: docs/SDL3/<SymbolName>.md (or docs/SDL3_image/, SDL3_mixer/, etc.)
  3. Present: signature, parameters, return value, key remarks, code example if available, see-also links

2. Topic/domain query → category drill-down

If the user asks about a topic (e.g. "how does audio work", "window management"):

  1. Read index.md (in this skill directory) — find the matching category and its file path
  2. Read the category file (e.g. docs/SDL3/CategoryAudio.md) — get the overview + full symbol list
  3. Summarize the category, highlight the most relevant functions
  4. Only read individual function docs if the user wants specifics

3. Fuzzy/unknown query → search

If you can't find it in lookup.md or index.md:

  1. Grep for the term across docs/ — check function names, descriptions
  2. Glob for docs/SDL3/*<term>*.md to find matching files
  3. Read the best match

File layout

.claude/skills/sdl3/
├── SKILL.md          ← you are here (always loaded)
├── index.md          ← master topic→category map (read first for topic queries)
├── lookup.md         ← symbol→category+description table (read first for function queries)
└── docs/
    ├── SDL3/         ← 4,282 individual API + category docs
    ├── SDL3_image/   ← image loading library
    ├── SDL3_mixer/   ← audio mixing library
    ├── SDL3_ttf/     ← font rendering library
    └── SDL3_net/     ← networking library

Response guidelines

  • Lead with the function signature in a C code block
  • Include parameter table and return value
  • Mention thread safety and version if relevant
  • Include code examples when available — these are high value
  • Link to related functions the user likely needs next
  • For broad topics, give an overview with the 3-5 most important functions before listing everything

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The English summary is being prepared. Showing the original description.

ilmenit/AltirraSDL66Updated Oct 23, 2026

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