149 lines
4 KiB
PHP
149 lines
4 KiB
PHP
; Windowless renderer used by EblanStudio. Same Render3DScene and overlays as game.
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; Fixed wire layout is mirrored by editor/src/preview_protocol.h.
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.data
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previewHandle dd 0
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previewMemory dd 0
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previewParent dd 0
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previewTextureRevision dd -1
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.code
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TryEnginePreview PROC uses ebx ecx edx esi edi
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mov esi, OFFSET startupMapPath
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mov edi, OFFSET previewPrefix
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mov ecx, 10
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repe cmpsb
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jne preview_not_requested
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invoke OpenFileMappingA, 6, 0, esi ; FILE_MAP_READ | FILE_MAP_WRITE
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test eax, eax
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jz preview_exit_error
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mov previewHandle, eax
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invoke MapViewOfFile, eax, 6, 0, 0, 1357792
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test eax, eax
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jz preview_exit_error
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mov previewMemory, eax
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mov ebx, eax
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cmp DWORD PTR [ebx], 56504245h
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jne preview_exit_error
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cmp DWORD PTR [ebx+4], 1
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jne preview_exit_error
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invoke OpenProcess, 00100000h, 0, DWORD PTR [ebx+12] ; SYNCHRONIZE
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test eax, eax
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jz preview_exit_error
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mov previewParent, eax
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call InitMathTables
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call GenerateDefaultTextures
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preview_wait:
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invoke WaitForSingleObject, previewParent, 0
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test eax, eax
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jz preview_exit_ok
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mov ebx, previewMemory
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cmp DWORD PTR [ebx+8], 3
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je preview_exit_ok
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cmp DWORD PTR [ebx+8], 1
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je preview_render
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invoke Sleep, 1
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jmp preview_wait
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preview_render:
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; Treat IPC as untrusted: bounds before touching engine buffers.
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mov eax, [ebx+16]
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cmp eax, 2048
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jae preview_exit_error
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mov playerX, eax
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mov eax, [ebx+20]
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cmp eax, 2048
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jae preview_exit_error
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mov playerY, eax
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mov eax, [ebx+24]
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and eax, 511
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mov playerAngle, eax
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mov eax, [ebx+28]
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mov mapCeilingColor, eax
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mov eax, [ebx+32]
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mov mapFloorColor, eax
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mov eax, [ebx+36]
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cmp eax, MAX_SPRITES
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ja preview_exit_error
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mov spriteCount, eax
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lea esi, [ebx+128]
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mov edi, OFFSET gameMap
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mov ecx, 1024/4
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rep movsd
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push esi
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mov esi, OFFSET gameMap
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mov ecx, MAP_SIZE
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preview_cell_check:
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lodsb
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cmp al, 15
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ja preview_exit_error
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loop preview_cell_check
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pop esi
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mov edi, OFFSET spriteList
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mov ecx, 32*sizeof SpriteStruct/4
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rep movsd
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; Validate every sprite, including unsaved inspector edits.
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mov esi, OFFSET spriteList
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mov ecx, spriteCount
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preview_sprite_check:
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test ecx, ecx
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jz preview_textures
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cmp DWORD PTR [esi].SpriteStruct.textureId, MAX_TEXTURES
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jae preview_exit_error
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cmp DWORD PTR [esi].SpriteStruct.x, 2048
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jae preview_exit_error
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cmp DWORD PTR [esi].SpriteStruct.y, 2048
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jae preview_exit_error
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cmp DWORD PTR [esi].SpriteStruct.scale, 1048576
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ja preview_exit_error
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add esi, sizeof SpriteStruct
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dec ecx
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jmp preview_sprite_check
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preview_textures:
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mov eax, [ebx+48]
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cmp eax, previewTextureRevision
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je preview_scene
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mov previewTextureRevision, eax
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lea esi, [ebx+2016]
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mov edi, OFFSET textureBuffer
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mov ecx, MAX_TEXTURES*TEX_SIZE_BYTES/4
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rep movsd
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preview_scene:
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call Render3DScene
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mov ebx, previewMemory
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cmp DWORD PTR [ebx+40], 0
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je preview_copy_frame
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mov cutsceneSubtitle, -1
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cmp BYTE PTR [ebx+1920], 0
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je preview_overlay
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lea esi, [ebx+1920]
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mov edi, OFFSET cutsceneStrings
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mov ecx, 96/4
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rep movsd
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mov BYTE PTR [cutsceneStrings+95], 0
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mov cutsceneStringCount, 1
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mov cutsceneSubtitle, 0
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preview_overlay:
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call RenderCutsceneOverlay
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mov ebx, previewMemory
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mov eax, [ebx+44]
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cmp eax, 16
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ja preview_exit_error
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mov cutsceneFade, eax
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call ApplyCutsceneFade
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preview_copy_frame:
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mov esi, OFFSET screenBuffer
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mov ebx, previewMemory
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lea edi, [ebx+1050592]
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mov ecx, FRAME_BUFFER_SIZE/4
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rep movsd
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mov eax, 2
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xchg eax, [ebx+8] ; Publish complete frame (full memory barrier).
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jmp preview_wait
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preview_exit_ok:
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invoke UnmapViewOfFile, previewMemory
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invoke CloseHandle, previewParent
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invoke CloseHandle, previewHandle
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invoke ExitProcess, 0
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preview_exit_error:
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invoke ExitProcess, 2
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preview_not_requested:
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ret
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TryEnginePreview ENDP
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