From 0d2cbd50d58eb217311c8ceb2160bd1ce76acb8e Mon Sep 17 00:00:00 2001 From: Anders Jenbo Date: Fri, 4 Jul 2025 14:48:01 +0200 Subject: [PATCH] Fake mosaic transition (#516) --- .../legoomni/include/mxtransitionmanager.h | 4 +- .../src/common/mxtransitionmanager.cpp | 128 ++++++++++++++++++ LEGO1/omni/include/mxdisplaysurface.h | 3 + LEGO1/omni/src/video/mxdisplaysurface.cpp | 3 - 4 files changed, 134 insertions(+), 4 deletions(-) diff --git a/LEGO1/lego/legoomni/include/mxtransitionmanager.h b/LEGO1/lego/legoomni/include/mxtransitionmanager.h index dd9dc9ed..7c31daf7 100644 --- a/LEGO1/lego/legoomni/include/mxtransitionmanager.h +++ b/LEGO1/lego/legoomni/include/mxtransitionmanager.h @@ -48,7 +48,8 @@ class MxTransitionManager : public MxCore { e_mosaic, e_wipeDown, e_windows, - e_broken // Unknown what this is supposed to be, it locks the game up + e_broken, // Unknown what this is supposed to be, it locks the game up + e_fakeMosaic }; MxResult StartTransition(TransitionType p_animationType, MxS32 p_speed, MxBool p_doCopy, MxBool p_playMusicInAnim); @@ -68,6 +69,7 @@ class MxTransitionManager : public MxCore { void WipeDownTransition(); void WindowsTransition(); void BrokenTransition(); + void FakeMosaicTransition(); void SubmitCopyRect(LPDDSURFACEDESC p_ddsc); void SetupCopyRect(LPDDSURFACEDESC p_ddsc); diff --git a/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp b/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp index 6fd211c6..1987b6cd 100644 --- a/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp +++ b/LEGO1/lego/legoomni/src/common/mxtransitionmanager.cpp @@ -84,6 +84,9 @@ MxResult MxTransitionManager::Tickle() case e_broken: BrokenTransition(); break; + case e_fakeMosaic: + FakeMosaicTransition(); + break; } return SUCCESS; } @@ -613,3 +616,128 @@ void MxTransitionManager::configureMxTransitionManager(TransitionType p_transiti { g_transitionManagerConfig = p_transitionManagerConfig; } + +int g_colorOffset; +int GetColorIndexWithLocality(int p_col, int p_row) +{ + int islandX = p_col / 8; + int islandY = p_row / 8; // Dvide screen in 8x6 tiles + + int island = islandY * 8 + islandX; // tile id + + if (SDL_rand(3) > island / 8) { + return 6 + SDL_rand(2); // emulate sky + } + + if (SDL_rand(16) > 2) { + island += SDL_rand(3) - 1 + (SDL_rand(3) - 1) * 8; // blure tiles + } + + int hash = (island + g_colorOffset) * 2654435761u; + int scrambled = (hash >> 16) % 32; + + int finalIndex = scrambled + SDL_rand(3) - 1; + return finalIndex % 32; +} + +void MxTransitionManager::FakeMosaicTransition() +{ + if (m_animationTimer == 16) { + m_animationTimer = 0; + EndTransition(TRUE); + return; + } + + if (m_animationTimer == 0) { + g_colorOffset = SDL_rand(32); + for (MxS32 i = 0; i < 64; i++) { + m_columnOrder[i] = i; + } + for (MxS32 i = 0; i < 64; i++) { + MxS32 swap = SDL_rand(64); + std::swap(m_columnOrder[i], m_columnOrder[swap]); + } + for (MxS32 i = 0; i < 48; i++) { + m_randomShift[i] = SDL_rand(64); + } + } + + DDSURFACEDESC ddsd = {}; + ddsd.dwSize = sizeof(ddsd); + HRESULT res = m_ddSurface->Lock(NULL, &ddsd, DDLOCK_WAIT | DDLOCK_WRITEONLY, NULL); + if (res == DDERR_SURFACELOST) { + m_ddSurface->Restore(); + res = m_ddSurface->Lock(NULL, &ddsd, DDLOCK_WAIT | DDLOCK_WRITEONLY, NULL); + } + + if (res == DD_OK) { + SubmitCopyRect(&ddsd); + + static const MxU8 g_palette[32][3] = { + {0x00, 0x00, 0x00}, {0x12, 0x1e, 0x50}, {0x00, 0x22, 0x6c}, {0x14, 0x2d, 0x9f}, {0x0e, 0x36, 0xb0}, + {0x0e, 0x39, 0xd0}, {0x47, 0x96, 0xe2}, {0x79, 0xaa, 0xca}, {0xff, 0xff, 0xff}, {0xc9, 0xcd, 0xcb}, + {0xad, 0xad, 0xab}, {0xa6, 0x91, 0x8e}, {0xaf, 0x59, 0x49}, {0xc0, 0x00, 0x00}, {0xab, 0x18, 0x18}, + {0x61, 0x0c, 0x0c}, {0x04, 0x38, 0x12}, {0x2c, 0x67, 0x28}, {0x4a, 0xb4, 0x6b}, {0x94, 0xb7, 0x7c}, + {0xb6, 0xb9, 0x87}, {0x52, 0x4a, 0x67}, {0x87, 0x8d, 0x8a}, {0xa6, 0x91, 0x8e}, {0xf8, 0xee, 0xdc}, + {0xf4, 0xe2, 0xc3}, {0x87, 0x8d, 0x8a}, {0xba, 0x9f, 0x12}, {0xb5, 0x83, 0x00}, {0x6a, 0x44, 0x27}, + {0x36, 0x37, 0x34}, {0x2b, 0x23, 0x0f} + }; + + MxS32 bytesPerPixel = ddsd.ddpfPixelFormat.dwRGBBitCount / 8; + + for (MxS32 col = 0; col < 64; col++) { + if (m_animationTimer * 4 > m_columnOrder[col]) { + continue; + } + if (m_animationTimer * 4 + 3 < m_columnOrder[col]) { + continue; + } + + for (MxS32 row = 0; row < 48; row++) { + MxS32 xShift = 10 * ((m_randomShift[row] + col) % 64); + MxS32 yStart = 10 * row; + + int paletteIndex = GetColorIndexWithLocality(xShift / 10, row); + + const MxU8* color = g_palette[paletteIndex]; + + for (MxS32 y = 0; y < 10; y++) { + MxU8* dest = (MxU8*) ddsd.lpSurface + (yStart + y) * ddsd.lPitch + xShift * bytesPerPixel; + switch (bytesPerPixel) { + case 1: + memset(dest, paletteIndex, 10); + break; + case 2: { + MxU32 pixel = RGB555_CREATE(color[2], color[1], color[0]); + MxU16* p = (MxU16*) dest; + for (MxS32 i = 0; i < 10; i++) { + p[i] = pixel; + } + break; + } + default: { + MxU32 pixel = RGB8888_CREATE(color[2], color[1], color[0], 255); + MxU32* p = (MxU32*) dest; + for (MxS32 i = 0; i < 10; i++) { + p[i] = pixel; + } + break; + } + } + } + } + } + + SetupCopyRect(&ddsd); + m_ddSurface->Unlock(ddsd.lpSurface); + + if (VideoManager()->GetVideoParam().Flags().GetFlipSurfaces()) { + VideoManager() + ->GetDisplaySurface() + ->GetDirectDrawSurface1() + ->BltFast(0, 0, m_ddSurface, &g_fullScreenRect, DDBLTFAST_WAIT); + } + + m_animationTimer++; + } +} diff --git a/LEGO1/omni/include/mxdisplaysurface.h b/LEGO1/omni/include/mxdisplaysurface.h index 3a3dcd08..aa30b543 100644 --- a/LEGO1/omni/include/mxdisplaysurface.h +++ b/LEGO1/omni/include/mxdisplaysurface.h @@ -12,6 +12,9 @@ #include #endif +#define RGB555_CREATE(R, G, B) (((R) << 10) | (G) << 5 | (B) << 0) +#define RGB8888_CREATE(R, G, B, A) (((A) << 24) | ((R) << 16) | ((G) << 8) | (B)) + class MxBitmap; class MxPalette; diff --git a/LEGO1/omni/src/video/mxdisplaysurface.cpp b/LEGO1/omni/src/video/mxdisplaysurface.cpp index b10330f2..c07f475e 100644 --- a/LEGO1/omni/src/video/mxdisplaysurface.cpp +++ b/LEGO1/omni/src/video/mxdisplaysurface.cpp @@ -18,9 +18,6 @@ DECOMP_SIZE_ASSERT(MxDisplaySurface, 0xac); -#define RGB555_CREATE(R, G, B) (((R) << 10) | (G) << 5 | (B) << 0) -#define RGB8888_CREATE(R, G, B, A) (((A) << 24) | ((R) << 16) | ((G) << 8) | (B)) - // GLOBAL: LEGO1 0x1010215c MxU32 g_unk0x1010215c = 0;