diff options
Diffstat (limited to 'engines/wintermute/base/gfx/osystem/base_surface_osystem.cpp')
-rw-r--r-- | engines/wintermute/base/gfx/osystem/base_surface_osystem.cpp | 49 |
1 files changed, 31 insertions, 18 deletions
diff --git a/engines/wintermute/base/gfx/osystem/base_surface_osystem.cpp b/engines/wintermute/base/gfx/osystem/base_surface_osystem.cpp index d4c5905c4b..aed0129b3a 100644 --- a/engines/wintermute/base/gfx/osystem/base_surface_osystem.cpp +++ b/engines/wintermute/base/gfx/osystem/base_surface_osystem.cpp @@ -48,7 +48,7 @@ namespace Wintermute { BaseSurfaceOSystem::BaseSurfaceOSystem(BaseGame *inGame) : BaseSurface(inGame) { _surface = new Graphics::Surface(); _alphaMask = nullptr; - _hasAlpha = true; + _alphaType = ALPHA_FULL; _lockPixels = nullptr; _lockPitch = 0; _loaded = false; @@ -71,22 +71,37 @@ BaseSurfaceOSystem::~BaseSurfaceOSystem() { renderer->invalidateTicketsFromSurface(this); } -bool hasTransparency(Graphics::Surface *surf) { +AlphaType hasTransparencyType(const Graphics::Surface *surf) { if (surf->format.bytesPerPixel != 4) { - warning("hasTransparency:: non 32 bpp surface passed as argument"); - return false; + warning("hasTransparencyType:: non 32 bpp surface passed as argument"); + return ALPHA_OPAQUE; } uint8 r, g, b, a; + bool seenAlpha = false; + bool seenFullAlpha = false; for (int i = 0; i < surf->h; i++) { + if (seenFullAlpha) { + break; + } for (int j = 0; j < surf->w; j++) { uint32 pix = *(uint32 *)surf->getBasePtr(j, i); surf->format.colorToARGB(pix, a, r, g, b); if (a != 255) { - return true; + seenAlpha = true; + if (a != 0) { + seenFullAlpha = true; + break; + } } } } - return false; + if (seenFullAlpha) { + return ALPHA_FULL; + } else if (seenAlpha) { + return ALPHA_BINARY; + } else { + return ALPHA_OPAQUE; + } } ////////////////////////////////////////////////////////////////////////// @@ -170,7 +185,7 @@ bool BaseSurfaceOSystem::finishLoad() { trans.applyColorKey(_ckRed, _ckGreen, _ckBlue, replaceAlpha); } - _hasAlpha = hasTransparency(_surface); + _alphaType = hasTransparencyType(_surface); _valid = true; _gameRef->addMem(_width * _height * 4); @@ -422,17 +437,11 @@ bool BaseSurfaceOSystem::drawSprite(int x, int y, Rect32 *rect, Rect32 *newRect, // TODO: This actually requires us to have the SAME source-offsets every time, // But no checking is in place for that yet. - // TODO: Optimize by not doing alpha-blits if we lack or disable alpha - - bool hasAlpha = false; - - if (_hasAlpha && !transform._alphaDisable) { - hasAlpha = true; - } - - if (transform._alphaDisable) { - warning("BaseSurfaceOSystem::drawSprite - AlphaDisable ignored"); + // Optimize by not doing alpha-blits if we lack alpha + if (_alphaType == ALPHA_OPAQUE && !transform._alphaDisable) { + transform._alphaDisable = true; } + renderer->drawSurface(this, _surface, &srcRect, &position, transform); return STATUS_OK; } @@ -447,7 +456,11 @@ bool BaseSurfaceOSystem::putSurface(const Graphics::Surface &surface, bool hasAl _loaded = true; _surface->free(); _surface->copyFrom(surface); - _hasAlpha = hasAlpha; + if (hasAlpha) { + _alphaType = ALPHA_FULL; + } else { + _alphaType = ALPHA_OPAQUE; + } BaseRenderOSystem *renderer = static_cast<BaseRenderOSystem *>(_gameRef->_renderer); renderer->invalidateTicketsFromSurface(this); |