C++ idSWFBitStream::ReadMatrix方法代码示例

/*
========================
idSWF::DefineTextX
========================
*/
void idSWF::DefineTextX( idSWFBitStream & bitstream, bool rgba ) {
	uint16 characterID = bitstream.ReadU16();
	idSWFDictionaryEntry * entry = AddDictionaryEntry( characterID, SWF_DICT_TEXT );
	if ( entry == NULL ) {
		return;
	}
	idSWFText * text = entry->text;

	bitstream.ReadRect( text->bounds );
	bitstream.ReadMatrix( text->matrix );

	uint8 glyphBits = bitstream.ReadU8();
	uint8 advanceBits = bitstream.ReadU8();

	while ( true ) {
		uint8 flags = bitstream.ReadU8();
		if ( flags == 0 ) {
			break;
		}
		idSWFTextRecord & textRecord = text->textRecords.Alloc();

		if ( flags & BIT( 3 ) ) {
			textRecord.fontID = bitstream.ReadU16();
		}
		if ( flags & BIT( 2 ) ) {
			if ( rgba ) {
				bitstream.ReadColorRGBA( textRecord.color );
			} else {
				bitstream.ReadColorRGB( textRecord.color );
			}
		}
		if ( flags & BIT( 0 ) ) {
			textRecord.xOffset = bitstream.ReadS16();
		}
		if ( flags & BIT( 1 ) ) {
			textRecord.yOffset = bitstream.ReadS16();
		}
		if ( flags & BIT( 3 ) ) {
			textRecord.textHeight = bitstream.ReadU16();
		}
		textRecord.firstGlyph = text->glyphs.Num();
		textRecord.numGlyphs = bitstream.ReadU8();
		for ( int i = 0; i < textRecord.numGlyphs; i++ ) {
			swfGlyphEntry_t & glyph = text->glyphs.Alloc();
			glyph.index = bitstream.ReadU( glyphBits );
			glyph.advance = bitstream.ReadS( advanceBits );
		}
	};
}

/*
========================
idSWFSpriteInstance::PlaceObject2
========================
*/
void idSWFSpriteInstance::PlaceObject2( idSWFBitStream & bitstream ) {
	c_PlaceObject2++;

	uint64 flags = bitstream.ReadU8();
	int depth = bitstream.ReadU16();

	int characterID = -1;
	if ( ( flags & PlaceFlagHasCharacter ) != 0 ) {
		characterID = bitstream.ReadU16();
	}

	swfDisplayEntry_t * display = NULL;

	if ( ( flags & PlaceFlagMove ) != 0 ) {
		// modify an existing entry
		display = FindDisplayEntry( depth );
		if ( display == NULL ) {
			idLib::Warning( "PlaceObject2: trying to modify entry %d, which doesn't exist", depth );
			return;
		}
		if ( characterID >= 0 ) {
			// We are very picky about what kind of objects can change characters
			// Shapes can become other shapes, but sprites can never change
			if ( display->spriteInstance || display->textInstance ) {
				idLib::Warning( "PlaceObject2: Trying to change the character of a sprite after it's been created" );
				return;
			}
			idSWFDictionaryEntry * dictEntry = sprite->swf->FindDictionaryEntry( characterID );
			if ( dictEntry != NULL ) {
				if ( dictEntry->type == SWF_DICT_SPRITE || dictEntry->type == SWF_DICT_EDITTEXT ) {
					idLib::Warning( "PlaceObject2: Trying to change the character of a shape to a sprite" );
					return;
				}
			}
			display->characterID = characterID;
		}
	} else {
		if ( characterID < 0 ) {
			idLib::Warning( "PlaceObject2: Trying to create a new object without a character" );
			return;
		}
		// create a new entry
		display = AddDisplayEntry( depth, characterID );
		if ( display == NULL ) {
			idLib::Warning( "PlaceObject2: trying to create a new entry at %d, but an item already exists there", depth );
			return;
		}
	}
	if ( ( flags & PlaceFlagHasMatrix ) != 0 ) {
		bitstream.ReadMatrix( display->matrix );
	}
	if ( ( flags & PlaceFlagHasColorTransform ) != 0 ) {
		bitstream.ReadColorXFormRGBA( display->cxf );
	}
	if ( ( flags & PlaceFlagHasRatio ) != 0 ) {
		display->ratio = bitstream.ReadU16() * ( 1.0f / 65535.0f );
	}
	if ( ( flags & PlaceFlagHasName ) != 0 ) {
		idStr name = bitstream.ReadString();
		if ( display->spriteInstance ) {
			display->spriteInstance->name = name;
			scriptObject->Set( name, display->spriteInstance->GetScriptObject() );
		} else if ( display->textInstance ) {
			scriptObject->Set( name, display->textInstance->GetScriptObject() );
		}
	}
	if ( ( flags & PlaceFlagHasClipDepth ) != 0 ) {
		display->clipDepth = bitstream.ReadU16();
	}
	if ( ( flags & PlaceFlagHasClipActions ) != 0 ) {
		// FIXME: clip actions
	}
}