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author | Joost Peters | 2003-04-20 15:51:29 +0000 |
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committer | Joost Peters | 2003-04-20 15:51:29 +0000 |
commit | c8f51b3581011a681446d8866c5501af1d2f8d6d (patch) | |
tree | cb2a02ad2a17d7b47c4675f6c8a5733293bf526e /sky/text.cpp | |
parent | 4c6676d390ba1bc3828a3e53fda08476b26164a3 (diff) | |
download | scummvm-rg350-c8f51b3581011a681446d8866c5501af1d2f8d6d.tar.gz scummvm-rg350-c8f51b3581011a681446d8866c5501af1d2f8d6d.tar.bz2 scummvm-rg350-c8f51b3581011a681446d8866c5501af1d2f8d6d.zip |
added text rendering
svn-id: r7029
Diffstat (limited to 'sky/text.cpp')
-rw-r--r-- | sky/text.cpp | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/sky/text.cpp b/sky/text.cpp index d88b83a4d9..3c0a368165 100644 --- a/sky/text.cpp +++ b/sky/text.cpp @@ -29,6 +29,8 @@ #define NO_OF_TEXT_SECTIONS 8 // 8 sections per language #define CHAR_SET_FILE 60150 #define MAX_SPEECH_SECTION 7 +#define CHAR_SET_HEADER 128 +#define MAX_NO_LINES 10 SkyText::SkyText(SkyDisk *skyDisk, uint32 gameVersion) { _skyDisk = skyDisk; @@ -161,6 +163,161 @@ bool SkyText::getTBit() { return (bool)(((_inputValue) >> (_shiftBits)) & 1); } +void SkyText::displayText(uint8 *dest, bool centre, uint16 pixelWidth, uint8 color) { + //Render text in _textBuffer in buffer *dest + displayText(this->_textBuffer, dest, centre, pixelWidth, color); +} + +void SkyText::displayText(char *textPtr, uint8 *dest, bool centre, uint16 pixelWidth, uint8 color) { + + //Render text pointed to by *textPtr in buffer *dest + + char textChar; + char *curPos = textPtr; + char *lastSpace = curPos; + byte *centerTblPtr = _centreTable; + uint16 lineWidth = 0; + + _dtCol = color; + _dtLineWidth = pixelWidth; + _dtLines = 0; + _dtLetters = 1; + _dtData = dest; + _dtText = textPtr; + _dtCentre = centre; + + textChar = *curPos++; + _dtLetters++; + + while (textChar >= 0x20) { + + textChar -= 0x20; + if (textChar == 0) { + lastSpace = curPos; //keep track of last space + *(uint32*)centerTblPtr = TO_LE_32(lineWidth); + } + + lineWidth += *(_characterSet+textChar); //add character width + lineWidth += _dtCharSpacing; //include character spacing + + if (pixelWidth <= lineWidth) { + + if (*(lastSpace-1) == 10) + warning("line width exceeded!"); + + *(lastSpace-1) = 10; + lineWidth = 0; + _dtLines++; + centerTblPtr += 4; //get next space in centering table + curPos = lastSpace; //go back for new count + } + + textChar = *curPos++; + _dtLetters++; + } + + _dtLastWidth = lineWidth; //save width of last line + *(uint32 *)centerTblPtr = TO_LE_32(lineWidth); //and update centering table + _dtLines++; + + if (_dtLines > MAX_NO_LINES) + error("Maximum no. of lines exceeded!"); + + _dtLineSize = pixelWidth * _charHeight; + uint32 numBytes = (_dtLineSize * _dtLines) + sizeof(struct dataFileHeader) + 4; + + if (_dtData == NULL) + _dtData = (byte *)malloc(numBytes); + + byte *curDest = dest; + + uint32 bytesToClear = numBytes; //no of bytes to clear + bytesToClear -= sizeof(struct dataFileHeader); //don't touch the header. + memset(curDest + sizeof(struct dataFileHeader), 0, bytesToClear); + curPos += bytesToClear; + + //make the header + ((struct dataFileHeader *)curDest)->s_width = TO_LE_16(_dtLineWidth); + ((struct dataFileHeader *)curDest)->s_height = TO_LE_16(_charHeight * _dtLines); + ((struct dataFileHeader *)curDest)->s_sp_size = TO_LE_16(_dtLineWidth * _charHeight * _dtLines); + ((struct dataFileHeader *)curDest)->s_offset_x = TO_LE_16(0); + ((struct dataFileHeader *)curDest)->s_offset_y = TO_LE_16(0); + + //reset position + curPos = textPtr; + + curDest += sizeof(struct dataFileHeader); //point to where pixels start + byte *prevDest = curDest; + centerTblPtr = _centreTable; + + do { + if (_dtCentre) { + + uint32 width = _dtLineWidth; + width -= READ_LE_UINT32(centerTblPtr); + centerTblPtr += 4; + width >>=1; + curDest += width; + } + + textChar = *curPos++; + while (textChar >= 0x20) { + textChar -= 0x20; + makeGameCharacter(textChar, _characterSet, curDest, color); + textChar = *curPos++; + } + + curDest = prevDest; //start of last line + curDest += _dtLineSize; //start of next + prevDest = curDest; + + } while (textChar >= 10); + +} + +void SkyText::makeGameCharacter(char textChar, uint8 *charSet, uint8 *&dest, uint8 color) { + + bool maskBit, dataBit; + uint8 charWidth = (*(charSet + textChar)) + 1 - _dtCharSpacing; + uint16 data, mask; + byte *charSpritePtr = (charSet + CHAR_SET_HEADER + ((_charHeight << 2) * textChar)); + byte *startPos = dest; + byte *curPos = startPos; + + for (int i = 0; i < _charHeight; i++) { + + byte *prevPos = curPos; + + data = READ_BE_UINT16(charSpritePtr); + mask = READ_BE_UINT16(charSpritePtr + 2); + charSpritePtr += 4; + + for (int j = 0; j < charWidth; j++) { + + maskBit = (bool)(mask & 0x8000); //check mask + mask <<= 1; + dataBit = (bool)(data & 0x8000); //check data + data <<= 1; + + if (maskBit) + if (dataBit) + *curPos = color; + else + *curPos = 240; //transparent + + curPos++; + } + + //advance a line + curPos = prevPos; + curPos += _dtLineWidth; + } + + //update position + dest = startPos + charWidth + _dtCharSpacing*2 - 1; + +} + char SkyText_v00267::getTextChar() { //NOTE: The decoding code for the floppy versions (both demo and full version) is _completely_ different. |