mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-14 21:59:17 +00:00
441 lines
11 KiB
C++
441 lines
11 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/endian.h"
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#include "common/file.h"
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#include "common/util.h"
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#include "cruise/cruise_main.h"
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#include "cruise/mouse.h"
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#include "cruise/staticres.h"
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namespace Cruise {
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const int SPACE_WIDTH = 4;
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/**
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* Determines the line size by finding the highest character in the given font set
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*/
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int32 getLineHeight(int16 charCount, const FontEntry *fontPtr) {
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int32 highestChar = 0;
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if (!charCount)
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return (0);
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for (int i = 0; i < charCount; ++i) {
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int charHeight = fontPtr[i].charHeight;
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if (charHeight > highestChar) highestChar = charHeight;
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}
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return highestChar;
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}
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/**
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* This function determins how many lines the text will have
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*/
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int32 getTextLineCount(int32 rightBorder_X, int16 wordSpacingWidth,
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const FontEntry *fontData, const char *textString) {
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const char *localString = textString;
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const char *tempPtr = textString;
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uint8 ch;
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int32 total = 0, lineLength = 0;
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if (!*textString)
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return (0);
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ch = *localString;
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do {
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int32 charData = fontCharacterTable[ch];
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if (ch == '|') {
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lineLength = rightBorder_X;
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localString = tempPtr;
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} else if (charData >= 0) {
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lineLength += wordSpacingWidth + (int16)fontData[charData].charWidth;
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} else if (ch == ' ') {
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lineLength += wordSpacingWidth + SPACE_WIDTH;
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localString = tempPtr;
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}
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if (lineLength >= rightBorder_X) {
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total += rightBorder_X;
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tempPtr = localString;
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lineLength = 0;
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}
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ch = *++tempPtr;
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} while (ch);
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if (lineLength > 0)
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total += rightBorder_X;
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return (total / rightBorder_X);
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}
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void loadFNT(const char *fileName) {
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uint8 header[4];
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_systemFNT = NULL;
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Common::File fontFileHandle;
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if (!fontFileHandle.exists(fileName))
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return;
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fontFileHandle.open((const char *)fileName);
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fontFileHandle.read(header, 4);
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if (strcmp((char*)header, "FNT") == 0) {
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uint32 fontSize = fontFileHandle.readUint32BE();
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_systemFNT = (uint8 *)mallocAndZero(fontSize);
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if (_systemFNT != NULL) {
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fontFileHandle.seek(4);
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fontFileHandle.read(_systemFNT, fontSize);
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// Flip structure values from BE to LE for font files - this is for consistency
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// with font resources, which are in LE formatt
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FontInfo *f = (FontInfo *)_systemFNT;
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bigEndianLongToNative(&f->offset);
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bigEndianLongToNative(&f->size);
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flipGen(&f->numChars, 6); // numChars, hSpacing, and vSpacing
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FontEntry *fe = (FontEntry *)(_systemFNT + sizeof(FontInfo));
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for (int i = 0; i < f->numChars; ++i, ++fe) {
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bigEndianLongToNative(&fe->offset); // Flip 32-bit offset field
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flipGen(&fe->v1, 8); // Flip remaining 16-bit fields
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}
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}
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}
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fontFileHandle.close();
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}
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void initSystem(void) {
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int32 i;
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itemColor = 15;
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titleColor = 9;
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selectColor = 13;
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subColor = 10;
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for (i = 0; i < 64; i++) {
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strcpy(preloadData[i].name, "");
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preloadData[i].ptr = NULL;
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preloadData[i].nofree = 0;
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}
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lowMemory = 0;
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doFade = 0;
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fadeFlag = 0;
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scroll = 0;
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switchPal = 0;
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masterScreen = 0;
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changeCursor(CURSOR_NOMOUSE);
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changeCursor(CURSOR_NORMAL);
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mouseOn();
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strcpy(cmdLine, "");
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loadFNT("system.fnt");
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}
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void freeSystem(void) {
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free(_systemFNT);
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}
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void bigEndianShortToNative(void *var) {
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WRITE_UINT16(var, READ_BE_UINT16(var));
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}
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void bigEndianLongToNative(void *var) {
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WRITE_UINT32(var, READ_BE_UINT32(var));
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}
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void flipGen(void *var, int32 length) {
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int i;
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short int *varPtr = (int16 *) var;
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for (i = 0; i < (length / 2); i++) {
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bigEndianShortToNative(&varPtr[i]);
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}
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}
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void renderWord(const uint8 *fontPtr_Data, uint8 *outBufferPtr, int xOffset, int yOffset,
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int32 height, int32 param4, int32 stringRenderBufferSize, int32 width, int32 charWidth) {
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int i;
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int j;
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const uint8 *fontPtr_Data2 = fontPtr_Data + height * 2;
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outBufferPtr += yOffset * width + xOffset;
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for (i = 0; i < height; i++) { // y++
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uint16 bitSet1 = READ_BE_UINT16(fontPtr_Data);
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uint16 bitSet2 = READ_BE_UINT16(fontPtr_Data2);
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fontPtr_Data += sizeof(uint16);
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fontPtr_Data2 += sizeof(uint16);
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for (j = 0; j < charWidth; j++) {
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*outBufferPtr = ((bitSet1 >> 15) & 1) | ((bitSet2 >> 14) & 2);
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outBufferPtr++;
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bitSet1 <<= 1;
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bitSet2 <<= 1;
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}
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outBufferPtr += width - charWidth;
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}
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}
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// returns character count and pixel size (via pointer) per line of the string (old: prepareWordRender(int32 param, int32 var1, int16* out2, uint8* ptr3, uint8* string))
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int32 prepareWordRender(int32 inRightBorder_X, int16 wordSpacingWidth,
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int16 *strPixelLength, const FontEntry *fontData, const char *textString) {
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const char *localString = textString;
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int32 counter = 0;
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int32 finish = 0;
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int32 temp_pc = 0; // var_A // temporary pixel count save
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int32 temp_cc = 0; // var_C // temporary char count save
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int32 pixelCount = 0; // si
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do {
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uint8 character = *(localString++);
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int16 charData = fontCharacterTable[character];
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if (character == ' ') {
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temp_cc = counter;
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temp_pc = pixelCount;
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if (pixelCount + wordSpacingWidth + SPACE_WIDTH >=
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inRightBorder_X) {
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finish = 1;
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} else {
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pixelCount += wordSpacingWidth + SPACE_WIDTH;
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}
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} else {
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if (character == '|' || !character) {
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finish = 1;
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} else {
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if (charData >= 0) {
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if (pixelCount + wordSpacingWidth +
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(int16)fontData[charData].charWidth >= inRightBorder_X) {
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finish = 1;
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if (temp_pc) {
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pixelCount = temp_pc;
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counter = temp_cc;
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}
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} else {
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pixelCount += wordSpacingWidth +
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(int16)fontData[charData].charWidth;
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}
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}
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}
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}
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counter++;
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} while (!finish);
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*strPixelLength = (int16) pixelCount;
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return counter;
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}
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void drawString(int32 x, int32 y, const char *string, uint8 *buffer, uint8 fontColour, int32 rightBorder_X) {
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// Get the rendered text to display
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gfxEntryStruct *s = renderText(rightBorder_X, string);
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// Draw the message
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drawMessage(s, x, y, rightBorder_X - x, fontColour, buffer);
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// Free the data
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delete s->imagePtr;
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delete s;
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}
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// calculates all necessary datas and renders text
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gfxEntryStruct *renderText(int inRightBorder_X, const char *string) {
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const FontInfo *fontPtr;
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const FontEntry *fontPtr_Desc;
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const uint8 *fontPtr_Data;
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int16 wordSpacingWidth; // 0 or -1
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int16 wordSpacingHeight;// 0 or -1
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int32 rightBorder_X;
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int32 lineHeight;
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int32 numLines;
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int32 stringHeight;
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int32 stringFinished;
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int32 stringWidth; // var_1C
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int32 stringRenderBufferSize;
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// int32 useDynamicBuffer;
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uint8 *currentStrRenderBuffer;
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// int32 var_8; // don't need that one
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int32 heightOffset; // var_12 // how much pixel-lines have already been drawn
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// int32 var_1E;
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gfxEntryStruct *generatedGfxEntry;
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// check if string is empty
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if (!string) {
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return NULL;
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}
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// check if font has been loaded, else get system font
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if (fontFileIndex != -1) {
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fontPtr = (const FontInfo *)filesDatabase[fontFileIndex].subData.ptr;
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if (!fontPtr) {
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fontPtr = (const FontInfo *)_systemFNT;
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}
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} else {
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fontPtr = (const FontInfo *)_systemFNT;
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}
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if (!fontPtr) {
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return NULL;
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}
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fontPtr_Desc = (const FontEntry *)((const uint8 *)fontPtr + sizeof(FontInfo));
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fontPtr_Data = (const uint8 *)fontPtr + fontPtr->offset;
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lineHeight = getLineHeight(fontPtr->numChars, fontPtr_Desc);
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wordSpacingWidth = fontPtr->hSpacing;
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wordSpacingHeight = fontPtr->vSpacing;
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// if right border is higher then screenwidth (+ spacing), adjust border
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if (inRightBorder_X > 310) {
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rightBorder_X = 310;
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} else {
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rightBorder_X = inRightBorder_X;
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}
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numLines = getTextLineCount(rightBorder_X, wordSpacingWidth, fontPtr_Desc, string); // ok
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if (!numLines) {
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return NULL;
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}
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stringHeight = ((wordSpacingHeight + lineHeight + 2) * numLines) + 1;
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stringFinished = 0;
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stringWidth = rightBorder_X + 2; // max render width to the right
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stringRenderBufferSize = stringWidth * stringHeight * 4;
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inRightBorder_X = rightBorder_X;
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currentStrRenderBuffer =
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(uint8 *) mallocAndZero(stringRenderBufferSize);
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resetBitmap(currentStrRenderBuffer, stringRenderBufferSize);
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generatedGfxEntry = (gfxEntryStruct *) malloc(sizeof(gfxEntryStruct));
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generatedGfxEntry->imagePtr = currentStrRenderBuffer;
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generatedGfxEntry->imageSize = stringRenderBufferSize / 2;
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generatedGfxEntry->fontIndex = fontFileIndex;
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generatedGfxEntry->height = stringHeight;
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generatedGfxEntry->width = stringWidth; // maximum render width to the right
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// var_8 = 0;
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heightOffset = 0;
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do {
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int spacesCount = 0; // si
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unsigned char character = *string;
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short int strPixelLength; // var_16
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const char *ptrStringEnd; // var_4 //ok
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int drawPosPixel_X; // di
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// find first letter in string, skip all spaces
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while (character == ' ') {
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spacesCount++;
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character = *(string + spacesCount);
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}
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string += spacesCount;
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// returns character count and pixel length (via pointer) per line of the text string
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ptrStringEnd = string + prepareWordRender(inRightBorder_X, wordSpacingWidth, &strPixelLength, fontPtr_Desc, string); //ok
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// determine how much space is left to the right and left (center text)
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if (inRightBorder_X > strPixelLength) {
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//var_8 = (inRightBorder_X - strPixelLength) / 2;
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drawPosPixel_X =
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(inRightBorder_X - strPixelLength) / 2;
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} else {
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drawPosPixel_X = 0;
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}
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//drawPosPixel_X = var_8;
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// draw textline, character wise
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do {
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character = *(string++);
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short int charData = fontCharacterTable[character]; // get character position
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if (character) {
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if (character == ' ' || character == 0x7C) {
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drawPosPixel_X += wordSpacingWidth + SPACE_WIDTH; // if char = "space" adjust word starting postion (don't render space though);
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} else {
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if (charData >= 0) {
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const FontEntry &fe = fontPtr_Desc[charData];
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// should ist be stringRenderBufferSize/2 for the second last param?
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renderWord((const uint8 *)fontPtr_Data + fe.offset,
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currentStrRenderBuffer,
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drawPosPixel_X,
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fe.height2 - fe.charHeight +
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lineHeight + heightOffset,
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fe.charHeight,
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fe.v1,
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stringRenderBufferSize,
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stringWidth,
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(int16)fe.charWidth);
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drawPosPixel_X +=
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wordSpacingWidth + (int16)fe.charWidth;
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}
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}
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} else {
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stringFinished = 1; // character = 0x00
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}
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} while ((string < ptrStringEnd) && !stringFinished);
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// var_8 = 0;
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heightOffset += wordSpacingHeight + lineHeight;
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} while (!stringFinished);
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return generatedGfxEntry;
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}
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void freeGfx(gfxEntryStruct *pGfx) {
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if (pGfx->imagePtr) {
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free(pGfx->imagePtr);
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}
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free(pGfx);
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}
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} // End of namespace Cruise
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