dgl.cc

五行MMORPG引擎系统V1.0

                 U32             n,
                 const ColorI*   colorTable,
                 const U32       maxColorIndex,
                 F32             rot,
					  bool				bUTF16)
{
   // return on zero length strings
   if( n < 1 )
      return ptDraw.x;
   PROFILE_START(DrawText);

   MatrixF rotMatrix( EulerF( 0.0, 0.0, mDegToRad( rot ) ) );
   Point3F offset( ptDraw.x, ptDraw.y, 0.0 );
   Point3F points[4];

   U32 nCharCount = 0;

   Point2I     pt;
   UTF16       c;
   const UTF8  *str     = (const UTF8*)in_string;
   const UTF8  *endStr  = str + n;
   pt.x                 = 0;

   ColorI                  currentColor;
   S32                     currentPt = 0;

   TextureObject *lastTexture = NULL;

   currentColor      = sg_bitmapModulation;

   FrameTemp<TextVertex> vert(4*n);

   glDisable(GL_LIGHTING);

   glEnable(GL_TEXTURE_2D);
   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glEnable(GL_BLEND);

   glEnableClientState ( GL_VERTEX_ARRAY );
   glVertexPointer     ( 2, GL_FLOAT, sizeof(TextVertex), &(vert[0].p) );

   glEnableClientState ( GL_COLOR_ARRAY );
   glColorPointer      ( 4, GL_UNSIGNED_BYTE, sizeof(TextVertex), &(vert[0].c) );

   glEnableClientState ( GL_TEXTURE_COORD_ARRAY );
   glTexCoordPointer   ( 2, GL_FLOAT, sizeof(TextVertex), &(vert[0].t) );

   // first build the point, color, and coord arrays


	/// Chinese
#ifdef TGE_CHINESE
   for (; str < endStr; str++)//c = *(++str))
   {
		if(bUTF16)
		{	
			c = *(UTF16*)str++;
		}
		else
			c = GBSTEP(str);
#else
   U32 i;

   FrameTemp<UTF16> ubuf(dStrlen(str) + 1);
   convertUTF8toUTF16(str, ubuf, dStrlen(str) + 1);

   for(i = 0,c = ubuf[i];ubuf[i] && i < n;i++,c = ubuf[i])
   {
#endif


		nCharCount++;
      if(nCharCount > n)
          break;

      // We have to do a little dance here since \t = 0x9, \n = 0xa, and \r = 0xd
      if ((c >=  1 && c <=  7) ||
         (c >= 11 && c <= 12) ||
         (c == 14))
      {
         // Color code
         if (colorTable)
         {
            static U8 remap[15] =
            {
               0x0, // 0 special null terminator
               0x0, // 1 ascii start-of-heading??
               0x1, 
               0x2, 
               0x3, 
               0x4, 
               0x5, 
               0x6, 
               0x0, // 8 special backspace
               0x0, // 9 special tab
               0x0, // a special \n
               0x7, 
               0x8,
               0x0, // a special \r
               0x9 
            };

            U8 remapped = remap[c];
            // Ignore if the color is greater than the specified max index:
            if ( remapped <= maxColorIndex )
            {
               const ColorI &clr = colorTable[remapped];
               sg_bitmapModulation = clr;
               currentColor = clr;
            }
         }
         continue;
      }

      // reset color?
      if ( c == 15 )
      {
         currentColor = sg_textAnchorColor;
         sg_bitmapModulation = sg_textAnchorColor;
         continue;
      }

      // push color:
      if ( c == 16 )
      {
         sg_stackColor = sg_bitmapModulation;
         continue;
      }

      // pop color:
      if ( c == 17 )
      {
         currentColor = sg_stackColor;
         sg_bitmapModulation = sg_stackColor;
         continue;
      }

      // Tab character
      if ( c == dT('\t') ) 
      {
          const PlatformFont::CharInfo &ci = font->getCharInfo( dT(' ') );
          pt.x += ci.xIncrement * GFont::TabWidthInSpaces;
          continue;
      }

      if( !font->isValidChar( c ) )  
         continue;

      const PlatformFont::CharInfo &ci = font->getCharInfo(c);
      TextureObject *newObj = font->getTextureHandle(ci.bitmapIndex);
      if(newObj != lastTexture)
      {
         if(currentPt)
         {
            glBindTexture(GL_TEXTURE_2D, lastTexture->texGLName);
            glDrawArrays( GL_QUADS, 0, currentPt );
            currentPt = 0;
         }
         lastTexture = newObj;
      }
      if(ci.width != 0 && ci.height != 0)
      {
         pt.y = font->getBaseline() - ci.yOrigin;
         pt.x += ci.xOrigin;

         F32 texLeft   = F32(ci.xOffset)             / F32(lastTexture->texWidth);
         F32 texRight  = F32(ci.xOffset + ci.width)  / F32(lastTexture->texWidth);
         F32 texTop    = F32(ci.yOffset)             / F32(lastTexture->texHeight);
         F32 texBottom = F32(ci.yOffset + ci.height) / F32(lastTexture->texHeight);

         F32 screenLeft   = pt.x;
         F32 screenRight  = pt.x + ci.width;
         F32 screenTop    = pt.y;
         F32 screenBottom = pt.y + ci.height;

         points[0] = Point3F(screenLeft, screenBottom, 0.0);
         points[1] = Point3F(screenRight,  screenBottom, 0.0);
         points[2] = Point3F( screenRight,  screenTop, 0.0);
         points[3] = Point3F( screenLeft, screenTop, 0.0);

         for( int i=0; i<4; i++ )
         {
            rotMatrix.mulP( points[i] );
            points[i] += offset;
         }

         vert[currentPt++].set(points[0].x, points[0].y, texLeft, texBottom, currentColor);
         vert[currentPt++].set(points[1].x, points[1].y, texRight, texBottom, currentColor);
         vert[currentPt++].set(points[2].x, points[2].y, texRight, texTop, currentColor);
         vert[currentPt++].set(points[3].x, points[3].y, texLeft, texTop, currentColor);
         pt.x += ci.xIncrement - ci.xOrigin;
      }
      else
         pt.x += ci.xIncrement;
   }
   if(currentPt)
   {
      glBindTexture(GL_TEXTURE_2D, lastTexture->texGLName);
      glDrawArrays( GL_QUADS, 0, currentPt );
   }

   glDisableClientState ( GL_VERTEX_ARRAY );
   glDisableClientState ( GL_COLOR_ARRAY );
   glDisableClientState ( GL_TEXTURE_COORD_ARRAY );

   glDisable(GL_BLEND);
   glDisable(GL_TEXTURE_2D);

   pt.x += ptDraw.x; //*** DAW: Account for the fact that we removed the drawing point from the text start at the beginning.

   AssertFatal(pt.x >= ptDraw.x, "How did this happen?");
   PROFILE_END();

   return pt.x - ptDraw.x;
}


// -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- //
// Drawing primitives

void dglDrawLine(S32 x1, S32 y1, S32 x2, S32 y2, const ColorI &color)
{
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glDisable(GL_TEXTURE_2D);

   glColor4ub(color.red, color.green, color.blue, color.alpha);
   glBegin(GL_LINES);
   glVertex2f((F32)x1 + 0.5,  (F32)y1 + 0.5);
   glVertex2f((F32)x2 + 0.5,    (F32)y2 + 0.5);
   glEnd();
	glBegin(GL_POINTS);
	glVertex2f((F32)x2 + 0.5, (F32)y2 + 0.5);
	glEnd();
}

void dglDrawLine(const Point2I &startPt, const Point2I &endPt, const ColorI &color)
{
	dglDrawLine(startPt.x, startPt.y, endPt.x, endPt.y, color);
}

void dglDrawRect(const Point2I &upperL, const Point2I &lowerR, const ColorI &color)
{
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glDisable(GL_TEXTURE_2D);

   glColor4ub(color.red, color.green, color.blue, color.alpha);
   glBegin(GL_LINE_LOOP);
      glVertex2f((F32)upperL.x + 0.5, (F32)upperL.y + 0.5);
      glVertex2f((F32)lowerR.x + 0.5, (F32)upperL.y + 0.5);
      glVertex2f((F32)lowerR.x + 0.5, (F32)lowerR.y + 0.5);
      glVertex2f((F32)upperL.x + 0.5, (F32)lowerR.y + 0.5);
   glEnd();
}

// the fill convention for lined rects is that they outline the rectangle border of the
// filled region specified.

void dglDrawRect(const RectI &rect, const ColorI &color)
{
   Point2I lowerR(rect.point.x + rect.extent.x - 1, rect.point.y + rect.extent.y - 1);
   dglDrawRect(rect.point, lowerR, color);
}

// the fill convention says that pixel at upperL will be filled and
// that pixel at lowerR will NOT be filled.

void dglDrawRectFill(const Point2I &upperL, const Point2I &lowerR, const ColorI &color)
{
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glDisable(GL_TEXTURE_2D);

   glColor4ub(color.red, color.green, color.blue, color.alpha);
   glRecti((S32)upperL.x, (S32)upperL.y, (S32)lowerR.x, (S32)lowerR.y);
}
void dglDrawRectFill(const RectI &rect, const ColorI &color)
{
   Point2I lowerR(rect.point.x + rect.extent.x, rect.point.y + rect.extent.y);
   dglDrawRectFill(rect.point, lowerR, color);
}

void dglDraw2DSquare( const Point2F &screenPoint, F32 width, F32 spinAngle )
{
   width *= 0.5;

   MatrixF rotMatrix( EulerF( 0.0, 0.0, spinAngle ) );

   Point3F offset( screenPoint.x, screenPoint.y, 0.0 );
   Point3F points[4];

   points[0] = Point3F(-width, -width, 0.0);
   points[1] = Point3F(-width,  width, 0.0);
   points[2] = Point3F( width,  width, 0.0);
   points[3] = Point3F( width, -width, 0.0);

   for( int i=0; i<4; i++ )
   {
      rotMatrix.mulP( points[i] );
      points[i] += offset;
   }

   glBegin(GL_TRIANGLE_FAN);
      glTexCoord2f(0.0, 0.0);
      glVertex2fv(points[0]);

      glTexCoord2f(0.0, 1.0);
      glVertex2fv(points[1]);

      glTexCoord2f(1.0, 1.0);
      glVertex2fv(points[2]);

      glTexCoord2f(1.0, 0.0);
      glVertex2fv(points[3]);
   glEnd();
}

void dglDrawBillboard( const Point3F &position, F32 width, F32 spinAngle )
{
   MatrixF modelview;
   dglGetModelview( &modelview );
   modelview.transpose();


   width *= 0.5;
   Point3F points[4];
   points[0] = Point3F(-width, 0.0, -width);
   points[1] = Point3F(-width, 0.0,  width);
   points[2] = Point3F( width, 0.0,  width);
   points[3] = Point3F( width, 0.0, -width);


   MatrixF rotMatrix( EulerF( 0.0, spinAngle, 0.0 ) );

   for( int i=0; i<4; i++ )
   {
      rotMatrix.mulP( points[i] );
      modelview.mulP( points[i] );
      points[i] += position;
   }

   glBegin(GL_TRIANGLE_FAN);
      glTexCoord2f(0.0, 1.0);
      glVertex3fv(points[0]);

      glTexCoord2f(0.0, 0.0);
      glVertex3fv(points[1]);

      glTexCoord2f(1.0, 0.0);
      glVertex3fv(points[2]);

      glTexCoord2f(1.0, 1.0);
      glVertex3fv(points[3]);
   glEnd();
}

void dglWireCube(const Point3F & extent, const Point3F & center)
{
   static Point3F cubePoints[8] =
   {
      Point3F(-1, -1, -1), Point3F(-1, -1,  1), Point3F(-1,  1, -1), Point3F(-1,  1,  1),
         Point3F( 1, -1, -1), Point3F( 1, -1,  1), Point3F( 1,  1, -1), Point3F( 1,  1,  1)
   };

   static U32 cubeFaces[6][4] =
   {
      { 0, 2, 6, 4 }, { 0, 2, 3, 1 }, { 0, 1, 5, 4 },
      { 3, 2, 6, 7 }, { 7, 6, 4, 5 }, { 3, 7, 5, 1 }
   };

   glDisable(GL_CULL_FACE);

   for (S32 i = 0; i < 6; i++)
   {
      glBegin(GL_LINE_LOOP);
      for(int vert = 0; vert < 4; vert++)
      {
         int idx = cubeFaces[i][vert];
         glVertex3f(cubePoints[idx].x * extent.x + center.x,
            cubePoints[idx].y * extent.y + center.y,
            cubePoints[idx].z * extent.z + center.z);
      }
      glEnd();
   }
}


void dglSolidCube(const Point3F & extent, const Point3F & center)
{
   static Point3F cubePoints[8] =
   {
      Point3F(-1, -1, -1), Point3F(-1, -1,  1), Point3F(-1,  1, -1), Point3F(-1,  1,  1),
         Point3F( 1, -1, -1), Point3F( 1, -1,  1), Point3F( 1,  1, -1), Point3F( 1,  1,  1)
   };

   static U32 cubeFaces[6][4] =
   {
      { 0, 2, 6, 4 }, { 0, 2, 3, 1 }, { 0, 1, 5, 4 },
      { 3, 2, 6, 7 }, { 7, 6, 4, 5 }, { 3, 7, 5, 1 }
   };

   for (S32 i = 0; i < 6; i++)
   {
      glBegin(GL_TRIANGLE_FAN);
      for(int vert = 0; vert < 4; vert++)
      {
         int idx = cubeFaces[i][vert];
         glVertex3f(cubePoints[idx].x * extent.x + center.x,
            cubePoints[idx].y * extent.y + center.y,
            cubePoints[idx].z * extent.z + center.z);
      }
      glEnd();
   }