C++ FTexture类代码示例

FSoftwareTexture *RenderPolySprite::GetSpriteTexture(AActor *thing, /*out*/ bool &flipX)
{
	const auto &viewpoint = PolyRenderer::Instance()->Viewpoint;
	flipX = false;

	if (thing->renderflags & RF_FLATSPRITE)
		return nullptr;	// do not draw flat sprites.

	if (thing->picnum.isValid())
	{
		FTexture *ttex = TexMan.GetPalettedTexture(thing->picnum, true);
		if (!ttex || !ttex->isValid())
		{
			return nullptr;
		}
		FSoftwareTexture *tex = ttex->GetSoftwareTexture();

		if (ttex->GetRotations() != 0xFFFF)
		{
			// choose a different rotation based on player view
			spriteframe_t *sprframe = &SpriteFrames[ttex->GetRotations()];
			DVector3 pos = thing->InterpolatedPosition(viewpoint.TicFrac);
			pos.Z += thing->GetBobOffset(viewpoint.TicFrac);
			DAngle ang = (pos - viewpoint.Pos).Angle();
			angle_t rot;
			if (sprframe->Texture[0] == sprframe->Texture[1])
			{
				rot = (ang - thing->Angles.Yaw + 45.0 / 2 * 9).BAMs() >> 28;
			}

void DBaseDecal::Spread (const FDecalTemplate *tpl, side_t *wall, fixed_t x, fixed_t y, fixed_t z, F3DFloor * ffloor)
{
	FTexture *tex;
	vertex_t *v1;
	fixed_t rorg, ldx, ldy;

	GetWallStuff (wall, v1, ldx, ldy);
	rorg = Length (x - v1->x, y - v1->y);

	tex = TexMan[PicNum];
	int dwidth = tex->GetWidth ();

	DecalWidth = dwidth * ScaleX;
	DecalLeft = tex->LeftOffset * ScaleX;
	DecalRight = DecalWidth - DecalLeft;
	SpreadSource = this;
	SpreadTemplate = tpl;
	SpreadZ = z;

	// Try spreading left first
	SpreadLeft (rorg - DecalLeft, v1, wall, ffloor);
	SpreadStack.Clear ();

	// Then try spreading right
	SpreadRight (rorg + DecalRight, wall,
			Length (wall->linedef->dx, wall->linedef->dy), ffloor);
	SpreadStack.Clear ();
}

static void DrawHudText(FFont *font, int color, char * text, int x, int y, int trans=0xc000)
{
	int zerowidth;
	FTexture *tex_zero = font->GetChar('0', &zerowidth);

	x+=zerowidth/2;
	for(int i=0;text[i];i++)
	{
		int width;
		FTexture *texc = font->GetChar(text[i], &width);
		if (texc != NULL)
		{
			double offset = texc->GetScaledTopOffsetDouble() 
				- tex_zero->GetScaledTopOffsetDouble() 
				+ tex_zero->GetScaledHeightDouble();

			screen->DrawChar(font, color, x, y, text[i],
				DTA_KeepRatio, true,
				DTA_VirtualWidth, hudwidth, DTA_VirtualHeight, hudheight, DTA_Alpha, trans, 
				DTA_LeftOffset, width/2, DTA_TopOffsetF, offset,
				/*DTA_CenterBottomOffset, 1,*/ TAG_DONE);
		}
		x += zerowidth;
	}
}

static void DrawOneWeapon(player_t * CPlayer, int x, int & y, AWeapon * weapon)
{
	int trans;

	// Powered up weapons and inherited sister weapons are not displayed.
	if (weapon->WeaponFlags & WIF_POWERED_UP) return;
	if (weapon->SisterWeapon && weapon->IsKindOf(weapon->SisterWeapon->GetClass())) return;

	trans=0x6666;
	if (CPlayer->ReadyWeapon)
	{
		if (weapon==CPlayer->ReadyWeapon || weapon==CPlayer->ReadyWeapon->SisterWeapon) trans=0xd999;
	}

	FTextureID picnum = GetInventoryIcon(weapon, DI_ALTICONFIRST);

	if (picnum.isValid())
	{
		FTexture * tex = TexMan[picnum];
		int w = tex->GetWidth();
		int h = tex->GetHeight();
		int rh;
		if (w>h) rh=8;
		else rh=16,y-=8;		// don't draw tall sprites too small!
		DrawImageToBox(tex, x-24, y, 20, rh, trans);
		y-=10;
	}
}

FTexture* FResourceGroup::CreateTexture(const std::string& Name, int Width, int Height, void* Data, DXGI_FORMAT TextureFormat /*= DXGI_FORMAT_R8G8B8A8_UNORM*/, int bytesPerPixel /*= 4*/)
{
	FTexture* Texture = new FTexture(GraphicsContext, Width, Height, Data, TextureFormat, bytesPerPixel);
	Textures.AddResource(Name, Texture);
	Texture->SetName(Name);
	return Texture;
}

void DBaseDecal::Spread (const FDecalTemplate *tpl, side_t *wall, double x, double y, double z, F3DFloor * ffloor)
{
	FTexture *tex;
	vertex_t *v1;
	double rorg, ldx, ldy;

	GetWallStuff (wall, v1, ldx, ldy);
	rorg = Length (x - v1->fX(), y - v1->fY());

	if ((tex = TexMan[PicNum]) == NULL)
	{
		return;
	}

	int dwidth = tex->GetWidth ();

	DecalWidth = dwidth * ScaleX;
	DecalLeft = tex->LeftOffset * ScaleX;
	DecalRight = DecalWidth - DecalLeft;
	SpreadSource = this;
	SpreadTemplate = tpl;
	SpreadZ = z;

	// Try spreading left first
	SpreadLeft (rorg - DecalLeft, v1, wall, ffloor);
	SpreadStack.Clear ();

	// Then try spreading right
	SpreadRight (rorg + DecalRight, wall,
			Length (wall->linedef->Delta().X, wall->linedef->Delta().Y), ffloor);
	SpreadStack.Clear ();
}

void FTextureManager::ParseCameraTexture(FScanner &sc)
{
	const BITFIELD texflags = TEXMAN_Overridable | TEXMAN_TryAny | TEXMAN_ShortNameOnly;
	int width, height;
	int fitwidth, fitheight;
	FString picname;

	sc.MustGetString ();
	picname = sc.String;
	sc.MustGetNumber ();
	width = sc.Number;
	sc.MustGetNumber ();
	height = sc.Number;
	FTextureID picnum = CheckForTexture (picname, FTexture::TEX_Flat, texflags);
	FTexture *viewer = new FCanvasTexture (picname, width, height);
	if (picnum.Exists())
	{
		FTexture *oldtex = Texture(picnum);
		fitwidth = oldtex->GetScaledWidth ();
		fitheight = oldtex->GetScaledHeight ();
		viewer->UseType = oldtex->UseType;
		ReplaceTexture (picnum, viewer, true);
	}
	else
	{
		fitwidth = width;
		fitheight = height;
		// [GRB] No need for oldtex
		viewer->UseType = FTexture::TEX_Wall;
		AddTexture (viewer);
	}
	if (sc.GetString())
	{
		if (sc.Compare ("fit"))
		{
			sc.MustGetNumber ();
			fitwidth = sc.Number;
			sc.MustGetNumber ();
			fitheight = sc.Number;
		}
		else
		{
			sc.UnGet ();
		}
	}
	if (sc.GetString())
	{
		if (sc.Compare("WorldPanning"))
		{
			viewer->bWorldPanning = true;
		}
		else
		{
			sc.UnGet();
		}
	}
	viewer->SetScaledSize(fitwidth, fitheight);
}

DAnimatedDoor::DAnimatedDoor (sector_t *sec, line_t *line, int speed, int delay, FDoorAnimation *anim, DAnimatedDoor::EADType type)
	: DMovingCeiling (sec, false)
{
	double topdist;
	FTextureID picnum;

	m_DoorAnim = anim;

	m_Line1 = line;
	m_Line2 = line;

	for (auto l : sec->Lines)
	{
		if (l == line)
			continue;

		if (l->sidedef[0]->GetTexture(side_t::top) == line->sidedef[0]->GetTexture(side_t::top))
		{
			m_Line2 = l;
			break;
		}
	}


	auto &tex1 = m_Line1->sidedef[0]->textures;
	tex1[side_t::mid].InitFrom(tex1[side_t::top]);

	auto &tex2 = m_Line2->sidedef[0]->textures;
	tex2[side_t::mid].InitFrom(tex2[side_t::top]);

	picnum = tex1[side_t::top].texture;

	// don't forget texture scaling here!
	FTexture *tex = TexMan[picnum];
	topdist = tex ? tex->GetScaledHeight() : 64;

	topdist = m_Sector->ceilingplane.fD() - topdist * m_Sector->ceilingplane.fC();

	m_Type = type;
	m_Status = type == adClose? Waiting : Opening;
	m_Speed = speed;
	m_Delay = delay;
	m_Timer = m_Speed;
	m_Frame = 0;
	m_SetBlocking1 = !!(m_Line1->flags & ML_BLOCKING);
	m_SetBlocking2 = !!(m_Line2->flags & ML_BLOCKING);
	m_Line1->flags |= ML_BLOCKING;
	m_Line2->flags |= ML_BLOCKING;
	m_BotDist = m_Sector->ceilingplane.fD();
	m_Sector->MoveCeiling (2048., topdist, 1);
	if (type == adOpenClose)
	{
		if (m_DoorAnim->OpenSound != NAME_None)
		{
			SN_StartSequence(m_Sector, CHAN_INTERIOR, m_DoorAnim->OpenSound, 1);
		}
	}
}

DAnimatedDoor::DAnimatedDoor (sector_t *sec, line_t *line, int speed, int delay)
	: DMovingCeiling (sec)
{
	fixed_t topdist;
	FTextureID picnum;

	// The DMovingCeiling constructor automatically sets up an interpolation for us.
	// Stop it, since the ceiling is moving instantly here.
	StopInterpolation();
	m_WhichDoorIndex = P_FindSlidingDoorType (line->sidedef[0]->GetTexture(side_t::top));
	if (m_WhichDoorIndex < 0)
	{
		Printf ("EV_SlidingDoor: Textures are not defined for sliding door!");
		m_Status = Dead;
		return;
	}

	m_Line1 = line;
	m_Line2 = line;

	for (int i = 0; i < sec->linecount; ++i)
	{
		if (sec->lines[i] == line)
			continue;

		if (sec->lines[i]->sidedef[0]->GetTexture(side_t::top) == line->sidedef[0]->GetTexture(side_t::top))
		{
			m_Line2 = sec->lines[i];
			break;
		}
	}


	picnum = m_Line1->sidedef[0]->GetTexture(side_t::top);
	m_Line1->sidedef[0]->SetTexture(side_t::mid, picnum);
	m_Line2->sidedef[0]->SetTexture(side_t::mid, picnum);

	// don't forget texture scaling here!
	FTexture *tex = TexMan[picnum];
	topdist = tex ? tex->GetScaledHeight() : 64;

	topdist = m_Sector->ceilingplane.d - topdist * m_Sector->ceilingplane.c;

	m_Status = Opening;
	m_Speed = speed;
	m_Delay = delay;
	m_Timer = m_Speed;
	m_Frame = 0;
	m_Line1->flags |= ML_BLOCKING;
	m_Line2->flags |= ML_BLOCKING;
	m_BotDist = m_Sector->ceilingplane.d;
	MoveCeiling (2048*FRACUNIT, topdist, 1);
	if (DoorAnimations[m_WhichDoorIndex].OpenSound != NAME_None)
	{
		SN_StartSequence (m_Sector, CHAN_INTERIOR, DoorAnimations[m_WhichDoorIndex].OpenSound, 1);
	}
}

double GetBottomAlignOffset(FFont *font, int c)
{
	int w;
	FTexture *tex_zero = font->GetChar('0', CR_UNDEFINED, &w);
	FTexture *texc = font->GetChar(c, CR_UNDEFINED, &w);
	double offset = 0;
	if (texc) offset += texc->GetDisplayTopOffsetDouble();
	if (tex_zero) offset += -tex_zero->GetDisplayTopOffsetDouble() + tex_zero->GetDisplayHeightDouble();
	return offset;
}

void DIntermissionScreenScroller::Drawer ()
{
	FTexture *tex = TexMan[mFirstPic];
	FTexture *tex2 = TexMan[mSecondPic];
	if (mTicker >= mScrollDelay && mTicker < mScrollDelay + mScrollTime && tex != NULL && tex2 != NULL)
	{

		int fwidth = tex->GetScaledWidth();
		int fheight = tex->GetScaledHeight();

		double xpos1 = 0, ypos1 = 0, xpos2 = 0, ypos2 = 0;

		switch (mScrollDir)
		{
		case SCROLL_Up:
			ypos1 = double(mTicker - mScrollDelay) * fheight / mScrollTime;
			ypos2 = ypos1 - fheight;
			break;

		case SCROLL_Down:
			ypos1 = -double(mTicker - mScrollDelay) * fheight / mScrollTime;
			ypos2 = ypos1 + fheight;
			break;

		case SCROLL_Left:
		default:
			xpos1 = double(mTicker - mScrollDelay) * fwidth / mScrollTime;
			xpos2 = xpos1 - fwidth;
			break;

		case SCROLL_Right:
			xpos1 = -double(mTicker - mScrollDelay) * fwidth / mScrollTime;
			xpos2 = xpos1 + fwidth;
			break;
		}

		screen->DrawTexture (tex, xpos1, ypos1,
			DTA_VirtualWidth, fwidth,
			DTA_VirtualHeight, fheight,
			DTA_Masked, false,
			TAG_DONE);
		screen->DrawTexture (tex2, xpos2, ypos2,
			DTA_VirtualWidth, fwidth,
			DTA_VirtualHeight, fheight,
			DTA_Masked, false,
			TAG_DONE);

		screen->FillBorder (NULL);
		mBackground = mSecondPic;
	}
	else 
	{
		Super::Drawer();
	}
}

int WI_drawNum (int x, int y, int n, int digits, bool leadingzeros = true)
{
	// if non-number, do not draw it
	if (n == 1994)
		return 0;

	int fontwidth = num[3]->GetWidth();
	int xofs;
	char text[8];
	char *text_p;

	if (leadingzeros)
	{
		sprintf (text, "%07d", n);
	}
	else
	{
		sprintf (text, "%7d", n);
		if (digits < 0)
		{
			text_p = strrchr (text, ' ');
			digits = (text_p == NULL) ? 7 : 6 - (int)(text_p - text);
			x -= digits * fontwidth;
		}
	}

	text_p = strchr (text, '-');
	if (text_p == NULL || text_p - text > 7 - digits)
	{
		text_p = text + 7 - digits;
	}

	xofs = x;

	if (*text_p == '-')
	{
		x -= fontwidth;
		WI_DrawCharPatch (wiminus, x, y);
	}

	// draw the new number
	while (*text_p)
	{
		if (*text_p >= '0' && *text_p <= '9')
		{
			FTexture *p = num[*text_p - '0'];
			WI_DrawCharPatch (p, xofs + (fontwidth - p->GetWidth())/2, y);
		}
		text_p++;
		xofs += fontwidth;
	}
	return x;

}

// Examines the lump contents to decide what type of texture to create,
// and creates the texture.
FTexture * FTexture::CreateTexture (int lumpnum, int usetype)
{
	static TexCreateInfo CreateInfo[]={
		{ IMGZTexture_TryCreate,		TEX_Any },
		{ PNGTexture_TryCreate,			TEX_Any },
		{ JPEGTexture_TryCreate,		TEX_Any },
		{ DDSTexture_TryCreate,			TEX_Any },
		{ PCXTexture_TryCreate,			TEX_Any },
		{ TGATexture_TryCreate,			TEX_Any },
		{ RawPageTexture_TryCreate,		TEX_MiscPatch },
		{ FlatTexture_TryCreate,		TEX_Flat },
		{ PatchTexture_TryCreate,		TEX_Any },
		{ EmptyTexture_TryCreate,		TEX_Any },
		{ AutomapTexture_TryCreate,		TEX_MiscPatch },
	};

	if (lumpnum == -1) return NULL;

	FWadLump data = Wads.OpenLumpNum (lumpnum);

	for(size_t i = 0; i < countof(CreateInfo); i++)
	{
		if ((CreateInfo[i].usetype == usetype || CreateInfo[i].usetype == TEX_Any))
		{
			FTexture * tex = CreateInfo[i].TryCreate(data, lumpnum);
			if (tex != NULL) 
			{
				tex->UseType = usetype;
				if (usetype == FTexture::TEX_Flat) 
				{
					int w = tex->GetWidth();
					int h = tex->GetHeight();

					// Auto-scale flats with dimensions 128x128 and 256x256.
					// In hindsight, a bad idea, but RandomLag made it sound better than it really is.
					// Now we're stuck with this stupid behaviour.
					if (w==128 && h==128) 
					{
						tex->xScale = tex->yScale = 2*FRACUNIT;
						tex->bWorldPanning = true;
					}
					else if (w==256 && h==256) 
					{
						tex->xScale = tex->yScale = 4*FRACUNIT;
						tex->bWorldPanning = true;
					}
				}
				return tex;
			}
		}
	}
	return NULL;
}

DAnimatedDoor::DAnimatedDoor (sector_t *sec, line_t *line, int speed, int delay, FDoorAnimation *anim)
	: DMovingCeiling (sec)
{
	fixed_t topdist;
	FTextureID picnum;

	// The DMovingCeiling constructor automatically sets up an interpolation for us.
	// Stop it, since the ceiling is moving instantly here.
	StopInterpolation();
	m_DoorAnim = anim;

	m_Line1 = line;
	m_Line2 = line;

	for (int i = 0; i < sec->linecount; ++i)
	{
		if (sec->lines[i] == line)
			continue;

		if (sec->lines[i]->sidedef[0]->GetTexture(side_t::top) == line->sidedef[0]->GetTexture(side_t::top))
		{
			m_Line2 = sec->lines[i];
			break;
		}
	}


	picnum = m_Line1->sidedef[0]->GetTexture(side_t::top);
	m_Line1->sidedef[0]->SetTexture(side_t::mid, picnum);
	m_Line2->sidedef[0]->SetTexture(side_t::mid, picnum);

	// don't forget texture scaling here!
	FTexture *tex = TexMan[picnum];
	topdist = tex ? tex->GetScaledHeight() : 64;

	topdist = m_Sector->ceilingplane.d - topdist * m_Sector->ceilingplane.c;

	m_Status = Opening;
	m_Speed = speed;
	m_Delay = delay;
	m_Timer = m_Speed;
	m_Frame = 0;
	m_SetBlocking1 = !!(m_Line1->flags & ML_BLOCKING);
	m_SetBlocking2 = !!(m_Line2->flags & ML_BLOCKING);
	m_Line1->flags |= ML_BLOCKING;
	m_Line2->flags |= ML_BLOCKING;
	m_BotDist = m_Sector->ceilingplane.d;
	MoveCeiling (2048*FRACUNIT, topdist, 1);
	if (m_DoorAnim->OpenSound != NAME_None)
	{
		SN_StartSequence (m_Sector, CHAN_INTERIOR, m_DoorAnim->OpenSound, 1);
	}
}

static void DrawOneWeapon(player_t * CPlayer, int x, int & y, AWeapon * weapon)
{
	int trans;
	FTextureID picnum;

	// Powered up weapons and inherited sister weapons are not displayed.
	if (weapon->WeaponFlags & WIF_POWERED_UP) return;
	if (weapon->SisterWeapon && weapon->IsKindOf(RUNTIME_TYPE(weapon->SisterWeapon))) return;

	trans=0x6666;
	if (CPlayer->ReadyWeapon)
	{
		if (weapon==CPlayer->ReadyWeapon || weapon==CPlayer->ReadyWeapon->SisterWeapon) trans=0xd999;
	}

	FState * state=NULL, *ReadyState;
	
	FTextureID AltIcon = GetHUDIcon(weapon->GetClass());
	picnum = !AltIcon.isNull()? AltIcon : weapon->Icon;

	if (picnum.isNull())
	{
		if (weapon->SpawnState && weapon->SpawnState->sprite!=0)
		{
			state = weapon->SpawnState;
		}
		// no spawn state - now try the ready state
		else if ((ReadyState = weapon->FindState(NAME_Ready)) && ReadyState->sprite!=0)
		{
			state = ReadyState;
		}
		if (state &&  (unsigned)state->sprite < (unsigned)sprites.Size ())
		{
			spritedef_t * sprdef = &sprites[state->sprite];
			spriteframe_t * sprframe = &SpriteFrames[sprdef->spriteframes + state->GetFrame()];

			picnum = sprframe->Texture[0];
		}
	}

	if (picnum.isValid())
	{
		FTexture * tex = TexMan[picnum];
		int w = tex->GetWidth();
		int h = tex->GetHeight();
		int rh;
		if (w>h) rh=8;
		else rh=16,y-=8;		// don't draw tall sprites too small!
		DrawImageToBox(tex, x-24, y, 20, rh, trans);
		y-=10;
	}
}