mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-12-16 07:21:28 +00:00
5bfcaab25c
SVN r3263 (trunk)
151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
/*
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** canvastexture.cpp
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** Texture class for camera textures
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**
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**---------------------------------------------------------------------------
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** Copyright 2004-2006 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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#include "doomtype.h"
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#include "files.h"
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#include "v_palette.h"
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#include "v_video.h"
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#include "textures/textures.h"
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FCanvasTexture::FCanvasTexture (const char *name, int width, int height)
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{
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strncpy (Name, name, 8);
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Name[8] = 0;
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Width = width;
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Height = height;
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LeftOffset = TopOffset = 0;
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CalcBitSize ();
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bMasked = false;
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DummySpans[0].TopOffset = 0;
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DummySpans[0].Length = height;
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DummySpans[1].TopOffset = 0;
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DummySpans[1].Length = 0;
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UseType = TEX_Wall;
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Canvas = NULL;
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bNeedsUpdate = true;
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bDidUpdate = false;
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bHasCanvas = true;
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bFirstUpdate = true;
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bPixelsAllocated = false;
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}
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FCanvasTexture::~FCanvasTexture ()
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{
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Unload ();
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}
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const BYTE *FCanvasTexture::GetColumn (unsigned int column, const Span **spans_out)
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{
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bNeedsUpdate = true;
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if (Canvas == NULL)
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{
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MakeTexture ();
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}
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if ((unsigned)column >= (unsigned)Width)
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{
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if (WidthMask + 1 == Width)
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{
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column &= WidthMask;
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}
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else
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{
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column %= Width;
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}
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}
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if (spans_out != NULL)
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{
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*spans_out = DummySpans;
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}
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return Pixels + column*Height;
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}
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const BYTE *FCanvasTexture::GetPixels ()
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{
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bNeedsUpdate = true;
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if (Canvas == NULL)
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{
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MakeTexture ();
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}
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return Pixels;
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}
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void FCanvasTexture::MakeTexture ()
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{
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Canvas = new DSimpleCanvas (Width, Height);
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Canvas->Lock ();
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GC::AddSoftRoot(Canvas);
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if (Width != Height || Width != Canvas->GetPitch())
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{
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Pixels = new BYTE[Width*Height];
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bPixelsAllocated = true;
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}
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else
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{
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Pixels = Canvas->GetBuffer();
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bPixelsAllocated = false;
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}
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// Draw a special "unrendered" initial texture into the buffer.
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memset (Pixels, 0, Width*Height/2);
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memset (Pixels+Width*Height/2, 255, Width*Height/2);
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}
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void FCanvasTexture::Unload ()
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{
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if (bPixelsAllocated)
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{
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if (Pixels != NULL) delete [] Pixels;
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bPixelsAllocated = false;
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Pixels = NULL;
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}
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if (Canvas != NULL)
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{
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GC::DelSoftRoot(Canvas);
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Canvas->Destroy();
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Canvas = NULL;
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}
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}
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bool FCanvasTexture::CheckModified ()
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{
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if (bDidUpdate)
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{
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bDidUpdate = false;
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return true;
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}
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return false;
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}
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