- added texture class for handling the start. screen

src/CMakeLists.txt

@@ -1083,6 +1083,7 @@ set (PCH_SOURCES
 	common/textures/formats/tgatexture.cpp
 	common/textures/formats/stbtexture.cpp
 	common/textures/formats/anmtexture.cpp
+	common/textures/formats/startscreentexture.cpp
 	common/textures/hires/hqresize.cpp
 	common/models/models_md3.cpp
 	common/models/models_md2.cpp

src/gamedata/textures/formats/startscreentexture.cpp

@@ -0,0 +1,113 @@
+/*
+** startscreentexture.cpp
+** Texture class to create a texture from the start screen's imagé
+**
+**---------------------------------------------------------------------------
+** Copyright 2004-2006 Randy Heit
+** Copyright 2019 Christoph Oelckers
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions
+** are met:
+**
+** 1. Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in the
+**    documentation and/or other materials provided with the distribution.
+** 3. The name of the author may not be used to endorse or promote products
+**    derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**---------------------------------------------------------------------------
+**
+**
+*/
+
+#include "doomtype.h"
+#include "files.h"
+#include "w_wad.h"
+#include "gi.h"
+#include "bitmap.h"
+#include "textures/textures.h"
+#include "imagehelpers.h"
+#include "image.h"
+#include "st_start.h"
+
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+class FStartScreenTexture : public FImageSource
+{
+	BitmapInfo *info; // This must remain constant for the lifetime of this texture
+
+public:
+	FStartScreenTexture (BitmapInfo *srcdata);
+	int CopyPixels(FBitmap *bmp, int conversion) override;
+};
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+FImageSource *CreateStartScreenTexture(BitmapInfo *srcdata)
+{
+	return new FStartScreenTexture(srcdata);
+}
+
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+FStartScreenTexture::FStartScreenTexture (BitmapInfo *srcdata)
+: FImageSource(-1)
+{
+	Width = srcdata->bmiHeader.biWidth;
+	Height = srcdata->bmiHeader.biHeight;
+	info = srcdata;
+	bUseGamePalette = false;
+
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+int FStartScreenTexture::CopyPixels(FBitmap *bmp, int conversion)
+{
+	const RgbQuad *psource = info->bmiColors;
+	PalEntry paldata[256] = {};
+	auto pixels = ST_Util_BitsForBitmap(info);
+	for (uint32_t i = 0; i < info->bmiHeader.biClrUsed; i++)
+	{
+		PalEntry &pe = paldata[i];
+		pe.r = psource[i].rgbRed;
+		pe.g = psource[i].rgbGreen;
+		pe.b = psource[i].rgbBlue;
+		pe.a = 255;
+	}
+	bmp->CopyPixelData(0, 0, pixels, Width, Height, 1, (Width + 3) & ~3, 0, paldata);
+	
+	return 0;
+}