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TINYGL: Improved code commenting.

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This commit is contained in:
Stefano Musumeci 2014-08-10 20:17:31 +02:00
parent ff488253e7
commit d747cad5b2
1 changed files with 41 additions and 1 deletions
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42
graphics/tinygl/zblit.cpp
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@ -184,7 +184,7 @@ public:
FORCEINLINE void tglBlitRotoScale(int dstX, int dstY, int width, int height, int srcX, int srcY, int srcWidth, int srcHeight, int rotation,
int originX, int originY, float aTint, float rTint, float gTint, float bTint);
//Utility function.
//Utility function that calls the correct blitting function.
template <bool disableBlending, bool disableColoring, bool disableTransform, bool flipVertical, bool flipHorizontal, bool enableAlphaBlending>
FORCEINLINE void tglBlitGeneric(const BlitTransform &transform) {
if (disableTransform) {
@ -381,6 +381,46 @@ FORCEINLINE void BlitImage::tglBlitSimple(int dstX, int dstY, int srcX, int srcY
}
}
/*
The below two functions are adapted from SDL_rotozoom.c,
taken from SDL_gfx-2.0.18.
Its copyright notice:
=============================================================================
SDL_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces
Copyright (C) 2001-2012 Andreas Schiffler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
Andreas Schiffler -- aschiffler at ferzkopp dot net
=============================================================================
The functions have been adapted for different structures and coordinate
systems.
*/
template <bool disableBlending, bool disableColoring, bool flipVertical, bool flipHorizontal>
FORCEINLINE void BlitImage::tglBlitScale(int dstX, int dstY, int width, int height, int srcX, int srcY, int srcWidth, int srcHeight,
float aTint, float rTint, float gTint, float bTint) {