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65 lines
2 KiB
C++
65 lines
2 KiB
C++
/*
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** Frame buffers
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** Copyright (c) 2016 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#pragma once
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#include <vector>
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struct TriVertex;
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class PolyZBuffer
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{
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public:
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static PolyZBuffer *Instance();
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void Resize(int newwidth, int newheight);
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int Width() const { return width; }
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int Height() const { return height; }
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int BlockWidth() const { return (width + 7) / 8; }
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int BlockHeight() const { return (height + 7) / 8; }
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float *Values() { return values.data(); }
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private:
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int width;
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int height;
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std::vector<float> values;
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};
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class PolyStencilBuffer
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{
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public:
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static PolyStencilBuffer *Instance();
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void Clear(int newwidth, int newheight, uint8_t stencil_value = 0);
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int Width() const { return width; }
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int Height() const { return height; }
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int BlockWidth() const { return (width + 7) / 8; }
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int BlockHeight() const { return (height + 7) / 8; }
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uint8_t *Values() { return values.data(); }
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uint32_t *Masks() { return masks.data(); }
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private:
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int width;
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int height;
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// 8x8 blocks of stencil values, plus a mask for each block indicating if values are the same for early out stencil testing
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std::vector<uint8_t> values;
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std::vector<uint32_t> masks;
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};
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