55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the terms set forth in the LICENSE.txt file available at
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// https://opensubdiv.org/license.
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//
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#ifndef OPENSUBDIV_EXAMPLES_GL_PTEX_MIPMAP_TEXTURE_H
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#define OPENSUBDIV_EXAMPLES_GL_PTEX_MIPMAP_TEXTURE_H
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#include "glLoader.h"
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#include <opensubdiv/osd/nonCopyable.h>
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#include <Ptexture.h>
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#include <stdlib.h>
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class GLPtexMipmapTexture : OpenSubdiv::Osd::NonCopyable<GLPtexMipmapTexture> {
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public:
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static GLPtexMipmapTexture * Create(PtexTexture * reader,
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int maxLevels=-1,
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size_t targetMemory=0);
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/// Returns GLSL shader snippet to fetch ptex
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static const char *GetShaderSource();
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/// Returns the texture buffer containing the layout of the ptex faces
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/// in the texels texture array.
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GLuint GetLayoutTextureBuffer() const { return _layout; }
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/// Returns the texels texture array.
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GLuint GetTexelsTexture() const { return _texels; }
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/// Returns the amount of allocated memory (in bytes)
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size_t GetMemoryUsage() const { return _memoryUsage; }
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~GLPtexMipmapTexture();
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private:
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GLPtexMipmapTexture();
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GLsizei _width, // width / height / depth of the 3D texel buffer
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_height,
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_depth;
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GLint _format; // texel color format
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GLuint _layout, // per-face lookup table
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_texels; // texel data
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size_t _memoryUsage; // total amount of memory used (estimate)
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};
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#endif // OPENSUBDIV_EXAMPLES_GL_PTEX_MIPMAP_TEXTURE_H
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