mirror of https://github.com/mosra/magnum.git
Browse Source
Solves another trivial choice (similar to the one with TextureFormat
etc. in 7de45c98b1), less typing and also
preparation for ARB_sampler_objects extension.
pull/278/head
Vladimír Vondruš
13 years ago
11 changed files with 249 additions and 170 deletions
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/*
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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#include "Sampler.h" |
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#include "Context.h" |
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#include "Implementation/State.h" |
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#include "Implementation/TextureState.h" |
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namespace Magnum { |
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/* Check correctness of binary OR in setMinificationFilter(). If nobody fucks
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anything up, this assert should produce the same results on all dimensions, |
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thus testing only on AbstractTexture. */ |
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#define filter_or(filter, mipmap) (GLint(Sampler::Filter::filter)|GLint(Sampler::Mipmap::mipmap)) |
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static_assert((filter_or(Nearest, Base) == GL_NEAREST) && |
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(filter_or(Nearest, Nearest) == GL_NEAREST_MIPMAP_NEAREST) && |
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(filter_or(Nearest, Linear) == GL_NEAREST_MIPMAP_LINEAR) && |
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(filter_or(Linear, Base) == GL_LINEAR) && |
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(filter_or(Linear, Nearest) == GL_LINEAR_MIPMAP_NEAREST) && |
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(filter_or(Linear, Linear) == GL_LINEAR_MIPMAP_LINEAR), |
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"Unsupported constants for GL texture filtering"); |
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#undef filter_or |
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#ifndef MAGNUM_TARGET_GLES3 |
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Float Sampler::maxSupportedAnisotropy() { |
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GLfloat& value = Context::current()->state()->texture->maxSupportedAnisotropy; |
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/** @todo Re-enable when extension header is available */ |
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#ifndef MAGNUM_TARGET_GLES |
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/* Get the value, if not already cached */ |
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if(value == 0.0f) |
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glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &value); |
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#endif |
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return value; |
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} |
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#endif |
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} |
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#ifndef Magnum_Sampler_h |
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#define Magnum_Sampler_h |
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/*
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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/** @file
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* @brief Class Magnum::Sampler |
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*/ |
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#include "Types.h" |
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#include "OpenGL.h" |
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namespace Magnum { |
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/**
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@brief %Texture sampler |
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@see Texture, CubeMapTexture, CubeMapTextureArray |
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*/ |
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class Sampler { |
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public: |
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/**
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* @brief %Texture filtering |
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* |
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* @see setMagnificationFilter() and setMinificationFilter() |
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*/ |
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enum class Filter: GLint { |
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Nearest = GL_NEAREST, /**< Nearest neighbor filtering */ |
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/**
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* Linear interpolation filtering. |
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* @requires_gles30 %Extension @es_extension{OES,texture_float_linear} / |
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* @es_extension2{OES,texture_half_float_linear,OES_texture_float_linear} |
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* for linear interpolation of textures with |
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* @ref Magnum::TextureFormat "TextureFormat::HalfFloat" / |
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* @ref Magnum::TextureFormat "TextureFormat::Float" in OpenGL |
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* ES 2.0. |
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*/ |
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Linear = GL_LINEAR |
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}; |
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/**
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* @brief Mip level selection |
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* |
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* @see setMinificationFilter() |
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*/ |
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enum class Mipmap: GLint { |
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Base = GL_NEAREST & ~GL_NEAREST, /**< Select base mip level */ |
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/**
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* Select nearest mip level. **Unavailable on rectangle textures.** |
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*/ |
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Nearest = GL_NEAREST_MIPMAP_NEAREST & ~GL_NEAREST, |
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/**
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* Linear interpolation of nearest mip levels. **Unavailable on |
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* rectangle textures.** |
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* @requires_gles30 %Extension @es_extension{OES,texture_float_linear} / |
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* @es_extension2{OES,texture_half_float_linear,OES_texture_float_linear} |
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* for linear interpolation of textures with |
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* @ref Magnum::TextureFormat "TextureFormat::HalfFloat" / |
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* @ref Magnum::TextureFormat "TextureFormat::Float" in OpenGL |
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* ES 2.0. |
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*/ |
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Linear = GL_NEAREST_MIPMAP_LINEAR & ~GL_NEAREST |
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}; |
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/**
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* @brief %Texture wrapping |
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* |
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* @see setWrapping() |
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*/ |
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enum class Wrapping: GLint { |
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/** Repeat texture. **Unavailable on rectangle textures.** */ |
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Repeat = GL_REPEAT, |
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/**
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* Repeat mirrored texture. **Unavailable on rectangle textures.** |
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*/ |
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MirroredRepeat = GL_MIRRORED_REPEAT, |
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/**
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* Clamp to edge. Coordinates out of the range will be clamped to |
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* first / last column / row in given direction. |
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*/ |
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ClampToEdge = GL_CLAMP_TO_EDGE, |
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#ifndef MAGNUM_TARGET_GLES3 |
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/**
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* Clamp to border color. Coordinates out of range will be clamped |
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* to border color (set with setBorderColor()). |
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* @requires_es_extension %Extension @es_extension{NV,texture_border_clamp} |
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*/ |
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#ifndef MAGNUM_TARGET_GLES |
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ClampToBorder = GL_CLAMP_TO_BORDER |
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#else |
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ClampToBorder = GL_CLAMP_TO_BORDER_NV |
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#endif |
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#endif |
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}; |
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#ifndef MAGNUM_TARGET_GLES3 |
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/**
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* @brief Max supported anisotropy |
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* |
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* The result is cached, repeated queries don't result in repeated |
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* OpenGL calls. |
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* @see setMaxAnisotropy(), @fn_gl{Get} with @def_gl{MAX_TEXTURE_MAX_ANISOTROPY_EXT} |
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* @requires_extension %Extension @extension{EXT,texture_filter_anisotropic} |
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* @requires_es_extension %Extension @es_extension2{EXT,texture_filter_anisotropic,texture_filter_anisotropic} |
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*/ |
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static Float maxSupportedAnisotropy(); |
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#endif |
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}; |
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} |
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#endif |
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