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/*
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef GLIMP_GLES_SAMPLER_H_
#define GLIMP_GLES_SAMPLER_H_
#include "nb/ref_counted.h"
namespace glimp {
namespace gles {
// Helper function to represent what GL ES texture parameters.
struct Sampler {
enum MinFilter {
kMinFilterNearest,
kMinFilterLinear,
kMinFilterNearestMipMapNearest,
kMinFilterLinearMipMapNearest,
kMinFilterNearestMipMapLinear,
kMinFilterLinearMipMapLinear,
kMinFilterInvalid,
};
enum MagFilter {
kMagFilterNearest,
kMagFilterLinear,
kMagFilterInvalid,
};
enum WrapMode {
kWrapModeRepeat,
kWrapModeClampToEdge,
kWrapModeMirroredRepeat,
kWrapModeInvalid,
};
// Initialize the sampler with default values defined by the GL ES
// specification:
// https://www.khronos.org/opengles/sdk/docs/man/xhtml/glTexParameter.xml
Sampler()
: mag_filter(kMagFilterLinear),
min_filter(kMinFilterNearestMipMapLinear),
wrap_s(kWrapModeRepeat),
wrap_t(kWrapModeRepeat) {}
// Parameters that are modifiable via glTexParameter() functions.
MagFilter mag_filter;
MinFilter min_filter;
WrapMode wrap_s;
WrapMode wrap_t;
};
} // namespace gles
} // namespace glimp
#endif // GLIMP_GLES_SAMPLER_H_