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// Copyright 2021 Benjamin Barenblat
//
// 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
//
// https://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.
#include "src/gl/vertex_array.h"
#include <stdint.h>
#include "src/gl/error.h"
#include "src/util.h"
#include "third_party/abseil/absl/strings/str_cat.h"
#include "third_party/glew/include/GL/glew.h"
namespace gl {
using ::gl_internal::CheckThreadSafety;
using ::gl_internal::ErrorCheck;
using ::gl_internal::UnnecessaryErrorCheck;
void VertexArray::SetVertexAttributeFormat(int index, int size,
VertexAttributeType type, int offset,
bool normalized) {
CheckThreadSafety();
glEnableVertexArrayAttrib(array_, index);
// An error check is necessary here because the index might be too large for
// OpenGL to handle, but it can be folded into a future error check.
UnnecessaryErrorCheck();
switch (type) {
case VertexAttributeType::kHalfFloat:
case VertexAttributeType::kFloat:
glVertexArrayAttribFormat(array_, index, size, FromEnum(type), normalized,
offset);
break;
case VertexAttributeType::kByte:
case VertexAttributeType::kShort:
case VertexAttributeType::kInt:
case VertexAttributeType::kFixed:
case VertexAttributeType::kUnsignedByte:
case VertexAttributeType::kUnsignedShort:
case VertexAttributeType::kUnsignedInt:
case VertexAttributeType::kInt2x10x10x10Rev:
case VertexAttributeType::kUnsignedInt2x10x10x10Rev:
case VertexAttributeType::kUnsignedInt10f11f11fRev:
glVertexArrayAttribIFormat(array_, index, size, FromEnum(type), offset);
break;
case VertexAttributeType::kDouble:
glVertexArrayAttribLFormat(array_, index, size, FromEnum(type), offset);
break;
default:
throw std::invalid_argument(
absl::StrCat("GL: invalid VertexAttributeType ", type));
}
// This error check is necessary because a wide variety of argument
// combinations are invalid.
ErrorCheck();
glVertexArrayAttribBinding(array_, index, /*bindingindex=*/0);
UnnecessaryErrorCheck();
}
} // namespace gl
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