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// Copyright 2021, 2022 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/draw.h"
#include <assert.h>
#include "src/gl/error.h"
#include "src/gl/vertex_array.h"
#include "src/util.h"
#include "third_party/glew/include/GL/glew.h"
namespace gl {
void DrawElements(const gl::VertexArray& vao, Primitive mode) {
gl_internal::CheckThreadSafety();
GLenum type;
switch (vao.element_buffer().element_size()) {
case 1:
type = GL_UNSIGNED_BYTE;
break;
case 2:
type = GL_UNSIGNED_SHORT;
break;
case 4:
type = GL_UNSIGNED_INT;
break;
default:
assert(false);
};
glDrawElements(FromEnum(mode), vao.element_buffer().size(), type,
/*indices=*/0);
// This error check is necessary because the mode could be unsupported.
gl_internal::ErrorCheck();
}
void SetViewport(int x, int y, int width, int height) {
gl_internal::CheckThreadSafety();
glViewport(x, y, width, height);
gl_internal::ErrorCheck();
}
} // namespace gl
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