src/gl/gridprogram.h

Wed, 25 May 2022 20:36:34 +0300

author
Teemu Piippo <teemu@hecknology.net>
date
Wed, 25 May 2022 20:36:34 +0300
changeset 199
6988973515d2
parent 156
65b75beed7e0
child 216
c7241f504117
permissions
-rw-r--r--

Fix pick() picking from weird places on the screen with high DPI scaling

glReadPixels reads data from the frame buffer, which contains data after
high DPI scaling, so any reads to that need to take this scaling into account

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2020 Teemu Piippo
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once
#include "basicshaderprogram.h"
#include "common.h"

class GridProgram : public AbstractBasicShaderProgram
{
	Q_OBJECT
public:
	GridProgram(QObject* parent = nullptr);
	void setGridMatrix(const glm::mat4& newGridMatrix);
	void setGridColor(const QColor& newGridColor);
protected:
	const char* vertexShaderSource() const override;
	const char* fragmentShaderSource() const override;
	const void* vertexData() const override;
	int vertexSize() const override;
	int vertexCount() const override;
	void setupVertexArrays() override;
	GLenum drawMode() const override;
	QOpenGLBuffer::UsagePattern usagePattern() const override;
private:
	glm::vec4 gridColor = {1.0f, 1.0f, 1.0f, 0.75f};
	std::vector<glm::vec2> gridData;
};

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