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apps/Viewer/Image.cpp

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+/*
+ * Image.cpp
+ *
+ * Copyright (c) 2014-2015 SEACAVE
+ *
+ * Author(s):
+ *
+ *      cDc <cdc.seacave@gmail.com>
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Additional Terms:
+ *
+ *      You are required to preserve legal notices and author attributions in
+ *      that material or in the Appropriate Legal Notices displayed by works
+ *      containing it.
+ */
+
+#include "Common.h"
+#include "Image.h"
+
+using namespace VIEWER;
+
+
+// D E F I N E S ///////////////////////////////////////////////////
+
+
+// S T R U C T S ///////////////////////////////////////////////////
+
+Image::Image(MVS::IIndex _idx)
+	:
+	idx(_idx),
+	texture(0)
+{
+}
+Image::~Image()
+{
+	Release();
+}
+
+void Image::Release()
+{
+	if (IsValid()) {
+		glDeleteTextures(1, &texture);
+		texture = 0;
+	}
+	ReleaseImage();
+}
+void Image::ReleaseImage()
+{
+	if (IsImageValid()) {
+		cv::Mat* const p(pImage);
+		Thread::safeExchange(pImage.ptr, (int_t)IMG_NULL);
+		delete p;
+	}
+}
+
+void Image::SetImageLoading()
+{
+	ASSERT(IsImageEmpty());
+	Thread::safeExchange(pImage.ptr, (int_t)IMG_LOADING);
+}
+void Image::AssignImage(cv::InputArray img)
+{
+	ASSERT(IsImageLoading());
+	ImagePtrInt pImg(new cv::Mat(img.getMat()));
+	if (pImg.pImage->cols%4 != 0) {
+		// make sure the width is multiple of 4 (seems to be an OpenGL limitation)
+		cv::resize(*pImg.pImage, *pImg.pImage, cv::Size((pImg.pImage->cols/4)*4, pImg.pImage->rows), 0, 0, cv::INTER_AREA);
+	}
+	Thread::safeExchange(pImage.ptr, pImg.ptr);
+}
+bool Image::TransferImage()
+{
+	if (!IsImageValid())
+		return false;
+	SetImage(*pImage);
+	glfwPostEmptyEvent();
+	ReleaseImage();
+	return true;
+}
+
+void Image::SetImage(cv::InputArray img)
+{
+	cv::Mat image(img.getMat());
+	glEnable(GL_TEXTURE_2D);
+	// create texture
+	glGenTextures(1, &texture);
+	// select our current texture
+	glBindTexture(GL_TEXTURE_2D, texture);
+	// load texture
+	width = image.cols;
+	height = image.rows;
+	ASSERT(image.channels() == 1 || image.channels() == 3);
+	ASSERT(image.isContinuous());
+	glTexImage2D(GL_TEXTURE_2D,
+				 0, image.channels(),
+				 width, height,
+				 0, (image.channels() == 1) ? GL_LUMINANCE : GL_BGR,
+				 GL_UNSIGNED_BYTE, image.ptr<uint8_t>());
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+}
+void Image::GenerateMipmap() const {
+	glBindTexture(GL_TEXTURE_2D, texture);
+	glGenerateMipmap(GL_TEXTURE_2D);
+}
+void Image::Bind() const {
+	glBindTexture(GL_TEXTURE_2D, texture);
+}
+/*----------------------------------------------------------------*/