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Initial commit of ResInsight version 0.4.8
This commit is contained in:
Alf B. Rustad
382
VisualizationModules/LibRender/cvfOverlayTextBox.cpp
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382
VisualizationModules/LibRender/cvfOverlayTextBox.cpp
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//##################################################################################################
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//
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// Custom Visualization Core library
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// Copyright (C) 2011-2012 Ceetron AS
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//
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// This library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>>
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// for more details.
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//
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//##################################################################################################
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#include "cvfBase.h"
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#include "cvfOverlayTextBox.h"
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#include "cvfDrawableText.h"
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#include "cvfMatrixState.h"
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#include "cvfCamera.h"
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#include "cvfRenderState.h"
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#include "cvfShaderProgram.h"
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#include "cvfOpenGL.h"
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#include "cvfViewport.h"
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#include "cvfOpenGLResourceManager.h"
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#include "cvfUniform.h"
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#ifndef CVF_OPENGL_ES
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#include "cvfRenderState_FF.h"
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#endif
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namespace cvf {
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//==================================================================================================
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///
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/// \class cvf::OverlayTextBox
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/// \ingroup Render
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///
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/// An view overlay item capable of showing a text with optionally a border and a background
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///
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//==================================================================================================
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//--------------------------------------------------------------------------------------------------
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/// Constructor. The specified font is used to draw all the text
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//--------------------------------------------------------------------------------------------------
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OverlayTextBox::OverlayTextBox(Font* font)
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: m_size(200, 50),
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m_drawBackground(true),
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m_drawBorder(true),
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m_textColor(Color3::WHITE),
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m_backgroundColor(0.2f, 0.2f, 1.0f),
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m_borderColor(0.6f, 0.6f, 1.0f)
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{
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m_textDrawer = new TextDrawer(font);
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m_textDrawer->setVerticalAlignment(TextDrawer::CENTER);
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m_textDrawer->setDrawBackground(false);
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m_textDrawer->setDrawBorder(false);
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}
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//--------------------------------------------------------------------------------------------------
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/// Destructor
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//--------------------------------------------------------------------------------------------------
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OverlayTextBox::~OverlayTextBox()
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{
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the wanted size in pixels
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//--------------------------------------------------------------------------------------------------
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cvf::Vec2ui OverlayTextBox::sizeHint()
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{
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return m_size;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the maximum size of the text box in pixels
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//--------------------------------------------------------------------------------------------------
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cvf::Vec2ui OverlayTextBox::maximumSize()
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{
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return sizeHint();
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the minimum size of the text box in pixels
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//--------------------------------------------------------------------------------------------------
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cvf::Vec2ui OverlayTextBox::minimumSize()
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{
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return sizeHint();
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}
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//--------------------------------------------------------------------------------------------------
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/// Render using Shaders
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::render(OpenGLContext* oglContext, const Vec2ui& position, const Vec2ui& size)
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{
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render(oglContext, position, size, false);
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}
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//--------------------------------------------------------------------------------------------------
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/// Render using Fixed Function
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::renderSoftware(OpenGLContext* oglContext, const Vec2ui& position, const Vec2ui& size)
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{
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render(oglContext, position, size, true);
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::render(OpenGLContext* oglContext, const Vec2ui& position, const Vec2ui& size, bool software)
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{
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Mat4d ident;
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MatrixState matrixState(position, size, ident, ident);
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Vec2f textPos(0.0f, static_cast<float>(size.y())/2.0f);
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if (m_drawBorder || m_drawBackground)
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{
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renderBackgroundAndBorder(oglContext, position, size, software);
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textPos.x() = 4; // Allow for margin
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}
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// Set the text
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m_textDrawer->removeAllTexts();
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m_textDrawer->addText(m_text, textPos);
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m_textDrawer->setTextColor(m_textColor);
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// Draw the text
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if (software)
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{
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m_textDrawer->renderSoftware(oglContext, matrixState);
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}
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else
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{
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m_textDrawer->render(oglContext, matrixState);
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}
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::renderBackgroundAndBorder(OpenGLContext* oglContext, const Vec2ui& position, const Vec2ui& size, bool software)
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{
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CVF_CALLSITE_OPENGL(oglContext);
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// Prepare 2D pixel exact projection to draw texts
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Camera projCam;
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projCam.setViewport(position.x(), position.y(), size.x(), size.y());
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projCam.setProjectionAsPixelExact2D();
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projCam.setViewMatrix(Mat4d::IDENTITY);
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// Turn off depth test
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Depth depth(false, Depth::LESS, false);
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depth.applyOpenGL(oglContext);
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ref<ShaderProgram> backgroundShader;
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float vertexArray[12];
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projCam.viewport()->applyOpenGL(oglContext, Viewport::DO_NOT_CLEAR);
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if (software)
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{
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if (ShaderProgram::supportedOpenGL(oglContext))
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{
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ShaderProgram::useNoProgram(oglContext);
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}
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#ifndef CVF_OPENGL_ES
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Material_FF mat;
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mat.enableColorMaterial(true);
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mat.applyOpenGL(oglContext);
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Lighting_FF light(false);
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light.applyOpenGL(oglContext);
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#endif
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projCam.applyOpenGL();
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}
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else
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{
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glEnableVertexAttribArray(ShaderProgram::VERTEX);
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glVertexAttribPointer(ShaderProgram::VERTEX, 3, GL_FLOAT, GL_FALSE, 0, vertexArray);
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backgroundShader = oglContext->resourceManager()->getLinkedUnlitColorShaderProgram(oglContext);
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if (backgroundShader->useProgram(oglContext))
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{
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MatrixState projMatrixState(projCam);
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backgroundShader->clearUniformApplyTracking();
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backgroundShader->applyFixedUniforms(oglContext, projMatrixState);
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}
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}
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Vec3f min(1.0f, 1.0f, 0.0f);
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Vec3f max(static_cast<float>(size.x() - 1), static_cast<float>(size.y() - 1), 0.0f);
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// Setup the vertex array
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float* v1 = &vertexArray[0];
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float* v2 = &vertexArray[3];
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float* v3 = &vertexArray[6];
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float* v4 = &vertexArray[9];
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v1[0] = min.x(); v1[1] = min.y(); v1[2] = 0.0f;
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v2[0] = max.x(); v2[1] = min.y(); v2[2] = 0.0f;
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v3[0] = max.x(); v3[1] = max.y(); v3[2] = 0.0f;
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v4[0] = min.x(); v4[1] = max.y(); v4[2] = 0.0f;
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if (m_drawBackground)
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{
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if (software)
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{
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#ifndef CVF_OPENGL_ES
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glColor4fv(m_backgroundColor.ptr());
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glBegin(GL_TRIANGLE_FAN);
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glVertex3fv(v1);
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glVertex3fv(v2);
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glVertex3fv(v3);
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glVertex3fv(v4);
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glEnd();
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#endif
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}
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else
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{
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// Draw background
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UniformFloat backgroundColor("u_color", Color4f(m_backgroundColor));
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backgroundShader->applyUniform(oglContext, backgroundColor);
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glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
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}
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}
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if (m_drawBorder)
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{
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if (software)
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{
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#ifndef CVF_OPENGL_ES
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glColor3fv(m_borderColor.ptr());
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glBegin(GL_LINE_LOOP);
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glVertex3fv(v1);
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glVertex3fv(v2);
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glVertex3fv(v3);
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glVertex3fv(v4);
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glEnd();
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#endif
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}
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else
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{
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UniformFloat borderColor("u_color", Color4f(m_borderColor));
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backgroundShader->applyUniform(oglContext, borderColor);
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// Draw border
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glDrawArrays(GL_LINE_LOOP, 0, 4);
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}
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}
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}
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//--------------------------------------------------------------------------------------------------
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/// Set the text to draw in the box
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setText(const String& text)
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{
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m_text = text;
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}
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//--------------------------------------------------------------------------------------------------
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/// Set the size (in pixels) of the text box
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setSize( const Vec2ui& size )
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{
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m_size = size;
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}
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//--------------------------------------------------------------------------------------------------
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/// Set the text color
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setTextColor(const Color3f& color)
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{
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m_textColor = color;
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}
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//--------------------------------------------------------------------------------------------------
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/// Set the background color of the text box
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setBackgroundColor(const Color3f& color)
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{
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m_backgroundColor = color;
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}
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//--------------------------------------------------------------------------------------------------
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/// Set the border color of the text box
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setBorderColor(const Color3f& color)
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{
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m_borderColor = color;
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}
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//--------------------------------------------------------------------------------------------------
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/// Set if a filled background of the text box should be drawn or not
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setDrawBackground(bool drawBackground)
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{
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m_drawBackground = drawBackground;
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}
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//--------------------------------------------------------------------------------------------------
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/// Set if the border of the text box should be drawn or not
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//--------------------------------------------------------------------------------------------------
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void OverlayTextBox::setDrawBorder(bool drawBorder)
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{
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m_drawBorder = drawBorder;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the text shown in the text box
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//--------------------------------------------------------------------------------------------------
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String OverlayTextBox::text() const
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{
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return m_text;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the color used to draw the text
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//--------------------------------------------------------------------------------------------------
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Color3f OverlayTextBox::textColor() const
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{
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return m_textColor;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the color of the background
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//--------------------------------------------------------------------------------------------------
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Color3f OverlayTextBox::backgroundColor() const
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{
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return m_backgroundColor;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns the color of the border.
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//--------------------------------------------------------------------------------------------------
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Color3f OverlayTextBox::borderColor() const
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{
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return m_borderColor;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns true if the background will be drawn
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//--------------------------------------------------------------------------------------------------
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bool OverlayTextBox::drawBackground() const
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{
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return m_drawBackground;
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}
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//--------------------------------------------------------------------------------------------------
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/// Returns true if the border will be drawn
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//--------------------------------------------------------------------------------------------------
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bool OverlayTextBox::drawBorder() const
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{
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return m_drawBorder;
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}
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} // namespace cvf
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