mirror of
https://github.com/mapmapteam/mapmap.git
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109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
/*
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* SourceGLCanvas.cpp
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*
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* (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
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*
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* This program 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 program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "SourceGLCanvas.h"
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SourceGLCanvas::SourceGLCanvas(QWidget* parent)
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: MapperGLCanvas(parent)
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{
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}
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void SourceGLCanvas::doDraw() {
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// TODO: Ceci est un hack necessaire car tout est en fonction de la width/height de la texture.
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// Il faut changer ca.
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std::tr1::shared_ptr<TextureMapping> textureMapping = std::tr1::static_pointer_cast<TextureMapping>(Common::currentMapping);
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Q_CHECK_PTR(textureMapping);
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std::tr1::shared_ptr<Texture> texture = std::tr1::static_pointer_cast<Texture>(textureMapping->getPaint());
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Q_CHECK_PTR(texture);
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if (texture->getTextureId() == 0) {
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texture->loadTexture();
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texture->setPosition( (width() - texture->getWidth()) / 2,
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(height() - texture->getHeight()) / 2 );
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}
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// Now, draw
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// DRAW THE TEXTURE
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glPushMatrix();
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// Enable blending mode (for alphas).
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glEnable (GL_BLEND);
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glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDisable (GL_LIGHTING);
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glEnable (GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, texture->getTextureId());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// TODO: Exact projection of texture
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// see http://stackoverflow.com/questions/15242507/perspective-correct-texturing-of-trapezoid-in-opengl-es-2-0
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// Draw source texture (not moving) in the center of the area.
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float centerX = (float)width() / 2.0f;
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float centerY = (float)height() / 2.0f;
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float textureHalfWidth = (float)texture->getWidth() / 2.0f;
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float textureHalfHeight = (float)texture->getHeight() / 2.0f;
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//printf("SRC: %f %f %f %f\n", centerX, centerY, textureHalfWidth, textureHalfHeight);
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glColor4f (1, 1, 1, 1.0f);
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glBegin (GL_QUADS);
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{
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glTexCoord2f (0, 0);
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glVertex3f (texture->getX(), texture->getY(), 0);
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glTexCoord2f (1, 0);
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glVertex3f (texture->getX()+texture->getWidth(), texture->getY(), 0);
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glTexCoord2f (1, 1);
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glVertex3f (texture->getX()+texture->getWidth(), texture->getY()+texture->getHeight(), 0);
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glTexCoord2f (0, 1);
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glVertex3f (texture->getX(), texture->getY()+texture->getHeight(), 0);
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}
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glEnd ();
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glDisable(GL_TEXTURE_2D);
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// Draw the quad.
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Quad& quad = getQuad();
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glColor4f(1, 0, 0, 1);
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// Source quad.
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// Source quad.
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glLineWidth(5);
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glBegin (GL_LINE_STRIP);
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{
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for (int i=0; i<5; i++) {
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glVertex3f(quad.getVertex(i % 4).x,
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quad.getVertex(i % 4).y,
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0);
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}
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}
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glEnd ();
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glPopMatrix();
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}
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