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2df0738cce
* qt autoconf * WIP: Qt5 makefile * go away cmake * testing bsd define * readme * replacing __linux__ with __unix__ * sdl/libGLU * Revert "WIP: Qt5 makefile" This reverts commitaaa44566b9. * Revert "qt autoconf" This reverts commita82dae3c54. * Revert "go away cmake" This reverts commit1392d5e658. * fix amflags for m4 dir * opengl header * opengl header * use one header for dealing with cross-platform GL includes * include opengl header in dist * fix _WIN32 (maybe?)
80 lines
1.6 KiB
C++
80 lines
1.6 KiB
C++
/*
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* VideoEcho.cpp
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*
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* Created on: Jun 29, 2008
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* Author: pete
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*/
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#include "VideoEcho.hpp"
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VideoEcho::VideoEcho(): a(0), zoom(1), orientation(Normal)
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{
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// TODO Auto-generated constructor stub
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}
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VideoEcho::~VideoEcho()
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{
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// TODO Auto-generated destructor stub
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}
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void VideoEcho::Draw(RenderContext &context)
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{
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glEnable(GL_TEXTURE_2D);
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float tex[4][2] = {{0, 1},
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{0, 0},
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{1, 0},
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{1, 1}};
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float points[4][2] = {{-0.5, -0.5},
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{-0.5, 0.5},
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{ 0.5, 0.5},
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{ 0.5, -0.5}};
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glEnableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_COLOR_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glVertexPointer(2,GL_FLOAT,0,points);
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glTexCoordPointer(2,GL_FLOAT,0,tex);
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//Now Blend the Video Echo
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glMatrixMode(GL_TEXTURE);
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//draw video echo
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glColor4f(1.0, 1.0, 1.0, a * masterAlpha);
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glTranslatef(.5, .5, 0);
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glScalef(1.0/zoom, 1.0/zoom, 1);
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glTranslatef(-.5, -.5, 0);
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int flipx=1, flipy=1;
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switch (orientation)
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{
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case Normal: flipx=1;flipy=1;break;
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case FlipX: flipx=-1;flipy=1;break;
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case FlipY: flipx=1;flipy=-1;break;
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case FlipXY: flipx=-1;flipy=-1;break;
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default: flipx=1;flipy=1; break;
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}
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double pointsFlip[4][2] = {{-0.5*flipx, -0.5*flipy},
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{-0.5*flipx, 0.5*flipy},
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{ 0.5*flipx, 0.5*flipy},
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{ 0.5*flipx, -0.5*flipy}};
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glVertexPointer(2,GL_FLOAT,0,pointsFlip);
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glDrawArrays(GL_TRIANGLE_FAN,0,4);
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glDisable(GL_TEXTURE_2D);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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}
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