//----------------------------------------------------------
void ofGLRenderer::setupScreenPerspective(float width, float height, ofOrientation orientation, bool vFlip, float fov, float nearDist, float farDist) {
if(width == 0) width = ofGetWidth();
if(height == 0) height = ofGetHeight();
float viewW = ofGetViewportWidth();
float viewH = ofGetViewportHeight();
float eyeX = viewW / 2;
float eyeY = viewH / 2;
float halfFov = PI * fov / 360;
float theTan = tanf(halfFov);
float dist = eyeY / theTan;
float aspect = (float) viewW / viewH;
if(nearDist == 0) nearDist = dist / 10.0f;
if(farDist == 0) farDist = dist * 10.0f;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
ofMatrix4x4 persp;
persp.makePerspectiveMatrix(fov, aspect, nearDist, farDist);
loadMatrix( persp );
//gluPerspective(fov, aspect, nearDist, farDist);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
ofMatrix4x4 lookAt;
lookAt.makeLookAtViewMatrix( ofVec3f(eyeX, eyeY, dist), ofVec3f(eyeX, eyeY, 0), ofVec3f(0, 1, 0) );
loadMatrix( lookAt );
//gluLookAt(eyeX, eyeY, dist, eyeX, eyeY, 0, 0, 1, 0);
//note - theo checked this on iPhone and Desktop for both vFlip = false and true
if(ofDoesHWOrientation()){
if(vFlip){
glScalef(1, -1, 1);
glTranslatef(0, -height, 0);
}
}else{
if( orientation == OF_ORIENTATION_UNKNOWN ) orientation = ofGetOrientation();
switch(orientation) {
case OF_ORIENTATION_180:
glRotatef(-180, 0, 0, 1);
if(vFlip){
glScalef(1, -1, 1);
glTranslatef(-width, 0, 0);
}else{
glTranslatef(-width, -height, 0);
}
break;
case OF_ORIENTATION_90_RIGHT:
glRotatef(-90, 0, 0, 1);
if(vFlip){
glScalef(-1, 1, 1);
}else{
glScalef(-1, -1, 1);
glTranslatef(0, -height, 0);
}
break;
case OF_ORIENTATION_90_LEFT:
glRotatef(90, 0, 0, 1);
if(vFlip){
glScalef(-1, 1, 1);
glTranslatef(-width, -height, 0);
}else{
glScalef(-1, -1, 1);
glTranslatef(-width, 0, 0);
}
break;
case OF_ORIENTATION_DEFAULT:
default:
if(vFlip){
glScalef(1, -1, 1);
glTranslatef(0, -height, 0);
}
break;
}
}
}
//----------------------------------------------------------
void ofGLRenderer::setupScreenOrtho(float width, float height, ofOrientation orientation, bool vFlip, float nearDist, float farDist) {
if(width == 0) width = ofGetWidth();
if(height == 0) height = ofGetHeight();
float viewW = ofGetViewportWidth();
float viewH = ofGetViewportHeight();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
ofSetCoordHandedness(OF_RIGHT_HANDED);
if(vFlip) {
ofMatrix4x4 ortho = ofMatrix4x4::newOrthoMatrix(0, width, height, 0, nearDist, farDist);
ofSetCoordHandedness(OF_LEFT_HANDED);
}
ofMatrix4x4 ortho = ofMatrix4x4::newOrthoMatrix(0, viewW, 0, viewH, nearDist, farDist);
glMultMatrixf(ortho.getPtr());
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//note - theo checked this on iPhone and Desktop for both vFlip = false and true
if(ofDoesHWOrientation()){
if(vFlip){
glScalef(1, -1, 1);
glTranslatef(0, -height, 0);
}
}else{
if( orientation == OF_ORIENTATION_UNKNOWN ) orientation = ofGetOrientation();
switch(orientation) {
case OF_ORIENTATION_180:
glRotatef(-180, 0, 0, 1);
if(vFlip){
glScalef(1, -1, 1);
glTranslatef(-width, 0, 0);
}else{
glTranslatef(-width, -height, 0);
}
break;
case OF_ORIENTATION_90_RIGHT:
glRotatef(-90, 0, 0, 1);
if(vFlip){
glScalef(-1, 1, 1);
}else{
glScalef(-1, -1, 1);
glTranslatef(0, -height, 0);
}
break;
case OF_ORIENTATION_90_LEFT:
glRotatef(90, 0, 0, 1);
if(vFlip){
glScalef(-1, 1, 1);
glTranslatef(-width, -height, 0);
}else{
glScalef(-1, -1, 1);
glTranslatef(-width, 0, 0);
}
break;
case OF_ORIENTATION_DEFAULT:
default:
if(vFlip){
glScalef(1, -1, 1);
glTranslatef(0, -height, 0);
}
break;
}
}
}
void ofImage_<PixelType>::grabScreen(int _x, int _y, int _w, int _h){
allocate(_w, _h, OF_IMAGE_COLOR);
int sh = ofGetViewportHeight(); // if we are in a FBO or other viewport, this fails: ofGetHeight();
#ifndef TARGET_OPENGLES
if(ofIsVFlipped()){
_y = sh - _y;
_y -= _h; // top, bottom issues
}
glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT ); // be nice to anyone else who might use pixelStore
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(_x, _y, _w, _h, ofGetGlFormat(pixels), GL_UNSIGNED_BYTE, pixels.getPixels()); // read the memory....
glPopClientAttrib();
int sizeOfOneLineOfPixels = pixels.getWidth() * pixels.getBytesPerPixel();
PixelType * tempLineOfPix = new PixelType[sizeOfOneLineOfPixels];
PixelType * linea;
PixelType * lineb;
for (int i = 0; i < pixels.getHeight()/2; i++){
linea = pixels.getPixels() + i * sizeOfOneLineOfPixels;
lineb = pixels.getPixels() + (pixels.getHeight()-i-1) * sizeOfOneLineOfPixels;
memcpy(tempLineOfPix, linea, sizeOfOneLineOfPixels);
memcpy(linea, lineb, sizeOfOneLineOfPixels);
memcpy(lineb, tempLineOfPix, sizeOfOneLineOfPixels);
}
delete [] tempLineOfPix;
#else
int sw = ofGetViewportWidth();
int numPixels = width*height;
if( numPixels == 0 ){
ofLogError("ofImage") << "grabScreen(): unable to grab screen, image width and/or height are 0: " << width << "x" << height;
return;
}
int numRGBA = numPixels*4;
GLubyte *bufferRGBA = (GLubyte *) malloc(numRGBA);
if(ofGetOrientation() == OF_ORIENTATION_DEFAULT || ofDoesHWOrientation()) {
if(ofIsVFlipped()){
_y = sh - _y; // screen is flipped vertically.
_y -= _h;
}
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(_x, _y, _w, _h, GL_RGBA, GL_UNSIGNED_BYTE, bufferRGBA);
for(int y = 0; y < _h; y++){
for(int x = 0; x < _w; x++){
int i = y * _w * 3 + x * 3;
int j = (_h-1-y) * _w * 4 + x * 4; // rotate 90.
pixels.getPixels()[i] = bufferRGBA[j];
pixels.getPixels()[i+1] = bufferRGBA[j+1];
pixels.getPixels()[i+2] = bufferRGBA[j+2];
}
}
}
else if(ofGetOrientation() == OF_ORIENTATION_180) {
if(ofIsVFlipped()){
_x = sw - _x; // screen is flipped horizontally.
_x -= _w;
}
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(_x, _y, _w, _h, GL_RGBA, GL_UNSIGNED_BYTE, bufferRGBA);
for(int y = 0; y < _h; y++){
for(int x = 0; x < _w; x++){
int i = y * _w * 3 + x * 3;
int j = y * _w * 4 + (_w-1-x) * 4; // rotate 90.
pixels.getPixels()[i] = bufferRGBA[j];
pixels.getPixels()[i+1] = bufferRGBA[j+1];
pixels.getPixels()[i+2] = bufferRGBA[j+2];
}
}
}
else if(ofGetOrientation() == OF_ORIENTATION_90_RIGHT) {
swap(_w,_h);
swap(_x,_y);
if(!ofIsVFlipped()){
_x = sw - _x; // screen is flipped horizontally.
_x -= _w;
_y = sh - _y; // screen is flipped vertically.
_y -= _h;
}
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(_x, _y, _w, _h, GL_RGBA, GL_UNSIGNED_BYTE, bufferRGBA);
for(int y = 0; y < _h; y++){
for(int x = 0; x < _w; x++){
int i = x * _h * 3 + y * 3;
int j = y * _w * 4 + x * 4;
pixels.getPixels()[i] = bufferRGBA[j];
pixels.getPixels()[i+1] = bufferRGBA[j+1];
pixels.getPixels()[i+2] = bufferRGBA[j+2];
}
}
}
else if(ofGetOrientation() == OF_ORIENTATION_90_LEFT) {
swap(_w, _h);
swap(_x, _y);
if(ofIsVFlipped()){
_x = sw - _x; // screen is flipped horizontally.
_x -= _w;
_y = sh - _y; // screen is flipped vertically.
_y -= _h;
}
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(_x, _y, _w, _h, GL_RGBA, GL_UNSIGNED_BYTE, bufferRGBA);
for(int y = 0; y < _h; y++){
for(int x = 0; x < _w; x++){
int i = x * _h * 3 + y * 3;
int j = (_h-1-y) * _w * 4 + (_w-1-x) * 4;
pixels.getPixels()[i] = bufferRGBA[j];
pixels.getPixels()[i+1] = bufferRGBA[j+1];
pixels.getPixels()[i+2] = bufferRGBA[j+2];
}
}
}
free(bufferRGBA);
#endif
update();
}
