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https://github.com/overte-org/overte.git
synced 2025-08-04 20:06:48 +02:00
Basic frame grab from camera; not currently working yet, but let's try on
OS X!
This commit is contained in:
parent
0d4efad490
commit
c7ddc89803
3 changed files with 63 additions and 1 deletions
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@ -1567,6 +1567,9 @@ void Application::update(float deltaTime) {
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// Update transmitter
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// Get the webcam frame
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_webcam.grabFrame();
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// Sample hardware, update view frustum if needed, and send avatar data to mixer/agents
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updateAvatar(deltaTime);
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@ -2148,6 +2151,27 @@ void Application::displayOverlay() {
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drawtext(_glWidget->width() - 350, 50, 0.10, 0, 1.0, 0, paintMessage, 1, 1, 0);
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}
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// render the webcam input frame
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, _webcam.getFrameTextureID());
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glBegin(GL_QUADS);
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const int FRAME_PREVIEW_HEIGHT = 200;
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int framePreviewWidth = _webcam.getFrameAspectRatio() * FRAME_PREVIEW_HEIGHT;
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int bottom = _glWidget->height() - 400;
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int left = _glWidget->width() - framePreviewWidth - 400;
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glTexCoord2f(0, 0);
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glVertex2f(left, bottom);
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glTexCoord2f(1, 0);
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glVertex2f(left + framePreviewWidth, bottom);
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glTexCoord2f(1, 1);
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glVertex2f(left + framePreviewWidth, bottom + FRAME_PREVIEW_HEIGHT);
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glTexCoord2f(0, 1);
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glVertex2f(left, bottom + FRAME_PREVIEW_HEIGHT);
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glEnd();
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glBindTexture(GL_TEXTURE_2D, 0);
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glDisable(GL_TEXTURE_2D);
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glPopMatrix();
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}
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@ -14,7 +14,22 @@
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Webcam::Webcam() {
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if ((_capture = cvCaptureFromCAM(-1)) == 0) {
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printLog("Failed to open webcam.\n");
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return;
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}
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// bump up the capture property
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cvSetCaptureProperty(_capture, CV_CAP_PROP_FPS, 60);
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// get the dimensions of the frames
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_frameWidth = cvGetCaptureProperty(_capture, CV_CAP_PROP_FRAME_WIDTH);
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_frameHeight = cvGetCaptureProperty(_capture, CV_CAP_PROP_FRAME_HEIGHT);
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// initialize the texture that will contain the grabbed frames
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glGenTextures(1, &_frameTextureID);
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glBindTexture(GL_TEXTURE_2D, _frameTextureID);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, _frameWidth, _frameHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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Webcam::~Webcam() {
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@ -22,3 +37,13 @@ Webcam::~Webcam() {
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cvReleaseCapture(&_capture);
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}
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}
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void Webcam::grabFrame() {
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IplImage* image = cvQueryFrame(_capture);
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if (image == 0) {
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return;
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}
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glBindTexture(GL_TEXTURE_2D, _frameTextureID);
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glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, _frameWidth, _frameHeight, GL_RGB, GL_UNSIGNED_BYTE, image->imageData);
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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@ -9,7 +9,9 @@
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#ifndef __interface__Webcam__
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#define __interface__Webcam__
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class CvCapture;
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#include "InterfaceConfig.h"
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struct CvCapture;
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class Webcam {
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public:
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@ -17,9 +19,20 @@ public:
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Webcam();
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~Webcam();
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int getFrameWidth() const { return _frameWidth; }
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int getFrameHeight() const { return _frameHeight; }
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float getFrameAspectRatio() const { return _frameWidth / (float)_frameHeight; }
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GLuint getFrameTextureID() const { return _frameTextureID; }
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void grabFrame();
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private:
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CvCapture* _capture;
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int _frameWidth;
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int _frameHeight;
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GLuint _frameTextureID;
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};
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#endif /* defined(__interface__Webcam__) */
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