void ofBufferObject::copyTo(ofBufferObject & dstBuffer) const{
bind(GL_COPY_READ_BUFFER);
dstBuffer.bind(GL_COPY_WRITE_BUFFER);
glCopyBufferSubData(GL_COPY_READ_BUFFER,GL_COPY_WRITE_BUFFER,0,0,size());
unbind(GL_COPY_READ_BUFFER);
dstBuffer.unbind(GL_COPY_WRITE_BUFFER);
}
//----------------------------------------------------------
void ofTexture::allocateAsBufferTexture(const ofBufferObject & buffer, int glInternalFormat){
texData.glInternalFormat = glInternalFormat;
texData.textureTarget = GL_TEXTURE_BUFFER;
texData.bufferId = buffer.getId();
allocate(texData,0,0);
buffer.bind(GL_TEXTURE_BUFFER);
}
void ofBufferObject::copyTo(ofBufferObject & dstBuffer, int readOffset, int writeOffset, size_t size) const{
bind(GL_COPY_READ_BUFFER);
dstBuffer.bind(GL_COPY_WRITE_BUFFER);
glCopyBufferSubData(GL_COPY_READ_BUFFER,GL_COPY_WRITE_BUFFER,readOffset,writeOffset,size);
unbind(GL_COPY_READ_BUFFER);
dstBuffer.unbind(GL_COPY_WRITE_BUFFER);
}
//----------------------------------------------------------
void ofFbo::copyTo(ofBufferObject & buffer) const{
if(!bIsAllocated) return;
bind();
buffer.bind(GL_PIXEL_PACK_BUFFER);
glReadPixels(0, 0, settings.width, settings.height, ofGetGLFormatFromInternal(settings.internalformat), ofGetGlTypeFromInternal(settings.internalformat), NULL);
buffer.unbind(GL_PIXEL_PACK_BUFFER);
unbind();
}
//----------------------------------------------------------
void ofTexture::copyTo(ofBufferObject & buffer) const{
ofSetPixelStoreiAlignment(GL_PACK_ALIGNMENT,getWidth(),ofGetBytesPerChannelFromGLType(ofGetGlTypeFromInternal(texData.glInternalFormat)),ofGetNumChannelsFromGLFormat(ofGetGLFormatFromInternal(texData.glInternalFormat)));
buffer.bind(GL_PIXEL_PACK_BUFFER);
glBindTexture(texData.textureTarget,texData.textureID);
glGetTexImage(texData.textureTarget,0,ofGetGLFormatFromInternal(texData.glInternalFormat),ofGetGlTypeFromInternal(texData.glInternalFormat),0);
glBindTexture(texData.textureTarget,0);
buffer.unbind(GL_PIXEL_PACK_BUFFER);
}
void ofBufferObject::copyTo(ofBufferObject & dstBuffer, int readOffset, int writeOffset, size_t size) const{
#ifdef GLEW_VERSION_4_5
if (GLEW_EXT_direct_state_access) {
glCopyNamedBufferSubData(data->id,dstBuffer.getId(),readOffset,writeOffset,size);
return;
}
#endif
bind(GL_COPY_READ_BUFFER);
dstBuffer.bind(GL_COPY_WRITE_BUFFER);
glCopyBufferSubData(GL_COPY_READ_BUFFER,GL_COPY_WRITE_BUFFER,readOffset,writeOffset,size);
unbind(GL_COPY_READ_BUFFER);
dstBuffer.unbind(GL_COPY_WRITE_BUFFER);
}
void TransitionParticles::update(const ofBufferObject & blobs, const ofxTexture3d & noiseField, float now){
auto numParticles = totalVertices / every;
computeShader.begin();
computeShader.setUniform1f("every", every);
computeShader.setUniform1f("now", now);
computeShader.setUniform1f("dt",ofGetLastFrameTime()*speed);
computeShader.setUniform1f("repulsionForce", repulsion);
computeShader.setUniform1f("attractionForce", attraction);
computeShader.setUniform1f("elapsedTime",now);
computeShader.setUniform1f("bufferSize", totalVertices);
computeShader.setUniform1f("noiseSize", noiseField.texData.width);
computeShader.setUniform1f("frameNum", ofGetFrameNum());
computeShader.setUniformTexture("noiseField", GL_TEXTURE_3D, noiseField.texData.textureID, 0);
computeShader.dispatchCompute(numParticles / 1024 + 1, 1, 1);
computeShader.end();
glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, numVerticesQuery);
shader.beginTransformFeedback(GL_TRIANGLES, feedbackBuffer);
blobs.bindBase(GL_SHADER_STORAGE_BUFFER, 0);
shader.setUniform1f("every", every);
shader.setUniform1f("scale", scale);
shader.setUniform4f("particleColor", color);
model.drawInstanced(GL_TRIANGLES, 0, model.getNumVertices(), numParticles);
shader.endTransformFeedback(feedbackBuffer);
glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN);
glGetQueryObjectuiv(numVerticesQuery, GL_QUERY_RESULT, &numPrimitives);
}
//--------------------------------------------------------------
void ofVbo::setVertexBuffer(ofBufferObject & buffer, int numCoords, int stride, int offset){
positionAttribute.setBuffer(buffer, numCoords, stride, offset);
bUsingVerts = true;
// TODO: Check: we have no perfect way of knowing the new number of total vertices,
// since the buffer does not tell us, so we try to calculate based on the data size
// and the number of coordinates.
totalVerts = buffer.size() / (numCoords * sizeof(float));
}
//--------------------------------------------------------------
void ofVbo::setVertexBuffer(ofBufferObject & buffer, int numCoords, int stride, int offset){
positionAttribute.setBuffer(buffer, numCoords, stride, offset);
bUsingVerts = true;
vaoChanged = true;
// Calculate the total number of vertices based on what we know:
int tmpStride = stride;
if (tmpStride == 0) {
// if stride is not given through argument, we need to calculate it based on
// on the data size and the number of coordinates.
tmpStride = (numCoords * sizeof(float));
if (tmpStride == 0) {
ofLogWarning() << "Setting buffer with 0 vertices.";
totalVerts = 0;
return;
}
}
totalVerts = buffer.size() / tmpStride;
}
//----------------------------------------------------------
void ofTexture::loadData(const ofBufferObject & buffer, int glFormat, int glType){
buffer.bind(GL_PIXEL_UNPACK_BUFFER);
loadData(0,texData.width,texData.height,glFormat,glType);
buffer.unbind(GL_PIXEL_UNPACK_BUFFER);
}