bool ImageConverter::prepareData()
{
DPTR_D(ImageConverter);
if (d.fmt_out == QTAV_PIX_FMT_C(NONE) || d.w_out <=0 || d.h_out <= 0)
return false;
AV_ENSURE(av_image_check_size(d.w_out, d.h_out, 0, NULL), false);
const int nb_planes = qMax(av_pix_fmt_count_planes(d.fmt_out), 0);
d.bits.resize(nb_planes);
d.pitchs.resize(nb_planes);
// alignment is 16. sws in ffmpeg is 16, libav10 is 8
const int kAlign = 16;
AV_ENSURE(av_image_fill_linesizes((int*)d.pitchs.constData(), d.fmt_out, kAlign > 7 ? FFALIGN(d.w_out, 8) : d.w_out), false);
for (int i = 0; i < d.pitchs.size(); ++i)
d.pitchs[i] = FFALIGN(d.pitchs[i], kAlign);
int s = av_image_fill_pointers((uint8_t**)d.bits.constData(), d.fmt_out, d.h_out, NULL, d.pitchs.constData());
if (s < 0)
return false;
d.data_out.resize(s + kAlign-1);
const int offset = (kAlign - ((uintptr_t)d.data_out.constData() & (kAlign-1))) & (kAlign-1);
AV_ENSURE(av_image_fill_pointers((uint8_t**)d.bits.constData(), d.fmt_out, d.h_out, (uint8_t*)d.data_out.constData()+offset, d.pitchs.constData()), false);
// TODO: special formats
//if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
// avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
for (int i = 0; i < d.pitchs.size(); ++i) {
Q_ASSERT(d.pitchs[i]%kAlign == 0);
Q_ASSERT(qptrdiff(d.bits[i])%kAlign == 0);
}
return true;
}
void GeometryRenderer::updateGeometry(Geometry *geo)
{
g = geo;
if (!g) {
ibo.destroy();
vbo.destroy();
#if QT_VAO
vao.destroy();
#endif
vbo_size = 0;
ibo_size = 0;
return;
}
static int support_map = -1;
if (support_map < 0) {
static const char* ext[] = { "GL_OES_mapbuffer", NULL};
if (OpenGLHelper::isOpenGLES()) {
support_map = QOpenGLContext::currentContext()->format().majorVersion() > 2 ||
OpenGLHelper::hasExtension(ext);
} else {
support_map = 1;
}
}
if (testFeatures(kIBO) && !ibo.isCreated()) {
if (g->indexCount() > 0) {
qDebug("creating IBO...");
if (!ibo.create())
qDebug("IBO create error");
}
}
if (ibo.isCreated()) {
ibo.bind();
const int bs = g->indexDataSize();
if (bs == ibo_size) {
void * p = NULL;
if (support_map && testFeatures(kMapBuffer))
p = ibo.map(QOpenGLBuffer::WriteOnly);
if (p) {
memcpy(p, g->constIndexData(), bs);
ibo.unmap();
} else {
ibo.write(0, g->constIndexData(), bs);
}
} else {
ibo.allocate(g->indexData(), bs); // TODO: allocate NULL and then map or BufferSubData?
ibo_size = bs;
}
ibo.release();
}
if (testFeatures(kVBO) && !vbo.isCreated()) {
qDebug("creating VBO...");
if (!vbo.create())
qWarning("VBO create error");
}
if (vbo.isCreated()) {
vbo.bind();
const int bs = g->vertexCount()*g->stride();
/* Notes from https://www.opengl.org/sdk/docs/man/html/glBufferSubData.xhtml
When replacing the entire data store, consider using glBufferSubData rather than completely recreating the data store with glBufferData. This avoids the cost of reallocating the data store.
*/
if (bs == vbo_size) { // vbo.size() error 0x501 on rpi, and query gl value can be slow
void* p = NULL;
if (support_map && testFeatures(kMapBuffer))
p = vbo.map(QOpenGLBuffer::WriteOnly);
if (p) {
memcpy(p, g->constVertexData(), bs);
vbo.unmap();
} else {
vbo.write(0, g->constVertexData(), bs);
vbo_size = bs;
}
} else {
vbo.allocate(g->vertexData(), bs);
}
vbo.release();
}
#if QT_VAO
if (stride == g->stride() && attrib == g->attributes())
return;
stride = g->stride();
attrib = g->attributes();
if (testFeatures(kVAO) && !vao.isCreated()) {
qDebug("creating VAO...");
if (!vao.create())
qDebug("VAO create error");
}
qDebug("vao updated");
if (vao.isCreated()) // can not use vao binder because it will create a vao if necessary
vao.bind();
// can set data before vao bind
if (!vao.isCreated())
return;
qDebug("geometry attributes changed, rebind vao...");
// call once is enough if no feature and no geometry attribute is changed
if (vbo.isCreated()) {
vbo.bind();
for (int an = 0; an < g->attributes().size(); ++an) {
// FIXME: assume bind order is 0,1,2...
const Attribute& a = g->attributes().at(an);
QGLF(glVertexAttribPointer(an, a.tupleSize(), a.type(), a.normalize(), g->stride(), reinterpret_cast<const void *>(qptrdiff(a.offset())))); //TODO: in setActiveShader
QGLF(glEnableVertexAttribArray(an));
}
vbo.release(); // unbind after vao unbind? http://www.zwqxin.com/archives/opengl/vao-and-vbo-stuff.html
} // TODO: bind pointers if vbo is disabled
// bind ibo to vao thus no bind is required later
if (ibo.isCreated())// if not bind here, glDrawElements(...,NULL) crashes and must use ibo data ptr, why?
ibo.bind();
vao.release();
if (ibo.isCreated())
ibo.release();
#endif
qDebug("geometry updated");
}
