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Fix issues with empty VBO upload and vbo size desync

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fgenesis 2025-03-12 02:42:41 +01:00
parent e89dd41be6
commit 5f9d26c360
2 changed files with 16 additions and 9 deletions
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11
Aquaria/CurrentRender.cpp
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@ -70,7 +70,11 @@ void CurrentRender::onUpdate(float dt)
size_t usedsize;
do
{
float *p = (float*)vbo.beginWrite(GPUBUFTYPE_VEC2_TC_RGBA, bytes, GPUACCESS_DEFAULT);
// Usually we write much less data than maximally possible to the GPU,
// because most segments are off-screen and not visible.
// The hostcopy flag accumulates the used data in the host heap
// and only uploads what is necessary in the end
float *p = (float*)vbo.beginWrite(GPUBUFTYPE_VEC2_TC_RGBA, bytes, GPUACCESS_HOSTCOPY);
verts = writeVBOData(p);
usedsize = verts * 8 * sizeof(float);
}
@ -109,9 +113,6 @@ size_t CurrentRender::writeVBOData(float *p)
if (diff.isZero())
continue;
float len = diff.getLength2D();
float texScale = len/256.0f;
if (isTouchingLine(p1, p2, dsq->screenCenter, dsq->cullRadius+w2))
{
Vector pl = diff.getPerpendicularLeft();
@ -132,6 +133,8 @@ size_t CurrentRender::writeVBOData(float *p)
const float ao = P->animOffset;
const float a = P->amount;
const float len = diff.getLength2D();
const float texScale = len/256.0f;
/* This builds a structure like this:
a = 0 alpha

14
BBGE/VertexBuffer.cpp
View file

@ -141,12 +141,15 @@ bool DynamicGPUBuffer::_commitWrite(size_t used)
// -> didn't map, but wrote to host memory. upload it.
assert(_h_data);
assert(used <= _h_cap);
if(used <= _d_cap)
glBufferSubDataARB(_gl_binding, 0, used, _h_data); // update existing buffer
else
if(used)
{
_d_cap = used;
glBufferDataARB(_gl_binding, used, _h_data, _gl_usage); // alloc new buffer
if(used <= _d_cap)
glBufferSubDataARB(_gl_binding, 0, used, _h_data); // update existing buffer
else
{
_d_cap = used;
glBufferDataARB(_gl_binding, used, _h_data, _gl_usage); // alloc new buffer
}
}
}
// else nothing to do
@ -168,6 +171,7 @@ void DynamicGPUBuffer::upload(BufDataType type, const void* data, size_t size)
last = id;
glBindBufferARB(_gl_binding, id);
}
_d_cap = size;
glBufferDataARB(_gl_binding, size, data, _gl_usage);
}
else