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rebind instance data buffer if index buffer changes

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Fix case of drawing different indices of same vertex buffer using same
instance data.

This can happen in the case of conditionally drawing subsets of vertex
buffer stored in different index buffers while re-using non-transient
instance buffers.
This commit is contained in:
Sandy Carter
2019-10-25 14:56:54 +02:00
committed by Бранимир Караџић
parent bb07e99907
commit a38e873f8a
1 changed files with 7 additions and 0 deletions
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7
src/renderer_gl.cpp
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@@ -7195,6 +7195,8 @@ namespace bgfx { namespace gl
{
bool diffStreamHandles = false;
bool diffIndexBuffer = false;
for (uint32_t idx = 0, streamMask = draw.m_streamMask
; 0 != streamMask
; streamMask >>= 1, idx += 1
@@ -7252,6 +7254,8 @@ namespace bgfx { namespace gl
{
GL_CHECK(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0) );
}
diffIndexBuffer = true;
}
if (0 != currentState.m_streamMask)
@@ -7308,7 +7312,10 @@ namespace bgfx { namespace gl
}
program.bindAttributesEnd();
}
if (bindAttribs || diffStartVertex || diffIndexBuffer)
{
if (isValid(draw.m_instanceDataBuffer) )
{
GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffers[draw.m_instanceDataBuffer.idx].m_id) );