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- store the stencil caps in the reserved part of the main vertex buffer instead of constantly recreating them.

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This commit is contained in:
Christoph Oelckers 2016-08-26 00:01:51 +02:00
parent 76d7b52fcd
commit b83c2056a8
3 changed files with 24 additions and 24 deletions
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13
src/gl/data/gl_vertexbuffer.cpp
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@ -153,7 +153,7 @@ FFlatVertexBuffer::FFlatVertexBuffer(int width, int height)
map = new FFlatVertex[BUFFER_SIZE];
}
mIndex = mCurIndex = 0;
mNumReserved = 12;
mNumReserved = NUM_RESERVED;
vbo_shadowdata.Resize(mNumReserved);
// the first quad is reserved for handling coordinates through uniforms.
@ -174,6 +174,17 @@ FFlatVertexBuffer::FFlatVertexBuffer(int width, int height)
vbo_shadowdata[10].Set(1.0f, -1.0f, 0, 1.f, 0.0f);
vbo_shadowdata[11].Set(1.0f, 1.0f, 0, 1.f, 1.f);
// The next two are the stencil caps.
vbo_shadowdata[12].Set(-32767.0f, 32767.0f, -32767.0f, 0, 0);
vbo_shadowdata[13].Set(-32767.0f, 32767.0f, 32767.0f, 0, 0);
vbo_shadowdata[14].Set(32767.0f, 32767.0f, 32767.0f, 0, 0);
vbo_shadowdata[15].Set(32767.0f, 32767.0f, -32767.0f, 0, 0);
vbo_shadowdata[16].Set(-32767.0f, -32767.0f, -32767.0f, 0, 0);
vbo_shadowdata[17].Set(-32767.0f, -32767.0f, 32767.0f, 0, 0);
vbo_shadowdata[18].Set(32767.0f, -32767.0f, 32767.0f, 0, 0);
vbo_shadowdata[19].Set(32767.0f, -32767.0f, -32767.0f, 0, 0);
}
FFlatVertexBuffer::~FFlatVertexBuffer()

6
src/gl/data/gl_vertexbuffer.h
View file

@ -87,7 +87,11 @@ public:
{
QUAD_INDEX = 0,
FULLSCREEN_INDEX = 4,
PRESENT_INDEX = 8
PRESENT_INDEX = 8,
STENCILTOP_INDEX = 12,
STENCILBOTTOM_INDEX = 16,
NUM_RESERVED = 20
};
TArray<FFlatVertex> vbo_shadowdata; // this is kept around for updating the actual (non-readable) buffer and as stand-in for pre GL 4.x

27
src/gl/scene/gl_portal.cpp
View file

@ -147,8 +147,7 @@ void GLPortal::DrawPortalStencil()
{
if (mPrimIndices.Size() == 0)
{
bool cap = NeedCap() && lines.Size() > 1;
mPrimIndices.Resize(2 * lines.Size() + 4 * cap);
mPrimIndices.Resize(2 * lines.Size());
for (unsigned int i = 0; i < lines.Size(); i++)
{
@ -156,31 +155,17 @@ void GLPortal::DrawPortalStencil()
mPrimIndices[i * 2] = lines[i].vertindex;
mPrimIndices[i * 2 + 1] = lines[i].vertcount;
}
if (cap)
{
// Cap the stencil at the top and bottom
int n = lines.Size() * 2;
FFlatVertex *ptr = GLRenderer->mVBO->GetBuffer();
ptr[0].Set(-32767.0f, 32767.0f, -32767.0f, 0, 0);
ptr[1].Set(-32767.0f, 32767.0f, 32767.0f, 0, 0);
ptr[2].Set(32767.0f, 32767.0f, 32767.0f, 0, 0);
ptr[3].Set(32767.0f, 32767.0f, -32767.0f, 0, 0);
ptr += 4;
mPrimIndices[n + 1] = GLRenderer->mVBO->GetCount(ptr, &mPrimIndices[n]);
ptr[0].Set(-32767.0f, -32767.0f, -32767.0f, 0, 0);
ptr[1].Set(-32767.0f, -32767.0f, 32767.0f, 0, 0);
ptr[2].Set(32767.0f, -32767.0f, 32767.0f, 0, 0);
ptr[3].Set(32767.0f, -32767.0f, -32767.0f, 0, 0);
ptr += 4;
mPrimIndices[n + 3] = GLRenderer->mVBO->GetCount(ptr, &mPrimIndices[n + 2]);
}
}
gl_RenderState.Apply();
for (unsigned int i = 0; i < mPrimIndices.Size(); i += 2)
{
GLRenderer->mVBO->RenderArray(GL_TRIANGLE_FAN, mPrimIndices[i], mPrimIndices[i + 1]);
}
if (NeedCap() && lines.Size() > 1)
{
glDrawArrays(GL_TRIANGLE_FAN, FFlatVertexBuffer::STENCILTOP_INDEX, 4);
glDrawArrays(GL_TRIANGLE_FAN, FFlatVertexBuffer::STENCILBOTTOM_INDEX, 4);
}
}