- create a renderer backend based on softpoly's drawers

src/rendering/polyrenderer/backend/poly_buffers.cpp

@@ -0,0 +1,131 @@
+
+#include "poly_buffers.h"
+#include "poly_framebuffer.h"
+#include "poly_renderstate.h"
+#include "doomerrors.h"
+
+PolyBuffer *PolyBuffer::First = nullptr;
+
+PolyBuffer::PolyBuffer()
+{
+	Next = First;
+	First = this;
+	if (Next) Next->Prev = this;
+}
+
+PolyBuffer::~PolyBuffer()
+{
+	if (Next) Next->Prev = Prev;
+	if (Prev) Prev->Next = Next;
+	else First = Next;
+}
+
+void PolyBuffer::ResetAll()
+{
+	for (PolyBuffer *cur = PolyBuffer::First; cur; cur = cur->Next)
+		cur->Reset();
+}
+
+void PolyBuffer::Reset()
+{
+}
+
+void PolyBuffer::SetData(size_t size, const void *data, bool staticdata)
+{
+	mData.resize(size);
+	map = mData.data();
+	if (data)
+		memcpy(map, data, size);
+	buffersize = size;
+}
+
+void PolyBuffer::SetSubData(size_t offset, size_t size, const void *data)
+{
+	memcpy(static_cast<uint8_t*>(map) + offset, data, size);
+}
+
+void PolyBuffer::Resize(size_t newsize)
+{
+	mData.resize(newsize);
+	buffersize = newsize;
+	map = mData.data();
+}
+
+void PolyBuffer::Map()
+{
+}
+
+void PolyBuffer::Unmap()
+{
+}
+
+void *PolyBuffer::Lock(unsigned int size)
+{
+	return map;
+}
+
+void PolyBuffer::Unlock()
+{
+}
+
+/////////////////////////////////////////////////////////////////////////////
+
+void PolyVertexBuffer::SetFormat(int numBindingPoints, int numAttributes, size_t stride, const FVertexBufferAttribute *attrs)
+{
+	for (int j = 0; j < numAttributes; j++)
+	{
+		mOffsets[attrs[j].location] = attrs[j].offset;
+	}
+	mStride = stride;
+}
+
+void PolyVertexBuffer::CopyVertices(TriVertex *dst, int count, int index)
+{
+	size_t stride = mStride;
+	size_t offsetVertex = mOffsets[VATTR_VERTEX];
+	size_t offsetTexcoord = mOffsets[VATTR_TEXCOORD];
+	uint8_t *vertex = static_cast<uint8_t*>(map) + stride * index;
+
+	for (int i = 0; i < count; i++)
+	{
+		dst[i].x = *reinterpret_cast<float*>(vertex + offsetVertex);
+		dst[i].y = *reinterpret_cast<float*>(vertex + offsetVertex + 4);
+		dst[i].z = *reinterpret_cast<float*>(vertex + offsetVertex + 8);
+		dst[i].w = 1.0f;
+		dst[i].v = *reinterpret_cast<float*>(vertex + offsetTexcoord);
+		dst[i].u = *reinterpret_cast<float*>(vertex + offsetTexcoord + 4);
+		vertex += stride;
+	}
+}
+
+void PolyVertexBuffer::CopyIndexed(TriVertex *dst, uint32_t *elements, int count, int index)
+{
+	size_t stride = mStride;
+	size_t offsetVertex = mOffsets[VATTR_VERTEX];
+	size_t offsetTexcoord = mOffsets[VATTR_TEXCOORD];
+	uint8_t *vertices = static_cast<uint8_t*>(map);
+
+	elements += index;
+	for (int i = 0; i < count; i++)
+	{
+		uint8_t *vertex = vertices + stride * elements[i];
+		dst[i].x = *reinterpret_cast<float*>(vertex + offsetVertex);
+		dst[i].y = *reinterpret_cast<float*>(vertex + offsetVertex + 4);
+		dst[i].z = *reinterpret_cast<float*>(vertex + offsetVertex + 8);
+		dst[i].w = 1.0f;
+		dst[i].v = *reinterpret_cast<float*>(vertex + offsetTexcoord);
+		dst[i].u = *reinterpret_cast<float*>(vertex + offsetTexcoord + 4);
+	}
+}
+
+/////////////////////////////////////////////////////////////////////////////
+
+void PolyDataBuffer::BindRange(size_t start, size_t length)
+{
+	GetPolyFrameBuffer()->GetRenderState()->Bind(this, (uint32_t)start, (uint32_t)length);
+}
+
+void PolyDataBuffer::BindBase()
+{
+	GetPolyFrameBuffer()->GetRenderState()->Bind(this, 0, (uint32_t)buffersize);
+}