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#include "UnityPrefix.h"
#include "VBO.h"
#include "GraphicsCaps.h"
#include <cstring>
#include "Runtime/Utilities/OptimizationUtility.h"
#include "Runtime/Math/Color.h"
#include "Runtime/GfxDevice/GfxDevice.h"
#if UNITY_XENON
#include <ppcintrinsics.h>
#endif
static const int kChannelVertexSize[kShaderChannelCount] = {
3 * sizeof (float), // position
3 * sizeof (float), // normal
1 * sizeof (UInt32),// color
2 * sizeof (float), // uv0
2 * sizeof (float), // uv1
4 * sizeof (float), // tangent
};
static const UInt8 kDefaultVertexChannelDimensionCount [kShaderChannelCount] = {
3, 3, 1, 2, 2, 4
};
// -----------------------------------------------------------------------------
// VBO common
int VBO::GetDefaultChannelByteSize (int channelNum)
{
DebugAssertIf( channelNum < 0 || channelNum >= kShaderChannelCount );
return kChannelVertexSize[channelNum];
}
int VBO::GetDefaultChannelFormat(int channelNum)
{
DebugAssertIf( channelNum < 0 || channelNum >= kShaderChannelCount );
return (kShaderChannelColor == channelNum) ? kChannelFormatColor : kChannelFormatFloat;
}
int VBO::GetDefaultChannelDimension(int channelNum)
{
return kDefaultVertexChannelDimensionCount [channelNum];
}
bool VBO::IsAnyStreamMapped() const
{
for (int i = 0; i < kMaxVertexStreams; ++i)
if (m_IsStreamMapped[i])
return true;
return false;
}
bool VBO::HasStreamWithMode(StreamMode mode) const
{
for (int i = 0; i < kMaxVertexStreams; ++i)
if (m_StreamModes[i] == mode && m_Streams[i].channelMask)
return true;
return false;
}
size_t GetVertexSize (unsigned shaderChannelsMask)
{
size_t size = 0;
for (int i=0; i<kShaderChannelCount; ++i, shaderChannelsMask >>= 1)
if (shaderChannelsMask & 1)
size += kChannelVertexSize[i];
return size;
}
DynamicVBO::DynamicVBO()
: m_LastChunkShaderChannelMask(0)
, m_LastChunkStride(0)
, m_LastChunkVertices(0)
, m_LastChunkIndices(0)
, m_LastRenderMode(kDrawIndexedTriangles)
, m_LendedChunk(false)
{
}
// ----------------------------------------------------------------------
void CopyVertexStream( const VertexBufferData& sourceData, void* buffer, unsigned stream )
{
DebugAssert(stream < kMaxVertexStreams);
if (!sourceData.buffer)
return;
const StreamInfo& info = sourceData.streams[stream];
const UInt8* src = static_cast<const UInt8*>(sourceData.buffer) + info.offset;
size_t size = CalculateVertexStreamSize(sourceData, stream);
#if UNITY_XENON
XMemCpyStreaming_WriteCombined(buffer, src, size);
#else
memcpy(buffer, src, size);
#endif
}
void CopyVertexBuffer( const VertexBufferData& sourceData, void* buffer )
{
if (sourceData.buffer)
memcpy(buffer, sourceData.buffer, sourceData.bufferSize);
}
void GetVertexStreamOffsets( const VertexBufferData& sourceData, size_t dest[kShaderChannelCount], size_t baseOffset, unsigned stream )
{
for (int i = 0; i < kShaderChannelCount; ++i)
{
const ChannelInfo& channel = sourceData.channels[i];
dest[i] = channel.IsValid() ? baseOffset + channel.CalcOffset(sourceData.streams) : 0;
}
}
void GetVertexStreamPointers( const VertexBufferData& sourceData, void* dest[kShaderChannelCount], void* basePtr, unsigned stream )
{
for (int i = 0; i < kShaderChannelCount; ++i)
{
const ChannelInfo& channel = sourceData.channels[i];
dest[i] = channel.IsValid() ? (UInt8*)basePtr + channel.CalcOffset(sourceData.streams) : NULL;
}
}
void FillIndexBufferForQuads (UInt16* dst, int dstSize, const UInt16* src, int quadCount)
{
int canFitQuads = dstSize / kVBOIndexSize / 6;
quadCount = std::min(quadCount, canFitQuads);
for (int i = 0; i < quadCount; ++i)
{
*dst++ = src[0];
*dst++ = src[1];
*dst++ = src[2];
*dst++ = src[0];
*dst++ = src[2];
*dst++ = src[3];
src += 4;
}
}
// --------------------------------------------------------------------------
#if ENABLE_UNIT_TESTS
#include "External/UnitTest++/src/UnitTest++.h"
SUITE (VBOTests)
{
TEST(FillIndexBufferForQuadsDoesNotOverwritePastEnd)
{
UInt16 srcBuffer[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
UInt16 dstBuffer[] = { 17, 13, 17, 13, 17, 13, 1337 };
FillIndexBufferForQuads (dstBuffer, sizeof(dstBuffer)-2, srcBuffer, 2);
CHECK_EQUAL (1337, dstBuffer[6]);
}
} // SUITE
#endif // ENABLE_UNIT_TESTS
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