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This commit is contained in:
Pavel Krajcevski 2016-02-08 14:22:35 -05:00
parent 599152575b
commit 13d8407163
3 changed files with 14 additions and 10 deletions
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10
BPTCEncoder/include/FasTC/BPTCCompressor.h
View file

@ -127,11 +127,11 @@ namespace BPTCC {
// between zero and sixty-four that corresponds to one of the available
// partitioning schemes defined by the BPTC format.
struct ShapeSelection {
// This is the number of indices from which to select the appropriate
// shapes. I.e. the compressor will try the first m_NumIndices shapes
uint32 m_NumIndices;
// This is the number of valid shapes in m_Shapes
uint32 m_NumShapesToSearch;
// These are the shape indices to use when evaluating two-partition shapes.
// These are the shape indices to use when evaluating shapes.
// I.e. the shapes that the compressor will try to optimize.
Shape m_Shapes[10];
// This is the additional mask to prevent modes once shape selection
@ -141,7 +141,7 @@ namespace BPTCC {
// Defaults
ShapeSelection()
: m_NumIndices(0)
: m_NumShapesToSearch(0)
, m_SelectedModes(static_cast<EBlockMode>(0xFF))
{ }
};

10
BPTCEncoder/src/Compressor.cpp
View file

@ -1722,7 +1722,7 @@ static ShapeSelection BoxSelection(
RGBACluster cluster(pixels);
result.m_NumIndices = 1;
result.m_NumShapesToSearch = 1;
for(unsigned int i = 0; i < kNumShapes2; i++) {
cluster.SetShapeIndex(i, 2);
@ -1758,7 +1758,7 @@ static ShapeSelection BoxSelection(
~(static_cast<uint32>(eBlockMode_Four) |
static_cast<uint32>(eBlockMode_Five));
result.m_NumIndices++;
result.m_NumShapesToSearch++;
for(unsigned int i = 0; i < kNumShapes3; i++) {
cluster.SetShapeIndex(i, 3);
@ -1794,7 +1794,7 @@ static void CompressClusters(const ShapeSelection &selection, const uint32 pixel
CompressionMode::Params bestParams;
uint32 selectedModes = selection.m_SelectedModes;
uint32 numShapeIndices = std::min<uint32>(5, selection.m_NumIndices);
uint32 numShapeIndices = std::min<uint32>(5, selection.m_NumShapesToSearch);
// If we don't have any indices, turn off two and three partition modes,
// since the compressor will simply ignore the shapeIndex variable afterwards...
@ -2102,7 +2102,7 @@ static void CompressBC7Block(
ShapeSelection selection;
uint32 path = 0;
selection.m_NumIndices = 1;
selection.m_NumShapesToSearch = 1;
for(unsigned int i = 0; i < kNumShapes2; i++) {
blockCluster.SetShapeIndex(i, 2);
@ -2156,7 +2156,7 @@ static void CompressBC7Block(
// There are not 3 subset blocks that support alpha, so only check these
// if the entire block is opaque.
if(opaque) {
selection.m_NumIndices++;
selection.m_NumShapesToSearch++;
for(unsigned int i = 0; i < kNumShapes3; i++) {
blockCluster.SetShapeIndex(i, 3);

4
DXTEncoder/src/Decompressor.cpp
View file

@ -61,6 +61,10 @@
namespace DXTC
{
void DecompressDXT1Block(const uint8 *block, uint32 *outBuf) {
// When we call FasTC::Pixel::FromBits, we expect the bits
// to be read out of memory in LSB (byte) order first. Hence,
// we can't read the blocks directly as uint16 values out of
// the DXT buffer and we have to swap the bytes before hand.
uint16 colorA = block[0];
colorA <<= 8;
colorA |= block[1];