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[D3D12] Triangle fans with primitive restart

This commit is contained in:
Triang3l 2018-10-23 08:14:41 +03:00
parent fb12ee72cb
commit f78c48d6f9
1 changed files with 59 additions and 4 deletions
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63
src/xenia/gpu/d3d12/primitive_converter.cc
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@ -257,8 +257,28 @@ PrimitiveConverter::ConversionResult PrimitiveConverter::ConvertPrimitives(
// Triangle fans are not supported by Direct3D 12 at all.
conversion_needed = true;
if (reset) {
// TODO(Triang3l): Triangle fans with primitive reset.
return ConversionResult::kFailed;
uint32_t current_fan_index_count = 0;
if (index_format == IndexFormat::kInt32) {
for (uint32_t i = 0; i < index_count; ++i) {
if (source_32[i] == reset_index) {
current_fan_index_count = 0;
continue;
}
if (++current_fan_index_count >= 3) {
converted_index_count += 3;
}
}
} else {
for (uint32_t i = 0; i < index_count; ++i) {
if (source_16[i] == reset_index) {
current_fan_index_count = 0;
continue;
}
if (++current_fan_index_count >= 3) {
converted_index_count += 3;
}
}
}
} else {
converted_index_count = 3 * (index_count - 2);
}
@ -378,8 +398,43 @@ PrimitiveConverter::ConversionResult PrimitiveConverter::ConvertPrimitives(
// https://docs.microsoft.com/en-us/windows/desktop/direct3d9/triangle-fans
// Ordered as (v1, v2, v0), (v2, v3, v0).
if (reset) {
// TODO(Triang3l): Triangle fans with primitive restart.
return ConversionResult::kFailed;
uint32_t current_fan_index_count = 0;
uint32_t current_fan_first_index = 0;
if (index_format == IndexFormat::kInt32) {
uint32_t* target_32 = reinterpret_cast<uint32_t*>(target);
for (uint32_t i = 0; i < index_count; ++i) {
uint32_t index = source_32[i];
if (index == reset_index) {
current_fan_index_count = 0;
continue;
}
if (current_fan_index_count == 0) {
current_fan_first_index = index;
}
if (++current_fan_index_count >= 3) {
*(target_32++) = index;
*(target_32++) = source_32[i - 1];
*(target_32++) = current_fan_first_index;
}
}
} else {
uint16_t* target_16 = reinterpret_cast<uint16_t*>(target);
for (uint32_t i = 0; i < index_count; ++i) {
uint16_t index = source_16[i];
if (index == reset_index) {
current_fan_index_count = 0;
continue;
}
if (current_fan_index_count == 0) {
current_fan_first_index = index;
}
if (++current_fan_index_count >= 3) {
*(target_16++) = index;
*(target_16++) = source_16[i - 1];
*(target_16++) = uint16_t(current_fan_first_index);
}
}
}
} else {
if (index_format == IndexFormat::kInt32) {
uint32_t* target_32 = reinterpret_cast<uint32_t*>(target);