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Merge pull request #551 from DrChat/spv_translator 

Apply window scaling
This commit is contained in:
Ben Vanik 2016-02-21 10:49:27 -08:00
parent 32c4f3ce24 a7880645be
commit 983479adb5
1 changed files with 14 additions and 0 deletions
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14
src/xenia/gpu/spirv_shader_translator.cc
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@ -269,7 +269,11 @@ std::vector<uint8_t> SpirvShaderTranslator::CompleteTranslation() {
auto vtx_fmt_ptr = b.createAccessChain(
spv::StorageClass::StorageClassPushConstant, push_consts_,
std::vector<Id>({b.makeUintConstant(1)}));
auto window_scale_ptr = b.createAccessChain(
spv::StorageClass::StorageClassPushConstant, push_consts_,
std::vector<Id>({b.makeUintConstant(0)}));
auto vtx_fmt = b.createLoad(vtx_fmt_ptr);
auto window_scale = b.createLoad(window_scale_ptr);
auto p = b.createLoad(pos_);
auto c = b.createBinOp(spv::Op::OpFOrdNotEqual, vec4_bool_type_, vtx_fmt,
@ -291,6 +295,16 @@ std::vector<uint8_t> SpirvShaderTranslator::CompleteTranslation() {
// Reinsert w
p = b.createCompositeInsert(p_w, p, vec4_float_type_, 3);
// Apply window scaling
// pos.xy *= window_scale.xy
auto p_scaled = b.createUnaryOp(spv::Op::OpCopyObject, vec4_float_type_, p);
p_scaled = b.createBinOp(spv::Op::OpFMul, vec4_float_type_, p_scaled,
window_scale);
std::vector<uint32_t> operands({p, p_scaled});
p = b.createOp(spv::Op::OpVectorShuffle, vec4_float_type_,
{p, p_scaled, 4, 5, 2, 3});
b.createStore(p, pos_);
}