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Pica: Implement texture wrapping.

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This commit is contained in:
Tony Wasserka 2014-12-04 17:37:59 +01:00
parent c81f1a9ebc
commit 0fba1d48a6
2 changed files with 31 additions and 2 deletions
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21
src/video_core/rasterizer.cpp
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@ -181,7 +181,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
if (!texture.enabled)
continue;
_dbg_assert_(GPU, 0 != texture.config.address);
_dbg_assert_(HW_GPU, 0 != texture.config.address);
// Images are split into 8x8 tiles. Each tile is composed of four 4x4 subtiles each
// of which is composed of four 2x2 subtiles each of which is composed of four texels.
@ -206,6 +206,25 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
// somewhat inefficient code around for now.
int s = (int)(uv[i].u() * float24::FromFloat32(static_cast<float>(texture.config.width))).ToFloat32();
int t = (int)(uv[i].v() * float24::FromFloat32(static_cast<float>(texture.config.height))).ToFloat32();
auto GetWrappedTexCoord = [](Regs::TextureConfig::WrapMode mode, int val, unsigned size) {
switch (mode) {
case Regs::TextureConfig::ClampToEdge:
val = std::max(val, 0);
val = std::min(val, (int)size - 1);
return val;
case Regs::TextureConfig::Repeat:
return (int)(((unsigned)val) % size);
default:
LOG_ERROR(HW_GPU, "Unknown texture coordinate wrapping mode %x\n", (int)mode);
_dbg_assert_(HW_GPU, 0);
return 0;
}
};
s = GetWrappedTexCoord(registers.texture0.wrap_s, s, registers.texture0.width);
t = GetWrappedTexCoord(registers.texture0.wrap_t, t, registers.texture0.height);
int texel_index_within_tile = 0;
for (int block_size_index = 0; block_size_index < 3; ++block_size_index) {
int sub_tile_width = 1 << block_size_index;