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d3d9: Use a half-pixel offset when drawing a tex.

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Fixes half pixel offset issues (center of pixels is 0,0 in d3d9, but
texels are at 0.5/w,0.5/h.)
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Unknown W. Brackets 2014-09-20 07:53:16 -07:00
parent 8d4a642787
commit 6d08b363c2
1 changed files with 4 additions and 2 deletions
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6
GPU/Directx9/FramebufferDX9.cpp
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@ -323,9 +323,11 @@ namespace DX9 {
float invDestW = 1.0f / (destW * 0.5f);
float invDestH = 1.0f / (destH * 0.5f);
float halfPixelX = invDestW * 0.5f;
float halfPixelY = invDestH * 0.5f;
for (int i = 0; i < 4; i++) {
coord[i * 5] = coord[i * 5] * invDestW - 1.0f;
coord[i * 5 + 1] = -(coord[i * 5 + 1] * invDestH - 1.0f);
coord[i * 5] = coord[i * 5] * invDestW - 1.0f + halfPixelX;
coord[i * 5 + 1] = -(coord[i * 5 + 1] * invDestH - 1.0f - halfPixelY);
}
//pD3Ddevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_WIREFRAME);