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| author | Eugene Sandulenko | 2016-05-02 22:18:32 +0200 |
|---|---|---|
| committer | Eugene Sandulenko | 2016-05-02 22:19:14 +0200 |
| commit | b72890ea30ba47e4817fd294879b255c28680c0b (patch) | |
| tree | b0669f594ce3a9f974f0944b268dd92135e626ea /engines/scumm | |
| parent | 60729f38be6cd0743fa501c45734c5fbd2a2262c (diff) | |
| download | scummvm-rg350-b72890ea30ba47e4817fd294879b255c28680c0b.tar.gz scummvm-rg350-b72890ea30ba47e4817fd294879b255c28680c0b.tar.bz2 scummvm-rg350-b72890ea30ba47e4817fd294879b255c28680c0b.zip | |
SCUMM HE: Implement premultiplied transparency rendering
Diffstat (limited to 'engines/scumm')
| -rw-r--r-- | engines/scumm/he/moonbase/moonbase.cpp | 24 | ||||
| -rw-r--r-- | engines/scumm/he/wiz_he.cpp | 1 |
2 files changed, 24 insertions, 1 deletions
diff --git a/engines/scumm/he/moonbase/moonbase.cpp b/engines/scumm/he/moonbase/moonbase.cpp index a24d1463e3..5eabd0a8ab 100644 --- a/engines/scumm/he/moonbase/moonbase.cpp +++ b/engines/scumm/he/moonbase/moonbase.cpp @@ -104,8 +104,30 @@ void Moonbase::blitT14WizImage(uint8 *dst, int dstw, int dsth, int dstPitch, con pixels -= code; } else { // special case if (width - pixels >= srcx) { + int alpha = code >> 1; uint16 color = READ_LE_UINT16(singlesOffset); - WRITE_LE_UINT16(dst1, color); + + //WRITE_LE_UINT16(dst1, color); // ENABLE_PREMUL_ALPHA = 0 + // ENABLE_PREMUL_ALPHA = 2 + if (alpha > 32) { + alpha -= 32; + + uint32 orig = READ_LE_UINT16(dst1); + uint32 oR = orig & 0x7c00; + uint32 oG = orig & 0x03e0; + uint32 oB = orig & 0x1f; + uint32 dR = ((((color & 0x7c00) - oR) * alpha) >> 5) + oR; + uint32 dG = ((((color & 0x3e0) - oG) * alpha) >> 5) + oG; + uint32 dB = ((((color & 0x1f) - oB) * alpha) >> 5) + oB; + + WRITE_LE_UINT16(dst1, (dR & 0x7c00) | (dG & 0x3e0) | (dB & 0x1f)); + } else { + uint32 orig = READ_LE_UINT16(dst1); + uint32 pass1 = ((((orig << 16) | orig) & 0x3e07c1f * alpha) >> 5) & 0x3e07c1f; + uint32 pass2 = (((pass1 << 16) | pass1) + color) & 0xffff; + WRITE_LE_UINT16(dst1, pass2); + } + dst1 += 2; } singlesOffset += 2; diff --git a/engines/scumm/he/wiz_he.cpp b/engines/scumm/he/wiz_he.cpp index fdb89823b4..055df25e49 100644 --- a/engines/scumm/he/wiz_he.cpp +++ b/engines/scumm/he/wiz_he.cpp @@ -1773,6 +1773,7 @@ void Wiz::copy555WizImage(uint8 *dst, uint8 *wizd, int dstPitch, int dstType, switch (rawROP) { default: case 1: + // MMX_PREMUL_ALPHA_COPY break; case 2: |