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gsdx ogl: implement RT channel fetch 

Fix blending of Metal Gear Solid/KillZone (and potentially other games)

Potentially impact issue #905, #594, #914, #896
This commit is contained in:
Gregory Hainaut 2016-04-28 22:52:22 +02:00
parent c445a14c46
commit cb19451418
1 changed files with 20 additions and 3 deletions
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23
plugins/GSdx/GSRendererOGL.cpp
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@ -126,6 +126,21 @@ void GSRendererOGL::SetupIA()
{
GSDeviceOGL* dev = (GSDeviceOGL*)m_dev;
if (m_channel_shuffle) {
// Oh a nice hack !
// Replace current draw with a fullscreen sprite
GSVertex* s = &m_vertex.buff[0];
s[0].XYZ.X = m_context->XYOFFSET.OFX + 0;
s[1].XYZ.X = m_context->XYOFFSET.OFX + 16384;
s[0].XYZ.Y = m_context->XYOFFSET.OFY + 0;
s[1].XYZ.Y = m_context->XYOFFSET.OFY + 16384;
m_vertex.head = m_vertex.tail = m_vertex.next = 4;
m_index.tail = 2;
}
if (!GLLoader::found_geometry_shader)
EmulateGS();
@ -748,19 +763,21 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
// Special Draw Call
if (m_channel_shuffle) {
if (m_context->CLAMP.WMS == 3 && ((m_context->CLAMP.MAXU & 0x8) == 8)) {
// Read either blue or Alpha. Let's go for Blue ;)
// MGS3/Kill Zone
GL_INS("Blue channel");
ps_sel.channel = 3;
} else if (m_context->CLAMP.WMS == 3 && ((m_context->CLAMP.MINU & 0x8) == 0)) {
// Read either Red or Green. Let's go for Red ;)
// Pop
GL_INS("Red channel");
ps_sel.channel = 1;
} else {
GL_INS("channel not supported");
ASSERT(0);
}
glTextureBarrier();
}
//
@ -1056,8 +1073,8 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
dev->SetupPipeline(vs_sel, gs_sel, ps_sel);
// rs
GSVector4i scissor = GSVector4i(GSVector4(rtscale).xyxy() * m_context->scissor.in).rintersect(GSVector4i(rtsize).zwxy());
const GSVector4& hacked_scissor = m_channel_shuffle ? GSVector4(0, 0, 1024, 1024) : m_context->scissor.in;
GSVector4i scissor = GSVector4i(GSVector4(rtscale).xyxy() * hacked_scissor).rintersect(GSVector4i(rtsize).zwxy());
GL_PUSH("IA");
SetupIA();