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Grok EFB pixel format to determine whether render target has alpha, thus fixing the "Stage Clear" screen in SSBM.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3588 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Nolan Check
2009-06-29 00:52:54 +00:00
parent 07a767691d
commit 5717f1f15b
3 changed files with 18 additions and 2 deletions
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11
Source/Plugins/Plugin_VideoOGL/Src/FramebufferManager.cpp
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@ -25,6 +25,17 @@ void FramebufferManager::Init(int targetWidth, int targetHeight, int msaaSamples
m_msaaSamples = msaaSamples;
m_msaaCoverageSamples = msaaCoverageSamples;
// The EFB can be set to different pixel formats by the game through the
// BPMEM_ZCOMPARE register (which should probably have a different name).
// They are:
// - 24-bit RGB (8-bit components) with 24-bit Z
// - 24-bit RGBA (6-bit components) with 24-bit Z
// - Multisampled 16-bit RGB (5-6-5 format) with 16-bit Z
// We only use one EFB format here: 32-bit ARGB with 24-bit Z.
// Multisampling depends on user settings.
// The distinction becomes important for certain operations, i.e. the
// alpha channel should be ignored if the EFB does not have one.
// Create EFB target.
glGenFramebuffersEXT(1, &m_efbFramebuffer);