From d946e4e23830d3070319f17e570559dad667333b Mon Sep 17 00:00:00 2001
From: Tony Wasserka <NeoBrainX@gmail.com>
Date: Sat, 23 Nov 2013 12:33:03 +0100
Subject: [PATCH] OpenGL: Implement color and z pokes.

---
 Source/Core/VideoBackends/OGL/Render.cpp | 44 +++++++++++++++++++++---
 1 file changed, 39 insertions(+), 5 deletions(-)

diff --git a/Source/Core/VideoBackends/OGL/Render.cpp b/Source/Core/VideoBackends/OGL/Render.cpp
index cd682137b6..bbe2169182 100644
--- a/Source/Core/VideoBackends/OGL/Render.cpp
+++ b/Source/Core/VideoBackends/OGL/Render.cpp
@@ -1064,12 +1064,46 @@ u32 Renderer::AccessEFB(EFBAccessType type, u32 x, u32 y, u32 poke_data)
 		}
 
 	case POKE_COLOR:
-	case POKE_Z:
-		// TODO: Implement. One way is to draw a tiny pixel-sized rectangle at
-		// the exact location. Note: EFB pokes are susceptible to Z-buffering
-		// and perhaps blending.
-		//WARN_LOG(VIDEOINTERFACE, "This is probably some kind of software rendering");
+	{
+		ResetAPIState();
+
+		glClearColor(float((poke_data >> 16) & 0xFF) / 255.0f,
+		             float((poke_data >>  8) & 0xFF) / 255.0f,
+		             float((poke_data >>  0) & 0xFF) / 255.0f,
+		             float((poke_data >> 24) & 0xFF) / 255.0f);
+
+		glEnable(GL_SCISSOR_TEST);
+		glScissor(targetPixelRc.left, targetPixelRc.bottom, targetPixelRc.GetWidth(), targetPixelRc.GetHeight());
+
+		glClear(GL_COLOR_BUFFER_BIT);
+
+		RestoreAPIState();
+
+		// TODO: Could just update the EFB cache with the new value
+		ClearEFBCache();
+
 		break;
+	}
+
+	case POKE_Z:
+	{
+		ResetAPIState();
+
+		glDepthMask(GL_TRUE);
+		glClearDepthf(float(poke_data & 0xFFFFFF) / float(0xFFFFFF));
+
+		glEnable(GL_SCISSOR_TEST);
+		glScissor(targetPixelRc.left, targetPixelRc.bottom, targetPixelRc.GetWidth(), targetPixelRc.GetHeight());
+
+		glClear(GL_DEPTH_BUFFER_BIT);
+
+		RestoreAPIState();
+
+		// TODO: Could just update the EFB cache with the new value
+		ClearEFBCache();
+
+		break;
+	}
 
 	default:
 		break;