bloom最终效果

main.cpp

@@ -194,9 +194,12 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 	fsq.Init();
 
 	//³õʼ»¯FBO
-	FBO fbo;
-	fbo.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight);
-	fbo.AttachDepthBuffer("depth", viewportWidth, viewportHeight);
+	FBO fbo[2];
+	fbo[0].AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight);
+	fbo[0].AttachDepthBuffer("depth", viewportWidth, viewportHeight);
+	fbo[1].AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight);
+	fbo[1].AttachDepthBuffer("depth", viewportWidth, viewportHeight);
+
 
 	FBO HDRfbo;
 	HDRfbo.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight);
@@ -207,7 +210,7 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 	ShowWindow(hwnd, SW_SHOW);
 	UpdateWindow(hwnd);
 
-	glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
+	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 	MSG msg;
 	while (true)
 	{
@@ -260,14 +263,43 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 		glUseProgram(0);
 		HDRfbo.Unbind();
 
-		fbo.Bind();
+		/* blur start */
+		fbo[0].Bind();
 		glUseProgram(gaussianProgram.mProgram);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, HDRfbo.GetBuffer("hdrcolor"));
 		glUniform1i(gaussianProgram.GetLocation("U_MainTexture"), 0);
 		fsq.Draw(gaussianProgram.GetLocation("pos"), gaussianProgram.GetLocation("texcoord"));
-		fbo.Unbind();
+		fbo[0].Unbind();
+
+		fbo[1].Bind();
+		glUseProgram(gaussianProgram.mProgram);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, fbo[0].GetBuffer("color"));
+		glUniform1i(gaussianProgram.GetLocation("U_MainTexture"), 0);
+		fsq.Draw(gaussianProgram.GetLocation("pos"), gaussianProgram.GetLocation("texcoord"));
+		fbo[1].Unbind();
+
+		fbo[0].Bind();
+		glUseProgram(gaussianProgram.mProgram);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, fbo[1].GetBuffer("color"));
+		glUniform1i(gaussianProgram.GetLocation("U_MainTexture"), 0);
+		fsq.Draw(gaussianProgram.GetLocation("pos"), gaussianProgram.GetLocation("texcoord"));
+		fbo[0].Unbind();
+
+		fbo[1].Bind();
+		glUseProgram(gaussianProgram.mProgram);
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, fbo[0].GetBuffer("color"));
+		glUniform1i(gaussianProgram.GetLocation("U_MainTexture"), 0);
+		fsq.Draw(gaussianProgram.GetLocation("pos"), gaussianProgram.GetLocation("texcoord"));
+		fbo[1].Unbind();
+		/* blur end */
 
 		glFlush();
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -284,7 +316,7 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 		fsq.DrawToRightTop(hdrProgram.GetLocation("pos"), hdrProgram.GetLocation("texcoord"));
 
 		glUseProgram(gaussianProgram.mProgram);
-		glBindTexture(GL_TEXTURE_2D, fbo.GetBuffer("color"));
+		glBindTexture(GL_TEXTURE_2D, fbo[1].GetBuffer("color"));
 		glUniform1i(gaussianProgram.GetLocation("U_MainTexture"), 0);
 		fsq.DrawToLeftBottom(gaussianProgram.GetLocation("pos"), gaussianProgram.GetLocation("texcoord"));
 
@@ -293,7 +325,7 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 		glBindTexture(GL_TEXTURE_2D, HDRfbo.GetBuffer("color"));
 		glUniform1i(combineProgram.GetLocation("U_MainTexture"), 0);
 		glActiveTexture(GL_TEXTURE1);
-		glBindTexture(GL_TEXTURE_2D, HDRfbo.GetBuffer("hdrcolor"));
+		glBindTexture(GL_TEXTURE_2D, fbo[1].GetBuffer("color"));
 		glUniform1i(combineProgram.GetLocation("U_HDRTexture"), 1);
 		fsq.DrawToRightBottom(combineProgram.GetLocation("pos"), combineProgram.GetLocation("texcoord"));
 

res/shader/hdr.fs

@@ -71,9 +71,6 @@ void main()
 	vec4 color = ambientColor + diffuseColor + specularColor;
 	
 
-	if(color.r > 1.0){
-		gl_FragData[1] = color;
-	} else {
-		gl_FragData[0] = color;
-	}
+	gl_FragData[0] = color;
+	gl_FragData[1] = vec4(0.0);
 }