bloom场景 添加模糊

main.cpp

@@ -90,6 +90,15 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 	hdrProgram.DetectAttribute("texcoord");
 	hdrProgram.DetectUniform("U_MainTexture");
 
+	//¸ß˹ģºý
+	GPUProgram gaussianProgram;
+	gaussianProgram.AttachShader(GL_VERTEX_SHADER, "res/shader/fullscreenquad.vs");
+	gaussianProgram.AttachShader(GL_FRAGMENT_SHADER, "res/shader/fullscreenquad_gaussian.fs");
+	gaussianProgram.Link();
+	gaussianProgram.DetectAttribute("pos");
+	gaussianProgram.DetectAttribute("texcoord");
+	gaussianProgram.DetectUniform("U_MainTexture");
+
 	//combine program
 	GPUProgram combineProgram;
 	combineProgram.AttachShader(GL_VERTEX_SHADER, "res/shader/fullscreenquad.vs");
@@ -188,7 +197,6 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 	FBO fbo;
 	fbo.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight);
 	fbo.AttachDepthBuffer("depth", viewportWidth, viewportHeight);
-	fbo.Finish();
 
 	FBO HDRfbo;
 	HDRfbo.AttachColorBuffer("color", GL_COLOR_ATTACHMENT0, GL_RGBA, viewportWidth, viewportHeight);
@@ -252,8 +260,16 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 		glUseProgram(0);
 		HDRfbo.Unbind();
 
-		glFlush();
+		fbo.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();
 
+		glFlush();
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		glActiveTexture(GL_TEXTURE0);
 
@@ -267,10 +283,15 @@ INT WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _
 		glUniform1i(hdrProgram.GetLocation("U_MainTexture"), 0);
 		fsq.DrawToRightTop(hdrProgram.GetLocation("pos"), hdrProgram.GetLocation("texcoord"));
 
+		glUseProgram(gaussianProgram.mProgram);
+		glBindTexture(GL_TEXTURE_2D, fbo.GetBuffer("color"));
+		glUniform1i(gaussianProgram.GetLocation("U_MainTexture"), 0);
+		fsq.DrawToLeftBottom(gaussianProgram.GetLocation("pos"), gaussianProgram.GetLocation("texcoord"));
+
 		glUseProgram(combineProgram.mProgram);
+		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, HDRfbo.GetBuffer("color"));
 		glUniform1i(combineProgram.GetLocation("U_MainTexture"), 0);
-
 		glActiveTexture(GL_TEXTURE1);
 		glBindTexture(GL_TEXTURE_2D, HDRfbo.GetBuffer("hdrcolor"));
 		glUniform1i(combineProgram.GetLocation("U_HDRTexture"), 1);