完成透明的渲染

and_proj/app/build.gradle

@@ -21,9 +21,9 @@ android {
 		externalNativeBuild {
 			cmake {
 				abiFilters.addAll( 'arm64-v8a')
-				//arguments '-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=c++_static', '-DVKB_VALIDATION_LAYERS=OFF'
+				arguments '-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=c++_static', '-DVKB_VALIDATION_LAYERS=OFF'
-				arguments '-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=c++_static', '-DVKB_VALIDATION_LAYERS=OFF', "-DCMAKE_BUILD_TYPE=Release"
+				//arguments '-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=c++_static', '-DVKB_VALIDATION_LAYERS=OFF', "-DCMAKE_BUILD_TYPE=Release"
-				cppFlags "-DRELEASE_MODE"
+				//cppFlags "-DRELEASE_MODE"
 			}
 		}
 	}

samples/api/texture_loading/texture_loading.cpp

@@ -568,6 +568,12 @@ void TextureLoading::build_command_buffers()
 
 		vkCmdDraw(draw_cmd_buffers[i], 6, 1, 0, 0);
 
+		
+
+		draw_point_cloud(draw_cmd_buffers[i]);
+		//draw_point_cloud_line(draw_cmd_buffers[i]);
+
+
 		vkCmdBindDescriptorSets(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline_layout, 0, 1, &descriptor_set, 0, NULL);
 		vkCmdBindPipeline(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.solid);
 
@@ -576,9 +582,6 @@ void TextureLoading::build_command_buffers()
 		vkCmdBindIndexBuffer(draw_cmd_buffers[i], index_buffer->get_handle(), 0, VK_INDEX_TYPE_UINT32);
 		vkCmdDrawIndexed(draw_cmd_buffers[i], index_count, 1, 0, 0, 0);
 
-		draw_point_cloud(draw_cmd_buffers[i]);
-		//draw_point_cloud_line(draw_cmd_buffers[i]);
-
 		//draw_ui(draw_cmd_buffers[i]);
 
 		vkCmdEndRenderPass(draw_cmd_buffers[i]);
@@ -1095,15 +1098,37 @@ void TextureLoading::prepare_pipelines()
 			VK_FRONT_FACE_COUNTER_CLOCKWISE,
 			0);
 
-	VkPipelineColorBlendAttachmentState blend_attachment_state =
+	//VkPipelineColorBlendAttachmentState blend_attachment_state =
-		vkb::initializers::pipeline_color_blend_attachment_state(
+	//	vkb::initializers::pipeline_color_blend_attachment_state(
-			0xf,
+	//		0xf,
-			VK_FALSE);
+	//		VK_FALSE);
 
-	VkPipelineColorBlendStateCreateInfo color_blend_state =
+	VkPipelineColorBlendAttachmentState colorBlendAttachment{};
-		vkb::initializers::pipeline_color_blend_state_create_info(
+	colorBlendAttachment.blendEnable = VK_TRUE;
-			1,
+	colorBlendAttachment.colorWriteMask =
-			&blend_attachment_state);
+		VK_COLOR_COMPONENT_R_BIT |
+		VK_COLOR_COMPONENT_G_BIT |
+		VK_COLOR_COMPONENT_B_BIT |
+		VK_COLOR_COMPONENT_A_BIT;
+
+	// 常用的Alpha混合公式
+	colorBlendAttachment.srcColorBlendFactor = VK_BLEND_FACTOR_SRC_ALPHA;
+	colorBlendAttachment.dstColorBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
+	colorBlendAttachment.colorBlendOp = VK_BLEND_OP_ADD;
+	colorBlendAttachment.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE;
+	colorBlendAttachment.dstAlphaBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
+	colorBlendAttachment.alphaBlendOp = VK_BLEND_OP_ADD;
+
+	//VkPipelineColorBlendStateCreateInfo color_blend_state =
+	//	vkb::initializers::pipeline_color_blend_state_create_info(
+	//		1,
+	//		&blend_attachment_state);
+
+	VkPipelineColorBlendStateCreateInfo colorBlending{};
+	colorBlending.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
+	colorBlending.logicOpEnable = VK_FALSE;
+	colorBlending.attachmentCount = 1;
+	colorBlending.pAttachments = &colorBlendAttachment;
 
 	// Note: Using reversed depth-buffer for increased precision, so Greater depth values are kept
 	VkPipelineDepthStencilStateCreateInfo depth_stencil_state =
@@ -1160,7 +1185,7 @@ void TextureLoading::prepare_pipelines()
 	pipeline_create_info.pVertexInputState = &vertex_input_state;
 	pipeline_create_info.pInputAssemblyState = &input_assembly_state;
 	pipeline_create_info.pRasterizationState = &rasterization_state;
-	pipeline_create_info.pColorBlendState = &color_blend_state;
+	pipeline_create_info.pColorBlendState = &colorBlending;  //&color_blend_state;
 	pipeline_create_info.pMultisampleState = &multisample_state;
 	pipeline_create_info.pViewportState = &viewport_state;
 	pipeline_create_info.pDepthStencilState = &depth_stencil_state;
@@ -1479,7 +1504,13 @@ bool TextureLoading::prepare(const vkb::ApplicationOptions& options)
 	dataSize = lineImage.size();
 	processWithVulkan(lineImage.data(), width, height, rowStride, dataSize, texture_point_line);
 
-	load_texture();
+	const char* filename_test = "assets/test_trans.png";
+	std::vector<unsigned char> image_test;
+	unsigned w_t, h_t;
+	unsigned error_t = lodepng::decode(image_test, w_t, h_t, filename_test, LCT_RGBA, 8);
+	processWithVulkan(image_test.data(), w_t, h_t, w_t * 4, image_test.size(), texture);
+	//load_texture();
+
 	generate_quad();
 
 	prepare_uniform_buffers();

shaders/texture_loading/glsl/texture.frag

@@ -37,5 +37,9 @@ void main()
 	vec3 diffuse = max(dot(N, L), 0.0) * vec3(1.0);
 	float specular = pow(max(dot(R, V), 0.0), 16.0) * color.a;
 
-	outFragColor = vec4(diffuse * color.rgb + specular, 1.0);	
+	vec4 textureColor = color;
+	if (textureColor.a < 0.1) {
+        discard;
+    }
+	outFragColor = textureColor;
 }