Add bloom.

assets/cubyz/shaders/bloom/color_extractor.fs

@@ -0,0 +1,13 @@
+#version 430
+
+layout(location=0) out vec4 fragColor;
+
+in vec2 texCoords;
+
+layout(binding = 3) uniform sampler2D color;
+
+void main() {
+	vec3 bufferData = texture(color, texCoords).rgb;
+	float bloomFactor = max(max(bufferData.x, max(bufferData.y, bufferData.z))*4 - 1.0, 0);
+	fragColor = vec4(bufferData*bloomFactor, 1);
+}

assets/cubyz/shaders/bloom/color_extractor.vs

@@ -0,0 +1,10 @@
+#version 430
+
+layout (location=0)  in vec2 inTexCoords;
+
+out vec2 texCoords;
+
+void main() {
+	texCoords = inTexCoords;
+	gl_Position = vec4(inTexCoords*2 - vec2(1, 1), 0, 1);
+}

assets/cubyz/shaders/bloom/first_pass.fs

@@ -0,0 +1,19 @@
+#version 430
+
+layout(location=0) out vec4 fragColor;
+
+in vec2 texCoords;
+
+layout(binding = 3) uniform sampler2D color;
+
+float weights[16] = float[] (0.14804608426116522, 0.14511457538105424, 0.13666376040001485, 0.12365848409943446, 0.10750352152877563, 0.08979448915479665, 0.07206176550016223, 0.055563338564704794, 0.041162333610640485, 0.029298127479707798, 0.02003585874555622, 0.01316449727103141, 0.008310531828522687, 0.005040592352516703, 0.002937396384358805, 0.001644643437557613);
+
+void main() {
+	vec2 tex_offset = 1.0/textureSize(color, 0);
+	vec3 result = texture(color, texCoords).rgb * weights[0];
+	for(int i = 1; i < 16; i++) {
+		result += texture(color, texCoords + vec2(tex_offset.x * i, 0.0)).rgb * weights[i];
+		result += texture(color, texCoords - vec2(tex_offset.x * i, 0.0)).rgb * weights[i];
+	}
+	fragColor = vec4(result, 1);
+}

assets/cubyz/shaders/bloom/first_pass.vs

@@ -0,0 +1,10 @@
+#version 430
+
+layout (location=0)  in vec2 inTexCoords;
+
+out vec2 texCoords;
+
+void main() {
+	texCoords = inTexCoords;
+	gl_Position = vec4(inTexCoords*2 - vec2(1, 1), 0, 1);
+}

assets/cubyz/shaders/bloom/scale.fs

@@ -0,0 +1,11 @@
+#version 430
+
+layout(location=0) out vec4 fragColor;
+
+in vec2 texCoords;
+
+layout(binding = 3) uniform sampler2D color;
+
+void main() {
+	fragColor = vec4(texture(color, texCoords).rgb, 1);
+}

assets/cubyz/shaders/bloom/scale.vs

@@ -0,0 +1,10 @@
+#version 430
+
+layout (location=0)  in vec2 inTexCoords;
+
+out vec2 texCoords;
+
+void main() {
+	texCoords = inTexCoords;
+	gl_Position = vec4(inTexCoords*2 - vec2(1, 1), 0, 1);
+}

assets/cubyz/shaders/bloom/second_pass.fs

@@ -0,0 +1,19 @@
+#version 430
+
+layout(location=0) out vec4 fragColor;
+
+in vec2 texCoords;
+
+layout(binding = 3) uniform sampler2D color;
+
+float weights[16] = float[] (0.14804608426116522, 0.14511457538105424, 0.13666376040001485, 0.12365848409943446, 0.10750352152877563, 0.08979448915479665, 0.07206176550016223, 0.055563338564704794, 0.041162333610640485, 0.029298127479707798, 0.02003585874555622, 0.01316449727103141, 0.008310531828522687, 0.005040592352516703, 0.002937396384358805, 0.001644643437557613);
+
+void main() {
+	vec2 tex_offset = 1.0/textureSize(color, 0);
+	vec3 result = texture(color, texCoords).rgb * weights[0];
+	for(int i = 1; i < 16; i++) {
+		result += texture(color, texCoords + vec2(0, tex_offset.y * i)).rgb * weights[i];
+		result += texture(color, texCoords - vec2(0, tex_offset.y * i)).rgb * weights[i];
+	}
+	fragColor = vec4(result, 1);
+}

assets/cubyz/shaders/bloom/second_pass.vs

@@ -0,0 +1,10 @@
+#version 430
+
+layout(location=0) in vec2 inTexCoords;
+
+out vec2 texCoords;
+
+void main() {
+	texCoords = inTexCoords;
+	gl_Position = vec4(inTexCoords*2 - vec2(1, 1), 0, 1);
+}

assets/cubyz/shaders/chunks/chunk_fragment.fs

@@ -25,8 +25,8 @@ vec4 calcFog(vec3 pos, vec4 color, Fog fog) {
 	float distance = length(pos);
 	float fogFactor = 1.0/exp((distance*fog.density)*(distance*fog.density));
 	fogFactor = clamp(fogFactor, 0.0, 1.0);
-	vec3 resultColor = mix(fog.color, color.xyz, fogFactor);
-	return vec4(resultColor.xyz, color.w + 1 - fogFactor);
+	vec4 resultColor = mix(vec4(fog.color, 1), color, fogFactor);
+	return resultColor;
 }
 
 void main() {

assets/cubyz/shaders/chunks/chunk_vertex.vs

@@ -32,11 +32,11 @@ uniform int time;
 
 const float[6] outNormalVariations = float[6](
 	1.0, //vec3(0, 1, 0),
-	0.8, //vec3(0, -1, 0),
-	0.9, //vec3(1, 0, 0),
-	0.9, //vec3(-1, 0, 0),
-	0.95, //vec3(0, 0, 1),
-	0.8 //vec3(0, 0, -1)
+	0.88, //vec3(0, -1, 0),
+	0.92, //vec3(1, 0, 0),
+	0.92, //vec3(-1, 0, 0),
+	0.96, //vec3(0, 0, 1),
+	0.88 //vec3(0, 0, -1)
 );
 const vec3[6] normals = vec3[6](
 	vec3(0, 1, 0),

src/graphics.zig

@@ -425,6 +425,70 @@ pub const SSBO = struct {
 	}
 };
 
+pub const FrameBuffer = struct {
+	frameBuffer: c_uint,
+	texture: c_uint,
+	hasDepthBuffer: bool,
+	renderBuffer: c_uint,
+
+	pub fn init(self: *FrameBuffer, hasDepthBuffer: bool) void {
+		self.* = FrameBuffer{
+			.frameBuffer = undefined,
+			.texture = undefined,
+			.renderBuffer = undefined,
+			.hasDepthBuffer = hasDepthBuffer,
+		};
+		c.glGenFramebuffers(1, &self.frameBuffer);
+		if(hasDepthBuffer) {
+			c.glGenRenderbuffers(1, &self.renderBuffer);
+		}
+		c.glGenTextures(1, &self.texture);
+	}
+
+	pub fn deinit(self: *FrameBuffer) void {
+		c.glDeleteFramebuffers(1, &self.frameBuffer);
+		if(self.hasDepthBuffer) {
+			c.glDeleteRenderbuffers(1, &self.renderBuffer);
+		}
+		c.glDeleteTextures(1, &self.texture);
+	}
+
+	pub fn updateSize(self: *FrameBuffer, width: u31, height: u31, textureFilter: c_int, textureWrap: c_int) void {
+		c.glBindFramebuffer(c.GL_FRAMEBUFFER, self.frameBuffer);
+		if(self.hasDepthBuffer) {
+			c.glBindRenderbuffer(c.GL_RENDERBUFFER, self.renderBuffer);
+			c.glRenderbufferStorage(c.GL_RENDERBUFFER, c.GL_DEPTH24_STENCIL8, width, height);
+			c.glFramebufferRenderbuffer(c.GL_FRAMEBUFFER, c.GL_DEPTH_STENCIL_ATTACHMENT, c.GL_RENDERBUFFER, self.renderBuffer);
+		}
+
+		c.glBindTexture(c.GL_TEXTURE_2D, self.texture);
+		c.glTexImage2D(c.GL_TEXTURE_2D, 0, c.GL_RGBA8, width, height, 0, c.GL_RGBA, c.GL_UNSIGNED_BYTE, null);
+		c.glTexParameteri(c.GL_TEXTURE_2D, c.GL_TEXTURE_MIN_FILTER, textureFilter);
+		c.glTexParameteri(c.GL_TEXTURE_2D, c.GL_TEXTURE_MAG_FILTER, textureFilter);
+		c.glTexParameteri(c.GL_TEXTURE_2D, c.GL_TEXTURE_WRAP_S, textureWrap);
+		c.glTexParameteri(c.GL_TEXTURE_2D, c.GL_TEXTURE_WRAP_T, textureWrap);
+		c.glFramebufferTexture2D(c.GL_FRAMEBUFFER, c.GL_COLOR_ATTACHMENT0, c.GL_TEXTURE_2D, self.texture, 0);
+	}
+
+	pub fn validate(self: *FrameBuffer) bool {
+		c.glBindFramebuffer(c.GL_FRAMEBUFFER, self.frameBuffer);
+		defer c.glBindFramebuffer(c.GL_FRAMEBUFFER, 0);
+		if(c.glCheckFramebufferStatus(c.GL_FRAMEBUFFER) != c.GL_FRAMEBUFFER_COMPLETE) {
+			std.log.err("Frame Buffer Object error: {}", .{c.glCheckFramebufferStatus(c.GL_FRAMEBUFFER)});
+			return false;
+		}
+		return true;
+	}
+
+	pub fn bind(self: *FrameBuffer) void {
+		c.glBindFramebuffer(c.GL_FRAMEBUFFER, self.frameBuffer);
+	}
+
+	pub fn unbind() void {
+		c.glBindFramebuffer(c.GL_FRAMEBUFFER, 0);
+	}
+};
+
 pub const TextureArray = struct {
 	textureID: c_uint,
 

src/renderer.zig

@@ -47,12 +47,14 @@ pub fn init() !void {
 	deferredRenderPassShader = try Shader.create("assets/cubyz/shaders/deferred_render_pass.vs", "assets/cubyz/shaders/deferred_render_pass.fs");
 	deferredUniforms = deferredRenderPassShader.bulkGetUniformLocation(@TypeOf(deferredUniforms));
 	buffers.init();
+	try Bloom.init();
 }
 
 pub fn deinit() void {
 	fogShader.delete();
 	deferredRenderPassShader.delete();
 	buffers.deinit();
+	Bloom.deinit();
 }
 
 const buffers = struct {
@@ -321,9 +323,9 @@ pub fn renderWorld(world: *World, ambientLight: Vec3f, skyColor: Vec3f, playerPo
 //				glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 //			}
 //		}
-//		if(ClientSettings.BLOOM) {
-//			BloomRenderer.render(buffers, Window.getWidth(), Window.getHeight()); // TODO: Use true width/height
-//		}
+	if(settings.bloom) {
+		Bloom.render(main.Window.width, main.Window.height);
+	}
 	buffers.unbind();
 	buffers.bindTextures();
 	deferredRenderPassShader.bind();
@@ -385,6 +387,110 @@ pub fn renderWorld(world: *World, ambientLight: Vec3f, skyColor: Vec3f, playerPo
 //	}
 //}
 
+const Bloom = struct {
+	var buffer1: graphics.FrameBuffer = undefined;
+	var buffer2: graphics.FrameBuffer = undefined;
+	var extractedBuffer: graphics.FrameBuffer = undefined;
+	var width: u31 = std.math.maxInt(u31);
+	var height: u31 = std.math.maxInt(u31);
+	var firstPassShader: graphics.Shader = undefined;
+	var secondPassShader: graphics.Shader = undefined;
+	var colorExtractShader: graphics.Shader = undefined;
+	var scaleShader: graphics.Shader = undefined;
+
+	pub fn init() !void {
+		buffer1.init(false);
+		buffer2.init(false);
+		extractedBuffer.init(false);
+		firstPassShader = try graphics.Shader.create("assets/cubyz/shaders/bloom/first_pass.vs", "assets/cubyz/shaders/bloom/first_pass.fs");
+		secondPassShader = try graphics.Shader.create("assets/cubyz/shaders/bloom/second_pass.vs", "assets/cubyz/shaders/bloom/second_pass.fs");
+		colorExtractShader = try graphics.Shader.create("assets/cubyz/shaders/bloom/color_extractor.vs", "assets/cubyz/shaders/bloom/color_extractor.fs");
+		scaleShader = try graphics.Shader.create("assets/cubyz/shaders/bloom/scale.vs", "assets/cubyz/shaders/bloom/scale.fs");
+	}
+
+	pub fn deinit() void {
+		buffer1.deinit();
+		buffer2.deinit();
+		extractedBuffer.deinit();
+		firstPassShader.delete();
+		secondPassShader.delete();
+		colorExtractShader.delete();
+		scaleShader.delete();
+	}
+
+	fn extractImageData() void {
+		colorExtractShader.bind();
+		buffers.bindTextures();
+		extractedBuffer.bind();
+		c.glBindVertexArray(graphics.Draw.rectVAO);
+		c.glDrawArrays(c.GL_TRIANGLE_STRIP, 0, 4);
+	}
+
+	fn downscale() void {
+		scaleShader.bind();
+		c.glActiveTexture(c.GL_TEXTURE3);
+		c.glBindTexture(c.GL_TEXTURE_2D, extractedBuffer.texture);
+		buffer1.bind();
+		c.glBindVertexArray(graphics.Draw.rectVAO);
+		c.glDrawArrays(c.GL_TRIANGLE_STRIP, 0, 4);
+	}
+
+	fn firstPass() void {
+		firstPassShader.bind();
+		c.glActiveTexture(c.GL_TEXTURE3);
+		c.glBindTexture(c.GL_TEXTURE_2D, buffer1.texture);
+		buffer2.bind();
+		c.glBindVertexArray(graphics.Draw.rectVAO);
+		c.glDrawArrays(c.GL_TRIANGLE_STRIP, 0, 4);
+	}
+
+	fn secondPass() void {
+		secondPassShader.bind();
+		c.glActiveTexture(c.GL_TEXTURE3);
+		c.glBindTexture(c.GL_TEXTURE_2D, buffer2.texture);
+		buffer1.bind();
+		c.glBindVertexArray(graphics.Draw.rectVAO);
+		c.glDrawArrays(c.GL_TRIANGLE_STRIP, 0, 4);
+	}
+
+	fn upscale() void {
+		scaleShader.bind();
+		c.glActiveTexture(c.GL_TEXTURE3);
+		c.glBindTexture(c.GL_TEXTURE_2D, buffer1.texture);
+		buffers.bind();
+		c.glBindVertexArray(graphics.Draw.rectVAO);
+		c.glDrawArrays(c.GL_TRIANGLE_STRIP, 0, 4);
+	}
+
+	pub fn render(currentWidth: u31, currentHeight: u31) void {
+		if(width != currentWidth or height != currentHeight) {
+			width = currentWidth;
+			height = currentHeight;
+			buffer1.updateSize(width/2, height/2, c.GL_LINEAR, c.GL_CLAMP_TO_EDGE);
+			std.debug.assert(buffer1.validate());
+			buffer2.updateSize(width/2, height/2, c.GL_LINEAR, c.GL_CLAMP_TO_EDGE);
+			std.debug.assert(buffer2.validate());
+			extractedBuffer.updateSize(width, height, c.GL_LINEAR, c.GL_CLAMP_TO_EDGE);
+			std.debug.assert(extractedBuffer.validate());
+		}
+		c.glDisable(c.GL_DEPTH_TEST);
+		c.glDisable(c.GL_CULL_FACE);
+
+		extractImageData();
+		c.glViewport(0, 0, width/2, height/2);
+		downscale();
+		firstPass();
+		secondPass();
+		c.glViewport(0, 0, width, height);
+		c.glBlendFunc(c.GL_ONE, c.GL_ONE);
+		upscale();
+
+		c.glEnable(c.GL_DEPTH_TEST);
+		c.glEnable(c.GL_CULL_FACE);
+		c.glBlendFunc(c.GL_SRC_ALPHA, c.GL_ONE_MINUS_SRC_ALPHA);
+	}
+};
+
 pub const Frustum = struct {
 	const Plane = struct {
 		pos: Vec3f,

src/settings.zig

@@ -16,4 +16,6 @@ pub var fov: f32 = 45;
 pub var mouseSensitivity: f32 = 1;
 
 pub var renderDistance: i32 = 4;
-pub var LODFactor: f32 = 2.0;
+pub var LODFactor: f32 = 2.0;
+
+pub var bloom: bool = true;