init

shaders/color_write_enable/glsl/composition.frag

@@ -0,0 +1,32 @@
+#version 450
+/* Copyright (c) 2023-2024, Mobica Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+layout (input_attachment_index = 0, binding = 0) uniform subpassInput in_color_r;
+layout (input_attachment_index = 1, binding = 1) uniform subpassInput in_color_g;
+layout (input_attachment_index = 2, binding = 2) uniform subpassInput in_color_b;
+
+layout (location = 0) out vec4 outColor;
+
+void main()
+{
+    vec4 color_r = subpassLoad(in_color_r);
+    vec4 color_g = subpassLoad(in_color_g);
+    vec4 color_b = subpassLoad(in_color_b);
+
+    outColor = color_r + color_g + color_b;
+}

shaders/color_write_enable/glsl/composition.vert

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+#version 320 es
+/* Copyright (c) 2023-2024, Mobica Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+out gl_PerVertex
+{
+        vec4 gl_Position;
+};
+
+void main()
+{
+        vec2 uv = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+        gl_Position = vec4(uv * 2.0f - 1.0f, 0.0f, 1.0f);
+}

shaders/color_write_enable/glsl/triangle_separate_channels.frag

@@ -0,0 +1,33 @@
+#version 450
+/* Copyright (c) 2023-2024, Mobica Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+layout(location = 0) in vec3 in_color;
+
+layout(location = 0) out vec4 out_color_r;
+layout(location = 1) out vec4 out_color_g;
+layout(location = 2) out vec4 out_color_b;
+
+// The full color is copied to individual attachments.
+// Each attachment has a single component bit (R, G, B) enabled
+// via the blend_attachment in ColorWriteEnable::prepare_pipelines.
+void main()
+{
+       out_color_r = vec4(in_color, 1.0f);
+       out_color_g = vec4(in_color, 1.0f);
+       out_color_b = vec4(in_color, 1.0f);
+}

shaders/color_write_enable/glsl/triangle_separate_channels.vert

@@ -0,0 +1,37 @@
+#version 450
+/* Copyright (c) 2023-2024, Mobica Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+layout(location = 0) out vec3 out_color;
+
+vec2 triangle_positions[3] = vec2[](
+    vec2(0.0, -0.5),
+    vec2(0.5, 0.5),
+    vec2(-0.5, 0.5)
+);
+
+vec3 triangle_colors[3] = vec3[](
+    vec3(1.0, 0.0, 0.0),
+    vec3(0.0, 1.0, 0.0),
+    vec3(0.0, 0.0, 1.0)
+);
+
+void main()
+{
+    gl_Position = vec4(triangle_positions[gl_VertexIndex], 0.0, 1.0);
+    out_color = triangle_colors[gl_VertexIndex];
+}

shaders/color_write_enable/hlsl/composition.frag.hlsl

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+/* Copyright (c) 2024, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+[[vk::input_attachment_index(0)]][[vk::binding(0)]] SubpassInput in_color_r;
+[[vk::input_attachment_index(1)]][[vk::binding(1)]] SubpassInput in_color_g;
+[[vk::input_attachment_index(2)]][[vk::binding(2)]] SubpassInput in_color_b;
+
+float4 main() : SV_TARGET0
+{
+    float4 color_r = in_color_r.SubpassLoad();
+    float4 color_g = in_color_g.SubpassLoad();
+    float4 color_b = in_color_b.SubpassLoad();
+
+    return color_r + color_g + color_b;
+}

shaders/color_write_enable/hlsl/composition.vert.hlsl

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+/* Copyright (c) 2024, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+};
+
+VSOutput main(uint VertexIndex : SV_VertexID)
+{
+    VSOutput output = (VSOutput) 0;
+    float2 uv = float2((VertexIndex << 1) & 2, VertexIndex & 2);
+    output.Pos = float4(uv * 2.0f - 1.0f, 0.0f, 1.0f);
+    return output;
+}

shaders/color_write_enable/hlsl/triangle_separate_channels.frag.hlsl

@@ -0,0 +1,41 @@
+/* Copyright (c) 2024, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+[[vk::location(0)]] float3 Color : COLOR0;
+};
+
+struct FSOutput
+{
+    float4 ColorR : SV_TARGET0;
+    float4 ColorG : SV_TARGET1;
+    float4 ColorB : SV_TARGET2;
+};
+
+// The full color is copied to individual attachments.
+// Each attachment has a single component bit (R, G, B) enabled
+// via the blend_attachment in ColorWriteEnable::prepare_pipelines.
+FSOutput main(VSOutput Input)
+{
+    FSOutput output = (FSOutput)0;
+    output.ColorR = float4(Input.Color, 1.0f);
+    output.ColorG = float4(Input.Color, 1.0f);
+    output.ColorB = float4(Input.Color, 1.0f);
+    return output;
+}

shaders/color_write_enable/hlsl/triangle_separate_channels.vert.hlsl

@@ -0,0 +1,43 @@
+/* Copyright (c) 2024, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+[[vk::location(0)]] float3 Color : COLOR0;
+};
+
+static float2 triangle_positions[3] = {
+    float2(0.0, -0.5),
+    float2(0.5, 0.5),
+    float2(-0.5, 0.5)
+};
+
+static float3 triangle_colors[3] = {
+    float3(1.0, 0.0, 0.0),
+    float3(0.0, 1.0, 0.0),
+    float3(0.0, 0.0, 1.0)
+};
+
+VSOutput main(uint VertexIndex : SV_VertexID)
+{
+    VSOutput output = (VSOutput) 0;
+    output.Pos = float4(triangle_positions[VertexIndex], 0.0, 1.0);
+    output.Color = triangle_colors[VertexIndex];   
+    return output;
+    }
+