From 10dd41669492f7582c26bd3989536a66278df75d Mon Sep 17 00:00:00 2001 From: Manuel Stoeckl Date: Sat, 19 Nov 2022 21:47:27 -0500 Subject: render/vulkan: allow rendering to non-8-bit buffers This is implemented by a two-subpass rendering scheme; the first subpass draws (and blends) onto a linear R16G16B16A16_SFLOAT buffer, while the second subpass performs linear->srgb conversion, writing onto the actual output buffer. --- render/vulkan/shaders/output.frag | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 render/vulkan/shaders/output.frag (limited to 'render/vulkan/shaders/output.frag') diff --git a/render/vulkan/shaders/output.frag b/render/vulkan/shaders/output.frag new file mode 100644 index 00000000..28a8cdc5 --- /dev/null +++ b/render/vulkan/shaders/output.frag @@ -0,0 +1,21 @@ +#version 450 + +layout (input_attachment_index = 0, binding = 0) uniform subpassInput in_color; + +layout(location = 0) in vec2 uv; +layout(location = 0) out vec4 out_color; + +float linear_to_srgb(float x) { + return max(min(x * 12.92, 0.04045), 1.055 * pow(x, 1. / 2.4) - 0.055); +} + +void main() { + vec4 val = subpassLoad(in_color).rgba; + out_color = vec4( + linear_to_srgb(val.r), + linear_to_srgb(val.g), + linear_to_srgb(val.b), + val.a + ); +} + -- cgit v1.2.3