Vulkan: scene rendering (D1–D7) on a scene walk shared with GL (N6a, N6b)

shaders/vk14/postfx_tonemapping.frag

@@ -0,0 +1,40 @@
+#version 460 core
+#define STAGE_FRAGMENT 1
+#define LAYOUT_POST 1
+#include "common.glsl"
+layout(location = 14) in vec2 f_coords;
+
+layout(location = 0) out vec4 out_color;
+
+#pragma texture(tex1, 0, RGB)
+layout(set = POST_SET, binding = POST_TEXTURE_FIRST + 0) uniform sampler2D tex1;
+
+// glow of the bright parts of the image (postfx_bloom_*.frag)
+#pragma texture(bloom_tex, 1, RGB)
+layout(set = POST_SET, binding = POST_TEXTURE_FIRST + 1) uniform sampler2D bloom_tex;
+
+// the automatic exposure (exposure_ssbo of the opengl renderer, exposure_average.comp) comes in a later stage: the fixed
+// exposure multiplier alone
+const float exposure = 0.0;
+
+#include "tonemapping.glsl"
+#include "dither.glsl"
+
+// param is pc.data of the push constants (the model block in the opengl renderer).
+// param[0].x: share of the bloom in the image (0: no bloom, the texture is not read), param[0].y: 1 if the automatic
+// exposure is applied (there is none yet, so it has no effect), param[0].z: fixed exposure multiplier, param[0].w: scale of
+// the bloom texture (it holds the sum of the levels of the chain), param[1].x: 1 when this is the last pass before the
+// window, which takes the dither
+void main()
+{
+	vec2 texcoord = f_coords;
+	vec3 hdr_color = texture(tex1, texcoord).xyz;
+	if (param[0].x > 0.0)
+		hdr_color = mix(hdr_color, texture(bloom_tex, texcoord).rgb * param[0].w, param[0].x);
+	float exposurescale = param[0].z;
+	if (param[0].y > 0.5 && exposure > 0.0)
+		exposurescale *= exposure;
+	out_color = tonemap(vec4(hdr_color * exposurescale, 1.0));
+	if (param[1].x > 0.5)
+		out_color.rgb = dither_output(out_color.rgb);
+}