brought back functionality from previous builds but now cross-platform

funnyassets/gfx_shaders/mesh_bindings.h

@@ -0,0 +1 @@
+#include "shader_base.h"

funnyassets/gfx_shaders/mesh_frag.slang

@@ -1,23 +1,12 @@
 #include "mesh_shared.slang"
 
-uint32_t hash32(uint32_t x) {
-    x = ((x >> 16) ^ x) * 0x45d9f3b;
-    x = ((x >> 16) ^ x) * 0x45d9f3b;
-    x = (x >> 16) ^ x;
-    return x;
-}
-
-[[vk::binding(1)]]
-uniform Sampler2D textures[];
 
 [shader("fragment")]
-float4 main(
+float4 _main(
 	VertexOutput input,
 	uint triid: SV_PrimitiveID,
-	uniform PushConstants constants,
 ) : SV_TARGET
 {
-	return float4(textures[constants.albedoID].Sample(input.uv).xyz, 1);
-
+	return float4(SampleTexture(albedoID, input.uv).xyz,1);
 }
 

funnyassets/gfx_shaders/mesh_shared.slang

@@ -1,4 +1,5 @@
 #pragma once
+#include "shader_base.h"
 
 struct VertexOutput
 {
@@ -6,10 +7,17 @@ struct VertexOutput
 	float2 uv: TEXCOORD0;
 };
 
-struct PushConstants
+DECLARE_CONSTANTS()
 {
 	float4x4 modelMatrix;
 	uint albedoID;
 	uint roughnessID;
 	uint metalnessID;
 };
+
+DECLARE_CBUFFER(0)
+{
+	float4x4 projection;
+};
+
+DECLARE_TEXTURES(1)

funnyassets/gfx_shaders/mesh_vert.slang

@@ -1,3 +1,4 @@
+#include "shader_base.h"
 #include "mesh_shared.slang"
 
 struct VertexInput
@@ -6,20 +7,13 @@ struct VertexInput
 	float2 uv: TEXCOORD0;
 };
 
-[[vk::binding(0)]]
-cbuffer CameraInfo
-{
-	float4x4 projection;
-};
-
 [shader("vertex")]
-VertexOutput main(
+VertexOutput _main(
 	VertexInput input,
-	uniform PushConstants constants,
 )
 {
 	VertexOutput output;
-	output.position = mul(projection, mul(constants.modelMatrix, float4(input.position,1)));
+	output.position = mul(projection, mul(modelMatrix, float4(input.position,1)));
 	output.uv = input.uv;
 	return output;
 }

funnyassets/gfx_shaders/shader_base.h

@@ -0,0 +1,85 @@
+#ifndef SHADER_BASE_SLANG
+#define SHADER_BASE_SLANG
+
+/*
+ * I hope you are not looking at these war crimes.
+ * They are truly horrible crimes.
+ * Don't even try to understand what the fuck is happening here.
+ */
+
+#if defined(__METAL__)
+/* We hijack all the argument buffers, which allows to use a bit more textures at cost of buffers */
+#define DECLARE_TEXTURES(b) \
+struct TextureBinding {Texture2D textures[96];}; \
+[[vk::binding(21)]] ParameterBlock<TextureBinding> g_textures0 : register(t21); \
+ParameterBlock<TextureBinding> g_textures1 : register(t22); \
+ParameterBlock<TextureBinding> g_textures2 : register(t23); \
+ParameterBlock<TextureBinding> g_textures3 : register(t24); \
+ParameterBlock<TextureBinding> g_textures4 : register(t25); \
+ParameterBlock<TextureBinding> g_textures5 : register(t26); \
+ParameterBlock<TextureBinding> g_textures6 : register(t27); \
+ParameterBlock<TextureBinding> g_textures7 : register(t28);
+
+void _mlGetSampler()
+{
+	__intrinsic_asm R"(
+	constexpr sampler s(filter::linear, address::repeat);
+	return s;
+	)";
+}
+SamplerState mlGetSampler()
+{
+	_mlGetSampler();
+};
+
+float4 SampleTexture(uint32_t binding, float2 uv)
+{
+	SamplerState sampler = mlGetSampler();
+	uint8_t textureArray = 0;
+	uint8_t textureSamplerArray = (binding >> 16) & 0xFF;
+	uint8_t textureSampler = (binding >> 8) & 0xFF;
+	uint8_t textureIndex = 1;
+	return g_textures0.textures[1].Sample(sampler, uv);
+};
+
+#define DECLARE_CBUFFER(b) \
+[[vk::binding(b)]] cbuffer cbuffer_##b : register(t##b)
+
+#define DECLARE_CONSTANTS() \
+[[vk::push_constant]] \
+cbuffer cbuffer_constants : register(t29)
+
+
+#elif defined(__SPIRV__)
+
+#define DECLARE_TEXTURES(b) \
+[[vk::binding(b)]] \
+Sampler2D g_textures[];
+
+float4 SampleTexture(uint32_t binding, float2 uv)
+{
+	return g_textures[binding].Sample(uv);
+};
+
+#define DECLARE_CBUFFER(b) \
+[[vk::binding(b)]] \
+cbuffer cbuffer_##b
+
+
+#define DECLARE_DATA(b,r) \
+[[vk::binding(b)]] \
+r
+
+#define DECLARE_CONSTANTS() \
+[[vk::push_constant]] \
+cbuffer cbuffer_constants
+
+#else
+#define DECLARE_TEXTURES()
+float4 SampleTexture(uint32_t binding, float2 uv);
+#define DECLARE_CBUFFER() cbuffer cbuffer_constats
+#define DECLARE_DATA() cbuffer cbuffer_constats
+#define DECLARE_CONSTANTS() cbuffer cbuffer_constats
+#endif
+
+#endif