shithub: gpufs

Download patch

ref: 2456c5671629b47378665485801e73aea7234856
parent: a66be92f63ec59c1811403eb7b95fa72588beee6
author: sirjofri <sirjofri@sirjofri.de>
date: Fri Feb 16 12:29:26 EST 2024 

adds missing objects.h, adds backend descriptor pools, sets, uniform binding, shader binding (untestet)


--- /dev/null
+++ b/objects.h
@@ -1,0 +1,24 @@
+typedef struct Buffer Buffer;
+struct Buffer {
+	char *buffer;
+	long len;
+};
+
+typedef struct Shader Shader;
+struct Shader {
+	u32int *buffer;
+	long len;
+	int descpool;
+};
+
+typedef struct DescSet DescSet;
+struct DescSet {
+	vlong *bindings; // id of buffer
+	int numbindings;
+};
+
+typedef struct DescPool DescPool;
+struct DescPool {
+	DescSet *sets;
+	int numsets;
+};
--- a/vm.c
+++ b/vm.c
@@ -85,6 +85,9 @@
 Object objects[256];
 int numobjects = 0;
 
+DescPool descpools[8];
+int numdescpools = 0;
+
 vlong
 genshader(void)
 {
@@ -292,4 +295,89 @@
 	buf = &objects[id].b.buffer[offset];
 	memcpy(data, buf, n);
 	return n;
+}
+
+int
+gendescpool(int numsets)
+{
+	int id;
+	if (numdescpools >= 8) {
+		werrstr("not enough pools reserved");
+		return -1;
+	}
+	
+	id = numdescpools++;
+	descpools[id].sets = malloc(sizeof(DescSet)*numsets);
+	if (!descpools[id].sets) {
+		sysfatal("out of memory");
+		return -1;
+	}
+	descpools[id].numsets = numsets;
+	memset(descpools[id].sets, 0, sizeof(DescSet)*numsets);
+	
+	return id;
+}
+
+int
+allocdescset(int pool, int set, int numbindings)
+{
+	if (pool >= numdescpools) {
+		werrstr("invalid pool id %d", pool);
+		return 0;
+	}
+	
+	if (set >= descpools[pool].numsets) {
+		werrstr("invalid set id %d", pool);
+		return 0;
+	}
+	
+	descpools[pool].sets[set].bindings = malloc(sizeof(vlong)*numbindings);
+	if (!descpools[pool].sets[set].bindings) {
+		sysfatal("out of memory");
+		return 0;
+	}
+	for (int i = 0; i < numbindings; i++) {
+		descpools[pool].sets[set].bindings[i] = -1;
+	}
+	descpools[pool].sets[set].numbindings = numbindings;
+	return 1;
+}
+
+int
+binduniform(vlong id, int pool, int set, int binding)
+{
+	if (pool >= numdescpools) {
+		werrstr("invalid pool id %d", pool);
+		return 0;
+	}
+	
+	if (set >= descpools[pool].numsets) {
+		werrstr("pool has not enough sets");
+		return 0;
+	}
+	
+	if (binding >= descpools[pool].sets[set].numbindings) {
+		werrstr("set has not enough bindings");
+		return 0;
+	}
+	
+	descpools[pool].sets[set].bindings[binding] = id;
+	return 1;
+}
+
+int
+bindshader(vlong id, int pool)
+{
+	if (!IDVALID(id)) {
+		werrstr("invalid id %lld", id);
+		return 0;
+	}
+	
+	if (objects[id].type != SHADER) {
+		werrstr("invalid object type: %lld != SHADER", id);
+		return 0;
+	}
+	
+	objects[id].s.descpool = pool;
+	return 1;
 }
--- a/vm.h
+++ b/vm.h
@@ -25,3 +25,9 @@
 // length data written
 int readshader(vlong id, void *data, long n, long offset);
 int readbuffer(vlong id, void *data, long n, long offset);
+
+// descriptor sets
+int gendescpool(int numsets);
+int allocdescset(int pool, int set, int numbindings);
+int binduniform(vlong id, int pool, int set, int binding);
+int bindshader(vlong id, int pool);
-- 
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