send textures to shaders

1 files changed, 55 insertions, 0 deletions

diff --git a/video.hpp b/video.hpp
index f05af57..dc0574e 100644
--- a/video.hpp
+++ b/video.hpp
@@ -39,10 +39,35 @@ struct Vertex_Format_Id : public Primitive_Id<uint32_t> {
 struct Shader_Id : public Primitive_Id<uint32_t> {
 	using Primitive_Id<uint32_t>::Primitive_Id;
 };
+struct Sampler_Id : public Primitive_Id<uint32_t> {
+	using Primitive_Id<uint32_t>::Primitive_Id;
+};
+
+struct Descriptor {
+	enum class Type {
+		texture
+	} type;
+	int slot;
+	Descriptor* next;
+};
+
+struct Texture_Descriptor : public Descriptor {
+	Sampler_Id sampler;
+	Texture_Id texture;
+};
 
 struct Pipeline {
 	Vertex_Format_Id vertex_format;
 	Shader_Id shader;
+	Descriptor* descriptors;
+
+	int count_descriptors() const {
+		const Descriptor* d = descriptors;
+		int c = 0;
+		for (; d; d = d->next)
+			c++;
+		return c;
+	}
 };
 
 struct Colour {
@@ -92,6 +117,7 @@ struct Pipeline_Builder {
 	void begin();
 	void shader(Shader_Id s);
 	void vertex_format(Vertex_Format_Id vf);
+	void texture(int binding, Texture_Id t, Sampler_Id s);
 	Pipeline& build();
 	void validate();
 };
@@ -126,6 +152,30 @@ struct Buffer {
 	Buffer_Id id;
 };
 
+enum class Filter_Mode {
+	point,
+	linear
+};
+
+enum class Address_Mode {
+	repeat,
+	mirror,
+	clamp,
+	border
+};
+
+struct Sampler_State {
+	Filter_Mode min;
+	Filter_Mode mag;
+	Filter_Mode mip;
+	Address_Mode address_u;
+	Address_Mode address_v;
+	Address_Mode address_w;
+	float border[4];
+	float mip_bias;
+	bool aniso;
+};
+
 struct Context;
 struct Shader;
 struct Device {
@@ -156,6 +206,9 @@ struct Device {
 	void destroy_buffer(Buffer_Id id);
 
 	Shader& get_shader(Shader_Id id);
+
+	Sampler_Id create_sampler(const Sampler_State& state);
+	void destroy_sampler(Sampler_Id id);
 };
 
 struct Context {
@@ -186,6 +239,8 @@ struct Shader : public Asset {
 	int binding_index(const char* name);
 	int attribute_index(const char* name);
 	int target_index(const char* name);
+	int descriptor_index(const char* name);
+	int descriptor_stage(int slot);
 };
 
 #endif