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Diffstat (limited to 'source/blender/gpu/GPU_immediate.h')
-rw-r--r-- | source/blender/gpu/GPU_immediate.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/source/blender/gpu/GPU_immediate.h b/source/blender/gpu/GPU_immediate.h new file mode 100644 index 00000000000..aeed133645c --- /dev/null +++ b/source/blender/gpu/GPU_immediate.h @@ -0,0 +1,67 @@ + +// Gawain immediate mode work-alike, take 2 +// +// This code is part of the Gawain library, with modifications +// specific to integration with Blender. +// +// Copyright 2016 Mike Erwin +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// http://www.apache.org/licenses/LICENSE-2.0 + +#pragma once + +#include "GPU_glew.h" +#include <stdbool.h> + +#define PER_THREAD +// #define PER_THREAD __thread +// MSVC uses __declspec(thread) for C code + +#define MAX_VERTEX_ATTRIBS 16 + +#define TRUST_NO_ONE 1 + +typedef enum { + KEEP_FLOAT, + KEEP_INT, + NORMALIZE_INT_TO_FLOAT, // 127 (ubyte) -> 0.5 (and so on for other int types) + CONVERT_INT_TO_FLOAT // 127 (any int type) -> 127.0 +} VertexFetchMode; + +typedef struct { + GLenum comp_type; + unsigned comp_ct; // 1 to 4 + unsigned sz; // size in bytes, 1 to 16 + unsigned offset; // from beginning of vertex, in bytes + VertexFetchMode fetch_mode; + char* name; // TODO: shared allocation of all names within a VertexFormat +} Attrib; + +typedef struct { + unsigned attrib_ct; // 0 to 16 (MAX_VERTEX_ATTRIBS) + unsigned stride; // stride in bytes, 1 to 256 + bool packed; + Attrib attribs[MAX_VERTEX_ATTRIBS]; // TODO: variable-size attribs array +} VertexFormat; + +void clear_VertexFormat(VertexFormat*); +unsigned add_attrib(VertexFormat*, const char* name, GLenum comp_type, unsigned comp_ct, VertexFetchMode); +void pack(VertexFormat*); +// unsigned attrib_idx(const VertexFormat*, const char* name); +void bind_attrib_locations(const VertexFormat*, GLuint program); + +extern PER_THREAD VertexFormat immVertexFormat; // so we don't have to copy or pass around + +void immInit(void); +void immDestroy(void); + +void immBegin(GLenum primitive, unsigned vertex_ct); +void immEnd(void); + +void immAttrib1f(unsigned attrib_id, float x); +void immAttrib3f(unsigned attrib_id, float x, float y, float z); + +void immEndVertex(void); // and move on to the next vertex |