Mike Erwin
76c99f361f
Fixed compile error in debug build (thanks mont29) Renamed some functions for consistency. New features: Create a Batch with immediate mode! Just use immBeginBatch instead of immBegin. You can keep the result and draw it as many times as you like. This partially replaces the need for display lists. Copy a VertexFormat, and create a VertexBuffer using an existing format. Resize a VertexBuffer to a different number of vertices. (can only resize BEFORE using it to draw)
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
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// Gawain vertex format
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//
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// This code is part of the Gawain library, with modifications
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// specific to integration with Blender.
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//
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// Copyright 2016 Mike Erwin
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of
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// the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
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#pragma once
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#include "common.h"
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#define MAX_VERTEX_ATTRIBS 16
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typedef enum {
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KEEP_FLOAT,
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KEEP_INT,
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NORMALIZE_INT_TO_FLOAT, // 127 (ubyte) -> 0.5 (and so on for other int types)
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CONVERT_INT_TO_FLOAT // 127 (any int type) -> 127.0
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} VertexFetchMode;
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typedef struct {
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GLenum comp_type;
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unsigned comp_ct; // 1 to 4
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unsigned sz; // size in bytes, 1 to 16
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unsigned offset; // from beginning of vertex, in bytes
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VertexFetchMode fetch_mode;
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char* name; // TODO: shared allocation of all names within a VertexFormat
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} Attrib;
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typedef struct {
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unsigned attrib_ct; // 0 to 16 (MAX_VERTEX_ATTRIBS)
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unsigned stride; // stride in bytes, 1 to 256
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bool packed;
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Attrib attribs[MAX_VERTEX_ATTRIBS]; // TODO: variable-size attribs array
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} VertexFormat;
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void VertexFormat_clear(VertexFormat*);
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void VertexFormat_copy(VertexFormat* dest, const VertexFormat* src);
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unsigned add_attrib(VertexFormat*, const char* name, GLenum comp_type, unsigned comp_ct, VertexFetchMode);
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// for internal use
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void VertexFormat_pack(VertexFormat*);
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unsigned padding(unsigned offset, unsigned alignment);
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unsigned vertex_buffer_size(const VertexFormat*, unsigned vertex_ct);
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