diff options
Diffstat (limited to 'intern/gawain/src/gwn_element.c')
| -rw-r--r-- | intern/gawain/src/gwn_element.c | 265 |
1 files changed, 134 insertions, 131 deletions
diff --git a/intern/gawain/src/gwn_element.c b/intern/gawain/src/gwn_element.c index 257338fe089..a8c99f20860 100644 --- a/intern/gawain/src/gwn_element.c +++ b/intern/gawain/src/gwn_element.c @@ -1,13 +1,33 @@ - -// Gawain element list (AKA index buffer) -// -// This code is part of the Gawain library, with modifications -// specific to integration with Blender. -// -// Copyright 2016 Mike Erwin -// -// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of -// the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/. +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2016 by Mike Erwin. + * All rights reserved. + * + * Contributor(s): Blender Foundation + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/gpu/intern/gwn_element.c + * \ingroup gpu + * + * Gawain element list (AKA index buffer) + */ #include "gwn_element.h" #include "gwn_buffer_id.h" @@ -16,44 +36,45 @@ #define KEEP_SINGLE_COPY 1 static GLenum convert_index_type_to_gl(Gwn_IndexBufType type) - { +{ static const GLenum table[] = { - [GWN_INDEX_U8] = GL_UNSIGNED_BYTE, // GL has this, Vulkan does not + [GWN_INDEX_U8] = GL_UNSIGNED_BYTE, /* GL has this, Vulkan does not */ [GWN_INDEX_U16] = GL_UNSIGNED_SHORT, [GWN_INDEX_U32] = GL_UNSIGNED_INT - }; + }; return table[type]; - } +} -unsigned GWN_indexbuf_size_get(const Gwn_IndexBuf* elem) - { +uint GWN_indexbuf_size_get(const Gwn_IndexBuf* elem) +{ #if GWN_TRACK_INDEX_RANGE - static const unsigned table[] = { - [GWN_INDEX_U8] = sizeof(GLubyte), // GL has this, Vulkan does not + static const uint table[] = { + [GWN_INDEX_U8] = sizeof(GLubyte), /* GL has this, Vulkan does not */ [GWN_INDEX_U16] = sizeof(GLushort), [GWN_INDEX_U32] = sizeof(GLuint) - }; + }; return elem->index_len * table[elem->index_type]; #else return elem->index_len * sizeof(GLuint); #endif - } +} -void GWN_indexbuf_init_ex(Gwn_IndexBufBuilder* builder, Gwn_PrimType prim_type, unsigned index_len, unsigned vertex_len, bool use_prim_restart) - { +void GWN_indexbuf_init_ex( + Gwn_IndexBufBuilder* builder, Gwn_PrimType prim_type, + uint index_len, uint vertex_len, bool use_prim_restart) +{ builder->use_prim_restart = use_prim_restart; builder->max_allowed_index = vertex_len - 1; builder->max_index_len = index_len; builder->index_len = 0; // start empty builder->prim_type = prim_type; - builder->data = calloc(builder->max_index_len, sizeof(unsigned)); - } + builder->data = calloc(builder->max_index_len, sizeof(uint)); +} -void GWN_indexbuf_init(Gwn_IndexBufBuilder* builder, Gwn_PrimType prim_type, unsigned prim_len, unsigned vertex_len) - { - unsigned verts_per_prim = 0; - switch (prim_type) - { +void GWN_indexbuf_init(Gwn_IndexBufBuilder* builder, Gwn_PrimType prim_type, uint prim_len, uint vertex_len) +{ + uint verts_per_prim = 0; + switch (prim_type) { case GWN_PRIM_POINTS: verts_per_prim = 1; break; @@ -71,234 +92,216 @@ void GWN_indexbuf_init(Gwn_IndexBufBuilder* builder, Gwn_PrimType prim_type, uns assert(false); #endif return; - } + } GWN_indexbuf_init_ex(builder, prim_type, prim_len * verts_per_prim, vertex_len, false); - } +} -void GWN_indexbuf_add_generic_vert(Gwn_IndexBufBuilder* builder, unsigned v) - { +void GWN_indexbuf_add_generic_vert(Gwn_IndexBufBuilder* builder, uint v) +{ #if TRUST_NO_ONE assert(builder->data != NULL); assert(builder->index_len < builder->max_index_len); assert(v <= builder->max_allowed_index); #endif - builder->data[builder->index_len++] = v; - } +} void GWN_indexbuf_add_primitive_restart(Gwn_IndexBufBuilder* builder) - { +{ #if TRUST_NO_ONE assert(builder->data != NULL); assert(builder->index_len < builder->max_index_len); assert(builder->use_prim_restart); #endif - builder->data[builder->index_len++] = GWN_PRIM_RESTART; - } +} -void GWN_indexbuf_add_point_vert(Gwn_IndexBufBuilder* builder, unsigned v) - { +void GWN_indexbuf_add_point_vert(Gwn_IndexBufBuilder* builder, uint v) +{ #if TRUST_NO_ONE assert(builder->prim_type == GWN_PRIM_POINTS); #endif - GWN_indexbuf_add_generic_vert(builder, v); - } +} -void GWN_indexbuf_add_line_verts(Gwn_IndexBufBuilder* builder, unsigned v1, unsigned v2) - { +void GWN_indexbuf_add_line_verts(Gwn_IndexBufBuilder* builder, uint v1, uint v2) +{ #if TRUST_NO_ONE assert(builder->prim_type == GWN_PRIM_LINES); assert(v1 != v2); #endif - GWN_indexbuf_add_generic_vert(builder, v1); GWN_indexbuf_add_generic_vert(builder, v2); - } +} -void GWN_indexbuf_add_tri_verts(Gwn_IndexBufBuilder* builder, unsigned v1, unsigned v2, unsigned v3) - { +void GWN_indexbuf_add_tri_verts(Gwn_IndexBufBuilder* builder, uint v1, uint v2, uint v3) +{ #if TRUST_NO_ONE assert(builder->prim_type == GWN_PRIM_TRIS); assert(v1 != v2 && v2 != v3 && v3 != v1); #endif - GWN_indexbuf_add_generic_vert(builder, v1); GWN_indexbuf_add_generic_vert(builder, v2); GWN_indexbuf_add_generic_vert(builder, v3); - } +} -void GWN_indexbuf_add_line_adj_verts(Gwn_IndexBufBuilder* builder, unsigned v1, unsigned v2, unsigned v3, unsigned v4) - { +void GWN_indexbuf_add_line_adj_verts(Gwn_IndexBufBuilder* builder, uint v1, uint v2, uint v3, uint v4) +{ #if TRUST_NO_ONE assert(builder->prim_type == GWN_PRIM_LINES_ADJ); assert(v2 != v3); /* only the line need diff indices */ #endif - GWN_indexbuf_add_generic_vert(builder, v1); GWN_indexbuf_add_generic_vert(builder, v2); GWN_indexbuf_add_generic_vert(builder, v3); GWN_indexbuf_add_generic_vert(builder, v4); - } +} #if GWN_TRACK_INDEX_RANGE -// Everything remains 32 bit while building to keep things simple. -// Find min/max after, then convert to smallest index type possible. +/* Everything remains 32 bit while building to keep things simple. + * Find min/max after, then convert to smallest index type possible. */ -static unsigned index_range(const unsigned values[], unsigned value_len, unsigned* min_out, unsigned* max_out) - { - if (value_len == 0) - { +static uint index_range(const uint values[], uint value_len, uint* min_out, uint* max_out) +{ + if (value_len == 0) { *min_out = 0; *max_out = 0; return 0; - } - unsigned min_value = values[0]; - unsigned max_value = values[0]; - for (unsigned i = 1; i < value_len; ++i) - { - const unsigned value = values[i]; + } + uint min_value = values[0]; + uint max_value = values[0]; + for (uint i = 1; i < value_len; ++i) { + const uint value = values[i]; if (value == GWN_PRIM_RESTART) continue; else if (value < min_value) min_value = value; else if (value > max_value) max_value = value; - } + } *min_out = min_value; *max_out = max_value; return max_value - min_value; - } +} static void squeeze_indices_byte(Gwn_IndexBufBuilder *builder, Gwn_IndexBuf* elem) - { - const unsigned *values = builder->data; - const unsigned index_len = elem->index_len; +{ + const uint *values = builder->data; + const uint index_len = elem->index_len; - // data will never be *larger* than builder->data... - // converting in place to avoid extra allocation + /* data will never be *larger* than builder->data... + * converting in place to avoid extra allocation */ GLubyte *data = (GLubyte *)builder->data; - if (elem->max_index > 0xFF) - { - const unsigned base = elem->min_index; - + if (elem->max_index > 0xFF) { + const uint base = elem->min_index; elem->base_index = base; elem->min_index = 0; elem->max_index -= base; - - for (unsigned i = 0; i < index_len; ++i) + for (uint i = 0; i < index_len; ++i) { data[i] = (values[i] == GWN_PRIM_RESTART) ? 0xFF : (GLubyte)(values[i] - base); } - else - { + } + else { elem->base_index = 0; - - for (unsigned i = 0; i < index_len; ++i) + for (uint i = 0; i < index_len; ++i) { data[i] = (GLubyte)(values[i]); } } +} static void squeeze_indices_short(Gwn_IndexBufBuilder *builder, Gwn_IndexBuf* elem) - { - const unsigned *values = builder->data; - const unsigned index_len = elem->index_len; +{ + const uint *values = builder->data; + const uint index_len = elem->index_len; - // data will never be *larger* than builder->data... - // converting in place to avoid extra allocation + /* data will never be *larger* than builder->data... + * converting in place to avoid extra allocation */ GLushort *data = (GLushort *)builder->data; - if (elem->max_index > 0xFFFF) - { - const unsigned base = elem->min_index; - + if (elem->max_index > 0xFFFF) { + const uint base = elem->min_index; elem->base_index = base; elem->min_index = 0; elem->max_index -= base; - - for (unsigned i = 0; i < index_len; ++i) + for (uint i = 0; i < index_len; ++i) { data[i] = (values[i] == GWN_PRIM_RESTART) ? 0xFFFF : (GLushort)(values[i] - base); } - else - { + } + else { elem->base_index = 0; - - for (unsigned i = 0; i < index_len; ++i) + for (uint i = 0; i < index_len; ++i) { data[i] = (GLushort)(values[i]); } } +} -#endif // GWN_TRACK_INDEX_RANGE +#endif /* GWN_TRACK_INDEX_RANGE */ Gwn_IndexBuf* GWN_indexbuf_build(Gwn_IndexBufBuilder* builder) - { +{ Gwn_IndexBuf* elem = calloc(1, sizeof(Gwn_IndexBuf)); GWN_indexbuf_build_in_place(builder, elem); return elem; - } +} void GWN_indexbuf_build_in_place(Gwn_IndexBufBuilder* builder, Gwn_IndexBuf* elem) - { +{ #if TRUST_NO_ONE assert(builder->data != NULL); #endif - elem->index_len = builder->index_len; elem->use_prim_restart = builder->use_prim_restart; #if GWN_TRACK_INDEX_RANGE - unsigned range = index_range(builder->data, builder->index_len, &elem->min_index, &elem->max_index); + uint range = index_range(builder->data, builder->index_len, &elem->min_index, &elem->max_index); - // count the primitive restart index. - if (elem->use_prim_restart) + /* count the primitive restart index. */ + if (elem->use_prim_restart) { range += 1; + } - if (range <= 0xFF) - { + if (range <= 0xFF) { elem->index_type = GWN_INDEX_U8; squeeze_indices_byte(builder, elem); - } - else if (range <= 0xFFFF) - { + } + else if (range <= 0xFFFF) { elem->index_type = GWN_INDEX_U16; squeeze_indices_short(builder, elem); - } - else - { + } + else { elem->index_type = GWN_INDEX_U32; elem->base_index = 0; - } - + } elem->gl_index_type = convert_index_type_to_gl(elem->index_type); #endif - if (elem->vbo_id == 0) + if (elem->vbo_id == 0) { elem->vbo_id = GWN_buf_id_alloc(); - - // send data to GPU - // GL_ELEMENT_ARRAY_BUFFER changes the state of the last VAO bound, - // so we use the GL_ARRAY_BUFFER here to create a buffer without - // interfering in the VAO state. + } + /* send data to GPU */ + /* GL_ELEMENT_ARRAY_BUFFER changes the state of the last VAO bound, + * so we use the GL_ARRAY_BUFFER here to create a buffer without + * interfering in the VAO state. */ glBindBuffer(GL_ARRAY_BUFFER, elem->vbo_id); glBufferData(GL_ARRAY_BUFFER, GWN_indexbuf_size_get(elem), builder->data, GL_STATIC_DRAW); - // discard builder (one-time use) + /* discard builder (one-time use) */ free(builder->data); builder->data = NULL; - // other fields are safe to leave - } + /* other fields are safe to leave */ +} void GWN_indexbuf_use(Gwn_IndexBuf* elem) - { +{ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elem->vbo_id); - } +} void GWN_indexbuf_discard(Gwn_IndexBuf* elem) - { - if (elem->vbo_id) +{ + if (elem->vbo_id) { GWN_buf_id_free(elem->vbo_id); - - free(elem); } + free(elem); +} |