diff options
Diffstat (limited to 'intern/gawain/src/gwn_vertex_buffer.c')
| -rw-r--r-- | intern/gawain/src/gwn_vertex_buffer.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/intern/gawain/src/gwn_vertex_buffer.c b/intern/gawain/src/gwn_vertex_buffer.c deleted file mode 100644 index a372c62bd0a..00000000000 --- a/intern/gawain/src/gwn_vertex_buffer.c +++ /dev/null @@ -1,258 +0,0 @@ - -// Gawain vertex 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/. - -#include "gwn_vertex_buffer.h" -#include "gwn_buffer_id.h" -#include "gwn_vertex_format_private.h" -#include <stdlib.h> -#include <string.h> - -#define KEEP_SINGLE_COPY 1 - -static unsigned vbo_memory_usage; - -static GLenum convert_usage_type_to_gl(Gwn_UsageType type) - { - static const GLenum table[] = { - [GWN_USAGE_STREAM] = GL_STREAM_DRAW, - [GWN_USAGE_STATIC] = GL_STATIC_DRAW, - [GWN_USAGE_DYNAMIC] = GL_DYNAMIC_DRAW - }; - return table[type]; - } - -Gwn_VertBuf* GWN_vertbuf_create(Gwn_UsageType usage) - { - Gwn_VertBuf* verts = malloc(sizeof(Gwn_VertBuf)); - GWN_vertbuf_init(verts, usage); - return verts; - } - -Gwn_VertBuf* GWN_vertbuf_create_with_format_ex(const Gwn_VertFormat* format, Gwn_UsageType usage) - { - Gwn_VertBuf* verts = GWN_vertbuf_create(usage); - GWN_vertformat_copy(&verts->format, format); - if (!format->packed) - VertexFormat_pack(&verts->format); - return verts; - - // this function might seem redundant, but there is potential for memory savings here... - // TODO: implement those memory savings - } - -void GWN_vertbuf_init(Gwn_VertBuf* verts, Gwn_UsageType usage) - { - memset(verts, 0, sizeof(Gwn_VertBuf)); - verts->usage = usage; - verts->dirty = true; - } - -void GWN_vertbuf_init_with_format_ex(Gwn_VertBuf* verts, const Gwn_VertFormat* format, Gwn_UsageType usage) - { - GWN_vertbuf_init(verts, usage); - GWN_vertformat_copy(&verts->format, format); - if (!format->packed) - VertexFormat_pack(&verts->format); - } - -void GWN_vertbuf_discard(Gwn_VertBuf* verts) - { - if (verts->vbo_id) - { - GWN_buf_id_free(verts->vbo_id); -#if VRAM_USAGE - vbo_memory_usage -= GWN_vertbuf_size_get(verts); -#endif - } - - if (verts->data) - free(verts->data); - - free(verts); - } - -unsigned GWN_vertbuf_size_get(const Gwn_VertBuf* verts) - { - return vertex_buffer_size(&verts->format, verts->vertex_len); - } - -// create a new allocation, discarding any existing data -void GWN_vertbuf_data_alloc(Gwn_VertBuf* verts, unsigned v_len) - { - Gwn_VertFormat* format = &verts->format; - if (!format->packed) - VertexFormat_pack(format); - -#if TRUST_NO_ONE - // catch any unnecessary use - assert(verts->vertex_alloc != v_len || verts->data == NULL); -#endif - - // only create the buffer the 1st time - if (verts->vbo_id == 0) - verts->vbo_id = GWN_buf_id_alloc(); - - // discard previous data if any - if (verts->data) - free(verts->data); - -#if VRAM_USAGE - unsigned new_size = vertex_buffer_size(&verts->format, v_len); - vbo_memory_usage += new_size - GWN_vertbuf_size_get(verts); -#endif - - verts->dirty = true; - verts->vertex_len = verts->vertex_alloc = v_len; - verts->data = malloc(sizeof(GLubyte) * GWN_vertbuf_size_get(verts)); - } - -// resize buffer keeping existing data -void GWN_vertbuf_data_resize(Gwn_VertBuf* verts, unsigned v_len) - { -#if TRUST_NO_ONE - assert(verts->data != NULL); - assert(verts->vertex_alloc != v_len); -#endif - -#if VRAM_USAGE - unsigned new_size = vertex_buffer_size(&verts->format, v_len); - vbo_memory_usage += new_size - GWN_vertbuf_size_get(verts); -#endif - - verts->dirty = true; - verts->vertex_len = verts->vertex_alloc = v_len; - verts->data = realloc(verts->data, sizeof(GLubyte) * GWN_vertbuf_size_get(verts)); - } - -// set vertex count but does not change allocation -// only this many verts will be uploaded to the GPU and rendered -// this is usefull for streaming data -void GWN_vertbuf_vertex_count_set(Gwn_VertBuf* verts, unsigned v_len) - { -#if TRUST_NO_ONE - assert(verts->data != NULL); // only for dynamic data - assert(v_len <= verts->vertex_alloc); -#endif - -#if VRAM_USAGE - unsigned new_size = vertex_buffer_size(&verts->format, v_len); - vbo_memory_usage += new_size - GWN_vertbuf_size_get(verts); -#endif - - verts->vertex_len = v_len; - } - -void GWN_vertbuf_attr_set(Gwn_VertBuf* verts, unsigned a_idx, unsigned v_idx, const void* data) - { - const Gwn_VertFormat* format = &verts->format; - const Gwn_VertAttr* a = format->attribs + a_idx; - -#if TRUST_NO_ONE - assert(a_idx < format->attr_len); - assert(v_idx < verts->vertex_alloc); - assert(verts->data != NULL); -#endif - - verts->dirty = true; - memcpy((GLubyte*)verts->data + a->offset + v_idx * format->stride, data, a->sz); - } - -void GWN_vertbuf_attr_fill(Gwn_VertBuf* verts, unsigned a_idx, const void* data) - { - const Gwn_VertFormat* format = &verts->format; - const Gwn_VertAttr* a = format->attribs + a_idx; - -#if TRUST_NO_ONE - assert(a_idx < format->attr_len); -#endif - - const unsigned stride = a->sz; // tightly packed input data - - GWN_vertbuf_attr_fill_stride(verts, a_idx, stride, data); - } - -void GWN_vertbuf_attr_fill_stride(Gwn_VertBuf* verts, unsigned a_idx, unsigned stride, const void* data) - { - const Gwn_VertFormat* format = &verts->format; - const Gwn_VertAttr* a = format->attribs + a_idx; - -#if TRUST_NO_ONE - assert(a_idx < format->attr_len); - assert(verts->data != NULL); -#endif - - verts->dirty = true; - const unsigned vertex_len = verts->vertex_len; - - if (format->attr_len == 1 && stride == format->stride) - { - // we can copy it all at once - memcpy(verts->data, data, vertex_len * a->sz); - } - else - { - // we must copy it per vertex - for (unsigned v = 0; v < vertex_len; ++v) - memcpy((GLubyte*)verts->data + a->offset + v * format->stride, (const GLubyte*)data + v * stride, a->sz); - } - } - -void GWN_vertbuf_attr_get_raw_data(Gwn_VertBuf* verts, unsigned a_idx, Gwn_VertBufRaw *access) - { - const Gwn_VertFormat* format = &verts->format; - const Gwn_VertAttr* a = format->attribs + a_idx; - -#if TRUST_NO_ONE - assert(a_idx < format->attr_len); - assert(verts->data != NULL); -#endif - - verts->dirty = true; - - access->size = a->sz; - access->stride = format->stride; - access->data = (GLubyte*)verts->data + a->offset; - access->data_init = access->data; -#if TRUST_NO_ONE - access->_data_end = access->data_init + (size_t)(verts->vertex_alloc * format->stride); -#endif - } - -static void VertBuffer_upload_data(Gwn_VertBuf* verts) - { - unsigned buffer_sz = GWN_vertbuf_size_get(verts); - - // orphan the vbo to avoid sync - glBufferData(GL_ARRAY_BUFFER, buffer_sz, NULL, convert_usage_type_to_gl(verts->usage)); - // upload data - glBufferSubData(GL_ARRAY_BUFFER, 0, buffer_sz, verts->data); - - if (verts->usage == GWN_USAGE_STATIC) - { - free(verts->data); - verts->data = NULL; - } - - verts->dirty = false; - } - -void GWN_vertbuf_use(Gwn_VertBuf* verts) - { - glBindBuffer(GL_ARRAY_BUFFER, verts->vbo_id); - - if (verts->dirty) - VertBuffer_upload_data(verts); - } - -unsigned GWN_vertbuf_get_memory_usage(void) - { - return vbo_memory_usage; - } |