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blender-archive/source/blender/gpu/intern/gpu_buffers.c

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/*
* ***** 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) 2005 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Brecht Van Lommel.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/gpu/intern/gpu_buffers.c
* \ingroup gpu
*/
#include <limits.h>
#include <stddef.h>
#include <string.h>
#include "GL/glew.h"
#include "MEM_guardedalloc.h"
#include "BLI_bitmap.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BLI_ghash.h"
#include "BLI_threads.h"
#include "DNA_meshdata_types.h"
#include "BKE_ccg.h"
#include "BKE_DerivedMesh.h"
#include "BKE_paint.h"
#include "BKE_subsurf.h"
#include "DNA_userdef_types.h"
#include "GPU_buffers.h"
typedef enum {
GPU_BUFFER_VERTEX_STATE = 1,
GPU_BUFFER_NORMAL_STATE = 2,
GPU_BUFFER_TEXCOORD_STATE = 4,
GPU_BUFFER_COLOR_STATE = 8,
GPU_BUFFER_ELEMENT_STATE = 16,
} GPUBufferState;
#define MAX_GPU_ATTRIB_DATA 32
/* material number is an 16-bit short and the range of short is from -16383 to 16383 (assume material number is non-negative) */
#define MAX_MATERIALS 16384
/* -1 - undefined, 0 - vertex arrays, 1 - VBOs */
static int useVBOs = -1;
static GPUBufferState GLStates = 0;
static GPUAttrib attribData[MAX_GPU_ATTRIB_DATA] = { { -1, 0, 0 } };
/* stores recently-deleted buffers so that new buffers won't have to
* be recreated as often
*
* only one instance of this pool is created, stored in
* gpu_buffer_pool
*
* note that the number of buffers in the pool is usually limited to
* MAX_FREE_GPU_BUFFERS, but this limit may be exceeded temporarily
* when a GPUBuffer is released outside the main thread; due to OpenGL
* restrictions it cannot be immediately released
*/
typedef struct GPUBufferPool {
/* number of allocated buffers stored */
int totbuf;
/* actual allocated length of the array */
int maxsize;
GPUBuffer **buffers;
} GPUBufferPool;
#define MAX_FREE_GPU_BUFFERS 8
/* create a new GPUBufferPool */
static GPUBufferPool *gpu_buffer_pool_new(void)
{
GPUBufferPool *pool;
/* enable VBOs if supported */
if (useVBOs == -1)
useVBOs = (GLEW_ARB_vertex_buffer_object ? 1 : 0);
pool = MEM_callocN(sizeof(GPUBufferPool), "GPUBuffer_Pool");
pool->maxsize = MAX_FREE_GPU_BUFFERS;
pool->buffers = MEM_callocN(sizeof(GPUBuffer *) * pool->maxsize,
"GPUBuffer.buffers");
return pool;
}
/* remove a GPUBuffer from the pool (does not free the GPUBuffer) */
static void gpu_buffer_pool_remove_index(GPUBufferPool *pool, int index)
{
int i;
if (!pool || index < 0 || index >= pool->totbuf)
return;
/* shift entries down, overwriting the buffer at `index' */
for (i = index; i < pool->totbuf - 1; i++)
pool->buffers[i] = pool->buffers[i + 1];
/* clear the last entry */
if (pool->totbuf > 0)
pool->buffers[pool->totbuf - 1] = NULL;
pool->totbuf--;
}
/* delete the last entry in the pool */
static void gpu_buffer_pool_delete_last(GPUBufferPool *pool)
{
GPUBuffer *last;
if (pool->totbuf <= 0)
return;
/* get the last entry */
if (!(last = pool->buffers[pool->totbuf - 1]))
return;
/* delete the buffer's data */
if (useVBOs)
glDeleteBuffersARB(1, &last->id);
else
MEM_freeN(last->pointer);
/* delete the buffer and remove from pool */
MEM_freeN(last);
pool->totbuf--;
pool->buffers[pool->totbuf] = NULL;
}
/* free a GPUBufferPool; also frees the data in the pool's
* GPUBuffers */
static void gpu_buffer_pool_free(GPUBufferPool *pool)
{
if (!pool)
return;
while (pool->totbuf)
gpu_buffer_pool_delete_last(pool);
MEM_freeN(pool->buffers);
MEM_freeN(pool);
}
static GPUBufferPool *gpu_buffer_pool = NULL;
static GPUBufferPool *gpu_get_global_buffer_pool(void)
{
/* initialize the pool */
if (!gpu_buffer_pool)
gpu_buffer_pool = gpu_buffer_pool_new();
return gpu_buffer_pool;
}
void GPU_global_buffer_pool_free(void)
{
gpu_buffer_pool_free(gpu_buffer_pool);
gpu_buffer_pool = NULL;
}
/* get a GPUBuffer of at least `size' bytes; uses one from the buffer
* pool if possible, otherwise creates a new one */
GPUBuffer *GPU_buffer_alloc(int size)
{
GPUBufferPool *pool;
GPUBuffer *buf;
int i, bufsize, bestfit = -1;
/* bad case, leads to leak of buf since buf->pointer will allocate
* NULL, leading to return without cleanup. In any case better detect early
* psy-fi */
if (size == 0)
return NULL;
pool = gpu_get_global_buffer_pool();
/* not sure if this buffer pool code has been profiled much,
* seems to me that the graphics driver and system memory
* management might do this stuff anyway. --nicholas
*/
/* check the global buffer pool for a recently-deleted buffer
* that is at least as big as the request, but not more than
* twice as big */
for (i = 0; i < pool->totbuf; i++) {
bufsize = pool->buffers[i]->size;
/* check for an exact size match */
if (bufsize == size) {
bestfit = i;
break;
}
/* smaller buffers won't fit data and buffers at least
* twice as big are a waste of memory */
else if (bufsize > size && size > (bufsize / 2)) {
/* is it closer to the required size than the
* last appropriate buffer found. try to save
* memory */
if (bestfit == -1 || pool->buffers[bestfit]->size > bufsize) {
bestfit = i;
}
}
}
/* if an acceptable buffer was found in the pool, remove it
* from the pool and return it */
if (bestfit != -1) {
buf = pool->buffers[bestfit];
gpu_buffer_pool_remove_index(pool, bestfit);
return buf;
}
/* no acceptable buffer found in the pool, create a new one */
buf = MEM_callocN(sizeof(GPUBuffer), "GPUBuffer");
buf->size = size;
if (useVBOs == 1) {
/* create a new VBO and initialize it to the requested
* size */
glGenBuffersARB(1, &buf->id);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buf->id);
glBufferDataARB(GL_ARRAY_BUFFER_ARB, size, NULL, GL_STATIC_DRAW_ARB);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
else {
buf->pointer = MEM_mallocN(size, "GPUBuffer.pointer");
/* purpose of this seems to be dealing with
* out-of-memory errors? looks a bit iffy to me
* though, at least on Linux I expect malloc() would
* just overcommit. --nicholas */
while (!buf->pointer && pool->totbuf > 0) {
gpu_buffer_pool_delete_last(pool);
buf->pointer = MEM_mallocN(size, "GPUBuffer.pointer");
}
if (!buf->pointer)
return NULL;
}
return buf;
}
/* release a GPUBuffer; does not free the actual buffer or its data,
* but rather moves it to the pool of recently-freed buffers for
* possible re-use*/
void GPU_buffer_free(GPUBuffer *buffer)
{
GPUBufferPool *pool;
int i;
if (!buffer)
return;
pool = gpu_get_global_buffer_pool();
/* free the last used buffer in the queue if no more space, but only
* if we are in the main thread. for e.g. rendering or baking it can
* happen that we are in other thread and can't call OpenGL, in that
* case cleanup will be done GPU_buffer_pool_free_unused */
if (BLI_thread_is_main()) {
/* in main thread, safe to decrease size of pool back
* down to MAX_FREE_GPU_BUFFERS */
while (pool->totbuf >= MAX_FREE_GPU_BUFFERS)
gpu_buffer_pool_delete_last(pool);
}
else {
/* outside of main thread, can't safely delete the
* buffer, so increase pool size */
if (pool->maxsize == pool->totbuf) {
pool->maxsize += MAX_FREE_GPU_BUFFERS;
pool->buffers = MEM_reallocN(pool->buffers,
sizeof(GPUBuffer *) * pool->maxsize);
}
}
/* shift pool entries up by one */
for (i = pool->totbuf; i > 0; i--)
pool->buffers[i] = pool->buffers[i - 1];
/* insert the buffer into the beginning of the pool */
pool->buffers[0] = buffer;
pool->totbuf++;
}
typedef struct GPUVertPointLink {
struct GPUVertPointLink *next;
/* -1 means uninitialized */
int point_index;
} GPUVertPointLink;
/* add a new point to the list of points related to a particular
* vertex */
static void gpu_drawobject_add_vert_point(GPUDrawObject *gdo, int vert_index, int point_index)
{
GPUVertPointLink *lnk;
lnk = &gdo->vert_points[vert_index];
/* if first link is in use, add a new link at the end */
if (lnk->point_index != -1) {
/* get last link */
for (; lnk->next; lnk = lnk->next) ;
/* add a new link from the pool */
lnk = lnk->next = &gdo->vert_points_mem[gdo->vert_points_usage];
gdo->vert_points_usage++;
}
lnk->point_index = point_index;
}
/* update the vert_points and triangle_to_mface fields with a new
* triangle */
static void gpu_drawobject_add_triangle(GPUDrawObject *gdo,
int base_point_index,
int face_index,
int v1, int v2, int v3)
{
int i, v[3] = {v1, v2, v3};
for (i = 0; i < 3; i++)
gpu_drawobject_add_vert_point(gdo, v[i], base_point_index + i);
gdo->triangle_to_mface[base_point_index / 3] = face_index;
}
/* for each vertex, build a list of points related to it; these lists
* are stored in an array sized to the number of vertices */
static void gpu_drawobject_init_vert_points(GPUDrawObject *gdo, MFace *f, int totface)
{
GPUBufferMaterial *mat;
int i, mat_orig_to_new[MAX_MATERIALS];
/* allocate the array and space for links */
gdo->vert_points = MEM_callocN(sizeof(GPUVertPointLink) * gdo->totvert,
"GPUDrawObject.vert_points");
gdo->vert_points_mem = MEM_callocN(sizeof(GPUVertPointLink) * gdo->tot_triangle_point,
"GPUDrawObject.vert_points_mem");
gdo->vert_points_usage = 0;
/* build a map from the original material indices to the new
* GPUBufferMaterial indices */
for (i = 0; i < gdo->totmaterial; i++)
mat_orig_to_new[gdo->materials[i].mat_nr] = i;
/* -1 indicates the link is not yet used */
for (i = 0; i < gdo->totvert; i++)
gdo->vert_points[i].point_index = -1;
for (i = 0; i < totface; i++, f++) {
mat = &gdo->materials[mat_orig_to_new[f->mat_nr]];
/* add triangle */
gpu_drawobject_add_triangle(gdo, mat->start + mat->totpoint,
i, f->v1, f->v2, f->v3);
mat->totpoint += 3;
/* add second triangle for quads */
if (f->v4) {
gpu_drawobject_add_triangle(gdo, mat->start + mat->totpoint,
i, f->v3, f->v4, f->v1);
mat->totpoint += 3;
}
}
/* map any unused vertices to loose points */
for (i = 0; i < gdo->totvert; i++) {
if (gdo->vert_points[i].point_index == -1) {
gdo->vert_points[i].point_index = gdo->tot_triangle_point + gdo->tot_loose_point;
gdo->tot_loose_point++;
}
}
}
/* see GPUDrawObject's structure definition for a description of the
* data being initialized here */
GPUDrawObject *GPU_drawobject_new(DerivedMesh *dm)
{
GPUDrawObject *gdo;
MFace *mface;
int points_per_mat[MAX_MATERIALS];
int i, curmat, curpoint, totface;
mface = dm->getTessFaceArray(dm);
totface = dm->getNumTessFaces(dm);
/* get the number of points used by each material, treating
* each quad as two triangles */
memset(points_per_mat, 0, sizeof(int) * MAX_MATERIALS);
for (i = 0; i < totface; i++)
points_per_mat[mface[i].mat_nr] += mface[i].v4 ? 6 : 3;
/* create the GPUDrawObject */
gdo = MEM_callocN(sizeof(GPUDrawObject), "GPUDrawObject");
gdo->totvert = dm->getNumVerts(dm);
gdo->totedge = dm->getNumEdges(dm);
/* count the number of materials used by this DerivedMesh */
for (i = 0; i < MAX_MATERIALS; i++) {
if (points_per_mat[i] > 0)
gdo->totmaterial++;
}
/* allocate an array of materials used by this DerivedMesh */
gdo->materials = MEM_mallocN(sizeof(GPUBufferMaterial) * gdo->totmaterial,
"GPUDrawObject.materials");
/* initialize the materials array */
for (i = 0, curmat = 0, curpoint = 0; i < MAX_MATERIALS; i++) {
if (points_per_mat[i] > 0) {
gdo->materials[curmat].start = curpoint;
gdo->materials[curmat].totpoint = 0;
gdo->materials[curmat].mat_nr = i;
curpoint += points_per_mat[i];
curmat++;
}
}
/* store total number of points used for triangles */
gdo->tot_triangle_point = curpoint;
gdo->triangle_to_mface = MEM_mallocN(sizeof(int) * (gdo->tot_triangle_point / 3),
"GPUDrawObject.triangle_to_mface");
gpu_drawobject_init_vert_points(gdo, mface, totface);
return gdo;
}
void GPU_drawobject_free(DerivedMesh *dm)
{
GPUDrawObject *gdo;
if (!dm || !(gdo = dm->drawObject))
return;
MEM_freeN(gdo->materials);
MEM_freeN(gdo->triangle_to_mface);
MEM_freeN(gdo->vert_points);
MEM_freeN(gdo->vert_points_mem);
GPU_buffer_free(gdo->points);
GPU_buffer_free(gdo->normals);
GPU_buffer_free(gdo->uv);
GPU_buffer_free(gdo->colors);
GPU_buffer_free(gdo->edges);
GPU_buffer_free(gdo->uvedges);
MEM_freeN(gdo);
dm->drawObject = NULL;
}
typedef void (*GPUBufferCopyFunc)(DerivedMesh *dm, float *varray, int *index,
int *mat_orig_to_new, void *user_data);
static GPUBuffer *gpu_buffer_setup(DerivedMesh *dm, GPUDrawObject *object,
int vector_size, int size, GLenum target,
void *user, GPUBufferCopyFunc copy_f)
{
GPUBufferPool *pool;
GPUBuffer *buffer;
float *varray;
int mat_orig_to_new[MAX_MATERIALS];
int *cur_index_per_mat;
int i;
int success;
GLboolean uploaded;
pool = gpu_get_global_buffer_pool();
/* alloc a GPUBuffer; fall back to legacy mode on failure */
if (!(buffer = GPU_buffer_alloc(size)))
dm->drawObject->legacy = 1;
/* nothing to do for legacy mode */
if (dm->drawObject->legacy)
return NULL;
cur_index_per_mat = MEM_mallocN(sizeof(int) * object->totmaterial,
"GPU_buffer_setup.cur_index_per_mat");
for (i = 0; i < object->totmaterial; i++) {
/* for each material, the current index to copy data to */
cur_index_per_mat[i] = object->materials[i].start * vector_size;
/* map from original material index to new
* GPUBufferMaterial index */
mat_orig_to_new[object->materials[i].mat_nr] = i;
}
if (useVBOs) {
success = 0;
while (!success) {
/* bind the buffer and discard previous data,
* avoids stalling gpu */
glBindBufferARB(target, buffer->id);
glBufferDataARB(target, buffer->size, NULL, GL_STATIC_DRAW_ARB);
/* attempt to map the buffer */
if (!(varray = glMapBufferARB(target, GL_WRITE_ONLY_ARB))) {
/* failed to map the buffer; delete it */
GPU_buffer_free(buffer);
gpu_buffer_pool_delete_last(pool);
buffer = NULL;
/* try freeing an entry from the pool
* and reallocating the buffer */
if (pool->totbuf > 0) {
gpu_buffer_pool_delete_last(pool);
buffer = GPU_buffer_alloc(size);
}
/* allocation still failed; fall back
* to legacy mode */
if (!buffer) {
dm->drawObject->legacy = 1;
success = 1;
}
}
else {
success = 1;
}
}
/* check legacy fallback didn't happen */
if (dm->drawObject->legacy == 0) {
uploaded = GL_FALSE;
/* attempt to upload the data to the VBO */
while (uploaded == GL_FALSE) {
(*copy_f)(dm, varray, cur_index_per_mat, mat_orig_to_new, user);
/* glUnmapBuffer returns GL_FALSE if
* the data store is corrupted; retry
* in that case */
uploaded = glUnmapBufferARB(target);
}
}
glBindBufferARB(target, 0);
}
else {
/* VBO not supported, use vertex array fallback */
if (buffer->pointer) {
varray = buffer->pointer;
(*copy_f)(dm, varray, cur_index_per_mat, mat_orig_to_new, user);
}
else {
dm->drawObject->legacy = 1;
}
}
MEM_freeN(cur_index_per_mat);
return buffer;
}
static void GPU_buffer_copy_vertex(DerivedMesh *dm, float *varray, int *index, int *mat_orig_to_new, void *UNUSED(user))
{
MVert *mvert;
MFace *f;
int i, j, start, totface;
mvert = dm->getVertArray(dm);
f = dm->getTessFaceArray(dm);
totface = dm->getNumTessFaces(dm);
for (i = 0; i < totface; i++, f++) {
start = index[mat_orig_to_new[f->mat_nr]];
/* v1 v2 v3 */
copy_v3_v3(&varray[start], mvert[f->v1].co);
copy_v3_v3(&varray[start + 3], mvert[f->v2].co);
copy_v3_v3(&varray[start + 6], mvert[f->v3].co);
index[mat_orig_to_new[f->mat_nr]] += 9;
if (f->v4) {
/* v3 v4 v1 */
copy_v3_v3(&varray[start + 9], mvert[f->v3].co);
copy_v3_v3(&varray[start + 12], mvert[f->v4].co);
copy_v3_v3(&varray[start + 15], mvert[f->v1].co);
index[mat_orig_to_new[f->mat_nr]] += 9;
}
}
/* copy loose points */
j = dm->drawObject->tot_triangle_point * 3;
for (i = 0; i < dm->drawObject->totvert; i++) {
if (dm->drawObject->vert_points[i].point_index >= dm->drawObject->tot_triangle_point) {
copy_v3_v3(&varray[j], mvert[i].co);
j += 3;
}
}
}
static void GPU_buffer_copy_normal(DerivedMesh *dm, float *varray, int *index, int *mat_orig_to_new, void *UNUSED(user))
{
int i, totface;
int start;
float f_no[3];
float *nors = dm->getTessFaceDataArray(dm, CD_NORMAL);
MVert *mvert = dm->getVertArray(dm);
MFace *f = dm->getTessFaceArray(dm);
totface = dm->getNumTessFaces(dm);
for (i = 0; i < totface; i++, f++) {
const int smoothnormal = (f->flag & ME_SMOOTH);
start = index[mat_orig_to_new[f->mat_nr]];
index[mat_orig_to_new[f->mat_nr]] += f->v4 ? 18 : 9;
if (smoothnormal) {
/* copy vertex normal */
normal_short_to_float_v3(&varray[start], mvert[f->v1].no);
normal_short_to_float_v3(&varray[start + 3], mvert[f->v2].no);
normal_short_to_float_v3(&varray[start + 6], mvert[f->v3].no);
if (f->v4) {
normal_short_to_float_v3(&varray[start + 9], mvert[f->v3].no);
normal_short_to_float_v3(&varray[start + 12], mvert[f->v4].no);
normal_short_to_float_v3(&varray[start + 15], mvert[f->v1].no);
}
}
else if (nors) {
/* copy cached face normal */
copy_v3_v3(&varray[start], &nors[i * 3]);
copy_v3_v3(&varray[start + 3], &nors[i * 3]);
copy_v3_v3(&varray[start + 6], &nors[i * 3]);
if (f->v4) {
copy_v3_v3(&varray[start + 9], &nors[i * 3]);
copy_v3_v3(&varray[start + 12], &nors[i * 3]);
copy_v3_v3(&varray[start + 15], &nors[i * 3]);
}
}
else {
/* calculate face normal */
if (f->v4)
normal_quad_v3(f_no, mvert[f->v1].co, mvert[f->v2].co, mvert[f->v3].co, mvert[f->v4].co);
else
normal_tri_v3(f_no, mvert[f->v1].co, mvert[f->v2].co, mvert[f->v3].co);
copy_v3_v3(&varray[start], f_no);
copy_v3_v3(&varray[start + 3], f_no);
copy_v3_v3(&varray[start + 6], f_no);
if (f->v4) {
copy_v3_v3(&varray[start + 9], f_no);
copy_v3_v3(&varray[start + 12], f_no);
copy_v3_v3(&varray[start + 15], f_no);
}
}
}
}
static void GPU_buffer_copy_uv(DerivedMesh *dm, float *varray, int *index, int *mat_orig_to_new, void *UNUSED(user))
{
int start;
int i, totface;
MTFace *mtface;
MFace *f;
if (!(mtface = DM_get_tessface_data_layer(dm, CD_MTFACE)))
return;
f = dm->getTessFaceArray(dm);
totface = dm->getNumTessFaces(dm);
for (i = 0; i < totface; i++, f++) {
start = index[mat_orig_to_new[f->mat_nr]];
/* v1 v2 v3 */
copy_v2_v2(&varray[start], mtface[i].uv[0]);
copy_v2_v2(&varray[start + 2], mtface[i].uv[1]);
copy_v2_v2(&varray[start + 4], mtface[i].uv[2]);
index[mat_orig_to_new[f->mat_nr]] += 6;
if (f->v4) {
/* v3 v4 v1 */
copy_v2_v2(&varray[start + 6], mtface[i].uv[2]);
copy_v2_v2(&varray[start + 8], mtface[i].uv[3]);
copy_v2_v2(&varray[start + 10], mtface[i].uv[0]);
index[mat_orig_to_new[f->mat_nr]] += 6;
}
}
}
static void GPU_buffer_copy_color3(DerivedMesh *dm, float *varray_, int *index, int *mat_orig_to_new, void *user)
{
int i, totface;
char *varray = (char *)varray_;
char *mcol = (char *)user;
MFace *f = dm->getTessFaceArray(dm);
totface = dm->getNumTessFaces(dm);
for (i = 0; i < totface; i++, f++) {
int start = index[mat_orig_to_new[f->mat_nr]];
/* v1 v2 v3 */
copy_v3_v3_char(&varray[start], &mcol[i * 12]);
copy_v3_v3_char(&varray[start + 3], &mcol[i * 12 + 3]);
copy_v3_v3_char(&varray[start + 6], &mcol[i * 12 + 6]);
index[mat_orig_to_new[f->mat_nr]] += 9;
if (f->v4) {
/* v3 v4 v1 */
copy_v3_v3_char(&varray[start + 9], &mcol[i * 12 + 6]);
copy_v3_v3_char(&varray[start + 12], &mcol[i * 12 + 9]);
copy_v3_v3_char(&varray[start + 15], &mcol[i * 12]);
index[mat_orig_to_new[f->mat_nr]] += 9;
}
}
}
static void copy_mcol_uc3(unsigned char *v, unsigned char *col)
{
v[0] = col[3];
v[1] = col[2];
v[2] = col[1];
}
/* treat varray_ as an array of MCol, four MCol's per face */
static void GPU_buffer_copy_mcol(DerivedMesh *dm, float *varray_, int *index, int *mat_orig_to_new, void *user)
{
int i, totface;
unsigned char *varray = (unsigned char *)varray_;
unsigned char *mcol = (unsigned char *)user;
MFace *f = dm->getTessFaceArray(dm);
totface = dm->getNumTessFaces(dm);
for (i = 0; i < totface; i++, f++) {
int start = index[mat_orig_to_new[f->mat_nr]];
/* v1 v2 v3 */
copy_mcol_uc3(&varray[start], &mcol[i * 16]);
copy_mcol_uc3(&varray[start + 3], &mcol[i * 16 + 4]);
copy_mcol_uc3(&varray[start + 6], &mcol[i * 16 + 8]);
index[mat_orig_to_new[f->mat_nr]] += 9;
if (f->v4) {
/* v3 v4 v1 */
copy_mcol_uc3(&varray[start + 9], &mcol[i * 16 + 8]);
copy_mcol_uc3(&varray[start + 12], &mcol[i * 16 + 12]);
copy_mcol_uc3(&varray[start + 15], &mcol[i * 16]);
index[mat_orig_to_new[f->mat_nr]] += 9;
}
}
}
static void GPU_buffer_copy_edge(DerivedMesh *dm, float *varray_, int *UNUSED(index), int *UNUSED(mat_orig_to_new), void *UNUSED(user))
{
MEdge *medge;
unsigned int *varray = (unsigned int *)varray_;
int i, totedge;
medge = dm->getEdgeArray(dm);
totedge = dm->getNumEdges(dm);
for (i = 0; i < totedge; i++, medge++) {
varray[i * 2] = dm->drawObject->vert_points[medge->v1].point_index;
varray[i * 2 + 1] = dm->drawObject->vert_points[medge->v2].point_index;
}
}
static void GPU_buffer_copy_uvedge(DerivedMesh *dm, float *varray, int *UNUSED(index), int *UNUSED(mat_orig_to_new), void *UNUSED(user))
{
MTFace *tf = DM_get_tessface_data_layer(dm, CD_MTFACE);
int i, j = 0;
if (!tf)
return;
for (i = 0; i < dm->numTessFaceData; i++, tf++) {
MFace mf;
dm->getTessFace(dm, i, &mf);
copy_v2_v2(&varray[j], tf->uv[0]);
copy_v2_v2(&varray[j + 2], tf->uv[1]);
copy_v2_v2(&varray[j + 4], tf->uv[1]);
copy_v2_v2(&varray[j + 6], tf->uv[2]);
if (!mf.v4) {
copy_v2_v2(&varray[j + 8], tf->uv[2]);
copy_v2_v2(&varray[j + 10], tf->uv[0]);
j += 12;
}
else {
copy_v2_v2(&varray[j + 8], tf->uv[2]);
copy_v2_v2(&varray[j + 10], tf->uv[3]);
copy_v2_v2(&varray[j + 12], tf->uv[3]);
copy_v2_v2(&varray[j + 14], tf->uv[0]);
j += 16;
}
}
}
/* get the DerivedMesh's MCols; choose (in decreasing order of
* preference) from CD_ID_MCOL, CD_PREVIEW_MCOL, or CD_MCOL */
static MCol *gpu_buffer_color_type(DerivedMesh *dm)
{
MCol *c;
int type;
type = CD_ID_MCOL;
c = DM_get_tessface_data_layer(dm, type);
if (!c) {
type = CD_PREVIEW_MCOL;
c = DM_get_tessface_data_layer(dm, type);
if (!c) {
type = CD_MCOL;
c = DM_get_tessface_data_layer(dm, type);
}
}
dm->drawObject->colType = type;
return c;
}
typedef enum {
GPU_BUFFER_VERTEX = 0,
GPU_BUFFER_NORMAL,
GPU_BUFFER_COLOR,
GPU_BUFFER_UV,
GPU_BUFFER_EDGE,
GPU_BUFFER_UVEDGE,
} GPUBufferType;
typedef struct {
GPUBufferCopyFunc copy;
GLenum gl_buffer_type;
int vector_size;
} GPUBufferTypeSettings;
const GPUBufferTypeSettings gpu_buffer_type_settings[] = {
{GPU_buffer_copy_vertex, GL_ARRAY_BUFFER_ARB, 3},
{GPU_buffer_copy_normal, GL_ARRAY_BUFFER_ARB, 3},
{GPU_buffer_copy_mcol, GL_ARRAY_BUFFER_ARB, 3},
{GPU_buffer_copy_uv, GL_ARRAY_BUFFER_ARB, 2},
{GPU_buffer_copy_edge, GL_ELEMENT_ARRAY_BUFFER_ARB, 2},
{GPU_buffer_copy_uvedge, GL_ELEMENT_ARRAY_BUFFER_ARB, 4}
};
/* get the GPUDrawObject buffer associated with a type */
static GPUBuffer **gpu_drawobject_buffer_from_type(GPUDrawObject *gdo, GPUBufferType type)
{
switch (type) {
case GPU_BUFFER_VERTEX:
return &gdo->points;
case GPU_BUFFER_NORMAL:
return &gdo->normals;
case GPU_BUFFER_COLOR:
return &gdo->colors;
case GPU_BUFFER_UV:
return &gdo->uv;
case GPU_BUFFER_EDGE:
return &gdo->edges;
case GPU_BUFFER_UVEDGE:
return &gdo->uvedges;
default:
return NULL;
}
}
/* get the amount of space to allocate for a buffer of a particular type */
static int gpu_buffer_size_from_type(DerivedMesh *dm, GPUBufferType type)
{
switch (type) {
case GPU_BUFFER_VERTEX:
return sizeof(float) * 3 * (dm->drawObject->tot_triangle_point + dm->drawObject->tot_loose_point);
case GPU_BUFFER_NORMAL:
return sizeof(float) * 3 * dm->drawObject->tot_triangle_point;
case GPU_BUFFER_COLOR:
return sizeof(char) * 3 * dm->drawObject->tot_triangle_point;
case GPU_BUFFER_UV:
return sizeof(float) * 2 * dm->drawObject->tot_triangle_point;
case GPU_BUFFER_EDGE:
return sizeof(int) * 2 * dm->drawObject->totedge;
case GPU_BUFFER_UVEDGE:
/* each face gets 3 points, 3 edges per triangle, and
* each edge has its own, non-shared coords, so each
* tri corner needs minimum of 4 floats, quads used
* less so here we can over allocate and assume all
* tris. */
return sizeof(float) * 4 * dm->drawObject->tot_triangle_point;
default:
return -1;
}
}
/* call gpu_buffer_setup with settings for a particular type of buffer */
static GPUBuffer *gpu_buffer_setup_type(DerivedMesh *dm, GPUBufferType type)
{
const GPUBufferTypeSettings *ts;
void *user_data = NULL;
GPUBuffer *buf;
ts = &gpu_buffer_type_settings[type];
/* special handling for MCol and UV buffers */
if (type == GPU_BUFFER_COLOR) {
if (!(user_data = gpu_buffer_color_type(dm)))
return NULL;
}
else if (type == GPU_BUFFER_UV) {
if (!DM_get_tessface_data_layer(dm, CD_MTFACE))
return NULL;
}
buf = gpu_buffer_setup(dm, dm->drawObject, ts->vector_size,
gpu_buffer_size_from_type(dm, type),
ts->gl_buffer_type, user_data, ts->copy);
return buf;
}
/* get the buffer of `type', initializing the GPUDrawObject and
* buffer if needed */
static GPUBuffer *gpu_buffer_setup_common(DerivedMesh *dm, GPUBufferType type)
{
GPUBuffer **buf;
if (!dm->drawObject)
dm->drawObject = GPU_drawobject_new(dm);
buf = gpu_drawobject_buffer_from_type(dm->drawObject, type);
if (!(*buf))
*buf = gpu_buffer_setup_type(dm, type);
return *buf;
}
void GPU_vertex_setup(DerivedMesh *dm)
{
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_VERTEX))
return;
glEnableClientState(GL_VERTEX_ARRAY);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dm->drawObject->points->id);
glVertexPointer(3, GL_FLOAT, 0, 0);
}
else {
glVertexPointer(3, GL_FLOAT, 0, dm->drawObject->points->pointer);
}
GLStates |= GPU_BUFFER_VERTEX_STATE;
}
void GPU_normal_setup(DerivedMesh *dm)
{
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_NORMAL))
return;
glEnableClientState(GL_NORMAL_ARRAY);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dm->drawObject->normals->id);
glNormalPointer(GL_FLOAT, 0, 0);
}
else {
glNormalPointer(GL_FLOAT, 0, dm->drawObject->normals->pointer);
}
GLStates |= GPU_BUFFER_NORMAL_STATE;
}
void GPU_uv_setup(DerivedMesh *dm)
{
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_UV))
return;
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dm->drawObject->uv->id);
glTexCoordPointer(2, GL_FLOAT, 0, 0);
}
else {
glTexCoordPointer(2, GL_FLOAT, 0, dm->drawObject->uv->pointer);
}
GLStates |= GPU_BUFFER_TEXCOORD_STATE;
}
void GPU_color_setup(DerivedMesh *dm)
{
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_COLOR))
return;
glEnableClientState(GL_COLOR_ARRAY);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dm->drawObject->colors->id);
glColorPointer(3, GL_UNSIGNED_BYTE, 0, 0);
}
else {
glColorPointer(3, GL_UNSIGNED_BYTE, 0, dm->drawObject->colors->pointer);
}
GLStates |= GPU_BUFFER_COLOR_STATE;
}
void GPU_edge_setup(DerivedMesh *dm)
{
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_EDGE))
return;
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_VERTEX))
return;
glEnableClientState(GL_VERTEX_ARRAY);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dm->drawObject->points->id);
glVertexPointer(3, GL_FLOAT, 0, 0);
}
else {
glVertexPointer(3, GL_FLOAT, 0, dm->drawObject->points->pointer);
}
GLStates |= GPU_BUFFER_VERTEX_STATE;
if (useVBOs)
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, dm->drawObject->edges->id);
GLStates |= GPU_BUFFER_ELEMENT_STATE;
}
void GPU_uvedge_setup(DerivedMesh *dm)
{
if (!gpu_buffer_setup_common(dm, GPU_BUFFER_UVEDGE))
return;
glEnableClientState(GL_VERTEX_ARRAY);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dm->drawObject->uvedges->id);
glVertexPointer(2, GL_FLOAT, 0, 0);
}
else {
glVertexPointer(2, GL_FLOAT, 0, dm->drawObject->uvedges->pointer);
}
GLStates |= GPU_BUFFER_VERTEX_STATE;
}
static int GPU_typesize(int type)
{
switch (type) {
case GL_FLOAT:
return sizeof(float);
case GL_INT:
return sizeof(int);
case GL_UNSIGNED_INT:
return sizeof(unsigned int);
case GL_BYTE:
return sizeof(char);
case GL_UNSIGNED_BYTE:
return sizeof(unsigned char);
default:
return 0;
}
}
int GPU_attrib_element_size(GPUAttrib data[], int numdata)
{
int i, elementsize = 0;
for (i = 0; i < numdata; i++) {
int typesize = GPU_typesize(data[i].type);
if (typesize != 0)
elementsize += typesize * data[i].size;
}
return elementsize;
}
void GPU_interleaved_attrib_setup(GPUBuffer *buffer, GPUAttrib data[], int numdata)
{
int i;
int elementsize;
intptr_t offset = 0;
for (i = 0; i < MAX_GPU_ATTRIB_DATA; i++) {
if (attribData[i].index != -1) {
glDisableVertexAttribArrayARB(attribData[i].index);
}
else
break;
}
elementsize = GPU_attrib_element_size(data, numdata);
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffer->id);
for (i = 0; i < numdata; i++) {
glEnableVertexAttribArrayARB(data[i].index);
glVertexAttribPointerARB(data[i].index, data[i].size, data[i].type,
GL_FALSE, elementsize, (void *)offset);
offset += data[i].size * GPU_typesize(data[i].type);
attribData[i].index = data[i].index;
attribData[i].size = data[i].size;
attribData[i].type = data[i].type;
}
attribData[numdata].index = -1;
}
else {
for (i = 0; i < numdata; i++) {
glEnableVertexAttribArrayARB(data[i].index);
glVertexAttribPointerARB(data[i].index, data[i].size, data[i].type,
GL_FALSE, elementsize, (char *)buffer->pointer + offset);
offset += data[i].size * GPU_typesize(data[i].type);
}
}
}
void GPU_buffer_unbind(void)
{
int i;
if (GLStates & GPU_BUFFER_VERTEX_STATE)
glDisableClientState(GL_VERTEX_ARRAY);
if (GLStates & GPU_BUFFER_NORMAL_STATE)
glDisableClientState(GL_NORMAL_ARRAY);
if (GLStates & GPU_BUFFER_TEXCOORD_STATE)
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
if (GLStates & GPU_BUFFER_COLOR_STATE)
glDisableClientState(GL_COLOR_ARRAY);
if (GLStates & GPU_BUFFER_ELEMENT_STATE) {
if (useVBOs) {
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
}
GLStates &= !(GPU_BUFFER_VERTEX_STATE | GPU_BUFFER_NORMAL_STATE |
GPU_BUFFER_TEXCOORD_STATE | GPU_BUFFER_COLOR_STATE |
GPU_BUFFER_ELEMENT_STATE);
for (i = 0; i < MAX_GPU_ATTRIB_DATA; i++) {
if (attribData[i].index != -1) {
glDisableVertexAttribArrayARB(attribData[i].index);
}
else
break;
}
if (useVBOs)
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
/* confusion: code in cdderivedmesh calls both GPU_color_setup and
* GPU_color3_upload; both of these set the `colors' buffer, so seems
* like it will just needlessly overwrite? --nicholas */
void GPU_color3_upload(DerivedMesh *dm, unsigned char *data)
{
if (dm->drawObject == 0)
dm->drawObject = GPU_drawobject_new(dm);
GPU_buffer_free(dm->drawObject->colors);
dm->drawObject->colors = gpu_buffer_setup(dm, dm->drawObject, 3,
sizeof(char) * 3 * dm->drawObject->tot_triangle_point,
GL_ARRAY_BUFFER_ARB, data, GPU_buffer_copy_color3);
}
void GPU_color_switch(int mode)
{
if (mode) {
if (!(GLStates & GPU_BUFFER_COLOR_STATE))
glEnableClientState(GL_COLOR_ARRAY);
GLStates |= GPU_BUFFER_COLOR_STATE;
}
else {
if (GLStates & GPU_BUFFER_COLOR_STATE)
glDisableClientState(GL_COLOR_ARRAY);
GLStates &= (!GPU_BUFFER_COLOR_STATE);
}
}
/* return 1 if drawing should be done using old immediate-mode
* code, 0 otherwise */
int GPU_buffer_legacy(DerivedMesh *dm)
{
int test = (U.gameflags & USER_DISABLE_VBO);
if (test)
return 1;
if (dm->drawObject == 0)
dm->drawObject = GPU_drawobject_new(dm);
return dm->drawObject->legacy;
}
void *GPU_buffer_lock(GPUBuffer *buffer)
{
float *varray;
if (!buffer)
return 0;
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffer->id);
varray = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
return varray;
}
else {
return buffer->pointer;
}
}
void *GPU_buffer_lock_stream(GPUBuffer *buffer)
{
float *varray;
if (!buffer)
return 0;
if (useVBOs) {
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffer->id);
/* discard previous data, avoid stalling gpu */
glBufferDataARB(GL_ARRAY_BUFFER_ARB, buffer->size, 0, GL_STREAM_DRAW_ARB);
varray = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
return varray;
}
else {
return buffer->pointer;
}
}
void GPU_buffer_unlock(GPUBuffer *buffer)
{
if (useVBOs) {
if (buffer) {
/* note: this operation can fail, could return
* an error code from this function? */
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
}
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
}
/* used for drawing edges */
void GPU_buffer_draw_elements(GPUBuffer *elements, unsigned int mode, int start, int count)
{
glDrawElements(mode, count, GL_UNSIGNED_INT,
(useVBOs ?
(void *)(start * sizeof(unsigned int)) :
((int *)elements->pointer) + start));
}
/* XXX: the rest of the code in this file is used for optimized PBVH
* drawing and doesn't interact at all with the buffer code above */
/* Convenience struct for building the VBO. */
typedef struct {
float co[3];
short no[3];
/* inserting this to align the 'color' field to a four-byte
* boundary; drastically increases viewport performance on my
* drivers (Gallium/Radeon) --nicholasbishop */
char pad[2];
unsigned char color[3];
} VertexBufferFormat;
struct GPU_Buffers {
/* opengl buffer handles */
GLuint vert_buf, index_buf;
GLenum index_type;
/* mesh pointers in case buffer allocation fails */
MFace *mface;
MVert *mvert;
int *face_indices;
int totface;
const float *vmask;
/* grid pointers */
CCGKey gridkey;
CCGElem **grids;
const DMFlagMat *grid_flag_mats;
const BLI_bitmap *grid_hidden;
int *grid_indices;
int totgrid;
int has_hidden;
unsigned int tot_tri, tot_quad;
};
typedef enum {
VBO_ENABLED,
VBO_DISABLED
} VBO_State;
static void gpu_colors_enable(VBO_State vbo_state)
{
glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
glEnable(GL_COLOR_MATERIAL);
if (vbo_state == VBO_ENABLED)
glEnableClientState(GL_COLOR_ARRAY);
}
static void gpu_colors_disable(VBO_State vbo_state)
{
glDisable(GL_COLOR_MATERIAL);
if (vbo_state == VBO_ENABLED)
glDisableClientState(GL_COLOR_ARRAY);
}
static float gpu_color_from_mask(float mask)
{
return (1.0f - mask) * 0.5f + 0.25f;
}
static void gpu_color_from_mask_copy(float mask, unsigned char out[3])
{
unsigned char color;
color = gpu_color_from_mask(mask) * 255.0f;
out[0] = color;
out[1] = color;
out[2] = color;
}
static void gpu_color_from_mask_set(float mask)
{
float color = gpu_color_from_mask(mask);
glColor3f(color, color, color);
}
static float gpu_color_from_mask_quad(const CCGKey *key,
CCGElem *a, CCGElem *b,
CCGElem *c, CCGElem *d)
{
return gpu_color_from_mask((*CCG_elem_mask(key, a) +
*CCG_elem_mask(key, b) +
*CCG_elem_mask(key, c) +
*CCG_elem_mask(key, d)) * 0.25f);
}
static void gpu_color_from_mask_quad_copy(const CCGKey *key,
CCGElem *a, CCGElem *b,
CCGElem *c, CCGElem *d,
unsigned char out[3])
{
unsigned char color =
gpu_color_from_mask((*CCG_elem_mask(key, a) +
*CCG_elem_mask(key, b) +
*CCG_elem_mask(key, c) +
*CCG_elem_mask(key, d)) * 0.25f) * 255.0f;
out[0] = color;
out[1] = color;
out[2] = color;
}
static void gpu_color_from_mask_quad_set(const CCGKey *key,
CCGElem *a, CCGElem *b,
CCGElem *c, CCGElem *d)
{
float color = gpu_color_from_mask_quad(key, a, b, c, d);
glColor3f(color, color, color);
}
void GPU_update_mesh_buffers(GPU_Buffers *buffers, MVert *mvert,
int *vert_indices, int totvert, const float *vmask)
{
VertexBufferFormat *vert_data;
int i;
buffers->vmask = vmask;
if (buffers->vert_buf) {
/* Build VBO */
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,
sizeof(VertexBufferFormat) * totvert,
NULL, GL_STATIC_DRAW_ARB);
vert_data = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if (vert_data) {
for (i = 0; i < totvert; ++i) {
MVert *v = mvert + vert_indices[i];
VertexBufferFormat *out = vert_data + i;
copy_v3_v3(out->co, v->co);
memcpy(out->no, v->no, sizeof(short) * 3);
gpu_color_from_mask_copy(vmask[vert_indices[i]],
out->color);
}
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
}
else {
glDeleteBuffersARB(1, &buffers->vert_buf);
buffers->vert_buf = 0;
}
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
buffers->mvert = mvert;
}
GPU_Buffers *GPU_build_mesh_buffers(int (*face_vert_indices)[4],
MFace *mface, MVert *mvert,
int *face_indices,
int totface)
{
GPU_Buffers *buffers;
unsigned short *tri_data;
int i, j, k, tottri;
buffers = MEM_callocN(sizeof(GPU_Buffers), "GPU_Buffers");
buffers->index_type = GL_UNSIGNED_SHORT;
/* Count the number of visible triangles */
for (i = 0, tottri = 0; i < totface; ++i) {
const MFace *f = &mface[face_indices[i]];
if (!paint_is_face_hidden(f, mvert))
tottri += f->v4 ? 2 : 1;
}
if (GLEW_ARB_vertex_buffer_object && !(U.gameflags & USER_DISABLE_VBO))
glGenBuffersARB(1, &buffers->index_buf);
if (buffers->index_buf) {
/* Generate index buffer object */
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, buffers->index_buf);
glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
sizeof(unsigned short) * tottri * 3, NULL, GL_STATIC_DRAW_ARB);
/* Fill the triangle buffer */
tri_data = glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if (tri_data) {
for (i = 0; i < totface; ++i) {
const MFace *f = mface + face_indices[i];
int v[3];
/* Skip hidden faces */
if (paint_is_face_hidden(f, mvert))
continue;
v[0] = 0;
v[1] = 1;
v[2] = 2;
for (j = 0; j < (f->v4 ? 2 : 1); ++j) {
for (k = 0; k < 3; ++k) {
*tri_data = face_vert_indices[i][v[k]];
tri_data++;
}
v[0] = 3;
v[1] = 0;
v[2] = 2;
}
}
glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB);
}
else {
glDeleteBuffersARB(1, &buffers->index_buf);
buffers->index_buf = 0;
}
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
if (buffers->index_buf)
glGenBuffersARB(1, &buffers->vert_buf);
buffers->tot_tri = tottri;
buffers->mface = mface;
buffers->face_indices = face_indices;
buffers->totface = totface;
return buffers;
}
void GPU_update_grid_buffers(GPU_Buffers *buffers, CCGElem **grids,
const DMFlagMat *grid_flag_mats, int *grid_indices,
int totgrid, const CCGKey *key)
{
VertexBufferFormat *vert_data;
int i, j, k, x, y;
/* Build VBO */
if (buffers->vert_buf) {
int totvert = key->grid_area * totgrid;
int smooth = grid_flag_mats[grid_indices[0]].flag & ME_SMOOTH;
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,
sizeof(VertexBufferFormat) * totvert,
NULL, GL_STATIC_DRAW_ARB);
vert_data = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if (vert_data) {
for (i = 0; i < totgrid; ++i) {
VertexBufferFormat *vd = vert_data;
CCGElem *grid = grids[grid_indices[i]];
for (y = 0; y < key->grid_size; y++) {
for (x = 0; x < key->grid_size; x++) {
CCGElem *elem = CCG_grid_elem(key, grid, x, y);
copy_v3_v3(vd->co, CCG_elem_co(key, elem));
if (smooth) {
normal_float_to_short_v3(vd->no,
CCG_elem_no(key, elem));
gpu_color_from_mask_copy(*CCG_elem_mask(key, elem),
vd->color);
}
vd++;
}
}
if (!smooth) {
/* for flat shading, recalc normals and set the last vertex of
* each quad in the index buffer to have the flat normal as
* that is what opengl will use */
for (j = 0; j < key->grid_size - 1; j++) {
for (k = 0; k < key->grid_size - 1; k++) {
CCGElem *elems[4] = {
CCG_grid_elem(key, grid, k, j + 1),
CCG_grid_elem(key, grid, k + 1, j + 1),
CCG_grid_elem(key, grid, k + 1, j),
CCG_grid_elem(key, grid, k, j)
};
float fno[3];
normal_quad_v3(fno,
CCG_elem_co(key, elems[0]),
CCG_elem_co(key, elems[1]),
CCG_elem_co(key, elems[2]),
CCG_elem_co(key, elems[3]));
vd = vert_data + (j + 1) * key->grid_size + (k + 1);
normal_float_to_short_v3(vd->no, fno);
gpu_color_from_mask_quad_copy(key,
elems[0],
elems[1],
elems[2],
elems[3],
vd->color);
}
}
}
vert_data += key->grid_area;
}
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
}
else {
glDeleteBuffersARB(1, &buffers->vert_buf);
buffers->vert_buf = 0;
}
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
buffers->grids = grids;
buffers->grid_indices = grid_indices;
buffers->totgrid = totgrid;
buffers->grid_flag_mats = grid_flag_mats;
buffers->gridkey = *key;
//printf("node updated %p\n", buffers);
}
/* Returns the number of visible quads in the nodes' grids. */
static int gpu_count_grid_quads(BLI_bitmap *grid_hidden,
int *grid_indices, int totgrid,
int gridsize)
{
int gridarea = (gridsize - 1) * (gridsize - 1);
int i, x, y, totquad;
/* grid hidden layer is present, so have to check each grid for
* visiblity */
for (i = 0, totquad = 0; i < totgrid; i++) {
const BLI_bitmap gh = grid_hidden[grid_indices[i]];
if (gh) {
/* grid hidden are present, have to check each element */
for (y = 0; y < gridsize - 1; y++) {
for (x = 0; x < gridsize - 1; x++) {
if (!paint_is_grid_face_hidden(gh, gridsize, x, y))
totquad++;
}
}
}
else
totquad += gridarea;
}
return totquad;
}
/* Build the element array buffer of grid indices using either
* unsigned shorts or unsigned ints. */
#define FILL_QUAD_BUFFER(type_, tot_quad_, buffer_) \
{ \
type_ *quad_data; \
int offset = 0; \
int i, j, k; \
\
glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, \
sizeof(type_) * (tot_quad_) * 4, NULL, \
GL_STATIC_DRAW_ARB); \
\
/* Fill the quad buffer */ \
quad_data = glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, \
GL_WRITE_ONLY_ARB); \
if (quad_data) { \
for (i = 0; i < totgrid; ++i) { \
BLI_bitmap gh = NULL; \
if (grid_hidden) \
gh = grid_hidden[(grid_indices)[i]]; \
\
for (j = 0; j < gridsize - 1; ++j) { \
for (k = 0; k < gridsize - 1; ++k) { \
/* Skip hidden grid face */ \
if (gh && \
paint_is_grid_face_hidden(gh, \
gridsize, k, j)) \
continue; \
\
*(quad_data++) = offset + j * gridsize + k + 1; \
*(quad_data++) = offset + j * gridsize + k; \
*(quad_data++) = offset + (j + 1) * gridsize + k; \
*(quad_data++) = offset + (j + 1) * gridsize + k + 1; \
} \
} \
\
offset += gridsize * gridsize; \
} \
glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB); \
} \
else { \
glDeleteBuffersARB(1, &(buffer_)); \
(buffer_) = 0; \
} \
} (void)0
/* end FILL_QUAD_BUFFER */
static GLuint gpu_get_grid_buffer(int gridsize, GLenum *index_type, unsigned *totquad)
{
static int prev_gridsize = -1;
static GLenum prev_index_type = 0;
static GLuint buffer = 0;
static unsigned prev_totquad;
/* used in the FILL_QUAD_BUFFER macro */
const BLI_bitmap *grid_hidden = NULL;
int *grid_indices = NULL;
int totgrid = 1;
/* VBO is disabled; delete the previous buffer (if it exists) and
* return an invalid handle */
if (!GLEW_ARB_vertex_buffer_object || (U.gameflags & USER_DISABLE_VBO)) {
if (buffer)
glDeleteBuffersARB(1, &buffer);
return 0;
}
/* VBO is already built */
if (buffer && prev_gridsize == gridsize) {
*index_type = prev_index_type;
*totquad = prev_totquad;
return buffer;
}
/* Build new VBO */
glGenBuffersARB(1, &buffer);
if (buffer) {
*totquad = (gridsize - 1) * (gridsize - 1);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, buffer);
if (gridsize * gridsize < USHRT_MAX) {
*index_type = GL_UNSIGNED_SHORT;
FILL_QUAD_BUFFER(unsigned short, *totquad, buffer);
}
else {
*index_type = GL_UNSIGNED_INT;
FILL_QUAD_BUFFER(unsigned int, *totquad, buffer);
}
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
prev_gridsize = gridsize;
prev_index_type = *index_type;
prev_totquad = *totquad;
return buffer;
}
GPU_Buffers *GPU_build_grid_buffers(int *grid_indices, int totgrid,
BLI_bitmap *grid_hidden, int gridsize)
{
GPU_Buffers *buffers;
int totquad;
int fully_visible_totquad = (gridsize - 1) * (gridsize - 1) * totgrid;
buffers = MEM_callocN(sizeof(GPU_Buffers), "GPU_Buffers");
buffers->grid_hidden = grid_hidden;
buffers->totgrid = totgrid;
/* Count the number of quads */
totquad = gpu_count_grid_quads(grid_hidden, grid_indices, totgrid, gridsize);
if (totquad == fully_visible_totquad) {
buffers->index_buf = gpu_get_grid_buffer(gridsize, &buffers->index_type, &buffers->tot_quad);
buffers->has_hidden = 0;
}
else if (GLEW_ARB_vertex_buffer_object && !(U.gameflags & USER_DISABLE_VBO)) {
/* Build new VBO */
glGenBuffersARB(1, &buffers->index_buf);
if (buffers->index_buf) {
buffers->tot_quad = totquad;
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, buffers->index_buf);
if (totgrid * gridsize * gridsize < USHRT_MAX) {
buffers->index_type = GL_UNSIGNED_SHORT;
FILL_QUAD_BUFFER(unsigned short, totquad, buffers->index_buf);
}
else {
buffers->index_type = GL_UNSIGNED_INT;
FILL_QUAD_BUFFER(unsigned int, totquad, buffers->index_buf);
}
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
buffers->has_hidden = 1;
}
/* Build coord/normal VBO */
if (buffers->index_buf)
glGenBuffersARB(1, &buffers->vert_buf);
return buffers;
}
#undef FILL_QUAD_BUFFER
static void gpu_draw_buffers_legacy_mesh(GPU_Buffers *buffers, int smooth)
{
const MVert *mvert = buffers->mvert;
int i, j;
gpu_colors_enable(VBO_DISABLED);
for (i = 0; i < buffers->totface; ++i) {
MFace *f = buffers->mface + buffers->face_indices[i];
int S = f->v4 ? 4 : 3;
unsigned int *fv = &f->v1;
if (paint_is_face_hidden(f, buffers->mvert))
continue;
glBegin((f->v4) ? GL_QUADS : GL_TRIANGLES);
if (smooth) {
for (j = 0; j < S; j++) {
gpu_color_from_mask_set(buffers->vmask[fv[j]]);
glNormal3sv(mvert[fv[j]].no);
glVertex3fv(mvert[fv[j]].co);
}
}
else {
float fmask, fno[3];
/* calculate face normal */
if (f->v4) {
normal_quad_v3(fno, mvert[fv[0]].co, mvert[fv[1]].co,
mvert[fv[2]].co, mvert[fv[3]].co);
}
else
normal_tri_v3(fno, mvert[fv[0]].co, mvert[fv[1]].co, mvert[fv[2]].co);
glNormal3fv(fno);
/* calculate face mask color */
fmask = (buffers->vmask[fv[0]] +
buffers->vmask[fv[1]] +
buffers->vmask[fv[2]]);
if (f->v4)
fmask = (fmask + buffers->vmask[fv[3]]) * 0.25;
else
fmask /= 3.0f;
gpu_color_from_mask_set(fmask);
for (j = 0; j < S; j++)
glVertex3fv(mvert[fv[j]].co);
}
glEnd();
}
gpu_colors_disable(VBO_DISABLED);
}
static void gpu_draw_buffers_legacy_grids(GPU_Buffers *buffers, int smooth)
{
const CCGKey *key = &buffers->gridkey;
int i, j, x, y, gridsize = buffers->gridkey.grid_size;
gpu_colors_enable(VBO_DISABLED);
for (i = 0; i < buffers->totgrid; ++i) {
int g = buffers->grid_indices[i];
CCGElem *grid = buffers->grids[g];
BLI_bitmap gh = buffers->grid_hidden[g];
/* TODO: could use strips with hiding as well */
if (gh) {
glBegin(GL_QUADS);
for (y = 0; y < gridsize - 1; y++) {
for (x = 0; x < gridsize - 1; x++) {
CCGElem *e[4] = {
CCG_grid_elem(key, grid, x + 1, y + 1),
CCG_grid_elem(key, grid, x + 1, y),
CCG_grid_elem(key, grid, x, y),
CCG_grid_elem(key, grid, x, y + 1)
};
/* skip face if any of its corners are hidden */
if (paint_is_grid_face_hidden(gh, gridsize, x, y))
continue;
if (smooth) {
for (j = 0; j < 4; j++) {
gpu_color_from_mask_set(*CCG_elem_mask(key, e[j]));
glNormal3fv(CCG_elem_no(key, e[j]));
glVertex3fv(CCG_elem_co(key, e[j]));
}
}
else {
float fno[3];
normal_quad_v3(fno,
CCG_elem_co(key, e[0]),
CCG_elem_co(key, e[1]),
CCG_elem_co(key, e[2]),
CCG_elem_co(key, e[3]));
glNormal3fv(fno);
gpu_color_from_mask_quad_set(key, e[0], e[1], e[2], e[3]);
for (j = 0; j < 4; j++)
glVertex3fv(CCG_elem_co(key, e[j]));
}
}
}
glEnd();
}
else if (smooth) {
for (y = 0; y < gridsize - 1; y++) {
glBegin(GL_QUAD_STRIP);
for (x = 0; x < gridsize; x++) {
CCGElem *a = CCG_grid_elem(key, grid, x, y);
CCGElem *b = CCG_grid_elem(key, grid, x, y + 1);
gpu_color_from_mask_set(*CCG_elem_mask(key, a));
glNormal3fv(CCG_elem_no(key, a));
glVertex3fv(CCG_elem_co(key, a));
gpu_color_from_mask_set(*CCG_elem_mask(key, b));
glNormal3fv(CCG_elem_no(key, b));
glVertex3fv(CCG_elem_co(key, b));
}
glEnd();
}
}
else {
for (y = 0; y < gridsize - 1; y++) {
glBegin(GL_QUAD_STRIP);
for (x = 0; x < gridsize; x++) {
CCGElem *a = CCG_grid_elem(key, grid, x, y);
CCGElem *b = CCG_grid_elem(key, grid, x, y + 1);
if (x > 0) {
CCGElem *c = CCG_grid_elem(key, grid, x - 1, y);
CCGElem *d = CCG_grid_elem(key, grid, x - 1, y + 1);
float fno[3];
normal_quad_v3(fno,
CCG_elem_co(key, d),
CCG_elem_co(key, b),
CCG_elem_co(key, a),
CCG_elem_co(key, c));
glNormal3fv(fno);
gpu_color_from_mask_quad_set(key, a, b, c, d);
}
glVertex3fv(CCG_elem_co(key, a));
glVertex3fv(CCG_elem_co(key, b));
}
glEnd();
}
}
}
gpu_colors_disable(VBO_DISABLED);
}
void GPU_draw_buffers(GPU_Buffers *buffers, DMSetMaterial setMaterial)
{
int smooth = 0;
if (buffers->totface) {
const MFace *f = &buffers->mface[buffers->face_indices[0]];
if (!setMaterial(f->mat_nr + 1, NULL))
return;
smooth = f->flag & ME_SMOOTH;
glShadeModel(smooth ? GL_SMOOTH : GL_FLAT);
}
else if (buffers->totgrid) {
const DMFlagMat *f = &buffers->grid_flag_mats[buffers->grid_indices[0]];
if (!setMaterial(f->mat_nr + 1, NULL))
return;
smooth = f->flag & ME_SMOOTH;
glShadeModel(smooth ? GL_SMOOTH : GL_FLAT);
}
if (buffers->vert_buf && buffers->index_buf) {
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
gpu_colors_enable(VBO_ENABLED);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, buffers->index_buf);
if (buffers->tot_quad) {
char *offset = 0;
int i, last = buffers->has_hidden ? 1 : buffers->totgrid;
for (i = 0; i < last; i++) {
glVertexPointer(3, GL_FLOAT, sizeof(VertexBufferFormat),
offset + offsetof(VertexBufferFormat, co));
glNormalPointer(GL_SHORT, sizeof(VertexBufferFormat),
offset + offsetof(VertexBufferFormat, no));
glColorPointer(3, GL_UNSIGNED_BYTE, sizeof(VertexBufferFormat),
offset + offsetof(VertexBufferFormat, color));
glDrawElements(GL_QUADS, buffers->tot_quad * 4, buffers->index_type, 0);
offset += buffers->gridkey.grid_area * sizeof(VertexBufferFormat);
}
}
else {
glVertexPointer(3, GL_FLOAT, sizeof(VertexBufferFormat),
(void *)offsetof(VertexBufferFormat, co));
glNormalPointer(GL_SHORT, sizeof(VertexBufferFormat),
(void *)offsetof(VertexBufferFormat, no));
glColorPointer(3, GL_UNSIGNED_BYTE, sizeof(VertexBufferFormat),
(void *)offsetof(VertexBufferFormat, color));
glDrawElements(GL_TRIANGLES, buffers->tot_tri * 3, buffers->index_type, 0);
}
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
gpu_colors_disable(VBO_ENABLED);
}
/* fallbacks if we are out of memory or VBO is disabled */
else if (buffers->totface) {
gpu_draw_buffers_legacy_mesh(buffers, smooth);
}
else if (buffers->totgrid) {
gpu_draw_buffers_legacy_grids(buffers, smooth);
}
}
void GPU_free_buffers(GPU_Buffers *buffers)
{
if (buffers) {
if (buffers->vert_buf)
glDeleteBuffersARB(1, &buffers->vert_buf);
if (buffers->index_buf && (buffers->tot_tri || buffers->has_hidden))
glDeleteBuffersARB(1, &buffers->index_buf);
MEM_freeN(buffers);
}
}
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