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3fbd8abcfd01b3e8b47bfc8420e2be5fca50036c
blender-archive/source/blender/gpu/intern/gpu_buffers.c
Brecht Van Lommel 3fbd8abcfd OpenGL VBO's: free VBO pool before redraw, otherwise this just holds onto memory 
after objects are deleted until another big object is added. There's no good reason
to do this, or to think that our pool is somehow much faster than using the OpenGL
API to allocate and free buffers.
2013-08-09 19:55:43 +00:00

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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 "DNA_material_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"
#include "GPU_draw.h"
#include "bmesh.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 signed short and the range (assume material number is non-negative) */
#define MAX_MATERIALS MAXMAT
/* -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 void gpu_buffer_pool_free_unused(GPUBufferPool *pool)
{
if (!pool)
return;
while (pool->totbuf)
gpu_buffer_pool_delete_last(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;
}
void GPU_global_buffer_pool_free_unused(void)
{
gpu_buffer_pool_free_unused(gpu_buffer_pool);
}
/* 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 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;
}
}
}
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 = DM_get_tessface_data_layer(dm, dm->drawObject->colType)))
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, int colType)
{
if (!dm->drawObject) {
/* XXX Not really nice, but we need a valid gpu draw object to set the colType...
* Else we would have to add a new param to gpu_buffer_setup_common. */
dm->drawObject = GPU_drawobject_new(dm);
dm->dirty &= ~DM_DIRTY_MCOL_UPDATE_DRAW;
dm->drawObject->colType = colType;
}
/* In paint mode, dm may stay the same during stroke, however we still want to update colors!
* Also check in case we changed color type (i.e. which MCol cdlayer we use). */
else if ((dm->dirty & DM_DIRTY_MCOL_UPDATE_DRAW) || (colType != dm->drawObject->colType)) {
GPUBuffer **buf = gpu_drawobject_buffer_from_type(dm->drawObject, GPU_BUFFER_COLOR);
/* XXX Freeing this buffer is a bit stupid, as geometry has not changed, size should remain the same.
* Not sure though it would be worth defining a sort of gpu_buffer_update func - nor whether
* it is even possible ! */
GPU_buffer_free(*buf);
*buf = NULL;
dm->dirty &= ~DM_DIRTY_MCOL_UPDATE_DRAW;
dm->drawObject->colType = colType;
}
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);
}
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 */
/* Return false if VBO is either unavailable or disabled by the user,
* true otherwise */
static int gpu_vbo_enabled(void)
{
return (GLEW_ARB_vertex_buffer_object &&
!(U.gameflags & USER_DISABLE_VBO));
}
/* 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;
BLI_bitmap * const *grid_hidden;
int *grid_indices;
int totgrid;
int has_hidden;
int use_bmesh;
unsigned int tot_tri, tot_quad;
/* The PBVH ensures that either all faces in the node are
* smooth-shaded or all faces are flat-shaded */
int smooth;
int show_diffuse_color;
float diffuse_color[4];
};
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 * 0.75f;
}
static void gpu_color_from_mask_copy(float mask, const float diffuse_color[4], unsigned char out[3])
{
float mask_color;
mask_color = gpu_color_from_mask(mask) * 255.0f;
out[0] = diffuse_color[0] * mask_color;
out[1] = diffuse_color[1] * mask_color;
out[2] = diffuse_color[2] * mask_color;
}
static void gpu_color_from_mask_set(float mask, float diffuse_color[4])
{
float color = gpu_color_from_mask(mask);
glColor3f(diffuse_color[0] * color, diffuse_color[1] * color, diffuse_color[2] * 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,
const float *diffuse_color,
unsigned char out[3])
{
float mask_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] = diffuse_color[0] * mask_color;
out[1] = diffuse_color[1] * mask_color;
out[2] = diffuse_color[2] * mask_color;
}
static void gpu_color_from_mask_quad_set(const CCGKey *key,
CCGElem *a, CCGElem *b,
CCGElem *c, CCGElem *d,
float diffuse_color[4])
{
float color = gpu_color_from_mask_quad(key, a, b, c, d);
glColor3f(diffuse_color[0] * color, diffuse_color[1] * color, diffuse_color[2] * color);
}
void GPU_update_mesh_buffers(GPU_Buffers *buffers, MVert *mvert,
int *vert_indices, int totvert, const float *vmask,
int (*face_vert_indices)[4], int show_diffuse_color)
{
VertexBufferFormat *vert_data;
int i, j, k;
buffers->vmask = vmask;
buffers->show_diffuse_color = show_diffuse_color;
if (buffers->vert_buf) {
int totelem = (buffers->smooth ? totvert : (buffers->tot_tri * 3));
float diffuse_color[4] = {0.8f, 0.8f, 0.8f, 1.0f};
if (buffers->show_diffuse_color) {
MFace *f = buffers->mface + buffers->face_indices[0];
GPU_material_diffuse_get(f->mat_nr + 1, diffuse_color);
}
copy_v4_v4(buffers->diffuse_color, diffuse_color);
/* Build VBO */
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,
sizeof(VertexBufferFormat) * totelem,
NULL, GL_STATIC_DRAW_ARB);
vert_data = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if (vert_data) {
/* Vertex data is shared if smooth-shaded, but separate
* copies are made for flat shading because normals
* shouldn't be shared. */
if (buffers->smooth) {
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);
}
#define UPDATE_VERTEX(face, vertex, index, diffuse_color) \
{ \
VertexBufferFormat *out = vert_data + face_vert_indices[face][index]; \
if (vmask) \
gpu_color_from_mask_copy(vmask[vertex], diffuse_color, out->color); \
else \
rgb_float_to_uchar(out->color, diffuse_color); \
} (void)0
for (i = 0; i < buffers->totface; i++) {
MFace *f = buffers->mface + buffers->face_indices[i];
UPDATE_VERTEX(i, f->v1, 0, diffuse_color);
UPDATE_VERTEX(i, f->v2, 1, diffuse_color);
UPDATE_VERTEX(i, f->v3, 2, diffuse_color);
if (f->v4)
UPDATE_VERTEX(i, f->v4, 3, diffuse_color);
}
#undef UPDATE_VERTEX
}
else {
for (i = 0; i < buffers->totface; ++i) {
const MFace *f = &buffers->mface[buffers->face_indices[i]];
const unsigned int *fv = &f->v1;
const int vi[2][3] = {{0, 1, 2}, {3, 0, 2}};
float fno[3];
short no[3];
float fmask;
if (paint_is_face_hidden(f, mvert))
continue;
/* Face normal and mask */
if (f->v4) {
normal_quad_v3(fno,
mvert[fv[0]].co,
mvert[fv[1]].co,
mvert[fv[2]].co,
mvert[fv[3]].co);
if (vmask) {
fmask = (vmask[fv[0]] +
vmask[fv[1]] +
vmask[fv[2]] +
vmask[fv[3]]) * 0.25f;
}
}
else {
normal_tri_v3(fno,
mvert[fv[0]].co,
mvert[fv[1]].co,
mvert[fv[2]].co);
if (vmask) {
fmask = (vmask[fv[0]] +
vmask[fv[1]] +
vmask[fv[2]]) / 3.0f;
}
}
normal_float_to_short_v3(no, fno);
for (j = 0; j < (f->v4 ? 2 : 1); j++) {
for (k = 0; k < 3; k++) {
const MVert *v = &mvert[fv[vi[j][k]]];
VertexBufferFormat *out = vert_data;
copy_v3_v3(out->co, v->co);
memcpy(out->no, no, sizeof(short) * 3);
if (vmask)
gpu_color_from_mask_copy(fmask, diffuse_color, out->color);
else
rgb_float_to_uchar(out->color, diffuse_color);
vert_data++;
}
}
}
}
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;
buffers->smooth = mface[face_indices[0]].flag & ME_SMOOTH;
buffers->show_diffuse_color = FALSE;
/* 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;
}
/* An element index buffer is used for smooth shading, but flat
* shading requires separate vertex normals so an index buffer is
* can't be used there. */
if (gpu_vbo_enabled() && buffers->smooth)
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 (gpu_vbo_enabled() && (buffers->index_buf || !buffers->smooth))
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, int show_diffuse_color)
{
VertexBufferFormat *vert_data;
int i, j, k, x, y;
buffers->show_diffuse_color = show_diffuse_color;
/* Build VBO */
if (buffers->vert_buf) {
int totvert = key->grid_area * totgrid;
int smooth = grid_flag_mats[grid_indices[0]].flag & ME_SMOOTH;
const int has_mask = key->has_mask;
float diffuse_color[4] = {0.8f, 0.8f, 0.8f, 1.0f};
if (buffers->show_diffuse_color) {
const DMFlagMat *flags = &grid_flag_mats[grid_indices[0]];
GPU_material_diffuse_get(flags->mat_nr + 1, diffuse_color);
}
copy_v4_v4(buffers->diffuse_color, diffuse_color);
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));
if (has_mask) {
gpu_color_from_mask_copy(*CCG_elem_mask(key, elem),
diffuse_color, 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);
if (has_mask) {
gpu_color_from_mask_quad_copy(key,
elems[0],
elems[1],
elems[2],
elems[3],
diffuse_color,
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;
buffers->smooth = grid_flag_mats[grid_indices[0]].flag & ME_SMOOTH;
//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
* visibility */
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 */
BLI_bitmap * const *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 (!gpu_vbo_enabled()) {
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;
buffers->show_diffuse_color = FALSE;
/* 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
/* Output a BMVert into a VertexBufferFormat array
*
* The vertex is skipped if hidden, otherwise the output goes into
* index '*v_index' in the 'vert_data' array and '*v_index' is
* incremented.
*/
static void gpu_bmesh_vert_to_buffer_copy(BMVert *v,
VertexBufferFormat *vert_data,
int *v_index,
const float fno[3],
const float *fmask,
const int cd_vert_mask_offset)
{
if (!BM_elem_flag_test(v, BM_ELEM_HIDDEN)) {
VertexBufferFormat *vd = &vert_data[*v_index];
/* TODO: should use material color */
float diffuse_color[4] = {0.8f, 0.8f, 0.8f, 1.0f};
/* Set coord, normal, and mask */
copy_v3_v3(vd->co, v->co);
normal_float_to_short_v3(vd->no, fno ? fno : v->no);
gpu_color_from_mask_copy(
fmask ? *fmask :
BM_ELEM_CD_GET_FLOAT(v, cd_vert_mask_offset),
diffuse_color,
vd->color);
/* Assign index for use in the triangle index buffer */
BM_elem_index_set(v, (*v_index)); /* set_dirty! */
(*v_index)++;
}
}
/* Return the total number of vertices that don't have BM_ELEM_HIDDEN set */
static int gpu_bmesh_vert_visible_count(GHash *bm_unique_verts,
GHash *bm_other_verts)
{
GHashIterator gh_iter;
int totvert = 0;
GHASH_ITER (gh_iter, bm_unique_verts) {
BMVert *v = BLI_ghashIterator_getKey(&gh_iter);
if (!BM_elem_flag_test(v, BM_ELEM_HIDDEN))
totvert++;
}
GHASH_ITER (gh_iter, bm_other_verts) {
BMVert *v = BLI_ghashIterator_getKey(&gh_iter);
if (!BM_elem_flag_test(v, BM_ELEM_HIDDEN))
totvert++;
}
return totvert;
}
/* Return the total number of visible faces */
static int gpu_bmesh_face_visible_count(GHash *bm_faces)
{
GHashIterator gh_iter;
int totface = 0;
GHASH_ITER (gh_iter, bm_faces) {
BMFace *f = BLI_ghashIterator_getKey(&gh_iter);
if (!paint_is_bmesh_face_hidden(f))
totface++;
}
return totface;
}
/* Creates a vertex buffer (coordinate, normal, color) and, if smooth
* shading, an element index buffer. */
void GPU_update_bmesh_buffers(GPU_Buffers *buffers,
BMesh *bm,
GHash *bm_faces,
GHash *bm_unique_verts,
GHash *bm_other_verts)
{
VertexBufferFormat *vert_data;
void *tri_data;
int tottri, totvert, maxvert = 0;
/* TODO, make mask layer optional for bmesh buffer */
const int cd_vert_mask_offset = CustomData_get_offset(&bm->vdata, CD_PAINT_MASK);
if (!buffers->vert_buf || (buffers->smooth && !buffers->index_buf))
return;
/* Count visible triangles */
tottri = gpu_bmesh_face_visible_count(bm_faces);
if (buffers->smooth) {
/* Count visible vertices */
totvert = gpu_bmesh_vert_visible_count(bm_unique_verts, bm_other_verts);
}
else
totvert = tottri * 3;
/* Initialize vertex buffer */
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,
sizeof(VertexBufferFormat) * totvert,
NULL, GL_STATIC_DRAW_ARB);
/* Fill vertex buffer */
vert_data = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if (vert_data) {
GHashIterator gh_iter;
int v_index = 0;
if (buffers->smooth) {
/* Vertices get an index assigned for use in the triangle
* index buffer */
bm->elem_index_dirty |= BM_VERT;
GHASH_ITER (gh_iter, bm_unique_verts) {
gpu_bmesh_vert_to_buffer_copy(BLI_ghashIterator_getKey(&gh_iter),
vert_data, &v_index, NULL, NULL,
cd_vert_mask_offset);
}
GHASH_ITER (gh_iter, bm_other_verts) {
gpu_bmesh_vert_to_buffer_copy(BLI_ghashIterator_getKey(&gh_iter),
vert_data, &v_index, NULL, NULL,
cd_vert_mask_offset);
}
maxvert = v_index;
}
else {
GHASH_ITER (gh_iter, bm_faces) {
BMFace *f = BLI_ghashIterator_getKey(&gh_iter);
BLI_assert(f->len == 3);
if (!paint_is_bmesh_face_hidden(f)) {
BMVert *v[3];
float fmask = 0;
int i;
// BM_iter_as_array(bm, BM_VERTS_OF_FACE, f, (void**)v, 3);
BM_face_as_array_vert_tri(f, v);
/* Average mask value */
for (i = 0; i < 3; i++) {
fmask += BM_ELEM_CD_GET_FLOAT(v[i], cd_vert_mask_offset);
}
fmask /= 3.0f;
for (i = 0; i < 3; i++) {
gpu_bmesh_vert_to_buffer_copy(v[i], vert_data,
&v_index, f->no, &fmask,
cd_vert_mask_offset);
}
}
}
buffers->tot_tri = tottri;
}
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
}
else {
/* Memory map failed */
glDeleteBuffersARB(1, &buffers->vert_buf);
buffers->vert_buf = 0;
return;
}
if (buffers->smooth) {
const int use_short = (maxvert < USHRT_MAX);
/* Initialize triangle index buffer */
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, buffers->index_buf);
glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
(use_short ?
sizeof(unsigned short) :
sizeof(unsigned int)) * 3 * tottri,
NULL, GL_STATIC_DRAW_ARB);
/* Fill triangle index buffer */
tri_data = glMapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if (tri_data) {
GHashIterator gh_iter;
GHASH_ITER (gh_iter, bm_faces) {
BMFace *f = BLI_ghashIterator_getKey(&gh_iter);
if (!paint_is_bmesh_face_hidden(f)) {
BMLoop *l_iter;
BMLoop *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
BMVert *v = l_iter->v;
if (use_short) {
unsigned short *elem = tri_data;
(*elem) = BM_elem_index_get(v);
elem++;
tri_data = elem;
}
else {
unsigned int *elem = tri_data;
(*elem) = BM_elem_index_get(v);
elem++;
tri_data = elem;
}
} while ((l_iter = l_iter->next) != l_first);
}
}
glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB);
buffers->tot_tri = tottri;
buffers->index_type = (use_short ?
GL_UNSIGNED_SHORT :
GL_UNSIGNED_INT);
}
else {
/* Memory map failed */
glDeleteBuffersARB(1, &buffers->index_buf);
buffers->index_buf = 0;
}
}
}
GPU_Buffers *GPU_build_bmesh_buffers(int smooth_shading)
{
GPU_Buffers *buffers;
buffers = MEM_callocN(sizeof(GPU_Buffers), "GPU_Buffers");
if (smooth_shading)
glGenBuffersARB(1, &buffers->index_buf);
glGenBuffersARB(1, &buffers->vert_buf);
buffers->use_bmesh = TRUE;
buffers->smooth = smooth_shading;
return buffers;
}
static void gpu_draw_buffers_legacy_mesh(GPU_Buffers *buffers)
{
const MVert *mvert = buffers->mvert;
int i, j;
const int has_mask = (buffers->vmask != NULL);
const MFace *face = &buffers->mface[buffers->face_indices[0]];
float diffuse_color[4] = {0.8f, 0.8f, 0.8f, 1.0f};
if (buffers->show_diffuse_color)
GPU_material_diffuse_get(face->mat_nr + 1, diffuse_color);
if (has_mask) {
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 (buffers->smooth) {
for (j = 0; j < S; j++) {
if (has_mask) {
gpu_color_from_mask_set(buffers->vmask[fv[j]], diffuse_color);
}
glNormal3sv(mvert[fv[j]].no);
glVertex3fv(mvert[fv[j]].co);
}
}
else {
float 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);
if (has_mask) {
float fmask;
/* 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]]) * 0.25f;
else
fmask /= 3.0f;
gpu_color_from_mask_set(fmask, diffuse_color);
}
for (j = 0; j < S; j++)
glVertex3fv(mvert[fv[j]].co);
}
glEnd();
}
if (has_mask) {
gpu_colors_disable(VBO_DISABLED);
}
}
static void gpu_draw_buffers_legacy_grids(GPU_Buffers *buffers)
{
const CCGKey *key = &buffers->gridkey;
int i, j, x, y, gridsize = buffers->gridkey.grid_size;
const int has_mask = key->has_mask;
const DMFlagMat *flags = &buffers->grid_flag_mats[buffers->grid_indices[0]];
float diffuse_color[4] = {0.8f, 0.8f, 0.8f, 1.0f};
if (buffers->show_diffuse_color)
GPU_material_diffuse_get(flags->mat_nr + 1, diffuse_color);
if (has_mask) {
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 (buffers->smooth) {
for (j = 0; j < 4; j++) {
if (has_mask) {
gpu_color_from_mask_set(*CCG_elem_mask(key, e[j]), diffuse_color);
}
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);
if (has_mask) {
gpu_color_from_mask_quad_set(key, e[0], e[1], e[2], e[3], diffuse_color);
}
for (j = 0; j < 4; j++)
glVertex3fv(CCG_elem_co(key, e[j]));
}
}
}
glEnd();
}
else if (buffers->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);
if (has_mask) {
gpu_color_from_mask_set(*CCG_elem_mask(key, a), diffuse_color);
}
glNormal3fv(CCG_elem_no(key, a));
glVertex3fv(CCG_elem_co(key, a));
if (has_mask) {
gpu_color_from_mask_set(*CCG_elem_mask(key, b), diffuse_color);
}
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);
if (has_mask) {
gpu_color_from_mask_quad_set(key, a, b, c, d, diffuse_color);
}
}
glVertex3fv(CCG_elem_co(key, a));
glVertex3fv(CCG_elem_co(key, b));
}
glEnd();
}
}
}
if (has_mask) {
gpu_colors_disable(VBO_DISABLED);
}
}
void GPU_draw_buffers(GPU_Buffers *buffers, DMSetMaterial setMaterial,
int wireframe)
{
/* sets material from the first face, to solve properly face would need to
* be sorted in buckets by materials */
if (setMaterial) {
if (buffers->totface) {
const MFace *f = &buffers->mface[buffers->face_indices[0]];
if (!setMaterial(f->mat_nr + 1, NULL))
return;
}
else if (buffers->totgrid) {
const DMFlagMat *f = &buffers->grid_flag_mats[buffers->grid_indices[0]];
if (!setMaterial(f->mat_nr + 1, NULL))
return;
}
else {
if (!setMaterial(1, NULL))
return;
}
}
glShadeModel((buffers->smooth || buffers->totface) ? GL_SMOOTH : GL_FLAT);
if (buffers->vert_buf) {
glEnableClientState(GL_VERTEX_ARRAY);
if (!wireframe) {
glEnableClientState(GL_NORMAL_ARRAY);
gpu_colors_enable(VBO_ENABLED);
}
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
if (buffers->index_buf)
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, buffers->index_buf);
if (wireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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 {
int totelem = buffers->tot_tri * 3;
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));
if (buffers->index_buf)
glDrawElements(GL_TRIANGLES, totelem, buffers->index_type, 0);
else
glDrawArrays(GL_TRIANGLES, 0, totelem);
}
if (wireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
if (buffers->index_buf)
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
glDisableClientState(GL_VERTEX_ARRAY);
if (!wireframe) {
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);
}
else if (buffers->totgrid) {
gpu_draw_buffers_legacy_grids(buffers);
}
}
int GPU_buffers_diffuse_changed(GPU_Buffers *buffers, int show_diffuse_color)
{
float diffuse_color[4];
if (buffers->show_diffuse_color != show_diffuse_color)
return TRUE;
if (buffers->show_diffuse_color == FALSE)
return FALSE;
if (buffers->mface) {
MFace *f = buffers->mface + buffers->face_indices[0];
GPU_material_diffuse_get(f->mat_nr + 1, diffuse_color);
}
else {
const DMFlagMat *flags = &buffers->grid_flag_mats[buffers->grid_indices[0]];
GPU_material_diffuse_get(flags->mat_nr + 1, diffuse_color);
}
return diffuse_color[0] != buffers->diffuse_color[0] ||
diffuse_color[1] != buffers->diffuse_color[1] ||
diffuse_color[2] != buffers->diffuse_color[2];
}
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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