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Diffstat (limited to 'source/blender/draw/intern/draw_manager_exec.c')
| -rw-r--r-- | source/blender/draw/intern/draw_manager_exec.c | 1170 |
1 files changed, 1170 insertions, 0 deletions
diff --git a/source/blender/draw/intern/draw_manager_exec.c b/source/blender/draw/intern/draw_manager_exec.c new file mode 100644 index 00000000000..e69a1026815 --- /dev/null +++ b/source/blender/draw/intern/draw_manager_exec.c @@ -0,0 +1,1170 @@ +/* + * Copyright 2016, Blender Foundation. + * + * 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. + * + * Contributor(s): Blender Institute + * + */ + +/** \file blender/draw/intern/draw_manager_exec.c + * \ingroup draw + */ + +#include "draw_manager.h" + +#include "BLI_mempool.h" + +#include "BIF_glutil.h" + +#include "BKE_global.h" +#include "BKE_object.h" + +#include "GPU_draw.h" +#include "GPU_extensions.h" + +#ifdef USE_GPU_SELECT +# include "ED_view3d.h" +# include "ED_armature.h" +# include "GPU_select.h" +#endif + +#ifdef USE_GPU_SELECT +void DRW_select_load_id(unsigned int id) +{ + BLI_assert(G.f & G_PICKSEL); + DST.select_id = id; +} +#endif + +struct GPUUniformBuffer *view_ubo; + +/* -------------------------------------------------------------------- */ + +/** \name Draw State (DRW_state) + * \{ */ + +void drw_state_set(DRWState state) +{ + if (DST.state == state) { + return; + } + +#define CHANGED_TO(f) \ + ((DST.state_lock & (f)) ? 0 : \ + (((DST.state & (f)) ? \ + ((state & (f)) ? 0 : -1) : \ + ((state & (f)) ? 1 : 0)))) + +#define CHANGED_ANY(f) \ + (((DST.state & (f)) != (state & (f))) && \ + ((DST.state_lock & (f)) == 0)) + +#define CHANGED_ANY_STORE_VAR(f, enabled) \ + (((DST.state & (f)) != (enabled = (state & (f)))) && \ + (((DST.state_lock & (f)) == 0))) + + /* Depth Write */ + { + int test; + if ((test = CHANGED_TO(DRW_STATE_WRITE_DEPTH))) { + if (test == 1) { + glDepthMask(GL_TRUE); + } + else { + glDepthMask(GL_FALSE); + } + } + } + + /* Color Write */ + { + int test; + if ((test = CHANGED_TO(DRW_STATE_WRITE_COLOR))) { + if (test == 1) { + glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); + } + else { + glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); + } + } + } + + /* Cull */ + { + DRWState test; + if (CHANGED_ANY_STORE_VAR( + DRW_STATE_CULL_BACK | DRW_STATE_CULL_FRONT, + test)) + { + if (test) { + glEnable(GL_CULL_FACE); + + if ((state & DRW_STATE_CULL_BACK) != 0) { + glCullFace(GL_BACK); + } + else if ((state & DRW_STATE_CULL_FRONT) != 0) { + glCullFace(GL_FRONT); + } + else { + BLI_assert(0); + } + } + else { + glDisable(GL_CULL_FACE); + } + } + } + + /* Depth Test */ + { + DRWState test; + if (CHANGED_ANY_STORE_VAR( + DRW_STATE_DEPTH_LESS | DRW_STATE_DEPTH_EQUAL | DRW_STATE_DEPTH_GREATER | DRW_STATE_DEPTH_ALWAYS, + test)) + { + if (test) { + glEnable(GL_DEPTH_TEST); + + if (state & DRW_STATE_DEPTH_LESS) { + glDepthFunc(GL_LEQUAL); + } + else if (state & DRW_STATE_DEPTH_EQUAL) { + glDepthFunc(GL_EQUAL); + } + else if (state & DRW_STATE_DEPTH_GREATER) { + glDepthFunc(GL_GREATER); + } + else if (state & DRW_STATE_DEPTH_ALWAYS) { + glDepthFunc(GL_ALWAYS); + } + else { + BLI_assert(0); + } + } + else { + glDisable(GL_DEPTH_TEST); + } + } + } + + /* Wire Width */ + { + if (CHANGED_ANY(DRW_STATE_WIRE)) { + if ((state & DRW_STATE_WIRE) != 0) { + glLineWidth(1.0f); + } + else { + /* do nothing */ + } + } + } + + /* Points Size */ + { + int test; + if ((test = CHANGED_TO(DRW_STATE_POINT))) { + if (test == 1) { + GPU_enable_program_point_size(); + glPointSize(5.0f); + } + else { + GPU_disable_program_point_size(); + } + } + } + + /* Blending (all buffer) */ + { + int test; + if (CHANGED_ANY_STORE_VAR( + DRW_STATE_BLEND | DRW_STATE_ADDITIVE | DRW_STATE_MULTIPLY | DRW_STATE_TRANSMISSION | + DRW_STATE_ADDITIVE_FULL, + test)) + { + if (test) { + glEnable(GL_BLEND); + + if ((state & DRW_STATE_BLEND) != 0) { + glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, /* RGB */ + GL_ONE, GL_ONE_MINUS_SRC_ALPHA); /* Alpha */ + } + else if ((state & DRW_STATE_MULTIPLY) != 0) { + glBlendFunc(GL_DST_COLOR, GL_ZERO); + } + else if ((state & DRW_STATE_TRANSMISSION) != 0) { + glBlendFunc(GL_ONE, GL_SRC_ALPHA); + } + else if ((state & DRW_STATE_ADDITIVE) != 0) { + /* Do not let alpha accumulate but premult the source RGB by it. */ + glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE, /* RGB */ + GL_ZERO, GL_ONE); /* Alpha */ + } + else if ((state & DRW_STATE_ADDITIVE_FULL) != 0) { + /* Let alpha accumulate. */ + glBlendFunc(GL_ONE, GL_ONE); + } + else { + BLI_assert(0); + } + } + else { + glDisable(GL_BLEND); + } + } + } + + /* Clip Planes */ + { + int test; + if ((test = CHANGED_TO(DRW_STATE_CLIP_PLANES))) { + if (test == 1) { + for (int i = 0; i < DST.num_clip_planes; ++i) { + glEnable(GL_CLIP_DISTANCE0 + i); + } + } + else { + for (int i = 0; i < MAX_CLIP_PLANES; ++i) { + glDisable(GL_CLIP_DISTANCE0 + i); + } + } + } + } + + /* Line Stipple */ + { + int test; + if (CHANGED_ANY_STORE_VAR( + DRW_STATE_STIPPLE_2 | DRW_STATE_STIPPLE_3 | DRW_STATE_STIPPLE_4, + test)) + { + if (test) { + if ((state & DRW_STATE_STIPPLE_2) != 0) { + setlinestyle(2); + } + else if ((state & DRW_STATE_STIPPLE_3) != 0) { + setlinestyle(3); + } + else if ((state & DRW_STATE_STIPPLE_4) != 0) { + setlinestyle(4); + } + else { + BLI_assert(0); + } + } + else { + setlinestyle(0); + } + } + } + + /* Stencil */ + { + DRWState test; + if (CHANGED_ANY_STORE_VAR( + DRW_STATE_WRITE_STENCIL | + DRW_STATE_STENCIL_EQUAL, + test)) + { + if (test) { + glEnable(GL_STENCIL_TEST); + + /* Stencil Write */ + if ((state & DRW_STATE_WRITE_STENCIL) != 0) { + glStencilMask(0xFF); + glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE); + } + /* Stencil Test */ + else if ((state & DRW_STATE_STENCIL_EQUAL) != 0) { + glStencilMask(0x00); /* disable write */ + DST.stencil_mask = 0; + } + else { + BLI_assert(0); + } + } + else { + /* disable write & test */ + DST.stencil_mask = 0; + glStencilMask(0x00); + glStencilFunc(GL_ALWAYS, 1, 0xFF); + glDisable(GL_STENCIL_TEST); + } + } + } + +#undef CHANGED_TO +#undef CHANGED_ANY +#undef CHANGED_ANY_STORE_VAR + + DST.state = state; +} + +static void drw_stencil_set(unsigned int mask) +{ + if (DST.stencil_mask != mask) { + /* Stencil Write */ + if ((DST.state & DRW_STATE_WRITE_STENCIL) != 0) { + glStencilFunc(GL_ALWAYS, mask, 0xFF); + DST.stencil_mask = mask; + } + /* Stencil Test */ + else if ((DST.state & DRW_STATE_STENCIL_EQUAL) != 0) { + glStencilFunc(GL_EQUAL, mask, 0xFF); + DST.stencil_mask = mask; + } + } +} + +/* Reset state to not interfer with other UI drawcall */ +void DRW_state_reset_ex(DRWState state) +{ + DST.state = ~state; + drw_state_set(state); +} + +/** + * Use with care, intended so selection code can override passes depth settings, + * which is important for selection to work properly. + * + * Should be set in main draw loop, cleared afterwards + */ +void DRW_state_lock(DRWState state) +{ + DST.state_lock = state; +} + +void DRW_state_reset(void) +{ + /* Reset blending function */ + glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA); + + DRW_state_reset_ex(DRW_STATE_DEFAULT); +} + +/* NOTE : Make sure to reset after use! */ +void DRW_state_invert_facing(void) +{ + SWAP(GLenum, DST.backface, DST.frontface); + glFrontFace(DST.frontface); +} + +/** + * This only works if DRWPasses have been tagged with DRW_STATE_CLIP_PLANES, + * and if the shaders have support for it (see usage of gl_ClipDistance). + * Be sure to call DRW_state_clip_planes_reset() after you finish drawing. + **/ +void DRW_state_clip_planes_count_set(unsigned int plane_ct) +{ + BLI_assert(plane_ct <= MAX_CLIP_PLANES); + DST.num_clip_planes = plane_ct; +} + +void DRW_state_clip_planes_reset(void) +{ + DST.num_clip_planes = 0; +} + +/** \} */ + +/* -------------------------------------------------------------------- */ + +/** \name Clipping (DRW_clipping) + * \{ */ + +/* Extract the 8 corners (world space). + * Although less accurate, this solution can be simplified as follows: + * + * BKE_boundbox_init_from_minmax(&bbox, (const float[3]){-1.0f, -1.0f, -1.0f}, (const float[3]){1.0f, 1.0f, 1.0f}); + * for (int i = 0; i < 8; i++) {mul_project_m4_v3(viewprojinv, bbox.vec[i]);} + */ +static void draw_frustum_boundbox_calc(const float (*projmat)[4], const float (*viewinv)[4], BoundBox *r_bbox) +{ + float screenvecs[3][3], loc[3], near, far, w_half, h_half; + bool is_persp = projmat[3][3] == 0.0f; + copy_m3_m4(screenvecs, viewinv); + copy_v3_v3(loc, viewinv[3]); + + /* get the values of the minimum and maximum clipping planes distances + * and half the width and height of the nearplane rectangle. */ + if (is_persp) { + near = projmat[3][2] / (projmat[2][2] - 1.0f); + far = projmat[3][2] / (projmat[2][2] + 1.0f); + w_half = near / projmat[0][0]; + h_half = near / projmat[1][1]; + } + else { + near = (projmat[3][2] + 1.0f) / projmat[2][2]; + far = (projmat[3][2] - 1.0f) / projmat[2][2]; + w_half = 1.0f / projmat[0][0]; + h_half = 1.0f / projmat[1][1]; + } + + /* With vectors aligned to the screen, reconstruct + * the near plane from the dimensions obtained earlier. */ + float mid[3], hor[3], ver[3]; + mul_v3_v3fl(hor, screenvecs[0], w_half); + mul_v3_v3fl(ver, screenvecs[1], h_half); + madd_v3_v3v3fl(mid, loc, screenvecs[2], -near); + + /* The case below is for non-symmetric frustum. */ + if (is_persp) { + madd_v3_v3fl(mid, hor, projmat[2][0]); + madd_v3_v3fl(mid, ver, projmat[2][1]); + } + else { + madd_v3_v3fl(mid, hor, projmat[3][0]); + madd_v3_v3fl(mid, ver, projmat[3][1]); + } + + r_bbox->vec[0][0] = mid[0] - ver[0] - hor[0]; + r_bbox->vec[0][1] = mid[1] - ver[1] - hor[1]; + r_bbox->vec[0][2] = mid[2] - ver[2] - hor[2]; + + r_bbox->vec[3][0] = mid[0] + ver[0] - hor[0]; + r_bbox->vec[3][1] = mid[1] + ver[1] - hor[1]; + r_bbox->vec[3][2] = mid[2] + ver[2] - hor[2]; + + r_bbox->vec[7][0] = mid[0] + ver[0] + hor[0]; + r_bbox->vec[7][1] = mid[1] + ver[1] + hor[1]; + r_bbox->vec[7][2] = mid[2] + ver[2] + hor[2]; + + r_bbox->vec[4][0] = mid[0] - ver[0] + hor[0]; + r_bbox->vec[4][1] = mid[1] - ver[1] + hor[1]; + r_bbox->vec[4][2] = mid[2] - ver[2] + hor[2]; + + /* Get the coordinates of the far plane. */ + if (is_persp) { + float sca_far = far / near; + mid[0] = mid[0] + (mid[0] - loc[0]) * sca_far; + mid[1] = mid[1] + (mid[1] - loc[1]) * sca_far; + mid[2] = mid[2] + (mid[2] - loc[2]) * sca_far; + + mul_v3_fl(hor, sca_far); + mul_v3_fl(ver, sca_far); + } + else { + madd_v3_v3v3fl(mid, loc, screenvecs[2], -far); + + /* Non-symmetric frustum. */ + madd_v3_v3fl(mid, hor, projmat[3][0]); + madd_v3_v3fl(mid, ver, projmat[3][1]); + } + + r_bbox->vec[1][0] = mid[0] - ver[0] - hor[0]; + r_bbox->vec[1][1] = mid[1] - ver[1] - hor[1]; + r_bbox->vec[1][2] = mid[2] - ver[2] - hor[2]; + + r_bbox->vec[2][0] = mid[0] + ver[0] - hor[0]; + r_bbox->vec[2][1] = mid[1] + ver[1] - hor[1]; + r_bbox->vec[2][2] = mid[2] + ver[2] - hor[2]; + + r_bbox->vec[6][0] = mid[0] + ver[0] + hor[0]; + r_bbox->vec[6][1] = mid[1] + ver[1] + hor[1]; + r_bbox->vec[6][2] = mid[2] + ver[2] + hor[2]; + + r_bbox->vec[5][0] = mid[0] - ver[0] + hor[0]; + r_bbox->vec[5][1] = mid[1] - ver[1] + hor[1]; + r_bbox->vec[5][2] = mid[2] - ver[2] + hor[2]; +} + +static void draw_clipping_setup_from_view(void) +{ + if (DST.clipping.updated) + return; + + float (*viewinv)[4] = DST.view_data.matstate.mat[DRW_MAT_VIEWINV]; + float (*projmat)[4] = DST.view_data.matstate.mat[DRW_MAT_WIN]; + float (*projinv)[4] = DST.view_data.matstate.mat[DRW_MAT_WININV]; + BoundSphere *bsphere = &DST.clipping.frustum_bsphere; + + /* Extract Clipping Planes */ + BoundBox bbox; + draw_frustum_boundbox_calc(projmat, viewinv, &bbox); + + /* Compute clip planes using the world space frustum corners. */ + for (int p = 0; p < 6; p++) { + int q, r; + switch (p) { + case 0: q=1; r=2; break; + case 1: q=0; r=5; break; + case 2: q=1; r=5; break; + case 3: q=2; r=6; break; + case 4: q=0; r=3; break; + default: q=4; r=7; break; + } + if (DST.frontface == GL_CW) { + SWAP(int, q, r); + } + + normal_tri_v3(DST.clipping.frustum_planes[p], bbox.vec[p], bbox.vec[q], bbox.vec[r]); + DST.clipping.frustum_planes[p][3] = -dot_v3v3(DST.clipping.frustum_planes[p], bbox.vec[p]); + } + + /* Extract Bounding Sphere */ + if (projmat[3][3] != 0.0f) { + /* Orthographic */ + /* The most extreme points on the near and far plane. (normalized device coords). */ + float *nearpoint = bbox.vec[0]; + float *farpoint = bbox.vec[6]; + + mul_project_m4_v3(projinv, nearpoint); + mul_project_m4_v3(projinv, farpoint); + + /* just use median point */ + mid_v3_v3v3(bsphere->center, farpoint, nearpoint); + bsphere->radius = len_v3v3(bsphere->center, farpoint); + } + else if (projmat[2][0] == 0.0f && projmat[2][1] == 0.0f) { + /* Perspective with symmetrical frustum. */ + + /* We obtain the center and radius of the circumscribed circle of the + * isosceles trapezoid composed by the diagonals of the near and far clipping plane */ + + /* center of each clipping plane */ + float mid_min[3], mid_max[3]; + mid_v3_v3v3(mid_min, bbox.vec[3], bbox.vec[4]); + mid_v3_v3v3(mid_max, bbox.vec[2], bbox.vec[5]); + + /* square length of the diagonals of each clipping plane */ + float a_sq = len_squared_v3v3(bbox.vec[3], bbox.vec[4]); + float b_sq = len_squared_v3v3(bbox.vec[2], bbox.vec[5]); + + /* distance squared between clipping planes */ + float h_sq = len_squared_v3v3(mid_min, mid_max); + + float fac = (4 * h_sq + b_sq - a_sq) / (8 * h_sq); + BLI_assert(fac >= 0.0f); + + /* The goal is to get the smallest sphere, + * not the sphere that passes through each corner */ + CLAMP(fac, 0.0f, 1.0f); + + interp_v3_v3v3(bsphere->center, mid_min, mid_max, fac); + + /* distance from the center to one of the points of the far plane (1, 2, 5, 6) */ + bsphere->radius = len_v3v3(bsphere->center, bbox.vec[1]); + } + else { + /* Perspective with asymmetrical frustum. */ + + /* We put the sphere center on the line that goes from origin + * to the center of the far clipping plane. */ + + /* Detect which of the corner of the far clipping plane is the farthest to the origin */ + float nfar[4]; /* most extreme far point in NDC space */ + float farxy[2]; /* farpoint projection onto the near plane */ + float farpoint[3] = {0.0f}; /* most extreme far point in camera coordinate */ + float nearpoint[3]; /* most extreme near point in camera coordinate */ + float farcenter[3] = {0.0f}; /* center of far cliping plane in camera coordinate */ + float F = -1.0f, N; /* square distance of far and near point to origin */ + float f, n; /* distance of far and near point to z axis. f is always > 0 but n can be < 0 */ + float e, s; /* far and near clipping distance (<0) */ + float c; /* slope of center line = distance of far clipping center to z axis / far clipping distance */ + float z; /* projection of sphere center on z axis (<0) */ + + /* Find farthest corner and center of far clip plane. */ + float corner[3] = {1.0f, 1.0f, 1.0f}; /* in clip space */ + for (int i = 0; i < 4; i++) { + float point[3]; + mul_v3_project_m4_v3(point, projinv, corner); + float len = len_squared_v3(point); + if (len > F) { + copy_v3_v3(nfar, corner); + copy_v3_v3(farpoint, point); + F = len; + } + add_v3_v3(farcenter, point); + /* rotate by 90 degree to walk through the 4 points of the far clip plane */ + float tmp = corner[0]; + corner[0] = -corner[1]; + corner[1] = tmp; + } + + /* the far center is the average of the far clipping points */ + mul_v3_fl(farcenter, 0.25f); + /* the extreme near point is the opposite point on the near clipping plane */ + copy_v3_fl3(nfar, -nfar[0], -nfar[1], -1.0f); + mul_v3_project_m4_v3(nearpoint, projinv, nfar); + /* this is a frustum projection */ + N = len_squared_v3(nearpoint); + e = farpoint[2]; + s = nearpoint[2]; + /* distance to view Z axis */ + f = len_v2(farpoint); + /* get corresponding point on the near plane */ + mul_v2_v2fl(farxy, farpoint, s/e); + /* this formula preserve the sign of n */ + sub_v2_v2(nearpoint, farxy); + n = f * s / e - len_v2(nearpoint); + c = len_v2(farcenter) / e; + /* the big formula, it simplifies to (F-N)/(2(e-s)) for the symmetric case */ + z = (F-N) / (2.0f * (e-s + c*(f-n))); + + bsphere->center[0] = farcenter[0] * z/e; + bsphere->center[1] = farcenter[1] * z/e; + bsphere->center[2] = z; + bsphere->radius = len_v3v3(bsphere->center, farpoint); + + /* Transform to world space. */ + mul_m4_v3(viewinv, bsphere->center); + } + + DST.clipping.updated = true; +} + +/* Return True if the given BoundSphere intersect the current view frustum */ +bool DRW_culling_sphere_test(BoundSphere *bsphere) +{ + draw_clipping_setup_from_view(); + + /* Bypass test if radius is negative. */ + if (bsphere->radius < 0.0f) + return true; + + /* Do a rough test first: Sphere VS Sphere intersect. */ + BoundSphere *frustum_bsphere = &DST.clipping.frustum_bsphere; + float center_dist = len_squared_v3v3(bsphere->center, frustum_bsphere->center); + if (center_dist > SQUARE(bsphere->radius + frustum_bsphere->radius)) + return false; + + /* Test against the 6 frustum planes. */ + for (int p = 0; p < 6; p++) { + float dist = plane_point_side_v3(DST.clipping.frustum_planes[p], bsphere->center); + if (dist < -bsphere->radius) { + return false; + } + } + + return true; +} + +/* Return True if the given BoundBox intersect the current view frustum. + * bbox must be in world space. */ +bool DRW_culling_box_test(BoundBox *bbox) +{ + draw_clipping_setup_from_view(); + + /* 6 view frustum planes */ + for (int p = 0; p < 6; p++) { + /* 8 box vertices. */ + for (int v = 0; v < 8 ; v++) { + float dist = plane_point_side_v3(DST.clipping.frustum_planes[p], bbox->vec[v]); + if (dist > 0.0f) { + /* At least one point in front of this plane. + * Go to next plane. */ + break; + } + else if (v == 7) { + /* 8 points behind this plane. */ + return false; + } + } + } + + return true; +} + +/** \} */ + +/* -------------------------------------------------------------------- */ + +/** \name Draw (DRW_draw) + * \{ */ + +static void draw_matrices_model_prepare(DRWCallState *st) +{ + if (st->cache_id == DST.state_cache_id) { + return; /* Values are already updated for this view. */ + } + else { + st->cache_id = DST.state_cache_id; + } + + if (DRW_culling_sphere_test(&st->bsphere)) { + st->flag &= ~DRW_CALL_CULLED; + } + else { + st->flag |= DRW_CALL_CULLED; + return; /* No need to go further the call will not be used. */ + } + + /* Order matters */ + if (st->matflag & (DRW_CALL_MODELVIEW | DRW_CALL_MODELVIEWINVERSE | + DRW_CALL_NORMALVIEW | DRW_CALL_EYEVEC)) + { + mul_m4_m4m4(st->modelview, DST.view_data.matstate.mat[DRW_MAT_VIEW], st->model); + } + if (st->matflag & DRW_CALL_MODELVIEWINVERSE) { + invert_m4_m4(st->modelviewinverse, st->modelview); + } + if (st->matflag & DRW_CALL_MODELVIEWPROJECTION) { + mul_m4_m4m4(st->modelviewprojection, DST.view_data.matstate.mat[DRW_MAT_PERS], st->model); + } + if (st->matflag & (DRW_CALL_NORMALVIEW | DRW_CALL_EYEVEC)) { + copy_m3_m4(st->normalview, st->modelview); + invert_m3(st->normalview); + transpose_m3(st->normalview); + } + if (st->matflag & DRW_CALL_EYEVEC) { + /* Used by orthographic wires */ + float tmp[3][3]; + copy_v3_fl3(st->eyevec, 0.0f, 0.0f, 1.0f); + invert_m3_m3(tmp, st->normalview); + /* set eye vector, transformed to object coords */ + mul_m3_v3(tmp, st->eyevec); + } + /* Non view dependant */ + if (st->matflag & DRW_CALL_MODELINVERSE) { + invert_m4_m4(st->modelinverse, st->model); + st->matflag &= ~DRW_CALL_MODELINVERSE; + } + if (st->matflag & DRW_CALL_NORMALWORLD) { + copy_m3_m4(st->normalworld, st->model); + invert_m3(st->normalworld); + transpose_m3(st->normalworld); + st->matflag &= ~DRW_CALL_NORMALWORLD; + } +} + +static void draw_geometry_prepare(DRWShadingGroup *shgroup, DRWCallState *state) +{ + /* step 1 : bind object dependent matrices */ + if (state != NULL) { + GPU_shader_uniform_vector(shgroup->shader, shgroup->model, 16, 1, (float *)state->model); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelinverse, 16, 1, (float *)state->modelinverse); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelview, 16, 1, (float *)state->modelview); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelviewinverse, 16, 1, (float *)state->modelviewinverse); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelviewprojection, 16, 1, (float *)state->modelviewprojection); + GPU_shader_uniform_vector(shgroup->shader, shgroup->normalview, 9, 1, (float *)state->normalview); + GPU_shader_uniform_vector(shgroup->shader, shgroup->normalworld, 9, 1, (float *)state->normalworld); + GPU_shader_uniform_vector(shgroup->shader, shgroup->orcotexfac, 3, 2, (float *)state->orcotexfac); + GPU_shader_uniform_vector(shgroup->shader, shgroup->eye, 3, 1, (float *)state->eyevec); + } + else { + BLI_assert((shgroup->normalview == -1) && (shgroup->normalworld == -1) && (shgroup->eye == -1)); + /* For instancing and batching. */ + float unitmat[4][4]; + unit_m4(unitmat); + GPU_shader_uniform_vector(shgroup->shader, shgroup->model, 16, 1, (float *)unitmat); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelinverse, 16, 1, (float *)unitmat); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelview, 16, 1, (float *)DST.view_data.matstate.mat[DRW_MAT_VIEW]); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelviewinverse, 16, 1, (float *)DST.view_data.matstate.mat[DRW_MAT_VIEWINV]); + GPU_shader_uniform_vector(shgroup->shader, shgroup->modelviewprojection, 16, 1, (float *)DST.view_data.matstate.mat[DRW_MAT_PERS]); + GPU_shader_uniform_vector(shgroup->shader, shgroup->orcotexfac, 3, 2, (float *)shgroup->instance_orcofac); + } +} + +static void draw_geometry_execute_ex( + DRWShadingGroup *shgroup, Gwn_Batch *geom, unsigned int start, unsigned int count, bool draw_instance) +{ + /* Special case: empty drawcall, placement is done via shader, don't bind anything. */ + if (geom == NULL) { + BLI_assert(shgroup->type == DRW_SHG_TRIANGLE_BATCH); /* Add other type if needed. */ + /* Shader is already bound. */ + GWN_draw_primitive(GWN_PRIM_TRIS, count); + return; + } + + /* step 2 : bind vertex array & draw */ + GWN_batch_program_set_no_use(geom, GPU_shader_get_program(shgroup->shader), GPU_shader_get_interface(shgroup->shader)); + /* XXX hacking gawain. we don't want to call glUseProgram! (huge performance loss) */ + geom->program_in_use = true; + + GWN_batch_draw_range_ex(geom, start, count, draw_instance); + + geom->program_in_use = false; /* XXX hacking gawain */ +} + +static void draw_geometry_execute(DRWShadingGroup *shgroup, Gwn_Batch *geom) +{ + draw_geometry_execute_ex(shgroup, geom, 0, 0, false); +} + +enum { + BIND_NONE = 0, + BIND_TEMP = 1, /* Release slot after this shading group. */ + BIND_PERSIST = 2, /* Release slot only after the next shader change. */ +}; + +static void bind_texture(GPUTexture *tex, char bind_type) +{ + int index; + char *slot_flags = DST.RST.bound_tex_slots; + int bind_num = GPU_texture_bound_number(tex); + if (bind_num == -1) { + for (int i = 0; i < GPU_max_textures(); ++i) { + index = DST.RST.bind_tex_inc = (DST.RST.bind_tex_inc + 1) % GPU_max_textures(); + if (slot_flags[index] == BIND_NONE) { + if (DST.RST.bound_texs[index] != NULL) { + GPU_texture_unbind(DST.RST.bound_texs[index]); + } + GPU_texture_bind(tex, index); + DST.RST.bound_texs[index] = tex; + slot_flags[index] = bind_type; + // printf("Binds Texture %d %p\n", DST.RST.bind_tex_inc, tex); + return; + } + } + printf("Not enough texture slots! Reduce number of textures used by your shader.\n"); + } + slot_flags[bind_num] = bind_type; +} + +static void bind_ubo(GPUUniformBuffer *ubo, char bind_type) +{ + int index; + char *slot_flags = DST.RST.bound_ubo_slots; + int bind_num = GPU_uniformbuffer_bindpoint(ubo); + if (bind_num == -1) { + for (int i = 0; i < GPU_max_ubo_binds(); ++i) { + index = DST.RST.bind_ubo_inc = (DST.RST.bind_ubo_inc + 1) % GPU_max_ubo_binds(); + if (slot_flags[index] == BIND_NONE) { + if (DST.RST.bound_ubos[index] != NULL) { + GPU_uniformbuffer_unbind(DST.RST.bound_ubos[index]); + } + GPU_uniformbuffer_bind(ubo, index); + DST.RST.bound_ubos[index] = ubo; + slot_flags[index] = bind_type; + return; + } + } + /* printf so user can report bad behaviour */ + printf("Not enough ubo slots! This should not happen!\n"); + /* This is not depending on user input. + * It is our responsability to make sure there is enough slots. */ + BLI_assert(0); + } + slot_flags[bind_num] = bind_type; +} + +static void release_texture_slots(bool with_persist) +{ + if (with_persist) { + memset(DST.RST.bound_tex_slots, 0x0, sizeof(*DST.RST.bound_tex_slots) * GPU_max_textures()); + } + else { + for (int i = 0; i < GPU_max_textures(); ++i) { + if (DST.RST.bound_tex_slots[i] != BIND_PERSIST) + DST.RST.bound_tex_slots[i] = BIND_NONE; + } + } + + /* Reset so that slots are consistenly assigned for different shader + * draw calls, to avoid shader specialization/patching by the driver. */ + DST.RST.bind_tex_inc = 0; +} + +static void release_ubo_slots(bool with_persist) +{ + if (with_persist) { + memset(DST.RST.bound_ubo_slots, 0x0, sizeof(*DST.RST.bound_ubo_slots) * GPU_max_ubo_binds()); + } + else { + for (int i = 0; i < GPU_max_ubo_binds(); ++i) { + if (DST.RST.bound_ubo_slots[i] != BIND_PERSIST) + DST.RST.bound_ubo_slots[i] = BIND_NONE; + } + } + + /* Reset so that slots are consistenly assigned for different shader + * draw calls, to avoid shader specialization/patching by the driver. */ + DST.RST.bind_ubo_inc = 0; +} + +static void draw_shgroup(DRWShadingGroup *shgroup, DRWState pass_state) +{ + BLI_assert(shgroup->shader); + + GPUTexture *tex; + GPUUniformBuffer *ubo; + int val; + float fval; + const bool shader_changed = (DST.shader != shgroup->shader); + + if (shader_changed) { + if (DST.shader) GPU_shader_unbind(); + GPU_shader_bind(shgroup->shader); + DST.shader = shgroup->shader; + } + + release_ubo_slots(shader_changed); + release_texture_slots(shader_changed); + + drw_state_set((pass_state & shgroup->state_extra_disable) | shgroup->state_extra); + drw_stencil_set(shgroup->stencil_mask); + + /* Binding Uniform */ + /* Don't check anything, Interface should already contain the least uniform as possible */ + for (DRWUniform *uni = shgroup->uniforms; uni; uni = uni->next) { + switch (uni->type) { + case DRW_UNIFORM_SHORT_TO_INT: + val = (int)*((short *)uni->value); + GPU_shader_uniform_vector_int( + shgroup->shader, uni->location, uni->length, uni->arraysize, (int *)&val); + break; + case DRW_UNIFORM_SHORT_TO_FLOAT: + fval = (float)*((short *)uni->value); + GPU_shader_uniform_vector( + shgroup->shader, uni->location, uni->length, uni->arraysize, (float *)&fval); + break; + case DRW_UNIFORM_BOOL: + case DRW_UNIFORM_INT: + GPU_shader_uniform_vector_int( + shgroup->shader, uni->location, uni->length, uni->arraysize, (int *)uni->value); + break; + case DRW_UNIFORM_FLOAT: + GPU_shader_uniform_vector( + shgroup->shader, uni->location, uni->length, uni->arraysize, (float *)uni->value); + break; + case DRW_UNIFORM_TEXTURE: + tex = (GPUTexture *)uni->value; + BLI_assert(tex); + bind_texture(tex, BIND_TEMP); + GPU_shader_uniform_texture(shgroup->shader, uni->location, tex); + break; + case DRW_UNIFORM_TEXTURE_PERSIST: + tex = (GPUTexture *)uni->value; + BLI_assert(tex); + bind_texture(tex, BIND_PERSIST); + GPU_shader_uniform_texture(shgroup->shader, uni->location, tex); + break; + case DRW_UNIFORM_TEXTURE_REF: + tex = *((GPUTexture **)uni->value); + BLI_assert(tex); + bind_texture(tex, BIND_TEMP); + GPU_shader_uniform_texture(shgroup->shader, uni->location, tex); + break; + case DRW_UNIFORM_BLOCK: + ubo = (GPUUniformBuffer *)uni->value; + bind_ubo(ubo, BIND_TEMP); + GPU_shader_uniform_buffer(shgroup->shader, uni->location, ubo); + break; + case DRW_UNIFORM_BLOCK_PERSIST: + ubo = (GPUUniformBuffer *)uni->value; + bind_ubo(ubo, BIND_PERSIST); + GPU_shader_uniform_buffer(shgroup->shader, uni->location, ubo); + break; + } + } + +#ifdef USE_GPU_SELECT +# define GPU_SELECT_LOAD_IF_PICKSEL(_select_id) \ + if (G.f & G_PICKSEL) { \ + GPU_select_load_id(_select_id); \ + } ((void)0) + +# define GPU_SELECT_LOAD_IF_PICKSEL_CALL(_call) \ + if ((G.f & G_PICKSEL) && (_call)) { \ + GPU_select_load_id((_call)->select_id); \ + } ((void)0) + +# define GPU_SELECT_LOAD_IF_PICKSEL_LIST(_shgroup, _start, _count) \ + _start = 0; \ + _count = _shgroup->instance_count; \ + int *select_id = NULL; \ + if (G.f & G_PICKSEL) { \ + if (_shgroup->override_selectid == -1) { \ + select_id = DRW_instance_data_get(_shgroup->inst_selectid); \ + switch (_shgroup->type) { \ + case DRW_SHG_TRIANGLE_BATCH: _count = 3; break; \ + case DRW_SHG_LINE_BATCH: _count = 2; break; \ + default: _count = 1; break; \ + } \ + } \ + else { \ + GPU_select_load_id(_shgroup->override_selectid); \ + } \ + } \ + while (_start < _shgroup->instance_count) { \ + if (select_id) { \ + GPU_select_load_id(select_id[_start]); \ + } + +# define GPU_SELECT_LOAD_IF_PICKSEL_LIST_END(_start, _count) \ + _start += _count; \ + } + +#else +# define GPU_SELECT_LOAD_IF_PICKSEL(select_id) +# define GPU_SELECT_LOAD_IF_PICKSEL_CALL(call) +# define GPU_SELECT_LOAD_IF_PICKSEL_LIST_END(start, count) +# define GPU_SELECT_LOAD_IF_PICKSEL_LIST(_shgroup, _start, _count) \ + _start = 0; \ + _count = _shgroup->interface.instance_count; + +#endif + + /* Rendering Calls */ + if (!ELEM(shgroup->type, DRW_SHG_NORMAL)) { + /* Replacing multiple calls with only one */ + if (ELEM(shgroup->type, DRW_SHG_INSTANCE, DRW_SHG_INSTANCE_EXTERNAL)) { + if (shgroup->type == DRW_SHG_INSTANCE_EXTERNAL) { + if (shgroup->instance_geom != NULL) { + GPU_SELECT_LOAD_IF_PICKSEL(shgroup->override_selectid); + draw_geometry_prepare(shgroup, NULL); + draw_geometry_execute_ex(shgroup, shgroup->instance_geom, 0, 0, true); + } + } + else { + if (shgroup->instance_count > 0) { + unsigned int count, start; + draw_geometry_prepare(shgroup, NULL); + GPU_SELECT_LOAD_IF_PICKSEL_LIST(shgroup, start, count) + { + draw_geometry_execute_ex(shgroup, shgroup->instance_geom, start, count, true); + } + GPU_SELECT_LOAD_IF_PICKSEL_LIST_END(start, count) + } + } + } + else { /* DRW_SHG_***_BATCH */ + /* Some dynamic batch can have no geom (no call to aggregate) */ + if (shgroup->instance_count > 0) { + unsigned int count, start; + draw_geometry_prepare(shgroup, NULL); + GPU_SELECT_LOAD_IF_PICKSEL_LIST(shgroup, start, count) + { + draw_geometry_execute_ex(shgroup, shgroup->batch_geom, start, count, false); + } + GPU_SELECT_LOAD_IF_PICKSEL_LIST_END(start, count) + } + } + } + else { + bool prev_neg_scale = false; + for (DRWCall *call = shgroup->calls.first; call; call = call->next) { + + /* OPTI/IDEA(clem): Do this preparation in another thread. */ + draw_matrices_model_prepare(call->state); + + if ((call->state->flag & DRW_CALL_CULLED) != 0) + continue; + + /* Negative scale objects */ + bool neg_scale = call->state->flag & DRW_CALL_NEGSCALE; + if (neg_scale != prev_neg_scale) { + glFrontFace((neg_scale) ? DST.backface : DST.frontface); + prev_neg_scale = neg_scale; + } + + GPU_SELECT_LOAD_IF_PICKSEL_CALL(call); + draw_geometry_prepare(shgroup, call->state); + + switch (call->type) { + case DRW_CALL_SINGLE: + draw_geometry_execute(shgroup, call->single.geometry); + break; + case DRW_CALL_INSTANCES: + draw_geometry_execute_ex(shgroup, call->instances.geometry, 0, *call->instances.count, true); + break; + case DRW_CALL_GENERATE: + call->generate.geometry_fn(shgroup, draw_geometry_execute, call->generate.user_data); + break; + default: + BLI_assert(0); + } + } + /* Reset state */ + glFrontFace(DST.frontface); + } + + /* TODO: remove, (currently causes alpha issue with sculpt, need to investigate) */ + DRW_state_reset(); +} + +static void drw_update_view(void) +{ + if (DST.dirty_mat) { + DST.state_cache_id++; + DST.dirty_mat = false; + + DRW_uniformbuffer_update(view_ubo, &DST.view_data); + + /* Catch integer wrap around. */ + if (UNLIKELY(DST.state_cache_id == 0)) { + DST.state_cache_id = 1; + /* We must reset all CallStates to ensure that not + * a single one stayed with cache_id equal to 1. */ + BLI_mempool_iter iter; + DRWCallState *state; + BLI_mempool_iternew(DST.vmempool->states, &iter); + while ((state = BLI_mempool_iterstep(&iter))) { + state->cache_id = 0; + } + } + + /* TODO dispatch threads to compute matrices/culling */ + } + + draw_clipping_setup_from_view(); +} + +static void drw_draw_pass_ex(DRWPass *pass, DRWShadingGroup *start_group, DRWShadingGroup *end_group) +{ + DST.shader = NULL; + + BLI_assert(DST.buffer_finish_called && "DRW_render_instance_buffer_finish had not been called before drawing"); + + drw_update_view(); + + drw_state_set(pass->state); + + DRW_stats_query_start(pass->name); + + for (DRWShadingGroup *shgroup = start_group; shgroup; shgroup = shgroup->next) { + draw_shgroup(shgroup, pass->state); + /* break if upper limit */ + if (shgroup == end_group) { + break; + } + } + + /* Clear Bound textures */ + for (int i = 0; i < GPU_max_textures(); i++) { + if (DST.RST.bound_texs[i] != NULL) { + GPU_texture_unbind(DST.RST.bound_texs[i]); + DST.RST.bound_texs[i] = NULL; + } + } + + /* Clear Bound Ubos */ + for (int i = 0; i < GPU_max_ubo_binds(); i++) { + if (DST.RST.bound_ubos[i] != NULL) { + GPU_uniformbuffer_unbind(DST.RST.bound_ubos[i]); + DST.RST.bound_ubos[i] = NULL; + } + } + + if (DST.shader) { + GPU_shader_unbind(); + DST.shader = NULL; + } + + DRW_stats_query_end(); +} + +void DRW_draw_pass(DRWPass *pass) +{ + drw_draw_pass_ex(pass, pass->shgroups.first, pass->shgroups.last); +} + +/* Draw only a subset of shgroups. Used in special situations as grease pencil strokes */ +void DRW_draw_pass_subset(DRWPass *pass, DRWShadingGroup *start_group, DRWShadingGroup *end_group) +{ + drw_draw_pass_ex(pass, start_group, end_group); +} + +/** \} */ |