1 files changed, 244 insertions, 0 deletions
diff --git a/source/blender/draw/modes/paint_weight_mode.c b/source/blender/draw/modes/paint_weight_mode.c
new file mode 100644
index 00000000000..2b510a9a4c9
--- /dev/null
+++ b/source/blender/draw/modes/paint_weight_mode.c
@@ -0,0 +1,244 @@
+/*
+ * 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/modes/paint_weight_mode.c
+ *  \ingroup draw
+ */
+
+#include "DRW_engine.h"
+#include "DRW_render.h"
+
+/* If builtin shaders are needed */
+#include "GPU_shader.h"
+
+#include "draw_common.h"
+
+#include "draw_mode_engines.h"
+
+#include "DNA_mesh_types.h"
+#include "DNA_view3d_types.h"
+
+#include "BKE_mesh.h"
+
+extern struct GPUUniformBuffer *globals_ubo; /* draw_common.c */
+extern struct GlobalsUboStorage ts; /* draw_common.c */
+
+extern char datatoc_paint_wire_vert_glsl[];
+extern char datatoc_paint_wire_frag_glsl[];
+extern char datatoc_paint_vert_frag_glsl[];
+extern char datatoc_common_globals_lib_glsl[];
+
+/* *********** LISTS *********** */
+
+typedef struct PAINT_WEIGHT_PassList {
+	struct DRWPass *weight_faces;
+	struct DRWPass *wire_overlay;
+	struct DRWPass *face_overlay;
+	struct DRWPass *vert_overlay;
+} PAINT_WEIGHT_PassList;
+
+typedef struct PAINT_WEIGHT_StorageList {
+	struct PAINT_WEIGHT_PrivateData *g_data;
+} PAINT_WEIGHT_StorageList;
+
+typedef struct PAINT_WEIGHT_Data {
+	void *engine_type;
+	DRWViewportEmptyList *fbl;
+	DRWViewportEmptyList *txl;
+	PAINT_WEIGHT_PassList *psl;
+	PAINT_WEIGHT_StorageList *stl;
+} PAINT_WEIGHT_Data;
+
+/* *********** STATIC *********** */
+
+static struct {
+	struct GPUShader *weight_face_shader;
+	struct GPUShader *wire_overlay_shader;
+	struct GPUShader *face_overlay_shader;
+	struct GPUShader *vert_overlay_shader;
+	int actdef;
+} e_data = {NULL}; /* Engine data */
+
+typedef struct PAINT_WEIGHT_PrivateData {
+	DRWShadingGroup *fweights_shgrp;
+	DRWShadingGroup *lwire_shgrp;
+	DRWShadingGroup *face_shgrp;
+	DRWShadingGroup *vert_shgrp;
+} PAINT_WEIGHT_PrivateData;
+
+/* *********** FUNCTIONS *********** */
+
+static void PAINT_WEIGHT_engine_init(void *UNUSED(vedata))
+{
+	const DRWContextState *draw_ctx = DRW_context_state_get();
+
+	if (e_data.actdef != draw_ctx->obact->actdef) {
+		e_data.actdef = draw_ctx->obact->actdef;
+
+		BKE_mesh_batch_cache_dirty(draw_ctx->obact->data, BKE_MESH_BATCH_DIRTY_ALL);
+	}
+
+	if (!e_data.weight_face_shader) {
+		e_data.weight_face_shader = GPU_shader_get_builtin_shader(GPU_SHADER_SIMPLE_LIGHTING_SMOOTH_COLOR_ALPHA);
+	}
+
+	if (!e_data.wire_overlay_shader) {
+		e_data.wire_overlay_shader = DRW_shader_create_with_lib(
+		        datatoc_paint_wire_vert_glsl, NULL,
+		        datatoc_paint_wire_frag_glsl,
+		        datatoc_common_globals_lib_glsl, "#define WEIGHT_MODE\n");
+	}
+
+	if (!e_data.face_overlay_shader) {
+		e_data.face_overlay_shader = GPU_shader_get_builtin_shader(GPU_SHADER_3D_UNIFORM_COLOR);
+	}
+
+	if (!e_data.vert_overlay_shader) {
+		e_data.vert_overlay_shader = DRW_shader_create_with_lib(
+		        datatoc_paint_wire_vert_glsl, NULL,
+		        datatoc_paint_vert_frag_glsl,
+		        datatoc_common_globals_lib_glsl, NULL);
+	}
+}
+
+static void PAINT_WEIGHT_cache_init(void *vedata)
+{
+	PAINT_WEIGHT_PassList *psl = ((PAINT_WEIGHT_Data *)vedata)->psl;
+	PAINT_WEIGHT_StorageList *stl = ((PAINT_WEIGHT_Data *)vedata)->stl;
+	const DRWContextState *draw_ctx = DRW_context_state_get();
+	const View3D *v3d = draw_ctx->v3d;
+
+	if (!stl->g_data) {
+		/* Alloc transient pointers */
+		stl->g_data = MEM_mallocN(sizeof(*stl->g_data), __func__);
+	}
+
+	{
+		/* Create a pass */
+		psl->weight_faces = DRW_pass_create(
+		        "Weight Pass",
+		        DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_EQUAL | DRW_STATE_BLEND);
+
+		stl->g_data->fweights_shgrp = DRW_shgroup_create(e_data.weight_face_shader, psl->weight_faces);
+
+		static float light[3] = {-0.3f, 0.5f, 1.0f};
+		static float world_light = 1.0f;
+		DRW_shgroup_uniform_vec3(stl->g_data->fweights_shgrp, "light", light, 1);
+		DRW_shgroup_uniform_float(stl->g_data->fweights_shgrp, "alpha", &v3d->overlay.weight_paint_mode_opacity, 1);
+		DRW_shgroup_uniform_float(stl->g_data->fweights_shgrp, "global", &world_light, 1);
+	}
+
+	{
+		psl->wire_overlay = DRW_pass_create(
+		        "Wire Pass",
+		        DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS_EQUAL);
+
+		stl->g_data->lwire_shgrp = DRW_shgroup_create(e_data.wire_overlay_shader, psl->wire_overlay);
+	}
+
+	{
+		psl->face_overlay = DRW_pass_create(
+		        "Face Mask Pass",
+		        DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS_EQUAL | DRW_STATE_BLEND);
+
+		stl->g_data->face_shgrp = DRW_shgroup_create(e_data.face_overlay_shader, psl->face_overlay);
+
+		static float col[4] = {1.0f, 1.0f, 1.0f, 0.2f};
+		DRW_shgroup_uniform_vec4(stl->g_data->face_shgrp, "color", col, 1);
+	}
+
+	{
+		psl->vert_overlay = DRW_pass_create(
+		        "Vert Mask Pass",
+		        DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS_EQUAL);
+
+		stl->g_data->vert_shgrp = DRW_shgroup_create(e_data.vert_overlay_shader, psl->vert_overlay);
+	}
+}
+
+static void PAINT_WEIGHT_cache_populate(void *vedata, Object *ob)
+{
+	PAINT_WEIGHT_StorageList *stl = ((PAINT_WEIGHT_Data *)vedata)->stl;
+	const DRWContextState *draw_ctx = DRW_context_state_get();
+	const View3D *v3d = draw_ctx->v3d;
+
+	if ((ob->type == OB_MESH) && (ob == draw_ctx->obact)) {
+		const Mesh *me = ob->data;
+		const bool use_wire = (v3d->overlay.paint_flag & V3D_OVERLAY_PAINT_WIRE) != 0;
+		const bool use_surface = v3d->overlay.weight_paint_mode_opacity != 0.0f;
+		const bool use_face_sel = (me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0;
+		const bool use_vert_sel = (me->editflag & ME_EDIT_PAINT_VERT_SEL) != 0;
+		struct Gwn_Batch *geom;
+
+		if (use_surface) {
+			geom = DRW_cache_mesh_surface_weights_get(ob);
+			DRW_shgroup_call_add(stl->g_data->fweights_shgrp, geom, ob->obmat);
+		}
+
+		if (use_face_sel || use_wire) {
+			geom = DRW_cache_mesh_edges_paint_overlay_get(ob, use_wire, use_face_sel);
+			DRW_shgroup_call_add(stl->g_data->lwire_shgrp, geom, ob->obmat);
+		}
+
+		if (use_face_sel) {
+			geom = DRW_cache_mesh_faces_weight_overlay_get(ob);
+			DRW_shgroup_call_add(stl->g_data->face_shgrp, geom, ob->obmat);
+		}
+
+		if (use_vert_sel) {
+			geom = DRW_cache_mesh_verts_weight_overlay_get(ob);
+			DRW_shgroup_call_add(stl->g_data->vert_shgrp, geom, ob->obmat);
+		}
+	}
+}
+
+static void PAINT_WEIGHT_draw_scene(void *vedata)
+{
+	PAINT_WEIGHT_PassList *psl = ((PAINT_WEIGHT_Data *)vedata)->psl;
+
+	DRW_draw_pass(psl->weight_faces);
+	DRW_draw_pass(psl->face_overlay);
+	DRW_draw_pass(psl->wire_overlay);
+	DRW_draw_pass(psl->vert_overlay);
+}
+
+static void PAINT_WEIGHT_engine_free(void)
+{
+	DRW_SHADER_FREE_SAFE(e_data.wire_overlay_shader);
+	DRW_SHADER_FREE_SAFE(e_data.vert_overlay_shader);
+}
+
+static const DrawEngineDataSize PAINT_WEIGHT_data_size = DRW_VIEWPORT_DATA_SIZE(PAINT_WEIGHT_Data);
+
+DrawEngineType draw_engine_paint_weight_type = {
+	NULL, NULL,
+	N_("PaintWeightMode"),
+	&PAINT_WEIGHT_data_size,
+	&PAINT_WEIGHT_engine_init,
+	&PAINT_WEIGHT_engine_free,
+	&PAINT_WEIGHT_cache_init,
+	&PAINT_WEIGHT_cache_populate,
+	NULL,
+	NULL,
+	&PAINT_WEIGHT_draw_scene,
+	NULL,
+	NULL,
+};