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Gawain: Modify batch draw function to work with ranges.

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This enables to draw the same vbo but only with a selected range. (useful for selection with instancing/batching)
This commit is contained in:
Clément Foucault
2018-01-09 13:37:28 +01:00
parent 83e84b2c2c
commit b300fa4923
4 changed files with 24 additions and 19 deletions
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4
intern/gawain/gawain/gwn_batch.h
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@@ -86,8 +86,8 @@ void GWN_batch_draw(Gwn_Batch*);
// clement : temp stuff
void GWN_batch_draw_stupid(Gwn_Batch*);
void GWN_batch_draw_stupid_instanced(Gwn_Batch*, unsigned int instance_vbo, int instance_count,
void GWN_batch_draw_stupid(Gwn_Batch*, int v_first, int v_count);
void GWN_batch_draw_stupid_instanced(Gwn_Batch*, unsigned int instance_vbo, int instance_first, int instance_count,
int attrib_nbr, int attrib_stride, int attrib_loc[16], int attrib_size[16]);
void GWN_batch_draw_stupid_instanced_with_batch(Gwn_Batch*, Gwn_Batch*);

31
intern/gawain/src/gwn_batch.c
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@@ -118,7 +118,7 @@ void GWN_batch_program_unset(Gwn_Batch* batch)
batch->program_in_use = false;
}
static void Batch_update_program_bindings(Gwn_Batch* batch)
static void Batch_update_program_bindings(Gwn_Batch* batch, unsigned int v_first)
{
// disable all as a precaution
// why are we not using prev_attrib_enabled_bits?? see immediate.c
@@ -142,7 +142,7 @@ static void Batch_update_program_bindings(Gwn_Batch* batch)
{
const Gwn_VertAttr* a = format->attribs + a_idx;
const GLvoid* pointer = (const GLubyte*)0 + a->offset;
const GLvoid* pointer = (const GLubyte*)0 + a->offset + v_first * stride;
for (unsigned n_idx = 0; n_idx < a->name_ct; ++n_idx)
{
@@ -284,7 +284,7 @@ void GWN_batch_draw(Gwn_Batch* batch)
Batch_prime(batch);
if (batch->program_dirty)
Batch_update_program_bindings(batch);
Batch_update_program_bindings(batch, 0);
GWN_batch_program_use_begin(batch);
@@ -313,7 +313,7 @@ void GWN_batch_draw(Gwn_Batch* batch)
// clement : temp stuff
void GWN_batch_draw_stupid(Gwn_Batch* batch)
void GWN_batch_draw_stupid(Gwn_Batch* batch, int v_first, int v_count)
{
if (batch->vao_id)
glBindVertexArray(batch->vao_id);
@@ -321,34 +321,39 @@ void GWN_batch_draw_stupid(Gwn_Batch* batch)
Batch_prime(batch);
if (batch->program_dirty)
Batch_update_program_bindings(batch);
Batch_update_program_bindings(batch, v_first);
// GWN_batch_program_use_begin(batch);
//gpuBindMatrices(batch->program);
// Infer lenght if vertex count is not given
if (v_count == 0) {
v_count = (batch->elem) ? batch->elem->index_ct : batch->verts[0]->vertex_ct;
}
if (batch->elem)
{
const Gwn_IndexBuf* el = batch->elem;
#if GWN_TRACK_INDEX_RANGE
if (el->base_index)
glDrawRangeElementsBaseVertex(batch->gl_prim_type, el->min_index, el->max_index, el->index_ct, el->gl_index_type, 0, el->base_index);
glDrawRangeElementsBaseVertex(batch->gl_prim_type, el->min_index, el->max_index, v_count, el->gl_index_type, 0, el->base_index);
else
glDrawRangeElements(batch->gl_prim_type, el->min_index, el->max_index, el->index_ct, el->gl_index_type, 0);
glDrawRangeElements(batch->gl_prim_type, el->min_index, el->max_index, v_count, el->gl_index_type, 0);
#else
glDrawElements(batch->gl_prim_type, el->index_ct, GL_UNSIGNED_INT, 0);
glDrawElements(batch->gl_prim_type, v_count, GL_UNSIGNED_INT, 0);
#endif
}
else
glDrawArrays(batch->gl_prim_type, 0, batch->verts[0]->vertex_ct);
glDrawArrays(batch->gl_prim_type, 0, v_count);
// GWN_batch_program_use_end(batch);
glBindVertexArray(0);
}
// clement : temp stuff
void GWN_batch_draw_stupid_instanced(Gwn_Batch* batch, unsigned int instance_vbo, int instance_count,
void GWN_batch_draw_stupid_instanced(Gwn_Batch* batch, unsigned int instance_vbo, int instance_first, int instance_count,
int attrib_nbr, int attrib_stride, int attrib_size[16], int attrib_loc[16])
{
if (batch->vao_id)
@@ -357,10 +362,10 @@ void GWN_batch_draw_stupid_instanced(Gwn_Batch* batch, unsigned int instance_vbo
Batch_prime(batch);
if (batch->program_dirty)
Batch_update_program_bindings(batch);
Batch_update_program_bindings(batch, 0);
glBindBuffer(GL_ARRAY_BUFFER, instance_vbo);
int ptr_ofs = 0;
int ptr_ofs = instance_first * attrib_stride;
for (int i = 0; i < attrib_nbr; ++i)
{
int size = attrib_size[i];
@@ -412,7 +417,7 @@ void GWN_batch_draw_stupid_instanced_with_batch(Gwn_Batch* batch_instanced, Gwn_
Batch_prime(batch_instanced);
if (batch_instanced->program_dirty)
Batch_update_program_bindings(batch_instanced);
Batch_update_program_bindings(batch_instanced, 0);
Gwn_VertBuf* verts = batch_instancing->verts[0];

4
source/blender/draw/intern/draw_manager.c
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@@ -1856,11 +1856,11 @@ static void draw_geometry_execute(DRWShadingGroup *shgroup, Gwn_Batch *geom)
}
else if (interface->instance_vbo) {
GWN_batch_draw_stupid_instanced(
geom, interface->instance_vbo, interface->instance_count, interface->attribs_count,
geom, interface->instance_vbo, 0, interface->instance_count, interface->attribs_count,
interface->attribs_stride, interface->attribs_size, interface->attribs_loc);
}
else {
GWN_batch_draw_stupid(geom);
GWN_batch_draw_stupid(geom, 0, 0);
}
/* XXX this just tells gawain we are done with the shader.
* This does not unbind the shader. */

4
source/blender/gpu/intern/gpu_compositing.c
View File

@@ -1007,7 +1007,7 @@ bool GPU_fx_do_composite_pass(
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* the draw call we all waited for, draw a point per pixel, scaled per circle of confusion */
GWN_batch_draw_stupid_instanced(fx->point_batch, 0, fx->dof_downsampled_w * fx->dof_downsampled_h, 0, 0, NULL, NULL);
GWN_batch_draw_stupid_instanced(fx->point_batch, 0, fx->dof_downsampled_w * fx->dof_downsampled_h, 0, 0, 0, NULL, NULL);
GPU_texture_unbind(fx->dof_half_downsampled_far);
GPU_framebuffer_texture_detach(fx->dof_far_blur);
@@ -1023,7 +1023,7 @@ bool GPU_fx_do_composite_pass(
/* have to clear the buffer unfortunately */
glClear(GL_COLOR_BUFFER_BIT);
/* the draw call we all waited for, draw a point per pixel, scaled per circle of confusion */
GWN_batch_draw_stupid_instanced(fx->point_batch, 0, fx->dof_downsampled_w * fx->dof_downsampled_h, 0, 0, NULL, NULL);
GWN_batch_draw_stupid_instanced(fx->point_batch, 0, fx->dof_downsampled_w * fx->dof_downsampled_h, 0, 0, 0, NULL, NULL);
GWN_batch_program_use_end(fx->point_batch);
/* disable bindings */