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GPU: Fix partial draw of batches with index buffers

This commit is contained in:
Clément Foucault 2018-10-01 14:52:02 +02:00
parent 781995a09c
commit 3a9ee33328
1 changed files with 19 additions and 4 deletions
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23
source/blender/gpu/intern/gpu_batch.c
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@ -528,6 +528,18 @@ static void primitive_restart_disable(void)
glDisable(GL_PRIMITIVE_RESTART);
}
static void *elem_offset(const GPUIndexBuf *el, int v_first)
{
#if GPU_TRACK_INDEX_RANGE
if (el->index_type == GPU_INDEX_U8)
return (GLubyte *)0 + v_first;
else if (el->index_type == GPU_INDEX_U16)
return (GLushort *)0 + v_first;
else
#endif
return (GLuint *)0 + v_first;
}
void GPU_batch_draw(GPUBatch *batch)
{
#if TRUST_NO_ONE
@ -547,10 +559,11 @@ void GPU_batch_draw_range_ex(GPUBatch *batch, int v_first, int v_count, bool for
#if TRUST_NO_ONE
assert(!(force_instance && (batch->inst == NULL)) || v_count > 0); // we cannot infer length if force_instance
#endif
const bool do_instance = (force_instance || batch->inst);
// If using offset drawing, use the default VAO and redo bindings.
if (v_first != 0 && (do_instance || batch->elem)) {
if (v_first != 0 && do_instance) {
glBindVertexArray(GPU_vao_default());
batch_update_program_bindings(batch, v_first);
}
@ -601,6 +614,8 @@ void GPU_batch_draw_range_ex(GPUBatch *batch, int v_first, int v_count, bool for
primitive_restart_enable(el);
}
void *v_first_ofs = elem_offset(el, v_first);
#if GPU_TRACK_INDEX_RANGE
if (el->base_index) {
glDrawRangeElementsBaseVertex(
@ -609,14 +624,14 @@ void GPU_batch_draw_range_ex(GPUBatch *batch, int v_first, int v_count, bool for
el->max_index,
v_count,
el->gl_index_type,
0,
v_first_ofs,
el->base_index);
}
else {
glDrawRangeElements(batch->gl_prim_type, el->min_index, el->max_index, v_count, el->gl_index_type, 0);
glDrawRangeElements(batch->gl_prim_type, el->min_index, el->max_index, v_count, el->gl_index_type, v_first_ofs);
}
#else
glDrawElements(batch->gl_prim_type, v_count, GL_UNSIGNED_INT, 0);
glDrawElements(batch->gl_prim_type, v_count, GL_UNSIGNED_INT, v_first_ofs);
#endif
if (el->use_prim_restart) {
primitive_restart_disable();