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glgsg: Gracefully degrade when using 64-bit float in OpenGL ES

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rdb 2021-02-06 19:35:08 +01:00
parent 926af198a8
commit af60f8200e
1 changed files with 44 additions and 2 deletions
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46
panda/src/glstuff/glGeomMunger_src.cxx
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@ -13,6 +13,12 @@
#include "dcast.h"
#ifdef OPENGLES
#include <atomic>
static std::atomic_flag warned_downgrade_float64 = ATOMIC_FLAG_INIT;
#endif
TypeHandle CLP(GeomMunger)::_type_handle;
ALLOC_DELETED_CHAIN_DEF(CLP(GeomMunger));
@ -102,6 +108,7 @@ munge_format_impl(const GeomVertexFormat *orig,
(InternalName::get_vertex(), 3, NT_int16,
C_point, vertex_type->get_start(), vertex_type->get_column_alignment());
}
#endif // !OPENGLES
// Convert packed formats that OpenGL may not understand.
for (size_t i = 0; i < orig->get_num_columns(); ++i) {
@ -123,8 +130,25 @@ munge_format_impl(const GeomVertexFormat *orig,
column->get_contents(), column->get_start(),
column->get_column_alignment());
}
#ifdef OPENGLES
else if (column->get_numeric_type() == NT_float64) {
if (!warned_downgrade_float64.test_and_set()) {
GLCAT.warning()
<< "OpenGL ES does not support 64-bit floats; converting vertex data to 32-bit.\n";
#ifndef NDEBUG
if (vertices_float64) {
GLCAT.warning()
<< "You may want to disable vertices-float64 for better performance.\n";
}
#endif
}
PT(GeomVertexArrayFormat) array_format = new_format->modify_array(array);
array_format->add_column(column->get_name(), column->get_num_components(),
NT_float32, column->get_contents(),
column->get_start(), column->get_column_alignment());
}
#endif
}
#endif // !OPENGLES
const GeomVertexColumn *color_type = orig->get_color_column();
if (color_type != nullptr &&
@ -288,6 +312,7 @@ premunge_format_impl(const GeomVertexFormat *orig) {
(InternalName::get_vertex(), 3, NT_int16,
C_point, vertex_type->get_start(), vertex_type->get_column_alignment());
}
#endif // !OPENGLES
// Convert packed formats that OpenGL may not understand.
for (size_t i = 0; i < orig->get_num_columns(); ++i) {
@ -309,8 +334,25 @@ premunge_format_impl(const GeomVertexFormat *orig) {
column->get_contents(), column->get_start(),
column->get_column_alignment());
}
#ifdef OPENGLES
else if (column->get_numeric_type() == NT_float64) {
if (!warned_downgrade_float64.test_and_set()) {
GLCAT.warning()
<< "OpenGL ES does not support 64-bit floats; converting vertex data to 32-bit.\n";
#ifndef NDEBUG
if (vertices_float64) {
GLCAT.warning()
<< "You may want to disable vertices-float64 for better performance.\n";
}
#endif
}
PT(GeomVertexArrayFormat) array_format = new_format->modify_array(array);
array_format->add_column(column->get_name(), column->get_num_components(),
NT_float32, column->get_contents(),
column->get_start(), column->get_column_alignment());
}
#endif
}
#endif // !OPENGLES
CPT(GeomVertexFormat) format = GeomVertexFormat::register_format(new_format);