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GL: Require a minimum of 8 ssbo slot per shader stage

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Otherwise we disable this feature. This is because some driver
does not support any vertex storage buffers but still support
8 ssbo in fragment shader.
This commit is contained in:
Clément Foucault
2022-09-06 11:07:29 +02:00
parent d7a67e245d
commit 397e5c5526
1 changed files with 12 additions and 1 deletions
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13
source/blender/gpu/opengl/gl_backend.cc
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@@ -527,7 +527,18 @@ void GLBackend::capabilities_init()
glGetIntegerv(GL_MAX_FRAGMENT_UNIFORM_BLOCKS, &GLContext::max_ubo_binds);
glGetIntegerv(GL_MAX_UNIFORM_BLOCK_SIZE, &GLContext::max_ubo_size);
if (GCaps.shader_storage_buffer_objects_support) {
glGetIntegerv(GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS, &GLContext::max_ssbo_binds);
GLint max_ssbo_binds;
GLContext::max_ssbo_binds = 999999;
glGetIntegerv(GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS, &max_ssbo_binds);
GLContext::max_ssbo_binds = min_ii(GLContext::max_ssbo_binds, max_ssbo_binds);
glGetIntegerv(GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS, &max_ssbo_binds);
GLContext::max_ssbo_binds = min_ii(GLContext::max_ssbo_binds, max_ssbo_binds);
glGetIntegerv(GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS, &max_ssbo_binds);
GLContext::max_ssbo_binds = min_ii(GLContext::max_ssbo_binds, max_ssbo_binds);
if (GLContext::max_ssbo_binds < 8) {
/* Does not meet our minimum requirements. */
GCaps.shader_storage_buffer_objects_support = false;
}
glGetIntegerv(GL_MAX_SHADER_STORAGE_BLOCK_SIZE, &GLContext::max_ssbo_size);
}
GLContext::base_instance_support = epoxy_has_gl_extension("GL_ARB_base_instance");