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mesa/util: add allow_glsl_relaxed_es driconfig override

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This relaxes a number of ES shader restrictions allowing shaders
to follow more desktop GLSL like rules.

This initial implementation relaxes the following:

 - allows linking ES shaders with desktop shaders
 - allows mismatching precision qualifiers
 - always enables standard derivative builtins

These relaxations allow Google Earth VR shaders to compile.

Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Timothy Arceri
2018-06-14 11:00:24 +10:00
parent 781c23ece6
commit 725b1a406d
8 changed files with 33 additions and 10 deletions
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3
src/compiler/glsl/builtin_functions.cpp
View File

@@ -446,7 +446,8 @@ fs_oes_derivatives(const _mesa_glsl_parse_state *state)
{
return state->stage == MESA_SHADER_FRAGMENT &&
(state->is_version(110, 300) ||
state->OES_standard_derivatives_enable);
state->OES_standard_derivatives_enable ||
state->ctx->Const.AllowGLSLRelaxedES);
}
static bool

22
src/compiler/glsl/linker.cpp
View File

@@ -894,7 +894,7 @@ validate_intrastage_arrays(struct gl_shader_program *prog,
* Perform validation of global variables used across multiple shaders
*/
static void
cross_validate_globals(struct gl_shader_program *prog,
cross_validate_globals(struct gl_context *ctx, struct gl_shader_program *prog,
struct exec_list *ir, glsl_symbol_table *variables,
bool uniforms_only)
{
@@ -1115,7 +1115,8 @@ cross_validate_globals(struct gl_shader_program *prog,
/* Check the precision qualifier matches for uniform variables on
* GLSL ES.
*/
if (prog->IsES && !var->get_interface_type() &&
if (!ctx->Const.AllowGLSLRelaxedES &&
prog->IsES && !var->get_interface_type() &&
existing->data.precision != var->data.precision) {
if ((existing->data.used && var->data.used) || prog->data->Version >= 300) {
linker_error(prog, "declarations for %s `%s` have "
@@ -1168,15 +1169,16 @@ cross_validate_globals(struct gl_shader_program *prog,
* Perform validation of uniforms used across multiple shader stages
*/
static void
cross_validate_uniforms(struct gl_shader_program *prog)
cross_validate_uniforms(struct gl_context *ctx,
struct gl_shader_program *prog)
{
glsl_symbol_table variables;
for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
if (prog->_LinkedShaders[i] == NULL)
continue;
cross_validate_globals(prog, prog->_LinkedShaders[i]->ir, &variables,
true);
cross_validate_globals(ctx, prog, prog->_LinkedShaders[i]->ir,
&variables, true);
}
}
@@ -2210,7 +2212,8 @@ link_intrastage_shaders(void *mem_ctx,
for (unsigned i = 0; i < num_shaders; i++) {
if (shader_list[i] == NULL)
continue;
cross_validate_globals(prog, shader_list[i]->ir, &variables, false);
cross_validate_globals(ctx, prog, shader_list[i]->ir, &variables,
false);
}
if (!prog->data->LinkStatus)
@@ -4807,7 +4810,8 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
min_version = MIN2(min_version, prog->Shaders[i]->Version);
max_version = MAX2(max_version, prog->Shaders[i]->Version);
if (prog->Shaders[i]->IsES != prog->Shaders[0]->IsES) {
if (!ctx->Const.AllowGLSLRelaxedES &&
prog->Shaders[i]->IsES != prog->Shaders[0]->IsES) {
linker_error(prog, "all shaders must use same shading "
"language version\n");
goto done;
@@ -4825,7 +4829,7 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
/* In desktop GLSL, different shader versions may be linked together. In
* GLSL ES, all shader versions must be the same.
*/
if (prog->Shaders[0]->IsES && min_version != max_version) {
if (!ctx->Const.AllowGLSLRelaxedES && min_version != max_version) {
linker_error(prog, "all shaders must use same shading "
"language version\n");
goto done;
@@ -4951,7 +4955,7 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
* performed, then locations are assigned for uniforms, attributes, and
* varyings.
*/
cross_validate_uniforms(prog);
cross_validate_uniforms(ctx, prog);
if (!prog->data->LinkStatus)
goto done;