[Mesa-dev] [PATCH v2 4/5] mesa/util: add allow_glsl_relaxed_es driconfig override
Dave Airlie
airlied at gmail.com
Tue Jun 19 07:05:48 UTC 2018
On 14 June 2018 at 11:00, Timothy Arceri <tarceri at itsqueeze.com> wrote:
> 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.
> ---
> src/compiler/glsl/builtin_functions.cpp | 3 ++-
> src/compiler/glsl/linker.cpp | 22 +++++++++++--------
> .../auxiliary/pipe-loader/driinfo_gallium.h | 1 +
> src/gallium/include/state_tracker/st_api.h | 1 +
> src/gallium/state_trackers/dri/dri_screen.c | 2 ++
> src/mesa/main/mtypes.h | 6 +++++
> src/mesa/state_tracker/st_extensions.c | 3 +++
> src/util/xmlpool/t_options.h | 5 +++++
> 8 files changed, 33 insertions(+), 10 deletions(-)
>
> diff --git a/src/compiler/glsl/builtin_functions.cpp b/src/compiler/glsl/builtin_functions.cpp
> index efe90346d0e..7119903795f 100644
> --- a/src/compiler/glsl/builtin_functions.cpp
> +++ b/src/compiler/glsl/builtin_functions.cpp
> @@ -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
> diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
> index e4bf634abe8..487a1ffcb05 100644
> --- a/src/compiler/glsl/linker.cpp
> +++ b/src/compiler/glsl/linker.cpp
> @@ -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) {
Did a bit go missing here?
Dave.
> 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;
>
> diff --git a/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h b/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
> index f25f2080080..90dbf658a6d 100644
> --- a/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
> +++ b/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
> @@ -24,6 +24,7 @@ DRI_CONF_SECTION_DEBUG
> DRI_CONF_FORCE_GLSL_VERSION(0)
> DRI_CONF_ALLOW_GLSL_EXTENSION_DIRECTIVE_MIDSHADER("false")
> DRI_CONF_ALLOW_GLSL_BUILTIN_CONST_EXPRESSION("false")
> + DRI_CONF_ALLOW_GLSL_RELAXED_ES("false")
> DRI_CONF_ALLOW_GLSL_BUILTIN_VARIABLE_REDECLARATION("false")
> DRI_CONF_ALLOW_GLSL_CROSS_STAGE_INTERPOLATION_MISMATCH("false")
> DRI_CONF_ALLOW_HIGHER_COMPAT_VERSION("false")
> diff --git a/src/gallium/include/state_tracker/st_api.h b/src/gallium/include/state_tracker/st_api.h
> index 1efc7f081d1..5b72c0afc99 100644
> --- a/src/gallium/include/state_tracker/st_api.h
> +++ b/src/gallium/include/state_tracker/st_api.h
> @@ -223,6 +223,7 @@ struct st_config_options
> unsigned force_glsl_version;
> boolean allow_glsl_extension_directive_midshader;
> boolean allow_glsl_builtin_const_expression;
> + boolean allow_glsl_relaxed_es;
> boolean allow_glsl_builtin_variable_redeclaration;
> boolean allow_higher_compat_version;
> boolean glsl_zero_init;
> diff --git a/src/gallium/state_trackers/dri/dri_screen.c b/src/gallium/state_trackers/dri/dri_screen.c
> index a86b7519364..6228425d9a2 100644
> --- a/src/gallium/state_trackers/dri/dri_screen.c
> +++ b/src/gallium/state_trackers/dri/dri_screen.c
> @@ -76,6 +76,8 @@ dri_fill_st_options(struct dri_screen *screen)
> driQueryOptionb(optionCache, "allow_glsl_extension_directive_midshader");
> options->allow_glsl_builtin_const_expression =
> driQueryOptionb(optionCache, "allow_glsl_builtin_const_expression");
> + options->allow_glsl_relaxed_es =
> + driQueryOptionb(optionCache, "allow_glsl_relaxed_es");
> options->allow_glsl_builtin_variable_redeclaration =
> driQueryOptionb(optionCache, "allow_glsl_builtin_variable_redeclaration");
> options->allow_higher_compat_version =
> diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
> index 41ad783d4b1..2c83d5e321f 100644
> --- a/src/mesa/main/mtypes.h
> +++ b/src/mesa/main/mtypes.h
> @@ -3722,6 +3722,12 @@ struct gl_constants
> */
> GLboolean AllowGLSLBuiltinConstantExpression;
>
> + /**
> + * Allow some relaxation of GLSL ES shader restrictions. This encompasses
> + * a number of relaxations to the ES shader rules.
> + */
> + GLboolean AllowGLSLRelaxedES;
> +
> /**
> * Allow GLSL built-in variables to be redeclared verbatim
> */
> diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
> index 7f44b4a80c0..532394d7808 100644
> --- a/src/mesa/state_tracker/st_extensions.c
> +++ b/src/mesa/state_tracker/st_extensions.c
> @@ -1136,6 +1136,9 @@ void st_init_extensions(struct pipe_screen *screen,
> if (options->allow_glsl_builtin_const_expression)
> consts->AllowGLSLBuiltinConstantExpression = GL_TRUE;
>
> + if (options->allow_glsl_relaxed_es)
> + consts->AllowGLSLRelaxedES = GL_TRUE;
> +
> consts->MinMapBufferAlignment =
> screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
>
> diff --git a/src/util/xmlpool/t_options.h b/src/util/xmlpool/t_options.h
> index 1a4945d6888..f0537e965b8 100644
> --- a/src/util/xmlpool/t_options.h
> +++ b/src/util/xmlpool/t_options.h
> @@ -120,6 +120,11 @@ DRI_CONF_OPT_BEGIN_B(allow_glsl_builtin_const_expression, def) \
> DRI_CONF_DESC(en,gettext("Allow builtins as part of constant expressions")) \
> DRI_CONF_OPT_END
>
> +#define DRI_CONF_ALLOW_GLSL_RELAXED_ES(def) \
> +DRI_CONF_OPT_BEGIN_B(allow_glsl_relaxed_es, def) \
> + DRI_CONF_DESC(en,gettext("Allow some relaxation of GLSL ES shader restrictions")) \
> +DRI_CONF_OPT_END
> +
> #define DRI_CONF_ALLOW_GLSL_BUILTIN_VARIABLE_REDECLARATION(def) \
> DRI_CONF_OPT_BEGIN_B(allow_glsl_builtin_variable_redeclaration, def) \
> DRI_CONF_DESC(en,gettext("Allow GLSL built-in variables to be redeclared verbatim")) \
> --
> 2.17.1
>
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