From 1c1873b93b9aa30c8e9275000f813bce69ed99e4 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Fri, 20 May 2016 20:59:33 -0700 Subject: [PATCH] mesa: Implement glGet*(GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED). MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Technically, this was introduced with GL 4.4. However, I believe it was intended to be retroactive. As far as I know, AMD has never supported primitive restart with patches, while NVidia and Intel do. This necessitated the need for a query which would allow applications to figure out whether this was usable or not. I decided to expose it everywhere ARB_tessellation_shader is exposed. (It's also in both OES and EXT_tessellation_shader.) Enable this for i965 and Gallium drivers which expose the capability. v2: Fix a bug in the state_tracker code (caught by Ilia Mirkin). Bugzilla: https://cvs.khronos.org/bugzilla/show_bug.cgi?id=10364 Signed-off-by: Kenneth Graunke Reviewed-by: Ilia Mirkin Reviewed-by: Marek Olšák Reviewed-by: Ian Romanick --- src/mapi/glapi/gen/ARB_tessellation_shader.xml | 1 + src/mesa/drivers/dri/i965/brw_context.c | 1 + src/mesa/main/context.c | 1 + src/mesa/main/get_hash_params.py | 1 + src/mesa/main/mtypes.h | 1 + src/mesa/state_tracker/st_extensions.c | 2 ++ 6 files changed, 7 insertions(+) diff --git a/src/mapi/glapi/gen/ARB_tessellation_shader.xml b/src/mapi/glapi/gen/ARB_tessellation_shader.xml index 77f2228ae3b..5ffc2bad318 100644 --- a/src/mapi/glapi/gen/ARB_tessellation_shader.xml +++ b/src/mapi/glapi/gen/ARB_tessellation_shader.xml @@ -48,6 +48,7 @@ + diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c index 1ab02ae3d0f..552e5ec8925 100644 --- a/src/mesa/drivers/dri/i965/brw_context.c +++ b/src/mesa/drivers/dri/i965/brw_context.c @@ -565,6 +565,7 @@ brw_initialize_context_constants(struct brw_context *brw) ctx->Const.MaxClipPlanes = 8; ctx->Const.LowerTessLevel = true; + ctx->Const.PrimitiveRestartForPatches = true; ctx->Const.Program[MESA_SHADER_VERTEX].MaxNativeInstructions = 16 * 1024; ctx->Const.Program[MESA_SHADER_VERTEX].MaxAluInstructions = 0; diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c index f6907991c75..7c0a6ef340a 100644 --- a/src/mesa/main/context.c +++ b/src/mesa/main/context.c @@ -725,6 +725,7 @@ _mesa_init_constants(struct gl_constants *consts, gl_api api) consts->Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits = MAX_TEXTURE_IMAGE_UNITS; consts->MaxTessPatchComponents = MAX_TESS_PATCH_COMPONENTS; consts->MaxTessControlTotalOutputComponents = MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS; + consts->PrimitiveRestartForPatches = false; } diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py index 8f693acdc7c..2124072ca0c 100644 --- a/src/mesa/main/get_hash_params.py +++ b/src/mesa/main/get_hash_params.py @@ -912,6 +912,7 @@ descriptor=[ [ "MAX_TESS_EVALUATION_UNIFORM_BLOCKS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks), extra_ARB_tessellation_shader" ], [ "MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxCombinedUniformComponents), extra_ARB_tessellation_shader" ], [ "MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_EVAL].MaxCombinedUniformComponents), extra_ARB_tessellation_shader" ], + [ "PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED", "CONTEXT_BOOL(Const.PrimitiveRestartForPatches), extra_ARB_tessellation_shader" ], # Dependencies on GL_ARB_tessellation_shader [ "MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers), extra_ARB_shader_atomic_counters_and_tessellation" ], [ "MAX_TESS_CONTROL_ATOMIC_COUNTERS", "CONTEXT_INT(Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters), extra_ARB_shader_atomic_counters_and_tessellation" ], diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index f6c6d9733e1..6cd30e8c10c 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -3727,6 +3727,7 @@ struct gl_constants GLuint MaxTessPatchComponents; GLuint MaxTessControlTotalOutputComponents; bool LowerTessLevel; /**< Lower gl_TessLevel* from float[n] to vecn? */ + bool PrimitiveRestartForPatches; }; diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c index ea60e41acdc..ef061e9d756 100644 --- a/src/mesa/state_tracker/st_extensions.c +++ b/src/mesa/state_tracker/st_extensions.c @@ -314,6 +314,8 @@ void st_init_limits(struct pipe_screen *screen, } c->LowerTessLevel = true; + c->PrimitiveRestartForPatches = + screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES); c->MaxCombinedTextureImageUnits = _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits + -- 2.30.2