[Mesa-dev] [PATCH 03/10] mesa: add new enum MAX_UNIFORM_LOCATIONS

[Tapani Pälli]

Patch adds new implementation dependent value required by the
GL_ARB_explicit_uniform_location extension. Default value for user
assignable locations is calculated as sum of MaxUniformComponents
for each stage.

Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
---
 src/mesa/main/context.c              | 10 +++++++++-
 src/mesa/main/get.c                  |  1 +
 src/mesa/main/get_hash_params.py     |  1 +
 src/mesa/main/mtypes.h               |  5 +++++
 src/mesa/main/tests/enum_strings.cpp |  1 +
 5 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 860ae86..8b77df1 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -610,8 +610,16 @@ _mesa_init_constants(struct gl_context *ctx)
    ctx->Const.MaxUniformBlockSize = 16384;
    ctx->Const.UniformBufferOffsetAlignment = 1;
 
-   for (i = 0; i < MESA_SHADER_STAGES; i++)
+   /* GL_ARB_explicit_uniform_location, initial value calculated
+    * as sum of MaxUniformComponents for each stage.
+    */
+   ctx->Const.MaxUserAssignableUniformLocations = 0;
+
+   for (i = 0; i < MESA_SHADER_STAGES; i++) {
       init_program_limits(ctx, i, &ctx->Const.Program[i]);
+      ctx->Const.MaxUserAssignableUniformLocations +=
+         ctx->Const.Program[i].MaxUniformComponents;
+   }
 
    ctx->Const.MaxProgramMatrices = MAX_PROGRAM_MATRICES;
    ctx->Const.MaxProgramMatrixStackDepth = MAX_PROGRAM_MATRIX_STACK_DEPTH;
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 6d95790..8b50441 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -395,6 +395,7 @@ EXTRA_EXT(ARB_viewport_array);
 EXTRA_EXT(ARB_compute_shader);
 EXTRA_EXT(ARB_gpu_shader5);
 EXTRA_EXT2(ARB_transform_feedback3, ARB_gpu_shader5);
+EXTRA_EXT(ARB_explicit_uniform_location);
 
 static const int
 extra_ARB_color_buffer_float_or_glcore[] = {
diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py
index 06d0bba..5709d42 100644
--- a/src/mesa/main/get_hash_params.py
+++ b/src/mesa/main/get_hash_params.py
@@ -474,6 +474,7 @@ descriptor=[
   [ "MAX_LIST_NESTING", "CONST(MAX_LIST_NESTING), NO_EXTRA" ],
   [ "MAX_NAME_STACK_DEPTH", "CONST(MAX_NAME_STACK_DEPTH), NO_EXTRA" ],
   [ "MAX_PIXEL_MAP_TABLE", "CONST(MAX_PIXEL_MAP_TABLE), NO_EXTRA" ],
+  [ "MAX_UNIFORM_LOCATIONS", "CONTEXT_INT(Const.MaxUserAssignableUniformLocations), NO_EXTRA" ],
   [ "NAME_STACK_DEPTH", "CONTEXT_INT(Select.NameStackDepth), NO_EXTRA" ],
   [ "PACK_LSB_FIRST", "CONTEXT_BOOL(Pack.LsbFirst), NO_EXTRA" ],
   [ "PACK_SWAP_BYTES", "CONTEXT_BOOL(Pack.SwapBytes), NO_EXTRA" ],
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 7ac6bbe..fefbe06 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -3311,6 +3311,11 @@ struct gl_constants
    GLuint UniformBufferOffsetAlignment;
    /** @} */
 
+   /**
+    * GL_ARB_explicit_uniform_location
+    */
+   GLuint MaxUserAssignableUniformLocations;
+
    /** GL_ARB_geometry_shader4 */
    GLuint MaxGeometryOutputVertices;
    GLuint MaxGeometryTotalOutputComponents;
diff --git a/src/mesa/main/tests/enum_strings.cpp b/src/mesa/main/tests/enum_strings.cpp
index 3795700..298ff6a 100644
--- a/src/mesa/main/tests/enum_strings.cpp
+++ b/src/mesa/main/tests/enum_strings.cpp
@@ -787,6 +787,7 @@ const struct enum_info everything[] = {
    { 0x8256, "GL_RESET_NOTIFICATION_STRATEGY_ARB" },
    { 0x8257, "GL_PROGRAM_BINARY_RETRIEVABLE_HINT" },
    { 0x8261, "GL_NO_RESET_NOTIFICATION_ARB" },
+   { 0x826E, "GL_MAX_UNIFORM_LOCATIONS" },
    { 0x82DF, "GL_TEXTURE_IMMUTABLE_LEVELS" },
    { 0x8362, "GL_UNSIGNED_BYTE_2_3_3_REV" },
    { 0x8363, "GL_UNSIGNED_SHORT_5_6_5" },
-- 
1.9.0