mesa/cs: Implement MAX_COMPUTE_WORK_GROUP_COUNT constant.

v2: Document that the 3-element array MaxComputeWorkGroupCount is
indexed by dimension.

Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>

3 files changed, 12 insertions, 0 deletions

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 4cf86bc5150..f2f9bb3ed5c 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -702,6 +702,9 @@ _mesa_init_constants(struct gl_context *ctx)
    ctx->Const.MaxVertexAttribBindings = MAX_VERTEX_GENERIC_ATTRIBS;
 
    /* GL_ARB_compute_shader */
+   ctx->Const.MaxComputeWorkGroupCount[0] = 65535;
+   ctx->Const.MaxComputeWorkGroupCount[1] = 65535;
+   ctx->Const.MaxComputeWorkGroupCount[2] = 65535;
    ctx->Const.MaxComputeWorkGroupSize[0] = 1024;
    ctx->Const.MaxComputeWorkGroupSize[1] = 1024;
    ctx->Const.MaxComputeWorkGroupSize[2] = 64;
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 2833a15a433..32aa7364a91 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1929,6 +1929,14 @@ find_value_indexed(const char *func, GLenum pname, GLuint index, union value *v)
       v->value_int = ctx->ImageUnits[index].Format;
       return TYPE_INT;
 
+   case GL_MAX_COMPUTE_WORK_GROUP_COUNT:
+      if (!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_compute_shader)
+         goto invalid_enum;
+      if (index >= 3)
+         goto invalid_value;
+      v->value_int = ctx->Const.MaxComputeWorkGroupCount[index];
+      return TYPE_INT;
+
    case GL_MAX_COMPUTE_WORK_GROUP_SIZE:
       if (!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_compute_shader)
          goto invalid_enum;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 40e2e68f2d7..bd22d5003fd 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -3380,6 +3380,7 @@ struct gl_constants
    GLuint MaxCombinedImageUniforms;
 
    /** GL_ARB_compute_shader */
+   GLuint MaxComputeWorkGroupCount[3]; /* Array of x, y, z dimensions */
    GLuint MaxComputeWorkGroupSize[3]; /* Array of x, y, z dimensions */
    GLuint MaxComputeWorkGroupInvocations;
 };