mesa: add/update comments in _mesa_copy_buffer_subdata()

[mesa.git] / src / mesa / drivers / dri / i965 / brw_context.c

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 531ce5bd0d802b0a42f24080064ebd44627983dd..48c141c9c2e7a3d681b087aa5e3aeeb344148eab 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -109,7 +109,8 @@ static void brwPrepareExecBegin(struct gl_context *ctx)
    }
 }
 
-static void brwInitDriverFunctions( struct dd_function_table *functions )
+static void brwInitDriverFunctions(struct intel_screen *screen,
+                                  struct dd_function_table *functions)
 {
    intelInitDriverFunctions( functions );
 
@@ -117,6 +118,12 @@ static void brwInitDriverFunctions( struct dd_function_table *functions )
    brw_init_queryobj_functions(functions);
 
    functions->PrepareExecBegin = brwPrepareExecBegin;
+   functions->BeginTransformFeedback = brw_begin_transform_feedback;
+
+   if (screen->gen >= 7)
+      functions->EndTransformFeedback = gen7_end_transform_feedback;
+   else
+      functions->EndTransformFeedback = brw_end_transform_feedback;
 }
 
 bool
@@ -125,6 +132,8 @@ brwCreateContext(int api,
                 __DRIcontext *driContextPriv,
                 void *sharedContextPrivate)
 {
+   __DRIscreen *sPriv = driContextPriv->driScreenPriv;
+   struct intel_screen *screen = sPriv->driverPrivate;
    struct dd_function_table functions;
    struct brw_context *brw = rzalloc(NULL, struct brw_context);
    struct intel_context *intel = &brw->intel;
@@ -136,7 +145,7 @@ brwCreateContext(int api,
       return false;
    }
 
-   brwInitDriverFunctions( &functions );
+   brwInitDriverFunctions(screen, &functions);
 
    if (!intelInitContext( intel, api, mesaVis, driContextPriv,
                          sharedContextPrivate, &functions )) {
@@ -147,6 +156,8 @@ brwCreateContext(int api,
 
    brwInitVtbl( brw );
 
+   brw_init_surface_formats(brw);
+
    /* Initialize swrast, tnl driver tables: */
    intelInitSpanFuncs(ctx);
 
@@ -157,7 +168,7 @@ brwCreateContext(int api,
    ctx->Const.MaxTextureCoordUnits = 8; /* Mesa limit */
    ctx->Const.MaxTextureUnits = MIN2(ctx->Const.MaxTextureCoordUnits,
                                      ctx->Const.MaxTextureImageUnits);
-   ctx->Const.MaxVertexTextureImageUnits = 0; /* no vertex shader textures */
+   ctx->Const.MaxVertexTextureImageUnits = BRW_MAX_TEX_UNIT;
    ctx->Const.MaxCombinedTextureImageUnits =
       ctx->Const.MaxVertexTextureImageUnits +
       ctx->Const.MaxTextureImageUnits;
@@ -176,6 +187,26 @@ brwCreateContext(int api,
    
    ctx->Const.MaxTextureMaxAnisotropy = 16.0;
 
+   /* Hardware only supports a limited number of transform feedback buffers.
+    * So we need to override the Mesa default (which is based only on software
+    * limits).
+    */
+   ctx->Const.MaxTransformFeedbackSeparateAttribs = BRW_MAX_SOL_BUFFERS;
+
+   /* On Gen6, in the worst case, we use up one binding table entry per
+    * transform feedback component (see comments above the definition of
+    * BRW_MAX_SOL_BINDINGS, in brw_context.h), so we need to advertise a value
+    * for MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS equal to
+    * BRW_MAX_SOL_BINDINGS.
+    *
+    * In "separate components" mode, we need to divide this value by
+    * BRW_MAX_SOL_BUFFERS, so that the total number of binding table entries
+    * used up by all buffers will not exceed BRW_MAX_SOL_BINDINGS.
+    */
+   ctx->Const.MaxTransformFeedbackInterleavedComponents = BRW_MAX_SOL_BINDINGS;
+   ctx->Const.MaxTransformFeedbackSeparateComponents =
+      BRW_MAX_SOL_BINDINGS / BRW_MAX_SOL_BUFFERS;
+
    /* if conformance mode is set, swrast can handle any size AA point */
    ctx->Const.MaxPointSizeAA = 255.0;
 
@@ -282,13 +313,16 @@ brwCreateContext(int api,
         brw->max_gs_threads = 60;
         brw->urb.size = 64;            /* volume 5c.5 section 5.1 */
         brw->urb.max_vs_entries = 256; /* volume 2a (see 3DSTATE_URB) */
+        brw->urb.max_gs_entries = 256;
       } else {
         brw->max_wm_threads = 40;
         brw->max_vs_threads = 24;
         brw->max_gs_threads = 21; /* conservative; 24 if rendering disabled */
         brw->urb.size = 32;            /* volume 5c.5 section 5.1 */
         brw->urb.max_vs_entries = 128; /* volume 2a (see 3DSTATE_URB) */
+        brw->urb.max_gs_entries = 256;
       }
+      brw->urb.gen6_gs_previously_active = false;
    } else if (intel->gen == 5) {
       brw->urb.size = 1024;
       brw->max_vs_threads = 72;
@@ -325,6 +359,7 @@ brwCreateContext(int api,
    brw_draw_init( brw );
 
    brw->new_vs_backend = (getenv("INTEL_OLD_VS") == NULL);
+   brw->precompile = driQueryOptionb(&intel->optionCache, "shader_precompile");
 
    /* If we're using the new shader backend, we require integer uniforms
     * stored as actual integers.