gallium: introduce 'pipe_screen' for context-independent functions

This will allow creating textures before a rendering context exists, for example.
Only implemented in i915 driver for now.  i915pipe->texture_create() just
dispatches through to the i915screen->texture_create() to avoid state tracker
changes for now.

1 files changed, 25 insertions, 2 deletions

diff --git a/src/gallium/drivers/i915simple/i915_strings.c b/src/gallium/drivers/i915simple/i915_strings.c
index 301fedea19..ee62bb2e5d 100644
--- a/src/gallium/drivers/i915simple/i915_strings.c
+++ b/src/gallium/drivers/i915simple/i915_strings.c
@@ -26,21 +26,31 @@
  **************************************************************************/
 
 #include "i915_context.h"
+#include "i915_screen.h"
 #include "i915_reg.h"
 
 
+/** XXX temporary screen/pipe duplication here */
+
+
+static const char *i915_get_vendor_screen( struct pipe_screen *screen )
+{
+   return "Tungsten Graphics, Inc.";
+}
+
 static const char *i915_get_vendor( struct pipe_context *pipe )
 {
    return "Tungsten Graphics, Inc.";
 }
 
 
-static const char *i915_get_name( struct pipe_context *pipe )
+static const char *i915_get_name_screen( struct pipe_screen *screen )
 {
+   struct i915_screen *i915screen = i915_screen(screen);
    static char buffer[128];
    const char *chipset;
 
-   switch (i915_context(pipe)->pci_id) {
+   switch (i915screen->pci_id) {
    case PCI_CHIP_I915_G:
       chipset = "915G";
       break;
@@ -75,9 +85,22 @@ static const char *i915_get_name( struct pipe_context *pipe )
 }
 
 
+static const char *i915_get_name( struct pipe_context *pipe )
+{
+   return pipe->screen->get_name(pipe->screen);
+}
+
+
 void
 i915_init_string_functions(struct i915_context *i915)
 {
    i915->pipe.get_name = i915_get_name;
    i915->pipe.get_vendor = i915_get_vendor;
 }
+
+void
+i915_init_screen_string_functions(struct pipe_screen *screen)
+{
+   screen->get_name = i915_get_name_screen;
+   screen->get_vendor = i915_get_vendor_screen;
+}