Determine GL extensions/limits by making pipe queries.

The state tracker calls pipe->get_param() to determine the GL limits and
which OpenGL extensions are supported.
This is an initial implementation that'll probably change...

3 files changed, 57 insertions, 0 deletions

diff --git a/src/mesa/pipe/i915simple/i915_context.c b/src/mesa/pipe/i915simple/i915_context.c
index 2c36a194c7..6de1e68f73 100644
--- a/src/mesa/pipe/i915simple/i915_context.c
+++ b/src/mesa/pipe/i915simple/i915_context.c
@@ -142,6 +142,26 @@ static int
 i915_get_param(struct pipe_context *pipe, int param)
 {
    switch (param) {
+   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
+      return 8;
+   case PIPE_CAP_NPOT_TEXTURES:
+      return 1;
+   case PIPE_CAP_TWO_SIDED_STENCIL:
+      return 1;
+   case PIPE_CAP_GLSL:
+      return 0;
+   case PIPE_CAP_S3TC:
+      return 0;
+   case PIPE_CAP_ANISOTROPIC_FILTER:
+      return 0;
+   case PIPE_CAP_POINT_SPRITE:
+      return 0;
+   case PIPE_CAP_MAX_RENDER_TARGETS:
+      return 1;
+   case PIPE_CAP_OCCLUSION_QUERY:
+      return 0;
+   case PIPE_CAP_TEXTURE_SHADOW_MAP:
+      return 0;
    default:
       return 0;
    }
diff --git a/src/mesa/pipe/p_defines.h b/src/mesa/pipe/p_defines.h
index 8982428636..ef79716ed9 100644
--- a/src/mesa/pipe/p_defines.h
+++ b/src/mesa/pipe/p_defines.h
@@ -225,4 +225,21 @@
 #define PIPE_SPRITE_COORD_UPPER_LEFT 1
 #define PIPE_SPRITE_COORD_LOWER_LEFT 2
 
+
+/**
+ * Implementation capabilities/limits
+ * Passed to pipe->get_param()
+ * XXX this will need some fine tuning...
+ */
+#define PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS 1
+#define PIPE_CAP_NPOT_TEXTURES           2
+#define PIPE_CAP_TWO_SIDED_STENCIL       3
+#define PIPE_CAP_GLSL                    4  /* XXX need something better */
+#define PIPE_CAP_S3TC                    5
+#define PIPE_CAP_ANISOTROPIC_FILTER      6
+#define PIPE_CAP_POINT_SPRITE            7
+#define PIPE_CAP_MAX_RENDER_TARGETS      8
+#define PIPE_CAP_OCCLUSION_QUERY         9
+#define PIPE_CAP_TEXTURE_SHADOW_MAP     10
+
 #endif
diff --git a/src/mesa/pipe/softpipe/sp_context.c b/src/mesa/pipe/softpipe/sp_context.c
index 46f591e425..effecda87e 100644
--- a/src/mesa/pipe/softpipe/sp_context.c
+++ b/src/mesa/pipe/softpipe/sp_context.c
@@ -277,6 +277,26 @@ static const char *softpipe_get_vendor( struct pipe_context *pipe )
 static int softpipe_get_param(struct pipe_context *pipe, int param)
 {
    switch (param) {
+   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
+      return 8;
+   case PIPE_CAP_NPOT_TEXTURES:
+      return 1;
+   case PIPE_CAP_TWO_SIDED_STENCIL:
+      return 1;
+   case PIPE_CAP_GLSL:
+      return 1;
+   case PIPE_CAP_S3TC:
+      return 0;
+   case PIPE_CAP_ANISOTROPIC_FILTER:
+      return 0;
+   case PIPE_CAP_POINT_SPRITE:
+      return 1;
+   case PIPE_CAP_MAX_RENDER_TARGETS:
+      return 1;
+   case PIPE_CAP_OCCLUSION_QUERY:
+      return 1;
+   case PIPE_CAP_TEXTURE_SHADOW_MAP:
+      return 1;
    default:
       return 0;
    }