1 files changed, 158 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c b/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c
new file mode 100644
index 0000000000..85451e4034
--- /dev/null
+++ b/src/gallium/state_trackers/xorg/xorg_exa_tgsi.c
@@ -0,0 +1,158 @@
+#include "xorg_exa_tgsi.h"
+
+/*### stupidity defined in X11/extensions/XI.h */
+#undef Absolute
+
+#include "pipe/p_format.h"
+#include "pipe/p_context.h"
+#include "pipe/p_state.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_shader_tokens.h"
+
+#include "util/u_memory.h"
+#include "util/u_simple_shaders.h"
+
+#include "tgsi/tgsi_ureg.h"
+
+#include "cso_cache/cso_context.h"
+
+#define UNSUPPORTED_OP 0
+
+struct shader_id {
+   int op : 8;
+   int mask : 1;
+   int component_alpha : 1;
+   int is_fill : 1;
+};
+
+/* SAMP[0]  = dst
+ * SAMP[1]  = src
+ * SAMP[2]  = mask
+ * IN[0]    = pos dst
+ * IN[1]    = pos src
+ * IN[2]    = pos mask
+ * CONST[0] = (0, 0, 0, 1)
+ */
+struct xorg_render_ops_tgsi {
+   int op;
+};
+
+
+static const char over_op[] =
+   "SUB TEMP[3], CONST[0].wwww, TEMP[1].wwww\n"
+   "MUL TEMP[3], TEMP[0], TEMP[3]\n"
+   "ADD TEMP[0], TEMP[3], TEMP[0]\n";
+
+static const struct xorg_render_ops_tgsi ops_map[] = {
+   {PictOpClear},
+   {PictOpSrc},
+   {PictOpDst},
+   {PictOpOver},
+   {PictOpOverReverse},
+   {PictOpIn},
+   {PictOpInReverse},
+   {PictOpOut},
+   {PictOpOutReverse},
+   {PictOpAtop},
+   {PictOpAtopReverse},
+   {PictOpXor},
+   {PictOpAdd},
+   {PictOpSaturate},
+};
+
+
+static INLINE void
+create_preamble(struct ureg_program *ureg)
+{
+}
+
+
+static INLINE void
+src_in_mask(struct ureg_program *ureg,
+            struct ureg_dst dst,
+            struct ureg_src src,
+            struct ureg_src mask)
+{
+   /* MUL dst, src, mask.wwww */
+   ureg_MUL(ureg, dst, src,
+            ureg_scalar(mask, TGSI_SWIZZLE_W));
+}
+
+static INLINE
+struct shader_id shader_state(int op,
+                              PicturePtr src_picture,
+                              PicturePtr mask_picture,
+                              PicturePtr dst_picture)
+{
+   struct shader_id sid;
+
+   sid.op = op;
+   sid.mask = (mask_picture != 0);
+   sid.component_alpha = (mask_picture->componentAlpha);
+   sid.is_fill = (src_picture->pSourcePict != 0);
+   if (sid.is_fill) {
+      sid.is_fill =
+         (src_picture->pSourcePict->type == SourcePictTypeSolidFill);
+   }
+
+   return sid;
+}
+
+struct xorg_shader xorg_shader_construct(struct exa_context *exa,
+                                         int op,
+                                         PicturePtr src_picture,
+                                         PicturePtr mask_picture,
+                                         PicturePtr dst_picture)
+{
+   struct ureg_program *ureg;
+   struct ureg_src dst_sampler, src_sampler, mask_sampler;
+   struct ureg_src dst_pos, src_pos, mask_pos;
+   struct ureg_src src, mask;
+   struct shader_id sid = shader_state(op, src_picture,
+                                       mask_picture,
+                                       dst_picture);
+   struct xorg_shader shader = {0};
+
+   ureg = ureg_create(TGSI_PROCESSOR_FRAGMENT);
+   if (ureg == NULL)
+      return shader;
+
+   if (sid.is_fill)
+      return shader;
+
+#if 0  /* unused right now */
+   dst_sampler = ureg_DECL_sampler(ureg);
+   dst_pos = ureg_DECL_fs_input(ureg,
+                                TGSI_SEMANTIC_POSITION,
+                                0,
+                                TGSI_INTERPOLATE_PERSPECTIVE);
+#endif
+
+   src_sampler = ureg_DECL_sampler(ureg);
+   src_pos = ureg_DECL_fs_input(ureg,
+                                TGSI_SEMANTIC_POSITION,
+                                1,
+                                TGSI_INTERPOLATE_PERSPECTIVE);
+
+   if (sid.mask) {
+      mask_sampler = ureg_DECL_sampler(ureg);
+      src_pos = ureg_DECL_fs_input(ureg,
+                                   TGSI_SEMANTIC_POSITION,
+                                   2,
+                                   TGSI_INTERPOLATE_PERSPECTIVE);
+   }
+
+   ureg_TEX(ureg, ureg_dst(src),
+            TGSI_TEXTURE_2D, src_pos, src_sampler);
+
+   if (sid.mask) {
+      ureg_TEX(ureg, ureg_dst(mask),
+               TGSI_TEXTURE_2D, mask_pos, mask_sampler);
+      /* src IN mask */
+      src_in_mask(ureg, ureg_dst(src), src, mask);
+   }
+
+   ureg_END(ureg);
+
+   return shader;
+}