Stefan Dösinger : wined3d: Implement clipplanes in the ARB backend.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 2afcb794f2c6cb72fce8167aef385030df63e534
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=2afcb794f2c6cb72fce8167aef...

Author: Stefan Dösinger 
Date:   Tue May 26 22:09:36 2009 +0200

wined3d: Implement clipplanes in the ARB backend.

Using GL_NV_vertex_program2_option so far. If we're really desparate we can
handle some cases without the extension by using a custom varying and texkill
in the fragment program.

---

dlls/wined3d/arb_program_shader.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/dlls/wined3d/arb_program_shader.c b/dlls/wined3d/arb_program_shader.c
index b27d4bf..f977583 100644
--- a/dlls/wined3d/arb_program_shader.c
+++ b/dlls/wined3d/arb_program_shader.c
@@ -389,6 +389,7 @@ static void shader_generate_arb_declarations(IWineD3DBaseShader *iface, const sh
     } else {
         if(This->baseShader.reg_maps.usesrelconstF) {
             max_constantsF = GL_LIMITS(vshader_constantsF) - reserved_vs_const(iface, gl_info);
+            if(GL_SUPPORT(NV_VERTEX_PROGRAM2_OPTION)) max_constantsF -= GL_LIMITS(clipplanes);
         } else {
             max_constantsF = GL_LIMITS(vshader_constantsF) - 1;
         }
@@ -2294,6 +2295,7 @@ static GLuint shader_arb_generate_vshader(IWineD3DVertexShaderImpl *This,
     GLuint ret;
     DWORD *lconst_map = local_const_mapping((IWineD3DBaseShaderImpl *) This);
     struct shader_arb_ctx_priv priv_ctx;
+    unsigned int i;

memset(&priv_ctx, 0, sizeof(priv_ctx));
     priv_ctx.cur_vs_args = args;
@@ -2380,6 +2382,14 @@ static GLuint shader_arb_generate_vshader(IWineD3DVertexShaderImpl *This,
     shader_addline(buffer, "ADD TMP_OUT.x, TMP_OUT.x, TA.z;\n");
     shader_addline(buffer, "MAD TMP_OUT.y, TMP_OUT.y, posFixup.y, TA.w;\n");

+    if(priv_ctx.target_version >= NV2)
+    {
+        for(i = 0; i < GL_LIMITS(clipplanes); i++)
+        {
+            shader_addline(buffer, "DP4 result.clip[%u].x, TMP_OUT, state.clip[%u].plane;\n", i, i);
+        }
+    }
+
     /* Z coord [0;1]->[-1;1] mapping, see comment in transform_projection in state.c
      * and the glsl equivalent
      */
@@ -2776,7 +2786,7 @@ static void shader_arb_get_caps(WINED3DDEVTYPE devtype, const WineD3D_GL_Info *g
         pCaps->MaxPixelShaderConst = GL_LIMITS(pshader_constantsF);
     }

-    pCaps->VSClipping = FALSE; /* TODO: GL_NV_vertex_program2_option provides this */
+    pCaps->VSClipping = GL_SUPPORT(NV_VERTEX_PROGRAM2_OPTION);
 }

static BOOL shader_arb_color_fixup_supported(struct color_fixup_desc fixup)