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.

wined3d: Implement clipplanes in the ARB backend.
2afcb794 · Stefan Dösinger · Alexandre Julliard · 1276b090 · 2afcb794
Commit 2afcb794 authored May 26, 2009 by Stefan Dösinger Committed by Alexandre Julliard Jun 02, 2009
Hide whitespace changes
Inline Side-by-side

Showing with 11 additions and 1 deletion

arb_program_shader.c dlls/wined3d/arb_program_shader.c +11 -1

No files found.
--- 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)