[PATCH 2/3] wined3d: Add conservative depth output information to GLSL pixel shaders.

[Józef Kucia]

From: Michael Müller <michael at fds-team.de>

Signed-off-by: Józef Kucia <jkucia at codeweavers.com>
---
 dlls/wined3d/directx.c         |  2 ++
 dlls/wined3d/glsl_shader.c     | 10 ++++++++++
 dlls/wined3d/shader.c          | 13 +++++++++++++
 dlls/wined3d/wined3d_gl.h      |  1 +
 dlls/wined3d/wined3d_private.h |  1 +
 5 files changed, 27 insertions(+)

diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index e30430a606..1174c373a9 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -115,6 +115,7 @@ static const struct wined3d_extension_map gl_extension_map[] =
     {"GL_ARB_clip_control",                 ARB_CLIP_CONTROL              },
     {"GL_ARB_color_buffer_float",           ARB_COLOR_BUFFER_FLOAT        },
     {"GL_ARB_compute_shader",               ARB_COMPUTE_SHADER            },
+    {"GL_ARB_conservative_depth",           ARB_CONSERVATIVE_DEPTH        },
     {"GL_ARB_copy_buffer",                  ARB_COPY_BUFFER               },
     {"GL_ARB_debug_output",                 ARB_DEBUG_OUTPUT              },
     {"GL_ARB_depth_buffer_float",           ARB_DEPTH_BUFFER_FLOAT        },
@@ -3874,6 +3875,7 @@ static BOOL wined3d_adapter_init_gl_caps(struct wined3d_adapter *adapter,
         {ARB_ES2_COMPATIBILITY,            MAKEDWORD_VERSION(4, 1)},
         {ARB_VIEWPORT_ARRAY,               MAKEDWORD_VERSION(4, 1)},
 
+        {ARB_CONSERVATIVE_DEPTH,           MAKEDWORD_VERSION(4, 2)},
         {ARB_INTERNALFORMAT_QUERY,         MAKEDWORD_VERSION(4, 2)},
         {ARB_MAP_BUFFER_ALIGNMENT,         MAKEDWORD_VERSION(4, 2)},
         {ARB_SHADER_ATOMIC_COUNTERS,       MAKEDWORD_VERSION(4, 2)},
diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index efcd383f13..39d22767d9 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -7244,6 +7244,8 @@ static GLuint shader_glsl_generate_pshader(const struct wined3d_context *context
     shader_glsl_add_version_declaration(buffer, gl_info);
 
     shader_glsl_enable_extensions(buffer, gl_info);
+    if (gl_info->supported[ARB_CONSERVATIVE_DEPTH])
+        shader_addline(buffer, "#extension GL_ARB_conservative_depth : enable\n");
     if (gl_info->supported[ARB_DERIVATIVE_CONTROL])
         shader_addline(buffer, "#extension GL_ARB_derivative_control : enable\n");
     if (shader_glsl_use_explicit_attrib_location(gl_info))
@@ -7262,6 +7264,14 @@ static GLuint shader_glsl_generate_pshader(const struct wined3d_context *context
     /* Base Declarations */
     shader_generate_glsl_declarations(context, buffer, shader, reg_maps, &priv_ctx);
 
+    if (gl_info->supported[ARB_CONSERVATIVE_DEPTH])
+    {
+        if (shader->u.ps.depth_output == WINED3DSPR_DEPTHOUTGE)
+            shader_addline(buffer, "layout (depth_greater) out float gl_FragDepth;\n");
+        else if (shader->u.ps.depth_output == WINED3DSPR_DEPTHOUTLE)
+            shader_addline(buffer, "layout (depth_less) out float gl_FragDepth;\n");
+    }
+
     /* Declare uniforms for NP2 texcoord fixup:
      * This is NOT done inside the loop that declares the texture samplers
      * since the NP2 fixup code is currently only used for the GeforceFX
diff --git a/dlls/wined3d/shader.c b/dlls/wined3d/shader.c
index 70c6de9f1d..02880b0339 100644
--- a/dlls/wined3d/shader.c
+++ b/dlls/wined3d/shader.c
@@ -1148,6 +1148,19 @@ static HRESULT shader_get_registers_used(struct wined3d_shader *shader, const st
                 FIXME("Invalid instruction %#x for shader type %#x.\n",
                         ins.handler_idx, shader_version.type);
         }
+        else if (ins.handler_idx == WINED3DSIH_DCL_OUTPUT)
+        {
+            if (ins.declaration.dst.reg.type == WINED3DSPR_DEPTHOUT
+                    || ins.declaration.dst.reg.type == WINED3DSPR_DEPTHOUTGE
+                    || ins.declaration.dst.reg.type == WINED3DSPR_DEPTHOUTLE)
+            {
+                if (shader_version.type == WINED3D_SHADER_TYPE_PIXEL)
+                    shader->u.ps.depth_output = ins.declaration.dst.reg.type;
+                else
+                    FIXME("Invalid instruction %#x for shader type %#x.\n",
+                            ins.handler_idx, shader_version.type);
+            }
+        }
         else if (ins.handler_idx == WINED3DSIH_DCL_OUTPUT_CONTROL_POINT_COUNT)
         {
             if (shader_version.type == WINED3D_SHADER_TYPE_HULL)
diff --git a/dlls/wined3d/wined3d_gl.h b/dlls/wined3d/wined3d_gl.h
index 8b25220cd4..2a51a7edd7 100644
--- a/dlls/wined3d/wined3d_gl.h
+++ b/dlls/wined3d/wined3d_gl.h
@@ -49,6 +49,7 @@ enum wined3d_gl_extension
     ARB_CLIP_CONTROL,
     ARB_COLOR_BUFFER_FLOAT,
     ARB_COMPUTE_SHADER,
+    ARB_CONSERVATIVE_DEPTH,
     ARB_COPY_BUFFER,
     ARB_DEBUG_OUTPUT,
     ARB_DEPTH_BUFFER_FLOAT,
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 603b3cf12c..3fbd35dced 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -3906,6 +3906,7 @@ struct wined3d_pixel_shader
     DWORD color0_reg;
 
     BOOL force_early_depth_stencil;
+    enum wined3d_shader_register_type depth_output;
 };
 
 struct wined3d_compute_shader
-- 
2.13.5