=?UTF-8?Q?J=C3=B3zef=20Kucia=20?=: wined3d: Allow draw calls without color attachments.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 53f4cc1a9eef9708e8b4d537d745161222242a74
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=53f4cc1a9eef9708e8b4d537d745161222242a74

Author: Józef Kucia <jkucia at codeweavers.com>
Date:   Tue Mar 22 13:41:48 2016 +0100

wined3d: Allow draw calls without color attachments.

Signed-off-by: Józef Kucia <jkucia at codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/wined3d/context.c         |  2 +-
 dlls/wined3d/state.c           | 50 ++++++++++++++++++++++++++++--------------
 dlls/wined3d/wined3d_private.h |  2 +-
 3 files changed, 36 insertions(+), 18 deletions(-)

diff --git a/dlls/wined3d/context.c b/dlls/wined3d/context.c
index e372eaa..31fd22a 100644
--- a/dlls/wined3d/context.c
+++ b/dlls/wined3d/context.c
@@ -2675,7 +2675,7 @@ void context_state_fb(struct wined3d_context *context, const struct wined3d_stat
             }
             context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets,
                     wined3d_rendertarget_view_get_surface(fb->depth_stencil),
-                    fb->render_targets[0]->resource->draw_binding,
+                    fb->render_targets[0] ? fb->render_targets[0]->resource->draw_binding : 0,
                     fb->depth_stencil ? fb->depth_stencil->resource->draw_binding : 0);
         }
     }
diff --git a/dlls/wined3d/state.c b/dlls/wined3d/state.c
index ec49d56..70f053b 100644
--- a/dlls/wined3d/state.c
+++ b/dlls/wined3d/state.c
@@ -367,11 +367,20 @@ static GLenum gl_blend_factor(enum wined3d_blend factor, const struct wined3d_fo
 
 static void state_blend(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
 {
-    const struct wined3d_format *rt_format = state->fb->render_targets[0]->format;
-    unsigned int rt_fmt_flags = state->fb->render_targets[0]->format_flags;
     const struct wined3d_gl_info *gl_info = context->gl_info;
-    GLenum srcBlend, dstBlend;
+    const struct wined3d_format *rt_format;
     enum wined3d_blend d3d_blend;
+    GLenum srcBlend, dstBlend;
+    unsigned int rt_fmt_flags;
+
+    if (!state->fb->render_targets[0])
+    {
+        gl_info->gl_ops.gl.p_glDisable(GL_BLEND);
+        return;
+    }
+
+    rt_format = state->fb->render_targets[0]->format;
+    rt_fmt_flags = state->fb->render_targets[0]->format_flags;
 
     /* According to the red book, GL_LINE_SMOOTH needs GL_BLEND with specific
      * blending parameters to work. */
@@ -4544,31 +4553,40 @@ static void vertexdeclaration(struct wined3d_context *context, const struct wine
 
 static void viewport_miscpart(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
 {
+    const struct wined3d_rendertarget_view *depth_stencil = state->fb->depth_stencil;
     const struct wined3d_rendertarget_view *target = state->fb->render_targets[0];
     const struct wined3d_gl_info *gl_info = context->gl_info;
     struct wined3d_viewport vp = state->viewport;
+    unsigned int width, height;
+
+    if (target)
+    {
+        if (vp.width > target->width)
+            vp.width = target->width;
+        if (vp.height > target->height)
+            vp.height = target->height;
 
-    if (vp.width > target->width)
-        vp.width = target->width;
-    if (vp.height > target->height)
-        vp.height = target->height;
+        surface_get_drawable_size(wined3d_rendertarget_view_get_surface(target), context, &width, &height);
+    }
+    else if (depth_stencil)
+    {
+        width = depth_stencil->width;
+        height = depth_stencil->height;
+    }
+    else
+    {
+        FIXME("No attachments draw calls not supported.\n");
+        return;
+    }
 
     gl_info->gl_ops.gl.p_glDepthRange(vp.min_z, vp.max_z);
     checkGLcall("glDepthRange");
     /* Note: GL requires lower left, DirectX supplies upper left. This is
      * reversed when using offscreen rendering. */
     if (context->render_offscreen)
-    {
         gl_info->gl_ops.gl.p_glViewport(vp.x, vp.y, vp.width, vp.height);
-    }
     else
-    {
-        UINT width, height;
-
-        surface_get_drawable_size(wined3d_rendertarget_view_get_surface(target), context, &width, &height);
-        gl_info->gl_ops.gl.p_glViewport(vp.x, (height - (vp.y + vp.height)),
-                vp.width, vp.height);
-    }
+        gl_info->gl_ops.gl.p_glViewport(vp.x, (height - (vp.y + vp.height)), vp.width, vp.height);
     checkGLcall("glViewport");
 }
 
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 48d21d3..feb86d1 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -3431,7 +3431,7 @@ static inline BOOL needs_srgb_write(const struct wined3d_context *context,
 {
     return (!(context->d3d_info->wined3d_creation_flags & WINED3D_SRGB_READ_WRITE_CONTROL)
             || state->render_states[WINED3D_RS_SRGBWRITEENABLE])
-            && fb->render_targets[0]->format_flags & WINED3DFMT_FLAG_SRGB_WRITE;
+            && fb->render_targets[0] && fb->render_targets[0]->format_flags & WINED3DFMT_FLAG_SRGB_WRITE;
 }
 
 /* The WNDCLASS-Name for the fake window which we use to retrieve the GL capabilities */