=?UTF-8?Q?J=C3=B3zef=20Kucia=20?=: wined3d: Add quirk for Nvidia viewport subpixel bits bug.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6823abd521c0c12d20d9171fb5ae8b300009d082
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=6823abd521c0c12d20d9171fb5ae8b300009d082

Author: Józef Kucia <jkucia at codeweavers.com>
Date:   Mon Feb 27 13:42:00 2017 +0100

wined3d: Add quirk for Nvidia viewport subpixel bits bug.

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/directx.c         | 27 ++++++++++++++++++++++++
 dlls/wined3d/utils.c           | 47 ++++++++++++++++++++++++++++++++++++++++++
 dlls/wined3d/wined3d_private.h |  2 ++
 3 files changed, 76 insertions(+)

diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index d19b681..dbcd12a 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -914,6 +914,17 @@ static BOOL match_broken_arb_fog(const struct wined3d_gl_info *gl_info, struct w
     return data[0] != 0x00ff0000 || data[3] != 0x0000ff00;
 }
 
+static BOOL match_broken_viewport_subpixel_bits(const struct wined3d_gl_info *gl_info,
+        struct wined3d_caps_gl_ctx *ctx, const char *gl_renderer, enum wined3d_gl_vendor gl_vendor,
+        enum wined3d_pci_vendor card_vendor, enum wined3d_pci_device device)
+{
+    if (!gl_info->supported[ARB_VIEWPORT_ARRAY])
+        return FALSE;
+    if (wined3d_settings.offscreen_rendering_mode != ORM_FBO)
+        return FALSE;
+    return !wined3d_caps_gl_ctx_test_viewport_subpixel_bits(ctx);
+}
+
 static void quirk_apple_glsl_constants(struct wined3d_gl_info *gl_info)
 {
     /* MacOS needs uniforms for relative addressing offsets. This can accumulate to quite a few uniforms.
@@ -1042,6 +1053,17 @@ static void quirk_broken_arb_fog(struct wined3d_gl_info *gl_info)
     gl_info->quirks |= WINED3D_QUIRK_BROKEN_ARB_FOG;
 }
 
+static void quirk_broken_viewport_subpixel_bits(struct wined3d_gl_info *gl_info)
+{
+    TRACE("Disabling ARB_viewport_array.\n");
+    gl_info->supported[ARB_VIEWPORT_ARRAY] = FALSE;
+    if (gl_info->supported[ARB_CLIP_CONTROL])
+    {
+        TRACE("Disabling ARB_clip_control.\n");
+        gl_info->supported[ARB_CLIP_CONTROL] = FALSE;
+    }
+}
+
 struct driver_quirk
 {
     BOOL (*match)(const struct wined3d_gl_info *gl_info, struct wined3d_caps_gl_ctx *ctx,
@@ -1133,6 +1155,11 @@ static const struct driver_quirk quirk_table[] =
         quirk_broken_arb_fog,
         "ARBfp fogstart == fogend workaround"
     },
+    {
+        match_broken_viewport_subpixel_bits,
+        quirk_broken_viewport_subpixel_bits,
+        "Nvidia viewport subpixel bits bug"
+    },
 };
 
 /* Certain applications (Steam) complain if we report an outdated driver version. In general,
diff --git a/dlls/wined3d/utils.c b/dlls/wined3d/utils.c
index b076783..c392388 100644
--- a/dlls/wined3d/utils.c
+++ b/dlls/wined3d/utils.c
@@ -3509,6 +3509,53 @@ fail:
     return FALSE;
 }
 
+BOOL wined3d_caps_gl_ctx_test_viewport_subpixel_bits(struct wined3d_caps_gl_ctx *ctx)
+{
+    static const struct wined3d_color red = {1.0f, 0.0f, 0.0f, 1.0f};
+    const struct wined3d_gl_info *gl_info = ctx->gl_info;
+    static const float offset = -63.0f / 128.0f;
+    GLuint texture, fbo;
+    DWORD readback[4];
+    unsigned int i;
+
+    gl_info->gl_ops.gl.p_glGenTextures(1, &texture);
+    gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_2D, texture);
+    gl_info->gl_ops.gl.p_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
+    gl_info->gl_ops.gl.p_glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, ARRAY_SIZE(readback), 1, 0,
+            GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
+    gl_info->fbo_ops.glGenFramebuffers(1, &fbo);
+    gl_info->fbo_ops.glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    gl_info->fbo_ops.glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+            GL_TEXTURE_2D, texture, 0);
+    checkGLcall("create resources");
+
+    gl_info->gl_ops.gl.p_glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+    gl_info->gl_ops.gl.p_glClear(GL_COLOR_BUFFER_BIT);
+    GL_EXTCALL(glViewportIndexedf(0, offset, offset, 4.0f, 1.0f));
+    draw_test_quad(ctx, NULL, &red);
+    checkGLcall("draw");
+
+    gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_2D, texture);
+    gl_info->gl_ops.gl.p_glGetTexImage(GL_TEXTURE_2D, 0,
+            GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, readback);
+    checkGLcall("readback");
+
+    TRACE("Readback colors are 0x%08x, 0x%08x, 0x%08x, 0x%08x.\n",
+            readback[0], readback[1], readback[2], readback[3]);
+
+    gl_info->gl_ops.gl.p_glDeleteTextures(1, &texture);
+    gl_info->fbo_ops.glDeleteFramebuffers(1, &fbo);
+    gl_info->fbo_ops.glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    checkGLcall("delete resources");
+
+    for (i = 0; i < ARRAY_SIZE(readback); ++i)
+    {
+        if (readback[i] != 0xffff0000)
+            return FALSE;
+    }
+    return TRUE;
+}
+
 float wined3d_adapter_find_polyoffset_scale(struct wined3d_caps_gl_ctx *ctx, GLenum format)
 {
     const struct wined3d_gl_info *gl_info = ctx->gl_info;
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 611b3b6..613d1c9 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -2354,6 +2354,8 @@ BOOL wined3d_adapter_init_format_info(struct wined3d_adapter *adapter,
         struct wined3d_caps_gl_ctx *ctx) DECLSPEC_HIDDEN;
 UINT64 adapter_adjust_memory(struct wined3d_adapter *adapter, INT64 amount) DECLSPEC_HIDDEN;
 
+BOOL wined3d_caps_gl_ctx_test_viewport_subpixel_bits(struct wined3d_caps_gl_ctx *ctx) DECLSPEC_HIDDEN;
+
 void install_gl_compat_wrapper(struct wined3d_gl_info *gl_info, enum wined3d_gl_extension ext) DECLSPEC_HIDDEN;
 
 enum projection_types