[PATCH 3/4] winewayland: Support WGL_ARB_pixel_format.

[Alexandros Frantzis]

From: Alexandros Frantzis

Populate wgl_pixel_format ARB attributes to enable the default
implementation of WGL_ARB_pixel_format.
---
 dlls/winewayland.drv/opengl.c | 77 +++++++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 4 deletions(-)

diff --git a/dlls/winewayland.drv/opengl.c b/dlls/winewayland.drv/opengl.c
index 3cb8b1e8a0d..e714b2cb952 100644
--- a/dlls/winewayland.drv/opengl.c
+++ b/dlls/winewayland.drv/opengl.c
@@ -707,14 +707,17 @@ static BOOL wayland_wglSwapIntervalEXT(int interval)

static void describe_pixel_format(EGLConfig config, struct wgl_pixel_format *fmt)
 {
-    EGLint value;
+    EGLint value, surface_type;
     PIXELFORMATDESCRIPTOR *pfd = &fmt->pfd;

-    memset(pfd, 0, sizeof(*pfd));
+    /* If we can't get basic information, there is no point continuing */
+    if (!p_eglGetConfigAttrib(egl_display, config, EGL_SURFACE_TYPE, &surface_type)) return;
+
+    memset(fmt, 0, sizeof(*fmt));
     pfd->nSize = sizeof(*pfd);
     pfd->nVersion = 1;
-    pfd->dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER |
-                   PFD_SUPPORT_COMPOSITION;
+    pfd->dwFlags = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_SUPPORT_COMPOSITION;
+    if (surface_type & EGL_WINDOW_BIT) pfd->dwFlags |= PFD_DRAW_TO_WINDOW;
     pfd->iPixelType = PFD_TYPE_RGBA;
     pfd->iLayerType = PFD_MAIN_PLANE;

@@ -722,6 +725,9 @@ static void describe_pixel_format(EGLConfig config, struct wgl_pixel_format *fmt
     value = 0; \
     p_eglGetConfigAttrib(egl_display, config, attrib, &value); \
     pfd->field = value;
+#define SET_ATTRIB_ARB(field, attrib) \
+    if (!p_eglGetConfigAttrib(egl_display, config, attrib, &value)) value = -1; \
+    fmt->field = value;

/* Although the documentation describes cColorBits as excluding alpha, real
      * drivers tend to return the full pixel size, so do the same. */
@@ -743,7 +749,65 @@ static void describe_pixel_format(EGLConfig config, struct wgl_pixel_format *fmt
     SET_ATTRIB(cDepthBits, EGL_DEPTH_SIZE);
     SET_ATTRIB(cStencilBits, EGL_STENCIL_SIZE);

+    fmt->swap_method = WGL_SWAP_UNDEFINED_ARB;
+
+    if (p_eglGetConfigAttrib(egl_display, config, EGL_TRANSPARENT_TYPE, &value))
+    {
+        switch (value)
+        {
+        case EGL_TRANSPARENT_RGB: fmt->transparent = GL_TRUE; break;
+        case EGL_NONE: fmt->transparent = GL_FALSE; break;
+        default:
+            ERR("unexpected transparency type 0x%x\n", value);
+            fmt->transparent = -1;
+            break;
+        }
+    }
+    else fmt->transparent = -1;
+
+    /* TODO: Support floating point pixel components */
+    fmt->pixel_type = WGL_TYPE_RGBA_ARB;
+
+    fmt->draw_to_pbuffer = !!(surface_type & EGL_PBUFFER_BIT);
+    SET_ATTRIB_ARB(max_pbuffer_pixels, EGL_MAX_PBUFFER_PIXELS);
+    SET_ATTRIB_ARB(max_pbuffer_width, EGL_MAX_PBUFFER_WIDTH);
+    SET_ATTRIB_ARB(max_pbuffer_height, EGL_MAX_PBUFFER_HEIGHT);
+
+    if (p_eglGetConfigAttrib(egl_display, config, EGL_TRANSPARENT_RED_VALUE, &value))
+    {
+        fmt->transparent_red_value_valid = GL_TRUE;
+        fmt->transparent_red_value = value;
+    }
+    if (p_eglGetConfigAttrib(egl_display, config, EGL_TRANSPARENT_GREEN_VALUE, &value))
+    {
+        fmt->transparent_green_value_valid = GL_TRUE;
+        fmt->transparent_green_value = value;
+    }
+    if (p_eglGetConfigAttrib(egl_display, config, EGL_TRANSPARENT_BLUE_VALUE, &value))
+    {
+        fmt->transparent_blue_value_valid = GL_TRUE;
+        fmt->transparent_blue_value = value;
+    }
+    fmt->transparent_alpha_value_valid = GL_TRUE;
+    fmt->transparent_alpha_value = 0;
+    fmt->transparent_index_value_valid = GL_TRUE;
+    fmt->transparent_index_value = 0;
+
+    SET_ATTRIB_ARB(sample_buffers, EGL_SAMPLE_BUFFERS);
+    SET_ATTRIB_ARB(samples, EGL_SAMPLES);
+
+    SET_ATTRIB_ARB(bind_to_texture_rgb, EGL_BIND_TO_TEXTURE_RGB);
+    SET_ATTRIB_ARB(bind_to_texture_rgba, EGL_BIND_TO_TEXTURE_RGBA);
+    fmt->bind_to_texture_rectangle_rgb = fmt->bind_to_texture_rgb;
+    fmt->bind_to_texture_rectangle_rgba = fmt->bind_to_texture_rgba;
+
+    /* TODO: Support SRGB surfaces and enable the attribute */
+    fmt->framebuffer_srgb_capable = GL_FALSE;
+
+    fmt->float_components = GL_FALSE;
+
 #undef SET_ATTRIB
+#undef SET_ATTRIB_ARB
 }

static BOOL has_opengl(void);
@@ -827,6 +891,11 @@ static BOOL init_opengl_funcs(void)
     opengl_funcs.ext.p_wglGetSwapIntervalEXT = wayland_wglGetSwapIntervalEXT;
     opengl_funcs.ext.p_wglSwapIntervalEXT = wayland_wglSwapIntervalEXT;

+    register_extension("WGL_ARB_pixel_format");
+    opengl_funcs.ext.p_wglChoosePixelFormatARB = (void *)1; /* never called */
+    opengl_funcs.ext.p_wglGetPixelFormatAttribfvARB = (void *)1; /* never called */
+    opengl_funcs.ext.p_wglGetPixelFormatAttribivARB = (void *)1; /* never called */
+
     return TRUE;
 }