Alexandros Frantzis : winewayland: Support WGL_ARB_pixel_format_float.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 31be907221b50d3e2a44c26e0eee85879e53eac9
URL:    https://gitlab.winehq.org/wine/wine/-/commit/31be907221b50d3e2a44c26e0eee858...

Author: Alexandros Frantzis <alexandros.frantzis(a)collabora.com>
Date:   Wed Jun 26 10:55:16 2024 +0300

winewayland: Support WGL_ARB_pixel_format_float.

---

 dlls/winewayland.drv/opengl.c | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/dlls/winewayland.drv/opengl.c b/dlls/winewayland.drv/opengl.c
index e714b2cb952..994154968b3 100644
--- a/dlls/winewayland.drv/opengl.c
+++ b/dlls/winewayland.drv/opengl.c
@@ -49,6 +49,7 @@ static EGLDisplay egl_display;
 static char wgl_extensions[4096];
 static EGLConfig *egl_configs;
 static int num_egl_configs;
+static BOOL has_egl_ext_pixel_format_float;
 
 #define USE_GL_FUNC(name) #name,
 static const char *opengl_func_names[] = { ALL_WGL_FUNCS };
@@ -765,8 +766,24 @@ static void describe_pixel_format(EGLConfig config, struct wgl_pixel_format *fmt
     }
     else fmt->transparent = -1;
 
-    /* TODO: Support floating point pixel components */
-    fmt->pixel_type = WGL_TYPE_RGBA_ARB;
+    if (!has_egl_ext_pixel_format_float) fmt->pixel_type = WGL_TYPE_RGBA_ARB;
+    else if (p_eglGetConfigAttrib(egl_display, config, EGL_COLOR_COMPONENT_TYPE_EXT, &value))
+    {
+        switch (value)
+        {
+        case EGL_COLOR_COMPONENT_TYPE_FIXED_EXT:
+            fmt->pixel_type = WGL_TYPE_RGBA_ARB;
+            break;
+        case EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT:
+            fmt->pixel_type = WGL_TYPE_RGBA_FLOAT_ARB;
+            break;
+        default:
+            ERR("unexpected color component type 0x%x\n", value);
+            fmt->pixel_type = -1;
+            break;
+        }
+    }
+    else fmt->pixel_type = -1;
 
     fmt->draw_to_pbuffer = !!(surface_type & EGL_PBUFFER_BIT);
     SET_ATTRIB_ARB(max_pbuffer_pixels, EGL_MAX_PBUFFER_PIXELS);
@@ -896,6 +913,12 @@ static BOOL init_opengl_funcs(void)
     opengl_funcs.ext.p_wglGetPixelFormatAttribfvARB = (void *)1; /* never called */
     opengl_funcs.ext.p_wglGetPixelFormatAttribivARB = (void *)1; /* never called */
 
+    if (has_egl_ext_pixel_format_float)
+    {
+        register_extension("WGL_ARB_pixel_format_float");
+        register_extension("WGL_ATI_pixel_format_float");
+    }
+
     return TRUE;
 }
 
@@ -1030,6 +1053,8 @@ static void init_opengl(void)
     REQUIRE_EXT(EGL_KHR_no_config_context);
 #undef REQUIRE_EXT
 
+    has_egl_ext_pixel_format_float = has_extension(egl_exts, "EGL_EXT_pixel_format_float");
+
     if (!init_opengl_funcs()) goto err;
     if (!init_egl_configs()) goto err;