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EGL: Fix creation of single-buffered windows
The EGL backend ignored the state of GLFW_DOUBLEBUFFER and always
created a double-buffered EGL window.
This sets the EGL_RENDER_BUFFER attribute at EGL window creation
appropriately.
Fixes #1843.
(cherry picked from commit 114776a246
)
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@ -173,7 +173,7 @@ static GLFWbool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
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u->stencilBits = getEGLConfigAttrib(n, EGL_STENCIL_SIZE);
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u->samples = getEGLConfigAttrib(n, EGL_SAMPLES);
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u->doublebuffer = GLFW_TRUE;
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u->doublebuffer = desired->doublebuffer;
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u->handle = (uintptr_t) n;
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usableCount++;
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@ -596,6 +596,9 @@ GLFWbool _glfwCreateContextEGL(_GLFWwindow* window,
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setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
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}
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if (!fbconfig->doublebuffer)
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setAttrib(EGL_RENDER_BUFFER, EGL_SINGLE_BUFFER);
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setAttrib(EGL_NONE, EGL_NONE);
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window->context.egl.surface =
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@ -80,6 +80,8 @@ typedef struct wl_egl_window* EGLNativeWindowType;
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#define EGL_OPENGL_ES_API 0x30a0
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#define EGL_OPENGL_API 0x30a2
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#define EGL_NONE 0x3038
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#define EGL_RENDER_BUFFER 0x3086
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#define EGL_SINGLE_BUFFER 0x3085
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#define EGL_EXTENSIONS 0x3055
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#define EGL_CONTEXT_CLIENT_VERSION 0x3098
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#define EGL_NATIVE_VISUAL_ID 0x302e
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