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EGL: Fix creation of single-buffered windows

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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)
This commit is contained in:
Camilla Löwy 2021-05-14 17:22:26 +02:00
parent 6769ffcd0f
commit 163fa83fac
2 changed files with 6 additions and 1 deletions
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5
src/egl_context.c
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@ -173,7 +173,7 @@ static GLFWbool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
u->stencilBits = getEGLConfigAttrib(n, EGL_STENCIL_SIZE); u->stencilBits = getEGLConfigAttrib(n, EGL_STENCIL_SIZE);
u->samples = getEGLConfigAttrib(n, EGL_SAMPLES); u->samples = getEGLConfigAttrib(n, EGL_SAMPLES);
u->doublebuffer = GLFW_TRUE; u->doublebuffer = desired->doublebuffer;
u->handle = (uintptr_t) n; u->handle = (uintptr_t) n;
usableCount++; usableCount++;
@ -596,6 +596,9 @@ GLFWbool _glfwCreateContextEGL(_GLFWwindow* window,
setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR); setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
} }
if (!fbconfig->doublebuffer)
setAttrib(EGL_RENDER_BUFFER, EGL_SINGLE_BUFFER);
setAttrib(EGL_NONE, EGL_NONE); setAttrib(EGL_NONE, EGL_NONE);
window->context.egl.surface = window->context.egl.surface =

2
src/egl_context.h
View File

@ -80,6 +80,8 @@ typedef struct wl_egl_window* EGLNativeWindowType;
#define EGL_OPENGL_ES_API 0x30a0 #define EGL_OPENGL_ES_API 0x30a0
#define EGL_OPENGL_API 0x30a2 #define EGL_OPENGL_API 0x30a2
#define EGL_NONE 0x3038 #define EGL_NONE 0x3038
#define EGL_RENDER_BUFFER 0x3086
#define EGL_SINGLE_BUFFER 0x3085
#define EGL_EXTENSIONS 0x3055 #define EGL_EXTENSIONS 0x3055
#define EGL_CONTEXT_CLIENT_VERSION 0x3098 #define EGL_CONTEXT_CLIENT_VERSION 0x3098
#define EGL_NATIVE_VISUAL_ID 0x302e #define EGL_NATIVE_VISUAL_ID 0x302e