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glfw: add glfw.extensionSupported

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
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Stephen Gutekanst 2021-10-16 15:33:06 -07:00 • committed by Stephen Gutekanst
parent 17fc430766
commit 10225ecd44
1 changed files with 48 additions and 35 deletions
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83
src/opengl.zig
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@ -90,40 +90,36 @@ pub inline fn swapInterval(interval: isize) Error!void {
try getError(); try getError();
} }
// TODO(opengl): /// Returns whether the specified extension is available.
///
// /// Returns whether the specified extension is available. /// This function returns whether the specified API extension (see context_glext) is supported by
// /// /// the current OpenGL or OpenGL ES context. It searches both for client API extension and context
// /// This function returns whether the specified /// creation API extensions.
// /// [API extension](@ref context_glext) is supported by the current OpenGL or ///
// /// OpenGL ES context. It searches both for client API extension and context /// A context must be current on the calling thread. Calling this function without a current
// /// creation API extensions. /// context will cause Error.NoCurrentContext.
// /// ///
// /// A context must be current on the calling thread. Calling this function /// As this functions retrieves and searches one or more extension strings each call, it is
// /// without a current context will cause a @ref GLFW_NO_CURRENT_CONTEXT error. /// recommended that you cache its results if it is going to be used frequently. The extension
// /// /// strings will not change during the lifetime of a context, so there is no danger in doing this.
// /// As this functions retrieves and searches one or more extension strings each ///
// /// call, it is recommended that you cache its results if it is going to be used /// This function does not apply to Vulkan. If you are using Vulkan, see glfw.getRequiredInstanceExtensions,
// /// frequently. The extension strings will not change during the lifetime of /// `vkEnumerateInstanceExtensionProperties` and `vkEnumerateDeviceExtensionProperties` instead.
// /// a context, so there is no danger in doing this. ///
// /// /// @param[in] extension The ASCII encoded name of the extension.
// /// This function does not apply to Vulkan. If you are using Vulkan, see @ref /// @return `true` if the extension is available, or `false` otherwise.
// /// glfw.getRequiredInstanceExtensions, `vkEnumerateInstanceExtensionProperties` ///
// /// and `vkEnumerateDeviceExtensionProperties` instead. /// Possible errors include glfw.Error.NotInitialized, glfw.Error.NoCurrentContext, glfw.Error.InvalidValue
// /// /// and glfw.Error.PlatformError.
// /// @param[in] extension The ASCII encoded name of the extension. ///
// /// @return `GLFW_TRUE` if the extension is available, or `GLFW_FALSE` /// @thread_safety This function may be called from any thread.
// /// otherwise. ///
// /// /// see also: context_glext, glfw.getProcAddress
// /// Possible errors include glfw.Error.NotInitialized, glfw.Error.NoCurrentContext, glfw.Error.InvalidValue and glfw.Error.PlatformError. pub inline fn extensionSupported(extension: [*c]const u8) Error!bool {
// /// const supported = c.glfwExtensionSupported(extension);
// /// @thread_safety This function may be called from any thread. try getError();
// /// return supported == c.GLFW_TRUE;
// /// see also: context_glext, glfwGetProcAddress }
// ///
// ///
// /// @ingroup context
// GLFWAPI int glfwExtensionSupported(const char* extension);
/// Client API function pointer type. /// Client API function pointer type.
/// ///
@ -160,7 +156,7 @@ pub const GLProc = fn () callconv(.C) void;
/// ///
/// see also: context_glext, glfwExtensionSupported /// see also: context_glext, glfwExtensionSupported
pub inline fn getProcAddress(proc_name: [*c]const u8) Error!?GLProc { pub inline fn getProcAddress(proc_name: [*c]const u8) Error!?GLProc {
const proc_address = c.glfwGetProcAddress(&proc_name[0]); const proc_address = c.glfwGetProcAddress(proc_name);
try getError(); try getError();
if (proc_address) |addr| return addr; if (proc_address) |addr| return addr;
return null; return null;
@ -227,3 +223,20 @@ test "getProcAddress" {
try glfw.makeContextCurrent(window); try glfw.makeContextCurrent(window);
_ = glfw.getProcAddress("foobar") catch |err| std.debug.print("failed to get proc address, error={}\n", .{err}); _ = glfw.getProcAddress("foobar") catch |err| std.debug.print("failed to get proc address, error={}\n", .{err});
} }
test "extensionSupported" {
const glfw = @import("main.zig");
try glfw.init();
defer glfw.terminate();
const window = glfw.Window.create(640, 480, "Hello, Zig!", null, null) catch |err| {
// return without fail, because most of our CI environments are headless / we cannot open
// windows on them.
std.debug.print("note: failed to create window: {}\n", .{err});
return;
};
defer window.destroy();
try glfw.makeContextCurrent(window);
_ = glfw.extensionSupported("foobar") catch |err| std.debug.print("failed to check if extension supported, error={}\n", .{err});
}