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glfw: add Monitor.setGammaRamp

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2021-07-17 21:57:02 -07:00
parent 349462cb77
commit 4fa50d273b
1 changed files with 37 additions and 3 deletions
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40
glfw/src/Monitor.zig
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@ -246,7 +246,7 @@ pub inline fn getVideoMode(self: Monitor) Error!VideoMode {
/// @thread_safety This function must only be called from the main thread.
///
/// see also: monitor_gamma
pub fn setGamma(self: Monitor, gamma: f32) Error!void {
pub inline fn setGamma(self: Monitor, gamma: f32) Error!void {
c.glfwSetGamma(self.handle, gamma);
try getError();
}
@ -266,12 +266,42 @@ pub fn setGamma(self: Monitor, gamma: f32) Error!void {
/// @thread_safety This function must only be called from the main thread.
///
/// see also: monitor_gamma
pub fn getGammaRamp(self: Monitor) Error!GammaRamp {
pub inline fn getGammaRamp(self: Monitor) Error!GammaRamp {
const ramp = c.glfwGetGammaRamp(self.handle);
try getError();
return GammaRamp.fromC(ramp.*);
}
/// Sets the current gamma ramp for the specified monitor.
///
/// This function sets the current gamma ramp for the specified monitor. The original gamma ramp
/// for that monitor is saved by GLFW the first time this function is called and is restored by
/// `glfw.terminate()`.
///
/// The software controlled gamma ramp is applied _in addition_ to the hardware gamma correction,
/// which today is usually an approximation of sRGB gamma. This means that setting a perfectly
/// linear ramp, or gamma 1.0, will produce the default (usually sRGB-like) behavior.
///
/// For gamma correct rendering with OpenGL or OpenGL ES, see the glfw.srgb_capable hint.
///
/// Possible errors include glfw.Error.NotInitialized and glfw.Error.PlatformError.
///
/// The size of the specified gamma ramp should match the size of the current ramp for that
/// monitor. On win32, the gamma ramp size must be 256.
///
/// wayland: Gamma handling is a privileged protocol, this function will thus never be implemented
/// and emits glfw.Error.PlatformError.
///
/// @pointer_lifetime The specified gamma ramp is copied before this function returns.
///
/// @thread_safety This function must only be called from the main thread.
///
/// see also: monitor_gamma
pub inline fn setGammaRamp(self: Monitor, ramp: GammaRamp) Error!void {
c.glfwSetGammaRamp(self.handle, &ramp.toC());
try getError();
}
/// Returns the currently connected monitors.
///
/// This function returns a slice of all currently connected monitors. The primary monitor is
@ -491,7 +521,7 @@ test "getVideoMode" {
}
}
test "getGammaRamp" {
test "set_getGammaRamp" {
const allocator = testing.allocator;
const glfw = @import("main.zig");
try glfw.init();
@ -501,6 +531,10 @@ test "getGammaRamp" {
if (monitor) |m| {
const ramp = try m.getGammaRamp();
// Set it to the exact same value; if we do otherwise an our tests fail it wouldn't call
// terminate and our made-up gamma ramp would get stuck.
try m.setGammaRamp(ramp);
// technically not needed here / noop because GLFW owns this gamma ramp.
defer ramp.deinit(allocator);
}