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renderer/opengl: create the screen texture

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This commit is contained in:
Mitchell Hashimoto
2023-11-17 20:39:20 -08:00
parent db244da101
commit c8a51a2158
4 changed files with 111 additions and 40 deletions
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15
pkg/opengl/Framebuffer.zig
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@@ -20,8 +20,13 @@ pub fn destroy(v: Framebuffer) void {
}
pub fn bind(v: Framebuffer, target: Target) !Binding {
// The default framebuffer is documented as being zero but
// on multiple OpenGL drivers its not zero, so we grab it
// at runtime.
var current: c.GLint = undefined;
glad.context.GetIntegerv.?(c.GL_FRAMEBUFFER_BINDING, &current);
glad.context.BindFramebuffer.?(@intFromEnum(target), v.id);
return .{ .target = target };
return .{ .target = target, .previous = @intCast(current) };
}
/// Enum for possible binding targets.
@@ -55,9 +60,13 @@ pub const Status = enum(c_uint) {
pub const Binding = struct {
target: Target,
previous: c.GLuint,
pub fn unbind(self: Binding) void {
glad.context.BindFramebuffer.?(@intFromEnum(self.target), 0);
glad.context.BindFramebuffer.?(
@intFromEnum(self.target),
self.previous,
);
}
pub fn texture2D(
@@ -78,6 +87,6 @@ pub const Binding = struct {
}
pub fn checkStatus(self: Binding) Status {
return @enumFromInt(glad.context.CheckFramebufferStatus.?(self.target));
return @enumFromInt(glad.context.CheckFramebufferStatus.?(@intFromEnum(self.target)));
}
};