Fix global headless context not being used

Didn't update a field, so opengl was failing to use any buffers at all
:) that took a ridiculous amount of debugging to find, since it just
caused a segfault with a null buffer.

Author: codebycruz

packages/arisu-gfx/buffer/gl.lua

@@ -13,7 +13,7 @@ function GLBuffer.new(descriptor)
 	local handle = ffi.new("GLuint[1]")
 	gl.createBuffers(1, handle)
 
-	-- Allocate the buffer (necessary for setSlice to work)
+	-- Allocate the buffer (might be necessary for setSlice to work)
 	gl.namedBufferData(handle[0], descriptor.size, nil, gl.DYNAMIC_DRAW)
 
 	local isUniform = false

packages/arisu-gfx/command_buffer/gl.lua

@@ -63,7 +63,6 @@ function GLCommandBuffer:execute()
 					print("created vao", vao.id)
 				end
 				vao = vaos[texture.context]
-				print("binding vao")
 				vao:bind()
 
 				gl.bindFramebuffer(gl.FRAMEBUFFER, texture.framebuffer)

packages/arisu-gfx/device/gl.lua

@@ -8,7 +8,7 @@ local GLSampler = require("arisu-gfx.sampler.gl")
 
 ---@class gfx.gl.Device
 ---@field public queue gfx.gl.Queue
----@field private ctx gfx.gl.Context
+---@field ctx gfx.gl.Context
 local GLDevice = {}
 GLDevice.__index = GLDevice
 

packages/arisu-gfx/surface/gl.lua

@@ -16,7 +16,7 @@ end
 ---@param device gfx.gl.Device
 ---@param config gfx.SurfaceConfig
 function GLSurface:configure(device, config)
-	local context = GLContext.fromWindow(self.window, device.globalContext)
+	local context = GLContext.fromWindow(self.window, device.ctx)
 	return GLSwapchain.new(context)
 end
 

packages/arisu-opengl/init.lua

@@ -13,6 +13,7 @@ ffi.cdef([[
 	typedef intptr_t GLintptr;
 	typedef intptr_t GLsizeiptr;
 	typedef void* GLsync;
+	typedef uint8_t GLboolean;
 
 	typedef void (*GLDEBUGPROC)(unsigned int, unsigned int, unsigned int, unsigned int, int, const char*, const void*);
 ]])
@@ -25,6 +26,8 @@ ffi.cdef([[
 	void glDrawElements(GLenum mode, GLsizei count, GLenum type, const void* indices);
 	void glDeleteTextures(GLsizei n, const GLuint* textures);
 	char* glGetString(GLenum name);
+	void glGetIntegerv(GLenum pname, GLint* data);
+	GLenum glGetError();
 	void glEnable(GLenum cap);
 	void glDisable(GLenum cap);
 	void glBlendFunc(GLenum sfactor, GLenum dfactor);
@@ -95,6 +98,9 @@ local nonCoreFnDefs = {
 	glSamplerParameteri = "void(*)(GLuint, GLenum, GLint)",
 	glSamplerParameterf = "void(*)(GLuint, GLenum, GLfloat)",
 	glBindSampler = "void(*)(GLuint, GLuint)",
+
+	glIsVertexArray = "GLboolean(*)(GLuint)",
+	glIsBuffer = "GLboolean(*)(GLuint)",
 }
 
 ---@type fun(name: string): function
@@ -471,4 +477,24 @@ return {
 
 	---@type fun(source: number, type: number, severity: number, count: number, ids: ffi.cdata*, enabled: number)
 	debugMessageControl = C.glDebugMessageControl,
+
+	---@type fun(pname: number): number
+	getInteger = function(pname)
+		local data = ffi.new("GLint[1]")
+		C.glGetIntegerv(pname, data)
+		return data[0]
+	end,
+
+	---@type fun(): number
+	getError = C.glGetError,
+
+	---@type fun(id: number): boolean
+	isVertexArray = function(id)
+		return C.glIsVertexArray(id) ~= 0
+	end,
+
+	---@type fun(id: number): boolean
+	isBuffer = function(id)
+		return C.glIsBuffer(id) ~= 0
+	end,
 }