replace GLFW with MiniFB

Author: jebej

Project.toml

@@ -6,7 +6,6 @@ version = "0.1.0"
 [deps]
 ColorTypes = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"
 FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
-GLFW = "f7f18e0c-5ee9-5ccd-a5bf-e8befd85ed98"
 ImageMagick = "6218d12a-5da1-5696-b52f-db25d2ecc6d1"
-ModernGL = "66fc600b-dfda-50eb-8b99-91cfa97b1301"
+MiniFB = "cc649173-1898-4bb8-8a16-ca5f88bd87d9"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"

src/VoxelSpace.jl

@@ -1,5 +1,6 @@
+# strongly inspired by https://github.com/s-macke/VoxelSpace
 module VoxelSpace
-using GLFW, ModernGL, Printf, ColorTypes, FileIO
+using MiniFB, Printf, ColorTypes, FileIO
 using Base: unsafe_trunc
 
 include("map_utils.jl")
@@ -15,33 +16,17 @@ const MAP_HEIGHT = 1024
 function run(map="C1W")
     # Load map and create buffer
     datac, datah = read_map(map)
-    data = similar(datac, WIN_WIDTH, WIN_HEIGHT)
+    data = Matrix{RGB24}(undef, WIN_WIDTH, WIN_HEIGHT)
     hbuffer = Vector{Int}(undef, WIN_WIDTH)
 
     # Create window
-    GLFW.WindowHint(GLFW.DOUBLEBUFFER, false)
-    window = GLFW.CreateWindow(WIN_WIDTH, WIN_HEIGHT, "VoxelSpace.jl")
-    GLFW.MakeContextCurrent(window)
-
-    # Generate texture
-    tex = glGenTextures()
-    glBindTexture(GL_TEXTURE_2D,tex)
-    glTexImage2D(GL_TEXTURE_2D,0,GL_RGB8,WIN_WIDTH,WIN_HEIGHT,0,GL_RGB,GL_UNSIGNED_BYTE,data)
-
-    # Generate and bind the read framebuffer
-    readFboId = Ref{Cuint}(0)
-    glGenFramebuffers(1,readFboId)
-    glBindFramebuffer(GL_READ_FRAMEBUFFER,readFboId[])
-
-    # Bind texture to the read framebuffer
-    glFramebufferTexture2D(GL_READ_FRAMEBUFFER,GL_COLOR_ATTACHMENT0,GL_TEXTURE_2D,tex,0)
-
-    # Bind the default framebuffer (0) to draw
-    glBindFramebuffer(GL_DRAW_FRAMEBUFFER,0)
+    window = mfb_open_ex("VoxelSpace.jl", WIN_WIDTH, WIN_HEIGHT, MiniFB.WF_RESIZABLE);
 
     # Set up input callbacks
-    GLFW.SetKeyCallback(window,key_cb_fun)
-    GLFW.SetCursorPosCallback(window,mouse_cb_fun)
+    key_cb_fun_c = @cfunction(key_cb_fun, Cvoid, (Ptr{Cvoid}, mfb_key, mfb_key_mod, Bool))
+    mouse_cb_fun_c = @cfunction(mouse_cb_fun, Cvoid, (Ptr{Cvoid}, Int32, Int32))
+    mfb_set_keyboard_callback(window, key_cb_fun_c)
+    mfb_set_mouse_move_callback(window, mouse_cb_fun_c)
 
     # Set up FPS counter
     t1 = time_ns()
@@ -54,10 +39,7 @@ function run(map="C1W")
     θ  = 0f0
 
     try
-        while !GLFW.WindowShouldClose(window)
-            # Check for inputs
-            GLFW.PollEvents()
-
+        while mfb_wait_sync(window)
             # Compute movement direction and apply to pos
             dx,dy,dz,dθ = compute_movement!(θ)
             px += dx
@@ -66,32 +48,21 @@ function run(map="C1W")
             θ  += dθ
 
             # Update texture
-            render!(data,hbuffer,datac,datah,(px,py,pz),θ[],WIN_HEIGHT÷2,WIN_HEIGHT÷2)
-            glTexSubImage2D(GL_TEXTURE_2D,0,0,0,WIN_WIDTH,WIN_HEIGHT,GL_RGB,GL_UNSIGNED_BYTE,data)
+            render!(data,hbuffer,datac,datah,(px,py,pz),θ,WIN_HEIGHT>>1,WIN_HEIGHT>>1)
 
-            # Blit read framebuffer (texture) to draw framebuffer (display)
-            glBlitFramebuffer(0,0,WIN_WIDTH,WIN_HEIGHT,0,0,WIN_WIDTH,WIN_HEIGHT,GL_COLOR_BUFFER_BIT,GL_LINEAR)
-            glFlush()
-            #GLFW.SwapBuffers(window)
+            state = mfb_update(window, data)
+            state == MiniFB.STATE_OK || break
 
             # Compute FPS
             t2 = time_ns()
             @printf("\b\b\b%3.0f", 1E9/(t2-t1))
             t1 = t2
         end
     finally
-        GLFW.DestroyWindow(window)
+        mfb_close(window)
         println()
     end
     return nothing
 end
 
-
-function ModernGL.glGenTextures()
-    id = Ref{GLuint}(0)
-    glGenTextures(1, id)
-    id[] <= 0 && @error "glGenTextures returned an invalid id. Is the OpenGL context active?"
-    return id[]
-end
-
 end # module

src/input.jl

@@ -7,45 +7,40 @@ const mov_up = Ref(false)
 const mov_down = Ref(false)
 const mov_boost = Ref(false)
 
-function key_cb_fun(_, key, scancode, action, mods)
-    if key == GLFW.KEY_W # up
-        action == GLFW.PRESS   && (mov_forward[] = true)
-        action == GLFW.RELEASE && (mov_forward[] = false)
-    elseif key == GLFW.KEY_A # left
-        action == GLFW.PRESS   && (mov_left[] = true)
-        action == GLFW.RELEASE && (mov_left[] = false)
-    elseif key == GLFW.KEY_D # right
-        action == GLFW.PRESS   && (mov_right[] = true)
-        action == GLFW.RELEASE && (mov_right[] = false)
-    elseif key == GLFW.KEY_S # down
-        action == GLFW.PRESS   && (mov_back[] = true)
-        action == GLFW.RELEASE && (mov_back[] = false)
-    elseif scancode == 57 # space
-        action == GLFW.PRESS   && (mov_up[] = true)
-        action == GLFW.RELEASE && (mov_up[] = false)
-    elseif scancode == 29 # l-ctrl
-        action == GLFW.PRESS   && (mov_down[] = true)
-        action == GLFW.RELEASE && (mov_down[] = false)
-    elseif scancode == 42 # l-shift
-        action == GLFW.PRESS   && (mov_boost[] = true)
-        action == GLFW.RELEASE && (mov_boost[] = false)
+function key_cb_fun(_, key, _, action)
+    if key == MiniFB.KB_KEY_W # up
+        mov_forward[] = action
+    elseif key == MiniFB.KB_KEY_A # left
+        mov_left[] = action
+    elseif key == MiniFB.KB_KEY_D # right
+        mov_right[] = action
+    elseif key == MiniFB.KB_KEY_S # down
+        mov_back[] = action
+    elseif key == MiniFB.KB_KEY_SPACE # space
+        mov_up[] = action
+    elseif key == MiniFB.KB_KEY_LEFT_CONTROL # l-ctrl
+        mov_down[] = action
+    elseif key == MiniFB.KB_KEY_LEFT_SHIFT # l-shift
+        mov_boost[] = action
     end
     return nothing
 end
 
-const mouse_pos  = Float32[0,0]
-const mouse_move = Float32[0,0]
+
+const mouse_pos = Int32[0,0]
+const mouse_mov = Int32[0,0]
 
 function mouse_cb_fun(_, x, y)
-    mouse_move .= (x,y) .- mouse_pos
-    mouse_pos  .= (x,y)
+    mouse_mov .= (x,y) .- mouse_pos
+    mouse_pos .= (x,y)
     return nothing
 end
 
+
 function compute_movement!(θ)
     # mouse
-    dθ = -mouse_move[1]*1f-2
-    mouse_move .= 0f0
+    dθ = -mouse_mov[1]*1f-2
+    fill!(mouse_mov, zero(Int32))
     # keyboard; signs empirically adjusted...
     sθ, cθ = sincos(θ)
     dx = (mov_right[]-mov_left[])*cθ - (mov_forward[]-mov_back[])*sθ

src/map_utils.jl

@@ -1,6 +1,6 @@
 function read_map(map::String)
     map_dir = joinpath(dirname(@__DIR__), "maps")
-    datac = load(joinpath(map_dir,map)*".png")
+    datac = RGB24.(load(joinpath(map_dir,map)*".png"))
     datah = Float32.(reinterpret(UInt8,load(joinpath(map_dir,MAP_LIST[map])*".png")))
     return datac, datah
 end

src/render.jl

@@ -1,7 +1,7 @@
-function render!(data, hbuffer, colormap, heightmap, pos::Tuple{T,T,T}, θ::T, horizon, zscale) where T<:Number
+function render!(data, hbuffer, colormap, heightmap, pos::Tuple{T,T,T}, θ::T, horizon, zscale) where T<:Real
     # draw background (light blue sky)
-    fill!(data, RGB(0.529f0, 0.808f0, 0.980f0))
-    fill!(hbuffer, 1)
+    fill!(data, RGB24(0.529f0, 0.808f0, 0.980f0))
+    fill!(hbuffer, WIN_HEIGHT)
     # precompute some constants
     w = Base.multiplicativeinverse(MAP_WIDTH%UInt)
     h = Base.multiplicativeinverse(MAP_HEIGHT%UInt)
@@ -21,14 +21,14 @@ function render!(data, hbuffer, colormap, heightmap, pos::Tuple{T,T,T}, θ::T, h
             pxi = 1 + rem(unsafe_trunc(Int, px)%UInt, w)
             pyi = 1 + rem(unsafe_trunc(Int, py)%UInt, h)
             # compute the on-screen height of the feature
-            height = min(WIN_HEIGHT, unsafe_trunc(Int, (heightmap[pxi,pyi]-pos[3])*scale) + horizon)
+            height = unsafe_trunc(Int, (pos[3]-heightmap[pxi,pyi])*scale) + horizon
             # assign color to column
             color = colormap[pxi,pyi]
-            for i in hbuffer[j] : height
+            for i in max(height,1) : hbuffer[j]
                 data[j,i] = color
             end
             # keep track of feature height
-            if height > hbuffer[j]
+            if height < hbuffer[j]
                 hbuffer[j] = height
             end
             # move to next view-line feature position