Add friendly graphics implementation

examples/accounts/account_ex.nim

@@ -1,12 +1,12 @@
-import libnx/wrapper/gfx
+import libnx/graphics
 import libnx/wrapper/hid
 import libnx/wrapper/console
+import libnx/ext/integer128
 import libnx/account
-import libnx/utils
-import libnx/wrapper/types
+import libnx/app
 
 proc main() =
-  gfxInitDefault()
+  initDefault()
   discard consoleInit(nil)
 
   echo "\x1b[5;2H" & "Account info:"

examples/helloworld/helloworld.nim

@@ -1,10 +1,10 @@
-import libnx/wrapper/gfx
+import libnx/graphics
 import libnx/wrapper/console
 import libnx/wrapper/hid
-import libnx/utils
+import libnx/app
 
 proc main() =
-  gfxInitDefault()
+  initDefault()
   discard consoleInit(nil)
 
   echo "\x1b[17;20HHELLO FROM NIM"

libnxGen.cfg

@@ -164,7 +164,7 @@ replace.uint64 = "uint64_t* = uint64"
 
 search.import = "type\n"
 prepend.import = """
-include libnx/ext/integer128
+import libnx/ext/integer128
 template BIT*(n): auto = (1.uint shl n)
 """
 
@@ -299,3 +299,15 @@ import libnx/wrapper/binder
 [nxlink.nim]
 search.o = "var __nxlink"
 replace.o = "var DUnxlink"
+
+[fs.nim]
+search.o = "import libnx"
+prepend.o = """
+import libnx/ext/integer128
+"""
+
+[acc.nim]
+search.o = "import libnx"
+prepend.o = """
+import libnx/ext/integer128
+"""

src/libnx/account.nim

@@ -2,7 +2,9 @@ import strutils
 import libnx/wrapper/acc
 import libnx/results
 import libnx/wrapper/types
+import libnx/ext/integer128
 import libnx/service
+import libnx/utils
 
 type
   AccountError* = object of Exception
@@ -32,9 +34,6 @@ type
 
 var enabled = false
 
-template raiseEx(ty: untyped, message: string) =
-  raise newException(ty, message)
-
 proc getService*(): Service =
   let serv = accountGetService()[]
   result = newService(serv)
@@ -46,7 +45,10 @@ proc init*() =
 
   let code = accountInitialize().newResult
   if code.failed:
-    raiseEx(AccountInitError, "Error, account api could not be initialized: " & code.description)
+    raiseEx(
+      AccountInitError,
+      "Error, account api could not be initialized: " & code.description
+    )
   enabled = true
 
 proc exit*() =
@@ -59,7 +61,7 @@ proc exit*() =
 proc close*(profile: AccountProfile) =
   accountProfileClose(profile.unsafeAddr)
 
-template withAccountService*(code: typed): typed =
+template withAccountService*(code: untyped): typed =
   init()
   code
   exit()

src/libnx/app.nim

@@ -0,0 +1,13 @@
+import libnx/graphics, libnx/wrapper/hid, libnx/wrapper/applet
+
+template mainLoop*(code: untyped): untyped =
+  while appletMainLoop():
+    hidScanInput()
+
+    code
+
+    flushBuffers()
+    swapBuffers()
+    waitForVSync()
+
+  graphics.exit()

src/libnx/graphics.nim

@@ -0,0 +1,200 @@
+import strutils
+import
+  libnx/wrapper/types,
+  libnx/wrapper/gfx,
+  libnx/utils
+
+type
+  GraphicsError* = object of Exception
+  InitResolutionError* = object of GraphicsError
+  CropBoundsError* = object of GraphicsError
+
+  RGBA8* = ref object
+    red*: int
+    green*: int
+    blue*: int
+    alpha*: int
+
+  Framebuffer* = ref object
+    width*: uint32
+    height*: uint32
+    data*: Buffer[uint8]
+
+  BufferTransform* {.pure, size: sizeof(cint).} = enum
+    FlipHorizontal = 0x1
+    FlipVertical = 0x2
+    Rotate180 = 0x3
+    Rotate90 = 0x4
+    Rotate270 = 0x7
+
+## / Converts red, green, blue, and alpha components to packed RGBA8.
+proc packed*(rgba: RGBA8): int =
+  gfx.RGBA8(rgba.red, rgba.green, rgba.blue, rgba.alpha)
+
+## / Same as \ref RGBA8 except with alpha=0xff.
+proc maxAlpha*(r, g, b: int): RGBA8 =
+  RGBA8(red:r, green:g, blue:b, alpha:0xFF)
+
+## / GfxMode set by \ref gfxSetMode. The default is GfxMode_LinearDouble. Note that the
+## text-console (see console.h) sets this to GfxMode_TiledDouble.
+type
+  GfxMode* {.size: sizeof(cint), pure.} = enum
+    TiledSingle,  ## /< Single-buffering with raw tiled (block-linear) framebuffer.
+    TiledDouble,  ## /< Double-buffering with raw tiled (block-linear) framebuffer.
+    LinearDouble  ## /< Double-buffering with linear framebuffer, which is
+                  ## transferred to the actual framebuffer by \ref gfxFlushBuffers().
+
+var enabled = false
+
+## / Framebuffer pixel-format is RGBA8888, there's no known way to change this.
+## *
+##  @brief Initializes the graphics subsystem.
+##  @warning Do not use \ref viInitialize when using this function.
+##
+proc initDefault*() =
+  if not enabled:
+    gfxInitDefault()
+  enabled = true
+
+## *
+##  @brief Uninitializes the graphics subsystem.
+##  @warning Do not use \ref viExit when using this function.
+##
+proc exit*() =
+  if enabled:
+    gfxExit()
+    enabled = false
+
+## / Get the framebuffer width/height without crop.
+proc getFramebufferResolution*(): tuple[width: uint32, height: uint32] =
+  var
+    width: uint32
+    height: uint32
+  gfxGetFramebufferResolution(width.addr, height.addr)
+  return (width: width, height: height)
+
+## *
+##  @brief Sets the resolution to be used when initializing the graphics subsystem.
+##  @param[in] width Horizontal resolution, in pixels.
+##  @param[in] height Vertical resolution, in pixels.
+##  @note The default resolution is 720p.
+##  @note This can only be used before calling \ref gfxInitDefault, this will use \ref
+##  fatalSimple otherwise. If the input is 0, the default resolution will be used during
+##  \ref gfxInitDefault. This sets the maximum resolution for the framebuffer, used
+##  during \ref gfxInitDefault. This is also used as the current resolution when crop
+##  isn't set. The width/height are reset to the default when \ref gfxExit is used.
+##  @note Normally you should only use this when you need a maximum resolution larger
+##  than the default, see above.
+##  @note The width and height are aligned to 4.
+##
+proc initResolution*(width: uint32; height: uint32) =
+  if not enabled:
+    gfxInitResolution(width, height)
+  else:
+    raiseEx(InitResolutionError, "Cannot init resolution after graphics.initDefault!")
+
+## / Wrapper for \ref gfxInitResolution with resolution=1080p. Use this if you want to
+## support 1080p or >720p in docked-mode.
+proc initResolution1080p*() =
+  if not enabled:
+    gfxInitResolutionDefault()
+  else:
+    raiseEx(InitResolutionError, "Cannot init resolution after graphics.initDefault!")
+
+proc cropBoundsValid(left, top, right, bottom: uint32, width, height: uint32): bool =
+
+  if left < right and top > bottom:
+    if left <= width and right <= width:
+      if top <= height and bottom <= height:
+        return true
+  return false
+
+## / Configure framebuffer crop, by default crop is all-zero. Use all-zero input to
+## reset to default. \ref gfxExit resets this to the default.
+## / When the input is invalid this returns without changing the crop data, this
+## includes the input values being larger than the framebuf width/height.
+## / This will update the display width/height returned by \ref gfxGetFramebuffer, with
+## that width/height being reset to the default when required.
+## / \ref gfxGetFramebufferDisplayOffset uses absolute x/y, it will not adjust for
+## non-zero crop left/top.
+## / The new crop config will not take affect with double-buffering disabled. When used
+## during frame-drawing, this should be called before \ref gfxGetFramebuffer.
+## / The right and bottom params are aligned to 4.
+proc setCrop*(left, top, right, bottom: uint32) =
+  let (width, height) = getFramebufferResolution()
+  if not cropBoundsValid(left, top, right, bottom, width, height):
+    raiseEx(
+      CropBoundsError,
+      "The crop bounds are outside the frame buffer limits of w: $#, h:$#" %
+      [$width, $height]
+    )
+  gfxConfigureCrop(left.s32, top.s32, right.s32, bottom.s32)
+
+proc resetCrop*() =
+  setCrop(0, 0, 0, 0)
+
+## / Wrapper for \ref gfxConfigureCrop. Use this to set the resolution, within the
+## bounds of the maximum resolution. Use all-zero input to reset to default.
+proc setCropResolution*(width, height: uint32) =
+  gfxConfigureResolution(width.s32, height.s32)
+
+## / If enabled, \ref gfxConfigureResolution will be used with the input resolution for
+## the current OperationMode. Then \ref gfxConfigureResolution will automatically be
+## used with the specified resolution each time OperationMode changes.
+proc setAutoResolution*(enable: bool, handheldWidth,
+                        handheldHeight, dockedWidth,
+                        dockedHeight: uint32) =
+  gfxConfigureAutoResolution(
+    enable, handheldWidth.s32, handheldHeight.s32, dockedWidth.s32, dockedHeight.s32
+  )
+
+## / Wrapper for \ref gfxConfigureAutoResolution. handheld_resolution=720p,
+## docked_resolution={all-zero for using current maximum resolution}.
+proc setAutoResolutionDefault*(enable: bool) =
+  gfxConfigureAutoResolutionDefault(enable)
+
+## / Waits for vertical sync.
+proc waitForVsync*() = gfxWaitForVSync()
+
+## / Swaps the framebuffers (for double-buffering).
+proc swapBuffers*() = gfxSwapBuffers()
+
+## / Use this to get the actual byte-size of the framebuffer for use with memset/etc.
+proc getFramebufferSize*(): int = gfxGetFramebufferSize().int
+
+## / Get the current framebuffer address, with optional output ptrs for the display
+## framebuffer width/height. The display width/height is adjusted by \ref
+## gfxConfigureCrop and \ref gfxConfigureResolution.
+proc getFramebuffer*(): Framebuffer =
+  result = new(Framebuffer)
+  let size = getFramebufferSize()
+  let frameBuf = gfxGetFrameBuffer(
+    result.width.addr,
+    result.height.addr
+  )
+  let arr = cast[ptr UncheckedArray[uint8]](frameBuf)
+  result.data = Buffer[uint8](len: size, data: arr)
+
+## / Sets the \ref GfxMode.
+proc setMode*(mode: GfxMode) = gfxSetMode(gfx.GfxMode(mode))
+
+## / Controls whether a vertical-flip is done when determining the pixel-offset within
+## the actual framebuffer. By default this is enabled.
+proc setDrawFlip*(enabled: bool) = gfxSetDrawFlip(enabled)
+
+## / Configures transform. See the NATIVE_WINDOW_TRANSFORM_* enums in buffer_producer.h.
+## The default is NATIVE_WINDOW_TRANSFORM_FLIP_V.
+proc configureTransform*(transform: BufferTransform) =
+  gfxConfigureTransform(transform.uint32)
+
+## / Flushes the framebuffer in the data cache. When \ref GfxMode is
+## GfxMode_LinearDouble, this also transfers the linear-framebuffer to the actual
+## framebuffer.
+proc flushBuffers*() = gfxFlushBuffers()
+
+## / Use this to get the pixel-offset in the framebuffer. Returned value is in pixels,
+## not bytes.
+## / This implements tegra blocklinear, with hard-coded constants etc.
+## / Do not use this when \ref GfxMode is GfxMode_LinearDouble.
+proc getFramebufferDisplayOffset*(x: uint32; y: uint32): uint32 =
+  gfxGetFrameBufferDisplayOffset(x, y)

src/libnx/utils.nim

@@ -1,13 +1,30 @@
-import libnx/wrapper/gfx, libnx/wrapper/hid, libnx/wrapper/applet
 
-template mainLoop*(code: untyped): untyped =
-  while appletMainLoop():
-    hidScanInput()
 
-    code
+type
+  BufferError* = object of Exception
+  BufferIndexError* = object of BufferError
 
-    gfxFlushBuffers()
-    gfxSwapBuffers()
-    gfxWaitForVSync()
+  Buffer*[T] = ref object
+    len*: int
+    data*: ptr UncheckedArray[T]
 
-  gfxExit()
+template raiseEx*(ty: untyped, message: string): untyped =
+  raise newException(ty, message)
+
+proc `[]`[T](buff: Buffer[T], index: int): T =
+  if index > (buff.len - 1):
+    raiseEx(
+      BufferIndexError,
+    "Index: $# is greater than buffer length: $#!" % [$index, $buff.len]
+    )
+
+  result = buff.data[][index]
+
+proc `[]=`[T](buff: Buffer[T], index: int, value: T) =
+  if index > (buff.len - 1):
+    raiseEx(
+      BufferIndexError,
+    "Index: $# is greater than buffer length: $#!" % [$index, $buff.len]
+    )
+
+  buff.data[][index] = value

src/libnx/wrapper/acc.nim

@@ -1,6 +1,7 @@
 import strutils
 import ospaths
 const headeracc = currentSourcePath().splitPath().head & "/nx/include/switch/services/acc.h"
+import libnx/ext/integer128
 import libnx/wrapper/types
 import libnx/wrapper/sm
 type

src/libnx/wrapper/fs.nim

@@ -1,6 +1,7 @@
 import strutils
 import ospaths
 const headerfs = currentSourcePath().splitPath().head & "/nx/include/switch/services/fs.h"
+import libnx/ext/integer128
 import libnx/wrapper/types
 import libnx/wrapper/sm
 const

src/libnx/wrapper/types.nim

@@ -1,7 +1,7 @@
 import strutils
 import ospaths
 const headertypes = currentSourcePath().splitPath().head & "/nx/include/switch/types.h"
-include libnx/ext/integer128
+import libnx/ext/integer128
 template BIT*(n): auto = (1.uint shl n)
 type
   u8* = uint8