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nonworking dynamic bindings

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Richard Smith 2019-05-21 17:51:54 +01:00
parent 2335c5275f
commit 790ff3fcf6
8 changed files with 119 additions and 31 deletions
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13
README.md
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@ -1,12 +1,14 @@
# Python Bindings for Raylib
These bindings use CFFI rather than ctypes. Hopefully this will be faster, the static type knowledge from the C
This uses CFFI API static bindins rather than ctypes. Hopefully this will be faster, the static type knowledge from the C
headers will result in fewer bugs, and using the original headers will make it easier to maintain.
Currently the goal is make usage as similar to the original C as CFFI will allow. There are a few differences
you can see in the examples. Making a 'Pythonic' library would be an additional layer on top which hasn't been
done yet.
See test.py and examples/*.py for how to use.
# Platforms tested
* MacOS 10.12.6
@ -16,3 +18,12 @@ done yet.
* converting more examples from C to python
* testing and building on more platforms
### Dynamic bindings
I have attempted to do CFFI ABI dynamic bindings too in order to avoid the need to compile a C extension module,
but they don't work properly. They fails to work in the same place the ctypes binding fails, accessing
materials of a model, because Python can't dynamically tell the difference between a pointer and an array. There's probably
some way to specify this (e.g. in raylib_modified.h) but it's difficult to be sure we fixed them all, and the errors
are often completely silent.
See test_static.py for the non-working example.

32
raylib/__init__.py
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@ -2,33 +2,9 @@ __version__ = "2.5.dev1"
from ._raylib_cffi import ffi, lib as rl
from _raylib_cffi.lib import *
from .colors import *
from .helpers import *
def Vector3(x, y, z):
return ffi.new("struct Vector3 *", [x, y, z])[0]
LIGHTGRAY =( 200, 200, 200, 255 )
GRAY =( 130, 130, 130, 255 )
DARKGRAY =( 80, 80, 80, 255 )
YELLOW =( 253, 249, 0, 255 )
GOLD =( 255, 203, 0, 255 )
ORANGE =( 255, 161, 0, 255 )
PINK =( 255, 109, 194, 255 )
RED =( 230, 41, 55, 255 )
MAROON =( 190, 33, 55, 255 )
GREEN =( 0, 228, 48, 255 )
LIME =( 0, 158, 47, 255 )
DARKGREEN =( 0, 117, 44, 255 )
SKYBLUE =( 102, 191, 255, 255 )
BLUE =( 0, 121, 241, 255 )
DARKBLUE =( 0, 82, 172, 255 )
PURPLE =( 200, 122, 255, 255 )
VIOLET =( 135, 60, 190, 255 )
DARKPURPLE =( 112, 31, 126, 255 )
BEIGE =( 211, 176, 131, 255 )
BROWN =( 127, 106, 79, 255 )
DARKBROWN =( 76, 63, 47, 255 )
WHITE =( 255, 255, 255, 255 )
BLACK =( 0, 0, 0, 255 )
BLANK =( 0, 0, 0, 0 )
MAGENTA =( 255, 0, 255, 255 )
RAYWHITE =( 245, 245, 245, 255 )

26
raylib/colors.py Normal file
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@ -0,0 +1,26 @@
LIGHTGRAY =( 200, 200, 200, 255 )
GRAY =( 130, 130, 130, 255 )
DARKGRAY =( 80, 80, 80, 255 )
YELLOW =( 253, 249, 0, 255 )
GOLD =( 255, 203, 0, 255 )
ORANGE =( 255, 161, 0, 255 )
PINK =( 255, 109, 194, 255 )
RED =( 230, 41, 55, 255 )
MAROON =( 190, 33, 55, 255 )
GREEN =( 0, 228, 48, 255 )
LIME =( 0, 158, 47, 255 )
DARKGREEN =( 0, 117, 44, 255 )
SKYBLUE =( 102, 191, 255, 255 )
BLUE =( 0, 121, 241, 255 )
DARKBLUE =( 0, 82, 172, 255 )
PURPLE =( 200, 122, 255, 255 )
VIOLET =( 135, 60, 190, 255 )
DARKPURPLE =( 112, 31, 126, 255 )
BEIGE =( 211, 176, 131, 255 )
BROWN =( 127, 106, 79, 255 )
DARKBROWN =( 76, 63, 47, 255 )
WHITE =( 255, 255, 255, 255 )
BLACK =( 0, 0, 0, 255 )
BLANK =( 0, 0, 0, 0 )
MAGENTA =( 255, 0, 255, 255 )
RAYWHITE =( 245, 245, 245, 255 )

15
raylib/dynamic_binding/__init__.py Normal file
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@ -0,0 +1,15 @@
"""
This is an attempt at a CFFI dynamic (ABI) binding. However, it fails to work in the exactly same place the ctypes binding fails, accessing
materials of a model.
"""
import pathlib
MODULE = pathlib.Path(__file__).parent.parent
from cffi import FFI
ffi = FFI()
ffi.cdef(open(MODULE / "raylib_modified.h").read().replace('RLAPI ', ''))
raylib = ffi.dlopen(str(MODULE)+"/dynamic_binding/libraylib.2.dylib")

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raylib/dynamic_binding/libraylib.2.dylib Executable file
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raylib/helpers.py Normal file
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@ -0,0 +1,5 @@
from ._raylib_cffi import ffi
def Vector3(x, y, z):
return ffi.new("struct Vector3 *", [x, y, z])[0]

52
test_dynamic.py Normal file
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@ -0,0 +1,52 @@
"""
This is an attempt at a CFFI dynamic (ABI) binding. However, it fails to work in the same place the ctypes binding fails, accessing
materials of a model, because Python can't dynamically tell the difference between a pointer and an array. There's probably
some way to specify this (e.g. in raylib_modified.h) but it's difficult to be sure we fixed them all, and the errors
are often completely silent.
"""
import pathlib
MODULE = pathlib.Path(__file__).parent
print(MODULE)
from raylib.dynamic_binding import ffi, raylib as rl
from raylib.colors import *
rl.InitWindow(800,450,b"foo")
rl.SetTargetFPS(60)
camera = ffi.new("struct Camera3D *", [[ 18.0, 16.0, 18.0 ], [ 0.0, 0.0, 0.0 ], [ 0.0, 1.0, 0.0 ], 45.0, 0 ])
imageFile = str(MODULE / "examples/models/resources/heightmap.png").encode('utf-8')
image = rl.LoadImage(imageFile) # Load heightmap image (RAM)
print(image)
texture = rl.LoadTextureFromImage(image) # Convert image to texture (VRAM)
mesh = rl.GenMeshHeightmap(image, [ 16, 8, 16 ]) # Generate heightmap mesh (RAM and VRAM)
print(mesh)
model = rl.LoadModelFromMesh(mesh) # Load model from generated mesh
print(model.materials) # SHOULD BE A pointer to a 'struct Material' but instead is NULL pointer to 'Material'
#model.materials[0].maps[rl.MAP_DIFFUSE].texture = texture # Set map diffuse texture
mapPosition = ( -8.0, 0.0, -8.0 ) # Define model position
rl.UnloadImage(image) # Unload heightmap image from RAM, already uploaded to VRAM
rl.SetCameraMode(camera[0], rl.CAMERA_ORBITAL) # Set an orbital camera mode
while not rl.WindowShouldClose():
rl.UpdateCamera(camera)
rl.BeginDrawing()
rl.ClearBackground(RAYWHITE)
rl.BeginMode3D(camera[0])
rl.DrawModel(model, mapPosition, 1.0, RED)
rl.DrawGrid(20, 1.0)
rl.EndMode3D()
rl.DrawText(b"sdfsdf", 190, 200, 20, BLACK)
rl.EndDrawing()
rl.CloseWindow()

7
test.py → test_static.py
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@ -4,17 +4,20 @@ from raylib import *
InitWindow(800,450,b"foo")
SetTargetFPS(60)
print(Vector3(1,1,1))
camera = ffi.new("struct Camera3D *", [[ 18.0, 16.0, 18.0 ], [ 0.0, 0.0, 0.0 ], [ 0.0, 1.0, 0.0 ], 45.0, 0 ])
image = LoadImage(b"resources/heightmap.png") # Load heightmap image (RAM)
image = LoadImage(b"examples/models/resources/heightmap.png") # Load heightmap image (RAM)
texture = LoadTextureFromImage(image) # Convert image to texture (VRAM)
mesh = GenMeshHeightmap(image, ( 16, 8, 16 )) # Generate heightmap mesh (RAM and VRAM)
print(mesh)
model = LoadModelFromMesh(mesh) # Load model from generated mesh
print(model.materials)
model.materials[0].maps[MAP_DIFFUSE].texture = texture # Set map diffuse texture
mapPosition = ( -8.0, 0.0, -8.0 ) # Define model position