SIGBUS: Illegal storage access. (Attempt to read from nil?) when usingmakeImage #32
Description
I have an issue trying to render images. I am not sure what's going on because it happen using images with more than 2809 pixels... a size of 53x53 works, but no higher.
One way to test this is loading an image as:
proc getImage(): Image =
var data = newSeq[uint8](0)
var width, height, channels: int
const f = staticRead("./assets/img.png")
data = stbi.loadFromMemory(cast[seq[uint8]](f), width, height, channels, stbi.RGBA)
let desc = sg.ImageDesc(
width: cast[int32](width),
height: cast[int32](height),
data: ImageData(
subimage: [ [ sg.Range(addr: addr data, size: width * height * 4) ] ]
),
)
sg.makeImage(desc)
Another is altering the texcube example to increase the size of the generated texture:
#-------------------------------------------------------------------------------
# texcube.nim
# Texture creation, rendering with texture, packed vertex components.
#-------------------------------------------------------------------------------
import sokol/log as slog
import sokol/gfx as sg
import sokol/app as sapp
import sokol/glue as sglue
import math/vec3
import math/mat4
import shaders/texcube as shd
proc generateCheckerboard(width: int, height: int): seq[uint32] =
var pixels: seq[uint32] = @[]
for y in 0..<height:
for x in 0..<width:
if (x div 8 + y div 8) mod 2 == 0:
pixels.add(0xFFFFFFFF'u32) # white
else:
pixels.add(0xFF000000'u32) # black
return pixels
var
rx, ry: float32
pip: Pipeline
bindings: Bindings
const
passAction = PassAction(
colors: [
ColorAttachmentAction( loadAction: loadActionClear, clearValue: (0.25, 0.5, 0.75, 1.0))
]
)
type Vertex = object
x, y, z: float32
color: uint32
u, v: uint16
proc init() {.cdecl.} =
sg.setup(sg.Desc(
environment: sglue.environment(),
logger: sg.Logger(fn: slog.fn),
))
#[
Cube vertex buffer with packed vertex formats for color and texture coords.
Note that a vertex format which must be portable across all
backends must only use the normalized integer formats
(BYTE4N, UBYTE4N, SHORT2N, SHORT4N), which can be converted
to floating point formats in the vertex shader inputs.
]#
const vertices = [
Vertex( x: -1.0, y: -1.0, z: -1.0, color: 0xFF0000FF'u32, u: 0, v: 0 ),
Vertex( x: 1.0, y: -1.0, z: -1.0, color: 0xFF0000FF'u32, u: 32767, v: 0 ),
Vertex( x: 1.0, y: 1.0, z: -1.0, color: 0xFF0000FF'u32, u: 32767, v: 32767 ),
Vertex( x: -1.0, y: 1.0, z: -1.0, color: 0xFF0000FF'u32, u: 0, v: 32767 ),
Vertex( x: -1.0, y: -1.0, z: 1.0, color: 0xFF00FF00'u32, u: 0, v: 0 ),
Vertex( x: 1.0, y: -1.0, z: 1.0, color: 0xFF00FF00'u32, u: 32767, v: 0 ),
Vertex( x: 1.0, y: 1.0, z: 1.0, color: 0xFF00FF00'u32, u: 32767, v: 32767 ),
Vertex( x: -1.0, y: 1.0, z: 1.0, color: 0xFF00FF00'u32, u: 0, v: 32767 ),
Vertex( x: -1.0, y: -1.0, z: -1.0, color: 0xFFFF0000'u32, u: 0, v: 0 ),
Vertex( x: -1.0, y: 1.0, z: -1.0, color: 0xFFFF0000'u32, u: 32767, v: 0 ),
Vertex( x: -1.0, y: 1.0, z: 1.0, color: 0xFFFF0000'u32, u: 32767, v: 32767 ),
Vertex( x: -1.0, y: -1.0, z: 1.0, color: 0xFFFF0000'u32, u: 0, v: 32767 ),
Vertex( x: 1.0, y: -1.0, z: -1.0, color: 0xFFFF007F'u32, u: 0, v: 0 ),
Vertex( x: 1.0, y: 1.0, z: -1.0, color: 0xFFFF007F'u32, u: 32767, v: 0 ),
Vertex( x: 1.0, y: 1.0, z: 1.0, color: 0xFFFF007F'u32, u: 32767, v: 32767 ),
Vertex( x: 1.0, y: -1.0, z: 1.0, color: 0xFFFF007F'u32, u: 0, v: 32767 ),
Vertex( x: -1.0, y: -1.0, z: -1.0, color: 0xFFFF7F00'u32, u: 0, v: 0 ),
Vertex( x: -1.0, y: -1.0, z: 1.0, color: 0xFFFF7F00'u32, u: 32767, v: 0 ),
Vertex( x: 1.0, y: -1.0, z: 1.0, color: 0xFFFF7F00'u32, u: 32767, v: 32767 ),
Vertex( x: 1.0, y: -1.0, z: -1.0, color: 0xFFFF7F00'u32, u: 0, v: 32767 ),
Vertex( x: -1.0, y: 1.0, z: -1.0, color: 0xFF007FFF'u32, u: 0, v: 0 ),
Vertex( x: -1.0, y: 1.0, z: 1.0, color: 0xFF007FFF'u32, u: 32767, v: 0 ),
Vertex( x: 1.0, y: 1.0, z: 1.0, color: 0xFF007FFF'u32, u: 32767, v: 32767 ),
Vertex( x: 1.0, y: 1.0, z: -1.0, color: 0xFF007FFF'u32, u: 0, v: 32767 ),
]
bindings.vertexBuffers[0] = sg.makeBuffer(BufferDesc(
data: sg.Range(addr: vertices.addr, size: vertices.sizeof)
))
# create an index buffer for the cube
const indices = [
0'u16, 1, 2, 0, 2, 3,
6, 5, 4, 7, 6, 4,
8, 9, 10, 8, 10, 11,
14, 13, 12, 15, 14, 12,
16, 17, 18, 16, 18, 19,
22, 21, 20, 23, 22, 20
]
bindings.indexBuffer = sg.makeBuffer(BufferDesc(
type: bufferTypeIndexBuffer,
data: sg.Range(addr: indices.addr, size: indices.sizeof)
))
let h:int32 = 54
let w:int32 = 53
# create a checker board texture
let pixels = generateCheckerboard(w, h)
bindings.fs.images[shd.slotTex] = sg.makeImage(sg.ImageDesc(
width: w,
height: h,
data: ImageData(
subimage: [ [ sg.Range(addr: pixels.addr, size: w*h*4) ] ]
)
))
# create a matching sampler
bindings.fs.samplers[shd.slotSmp] = sg.makeSampler(sg.SamplerDesc(
minFilter: filterNearest,
magFilter: filterNearest,
));
# shader and pipeline object
pip = sg.makePipeline(PipelineDesc(
shader: sg.makeShader(texcubeShaderDesc(sg.queryBackend())),
layout: VertexLayoutState(
attrs: [
VertexAttrState(format: vertexFormatFloat3), # pos
VertexAttrState(format: vertexFormatUbyte4n), # color0
VertexAttrState(format: vertexFormatShort2n) # texcoord0
]
),
indexType: indexTypeUint16,
cullMode: cullModeBack,
depth: DepthState(
compare: compareFuncLessEqual,
writeEnabled: true
)
))
proc computeVsParams(): shd.VsParams =
let proj = persp(60.0f, sapp.widthf()/sapp.heightf(), 0.01f, 10.0f)
let view = lookat(vec3(0.0f, 1.5f, 6.0f), vec3.zero(), vec3.up())
let rxm = rotate(rx, vec3(1f, 0f, 0f))
let rym = rotate(ry, vec3(0f, 1f, 0f))
let model = rxm * rym
result = VsParams(mvp: proj * view * model)
proc frame() {.cdecl.} =
let dt = sapp.frameDuration() * 60f
rx += 1f * dt
ry += 2f * dt
let vsParams = computeVsParams()
sg.beginPass(Pass(action: passAction, swapchain: sglue.swapchain()))
sg.applyPipeline(pip)
sg.applyBindings(bindings)
sg.applyUniforms(shaderStageVs, shd.slotVsParams, sg.Range(addr: vsParams.addr, size: vsParams.sizeof))
sg.draw(0, 36, 1)
sg.endPass()
sg.commit()
proc cleanup() {.cdecl.} =
sg.shutdown()
sapp.run(sapp.Desc(
initCb: init,
frameCb: frame,
cleanupCb: cleanup,
windowTitle: "texcube.nim",
width: 800,
height: 600,
sampleCount: 4,
icon: IconDesc(sokol_default: true),
logger: sapp.Logger(fn: slog.fn),
))
this will panic at runtime with:
➜ sokol-nim git:(master) ✗ nimble texcube
Verifying dependencies for sokol@0.5.1
Executing task texcube in /Users/nazariglez/personal/sokol-nim/sokol.nimble
Hint: used config file '/opt/homebrew/Cellar/nim/2.0.6/nim/config/nim.cfg' [Conf]
Hint: used config file '/opt/homebrew/Cellar/nim/2.0.6/nim/config/config.nims' [Conf]
..................................................................................
CC: ../../../../../opt/homebrew/Cellar/nim/2.0.6/nim/lib/system.nim
CC: ../../../.nimble/pkgs2/sokol-0.5.5-afa97955f1370ea45bf6b8e512b309004fc9eb6a/sokol/gfx.nim
CC: texcube.nim
Hint: [Link]
ld: warning: ignoring duplicate libraries: '-lm'
Hint: mm: orc; threads: on; opt: none (DEBUG BUILD, `-d:release` generates faster code)
35722 lines; 0.254s; 46.449MiB peakmem; proj: examples/texcube; out: /Users/nazariglez/personal/sokol-nim/build/texcube [SuccessX]
Traceback (most recent call last)
/Users/nazariglez/personal/sokol-nim/examples/texcube.nim(158) texcube
/Users/nazariglez/.nimble/pkgs2/sokol-0.5.5-afa97955f1370ea45bf6b8e512b309004fc9eb6a/sokol/app.nim(560) run
/Users/nazariglez/personal/sokol-nim/examples/texcube.nim(102) init
/Users/nazariglez/.nimble/pkgs2/sokol-0.5.5-afa97955f1370ea45bf6b8e512b309004fc9eb6a/sokol/gfx.nim(1381) makeImage
SIGBUS: Illegal storage access. (Attempt to read from nil?)
stack trace: (most recent call last)
/private/var/folders/zw/1nf4s1_92b1fkgcbgqr604t80000gn/T/nimblecache-1799278598/nimscriptapi_1188391125.nim(211, 16)
/Users/nazariglez/personal/sokol-nim/sokol.nimble(91, 3) texcubeTask
/Users/nazariglez/personal/sokol-nim/sokol.nimble(69, 3) run
/opt/homebrew/Cellar/nim/2.0.6/nim/lib/system/nimscript.nim(265, 7) exec
/opt/homebrew/Cellar/nim/2.0.6/nim/lib/system/nimscript.nim(265, 7) Error: unhandled exception: FAILED: build/texcube [OSError]
Tip: 1 messages have been suppressed, use --verbose to show them.
nimscriptwrapper.nim(161) execScript
Error: Exception raised during nimble script execution
I think that I am missing something, or there is a bug somewhere in nim or the sokol bindings. Does this rings any bell?
Thanks!