# The argument `color` should be an array of up to 4 floats (RGBA).
# If `color` has less than 4 items, the missing items are replaced by 1.0.
#
- # Require: `not loaded and x < width.to_i and y < height.to_i`
+ # Require: `x < width.to_i and y < height.to_i`
fun []=(x, y: Int, color: Array[Float])
do
- assert not loaded else print_error "{class_name}::[]= already loaded"
assert x < width.to_i and y < height.to_i else print_error "{class_name}::[] out of bounds"
# Simple conversion from [0.0..1.0] to [0..255]
var offset = 4*(x + y*width.to_i)
for i in [0..4[ do cpixels[offset+i] = bytes[i]
+
+ loaded = false
end
# Overwrite all pixels with `color`, return `self`
#
# The argument `color` should be an array of up to 4 floats (RGBA).
# If `color` has less than 4 items, the missing items are replaced by 1.0.
- #
- # Require: `not loaded`
fun fill(color: Array[Float]): SELF
do
- assert not loaded else print_error "{class_name}::fill already loaded"
-
# Simple conversion from [0.0..1.0] to [0..255]
var bytes = [for c in color do (c*255.0).round.to_i.clamp(0, 255).to_bytes.last]
while bytes.length < 4 do bytes.add 255u8
end
end
+ loaded = false
return self
end
redef fun load(force)
do
- if loaded then return
+ force = force or else false
+ if loaded and not force then return
+
+ if force and glIsTexture(gl_texture) then
+ # Was already loaded, free the previous GL name
+ glDeleteTextures([gl_texture])
+ end
+ gl_texture = -1
# Round down the desired dimension
var width = width.to_i
load_from_pixels(cpixels.native_array, width, height, gl_RGBA)
- cpixels.destroy
loaded = true
end
end
private fun load_from_pixels(pixels: Pointer, width, height: Int, format: GLPixelFormat)
do
var max_texture_size = glGetIntegerv(gl_MAX_TEXTURE_SIZE, 0)
- if width > max_texture_size or height > max_texture_size then
- error = new Error("Texture {self} width or height is over the GL_MAX_TEXTURE_SIZE of {max_texture_size}")
+ if width > max_texture_size then
+ error = new Error("Texture width larger than gl_MAX_TEXTURE_SIZE ({max_texture_size}) in {self} at {width}")
+ return
+ else if height > max_texture_size then
+ error = new Error("Texture height larger than gl_MAX_TEXTURE_SIZE ({max_texture_size}) in {self} at {height}")
return
end
# Parent texture, from which this texture was created
var parent: Texture
- redef var root = parent.root is lateinit
+ redef fun root do return parent.root
redef fun load(force) do root.load(force)
end
end
redef class Pointer
- # Multiply RBG values by their alpha value
+ # Multiply RGB values by their alpha value
private fun premultiply_alpha(width, height: Int) `{
uint8_t *bytes = (uint8_t *)self;
int x, y, i = 0;