mirror of
https://github.com/Ed94/Odin.git
synced 2026-08-06 23:58:50 +00:00
Add additional error checking to helpers.
This commit is contained in:
Jeroen van Rijn
+78
-77
@@ -41,7 +41,7 @@ main :: proc() {
|
||||
demo :: proc() {
|
||||
file: string
|
||||
|
||||
options := image.Options{} // {.return_metadata};
|
||||
options := image.Options{.return_metadata}
|
||||
err: compress.Error
|
||||
img: ^image.Image
|
||||
|
||||
@@ -53,23 +53,26 @@ demo :: proc() {
|
||||
if err != nil {
|
||||
fmt.printf("Trying to read PNG file %v returned %v\n", file, err)
|
||||
} else {
|
||||
v: ^Info
|
||||
|
||||
fmt.printf("Image: %vx%vx%v, %v-bit.\n", img.width, img.height, img.channels, img.depth)
|
||||
if img.metadata_ptr != nil && img.metadata_type == Info {
|
||||
v = (^Info)(img.metadata_ptr)
|
||||
|
||||
// Handle ancillary chunks as you wish.
|
||||
// We provide helper functions for a few types.
|
||||
for c in v.chunks {
|
||||
#partial switch c.header.type {
|
||||
case .tIME:
|
||||
t, _ := core_time(c)
|
||||
assert(img.metadata_ptr != nil && img.metadata_type == Info)
|
||||
|
||||
v := (^Info)(img.metadata_ptr)
|
||||
|
||||
// Handle ancillary chunks as you wish.
|
||||
// We provide helper functions for a few types.
|
||||
for c in v.chunks {
|
||||
#partial switch c.header.type {
|
||||
case .tIME:
|
||||
if t, t_ok := core_time(c); t_ok {
|
||||
fmt.printf("[tIME]: %v\n", t)
|
||||
case .gAMA:
|
||||
fmt.printf("[gAMA]: %v\n", gamma(c))
|
||||
case .pHYs:
|
||||
phys := phys(c)
|
||||
}
|
||||
case .gAMA:
|
||||
if gama, gama_ok := gamma(c); gama_ok {
|
||||
fmt.printf("[gAMA]: %v\n", gama)
|
||||
}
|
||||
case .pHYs:
|
||||
if phys, phys_ok := phys(c); phys_ok {
|
||||
if phys.unit == .Meter {
|
||||
xm := f32(img.width) / f32(phys.ppu_x)
|
||||
ym := f32(img.height) / f32(phys.ppu_y)
|
||||
@@ -80,73 +83,71 @@ demo :: proc() {
|
||||
} else {
|
||||
fmt.printf("[pHYs] x: %v, y: %v pixels per unknown unit.\n", phys.ppu_x, phys.ppu_y)
|
||||
}
|
||||
case .iTXt, .zTXt, .tEXt:
|
||||
res, ok_text := text(c)
|
||||
if ok_text {
|
||||
if c.header.type == .iTXt {
|
||||
fmt.printf("[iTXt] %v (%v:%v): %v\n", res.keyword, res.language, res.keyword_localized, res.text)
|
||||
} else {
|
||||
fmt.printf("[tEXt/zTXt] %v: %v\n", res.keyword, res.text)
|
||||
}
|
||||
}
|
||||
defer text_destroy(res)
|
||||
case .bKGD:
|
||||
fmt.printf("[bKGD] %v\n", img.background)
|
||||
case .eXIf:
|
||||
res, ok_exif := exif(c)
|
||||
if ok_exif {
|
||||
/*
|
||||
Other than checking the signature and byte order, we don't handle Exif data.
|
||||
If you wish to interpret it, pass it to an Exif parser.
|
||||
*/
|
||||
fmt.printf("[eXIf] %v\n", res)
|
||||
}
|
||||
case .PLTE:
|
||||
plte, plte_ok := plte(c)
|
||||
if plte_ok {
|
||||
fmt.printf("[PLTE] %v\n", plte)
|
||||
} else {
|
||||
fmt.printf("[PLTE] Error\n")
|
||||
}
|
||||
case .hIST:
|
||||
res, ok_hist := hist(c)
|
||||
if ok_hist {
|
||||
fmt.printf("[hIST] %v\n", res)
|
||||
}
|
||||
case .cHRM:
|
||||
res, ok_chrm := chrm(c)
|
||||
if ok_chrm {
|
||||
fmt.printf("[cHRM] %v\n", res)
|
||||
}
|
||||
case .sPLT:
|
||||
res, ok_splt := splt(c)
|
||||
if ok_splt {
|
||||
fmt.printf("[sPLT] %v\n", res)
|
||||
}
|
||||
splt_destroy(res)
|
||||
case .sBIT:
|
||||
if res, ok_sbit := sbit(c); ok_sbit {
|
||||
fmt.printf("[sBIT] %v\n", res)
|
||||
}
|
||||
case .iCCP:
|
||||
res, ok_iccp := iccp(c)
|
||||
if ok_iccp {
|
||||
fmt.printf("[iCCP] %v\n", res)
|
||||
}
|
||||
iccp_destroy(res)
|
||||
case .sRGB:
|
||||
if res, ok_srgb := srgb(c); ok_srgb {
|
||||
fmt.printf("[sRGB] Rendering intent: %v\n", res)
|
||||
}
|
||||
case:
|
||||
type := c.header.type
|
||||
name := chunk_type_to_name(&type)
|
||||
fmt.printf("[%v]: %v\n", name, c.data)
|
||||
}
|
||||
case .iTXt, .zTXt, .tEXt:
|
||||
res, ok_text := text(c)
|
||||
if ok_text {
|
||||
if c.header.type == .iTXt {
|
||||
fmt.printf("[iTXt] %v (%v:%v): %v\n", res.keyword, res.language, res.keyword_localized, res.text)
|
||||
} else {
|
||||
fmt.printf("[tEXt/zTXt] %v: %v\n", res.keyword, res.text)
|
||||
}
|
||||
}
|
||||
defer text_destroy(res)
|
||||
case .bKGD:
|
||||
fmt.printf("[bKGD] %v\n", img.background)
|
||||
case .eXIf:
|
||||
if res, ok_exif := exif(c); ok_exif {
|
||||
/*
|
||||
Other than checking the signature and byte order, we don't handle Exif data.
|
||||
If you wish to interpret it, pass it to an Exif parser.
|
||||
*/
|
||||
fmt.printf("[eXIf] %v\n", res)
|
||||
}
|
||||
case .PLTE:
|
||||
if plte, plte_ok := plte(c); plte_ok {
|
||||
fmt.printf("[PLTE] %v\n", plte)
|
||||
} else {
|
||||
fmt.printf("[PLTE] Error\n")
|
||||
}
|
||||
case .hIST:
|
||||
if res, ok_hist := hist(c); ok_hist {
|
||||
fmt.printf("[hIST] %v\n", res)
|
||||
}
|
||||
case .cHRM:
|
||||
if res, ok_chrm := chrm(c); ok_chrm {
|
||||
fmt.printf("[cHRM] %v\n", res)
|
||||
}
|
||||
case .sPLT:
|
||||
res, ok_splt := splt(c)
|
||||
if ok_splt {
|
||||
fmt.printf("[sPLT] %v\n", res)
|
||||
}
|
||||
splt_destroy(res)
|
||||
case .sBIT:
|
||||
if res, ok_sbit := sbit(c); ok_sbit {
|
||||
fmt.printf("[sBIT] %v\n", res)
|
||||
}
|
||||
case .iCCP:
|
||||
res, ok_iccp := iccp(c)
|
||||
if ok_iccp {
|
||||
fmt.printf("[iCCP] %v\n", res)
|
||||
}
|
||||
iccp_destroy(res)
|
||||
case .sRGB:
|
||||
if res, ok_srgb := srgb(c); ok_srgb {
|
||||
fmt.printf("[sRGB] Rendering intent: %v\n", res)
|
||||
}
|
||||
case:
|
||||
type := c.header.type
|
||||
name := chunk_type_to_name(&type)
|
||||
fmt.printf("[%v]: %v\n", name, c.data)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fmt.printf("Done parsing metadata.\n")
|
||||
|
||||
if err == nil && .do_not_decompress_image not_in options && .info not_in options {
|
||||
if ok := write_image_as_ppm("out.ppm", img); ok {
|
||||
fmt.println("Saved decoded image.")
|
||||
|
||||
Reference in New Issue
Block a user