mirror of
https://github.com/Ed94/Odin.git
synced 2026-08-05 07:08:48 +00:00
png: Move metadata.
This commit is contained in:
Jeroen van Rijn
+82
-84
@@ -53,93 +53,91 @@ demo :: proc() {
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} else {
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fmt.printf("Image: %vx%vx%v, %v-bit.\n", img.width, img.height, img.channels, img.depth)
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assert(img.metadata_ptr != nil && img.metadata_type == Info)
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v := (^Info)(img.metadata_ptr)
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// Handle ancillary chunks as you wish.
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// We provide helper functions for a few types.
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for c in v.chunks {
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#partial switch c.header.type {
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case .tIME:
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if t, t_ok := core_time(c); t_ok {
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fmt.printf("[tIME]: %v\n", t)
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}
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case .gAMA:
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if gama, gama_ok := gamma(c); gama_ok {
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fmt.printf("[gAMA]: %v\n", gama)
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}
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case .pHYs:
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if phys, phys_ok := phys(c); phys_ok {
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if phys.unit == .Meter {
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xm := f32(img.width) / f32(phys.ppu_x)
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ym := f32(img.height) / f32(phys.ppu_y)
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dpi_x, dpi_y := phys_to_dpi(phys)
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fmt.printf("[pHYs] Image resolution is %v x %v pixels per meter.\n", phys.ppu_x, phys.ppu_y)
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fmt.printf("[pHYs] Image resolution is %v x %v DPI.\n", dpi_x, dpi_y)
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fmt.printf("[pHYs] Image dimensions are %v x %v meters.\n", xm, ym)
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} else {
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fmt.printf("[pHYs] x: %v, y: %v pixels per unknown unit.\n", phys.ppu_x, phys.ppu_y)
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if v, ok := img.metadata.(^image.PNG_Info); ok {
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// Handle ancillary chunks as you wish.
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// We provide helper functions for a few types.
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for c in v.chunks {
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#partial switch c.header.type {
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case .tIME:
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if t, t_ok := core_time(c); t_ok {
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fmt.printf("[tIME]: %v\n", t)
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}
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}
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case .iTXt, .zTXt, .tEXt:
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res, ok_text := text(c)
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if ok_text {
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if c.header.type == .iTXt {
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fmt.printf("[iTXt] %v (%v:%v): %v\n", res.keyword, res.language, res.keyword_localized, res.text)
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} else {
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fmt.printf("[tEXt/zTXt] %v: %v\n", res.keyword, res.text)
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case .gAMA:
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if gama, gama_ok := gamma(c); gama_ok {
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fmt.printf("[gAMA]: %v\n", gama)
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}
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case .pHYs:
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if phys, phys_ok := phys(c); phys_ok {
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if phys.unit == .Meter {
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xm := f32(img.width) / f32(phys.ppu_x)
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ym := f32(img.height) / f32(phys.ppu_y)
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dpi_x, dpi_y := phys_to_dpi(phys)
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fmt.printf("[pHYs] Image resolution is %v x %v pixels per meter.\n", phys.ppu_x, phys.ppu_y)
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fmt.printf("[pHYs] Image resolution is %v x %v DPI.\n", dpi_x, dpi_y)
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fmt.printf("[pHYs] Image dimensions are %v x %v meters.\n", xm, ym)
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} else {
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fmt.printf("[pHYs] x: %v, y: %v pixels per unknown unit.\n", phys.ppu_x, phys.ppu_y)
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}
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}
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case .iTXt, .zTXt, .tEXt:
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res, ok_text := text(c)
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if ok_text {
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if c.header.type == .iTXt {
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fmt.printf("[iTXt] %v (%v:%v): %v\n", res.keyword, res.language, res.keyword_localized, res.text)
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} else {
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fmt.printf("[tEXt/zTXt] %v: %v\n", res.keyword, res.text)
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}
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}
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defer text_destroy(res)
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case .bKGD:
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fmt.printf("[bKGD] %v\n", img.background)
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case .eXIf:
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if res, ok_exif := exif(c); ok_exif {
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/*
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Other than checking the signature and byte order, we don't handle Exif data.
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If you wish to interpret it, pass it to an Exif parser.
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*/
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fmt.printf("[eXIf] %v\n", res)
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}
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case .PLTE:
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if plte, plte_ok := plte(c); plte_ok {
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fmt.printf("[PLTE] %v\n", plte)
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} else {
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fmt.printf("[PLTE] Error\n")
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}
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case .hIST:
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if res, ok_hist := hist(c); ok_hist {
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fmt.printf("[hIST] %v\n", res)
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}
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case .cHRM:
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if res, ok_chrm := chrm(c); ok_chrm {
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fmt.printf("[cHRM] %v\n", res)
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}
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case .sPLT:
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res, ok_splt := splt(c)
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if ok_splt {
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fmt.printf("[sPLT] %v\n", res)
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}
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splt_destroy(res)
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case .sBIT:
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if res, ok_sbit := sbit(c); ok_sbit {
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fmt.printf("[sBIT] %v\n", res)
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}
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case .iCCP:
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res, ok_iccp := iccp(c)
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if ok_iccp {
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fmt.printf("[iCCP] %v\n", res)
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}
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iccp_destroy(res)
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case .sRGB:
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if res, ok_srgb := srgb(c); ok_srgb {
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fmt.printf("[sRGB] Rendering intent: %v\n", res)
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}
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case:
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type := c.header.type
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name := chunk_type_to_name(&type)
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fmt.printf("[%v]: %v\n", name, c.data)
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}
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defer text_destroy(res)
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case .bKGD:
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fmt.printf("[bKGD] %v\n", img.background)
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case .eXIf:
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if res, ok_exif := exif(c); ok_exif {
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/*
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Other than checking the signature and byte order, we don't handle Exif data.
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If you wish to interpret it, pass it to an Exif parser.
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*/
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fmt.printf("[eXIf] %v\n", res)
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}
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case .PLTE:
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if plte, plte_ok := plte(c); plte_ok {
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fmt.printf("[PLTE] %v\n", plte)
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} else {
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fmt.printf("[PLTE] Error\n")
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}
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case .hIST:
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if res, ok_hist := hist(c); ok_hist {
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fmt.printf("[hIST] %v\n", res)
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}
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case .cHRM:
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if res, ok_chrm := chrm(c); ok_chrm {
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fmt.printf("[cHRM] %v\n", res)
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}
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case .sPLT:
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res, ok_splt := splt(c)
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if ok_splt {
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fmt.printf("[sPLT] %v\n", res)
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}
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splt_destroy(res)
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case .sBIT:
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if res, ok_sbit := sbit(c); ok_sbit {
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fmt.printf("[sBIT] %v\n", res)
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}
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case .iCCP:
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res, ok_iccp := iccp(c)
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if ok_iccp {
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fmt.printf("[iCCP] %v\n", res)
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}
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iccp_destroy(res)
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case .sRGB:
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if res, ok_srgb := srgb(c); ok_srgb {
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fmt.printf("[sRGB] Rendering intent: %v\n", res)
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}
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case:
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type := c.header.type
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name := chunk_type_to_name(&type)
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fmt.printf("[%v]: %v\n", name, c.data)
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}
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}
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}
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