58 lines
1.2 KiB
Odin
58 lines
1.2 KiB
Odin
package main
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import "core:c"
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import "core:fmt"
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import "core:os"
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import "core:strconv"
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import "core:strings"
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PPM_MAGIC_NUMBER :: enum {
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P6,
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P3,
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}
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Ppm_file :: struct {
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magic_num: PPM_MAGIC_NUMBER,
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width: int,
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height: int,
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data: []byte,
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}
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load_ppm :: proc(ppm_file: ^Ppm_file, filename: string) -> (success: bool) {
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if !strings.has_suffix(filename, ".ppm") {
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fmt.eprintfln("ERROR: File %s does not have a valid ppm extention (.ppm)", filename)
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return false
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}
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succ: bool
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ppm_file.data, succ = os.read_entire_file_from_filename(filename, context.temp_allocator)
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if !succ {
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fmt.eprintfln("ERROR: Failed to load file: %s ", filename)
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return false
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}
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return true
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}
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ppm_parse :: proc(ppm_file: ^Ppm_file) {
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it := string(ppm_file.data)
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for line in strings.split_lines_iterator(&it) {
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if strings.starts_with(line, "#") {continue} //ignore comments
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if strings.starts_with(line, "P") {
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num, _ := strconv.parse_int(strings.trim(line, "P"))
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if num == 3 {
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ppm_file.magic_num = .P3
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} else if num == 6 {
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ppm_file.magic_num = .P6
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}
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}
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w_h_parts := strings.split(line, " ")
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if len(w_h_parts) == 2 {
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ppm_file.width, _ = strconv.parse_int(w_h_parts[0])
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ppm_file.height, _ = strconv.parse_int(w_h_parts[1])
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}
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}
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}
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