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Merge pull request #202 from HappySeaFox/feature/pnm
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| Original file line number | Diff line number | Diff line change |
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| # Common codec configuration | ||
| # | ||
| sail_codec(NAME pnm SOURCES helpers.h helpers.c pnm.c ICON pnm.png) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,169 @@ | ||
| /* This file is part of SAIL (https://github.com/HappySeaFox/sail) | ||
| Copyright (c) 2023 Dmitry Baryshev | ||
| The MIT License | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ | ||
|
|
||
| #include <ctype.h> | ||
| #include <stdbool.h> | ||
| #include <stdint.h> | ||
| #include <stdio.h> | ||
|
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| #include <sail-common/sail-common.h> | ||
|
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| #include "helpers.h" | ||
|
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| sail_status_t pnm_private_skip_to_letters_numbers_force_read(struct sail_io *io, char *first_char) { | ||
|
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| char c; | ||
|
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| do { | ||
| SAIL_TRY(io->strict_read(io->stream, &c, 1)); | ||
|
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| if (c == '#') { | ||
| do { | ||
| SAIL_TRY(io->strict_read(io->stream, &c, 1)); | ||
| } while(c != '\n'); | ||
| } | ||
| } while (!isalnum(c)); | ||
|
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| *first_char = c; | ||
|
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| return SAIL_OK; | ||
| } | ||
|
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| sail_status_t pnm_private_skip_to_letters_numbers(struct sail_io *io, char starting_char, char *first_char) { | ||
|
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| if (isalnum(starting_char)) { | ||
| *first_char = starting_char; | ||
| return SAIL_OK; | ||
| } | ||
|
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| SAIL_TRY(pnm_private_skip_to_letters_numbers_force_read(io, first_char)); | ||
|
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| return SAIL_OK; | ||
| } | ||
|
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| sail_status_t pnm_private_read_word(struct sail_io *io, char *str, size_t str_size) { | ||
|
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| if (str_size < 2) { | ||
| SAIL_LOG_AND_RETURN(SAIL_ERROR_INVALID_ARGUMENT); | ||
| } | ||
|
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| char first_char; | ||
| SAIL_TRY(pnm_private_skip_to_letters_numbers(io, SAIL_PNM_INVALID_STARTING_CHAR, &first_char)); | ||
|
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| unsigned i = 0; | ||
| char c = first_char; | ||
|
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| bool eof; | ||
| SAIL_TRY(io->eof(io->stream, &eof)); | ||
|
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| sail_status_t saved_status = SAIL_OK; | ||
|
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| while (isalnum(c) && i < str_size - 1 && !eof) { | ||
| *(str + i++) = c; | ||
| SAIL_TRY_OR_EXECUTE(io->strict_read(io->stream, &c, 1), | ||
| /* on error */ saved_status = __sail_status); | ||
| SAIL_TRY(io->eof(io->stream, &eof)); | ||
|
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| if (saved_status != SAIL_OK && !eof) { | ||
| return saved_status; | ||
| } | ||
| } | ||
|
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| /* The buffer is full but no word delimiter found. */ | ||
| if (i == str_size - 1 && !eof) { | ||
| SAIL_LOG_ERROR("PNM: No word delimiter found"); | ||
| SAIL_LOG_AND_RETURN(SAIL_ERROR_BROKEN_IMAGE); | ||
| } | ||
|
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| *(str + i) = '\0'; | ||
|
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| return SAIL_OK; | ||
| } | ||
|
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| sail_status_t pnm_private_read_pixels(struct sail_io *io, struct sail_image *image, unsigned channels, unsigned bpc, double multiplier_to_full_range) { | ||
|
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| for (unsigned row = 0; row < image->height; row++) { | ||
| uint8_t *scan8 = sail_scan_line(image, row); | ||
| uint16_t *scan16 = sail_scan_line(image, row); | ||
|
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| for (unsigned column = 0; column < image->width; column++) { | ||
| for(unsigned channel = 0; channel < channels; channel++) { | ||
| char buffer[8]; | ||
| SAIL_TRY(pnm_private_read_word(io, buffer, sizeof(buffer))); | ||
|
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| unsigned value; | ||
| #ifdef _MSC_VER | ||
| if (sscanf_s(buffer, "%u", &value) != 1) { | ||
| #else | ||
| if (sscanf(buffer, "%u", &value) != 1) { | ||
| #endif | ||
| SAIL_LOG_ERROR("PNM: Failed to read color value"); | ||
| SAIL_LOG_AND_RETURN(SAIL_ERROR_BROKEN_IMAGE); | ||
| } | ||
|
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| if (SAIL_LIKELY(bpc == 8)) { | ||
| *scan8++ = (uint8_t)(value * multiplier_to_full_range); | ||
| } else { | ||
| *scan16++ = (uint16_t)(value * multiplier_to_full_range); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| return SAIL_OK; | ||
| } | ||
|
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| enum SailPixelFormat pnm_private_rgb_sail_pixel_format(enum SailPnmVersion pnm_version, unsigned bpc) { | ||
|
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| switch (pnm_version) { | ||
| case SAIL_PNM_VERSION_P1: | ||
| case SAIL_PNM_VERSION_P4: return SAIL_PIXEL_FORMAT_BPP1_INDEXED; | ||
|
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| case SAIL_PNM_VERSION_P2: | ||
| case SAIL_PNM_VERSION_P5: { | ||
| switch (bpc) { | ||
| case 8: return SAIL_PIXEL_FORMAT_BPP8_GRAYSCALE; | ||
| case 16: return SAIL_PIXEL_FORMAT_BPP16_GRAYSCALE; | ||
|
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| default: return SAIL_PIXEL_FORMAT_UNKNOWN; | ||
| } | ||
| } | ||
|
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| case SAIL_PNM_VERSION_P3: | ||
| case SAIL_PNM_VERSION_P6: { | ||
| switch (bpc) { | ||
| case 8: return SAIL_PIXEL_FORMAT_BPP24_RGB; | ||
| case 16: return SAIL_PIXEL_FORMAT_BPP48_RGB; | ||
|
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| default: return SAIL_PIXEL_FORMAT_UNKNOWN; | ||
| } | ||
| } | ||
|
|
||
| default: { | ||
| return SAIL_PIXEL_FORMAT_UNKNOWN; | ||
| } | ||
| } | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* This file is part of SAIL (https://github.com/HappySeaFox/sail) | ||
| Copyright (c) 2023 Dmitry Baryshev | ||
| The MIT License | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ | ||
|
|
||
| #ifndef SAIL_PNM_HELPERS_H | ||
| #define SAIL_PNM_HELPERS_H | ||
|
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| #include <stddef.h> /* size_t */ | ||
|
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| #include <sail-common/common.h> | ||
| #include <sail-common/export.h> | ||
| #include <sail-common/status.h> | ||
|
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| struct sail_image; | ||
| struct sail_io; | ||
|
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| enum SailPnmVersion { | ||
| SAIL_PNM_VERSION_P1, | ||
| SAIL_PNM_VERSION_P2, | ||
| SAIL_PNM_VERSION_P3, | ||
| SAIL_PNM_VERSION_P4, | ||
| SAIL_PNM_VERSION_P5, | ||
| SAIL_PNM_VERSION_P6, | ||
| }; | ||
|
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| static const char SAIL_PNM_INVALID_STARTING_CHAR = '\0'; | ||
|
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| SAIL_HIDDEN sail_status_t pnm_private_skip_to_letters_numbers_force_read(struct sail_io *io, char *first_char); | ||
|
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| SAIL_HIDDEN sail_status_t pnm_private_skip_to_letters_numbers(struct sail_io *io, char starting_char, char *first_char); | ||
|
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| SAIL_HIDDEN sail_status_t pnm_private_read_word(struct sail_io *io, char *str, size_t str_size); | ||
|
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| SAIL_HIDDEN sail_status_t pnm_private_read_pixels(struct sail_io *io, struct sail_image *image, unsigned channels, unsigned bpc, double multiplier_to_full_range); | ||
|
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| SAIL_HIDDEN enum SailPixelFormat pnm_private_rgb_sail_pixel_format(enum SailPnmVersion pnm_version, unsigned bpc); | ||
|
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||
| #endif |
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