diff options
Diffstat (limited to 'example')
| -rwxr-xr-x | example/build.sh | 7 | ||||
| -rw-r--r-- | example/cli.c | 31 | ||||
| -rw-r--r-- | example/common.h | 29 | ||||
| -rw-r--r-- | example/example.c | 27 | ||||
| -rw-r--r-- | example/image.tga | bin | 0 -> 1068 bytes | |||
| -rw-r--r-- | example/tga.c | 145 |
6 files changed, 239 insertions, 0 deletions
diff --git a/example/build.sh b/example/build.sh new file mode 100755 index 0000000..26383e2 --- /dev/null +++ b/example/build.sh @@ -0,0 +1,7 @@ +#!/bin/sh -e + +cc -std=c89 -Wall -Wextra -pedantic -O3 ../bin2c.c -o bin2c +./bin2c image.tga +cc -std=c89 -Wall -Wextra -pedantic -O3 example.c -o example + +./example diff --git a/example/cli.c b/example/cli.c new file mode 100644 index 0000000..f3e81e0 --- /dev/null +++ b/example/cli.c @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2024 dwlr <dweller@cabin.digital> + * + * BSD 3-Clause License (BSD-3-Clause) + * See LICENSE for details + */ + +#define ESC "\x1B" +#define CSI ESC"[" + +void cli_draw_tex(texture* tex, bool bw) +{ + ssize x, y; + + for(y = 0; y < tex->height; y++) + { + for(x = 0; x < tex->width; x++) + { + rgba* p = tex->texels + (x + tex->width * y); + if(p->A == 0) printf(CSI"0m "); + else + { + if(bw) printf("##"); + else printf(CSI"48;2;%d;%d;%dm ", p->R, p->G, p->B); + } + } + + printf(CSI"0m\n"); + } +} + diff --git a/example/common.h b/example/common.h new file mode 100644 index 0000000..9e6f7b9 --- /dev/null +++ b/example/common.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2024 dwlr <dweller@cabin.digital> + * + * BSD 3-Clause License (BSD-3-Clause) + * See LICENSE for details + */ + +#pragma once +#pragma GCC diagnostic ignored "-Wlong-long" + +typedef unsigned char u8; +typedef unsigned short u16; +typedef unsigned int u32; +typedef unsigned long long u64; /* XXX: GCC extension */ +typedef signed char s8; +typedef signed short s16; +typedef signed int s32; +typedef signed long long s64; /* XXX: GCC extension */ + +typedef s8 bool; + +typedef u64 usize; +typedef s64 ssize; + +#define true 1 +#define false 0 + +#define packed __attribute__((packed)) + diff --git a/example/example.c b/example/example.c new file mode 100644 index 0000000..8f6a1bc --- /dev/null +++ b/example/example.c @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2024 dwlr <dweller@cabin.digital> + * + * BSD 3-Clause License (BSD-3-Clause) + * See LICENSE for details + */ + +#include <stdio.h> + +#include "common.h" +#include "tga.c" +#include "cli.c" + + +const u8 image[] = +{ + #include "image.tga.h" +}; + +int main(void) +{ + texture tex = {0}; + tga2tex_from_mem(&tex, image, sizeof(image)); + cli_draw_tex(&tex, true); /* true - Black&White, false - True Color */ + + return 0; +} diff --git a/example/image.tga b/example/image.tga Binary files differnew file mode 100644 index 0000000..b9eff45 --- /dev/null +++ b/example/image.tga diff --git a/example/tga.c b/example/tga.c new file mode 100644 index 0000000..6e8eb34 --- /dev/null +++ b/example/tga.c @@ -0,0 +1,145 @@ +/* + * Copyright (C) 2024 dwlr <dweller@cabin.digital> + * + * BSD 3-Clause License (BSD-3-Clause) + * See LICENSE for details + */ + +#include <stdlib.h> +#include <string.h> +#include <assert.h> + +#include <unistd.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <fcntl.h> + + +typedef struct packed tga_hdr +{ + u8 id_len; + u8 cmap_type; + u8 img_type; + + struct packed + { + u16 first_entry_idx; + u16 length; + u8 entry_size; + + } cmap_spec; + + struct packed + { + u16 xorig; + u16 yorig; + u16 width; + u16 height; + u8 depth; + u8 desc; + + } img_spec; + +} tga_hdr; + +typedef enum tga_img_type +{ + TGA_IMG_NONE, + TGA_IMG_RAW_CMAP, + TGA_IMG_RAW_TRUE, + TGA_IMG_RAW_BW, + TGA_IMG_RLE_CMAP, + TGA_IMG_RLE_TRUE, + TGA_IMG_RLE_BW, + + TGA_IMG_TYPE_SIZE + +} tga_img_type; + +typedef union rgba +{ + u32 rgba; + struct + { + u8 b; + u8 g; + u8 r; + u8 a; + } c; + +} rgba; + +#define A c.a +#define R c.r +#define G c.g +#define B c.b + +typedef struct texture +{ + ssize width; + ssize height; + + rgba* texels; + +} texture; + + +bool tga2tex_from_mem(texture* tex, const u8* data, ssize sz) +{ + tga_hdr* hdr = NULL; + rgba* img_dat = NULL; + + assert(tex); + assert(data); + assert(sz > 0); + + hdr = (tga_hdr*)data; + if(hdr->img_type != TGA_IMG_RAW_TRUE) return false; + if(hdr->cmap_type) return false; + + /* FIXME(dwlr): check pixel depth */ + /* FIXME(dwlr): check bit 5 and 4 of img_spec.desc (ordering) */ + + tex->width = hdr->img_spec.width; + tex->height = hdr->img_spec.height; + + sz = sizeof(*tex->texels) * tex->width * tex->height; + tex->texels = malloc(sz); + + img_dat = (rgba*)(((u8*)hdr) + sizeof(*hdr) + hdr->id_len); + + /* FIXME(dwlr): convert if needed */ + memcpy(tex->texels, img_dat, sz); + + return true; +} + + +bool tga2tex_from_file(texture* tex, const char* path) +{ + struct stat stat = {0}; + + bool ret = false; + s32 fd = -1; + ssize sz = 0; + u8* file = NULL; + + assert(tex); + assert(path); + + fd = open(path, O_RDONLY); + if(fd < 0) goto clean_close; + + if(fstat(fd, &stat) != 0) goto clean_close; + + file = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0); + if(file == MAP_FAILED) goto clean_close; + + ret = tga2tex_from_mem(tex, file, sz); + + munmap(file, stat.st_size); +clean_close: + close(fd); + + return ret; +} |