最初コミット

.gitignore

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+sprite.tga
+pixed

CHANGELOG.md

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+# 0.1.0
+* 開始

LICENSE.txt

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+Copyright © 2004-2011 by Internet Systems Consortium, Inc. ("ISC")
+Copyright © 2018-2024 by 076.moe
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD
+TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.

Makefile

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+NAME=pixed
+VERSION=0.1.0
+PREFIX=/usr/local
+CC=cc
+FILES=main.c src/*.c
+CFLAGS=-Wall -Wextra -g
+LIBS=-lSDL2
+LDFLAGS=-L${PREFIX}/lib
+CPPFLAGS=-I${PREFIX}/include
+
+all:
+	${CC} ${CFLAGS} ${CPPFLAGS} -o ${NAME} ${FILES} ${LDFLAGS} ${LIBS}
+
+clean:
+	rm -f ${NAME}
+
+dist: clean
+	mkdir -p ${NAME}-${VERSION}
+	cp -R LICENSE.txt Makefile README.md CHANGELOG.md\
+		*.c src ${NAME}-${VERSION}
+	tar zcfv ${NAME}-${VERSION}.tar.gz ${NAME}-${VERSION}
+	rm -rf ${NAME}-${VERSION}
+
+install: all
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f ${NAME} ${DESTDIR}${PREFIX}/bin
+	chmod 755 ${DESTDIR}${PREFIX}/bin/${NAME}
+
+uninstall:
+	rm -f ${DESTDIR}${PREFIX}/bin/${NAME}
+
+.PHONY: all clean install uninstall

README.md

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+# mivfx - minimarist image view for x
+ミニマリストな画像ビューアー
+
+# インストールする方法
+
+## OpenBSD
+```sh
+doas pkg_add sdl2 sdl2_image curl
+make
+doas make install
+```
+
+## FreeBSD
+```sh
+doas pkg install sdl2 sdl2_image curl
+make
+doas make install
+```
+
+## NetBSD
+```sh
+doas pkgin install SDL2-2.28.5 SDL2_image curl
+make PREFIX=/usr/pkg
+doas make install PREFIX=/usr/pkg
+```
+
+## CRUX
+```sh
+doas prt-get depinst libsdl2 sdl2_image curl
+make PREFIX=/usr
+doas make install PREFIX=/usr
+```
+
+## Void Linux
+```sh
+doas xbps-install -S SDL2 SDL2_image curl
+make PREFIX=/usr
+doas make install PREFIX=/usr
+```
+
+## Artix Linux
+```sh
+doas pacman -S sdl2 sdl2_image curl
+make PREFIX=/usr
+doas make install PREFIX=/usr
+```
+
+## Devuan GNU/Linux
+```sh
+doas apt install libsdl2-dev libsdl2-image-dev libcurl4
+make PREFIX=/usr
+doas make install PREFIX=/usr
+```

main.c

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+#include <SDL2/SDL.h>
+#include <stdio.h>
+
+#include "src/export.h"
+#include "src/input.h"
+#include "src/draw.h"
+#include "src/global.h"
+
+void initSDL() {
+  SDL_Init(SDL_INIT_VIDEO);
+  window = SDL_CreateWindow(
+    "pixed",
+    SDL_WINDOWPOS_UNDEFINED,
+    SDL_WINDOWPOS_UNDEFINED,
+    SCREEN_WIDTH,
+    SCREEN_HEIGHT,
+    SDL_WINDOW_SHOWN
+  );
+  renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+  SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+  SDL_RenderClear(renderer);
+  SDL_RenderPresent(renderer);
+}
+
+int main(void) {
+  initSDL();
+
+  while (1) {
+    handleInput();
+    drawGrid();
+    SDL_Delay(16);
+  }
+
+  return 0;
+}

src/draw.c

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+#include <SDL2/SDL.h>
+
+#include "global.h"
+
+void doDrawGrid(int x, int y) {
+  SDL_Rect pixelRect = {
+    x * PIXEL_SIZE,
+    y * PIXEL_SIZE,
+    PIXEL_SIZE,
+    PIXEL_SIZE
+  };
+  SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+
+  if (grid[x][y] == 0) {
+    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+  } else if (grid[x][y] == 1) {
+    SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+  } else if (grid[x][y] == 2) {
+    SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
+  } else if (grid[x][y] == 3) {
+    SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
+  } else {
+    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+  }
+
+  SDL_RenderFillRect(renderer, &pixelRect);
+}
+
+void drawPicker() {
+  SDL_Rect pickerRect = {
+    FRAME_WIDTH,
+    0,
+    COLOR_PICKER_WIDTH,
+    SCREEN_HEIGHT
+  };
+
+  SDL_SetRenderDrawColor(renderer, 200, 200, 200, 255);
+  SDL_RenderFillRect(renderer, &pickerRect);
+
+  for (int i = 0; i < 4; i++) {
+    SDL_Rect colorRect = {
+      FRAME_WIDTH + PIXEL_SIZE,
+      i * (COLOR_PICKER_WIDTH / 4),
+      COLOR_PICKER_WIDTH - (PIXEL_SIZE * 2),
+      COLOR_PICKER_WIDTH / 4 - PIXEL_SIZE
+    };
+    if (i == 0) {
+      SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+    } else if (i == 1) {
+      SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+    } else if (i == 2) {
+      SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
+    } else if (i == 3) {
+      SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
+    } else {
+      SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+    }
+
+    SDL_RenderFillRect(renderer, &colorRect);
+  }
+}
+
+void drawGrid() {
+  SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+  SDL_RenderClear(renderer);
+
+  for (int x = 0; x < FRAME_WIDTH / PIXEL_SIZE; x++) {
+    for (int y = 0; y < FRAME_HEIGHT / PIXEL_SIZE; y++) {
+      doDrawGrid(x, y);
+    }
+  }
+
+  drawPicker();
+  SDL_RenderPresent(renderer);
+}

src/draw.h

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+#ifndef DRAW_H
+#define DRAW_H
+
+void drawGrid();
+
+#endif

src/export.c

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+#include <stdio.h>
+
+#include "global.h"
+
+void saveTGA() {
+  FILE *file = fopen("sprite.tga", "wb");
+  if (!file) {
+    puts("ファイルの作成に失敗。\n");
+    return;
+  }
+
+  fputc(0, file); // ID長さ
+  fputc(0, file); // 色マップ類
+  fputc(2, file);
+  for (int i = 0; i < 5; i++) fputc(0, file);
+  for (int i = 0; i < 4; i++) fputc(0, file);
+  fputc(FRAME_WIDTH & 0xFF, file);
+  fputc((FRAME_WIDTH >> 8) & 0xFF, file);
+  fputc(FRAME_HEIGHT & 0xFF, file);
+  fputc((FRAME_HEIGHT >> 8) & 0xFF, file);
+  fputc(24, file);
+
+  for (int y = FRAME_HEIGHT / PIXEL_SIZE - 1; y >= 0; y--) {
+    for (int x = 0; x < FRAME_WIDTH / PIXEL_SIZE; x++) {
+      int color = grid[x][y];
+      if (color == 0) {
+        fputc(0, file);
+        fputc(0, file);
+        fputc(0, file);
+      } else if (color == 1) {
+        fputc(255, file);
+        fputc(0, file);
+        fputc(0, file);
+      } else if (color == 2) {
+        fputc(0, file);
+        fputc(255, file);
+        fputc(0, file);
+      } else if (color == 3) {
+        fputc(0, file);
+        fputc(0, file);
+        fputc(255, file);
+      } else {
+        fputc(255, file);
+        fputc(255, file);
+        fputc(255, file);
+      }
+    }
+  }
+
+  fclose(file);
+  puts("ファイルを保存しました。");
+}

src/export.h

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+#ifndef EXPORT_H
+#define EXPORT_H
+
+void saveTGA();
+
+#endif

src/global.c

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+#include "global.h"
+
+SDL_Window *window = NULL;
+SDL_Renderer *renderer = NULL;
+int grid[FRAME_WIDTH / PIXEL_SIZE][FRAME_HEIGHT / PIXEL_SIZE];
+int currentColor = 0;

src/global.h

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+#ifndef GLOBAL_H
+#define GLOBAL_H
+
+#include <SDL2/SDL.h>
+
+#define SCREEN_WIDTH 800
+#define SCREEN_HEIGHT 600
+#define FRAME_WIDTH 600
+#define FRAME_HEIGHT 600
+#define COLOR_PICKER_WIDTH 200
+#define PIXEL_SIZE 10
+
+extern SDL_Window *window;
+extern SDL_Renderer *renderer;
+extern int grid[FRAME_WIDTH / PIXEL_SIZE][FRAME_HEIGHT / PIXEL_SIZE];
+extern int currentColor;
+
+#endif

src/input.c

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+#include <SDL2/SDL.h>
+
+#include "export.h"
+#include "global.h"
+
+void doHandleInput(SDL_Event event) {
+  if (event.type == SDL_QUIT) {
+    exit(0);
+  } else if (event.type == SDL_KEYDOWN) {
+    if (event.key.keysym.sym == SDLK_w && SDL_GetModState() & KMOD_CTRL) {
+      saveTGA();
+    }
+  } else if (event.type == SDL_MOUSEBUTTONDOWN) {
+    if (event.button.button == SDL_BUTTON_LEFT) {
+      int x = event.button.x;
+      int y = event.button.y;
+      if (x < FRAME_WIDTH && y < FRAME_HEIGHT) {
+        int gridX = x / PIXEL_SIZE;
+        int gridY = y / PIXEL_SIZE;
+        grid[gridX][gridY] = currentColor;
+      } else if (x >= FRAME_WIDTH && x < SCREEN_WIDTH && y < COLOR_PICKER_WIDTH) {
+        int colorIndex = (y / (COLOR_PICKER_WIDTH / 4)) % 4;
+        currentColor = colorIndex;
+      }
+    }
+  } else if (event.type == SDL_MOUSEMOTION) {
+    if (event.motion.state & SDL_BUTTON_LMASK) {
+      int x = event.motion.x;
+      int y = event.motion.y;
+      if (x > FRAME_WIDTH || y > FRAME_HEIGHT) return;
+      int gridX = x / PIXEL_SIZE;
+      int gridY = y / PIXEL_SIZE;
+      grid[gridX][gridY] = currentColor;
+    }
+  }
+}
+
+void handleInput() {
+  SDL_Event event;
+  while (SDL_PollEvent(&event)) {
+    doHandleInput(event);
+  }
+}

src/input.h

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+#ifndef INPUT_H
+#define INPUT_H
+
+void handleInput();
+
+#endif