diff options
| -rw-r--r-- | .gitignore | 5 | ||||
| -rw-r--r-- | Makefile | 12 | ||||
| -rw-r--r-- | framebuffer.c | 59 | ||||
| -rw-r--r-- | framebuffer.h | 71 | ||||
| -rw-r--r-- | main.c | 5 |
5 files changed, 152 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9050050 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +# The executable +wafflestone + +# VIM swap files +.*.swp diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..c0492b8 --- /dev/null +++ b/Makefile @@ -0,0 +1,12 @@ +CC=clang +EXECUTABLE=wafflestone + +wafflestone: *.c *.h + $(CC) -Wall -Wpedantic -Wextra -Werror -O3 -o $(EXECUTABLE) framebuffer.c main.c + +debug: *.c *.h + $(CC) -Wall -g -o $(EXECUTABLE) framebuffer.c main.c + +.PHONY: clean +clean: + rm ./$(EXECUTABLE) diff --git a/framebuffer.c b/framebuffer.c new file mode 100644 index 0000000..b6e922e --- /dev/null +++ b/framebuffer.c @@ -0,0 +1,59 @@ +#include <stdlib.h> + +#include "framebuffer.h" + +Framebuffer fb_new(size_t width, size_t height) { + Framebuffer fb; + + /* In case malloc() fails and we return early */ + fb.width = 0; + fb.height = 0; + + fb.fb = malloc(sizeof(Pixel *) * height); + if (fb.fb == NULL) return fb; + + for (size_t i = 0; i < height; i++) { + fb.fb[i] = malloc(sizeof(Pixel) * width); + if (fb.fb[i] == NULL) { + /* FIXME: Memory leak; should free all prev. malloced rows */ + fb.fb = NULL; + return fb; + } + } + + fb.width = width; + fb.height = height; + return fb; +} + +void fb_free(Framebuffer *fb) { + if (fb->fb == NULL) goto ret; + + for (size_t i = 0; i < fb->height; i++) { + free(fb->fb[i]); + } + free(fb->fb); + +ret: + fb->width = 0; + fb->height = 0; + return; +} + +void fb_fill(Framebuffer fb, Pixel pixel) { + for (size_t row = 0; row < fb.height; row++) { + for (size_t col = 0; col < fb.width; col++) { + fb_put(fb, row, col, pixel); + } + } +} + +void inline fb_put(Framebuffer fb, size_t row, size_t col, Pixel pixel) { + fb.fb[row][col] = pixel; +} + +void fb_init(void); + +void fb_cleanup(void); + +void fb_print(Framebuffer fb); diff --git a/framebuffer.h b/framebuffer.h new file mode 100644 index 0000000..1b0254f --- /dev/null +++ b/framebuffer.h @@ -0,0 +1,71 @@ +#ifndef FRAMEBUFFER_H_ +#define FRAMEBUFFER_H_ + +#include <stdint.h> /* uint8_t */ +#include <stddef.h> /* wchar_t */ +#include <sys/types.h> /* ssize_t */ + +/* Globals for the terminal size, set by fb_init() */ +extern size_t TERM_WIDTH, TERM_HEIGHT; + +/* Represents a 24 bit colour, 8 bit per channel */ +typedef struct Colour_s { + uint8_t r, g, b; +} Colour; + +/* Basic colours */ +#define C_BLACK (Colour){0, 0, 0} +#define C_WHITE (Colour){255, 255, 255} +#define C_RED (Colour){255, 0, 0} +#define C_GREEN (Colour){0, 255, 0} +#define C_BLUE (Colour){0, 0, 255} +#define C_YELLOW (Colour){255, 255, 0} +#define C_CYAN (Colour){0, 255, 255} +#define C_MAGENTA (Colour){255, 0, 255} + +/* One 'pixel' of the image, AKA one character in the terminal. + * For a solid colour pixel, set ch to a space and change the bg colour */ +typedef struct Pixel_s { + Colour fg, bg; + wchar_t ch; /* the char of the pixel */ +} Pixel; + +/* Solid colour pixels */ +#define P_BLACK (Pixel){C_BLACK, C_BLACK, ' '} +#define P_WHITE (Pixel){C_WHITE, C_WHITE, ' '} +#define P_RED (Pixel){C_RED, C_RED, ' '} +#define P_GREEN (Pixel){C_GREEN, C_GREEN, ' '} +#define P_BLUE (Pixel){C_BLUE, C_BLUE, ' '} +#define P_YELLOW (Pixel){C_YELLOW, C_YELLOW, ' '} +#define P_CYAN (Pixel){C_CYAN, C_CYAN, ' '} +#define P_MAGENTA (Pixel){C_MAGENTA, C_MAGENTA, ' '} + +typedef struct Framebuffer_s { + Pixel **fb; /* Adressed as fb[row][col] or fb[x][y] */ + size_t width, height; +} Framebuffer; + +/* Check if fb == NULL in case malloc() fails */ +Framebuffer fb_new(size_t width, size_t height); + +void fb_free(Framebuffer *fb); + +/* Fills fb with pixel */ +void fb_fill(Framebuffer fb, Pixel pixel); + +/* Fills fb with black */ +#define fb_clear(fb) fb_fill(fb, P_BLACK) + +/* Puts a pixel onto fb in a specified position */ +void inline fb_put(Framebuffer fb, size_t row, size_t col, Pixel pixel); + +/* Initializes the terminal and sets TERM_WIDTH and TERM_HEIGHT */ +void fb_init(void); + +/* Undoes everything fb_init() did */ +void fb_cleanup(void); + +/* Prints fb to the screen */ +void fb_print(Framebuffer fb); + +#endif /* FRAMEBUFFER_H_ */ @@ -0,0 +1,5 @@ +#include <stdio.h> + +int main(void) { + fprintf(stderr, "Not yet implemented\n"); +} |