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c7b830bb4a
We still use SDL_Rect internally, but we want to abstract the use of it in our API. The only thing the rest of the app should care about is the vm_area struct.
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef _VM_SCREEN_H_
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#define _VM_SCREEN_H_
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#include <stdbool.h>
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#include <SDL.h>
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#define VM_SCREEN_DEFWIDTH 800
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#define VM_SCREEN_DEFHEIGHT 600
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/*
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* If you just want to plot a single pixel, you can use this macro to
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* abstract away the need to indicate the x/y dimensions (as those must
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* necessarily be 1x1).
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*/
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#define vm_screen_draw_pixel(screen, xpos, ypos) \
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vm_screen_draw_rect(screen, xpos, ypos, 1, 1)
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typedef struct {
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int xoff;
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int yoff;
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int width;
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int height;
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} vm_area;
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typedef struct {
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SDL_Window *window;
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SDL_Renderer *render;
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vm_area area;
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int xcoords;
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int ycoords;
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} vm_screen;
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#define SET_SDL_RECT(name, a) \
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(name).x = (a).xoff; \
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(name).y = (a).yoff; \
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(name).w = (a).width; \
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(name).h = (a).height
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#define MAKE_SDL_RECT(name, a) \
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SDL_Rect name; \
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SET_SDL_RECT(name, a)
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#define vm_area_set(a, x, y, w, h) \
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(a)->xoff = x; \
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(a)->yoff = y; \
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(a)->width = w; \
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(a)->height = h
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extern bool vm_screen_active(vm_screen *);
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extern int vm_screen_add_window(vm_screen *, int, int);
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extern int vm_screen_init();
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extern int vm_screen_xcoords(vm_screen *);
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extern int vm_screen_ycoords(vm_screen *);
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extern vm_screen *vm_screen_create();
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extern void vm_screen_draw_rect(vm_screen *, int, int, int, int);
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extern void vm_screen_finish();
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extern void vm_screen_free(vm_screen *);
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extern void vm_screen_refresh(vm_screen *);
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extern void vm_screen_set_color(vm_screen *, uint8_t, uint8_t, uint8_t, uint8_t);
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extern void vm_screen_set_logical_coords(vm_screen *, int, int);
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#endif
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