erc-c/include/vm_screen.h

#ifndef _VM_SCREEN_H_
#define _VM_SCREEN_H_

#include <stdbool.h>
#include <SDL.h>

#include "vm_area.h"

typedef struct {
    /*
     * This is the window in SDL that we're displaying. It's fine for a
     * screen to be headless; that is, not to have a window. Screen
     * functions which deal with SDL will simply not run that code if
     * headless.
     */
    SDL_Window *window;

    /*
     * In SDL, the renderer is comparable to the old SDL_Surface type
     * (which is still there!). A renderer is a little more stateful; it
     * contains its own color information to be used when rendering
     * shapes, for example.
     */
    SDL_Renderer *render;

    /*
     * These are the x and y coordinates of the window we're creating.
     * FIXME: this should probably be renamed to width and height...
     */
    int xcoords;
    int ycoords;
} vm_screen;

extern bool vm_screen_active(vm_screen *);
extern int vm_screen_add_window(vm_screen *, int, int);
extern int vm_screen_init();
extern int vm_screen_xcoords(vm_screen *);
extern int vm_screen_ycoords(vm_screen *);
extern vm_screen *vm_screen_create();
extern void vm_screen_draw_rect(vm_screen *, vm_area *);
extern void vm_screen_finish();
extern void vm_screen_free(vm_screen *);
extern void vm_screen_refresh(vm_screen *);
extern void vm_screen_set_color(vm_screen *, uint8_t, uint8_t, uint8_t, uint8_t);
extern void vm_screen_set_logical_coords(vm_screen *, int, int);

#endif
First commit 2017-11-22 05:24:51 +00:00			`#ifndef _VM_SCREEN_H_`
			`#define _VM_SCREEN_H_`

First stab at adding graphics. This involves using glfw. This first commit creates a window but doesn't do anything with it; it also just hangs until you can escape out somehow. 2017-12-17 04:45:39 +00:00			`#include <stdbool.h>`
Really basic implementation of SDL2. Plus a crappy rectangle to prove that our vm screen code is working in principle. (It will be removed shortly.) 2017-12-18 05:31:56 +00:00			`#include <SDL.h>`
First stab at adding graphics. This involves using glfw. This first commit creates a window but doesn't do anything with it; it also just hangs until you can escape out somehow. 2017-12-17 04:45:39 +00:00
Move vm_area logic into its own file 2018-01-08 02:05:02 +00:00			`#include "vm_area.h"`
Switch references from SDL_Rect to vm_area 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. 2017-12-27 22:31:02 +00:00
First commit 2017-11-22 05:24:51 +00:00			`typedef struct {`
More documentation; remove DEFWIDTH/DEFHEIGHT 2017-12-27 23:14:54 +00:00			`/*`
			`* This is the window in SDL that we're displaying. It's fine for a`
			`* screen to be headless; that is, not to have a window. Screen`
			`* functions which deal with SDL will simply not run that code if`
			`* headless.`
			`*/`
Really basic implementation of SDL2. Plus a crappy rectangle to prove that our vm screen code is working in principle. (It will be removed shortly.) 2017-12-18 05:31:56 +00:00			`SDL_Window *window;`
More documentation; remove DEFWIDTH/DEFHEIGHT 2017-12-27 23:14:54 +00:00
			`/*`
			`* In SDL, the renderer is comparable to the old SDL_Surface type`
			`* (which is still there!). A renderer is a little more stateful; it`
			`* contains its own color information to be used when rendering`
			`* shapes, for example.`
			`*/`
Really basic implementation of SDL2. Plus a crappy rectangle to prove that our vm screen code is working in principle. (It will be removed shortly.) 2017-12-18 05:31:56 +00:00			`SDL_Renderer *render;`

More documentation; remove DEFWIDTH/DEFHEIGHT 2017-12-27 23:14:54 +00:00			`/*`
			`* These are the x and y coordinates of the window we're creating.`
			`* FIXME: this should probably be renamed to width and height...`
			`*/`
Really basic implementation of SDL2. Plus a crappy rectangle to prove that our vm screen code is working in principle. (It will be removed shortly.) 2017-12-18 05:31:56 +00:00			`int xcoords;`
			`int ycoords;`
Rename vm_screen_context to vm_screen 2017-12-17 22:42:05 +00:00			`} vm_screen;`
First commit 2017-11-22 05:24:51 +00:00
Reorganize header files 2017-12-26 22:47:34 +00:00			`extern bool vm_screen_active(vm_screen *);`
Add ability to set logical size of window at any time We also removed the scale field, as the screen does not expect to manage its own logical coordinates in SDL. Additionally, we added an xcoords and ycoords function to the screen externs so that you don't have to "know" that screen has those as fields. 2017-12-20 22:44:24 +00:00			`extern int vm_screen_add_window(vm_screen *, int, int);`
Reorganize header files 2017-12-26 22:47:34 +00:00			`extern int vm_screen_init();`
Add ability to set logical size of window at any time We also removed the scale field, as the screen does not expect to manage its own logical coordinates in SDL. Additionally, we added an xcoords and ycoords function to the screen externs so that you don't have to "know" that screen has those as fields. 2017-12-20 22:44:24 +00:00			`extern int vm_screen_xcoords(vm_screen *);`
			`extern int vm_screen_ycoords(vm_screen *);`
Reorganize header files 2017-12-26 22:47:34 +00:00			`extern vm_screen *vm_screen_create();`
Use vm_area for draw_rect. This simplifies and to some degree normalizes the way we reference areas in the vm subsystem. 2017-12-27 22:42:30 +00:00			`extern void vm_screen_draw_rect(vm_screen , vm_area );`
Reorganize header files 2017-12-26 22:47:34 +00:00			`extern void vm_screen_finish();`
Rename vm_screen_context to vm_screen 2017-12-17 22:42:05 +00:00			`extern void vm_screen_free(vm_screen *);`
Reorganize header files 2017-12-26 22:47:34 +00:00			`extern void vm_screen_refresh(vm_screen *);`
Really basic implementation of SDL2. Plus a crappy rectangle to prove that our vm screen code is working in principle. (It will be removed shortly.) 2017-12-18 05:31:56 +00:00			`extern void vm_screen_set_color(vm_screen *, uint8_t, uint8_t, uint8_t, uint8_t);`
Reorganize header files 2017-12-26 22:47:34 +00:00			`extern void vm_screen_set_logical_coords(vm_screen *, int, int);`
First commit 2017-11-22 05:24:51 +00:00
			`#endif`