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More documentation; remove DEFWIDTH/DEFHEIGHT

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Peter Evans 2017-12-27 17:14:54 -06:00
parent 6a230341e1
commit 1942a75d9e
1 changed files with 26 additions and 3 deletions
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29
include/vm_screen.h
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@ -4,9 +4,6 @@
#include <stdbool.h>
#include <SDL.h>
#define VM_SCREEN_DEFWIDTH 800
#define VM_SCREEN_DEFHEIGHT 600
typedef struct {
/*
* These are the x and y coordinate offsets in the logical dimension
@ -28,19 +25,45 @@ typedef struct {
} vm_area;
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;
/*
* Set the contents of an SDL_Rect to the equivalent fields contained in
* a vm_area.
*/
#define SET_SDL_RECT(name, a) \
(name).x = (a).xoff; \
(name).y = (a).yoff; \
(name).w = (a).width; \
(name).h = (a).height
/*
* Much like SET_SDL_RECT(), except this will (as a side-effect!)
* declare an SDL_Rect variable (`name`) and pass that into the SET
* macro.
*/
#define MAKE_SDL_RECT(name, a) \
SDL_Rect name; \
SET_SDL_RECT(name, a)