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https://github.com/pevans/erc-c.git
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b646bfc511
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.
106 lines
2.0 KiB
C
106 lines
2.0 KiB
C
/*
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* vm_screen.c
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*
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* Functions here support drawing to the virtual machine's "screen";
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* exactly how that is done is an abstraction to the rest of the
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* program, which only knows to call the functions here.
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*/
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#include <stdlib.h>
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#include "log.h"
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#include "vm_screen.h"
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int
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vm_screen_init()
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{
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if (!glfwInit()) {
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return ERR_GFXINIT;
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}
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return OK;
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}
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void
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vm_screen_finish()
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{
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glfwTerminate();
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}
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/*
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* Return a new screen context. We also set the color to black.
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*/
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vm_screen_context *
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vm_screen_new_context()
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{
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vm_screen_context *context;
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context = (vm_screen_context *)malloc(sizeof(vm_screen_context));
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if (context == NULL) {
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log_critical("Failed to allocate vm_screen_context");
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exit(1);
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}
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vm_screen_set_color(context, 0, 0, 0, 0);
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return context;
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}
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int
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vm_screen_add_window(vm_screen_context *context)
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{
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context->window = glfwCreateWindow(320, 240, "erc", NULL, NULL);
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if (context->window == NULL) {
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log_critical("Could not create a window");
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return ERR_GFXINIT;
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}
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glfwMakeContextCurrent(context->window);
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return OK;
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}
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/*
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* Free the contents of a screen context.
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*/
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void
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vm_screen_free_context(vm_screen_context *context)
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{
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free(context);
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}
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bool
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vm_screen_active(vm_screen_context *context)
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{
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return !glfwWindowShouldClose(context->window);
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}
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/*
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* Set the color of a screen context to a given RGBA value.
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*/
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void
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vm_screen_set_color(vm_screen_context *context,
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int red,
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int green,
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int blue,
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int alpha)
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{
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context->color_red = red;
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context->color_green = green;
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context->color_blue = blue;
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context->color_alpha = alpha;
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}
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/*
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* Draw a rectangle on the screen at a given x/y position, with a given
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* set of x/y dimensions, with a given screen context.
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*/
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void
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vm_screen_draw_rect(vm_screen_context *context,
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int xpos,
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int ypos,
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int xsize,
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int ysize)
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{
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// FIXME: NOOP
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}
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