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Hello world, in rendered text; use nearest pixel sampling

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The scale change removes some blurriness that we saw when copying pixels
from the bitmap font into the renderer.
This commit is contained in:
Peter Evans 2017-12-22 12:56:22 -06:00
parent 979ca65f43
commit b2c1bd9e6d
3 changed files with 20 additions and 2 deletions
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11
src/apple2.c
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@ -86,10 +86,21 @@ apple2_set_color(apple2 *mach, int mode)
// correct color interpretation
}
#define SHOW(ch) \
vm_bitfont_render(mach->sysfont, mach->screen, &area, ch); \
area.x += 7
void
apple2_run_loop(apple2 *mach)
{
SDL_Rect area;
while (vm_screen_active(mach->screen)) {
area.x = 50;
area.y = 50;
SHOW('H'); SHOW('e'); SHOW('l'); SHOW('l'); SHOW('o'); SHOW(' ');
SHOW('w'); SHOW('o'); SHOW('r'); SHOW('l'); SHOW('d'); SHOW('!');
vm_screen_refresh(mach->screen);
}
}

9
src/vm_bitfont.c
View File

@ -98,10 +98,17 @@ vm_bitfont_render(vm_bitfont *font,
src.w = font->width;
src.h = font->height;
// The source and destination width/height must match. This might be
// a faulty assumption down the road; for now, it holds.
dest->w = src.w;
dest->h = src.h;
// Get the spot in the bitmap where the glyph is found
vm_bitfont_offset(font, ch, &src.x, &src.y);
if (SDL_RenderCopy(screen->render, font->texture, dest, &src) < 0) {
log_critical("src.x = %d, src.y = %d", src.x, src.y);
if (SDL_RenderCopy(screen->render, font->texture, &src, dest) < 0) {
log_critical("Failed to render glyph: %s", SDL_GetError());
return ERR_GFXOP;
}

2
src/vm_screen.c
View File

@ -84,7 +84,7 @@ vm_screen_add_window(vm_screen *screen, int width, int height)
// We plan to draw onto a surface that is xcoords x ycoords in area,
// regardless of the actual size of the window.
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest");
// We default to a logical coordinate system of exactly the given
// width and height. For emulated systems like the Apple II, this