initial commit.

1 files changed, 207 insertions, 0 deletions

diff --git a/render.c b/render.c
new file mode 100644
index 0000000..74da997
--- /dev/null
+++ b/render.c
@@ -0,0 +1,207 @@
+#include "render.h"
+
+static int font_w = 960;
+static unsigned font_data[] = {
+	0x00000000, 0x00003000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x0cc0c000, 0x8000301b, 0x60601803, 0x00000000, 0x20000000,
+	0x0780c078, 0x83f0e01e, 0xe0783f07, 0x60000001, 0x1e018000,
+	0x07e0c078, 0xe3f87e1f, 0xe0cc1e0f, 0x1e638f01, 0x1f0c6318,
+	0x07e1f07e, 0xc330fc1e, 0x30cc318c, 0x021e0fc3, 0x000101e0,
+	0x00e00000, 0x0000e000, 0xc00e0007, 0x3c038c00, 0x00000000,
+	0x00000000, 0x00001000, 0x00000000, 0x30380000, 0x0000c070,
+	0x0cc1e000, 0xc630f81b, 0xc0301806, 0x00000cc0, 0x30000000,
+	0x0cc0f0cc, 0xc030f033, 0x30cc330c, 0x30000003, 0x33030000,
+	0x8cc1e0cc, 0xc230cc33, 0xc0cc3308, 0x0c630600, 0x318ce3b8,
+	0x0cc318cc, 0xc330b433, 0x30cc318c, 0x06060cc3, 0x00038180,
+	0x00c00018, 0x8000c000, 0x000c000d, 0x30030000, 0x00000000,
+	0x00000000, 0x00001800, 0x00000000, 0x300c0000, 0x0409e0c0,
+	0x8481e000, 0xc3300c3f, 0x80180c06, 0x000c0781, 0x18000000,
+	0x0c00c0ec, 0xc1f0d830, 0x30cc1800, 0x180c0303, 0x30060000,
+	0x8cc330ec, 0xc0318c01, 0xc0cc3180, 0x0c330600, 0x318de3f8,
+	0x0cc318cc, 0xc3303003, 0x3078318c, 0x0c060643, 0x0006c180,
+	0x07c0f018, 0x81e0f81e, 0xf06c3701, 0x30330f00, 0x1e07c1f8,
+	0x0ee37076, 0xc330fc3e, 0x30c6318c, 0x300c0fc3, 0x0e0f20c0,
+	0x0001e000, 0x8180781b, 0x80180013, 0x000c1fe1, 0x0c000000,
+	0x0600c0dc, 0xc300cc1c, 0xe0780c07, 0x0c0c0303, 0x180c03f0,
+	0x87c330ec, 0xc1f18c01, 0xc0fc0187, 0x0c1f0600, 0x318fe358,
+	0x07c3187c, 0xc330300e, 0xe030358c, 0x18060301, 0x000c6180,
+	0x0cc18030, 0xc330cc33, 0xc0dc1987, 0x301b0c00, 0x330cc358,
+	0x0dc198cc, 0xc3301803, 0x306c358c, 0x00060643, 0x1b060180,
+	0x0000c000, 0xc0c0c01b, 0x8018001e, 0x003f0781, 0x060003f0,
+	0x0300c0cc, 0xc301fc30, 0x00cc0c0c, 0x0c000003, 0x0c0c0000,
+	0x8cc3f00c, 0xc0318c01, 0xc0cc3980, 0x0c330660, 0x318f6318,
+	0x06c3980c, 0xc3303018, 0xc078358c, 0x30060180, 0x00000180,
+	0x0cc1f000, 0x83f0cc03, 0xc0cc1981, 0x301f0c00, 0x330cc358,
+	0x00c198cc, 0xc330181e, 0x3038358c, 0x300c0303, 0x318000c0,
+	0x80000000, 0xc6607c3f, 0xc030000c, 0x300c0cc0, 0x03030000,
+	0x0180c0cc, 0xc330c033, 0x30cc0c0c, 0x180c0303, 0x000603f0,
+	0x8cc3308c, 0xc230cc33, 0xc0cc3300, 0x8c630660, 0x318e6318,
+	0x0cc1f00c, 0x83303033, 0xc0cc1f07, 0x600609c0, 0x00000180,
+	0x0cc19800, 0x8030cc33, 0xc0cc1f01, 0x30330cc0, 0x330cc358,
+	0x00c198cc, 0x8330d830, 0xe06c1f07, 0x300c0981, 0x318000c0,
+	0x0000c000, 0x8630301b, 0x6060001b, 0x300c0000, 0x01830000,
+	0x0fc3f078, 0x81e0c01e, 0xe0780c07, 0x300c0301, 0x0c030000,
+	0x07e33078, 0xe3f87e1f, 0xe0cc3e01, 0xfe6383c1, 0x1f0c6318,
+	0x0ce3c01e, 0x01e0781e, 0xe0cc1b03, 0xc01e0fc1, 0x000001e0,
+	0x07e3f000, 0xc1e0f81e, 0xf0ce1803, 0xfc338783, 0x1e0cc318,
+	0x01e1f07c, 0x06e0701f, 0x80c61b03, 0x30380fc1, 0x3f800070,
+	0x0000c000, 0x0000301b, 0x00000000, 0x18000000, 0x00800000,
+	0x00000000, 0x00000000, 0x00000000, 0x60060000, 0x00018000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x80000000, 0x7f800000,
+	0x00000000, 0x00000000, 0x00000f00, 0x00000000, 0x00000000,
+	0x0001800c, 0x00000000, 0xf0000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x0003c01e, 0x00000000, 0x00000000, 0x00000000, 0x00000000
+};
+
+Colour make_colour(unsigned rgb, unsigned char a) {
+	Colour r;
+	r.r = (unsigned char)(rgb >> 16);
+	r.g = (unsigned char)(rgb >> 8);
+	r.b = (unsigned char)rgb;
+	r.a = a;
+	return r;
+}
+
+Colour make_red(void) {
+	return make_colour(0xff0000, 0xff);
+}
+
+Colour make_green(void) {
+	return make_colour(0x00ff00, 0xff);
+}
+
+Colour make_blue(void) {
+	return make_colour(0x0000ff, 0xff);
+}
+
+Colour make_cyan(void) {
+	return make_colour(0x00ffff, 0xff);
+}
+
+Colour make_pink(void) {
+	return make_colour(0xff00ff, 0xff);
+}
+
+Colour make_yellow(void) {
+	return make_colour(0xffff00, 0xff);
+}
+
+Colour make_aliceblue(void) {
+	return make_colour(0xf0f8ff, 0xff);
+}
+
+Colour blend(Colour dst, Colour src) {
+	int ima;
+	ima = 0xff - src.a;
+	dst.r = (unsigned char)(((src.r * src.a) + (dst.r * ima)) >> 8);
+	dst.g = (unsigned char)(((src.g * src.a) + (dst.g * ima)) >> 8);
+	dst.b = (unsigned char)(((src.b * src.a) + (dst.b * ima)) >> 8);
+	return dst;
+}
+
+Colour blend_mod(Colour dst, Colour src, Colour mod) {
+	int ima;
+	src.a = (src.a * mod.a) >> 8;
+	ima = 0xff - src.a;
+	dst.r = (unsigned char)(((src.r * mod.r * src.a) >> 16) + ((dst.r * ima) >> 8));
+	dst.g = (unsigned char)(((src.g * mod.g * src.a) >> 16) + ((dst.g * ima) >> 8));
+	dst.b = (unsigned char)(((src.b * mod.b * src.a) >> 16) + ((dst.b * ima) >> 8));
+	return dst;
+}
+
+
+void ren_begin(Renderer* r, Colour* t, int w, int h) {
+	r->t = t;
+	r->w = w;
+	r->h = h;
+	r->clip.x = 0;
+	r->clip.y = 0;
+	r->clip.w = w;
+	r->clip.h = h;
+}
+
+void ren_end(Renderer* r) {
+	(void)r;
+}
+
+void ren_clear(Renderer* r) {
+	Colour* d = r->t, b = { 0 };
+	int i = 0, e = r->w * r->h;
+	for (i = 0; i < e; i++, d++)
+		*d = b;
+}
+
+void ren_clearc(Renderer* r, Colour c) {
+	Colour* d = r->t;
+	int i = 0, e = r->w * r->h;
+	for (i = 0; i < e; i++, d++)
+		*d = c;
+}
+
+void ren_clip(Renderer* r, const Rect* c) {
+	r->clip = *c;
+}
+
+void ren_point(Renderer* r, Colour c, int x, int y) {
+	if (x < 0) return;
+	if (y < 0) return;
+	if (x >= r->w) return;
+	if (y >= r->h) return;
+	r->t[x + y * r->w] = c;
+}
+
+void ren_char(
+	Renderer* r,
+	Colour c,
+	int x,
+	int y,
+	char ch
+) {
+	int i, j, k, l, ex, ey, s;
+	Colour* dst;
+	Rect re = { 0, 0, 10, 10 };
+	Rect sub = { 0, 0, 10, 10 };
+	re.x = x;
+	re.y = y;
+	sub.x = (ch - ' ') * 10;
+	rect_clips(&re, &sub, &r->clip);
+	ex = re.x + re.w;
+	ey = re.y + re.h;
+	dst = r->t + (re.x + re.y * r->w);
+	s = r->w - re.w;
+	for (j = re.y, l = sub.y; j < ey; j++, l++) {
+		for (i = re.x, k = sub.x; i < ex; i++, k++) {
+			int si = k + l * font_w;
+			unsigned bits = font_data[si / 32];
+			int bit = bits & (1 << si % 32);
+			if (bit)
+				*dst = blend(*dst, c);
+			dst++;
+		}
+		dst += s;
+	}
+}
+
+void ren_text(
+	Renderer* r,
+	Colour c,
+	int x,
+	int y,
+	const char* t
+) {
+	const char* s;
+	for (s = t; *s; s++, x += 10)
+		ren_char(r, c, x, y, *s);
+}
+