raster

commit 77307eead3c04283b404b463155cfce2f7e6bb06
parent df591f57ff459fcfbe08ea4cbc7335fa448b7a73
Author: Robert Russell <robert@rr3.xyz>
Date:   Mon, 26 Aug 2024 20:58:13 -0700

Add gitignore

Diffstat:
A
.gitignore
 | 
2
++
M
main.c
 | 
47
++++++++++++++++++++++++++++++++---------------

2 files changed, 34 insertions(+), 15 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+main
+\ No newline at end of file
diff --git a/main.c b/main.c
@@ -18,6 +18,7 @@ struct cycle2 {
 	Vec2 *verts;
 };
 
+// TODO: More format options (not only f32 RGBA)
 struct image2 {
 	usize w, h;
 	Vec4 *pixels; // Row major order, starting in upper left
@@ -135,6 +136,7 @@ image2_bbox(Quad2 *r, Image2 image) {
 	}));
 }
 
+// TODO: Support filling collections of cycles (like Postscript), not only one
 int
 fill(Image2 image, Quad2 src_view, Cycle2 cycle, Vec4 color) {
 	if (cycle.len < 3) return -1;
@@ -348,13 +350,13 @@ fill(Image2 image, Quad2 src_view, Cycle2 cycle, Vec4 color) {
 }
 
 void
-image2_write_farbfeld(FILE *f, Image2 image) {
+write_farbfeld(FILE *f, Image2 image) {
 	char header[16];
 	memcpy(header, "farbfeld", 8);
 	r_writeb32(header + 8, image.w);
 	r_writeb32(header + 12, image.h);
 	if (!fwrite(header, sizeof header, 1, f))
-		r_fatalf("image2_write_farbfeld: failed to write header");
+		r_fatalf("write_farbfeld: failed to write header");
 
 	for (usize i = 0; i < image.h; i++) {
 		for (usize j = 0; j < image.w; j++) {
@@ -369,24 +371,22 @@ image2_write_farbfeld(FILE *f, Image2 image) {
 			buf[3] = r_htob16((*p)[3] * (f32)U16_MAX);
 
 			if (!fwrite(buf, sizeof buf, 1, f))
-				r_fatalf("image2_write_farbfeld: failed to write pixel data");
+				r_fatalf("write_farbfeld: failed to write pixel data");
 		}
 	}
 }
 
 int
 main(void) {
-	Vec4 black = { 0.0f, 0.0f, 0.0f, 1.0f };
-	Vec4 white = { 1.0f, 1.0f, 1.0f, 1.0f };
+	//Cycle2 cycle = {
+	//	.len = 3,
+	//	.verts = (Vec2[]){
+	//		{ 0.0f, 0.0f },
+	//		{ 1.0f, 0.0f },
+	//		{ 0.5f, 1.0f },
+	//	},
+	//};
 
-	Cycle2 cycle = {
-		.len = 3,
-		.verts = (Vec2[]){
-			{ 0.0f, 0.0f },
-			{ 1.0f, 0.0f },
-			{ 0.5f, 1.0f },
-		},
-	};
 	//Cycle2 cycle = {
 	//	.len = 4,
 	//	.verts = (Vec2[]){
@@ -396,6 +396,19 @@ main(void) {
 	//		{ 0.2f, 0.8f },
 	//	},
 	//};
+
+	Cycle2 cycle = {
+		.len = 6,
+		.verts = (Vec2[]){
+			{ 0.1f, 0.1f },
+			{ 0.5f, 0.3f },
+			{ 0.9f, 0.1f },
+			{ 0.8f, 0.9f },
+			{ 0.5f, 0.5f },
+			{ 0.2f, 0.9f },
+		},
+	};
+
 	Quad2 cycle_view = {
 		{ 0.0f, 0.0f },
 		{ 1.0f, 1.0f },
@@ -406,13 +419,17 @@ main(void) {
 		.h = 1000,
 		.pixels = r_ealloc(1000 * 1000 * sizeof(Vec4)),
 	};
+
+	Vec4 white = { 1.0f, 1.0f, 1.0f, 1.0f };
 	for (usize i = 0; i < image.h; i++) {
 		for (usize j = 0; j < image.w; j++)
 			SET(image.pixels[i * image.h + j], white);
 	}
 
-	if (fill(image, cycle_view, cycle, black) < 0)
+	f32 a = 1.0f;
+	Vec4 color = { 0.1f * a, 0.6f * a, 0.3f * a, a };
+	if (fill(image, cycle_view, cycle, color) < 0)
 		r_fatalf("fill error");
 
-	image2_write_farbfeld(stdout, image);
+	write_farbfeld(stdout, image);
 }