From 7709eb4d95e0a0e9e00192d6e6e8bd345b9afcad Mon Sep 17 00:00:00 2001
From: minjaesong <alswo9628@gmail.com>
Date: Tue, 4 May 2021 01:32:47 +0900
Subject: [PATCH] new mono texture format for gl

---
 assets/disk0/home/calc.js |  0
 assets/disk0/tvdos/gl.js  | 80 ++++++++++++++++++++++++++-------------
 2 files changed, 54 insertions(+), 26 deletions(-)
 create mode 100644 assets/disk0/home/calc.js

diff --git a/assets/disk0/home/calc.js b/assets/disk0/home/calc.js
new file mode 100644
index 0000000..e69de29
diff --git a/assets/disk0/tvdos/gl.js b/assets/disk0/tvdos/gl.js
index 9b7e280..b6f3093 100644
--- a/assets/disk0/tvdos/gl.js
+++ b/assets/disk0/tvdos/gl.js
@@ -16,6 +16,15 @@ GL.Texture = function(w, h, bytes) {
         throw "Texture data is not an instance of array";
     }
 };
+GL.MonoTex = function(w, h, bits) {
+    this.width = w;
+    this.height = h;
+    this.texData = bits;
+
+    if (!Array.isArray(bits) && !bits.toString().startsWith("[B")) {
+        throw "Texture data is not an instance of array";
+    }
+};
 GL.SpriteSheet = function(tilew, tileh, tex) {
     this.tileWidth = tilew;
     this.tileHeight = tileh;
@@ -37,46 +46,65 @@ GL.SpriteSheet = function(tilew, tileh, tex) {
         return ty;
     };
 };
-GL.drawTexPattern = function(texture, x, y, width, height) {
-    for (var yy = 0; yy < height; yy++) {
-        for (var xx = 0; xx < width; xx++) {
-            var tx = xx % texture.width;
-            var ty = yy % texture.height;
-            var c = texture.texData[ty * texture.width + tx];
-            graphics.plotPixel(x + xx, y + yy, c);
+GL.drawTexPattern = function(texture, x, y, width, height, fgcol, bgcol) {
+    if (!(texture instanceof GL.Texture) && !(texture instanceof GL.MonoTex)) throw Error("Texture is not a GL Texture types");
+
+    for (let yy = 0; yy < height; yy++) {
+        for (let xx = 0; xx < width;) {
+            let tx = xx % texture.width;
+            let ty = yy % texture.height;
+            if (texture instanceof GL.Texture) {
+                let c = texture.texData[ty * texture.width + tx];
+                graphics.plotPixel(x + xx, y + yy, c);
+            }
+            else if (texture instanceof GL.MonoTex) {
+                let octet = texture.texData[ty * (texture.width >> 3) + (tx >> 3)];
+                for (let i = 0; i < 8; i++) {
+                    let bit = ((octet >>> (7 - i)) & 1 != 0)
+                    graphics.plotPixel(x + xx + i, y + yy, bit ? bgcol : fgcol);
+                }
+            }
+
+            xx += (texture instanceof GL.MonoTex) ? 8 : 1;
         }
     }
 };
-GL.drawTexPatternOver = function(texture, x, y, width, height) {
-    for (var yy = 0; yy < height; yy++) {
-        for (var xx = 0; xx < width; xx++) {
-            var tx = xx % texture.width;
-            var ty = yy % texture.height;
-            var c = texture.texData[ty * texture.width + tx];
-            if ((c & 255) != 255) {
-                graphics.plotPixel(x + xx, y + yy, c);
+GL.drawTexPatternOver = function(texture, x, y, width, height, fgcol) {
+    if (!(texture instanceof GL.Texture) && !(texture instanceof GL.MonoTex)) throw Error("Texture is not a GL Texture types");
+
+    for (let yy = 0; yy < height; yy++) {
+        for (let xx = 0; xx < width;) {
+            let tx = xx % texture.width;
+            let ty = yy % texture.height;
+            if (texture instanceof GL.Texture) {
+                if ((c & 255) != 255) {
+                    let c = texture.texData[ty * texture.width + tx];
+                    graphics.plotPixel(x + xx, y + yy, c);
+                }
             }
+            else if (texture instanceof GL.MonoTex) {
+                let octet = texture.texData[ty * (texture.width >> 3) + (tx >> 3)];
+                for (let i = 0; i < 8; i++) {
+                    let bit = ((octet >>> (7 - i)) & 1 != 0)
+                    if (bit) graphics.plotPixel(x + xx + i, y + yy, fgcol);
+                }
+            }
+
+            xx += (texture instanceof GL.MonoTex) ? 8 : 1;
         }
     }
 };
 /*
  * Draws a texture verbatim - color of 255 will be written to the screen buffer
  */
-GL.drawTexImage = function(texture, x, y) {
-    GL.drawTexPattern(texture, x, y, texture.width, texture.height);
+GL.drawTexImage = function(texture, x, y, fgcol, bgcol) {
+    GL.drawTexPattern(texture, x, y, texture.width, texture.height, fgcol, bgcol);
 };
 /*
  * Draws texture with blitting - color of 255 will pass-thru what's already on the screen buffer
  */
-GL.drawTexImageOver = function(texture, x, y) {
-    for (var ty = 0; ty < texture.height; ty++) {
-        for (var tx = 0; tx < texture.width; tx++) {
-            var c = texture.texData[ty * texture.width + tx];
-            if ((c & 255) != 255) {
-                graphics.plotPixel(x + tx, y + ty, c);
-            }
-        }
-    }
+GL.drawTexImageOver = function(texture, x, y, fgcol) {
+    GL.drawTexPatternOver(texture, x, y, texture.width, texture.height, fgcol);
 };
 GL.drawSprite = function(sheet, xi, yi, x, y) {
     var offx = sheet.getOffX(xi);