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new mono texture format for gl

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minjaesong
2021-05-04 01:32:47 +09:00
parent 57b59995e0
commit 7709eb4d95
2 changed files with 54 additions and 26 deletions
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assets/disk0/home/calc.js Normal file
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80
assets/disk0/tvdos/gl.js
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@@ -16,6 +16,15 @@ GL.Texture = function(w, h, bytes) {
throw "Texture data is not an instance of array"; 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) { GL.SpriteSheet = function(tilew, tileh, tex) {
this.tileWidth = tilew; this.tileWidth = tilew;
this.tileHeight = tileh; this.tileHeight = tileh;
@@ -37,46 +46,65 @@ GL.SpriteSheet = function(tilew, tileh, tex) {
return ty; return ty;
}; };
}; };
GL.drawTexPattern = function(texture, x, y, width, height) { GL.drawTexPattern = function(texture, x, y, width, height, fgcol, bgcol) {
for (var yy = 0; yy < height; yy++) { if (!(texture instanceof GL.Texture) && !(texture instanceof GL.MonoTex)) throw Error("Texture is not a GL Texture types");
for (var xx = 0; xx < width; xx++) {
var tx = xx % texture.width; for (let yy = 0; yy < height; yy++) {
var ty = yy % texture.height; for (let xx = 0; xx < width;) {
var c = texture.texData[ty * texture.width + tx]; let tx = xx % texture.width;
graphics.plotPixel(x + xx, y + yy, c); 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) { GL.drawTexPatternOver = function(texture, x, y, width, height, fgcol) {
for (var yy = 0; yy < height; yy++) { if (!(texture instanceof GL.Texture) && !(texture instanceof GL.MonoTex)) throw Error("Texture is not a GL Texture types");
for (var xx = 0; xx < width; xx++) {
var tx = xx % texture.width; for (let yy = 0; yy < height; yy++) {
var ty = yy % texture.height; for (let xx = 0; xx < width;) {
var c = texture.texData[ty * texture.width + tx]; let tx = xx % texture.width;
if ((c & 255) != 255) { let ty = yy % texture.height;
graphics.plotPixel(x + xx, y + yy, c); 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 * Draws a texture verbatim - color of 255 will be written to the screen buffer
*/ */
GL.drawTexImage = function(texture, x, y) { GL.drawTexImage = function(texture, x, y, fgcol, bgcol) {
GL.drawTexPattern(texture, x, y, texture.width, texture.height); 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 * Draws texture with blitting - color of 255 will pass-thru what's already on the screen buffer
*/ */
GL.drawTexImageOver = function(texture, x, y) { GL.drawTexImageOver = function(texture, x, y, fgcol) {
for (var ty = 0; ty < texture.height; ty++) { GL.drawTexPatternOver(texture, x, y, texture.width, texture.height, fgcol);
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.drawSprite = function(sheet, xi, yi, x, y) { GL.drawSprite = function(sheet, xi, yi, x, y) {
var offx = sheet.getOffX(xi); var offx = sheet.getOffX(xi);