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tms9918a: use 32-bit palette

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This commit is contained in:
Steven Hugg 2018-11-30 14:10:14 -05:00
parent c0f97458aa
commit 62bf05c1f4
2 changed files with 29 additions and 29 deletions
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4
src/util.ts
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@ -381,6 +381,10 @@ export function rgb2bgr(x) {
return ((x&0xff)<<16) | ((x>>16)&0xff) | (x&0x00ff00);
}
export function RGBA(r:number,g:number,b:number) {
return (r&0xff) | ((g&0xff)<<8) | ((b&0xff)<<16) | 0xff000000;
}
export function clamp(minv:number, maxv:number, v:number) {
return (v < minv) ? minv : (v > maxv) ? maxv : v;
}

54
src/video/tms9918a.ts
View File

@ -10,7 +10,7 @@
* GNU General Public License v2.0
*/
import { hex, lpad } from "../util";
import { hex, lpad, RGBA } from "../util";
enum TMS9918A_Mode {
GRAPHICS = 0,
@ -38,7 +38,7 @@ export class TMS9918A {
addressRegister : number;
statusRegister : number;
palette : [number, number, number][];
palette : number[];
latch : boolean;
prefetchByte : number;
@ -64,6 +64,7 @@ export class TMS9918A {
canvasContext;
imageData;
datau32;
width : number;
height : number;
@ -75,22 +76,22 @@ export class TMS9918A {
this.enableFlicker = enableFlicker;
this.palette = [
[0, 0, 0],
[0, 0, 0],
[33, 200, 66],
[94, 220, 120],
[84, 85, 237],
[125, 118, 252],
[212, 82, 77],
[66, 235, 245],
[252, 85, 84],
[255, 121, 120],
[212, 193, 84],
[230, 206, 128],
[33, 176, 59],
[201, 91, 186],
[204, 204, 204],
[255, 255, 255]
RGBA(0, 0, 0),
RGBA(0, 0, 0),
RGBA(33, 200, 66),
RGBA(94, 220, 120),
RGBA(84, 85, 237),
RGBA(125, 118, 252),
RGBA(212, 82, 77),
RGBA(66, 235, 245),
RGBA(252, 85, 84),
RGBA(255, 121, 120),
RGBA(212, 193, 84),
RGBA(230, 206, 128),
RGBA(33, 176, 59),
RGBA(201, 91, 186),
RGBA(204, 204, 204),
RGBA(255, 255, 255)
];
this.canvasContext = this.canvas.getContext("2d");
@ -133,11 +134,12 @@ export class TMS9918A {
this.canvas.width = 304;
this.canvas.height = 240;
this.canvasContext.fillStyle = 'rgba(' + this.palette[7].join(',') + ',1.0)';
this.canvasContext.fillStyle = '#'+hex(this.palette[7],6);
this.canvasContext.fillRect(0, 0, this.canvas.width, this.canvas.height);
// Build the array containing the canvas bitmap (256 * 192 * 4 bytes (r,g,b,a) format each pixel)
this.imageData = this.canvasContext.getImageData(0, 0, this.canvas.width, this.canvas.height);
this.datau32 = new Uint32Array(this.imageData.data.buffer);
this.width = this.canvas.width;
this.height = this.canvas.height;
}
@ -156,9 +158,9 @@ export class TMS9918A {
}
drawScanline(y:number) {
var imageData = this.imageData.data,
var imageData = this.datau32,
width = this.width,
imageDataAddr = (y * width) << 2,
imageDataAddr = (y * width),
screenMode = this.screenMode,
textMode = this.textMode,
bitmapMode = this.bitmapMode,
@ -320,20 +322,14 @@ export class TMS9918A {
color = bgColor;
}
rgbColor = palette[color];
imageData[imageDataAddr++] = rgbColor[0]; // R
imageData[imageDataAddr++] = rgbColor[1]; // G
imageData[imageDataAddr++] = rgbColor[2]; // B
imageDataAddr++; // Skip alpha
imageData[imageDataAddr++] = rgbColor;
}
}
// Top/bottom border
else {
rgbColor = palette[bgColor];
for (x = 0; x < width; x++) {
imageData[imageDataAddr++] = rgbColor[0]; // R
imageData[imageDataAddr++] = rgbColor[1]; // G
imageData[imageDataAddr++] = rgbColor[2]; // B
imageDataAddr++; // Skip alpha
imageData[imageDataAddr++] = rgbColor;
}
}
if (y === vBorder + drawHeight) {