diff options
Diffstat (limited to 'web/pw-visualizer/src/webgl')
| -rw-r--r-- | web/pw-visualizer/src/webgl/text.ts | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/web/pw-visualizer/src/webgl/text.ts b/web/pw-visualizer/src/webgl/text.ts index fdfbc55..cb72a42 100644 --- a/web/pw-visualizer/src/webgl/text.ts +++ b/web/pw-visualizer/src/webgl/text.ts @@ -79,7 +79,6 @@ export class Label { const verts_pos = []; const verts_tex = []; - const letterHeight = this.font.letterHeight / this.font.textureHeight; let xPos = 0; switch (h_align) { @@ -108,10 +107,17 @@ export class Label { for (let i = 0; i < text.length; i++) { const info = this.font.glyphInfos[text[i]]; if (info) { + const dx = info.width / this.font.letterHeight; - const letterWidth = info.width / this.font.textureWidth; - const x0 = info.x / this.font.textureWidth; - const y0 = info.y / this.font.textureHeight; + + // apply half-pixel correction to prevent texture bleeding + // we should address the center of each texel, not the border + // https://gamedev.stackexchange.com/questions/46963/how-to-avoid-texture-bleeding-in-a-texture-atlas + const x0 = (info.x + 0.5) / this.font.textureWidth; + const y0 = (info.y + 0.5) / this.font.textureHeight; + const letterWidth = (info.width - 1) / this.font.textureWidth; + const letterHeight = (this.font.letterHeight - 1) / this.font.textureHeight; + verts_pos.push(xPos, yStart); verts_pos.push(xPos + dx, yStart); verts_pos.push(xPos, yStart-1); |