vtgl

Commit: 5b78f85254bbe6334da9d14d5c01682752cfa111
Parent: 850094d55c9d8e3463b16a6b37e021363bfc95f8
Author: Randy Palamar
Date:   Sun, 25 Aug 2024 00:19:33 -0600

only send updated portion of glyph to GPU

no need to waste time uploading empty space

Diffstat:
M
font.c
 | 
4
++--
M
vtgl.c
 | 
4
++--

2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/font.c b/font.c
@@ -194,7 +194,7 @@ render_glyph(FontAtlas *fa, Arena a, u32 cp, Glyph *out_glyph, u32 *out_idx)
 	cg->g.delta.x = gs->bitmap_left;
 	cg->g.delta.y = gs->bitmap_top - cg->g.size.h;
 
-	u32 *rgba_bitmap = alloc(&a, u32, MAX_FONT_SIZE * MAX_FONT_SIZE);
+	u32 *rgba_bitmap = alloc(&a, u32, cg->g.size.h * cg->g.size.w);
 	for (u32 i = 0; i < cg->g.size.h; i++) {
 		for (u32 j = 0; j < cg->g.size.w; j++) {
 			/* TODO: handled coloured glyphs */
@@ -203,7 +203,7 @@ render_glyph(FontAtlas *fa, Arena a, u32 cp, Glyph *out_glyph, u32 *out_idx)
 			} else {
 				pixel = gs->bitmap.buffer[i * cg->g.size.w + j] << 24;
 			}
-			rgba_bitmap[i * MAX_FONT_SIZE + j] = pixel;
+			rgba_bitmap[i * cg->g.size.w + j] = pixel;
 		}
 	}
 	*out_glyph = cg->g;
diff --git a/vtgl.c b/vtgl.c
@@ -132,7 +132,7 @@ update_font_textures(Term *t)
 		if (data) {
 			ASSERT(depth_idx);
 			glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, depth_idx,
-			                MAX_FONT_SIZE, MAX_FONT_SIZE, 1, GL_RGBA,
+			                g.size.w, g.size.h, 1, GL_RGBA,
 			                GL_UNSIGNED_BYTE, data);
 		}
 	}
@@ -177,7 +177,7 @@ get_gpu_glyph_index(Term *t, u32 codepoint, Glyph *out_glyph)
 	if (data) {
 		ASSERT(depth_idx);
 		glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, depth_idx,
-		                MAX_FONT_SIZE, MAX_FONT_SIZE, 1, GL_RGBA,
+		                out_glyph->size.w, out_glyph->size.h, 1, GL_RGBA,
 		                GL_UNSIGNED_BYTE, data);
 	}
 	return depth_idx;