From: Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
Date: Wed, 19 Mar 2025 17:19:31 +0000 (+0100)
Subject: rgb color conversion with byte mask
X-Git-Url: https://git.osiis.dedyn.io/?a=commitdiff_plain;h=1f23dd482f4236f9a9758a9bf2ecd9642c0a2c93;p=jp%2Fvkvg.git

rgb color conversion with byte mask
---

diff --git a/src/vkvg_context_internal.c b/src/vkvg_context_internal.c
index 7b549cd..90a0b54 100644
--- a/src/vkvg_context_internal.c
+++ b/src/vkvg_context_internal.c
@@ -1933,8 +1933,8 @@ void _draw_full_screen_quad(VkvgContext ctx, vec4 *scissor) {
     _ensure_vertex_cache_size(ctx, 3);
 
     _add_vertexf_unchecked(ctx, -1, -1);
-    _add_vertexf_unchecked(ctx, 3, -1);
-    _add_vertexf_unchecked(ctx, -1, 3);
+    _add_vertexf_unchecked(ctx,  3, -1);
+    _add_vertexf_unchecked(ctx, -1,  3);
 
     ctx->curVertOffset = ctx->vertCount;
 
diff --git a/src/vkvg_context_internal.h b/src/vkvg_context_internal.h
index 79af73c..6382c1f 100644
--- a/src/vkvg_context_internal.h
+++ b/src/vkvg_context_internal.h
@@ -56,10 +56,10 @@
 #define FULLSCREEN_BIT         0x10000000
 #define SRCTYPE_MASK           0x000000FF
 
-#define CreateRgba(r, g, b, a) ((a << 24) | (r << 16) | (g << 8) | b)
+#define CreateRgba(r, g, b, a) (((a&0xFF) << 24) | ((r&0xFF) << 16) | ((g&0xFF) << 8) | b)
 #ifdef VKVG_PREMULT_ALPHA
 #define CreateRgbaf(r, g, b, a)                                                                                        \
-    (((int)(a * 255.0f) << 24) | ((int)(b * a * 255.0f) << 16) | ((int)(g * a * 255.0f) << 8) | (int)(r * a * 255.0f))
+    ((((uint32_t)(a * 255.0f)&0xFF) << 24) | (((uint32_t)(b * a * 255.0f)&0xFF) << 16) | (((uint32_t)(g * a * 255.0f)&0xFF) << 8) | ((uint32_t)(r * a * 255.0f)&0xFF))
 #else
 #define CreateRgbaf(r, g, b, a)                                                                                        \
     (((int)(a * 255.0f) << 24) | ((int)(b * 255.0f) << 16) | ((int)(g * 255.0f) << 8) | (int)(r * 255.0f))