improve glow rendering

src/gfx/pxl8_glows.c

@@ -0,0 +1,59 @@
+#include "pxl8_glows.h"
+
+#include <stdlib.h>
+
+struct pxl8_glows {
+    pxl8_glow_source* data;
+    u32 capacity;
+    u32 count;
+};
+
+pxl8_glows* pxl8_glows_create(u32 capacity) {
+    pxl8_glows* glows = calloc(1, sizeof(pxl8_glows));
+    if (!glows) return NULL;
+
+    glows->data = calloc(capacity, sizeof(pxl8_glow_source));
+    if (!glows->data) {
+        free(glows);
+        return NULL;
+    }
+
+    glows->capacity = capacity;
+    glows->count = 0;
+
+    return glows;
+}
+
+void pxl8_glows_destroy(pxl8_glows* glows) {
+    if (!glows) return;
+    free(glows->data);
+    free(glows);
+}
+
+void pxl8_glows_add(pxl8_glows* glows, i16 x, i16 y, u8 radius, u16 intensity, u8 color, u8 shape) {
+    if (!glows || glows->count >= glows->capacity) return;
+
+    pxl8_glow_source* g = &glows->data[glows->count++];
+    g->x = x;
+    g->y = y;
+    g->radius = radius;
+    g->intensity = intensity;
+    g->color = color;
+    g->shape = shape;
+    g->depth = 0xFFFF;
+    g->height = 0;
+}
+
+void pxl8_glows_clear(pxl8_glows* glows) {
+    if (!glows) return;
+    glows->count = 0;
+}
+
+u32 pxl8_glows_count(const pxl8_glows* glows) {
+    return glows ? glows->count : 0;
+}
+
+void pxl8_glows_render(pxl8_glows* glows, pxl8_gfx* gfx) {
+    if (!glows || !gfx || glows->count == 0) return;
+    pxl8_gfx_apply_effect(gfx, PXL8_GFX_EFFECT_GLOWS, glows->data, glows->count);
+}

src/gfx/pxl8_glows.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "pxl8_gfx.h"
+#include "pxl8_types.h"
+
+typedef struct pxl8_glows pxl8_glows;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+pxl8_glows* pxl8_glows_create(u32 capacity);
+void pxl8_glows_destroy(pxl8_glows* glows);
+
+void pxl8_glows_add(pxl8_glows* glows, i16 x, i16 y, u8 radius, u16 intensity, u8 color, u8 shape);
+void pxl8_glows_clear(pxl8_glows* glows);
+u32 pxl8_glows_count(const pxl8_glows* glows);
+void pxl8_glows_render(pxl8_glows* glows, pxl8_gfx* gfx);
+
+#ifdef __cplusplus
+}
+#endif