From 11688cf348f283dc1f95957338137fe8dd958c71 Mon Sep 17 00:00:00 2001
From: Mikhail Burakov <mburakov@mailbox.org>
Date: Wed, 13 Jan 2021 14:27:14 +0100
Subject: Add text rendering and update pui interface types

---
 pui.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

(limited to 'pui.c')

diff --git a/pui.c b/pui.c
index cb89991..660ac4b 100644
--- a/pui.c
+++ b/pui.c
@@ -33,19 +33,19 @@ struct PuiElement {
 static_assert(sizeof(struct PuiHeader) == 4, "Invalid PuiHeader size");
 static_assert(sizeof(struct PuiElement) == 4, "Invalid PuiElement size");
 
-int PuiGetWidth(const void* pui_data) {
+size_t PuiGetWidth(const void* pui_data) {
   const struct PuiHeader* pui_header = pui_data;
-  int sx = pui_header->scale >> 4;
-  return pui_header->w << sx;
+  size_t sx = pui_header->scale >> 4;
+  return (size_t)pui_header->w << sx;
 }
 
-int PuiGetHeight(const void* pui_data) {
+size_t PuiGetHeight(const void* pui_data) {
   const struct PuiHeader* pui_header = pui_data;
-  int sy = pui_header->scale & 0xf;
-  return pui_header->h << sy;
+  size_t sy = pui_header->scale & 0xf;
+  return (size_t)pui_header->h << sy;
 }
 
-int PuiHitTest(const void* pui_data, int x, int y) {
+int PuiHitTest(const void* pui_data, size_t x, size_t y) {
   int result = 0;
   const struct PuiHeader* pui_header = pui_data;
   x >>= pui_header->scale >> 4;
@@ -61,28 +61,29 @@ int PuiHitTest(const void* pui_data, int x, int y) {
   return result;
 }
 
-void PuiRender(const void* pui_data, void* buffer, int stride, int active) {
+void PuiRender(const void* pui_data, void* buffer, size_t stride, int active) {
   const struct PuiHeader* pui_header = pui_data;
-  int width = pui_header->w << (pui_header->scale >> 4);
-  int height = pui_header->h << (pui_header->scale & 0xf);
-  int elements = pui_header->count >> 4;
-  int colors = pui_header->count & 0xf;
+  size_t width = PuiGetWidth(pui_data);
+  size_t height = PuiGetHeight(pui_data);
+  size_t size = width * height;
+  size_t elements = pui_header->count >> 4;
+  size_t colors = pui_header->count & 0xf;
   const uint32_t* palettes[] = {
       (const uint32_t*)pui_data + 1 + elements,
       (const uint32_t*)pui_data + 1 + elements + colors,
   };
   const uint8_t* bitmap_data =
       (const uint8_t*)pui_data + 4 * (1 + elements + 2 * colors);
-  for (int idx = 0, counter = 0, offset = 0; offset < width * height; idx++) {
-    int value = bitmap_data[idx >> 1];
+  for (size_t idx = 0, counter = 0, offset = 0; offset < size; idx++) {
+    uint8_t value = bitmap_data[idx >> 1];
     if (~idx & 1) value = value >> 4;
     if (value & 0x8) {
       counter = counter << 3 | (value & 0x7);
       continue;
     }
     for (counter = counter ? counter + 2 : 1; counter-- > 0; offset++) {
-      int x = offset % width;
-      int y = offset / width;
+      size_t x = offset % width;
+      size_t y = offset / width;
       int palette = !!(PuiHitTest(pui_data, x, y) & active);
       ((uint32_t*)buffer)[x + y * stride] = palettes[palette][value & 0x7];
     }
-- 
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