From b4c2ff850930cb29da1a331b17fcc8a9e561b5ff Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Wed, 21 Jun 2023 22:42:28 +0100
Subject: Add color text

---
 src/game.c | 12 ++++++------
 src/menu.c | 10 +++++-----
 src/text.c |  4 ++--
 src/text.h |  2 +-
 src/vga.c  | 19 +++++++++++++++++++
 src/vga.h  |  2 ++
 6 files changed, 35 insertions(+), 14 deletions(-)

diff --git a/src/game.c b/src/game.c
index b5968ce..80c5a42 100644
--- a/src/game.c
+++ b/src/game.c
@@ -36,32 +36,32 @@ static void hud_render()
         /* lives */
         blitrc(binary_sprites_start, &src, &dst);
 
-        put_text(136, 4, "TIME");
-        put_text(249, 4, "STAGE");
+        put_text(136, 4, "TIME", 1);
+        put_text(249, 4, "STAGE", 1);
     }
 
     if (hud & HUD_LIVES)
     {
         sprintf(b, "%d", lives);
-        put_text(18, 4, b);
+        put_text(18, 4, b, 1);
     }
 
     if (hud & HUD_SCORE)
     {
         sprintf(b, "%06li", score);
-        put_text(34, 4, b);
+        put_text(34, 4, b, 1);
     }
 
     if (hud & HUD_TIME)
     {
         sprintf(b, "%02d", time);
-        put_text(176, 4, b);
+        put_text(176, 4, b, time > 10 ? 1 : 15);
     }
 
     if (hud & HUD_STAGE)
     {
         sprintf(b, "%02d", stage + 1);
-        put_text(297, 4, b);
+        put_text(297, 4, b, 1);
     }
 
     hud = HUD_CLEAN;
diff --git a/src/menu.c b/src/menu.c
index c95416f..a74568e 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -9,17 +9,17 @@ uint8_t run_menu()
 {
     blit_erase(0);
 
-    put_text(124, 10, "HI 000000");
+    put_text(124, 10, "HI 000000", 5);
 
     Rect dst = { 80, 45, 160, 38 };
     blit(binary_title_start, &dst);
 
-    put_text(84, 110, "PRESS SPACE TO PLAY");
+    put_text(84, 110, "PRESS SPACE TO PLAY", 1);
 
-    put_text(64, 140, "CODE, GRAPHICS AND SOUND");
-    put_text(96, 150, "JUAN J. MARTINEZ");
+    put_text(64, 140, "CODE, GRAPHICS AND SOUND", 2);
+    put_text(96, 150, "JUAN J. MARTINEZ", 3);
 
-    put_text(96, 180, "_2023 USEBOX.NET");
+    put_text(96, 180, "_2023 USEBOX.NET", 1);
 
     wait_vsync();
     blit_update();
diff --git a/src/text.c b/src/text.c
index c59b5e6..4ec4c54 100644
--- a/src/text.c
+++ b/src/text.c
@@ -3,13 +3,13 @@
 #include "vga.h"
 #include "data.h"
 
-void put_text(uint16_t x, uint16_t y, const char *text)
+void put_text(uint16_t x, uint16_t y, const char *text, uint8_t color)
 {
     Rect dst = { x, y, 8, 8};
 
     while (*text)
     {
-        blit(binary_font_start + ((*text++ - ' ') << 6), &dst);
+        blit_c(binary_font_start + ((*text++ - ' ') << 6), &dst, color);
         dst.x += 8;
     }
 }
diff --git a/src/text.h b/src/text.h
index c43b199..de9b567 100644
--- a/src/text.h
+++ b/src/text.h
@@ -1,6 +1,6 @@
 #ifndef _TEXT_H
 #define _TEXT_H
 
-void put_text(uint16_t x, uint16_t y, const char *text);
+void put_text(uint16_t x, uint16_t y, const char *text, uint8_t color);
 
 #endif /* _TEXT_H */
diff --git a/src/vga.c b/src/vga.c
index cb2c5a8..83ee2c7 100644
--- a/src/vga.c
+++ b/src/vga.c
@@ -101,6 +101,25 @@ void blit(const uint8_t *sprite, const Rect *dst)
         }
 }
 
+void blit_c(const uint8_t *sprite, const Rect *dst, uint8_t c)
+{
+    for (int32_t j = dst->y * 320; j < (dst->y + dst->h) * 320; j += 320)
+        for (int16_t i = dst->x; i < dst->x + dst->w; i++)
+        {
+            uint8_t b = *sprite++;
+
+            /* transparent */
+            if (b == TRANSPARENT)
+                continue;
+
+            /* clipping */
+            if (i < 0 || i >= 320 || j < 0 || j >= 200 * 320)
+                continue;
+
+            buffer[i + j] = b ? c : b;
+        }
+}
+
 void blitrc(const uint8_t *sprite, const Rect *src, const Rect *dst)
 {
     for (int32_t j = dst->y * 320, sy = src->y * src->w; j < (dst->y + dst->h) * 320; j += 320, sy += src->w)
diff --git a/src/vga.h b/src/vga.h
index e6642f7..7bd5779 100644
--- a/src/vga.h
+++ b/src/vga.h
@@ -21,6 +21,8 @@ void wait_vsync();
 void set_palette(const uint8_t *palette);
 
 void blit(const uint8_t *sprite, const Rect *dst);
+/* used for text: skip transparent, ignore 0, replace any other color by c */
+void blit_c(const uint8_t *sprite, const Rect *dst, uint8_t c);
 /* in src w is sprite width, h is sprite height */
 void blitrc(const uint8_t *sprite, const Rect *src, const Rect *dst);
 void blit_erase(uint8_t c);
-- 
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