From 2fb5b67012bce29f18db917c4ba2ed13f3d25b3f Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Thu, 10 Nov 2022 21:19:01 +0900
Subject: [PATCH] [vulkan] Implement line graph rendering

I should probably just use the line rendering for all renderers and pull
the graph drawing out to the client code.
---
 include/QF/Vulkan/qf_draw.h              |  3 +++
 libs/video/renderer/vid_render_vulkan.c  |  1 +
 libs/video/renderer/vulkan/vulkan_draw.c | 15 +++++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/include/QF/Vulkan/qf_draw.h b/include/QF/Vulkan/qf_draw.h
index fa4f83772..1edb16882 100644
--- a/include/QF/Vulkan/qf_draw.h
+++ b/include/QF/Vulkan/qf_draw.h
@@ -85,4 +85,7 @@ void Vulkan_End2D (struct vulkan_ctx_s *ctx);
 void Vulkan_DrawReset (struct vulkan_ctx_s *ctx);
 void Vulkan_FlushText (struct qfv_renderframe_s *rFrame);
 
+void Vulkan_LineGraph (int x, int y, int *h_vals, int count, int height,
+					   struct vulkan_ctx_s *ctx);
+
 #endif//__QF_Vulkan_qf_draw_h
diff --git a/libs/video/renderer/vid_render_vulkan.c b/libs/video/renderer/vid_render_vulkan.c
index 6457ba8bc..733ada82d 100644
--- a/libs/video/renderer/vid_render_vulkan.c
+++ b/libs/video/renderer/vid_render_vulkan.c
@@ -136,6 +136,7 @@ vulkan_R_NewScene (scene_t *scene)
 static void
 vulkan_R_LineGraph (int x, int y, int *h_vals, int count, int height)
 {
+	Vulkan_LineGraph (x, y, h_vals, count, height, vulkan_ctx);
 }
 
 static void
diff --git a/libs/video/renderer/vulkan/vulkan_draw.c b/libs/video/renderer/vulkan/vulkan_draw.c
index 127b6645e..f520e8ba5 100644
--- a/libs/video/renderer/vulkan/vulkan_draw.c
+++ b/libs/video/renderer/vulkan/vulkan_draw.c
@@ -1330,3 +1330,18 @@ Vulkan_Draw_FontString (int x, int y, int fontid, const char *str,
 	RText_RenderText (shaper, &text, x, y, vulkan_render_glyph, &rgctx);
 	RText_DeleteShaper (shaper);
 }
+
+void
+Vulkan_LineGraph (int x, int y, int *h_vals, int count, int height,
+				  vulkan_ctx_t *ctx)
+{
+	static int colors[] = { 0xd0, 0x4f, 0x6f };
+
+	while (count-- > 0) {
+		int         h = *h_vals++;
+		int         c = h < 9998 || h > 10000 ? 0xfe : colors[h - 9998];
+		h = min (h, height);
+		Vulkan_Draw_Line (x, y, x, y - h, c, ctx);
+		x++;
+	}
+}