From adabbf5f30729092a64fa1059bbc7d7b09d6b24e Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sun, 29 Oct 2023 15:35:42 -0600
Subject: rtl/gfx: implement double-buffered scanout

---
 rtl/gfx/gfx_defs.sv | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'rtl/gfx/gfx_defs.sv')

diff --git a/rtl/gfx/gfx_defs.sv b/rtl/gfx/gfx_defs.sv
index b1f8bb8..01b7116 100644
--- a/rtl/gfx/gfx_defs.sv
+++ b/rtl/gfx/gfx_defs.sv
@@ -20,4 +20,27 @@ typedef logic[1:0] index4;
 `define INDEX4_MIN 2'b00
 `define INDEX4_MAX 2'b11
 
+typedef logic[9:0]  y_coord;
+typedef logic[8:0]  x_coord;
+typedef logic[18:0] linear_coord;
+typedef logic[19:0] half_coord;
+
+`define GFX_X_RES      640
+`define GFX_Y_RES      480
+`define GFX_LINEAR_RES (`GFX_X_RES * `GFX_Y_RES)
+
+typedef struct packed
+{
+	logic[7:0] r, g, b;
+} rgb24;
+
+typedef struct packed
+{
+	logic[9:0] r, g, b;
+} rgb30;
+
+`define GFX_MASK_SRAM_STAGES 3
+`define GFX_MASK_STAGES      (1 + `GFX_MASK_SRAM_STAGES + 1)
+`define GFX_SCAN_STAGES      3 // Ajustable
+
 `endif
-- 
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