# HG changeset patch
# User Michael Pavone <pavone@retrodev.com>
# Date 1541823369 28800
# Node ID e397766c30286adba7e9a78b9b7d1ca5c4136078
# Parent  9b7cba9ba541e7bb9585218abfb97d6c9ab961ab
Added VRAM debug window

diff -r 9b7cba9ba541 -r e397766c3028 bindings.c
--- a/bindings.c	Fri Nov 09 09:26:07 2018 -0800
+++ b/bindings.c	Fri Nov 09 20:16:09 2018 -0800
@@ -37,7 +37,8 @@
 	UI_SMS_PAUSE,
 	UI_SCREENSHOT,
 	UI_EXIT,
-	UI_PLANE_DEBUG
+	UI_PLANE_DEBUG,
+	UI_VRAM_DEBUG
 } ui_action;
 
 typedef struct {
@@ -388,6 +389,20 @@
 			}
 			break;
 		}
+		case UI_VRAM_DEBUG: {
+			vdp_context *vdp = NULL;
+			if (current_system->type == SYSTEM_GENESIS) {
+				genesis_context *gen = (genesis_context *)current_system;
+				vdp = gen->vdp;
+			} else if (current_system->type == SYSTEM_SMS) {
+				sms_context *sms = (sms_context *)current_system;
+				vdp = sms->vdp;
+			}
+			if (vdp) {
+				vdp_toggle_debug_view(vdp, VDP_DEBUG_VRAM);
+			}
+			break;
+		}
 		}
 		break;
 	}
@@ -593,7 +608,9 @@
 			*subtype_a = UI_EXIT;
 		} else if (!strcmp(target + 3, "plane_debug")) {
 			*subtype_a = UI_PLANE_DEBUG;
-		} else {
+		} else if (!strcmp(target + 3, "vram_debug")) {
+			*subtype_a = UI_VRAM_DEBUG;
+		}  else {
 			warning("Unreconized UI binding type %s\n", target);
 			return 0;
 		}
diff -r 9b7cba9ba541 -r e397766c3028 default.cfg
--- a/default.cfg	Fri Nov 09 09:26:07 2018 -0800
+++ b/default.cfg	Fri Nov 09 20:16:09 2018 -0800
@@ -20,6 +20,7 @@
 		u ui.enter_debugger
 		p ui.screenshot
 		b ui.plane_debug
+		v ui.vram_debug
 		esc ui.exit
 		` ui.save_state
 		0 ui.set_speed.0
diff -r 9b7cba9ba541 -r e397766c3028 vdp.c
--- a/vdp.c	Fri Nov 09 09:26:07 2018 -0800
+++ b/vdp.c	Fri Nov 09 20:16:09 2018 -0800
@@ -1824,6 +1824,35 @@
 		}
 		render_framebuffer_updated(context->debug_fb_indices[VDP_DEBUG_PLANE], 1024);
 	}
+	
+	if (context->enabled_debuggers & (1 << VDP_DEBUG_VRAM)) {
+		uint32_t pitch;
+		uint32_t *fb = render_get_framebuffer(context->debug_fb_indices[VDP_DEBUG_VRAM], &pitch);
+		
+		uint8_t pal = (context->debug_modes[VDP_DEBUG_VRAM] % 4) << 4;
+		for (int y = 0; y < 512; y++)
+		{
+			uint32_t *line = fb + y * pitch / sizeof(uint32_t);
+			int row = y >> 4;
+			int yoff = y >> 1 & 7;
+			for (int col = 0; col < 64; col++)
+			{
+				uint16_t address = (row * 64 + col) * 32 + yoff * 4;
+				for (int x = 0; x < 4; x++)
+				{
+					uint8_t byte = context->vdpmem[address++];
+					uint8_t left = byte >> 4 | pal;
+					uint8_t right = byte & 0xF | pal;
+					*(line++) = context->colors[left];
+					*(line++) = context->colors[left];
+					*(line++) = context->colors[right];
+					*(line++) = context->colors[right];
+				}
+			}
+		}
+		
+		render_framebuffer_updated(context->debug_fb_indices[VDP_DEBUG_VRAM], 1024);
+	}
 }
 
 void vdp_force_update_framebuffer(vdp_context *context)
@@ -3854,16 +3883,23 @@
 	if (context->enabled_debuggers & 1 << debug_type) {
 		//TODO: implement me
 	} else {
+		uint32_t width,height;
 		char *caption;
 		switch(debug_type)
 		{
 		case VDP_DEBUG_PLANE:
 			caption = "BlastEm - VDP Plane Debugger";
+			width = height = 1024;
+			break;
+		case VDP_DEBUG_VRAM:
+			caption = "BlastEm - VDP VRAM Debugger";
+			width = 1024;
+			height = 512;
 			break;
 		default:
 			return;
 		}
-		context->debug_fb_indices[debug_type] = render_create_window(caption, 1024, 1024);
+		context->debug_fb_indices[debug_type] = render_create_window(caption, width, height);
 		if (context->debug_fb_indices[debug_type]) {
 			context->enabled_debuggers |= 1 << debug_type;
 		}