From 97d4a60cfb635f59c2e35e144ce3337046f84977 Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Mon, 29 Jul 2019 21:04:04 -0700
Subject: GLK: Implemented debugger dumppic command

---
 engines/glk/debugger.cpp | 90 +++++++++++++++++++++++++++++++++++++++++++++---
 engines/glk/debugger.h   |  7 ++++
 2 files changed, 92 insertions(+), 5 deletions(-)

diff --git a/engines/glk/debugger.cpp b/engines/glk/debugger.cpp
index 57188db756..2f13f6bfbd 100644
--- a/engines/glk/debugger.cpp
+++ b/engines/glk/debugger.cpp
@@ -20,14 +20,17 @@
  *
  */
 
-#include "common/file.h"
-#include "glk/glk.h"
 #include "glk/debugger.h"
+#include "glk/glk.h"
+#include "glk/raw_decoder.h"
+#include "common/file.h"
+#include "graphics/managed_surface.h"
+#include "image/png.h"
 
 namespace Glk {
 
 Debugger::Debugger(GlkEngine *vm) : GUI::Debugger(), _vm(vm) {
-	registerCmd("dumppic", WRAP_METHOD(Debugger, cmdExit));
+	registerCmd("dumppic", WRAP_METHOD(Debugger, cmdDumpPic));
 }
 
 int Debugger::strToInt(const char *s) {
@@ -48,13 +51,90 @@ int Debugger::strToInt(const char *s) {
 
 bool Debugger::cmdDumpPic(int argc, const char **argv) {
 	if (argc != 2) {
-		debugPrintf("Format: dumppic <picture number>");
+		debugPrintf("Format: dumppic <picture number>\n");
 	} else {
+		Common::File f;
 		int picNum = strToInt(argv[1]);
-		warning("TODO: dumpPic %d", picNum);
+
+		Common::String filename = Common::String::format("pic%d.png", picNum);
+		if (!f.exists(filename))
+			filename = Common::String::format("pic%d.jpg", picNum);
+
+		if (f.open(filename)) {
+			// png or jpeg file
+			Common::DumpFile df;
+			if (df.open(filename)) {
+				// Write out a copy of the file
+				byte *data = new byte[f.size()];
+				f.read(data, f.size());
+				df.write(data, f.size());
+				delete[] data;
+				df.close();
+
+				debugPrintf("Dumped picture\n");
+			} else {
+				debugPrintf("Could not find specified picture\n");
+			}
+		} else if (f.exists(Common::String::format("pic%d.rect"))) {
+			debugPrintf("Picture is only a placeholder rectangle\n");
+		} else if (f.open(Common::String::format("pic%d.raw", picNum))) {
+			// Raw picture
+#ifdef USE_PNG
+			Common::DumpFile df;
+			RawDecoder rd;
+
+			if (rd.loadStream(f) && df.open(Common::String::format("pic%d.png", picNum))) {
+				saveRawPicture(rd, df);
+				debugPrintf("Dumped picture\n");
+			} else {
+				debugPrintf("Couldn't save picture\n");
+			}
+#else
+			debugPrintf("PNG support needed to dump raw pictures\n");
+#endif
+		} else {
+			debugPrintf("No such picture exists\n");
+		}
 	}
 
 	return true;
 }
 
+void Debugger::saveRawPicture(const RawDecoder &rd, Common::WriteStream &ws) {
+#ifdef USE_PNG
+	const Graphics::Surface *surface = rd.getSurface();
+	const byte *palette = rd.getPalette();
+	int paletteCount = rd.getPaletteColorCount();
+	int palStart = rd.getPaletteStartIndex();
+	int transColor = rd.getTransparentColor();
+
+	// If the image doesn't have a palette, we can directly write out the image
+	if (!palette) {
+		Image::writePNG(ws, *surface);
+		return;
+	}
+
+	// Create a new RGBA temporary surface
+	Graphics::PixelFormat format(4, 8, 8, 8, 8, 24, 16, 8, 0);
+	Graphics::ManagedSurface destSurface(surface->w, surface->h, format);
+
+	for (uint y = 0; y < surface->h; ++y) {
+		const byte *srcP = (const byte *)surface->getBasePtr(0, y);
+		uint32 *destP = (uint32 *)destSurface.getBasePtr(0, y);
+
+		for (uint x = 0; x < surface->w; ++x, ++srcP, ++destP) {
+			if ((int)*srcP == transColor || (int)*srcP < palStart) {
+				*destP = format.ARGBToColor(0, 0, 0, 0);
+			} else {
+				assert(*srcP < paletteCount);
+				const byte *palP = &palette[*srcP * 3];
+				*destP = format.ARGBToColor(255, palP[0], palP[1], palP[2]);
+			}
+		}
+	}
+
+	Image::writePNG(ws, destSurface);
+#endif
+}
+
 } // End of namespace Glk
diff --git a/engines/glk/debugger.h b/engines/glk/debugger.h
index d09ef99ae8..0555829a95 100644
--- a/engines/glk/debugger.h
+++ b/engines/glk/debugger.h
@@ -24,7 +24,9 @@
 #define GLK_DEBUGGER_H
 
 #include "common/scummsys.h"
+#include "common/stream.h"
 #include "gui/debugger.h"
+#include "glk/raw_decoder.h"
 
 namespace Glk {
 
@@ -34,6 +36,11 @@ class Debugger : public GUI::Debugger {
 private:
 	GlkEngine *_vm;
 
+	/**
+	 * Saves a decoded raw image to a PNG file
+	 */
+	void saveRawPicture(const RawDecoder &rd, Common::WriteStream &ws);
+
 	/**
 	 * Dump a picture
 	 */
-- 
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