Embed the texture atlas data inside the exported .ps1bsp file and name those files after the actual map.

Makes it a bit easier to switch between maps for testing.

main.cpp

@@ -15,6 +15,34 @@ template<class TData> size_t writeMapData(const std::vector<TData>& data, ps1bsp
 	return fwrite(data.data(), sizeof(TData), data.size(), f);
 }
 
+size_t writeAtlasData(const char* timPath, ps1bsp_dentry_t& dentry, FILE* f)
+{
+	FILE* ftim;
+	fopen_s(&ftim, timPath, "rb");
+	if (ftim == NULL)
+		return 0;
+
+	fseek(ftim, 0, SEEK_END);
+	size_t numBytes = ftell(ftim);
+	fseek(ftim, 0, SEEK_SET);
+
+	// Round the data size up to multiples of 4 bytes, for 32-bit alignment
+	size_t numWords = numBytes / 4;
+	if (numBytes % 4 != 0)
+		numWords++;
+
+	unsigned long* timData = new unsigned long[numWords];
+	fread(timData, sizeof(unsigned char), numBytes, ftim);
+	fclose(ftim);
+
+	dentry.offset = (unsigned int)ftell(f);
+	dentry.size = numWords * 4;
+
+	size_t written = fwrite(timData, sizeof(unsigned long), numWords, f);
+	delete[] timData;
+	return written;
+}
+
 static float computeFaceArea(const world_t* world, const face_t* face)
 {
 	const plane_t* plane = &world->planes[face->plane_id];
@@ -50,7 +78,8 @@ int process_faces(const world_t* world, const TextureList& textures)
 {
 	// Write some data to a file
 	FILE* fbsp;
-	fopen_s(&fbsp, "test.ps1bsp", "wb");
+	sprintf_s(path, _MAX_PATH, "%s.ps1bsp", world->name);
+	fopen_s(&fbsp, path, "wb");
 	if (!fbsp)
 		return 0;
 
@@ -62,6 +91,8 @@ int process_faces(const world_t* world, const TextureList& textures)
 	ps1bsp_worldspawn_t outWorldSpawn = { 0 };
 
 	Tesselator tesselator(world);
+
+	printf("Analyzing %d faces...\n", world->numFaces);
 	
 	// Convert faces defined by edges into faces defined by vertex indices
 	std::vector<ps1bsp_face_t> outFaces;
@@ -126,6 +157,8 @@ int process_faces(const world_t* world, const TextureList& textures)
 		outFaces.push_back(outFace);
 	}
 
+	printf("Tesselating faces...\n");
+
 	std::vector<ps1bsp_polyvertex_t> outPolyVertices;
 	std::vector<ps1bsp_polygon_t> outPolygons;
 
@@ -254,6 +287,8 @@ int process_faces(const world_t* world, const TextureList& textures)
 		outFace->numPolygons = (unsigned char)(outPolygons.size() - outFace->firstPolygon);
 	}
 
+	printf("Converting data...\n");
+
 	// Convert vertex data
 	const auto& inVertices = tesselator.getVertices();
 	std::vector<ps1bsp_vertex_t> outVertices;
@@ -356,8 +391,12 @@ int process_faces(const world_t* world, const TextureList& textures)
 
 	outWorldSpawns.push_back(outWorldSpawn);
 
+	printf("Writing output file...\n");
+
 	// Write collected data to file and update header info
 	writeMapData(outWorldSpawns, outHeader.worldSpawn, fbsp);
+	sprintf_s(path, _MAX_PATH, "atlas-%s.tim", world->name);
+	writeAtlasData(path, outHeader.atlases, fbsp);
 	writeMapData(outTextures, outHeader.textures, fbsp);
 	writeMapData(outVertices, outHeader.vertices, fbsp);
 	writeMapData(outPolygons, outHeader.polygons, fbsp);

ps1bsp.h

@@ -29,6 +29,7 @@ typedef struct
 	u_short version;
 
 	ps1bsp_dentry_t worldSpawn;
+	ps1bsp_dentry_t atlases;
 	ps1bsp_dentry_t textures;
 	ps1bsp_dentry_t vertices;
 	ps1bsp_dentry_t polygons;
@@ -48,6 +49,11 @@ typedef struct
 	unsigned char skyColor[4];
 } ps1bsp_worldspawn_t;
 
+typedef struct
+{
+	unsigned long timData[1];	// Variable length
+} ps1bsp_atlas_t;
+
 typedef struct
 {
 	unsigned short tpage;		// Texture page in PS1 VRAM (precalculated when generating the texture atlas)

texture.cpp

@@ -29,7 +29,7 @@ Keep in mind that the coordinates will be rounded down to the next lowest textur
 // So we desaturate the palette ahead of time to more closely match the original Quake's look.
 static void desaturate(const unsigned char inColor[3], unsigned char outColor[3])
 {
-	double f = 0.15; // desaturate by 15%
+	double f = 0.1; // desaturate by 10%
 	double L = 0.3 * inColor[0] + 0.6 * inColor[1] + 0.1 * inColor[2];
 	outColor[0] = (unsigned char)((double)inColor[0] + f * (L - inColor[0]));
 	outColor[1] = (unsigned char)((double)inColor[1] + f * (L - inColor[1]));
@@ -185,6 +185,8 @@ bool process_textures(const world_t* world, TextureList& outTextures)	// TODO: r
 	const auto max_bin = rectpack2D::rect_wh(1024, 256);	// 8-bit textures take up half the horizontal space so this is 512x256 in practice, or a quarter of the PS1's VRAM allocation.
 	const auto discard_step = -4;
 
+	printf("Finding best texture packing...\n");
+
 	std::vector<rect_type> rectangles;
 
 	// Try some texture packing and see if we fit inside the PS1's VRAM
@@ -253,6 +255,8 @@ bool process_textures(const world_t* world, TextureList& outTextures)	// TODO: r
 
 	memset(outTim.imgData, 0, result_size.w * result_size.h * sizeof(unsigned char));
 
+	printf("Constructing texture atlas...\n");
+
 	// Try to construct the texture atlas, see what we get
 	for (int texNum = 0; texNum < world->mipheader.numtex; ++texNum)
 	{