X-Git-Url: https://harrygodden.com/git/?p=fishladder.git;a=blobdiff_plain;f=texsheet.c;fp=texsheet.c;h=f420866bd1a6dfc5ef6d9f5b033fb7e3f4bf0d97;hp=0000000000000000000000000000000000000000;hb=3cb144985169da3cea1c21a7b0bfba8d43c28fdb;hpb=aa435c13e7184bcd2034b8af1b20db1063baf9ec

diff --git a/texsheet.c b/texsheet.c
new file mode 100644
index 0000000..f420866
--- /dev/null
+++ b/texsheet.c
@@ -0,0 +1,214 @@
+// Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
+
+#define VG_TOOLS
+#include "vg/vg.h"
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb/stb_image.h"
+
+struct image_src
+{
+	int x,y,ch;
+
+	u8 *data;
+};
+
+int image_sort( const void* a, const void* b)
+{
+	struct image_src *p_a = (struct image_src *)a;
+	struct image_src *p_b = (struct image_src *)b;
+
+	if( p_a->x == p_b->x )
+		return 0;
+	else if ( p_a->x < p_b->x )
+		return 1;
+	else 
+		return -1;
+}
+
+int main( int argc, const char *argv[] )
+{
+	struct image_src *source_images = malloc( sizeof( struct image_src ) * argc );
+
+	u32 num_images = 0;
+	
+	if( argc < 4 )
+	{
+		vg_error( "Missing output file paths\n" );
+		return 0;
+	}
+
+	// Open header handle
+	// ------------------
+	FILE *fp = fopen( argv[2], "w" );
+	if( !fp )
+	{
+		vg_error( "Could not open file for writing\n" );
+		return 0;
+	}
+
+	fprintf( fp, "static enum %s_index\n{\n", argv[3] );
+
+	// Load images
+	// -----------
+	stbi_set_flip_vertically_on_load(1);
+
+	for( int i = 4; i < argc; i ++ )
+	{
+		struct image_src *src = &source_images[ num_images ];
+		src->data = (u8 *)stbi_load( argv[i], &src->x, &src->y, &src->ch, 4 );
+		
+		char name[ 256 ];
+		int j = 0; int ext = 0;
+		for( ; j < vg_list_size( name )-1; j ++ )
+		{
+			if( argv[i][j] )
+			{
+				name[j] = argv[i][j];
+
+				if( name[j] == '.' )
+					ext = j;
+
+				if( name[j] == '.' || name[j] == '-' )
+					name[j] = '_';
+			}
+			else
+				break;
+		}
+
+		if( ext )
+			name[ext] = 0x00;
+		else
+			name[j] = 0x00;
+
+		fprintf( fp, "\tk_sprite_%s,\n", name );
+
+		if( src->data )
+		{
+			if( src->x != src->y )
+			{
+				vg_error( "Non-square images are currently not supported ('%s')\n", argv[i] );
+				free( src->data );
+			}
+			else
+				num_images ++;
+		}
+		else
+			vg_error( "Could not decode '%s'\n", argv[i] );
+	}
+	
+	fprintf( fp, "};\n\n" );
+
+	// Sort by size
+	// ------------
+	qsort( source_images, num_images, sizeof(struct image_src), image_sort );
+
+	// Process images
+	// --------------
+	fprintf( fp, "static struct vg_sprite %s[] = \n{\n", argv[3] );
+
+	u8 *dest = (u8 *)malloc( 1024*1024*4 );
+	
+	// Clear (temp)
+	for( int i = 0; i < 1024*1024; i ++ )
+	{
+		dest[ i*4 + 0 ] = 0;
+		dest[ i*4 + 1 ] = 0;
+		dest[ i*4 + 2 ] = 128;
+		dest[ i*4 + 3 ] = 255;
+	}
+
+	struct region
+	{
+		v2i p0;
+		v2i p1;
+	}
+	region_stack[ 32 ] =
+	{
+		{
+			.p0 = { 0, 0 },
+			.p1 = { 1024, 1024 }
+		}
+	};
+	int stack_h = 0;
+
+	int sf = 64;
+
+	for( int i = 0; i < num_images; i ++ )
+	{
+		struct image_src *psrc = &source_images[ i ];
+
+		// Region checks
+		while( 1 )
+		{
+			struct region *pregion = &region_stack[ stack_h ];
+
+			if( (pregion->p0[ 0 ] + psrc->x <= pregion->p1[0]) && (pregion->p0[ 1 ] + psrc->y <= pregion->p1[1]) )
+			{
+				// Passed, add image and create subdivisions
+				fprintf( fp, "\t{ %hu, %hu, %hu, %hu },\n", 
+					(u16)(sf * pregion->p0[0]), 
+					(u16)(sf * pregion->p0[1]), 
+					(u16)(sf * psrc->x),
+					(u16)(sf * psrc->y)
+				);
+
+				// Write image
+				for( int y = 0; y < psrc->y; y ++ )
+				{
+					int px = pregion->p0[0];
+					int py = pregion->p0[1] + y;
+
+					memcpy( &dest[ (py*1024+px) * 4 ], &psrc->data[ y*psrc->x*4 ], psrc->x*4 );
+				}
+
+				// Subdivisions
+				stack_h ++;
+				struct region *new_region = &region_stack[ stack_h ];
+
+				new_region->p0[0] = pregion->p0[0] + psrc->x;
+				new_region->p0[1] = pregion->p0[1];
+				new_region->p1[0] = pregion->p1[0];
+				new_region->p1[1] = pregion->p0[1] + psrc->y;
+
+				pregion->p0[ 1 ] += psrc->y;
+				break;
+			}
+			else
+			{
+				// Failed, loop up to next region if can
+				if( stack_h == 0 )
+				{
+					vg_error( "Could not fit image %d. Pack failed\n", i );
+
+					goto IL_END_ERR;
+				}
+				else
+					stack_h --;
+			}
+		}
+	}
+
+IL_END_ERR:
+	fprintf( fp, "};" );
+	fclose( fp );
+
+	// Write output
+	// ------------
+	qoi_write( argv[1], dest, &(qoi_desc){
+		.width = 1024,
+		.height = 1024,
+		.channels = 4,
+		.colorspace = QOI_SRGB
+	});
+
+	// Free
+	// ----
+	for( int i = 0; i < num_images; i ++ )
+		free( source_images[ i ].data );
+	free( dest );
+	free( source_images );
+
+	vg_success( "Processed %u images\n", num_images );
+
+}