1 files changed, 352 insertions, 0 deletions
diff --git a/Build/source/libs/gd/libgd-src/src/gd_tga.c b/Build/source/libs/gd/libgd-src/src/gd_tga.c
new file mode 100644
index 00000000000..756248afcea
--- /dev/null
+++ b/Build/source/libs/gd/libgd-src/src/gd_tga.c
@@ -0,0 +1,352 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "gd_tga.h"
+#include "gd.h"
+#include "gd_errors.h"
+#include "gdhelpers.h"
+
+/*!	\brief Creates a gdImage from a TGA file
+ *	Creates a gdImage from a TGA binary file via a gdIOCtx.
+ *	\param infile Pointer to TGA binary file
+ *	\return gdImagePtr
+ */
+BGD_DECLARE(gdImagePtr) gdImageCreateFromTga(FILE *fp)
+{
+	gdImagePtr image;
+	gdIOCtx* in = gdNewFileCtx(fp);
+	if (in == NULL) return NULL;
+	image = gdImageCreateFromTgaCtx(in);
+	in->gd_free( in );
+	return image;
+}
+
+BGD_DECLARE(gdImagePtr) gdImageCreateFromTgaPtr(int size, void *data)
+{
+	gdImagePtr im;
+	gdIOCtx *in = gdNewDynamicCtxEx (size, data, 0);
+	if (in == NULL) return NULL;
+	im = gdImageCreateFromTgaCtx(in);
+	in->gd_free(in);
+	return im;
+}
+
+
+/*!	\brief Creates a gdImage from a gdIOCtx
+ *	Creates a gdImage from a gdIOCtx referencing a TGA binary file.
+ *	\param ctx Pointer to a gdIOCtx structure
+ *	\return gdImagePtr
+ */
+BGD_DECLARE(gdImagePtr) gdImageCreateFromTgaCtx(gdIOCtx* ctx)
+{
+	int bitmap_caret = 0;
+	oTga *tga = NULL;
+	/*	int pixel_block_size = 0;
+		int image_block_size = 0; */
+	volatile gdImagePtr image = NULL;
+	int x = 0;
+	int y = 0;
+
+	tga = (oTga *) gdMalloc(sizeof(oTga));
+	if (!tga) {
+		return NULL;
+	}
+
+	tga->bitmap = NULL;
+	tga->ident = NULL;
+
+	if (!read_header_tga(ctx, tga)) {
+		free_tga(tga);
+		return NULL;
+	}
+
+	/*TODO: Will this be used?
+		pixel_block_size = tga->bits / 8;
+		image_block_size = (tga->width * tga->height) * pixel_block_size;
+	*/
+
+	if (read_image_tga(ctx, tga)) {
+		free_tga(tga);
+		return NULL;
+	}
+
+	image = gdImageCreateTrueColor((int)tga->width, (int)tga->height );
+
+	if (image == 0) {
+		free_tga( tga );
+		return NULL;
+	}
+
+	/*!	\brief Populate GD image object
+	 *  Copy the pixel data from our tga bitmap buffer into the GD image
+	 *  Disable blending and save the alpha channel per default
+	 */
+	if (tga->alphabits) {
+		gdImageAlphaBlending(image, 0);
+		gdImageSaveAlpha(image, 1);
+	}
+
+	/* TODO: use alphabits as soon as we support 24bit and other alpha bps (ie != 8bits) */
+	for (y = 0; y < tga->height; y++) {
+		register int *tpix = image->tpixels[y];
+		for ( x = 0; x < tga->width; x++, tpix++) {
+			if (tga->bits == TGA_BPP_24) {
+				*tpix = gdTrueColor(tga->bitmap[bitmap_caret + 2], tga->bitmap[bitmap_caret + 1], tga->bitmap[bitmap_caret]);
+				bitmap_caret += 3;
+			} else if (tga->bits == TGA_BPP_32 || tga->alphabits) {
+				register int a = tga->bitmap[bitmap_caret + 3];
+
+				*tpix = gdTrueColorAlpha(tga->bitmap[bitmap_caret + 2], tga->bitmap[bitmap_caret + 1], tga->bitmap[bitmap_caret], gdAlphaMax - (a >> 1));
+				bitmap_caret += 4;
+			}
+		}
+	}
+
+	if (tga->flipv && tga->fliph) {
+		gdImageFlipBoth(image);
+	} else if (tga->flipv) {
+		gdImageFlipVertical(image);
+	} else if (tga->fliph) {
+		gdImageFlipHorizontal(image);
+	}
+
+	free_tga(tga);
+
+	return image;
+}
+
+/*!	\brief Reads a TGA header.
+ *	Reads the header block from a binary TGA file populating the referenced TGA structure.
+ *	\param ctx Pointer to TGA binary file
+ *	\param tga Pointer to TGA structure
+ *	\return int 1 on sucess, -1 on failure
+ */
+int read_header_tga(gdIOCtx *ctx, oTga *tga)
+{
+
+	unsigned char header[18];
+
+	if (gdGetBuf(header, sizeof(header), ctx) < 18) {
+		gd_error("fail to read header");
+		return -1;
+	}
+
+	tga->identsize = header[0];
+	tga->colormaptype = header[1];
+	tga->imagetype = header[2];
+	tga->colormapstart = header[3] + (header[4] << 8);
+	tga->colormaplength = header[5] + (header[6] << 8);
+	tga->colormapbits = header[7];
+	tga->xstart = header[8] + (header[9] << 8);
+	tga->ystart = header[10] + (header[11] << 8);
+	tga->width = header[12] + (header[13] << 8);
+	tga->height = header[14] + (header[15] << 8);
+	tga->bits = header[16];
+	tga->alphabits = header[17] & 0x0f;
+	tga->fliph = (header[17] & 0x10) ? 1 : 0;
+	tga->flipv = (header[17] & 0x20) ? 0 : 1;
+
+#if DEBUG
+	printf("format bps: %i\n", tga->bits);
+	printf("flip h/v: %i / %i\n", tga->fliph, tga->flipv);
+	printf("alpha: %i\n", tga->alphabits);
+	printf("wxh: %i %i\n", tga->width, tga->height);
+#endif
+
+	switch(tga->bits) {
+	case 8:
+	case 16:
+	case 24:
+	case 32:
+		break;
+	default:
+		gd_error("bps %i not supported", tga->bits);
+		return -1;
+		break;
+	}
+
+	tga->ident = NULL;
+
+	if (tga->identsize > 0) {
+		tga->ident = (char *) gdMalloc(tga->identsize * sizeof(char));
+		if(tga->ident == NULL) {
+			return -1;
+		}
+
+		gdGetBuf( &( tga->ident ), tga->identsize, ctx );
+	}
+
+	return 1;
+}
+
+/*!	\brief Reads a TGA image data into buffer.
+ *	Reads the image data block from a binary TGA file populating the referenced TGA structure.
+ *	\param ctx Pointer to TGA binary file
+ *	\param tga Pointer to TGA structure
+ *	\return int 0 on sucess, -1 on failure
+ */
+int read_image_tga( gdIOCtx *ctx, oTga *tga )
+{
+	int pixel_block_size = (tga->bits / 8);
+	int image_block_size = (tga->width * tga->height) * pixel_block_size;
+	uint8_t* decompression_buffer = NULL;
+	unsigned char* conversion_buffer = NULL;
+	int buffer_caret = 0;
+	int bitmap_caret = 0;
+	int i = 0;
+	int j = 0;
+	uint8_t encoded_pixels;
+
+	if(overflow2(tga->width, tga->height)) {
+		return -1;
+	}
+
+	if(overflow2(tga->width * tga->height, pixel_block_size)) {
+		return -1;
+	}
+
+	if(overflow2(image_block_size, sizeof(uint8_t))) {
+		return -1;
+	}
+
+	/*!	\brief Allocate memmory for image block
+	 *  Allocate a chunk of memory for the image block to be passed into.
+	 */
+	tga->bitmap = (int *) gdMalloc(image_block_size * sizeof(uint8_t));
+	if (tga->bitmap == NULL) {
+		return -1;
+	}
+
+	/*! \todo Add image type support
+	 *  Add support for this image type.
+	 */
+	if (tga->imagetype == TGA_TYPE_INDEXED) {
+		return -1;
+	}
+
+	/*! \todo Add image type support
+	 *  Add support for this image type.
+	 */
+	if (tga->imagetype == TGA_TYPE_INDEXED_RLE) {
+		return -1;
+	}
+
+	/*! \brief Read in uncompressed RGB TGA
+	 *  Chunk load the pixel data from an uncompressed RGB type TGA.
+	 */
+	if (tga->imagetype == TGA_TYPE_RGB) {
+		conversion_buffer = (unsigned char *) gdMalloc(image_block_size * sizeof(unsigned char));
+		if (conversion_buffer == NULL) {
+			gdFree(conversion_buffer);
+			return -1;
+		}
+
+		gdGetBuf(conversion_buffer, image_block_size, ctx);
+
+		while (buffer_caret < image_block_size) {
+			tga->bitmap[buffer_caret] = (int) conversion_buffer[buffer_caret];
+			buffer_caret++;
+		}
+
+		gdFree( conversion_buffer );
+	}
+
+	/*! \brief Read in RLE compressed RGB TGA
+	 *  Chunk load the pixel data from an RLE compressed RGB type TGA.
+	 */
+	if (tga->imagetype == TGA_TYPE_RGB_RLE) {
+		decompression_buffer = (uint8_t*) gdMalloc(image_block_size * sizeof(uint8_t));
+		if (decompression_buffer == NULL) {
+			gdFree( decompression_buffer );
+			return -1;
+		}
+		conversion_buffer = (unsigned char *) gdMalloc(image_block_size * sizeof(unsigned char));
+		if (conversion_buffer == NULL) {
+			gdFree( decompression_buffer );
+			gdFree( conversion_buffer );
+			return -1;
+		}
+
+		gdGetBuf( conversion_buffer, image_block_size, ctx );
+
+		buffer_caret = 0;
+
+		while( buffer_caret < image_block_size ) {
+			decompression_buffer[buffer_caret] = (int)conversion_buffer[buffer_caret];
+			buffer_caret++;
+		}
+
+		buffer_caret = 0;
+
+		while( bitmap_caret < image_block_size ) {
+
+			if ((decompression_buffer[buffer_caret] & TGA_RLE_FLAG) == TGA_RLE_FLAG) {
+				encoded_pixels = ( ( decompression_buffer[ buffer_caret ] & 127 ) + 1 );
+				buffer_caret++;
+
+				for (i = 0; i < encoded_pixels; i++) {
+					for (j = 0; j < pixel_block_size; j++, bitmap_caret++) {
+						tga->bitmap[ bitmap_caret ] = decompression_buffer[ buffer_caret + j ];
+					}
+				}
+				buffer_caret += pixel_block_size;
+			} else {
+				encoded_pixels = decompression_buffer[ buffer_caret ] + 1;
+				buffer_caret++;
+
+				for (i = 0; i < encoded_pixels; i++) {
+					for( j = 0; j < pixel_block_size; j++, bitmap_caret++ ) {
+						tga->bitmap[ bitmap_caret ] = decompression_buffer[ buffer_caret + j ];
+					}
+					buffer_caret += pixel_block_size;
+				}
+			}
+		}
+
+		gdFree( decompression_buffer );
+		gdFree( conversion_buffer );
+
+	}
+
+	/*!	\todo Add image type support
+	 *  Add support for this image type.
+	 */
+	if( tga->imagetype == TGA_TYPE_GREYSCALE ) {
+		return -1;
+	}
+
+	/*!	\todo Add image type support
+	 *  Add support for this image type.
+	 */
+	if( tga->imagetype == TGA_TYPE_GREYSCALE_RLE ) {
+		return -1;
+	}
+
+	return 0;
+}
+
+/*!	\brief Cleans up a TGA structure.
+ *	Dereferences the bitmap referenced in a TGA structure, then the structure itself
+ *	\param tga Pointer to TGA structure
+ */
+void free_tga(oTga * tga)
+{
+	if (tga) {
+		if (tga->ident) {
+			gdFree(tga->ident);
+			tga->ident = NULL;
+		}
+		if (tga->bitmap) {
+			gdFree(tga->bitmap);
+			tga->bitmap = NULL;
+		}
+		gdFree(tga);
+		tga = NULL;
+	}
+}