diff options
Diffstat (limited to 'modules/tga')
| -rw-r--r-- | modules/tga/image_loader_tga.cpp | 25 | ||||
| -rw-r--r-- | modules/tga/image_loader_tga.h | 24 |
2 files changed, 34 insertions, 15 deletions
diff --git a/modules/tga/image_loader_tga.cpp b/modules/tga/image_loader_tga.cpp index 2da9159228..ef53661557 100644 --- a/modules/tga/image_loader_tga.cpp +++ b/modules/tga/image_loader_tga.cpp @@ -56,6 +56,10 @@ Error ImageLoaderTGA::decode_tga_rle(const uint8_t *p_compressed_buffer, size_t compressed_pos += 1; count = (c & 0x7f) + 1; + if (output_pos + count * p_pixel_size > output_pos) { + return ERR_PARSE_ERROR; + } + if (c & 0x80) { for (size_t i = 0; i < p_pixel_size; i++) { pixels_w[i] = p_compressed_buffer[compressed_pos]; @@ -79,7 +83,7 @@ Error ImageLoaderTGA::decode_tga_rle(const uint8_t *p_compressed_buffer, size_t return OK; } -Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buffer, const tga_header_s &p_header, const uint8_t *p_palette, const bool p_is_monochrome) { +Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buffer, const tga_header_s &p_header, const uint8_t *p_palette, const bool p_is_monochrome, size_t p_output_size) { #define TGA_PUT_PIXEL(r, g, b, a) \ int image_data_ofs = ((y * width) + x); \ image_data_w[image_data_ofs * 4 + 0] = r; \ @@ -130,6 +134,9 @@ Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buff if (p_is_monochrome) { while (y != y_end) { while (x != x_end) { + if (i > p_output_size) { + return ERR_PARSE_ERROR; + } uint8_t shade = p_buffer[i]; TGA_PUT_PIXEL(shade, shade, shade, 0xff) @@ -143,6 +150,9 @@ Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buff } else { while (y != y_end) { while (x != x_end) { + if (i > p_output_size) { + return ERR_PARSE_ERROR; + } uint8_t index = p_buffer[i]; uint8_t r = 0x00; uint8_t g = 0x00; @@ -171,6 +181,10 @@ Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buff } else if (p_header.pixel_depth == 24) { while (y != y_end) { while (x != x_end) { + if (i + 2 > p_output_size) { + return ERR_PARSE_ERROR; + } + uint8_t r = p_buffer[i + 2]; uint8_t g = p_buffer[i + 1]; uint8_t b = p_buffer[i + 0]; @@ -186,6 +200,10 @@ Error ImageLoaderTGA::convert_to_image(Ref<Image> p_image, const uint8_t *p_buff } else if (p_header.pixel_depth == 32) { while (y != y_end) { while (x != x_end) { + if (i + 3 > p_output_size) { + return ERR_PARSE_ERROR; + } + uint8_t a = p_buffer[i + 3]; uint8_t r = p_buffer[i + 2]; uint8_t g = p_buffer[i + 1]; @@ -279,7 +297,7 @@ Error ImageLoaderTGA::load_image(Ref<Image> p_image, FileAccess *f, bool p_force const uint8_t *src_image_r = src_image.ptr(); const size_t pixel_size = tga_header.pixel_depth >> 3; - const size_t buffer_size = (tga_header.image_width * tga_header.image_height) * pixel_size; + size_t buffer_size = (tga_header.image_width * tga_header.image_height) * pixel_size; Vector<uint8_t> uncompressed_buffer; uncompressed_buffer.resize(buffer_size); @@ -297,11 +315,12 @@ Error ImageLoaderTGA::load_image(Ref<Image> p_image, FileAccess *f, bool p_force } } else { buffer = src_image_r; + buffer_size = src_image_len; }; if (err == OK) { const uint8_t *palette_r = palette.ptr(); - err = convert_to_image(p_image, buffer, tga_header, palette_r, is_monochrome); + err = convert_to_image(p_image, buffer, tga_header, palette_r, is_monochrome, buffer_size); } } diff --git a/modules/tga/image_loader_tga.h b/modules/tga/image_loader_tga.h index 249e33411e..cb2ce07edd 100644 --- a/modules/tga/image_loader_tga.h +++ b/modules/tga/image_loader_tga.h @@ -57,23 +57,23 @@ class ImageLoaderTGA : public ImageFormatLoader { }; struct tga_header_s { - uint8_t id_length; - uint8_t color_map_type; + uint8_t id_length = 0; + uint8_t color_map_type = 0; tga_type_e image_type; - uint16_t first_color_entry; - uint16_t color_map_length; - uint8_t color_map_depth; + uint16_t first_color_entry = 0; + uint16_t color_map_length = 0; + uint8_t color_map_depth = 0; - uint16_t x_origin; - uint16_t y_origin; - uint16_t image_width; - uint16_t image_height; - uint8_t pixel_depth; - uint8_t image_descriptor; + uint16_t x_origin = 0; + uint16_t y_origin = 0; + uint16_t image_width = 0; + uint16_t image_height = 0; + uint8_t pixel_depth = 0; + uint8_t image_descriptor = 0; }; static Error decode_tga_rle(const uint8_t *p_compressed_buffer, size_t p_pixel_size, uint8_t *p_uncompressed_buffer, size_t p_output_size); - static Error convert_to_image(Ref<Image> p_image, const uint8_t *p_buffer, const tga_header_s &p_header, const uint8_t *p_palette, const bool p_is_monochrome); + static Error convert_to_image(Ref<Image> p_image, const uint8_t *p_buffer, const tga_header_s &p_header, const uint8_t *p_palette, const bool p_is_monochrome, size_t p_output_size); public: virtual Error load_image(Ref<Image> p_image, FileAccess *f, bool p_force_linear, float p_scale); |