| From 4f8e26f2a40ffaa3a5b77be6a49989a1a42e2b83 Mon Sep 17 00:00:00 2001 |
| From: "Christoph M. Becker" <cmbecker69@gmx.de> |
| Date: Tue, 16 Aug 2016 14:27:23 +0200 |
| Subject: [PATCH] Fix #290: TGA RLE decoding is broken |
| |
| We make it work only, for now. Actually, it doesn't make sense that |
| `oTga::bitmap` is an `int *` as we're storing only bytes there. If this |
| will be changed, we can even get rid of the `conversion_buffer` in |
| `read_image_tga` altogether, and read the image data into the |
| `decompression_buffer` (if RLE'd) or the `tga->bitmap` (if uncompressed) |
| directly. |
| |
| Upstream-Status: Backport |
| |
| Signed-off-by: Catalin Enache <catalin.enache@windriver.com> |
| --- |
| src/gd_tga.c | 18 ++++++++++-------- |
| tests/tga/CMakeLists.txt | 1 + |
| tests/tga/Makemodule.am | 8 ++++++-- |
| tests/tga/tga_read.c | 40 ++++++++++++++++++++++++++++++++++++++++ |
| tests/tga/tga_read_rgb.png | Bin 0 -> 2349 bytes |
| tests/tga/tga_read_rgb.tga | Bin 0 -> 90444 bytes |
| tests/tga/tga_read_rgb_rle.tga | Bin 0 -> 9987 bytes |
| 7 files changed, 57 insertions(+), 10 deletions(-) |
| create mode 100644 tests/tga/tga_read.c |
| create mode 100644 tests/tga/tga_read_rgb.png |
| create mode 100644 tests/tga/tga_read_rgb.tga |
| create mode 100644 tests/tga/tga_read_rgb_rle.tga |
| |
| diff --git a/src/gd_tga.c b/src/gd_tga.c |
| index ec6781f..8737b04 100644 |
| --- a/src/gd_tga.c |
| +++ b/src/gd_tga.c |
| @@ -207,12 +207,13 @@ 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; |
| + int* decompression_buffer = NULL; |
| unsigned char* conversion_buffer = NULL; |
| int buffer_caret = 0; |
| int bitmap_caret = 0; |
| int i = 0; |
| int encoded_pixels; |
| + int rle_size; |
| |
| if(overflow2(tga->width, tga->height)) { |
| return -1; |
| @@ -266,7 +267,7 @@ int read_image_tga( gdIOCtx *ctx, oTga *tga ) |
| /*! \brief Read in RLE compressed RGB TGA |
| * Chunk load the pixel data from an RLE compressed RGB type TGA. |
| */ |
| - decompression_buffer = (uint8_t*) gdMalloc(image_block_size * sizeof(uint8_t)); |
| + decompression_buffer = (int*) gdMalloc(image_block_size * sizeof(int)); |
| if (decompression_buffer == NULL) { |
| return -1; |
| } |
| @@ -277,7 +278,8 @@ int read_image_tga( gdIOCtx *ctx, oTga *tga ) |
| return -1; |
| } |
| |
| - if (gdGetBuf(conversion_buffer, image_block_size, ctx) != image_block_size) { |
| + rle_size = gdGetBuf(conversion_buffer, image_block_size, ctx); |
| + if (rle_size <= 0) { |
| gdFree(conversion_buffer); |
| gdFree(decompression_buffer); |
| return -1; |
| @@ -285,7 +287,7 @@ int read_image_tga( gdIOCtx *ctx, oTga *tga ) |
| |
| buffer_caret = 0; |
| |
| - while( buffer_caret < image_block_size) { |
| + while( buffer_caret < rle_size) { |
| decompression_buffer[buffer_caret] = (int)conversion_buffer[buffer_caret]; |
| buffer_caret++; |
| } |
| @@ -298,14 +300,14 @@ int read_image_tga( gdIOCtx *ctx, oTga *tga ) |
| encoded_pixels = ( ( decompression_buffer[ buffer_caret ] & ~TGA_RLE_FLAG ) + 1 ); |
| buffer_caret++; |
| |
| - if ((bitmap_caret + (encoded_pixels * pixel_block_size)) >= image_block_size) { |
| + if ((bitmap_caret + (encoded_pixels * pixel_block_size)) > image_block_size) { |
| gdFree( decompression_buffer ); |
| gdFree( conversion_buffer ); |
| return -1; |
| } |
| |
| for (i = 0; i < encoded_pixels; i++) { |
| - memcpy(tga->bitmap + bitmap_caret, decompression_buffer + buffer_caret, pixel_block_size); |
| + memcpy(tga->bitmap + bitmap_caret, decompression_buffer + buffer_caret, pixel_block_size * sizeof(int)); |
| bitmap_caret += pixel_block_size; |
| } |
| buffer_caret += pixel_block_size; |
| @@ -314,13 +316,13 @@ int read_image_tga( gdIOCtx *ctx, oTga *tga ) |
| encoded_pixels = decompression_buffer[ buffer_caret ] + 1; |
| buffer_caret++; |
| |
| - if ((bitmap_caret + (encoded_pixels * pixel_block_size)) >= image_block_size) { |
| + if ((bitmap_caret + (encoded_pixels * pixel_block_size)) > image_block_size) { |
| gdFree( decompression_buffer ); |
| gdFree( conversion_buffer ); |
| return -1; |
| } |
| |
| - memcpy(tga->bitmap + bitmap_caret, decompression_buffer + buffer_caret, encoded_pixels * pixel_block_size); |
| + memcpy(tga->bitmap + bitmap_caret, decompression_buffer + buffer_caret, encoded_pixels * pixel_block_size * sizeof(int)); |
| bitmap_caret += (encoded_pixels * pixel_block_size); |
| buffer_caret += (encoded_pixels * pixel_block_size); |
| } |
| diff --git a/tests/tga/CMakeLists.txt b/tests/tga/CMakeLists.txt |
| index c3a589c..789fb14 100644 |
| --- a/tests/tga/CMakeLists.txt |
| +++ b/tests/tga/CMakeLists.txt |
| @@ -5,6 +5,7 @@ LIST(APPEND TESTS_FILES |
| bug00247a |
| bug00248 |
| bug00248a |
| + tga_read |
| ) |
| |
| ADD_GD_TESTS() |
| diff --git a/tests/tga/Makemodule.am b/tests/tga/Makemodule.am |
| index dff828f..a1e6af6 100644 |
| --- a/tests/tga/Makemodule.am |
| +++ b/tests/tga/Makemodule.am |
| @@ -4,7 +4,8 @@ libgd_test_programs += \ |
| tga/bug00247a \ |
| tga/bug00248 \ |
| tga/bug00248a \ |
| - tga/tga_null |
| + tga/tga_null \ |
| + tga/tga_read |
| |
| EXTRA_DIST += \ |
| tga/CMakeLists.txt \ |
| @@ -12,4 +13,7 @@ EXTRA_DIST += \ |
| tga/bug00247.tga \ |
| tga/bug00247a.tga \ |
| tga/bug00248.tga \ |
| - tga/bug00248a.tga |
| + tga/bug00248a.tga \ |
| + tga/tga_read_rgb.png \ |
| + tga/tga_read_rgb.tga \ |
| + tga/tga_read_rgb_rle.tga |
| diff --git a/tests/tga/tga_read.c b/tests/tga/tga_read.c |
| new file mode 100644 |
| index 0000000..310b72f |
| --- /dev/null |
| +++ b/tests/tga/tga_read.c |
| @@ -0,0 +1,40 @@ |
| +/** |
| + * Basic test case for reading TGA files. |
| + */ |
| + |
| + |
| +#include "gd.h" |
| +#include "gdtest.h" |
| + |
| + |
| +static void assert_equals(char *exp, char *orig); |
| + |
| + |
| +int main() |
| +{ |
| + assert_equals("tga_read_rgb.png", "tga_read_rgb.tga"); |
| + assert_equals("tga_read_rgb.png", "tga_read_rgb_rle.tga"); |
| + |
| + return gdNumFailures(); |
| +} |
| + |
| + |
| +static void assert_equals(char *exp, char *orig) |
| +{ |
| + gdImagePtr im; |
| + FILE *fp; |
| + char *filename; |
| + |
| + fp = gdTestFileOpen2("tga", orig); |
| + gdTestAssertMsg(fp != NULL, "can't open %s", orig); |
| + |
| + im = gdImageCreateFromTga(fp); |
| + gdTestAssertMsg(im != NULL, "can't read %s", orig); |
| + fclose(fp); |
| + |
| + filename = gdTestFilePath2("tga", exp); |
| + gdAssertImageEqualsToFile(filename, im); |
| + gdFree(filename); |
| + |
| + gdImageDestroy(im); |
| +} |
| diff --git a/tests/tga/tga_read_rgb.png b/tests/tga/tga_read_rgb.png |
| new file mode 100644 |
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| diff --git a/tests/tga/tga_read_rgb.tga b/tests/tga/tga_read_rgb.tga |
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| zntzY?IclF~1)z(S(?_E{e>U+xocGkVirDA1zqJQA=ChN3KDzOHqxR`m0J^w<*>l{g |
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| z5BttRos|2|Cf<khp1M}?+Cv8mSnjO#eI(A;@rPf5)IC@J>GY(v)!K>yF(3xSfEW-1 |
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| pVn7Ut0Wly3rpJK2`Txh?|LN;LKmWt?-@f?SH@|xR>#u*F{Rp+*(8>S+ |
| |
| literal 0 |
| HcmV?d00001 |
| |
| diff --git a/tests/tga/tga_read_rgb_rle.tga b/tests/tga/tga_read_rgb_rle.tga |
| new file mode 100644 |
| index 0000000000000000000000000000000000000000..ce845ad0c3da65205af25854d64568b1cf0921e3 |
| GIT binary patch |
| literal 9987 |
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| ziiRRbk%9(oq!dtCIspYA&6UugGcC>X|IOQdZ+$+;#>5ek&eFVnJ3DVa{%>aX?a5Je |
| zF>-%5qwk}eQT$4wzvw%Lr!o5$L%T1%_;U0&GrMhYD|*=1u+QBMI7bBz5GWAXUI?5o |
| z4)=h152)YuP~W$``}B?1quuDQ!tKvI-d*GdmoNVj?N0AU(FV5-mWdwpH55x49>GD6 |
| z=%BBmXlU4mV>@qJ8fX!<cQoubnZc3TbVtK}?@1Y0!9an5mD0dE28xA&sM>=CL?@={ |
| z0-|RLqE&j)8olUxtrw;AqBVNamHEBs60Ks5R&l9p6>VC@T4)u!Z+{g<yLY2MYn^Q1 |
| zd9ELFE4tU$u)n0?3plJ1J?v}PZ)msyr`8V<5?$KSu-0S-M?&o#4QoBb4;grXfdT`M |
| zN=c*-Fi>D%n-xb5tYDzPz)HDn9RtO}K-2&bfLTDa$ReF=%5-@43+;@(Xqh_Lqg5;e |
| zg}THltzs{<ie37oodrXq8PIa=9O>E>BBIs4hP5RP*Wqxy6Qz9`Y(v8pI6+HwtX$ra |
| zy1k}`<+7Ep?x=h3^=RRT3_QR<fq_Rg0|yu=Ft9z}zzPNm46Kv})-g~l4EUq{0-{A0 |
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| ziIa1Wpa&iZ_r@?tJkJ5<afw}YS{54Q*|ADIR<0rq7ju0Ezq{lB$w1gObbznQZdZVC |
| zC{fEsk6_CHMd|PuWL7zD?Gbil$1PB(y&Zkn_I|ZCmODo!ml!;5_YN=f8&f%XLJ69i |
| zw+YreoXy~Iho>|{-W{nZBP!8&Q$t}P*I~(hRwZ6%$Lp+>-V88<W1vX?KTsG@4Mp7* |
| zP43JO--G~U!gJBc0<A+dG0?19zUEwf+}?LWRX6~j_TKxg%r*$-xiTt}Yajv!vcmP) |
| zqnTh(gvtWBmMHdlF_;5HXb)v)Q_z7o(;nJBIi5s&D7DGOkh+Oa-OSuJgOmf2R1I-V |
| zRL&L6j_DV<hr<B?9Mn_S!{H7Uhx4N2TcLZ}5FFv{ZJA>rG8_ARaUB|->lMt--ZnEI |
| zTJ7{U4;S{j2Ay9PTlySLkZpPkSyjD9xB@11Gqz?H&}bm6INZyXa|<usjtD%sjy+Z` |
| zO^{AKuWKHIUn2Ss=N8*9c5f<jyF%cp-^Zcb5%Fp{gGhMmxXnNb1>}y*$KYeSt=BT^ |
| z9)n8f69who6DC3I4i6#*smWsw#8aACPLFDXvaYploY`rTzv^v6%`=fZ=~tM<Gx7U2 |
| zGVu^u%W!94&zt&L+f3G5W^S(`9GhA$F^gxQaDFP%)PFP84q_$@7HzQb60>~+#d%*t |
| zf%)V_G>Dlk3}01X6V9YA0}KH#x+MuyPXYm7$4BlC*YhI}#g|)Uh0-v*i7ggcv&@^C |
| zjYO%ac80KpJfmhZkwXX$pH_*;t&cQIT_(xF6ht!Iic3UdT(%7ihfT|wtXWA&V1Sf; |
| zU3WEU`G(*m{rfc5Lu-SUf;0gW_gTQ5!wKEEk(Qj)=S2;}8FVa^9uYEg=U`?TJS&;e |
| zZ|IGrGhpnT4H$<N0L>R>%fn7eg+%K9in1ezX3K%Y`r6i<mRK!fyE0L3T&%#2e?}WI |
| zcSMQE6&v2hGddfHYR&MD28%5H1s1ZQZU%;X@Wf!oTq<&1f;-%4`%tL#0yUz{`gTy@ |
| x8%~Vp2_Ce5$E=Cyg!2^tf$X%_aF4$a-uv+CN7vrJ_RjTJKYsJtTUTF;{sH~|7$pDz |
| |
| literal 0 |
| HcmV?d00001 |
| |
| -- |
| 2.10.2 |
| |