| // |
| // Copyright 2006 The Android Open Source Project |
| // |
| // Build resource files from raw assets. |
| // |
| |
| #define PNG_INTERNAL |
| |
| #include "Images.h" |
| |
| #include <utils/ResourceTypes.h> |
| #include <utils/ByteOrder.h> |
| |
| #include <png.h> |
| |
| #define NOISY(x) //x |
| |
| static void |
| png_write_aapt_file(png_structp png_ptr, png_bytep data, png_size_t length) |
| { |
| status_t err = ((AaptFile*)png_ptr->io_ptr)->writeData(data, length); |
| if (err != NO_ERROR) { |
| png_error(png_ptr, "Write Error"); |
| } |
| } |
| |
| |
| static void |
| png_flush_aapt_file(png_structp png_ptr) |
| { |
| } |
| |
| // This holds an image as 8bpp RGBA. |
| struct image_info |
| { |
| image_info() : rows(NULL), is9Patch(false), allocRows(NULL) { } |
| ~image_info() { |
| if (rows && rows != allocRows) { |
| free(rows); |
| } |
| if (allocRows) { |
| for (int i=0; i<(int)allocHeight; i++) { |
| free(allocRows[i]); |
| } |
| free(allocRows); |
| } |
| free(info9Patch.xDivs); |
| free(info9Patch.yDivs); |
| free(info9Patch.colors); |
| } |
| |
| png_uint_32 width; |
| png_uint_32 height; |
| png_bytepp rows; |
| |
| // 9-patch info. |
| bool is9Patch; |
| Res_png_9patch info9Patch; |
| |
| png_uint_32 allocHeight; |
| png_bytepp allocRows; |
| }; |
| |
| static void read_png(const char* imageName, |
| png_structp read_ptr, png_infop read_info, |
| image_info* outImageInfo) |
| { |
| int color_type; |
| int bit_depth, interlace_type, compression_type; |
| int i; |
| |
| png_read_info(read_ptr, read_info); |
| |
| png_get_IHDR(read_ptr, read_info, &outImageInfo->width, |
| &outImageInfo->height, &bit_depth, &color_type, |
| &interlace_type, &compression_type, NULL); |
| |
| //printf("Image %s:\n", imageName); |
| //printf("color_type=%d, bit_depth=%d, interlace_type=%d, compression_type=%d\n", |
| // color_type, bit_depth, interlace_type, compression_type); |
| |
| if (color_type == PNG_COLOR_TYPE_PALETTE) |
| png_set_palette_to_rgb(read_ptr); |
| |
| if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) |
| png_set_gray_1_2_4_to_8(read_ptr); |
| |
| if (png_get_valid(read_ptr, read_info, PNG_INFO_tRNS)) { |
| //printf("Has PNG_INFO_tRNS!\n"); |
| png_set_tRNS_to_alpha(read_ptr); |
| } |
| |
| if (bit_depth == 16) |
| png_set_strip_16(read_ptr); |
| |
| if ((color_type&PNG_COLOR_MASK_ALPHA) == 0) |
| png_set_add_alpha(read_ptr, 0xFF, PNG_FILLER_AFTER); |
| |
| if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) |
| png_set_gray_to_rgb(read_ptr); |
| |
| png_read_update_info(read_ptr, read_info); |
| |
| outImageInfo->rows = (png_bytepp)malloc( |
| outImageInfo->height * png_sizeof(png_bytep)); |
| outImageInfo->allocHeight = outImageInfo->height; |
| outImageInfo->allocRows = outImageInfo->rows; |
| |
| png_set_rows(read_ptr, read_info, outImageInfo->rows); |
| |
| for (i = 0; i < (int)outImageInfo->height; i++) |
| { |
| outImageInfo->rows[i] = (png_bytep) |
| malloc(png_get_rowbytes(read_ptr, read_info)); |
| } |
| |
| png_read_image(read_ptr, outImageInfo->rows); |
| |
| png_read_end(read_ptr, read_info); |
| |
| NOISY(printf("Image %s: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", |
| imageName, |
| (int)outImageInfo->width, (int)outImageInfo->height, |
| bit_depth, color_type, |
| interlace_type, compression_type)); |
| |
| png_get_IHDR(read_ptr, read_info, &outImageInfo->width, |
| &outImageInfo->height, &bit_depth, &color_type, |
| &interlace_type, &compression_type, NULL); |
| } |
| |
| static bool is_tick(png_bytep p, bool transparent, const char** outError) |
| { |
| if (transparent) { |
| if (p[3] == 0) { |
| return false; |
| } |
| if (p[3] != 0xff) { |
| *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; |
| return false; |
| } |
| if (p[0] != 0 || p[1] != 0 || p[2] != 0) { |
| *outError = "Ticks in transparent frame must be black"; |
| } |
| return true; |
| } |
| |
| if (p[3] != 0xFF) { |
| *outError = "White frame must be a solid color (no alpha)"; |
| } |
| if (p[0] == 0xFF && p[1] == 0xFF && p[2] == 0xFF) { |
| return false; |
| } |
| if (p[0] != 0 || p[1] != 0 || p[2] != 0) { |
| *outError = "Ticks in white frame must be black"; |
| return false; |
| } |
| return true; |
| } |
| |
| enum { |
| TICK_START, |
| TICK_INSIDE_1, |
| TICK_OUTSIDE_1 |
| }; |
| |
| static status_t get_horizontal_ticks( |
| png_bytep row, int width, bool transparent, bool required, |
| int32_t* outLeft, int32_t* outRight, const char** outError, |
| uint8_t* outDivs, bool multipleAllowed) |
| { |
| int i; |
| *outLeft = *outRight = -1; |
| int state = TICK_START; |
| bool found = false; |
| |
| for (i=1; i<width-1; i++) { |
| if (is_tick(row+i*4, transparent, outError)) { |
| if (state == TICK_START || |
| (state == TICK_OUTSIDE_1 && multipleAllowed)) { |
| *outLeft = i-1; |
| *outRight = width-2; |
| found = true; |
| if (outDivs != NULL) { |
| *outDivs += 2; |
| } |
| state = TICK_INSIDE_1; |
| } else if (state == TICK_OUTSIDE_1) { |
| *outError = "Can't have more than one marked region along edge"; |
| *outLeft = i; |
| return UNKNOWN_ERROR; |
| } |
| } else if (*outError == NULL) { |
| if (state == TICK_INSIDE_1) { |
| // We're done with this div. Move on to the next. |
| *outRight = i-1; |
| outRight += 2; |
| outLeft += 2; |
| state = TICK_OUTSIDE_1; |
| } |
| } else { |
| *outLeft = i; |
| return UNKNOWN_ERROR; |
| } |
| } |
| |
| if (required && !found) { |
| *outError = "No marked region found along edge"; |
| *outLeft = -1; |
| return UNKNOWN_ERROR; |
| } |
| |
| return NO_ERROR; |
| } |
| |
| static status_t get_vertical_ticks( |
| png_bytepp rows, int offset, int height, bool transparent, bool required, |
| int32_t* outTop, int32_t* outBottom, const char** outError, |
| uint8_t* outDivs, bool multipleAllowed) |
| { |
| int i; |
| *outTop = *outBottom = -1; |
| int state = TICK_START; |
| bool found = false; |
| |
| for (i=1; i<height-1; i++) { |
| if (is_tick(rows[i]+offset, transparent, outError)) { |
| if (state == TICK_START || |
| (state == TICK_OUTSIDE_1 && multipleAllowed)) { |
| *outTop = i-1; |
| *outBottom = height-2; |
| found = true; |
| if (outDivs != NULL) { |
| *outDivs += 2; |
| } |
| state = TICK_INSIDE_1; |
| } else if (state == TICK_OUTSIDE_1) { |
| *outError = "Can't have more than one marked region along edge"; |
| *outTop = i; |
| return UNKNOWN_ERROR; |
| } |
| } else if (*outError == NULL) { |
| if (state == TICK_INSIDE_1) { |
| // We're done with this div. Move on to the next. |
| *outBottom = i-1; |
| outTop += 2; |
| outBottom += 2; |
| state = TICK_OUTSIDE_1; |
| } |
| } else { |
| *outTop = i; |
| return UNKNOWN_ERROR; |
| } |
| } |
| |
| if (required && !found) { |
| *outError = "No marked region found along edge"; |
| *outTop = -1; |
| return UNKNOWN_ERROR; |
| } |
| |
| return NO_ERROR; |
| } |
| |
| static uint32_t get_color( |
| png_bytepp rows, int left, int top, int right, int bottom) |
| { |
| png_bytep color = rows[top] + left*4; |
| |
| if (left > right || top > bottom) { |
| return Res_png_9patch::TRANSPARENT_COLOR; |
| } |
| |
| while (top <= bottom) { |
| for (int i = left; i <= right; i++) { |
| png_bytep p = rows[top]+i*4; |
| if (color[3] == 0) { |
| if (p[3] != 0) { |
| return Res_png_9patch::NO_COLOR; |
| } |
| } else if (p[0] != color[0] || p[1] != color[1] |
| || p[2] != color[2] || p[3] != color[3]) { |
| return Res_png_9patch::NO_COLOR; |
| } |
| } |
| top++; |
| } |
| |
| if (color[3] == 0) { |
| return Res_png_9patch::TRANSPARENT_COLOR; |
| } |
| return (color[3]<<24) | (color[0]<<16) | (color[1]<<8) | color[2]; |
| } |
| |
| static void select_patch( |
| int which, int front, int back, int size, int* start, int* end) |
| { |
| switch (which) { |
| case 0: |
| *start = 0; |
| *end = front-1; |
| break; |
| case 1: |
| *start = front; |
| *end = back-1; |
| break; |
| case 2: |
| *start = back; |
| *end = size-1; |
| break; |
| } |
| } |
| |
| static uint32_t get_color(image_info* image, int hpatch, int vpatch) |
| { |
| int left, right, top, bottom; |
| select_patch( |
| hpatch, image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], |
| image->width, &left, &right); |
| select_patch( |
| vpatch, image->info9Patch.yDivs[0], image->info9Patch.yDivs[1], |
| image->height, &top, &bottom); |
| //printf("Selecting h=%d v=%d: (%d,%d)-(%d,%d)\n", |
| // hpatch, vpatch, left, top, right, bottom); |
| const uint32_t c = get_color(image->rows, left, top, right, bottom); |
| NOISY(printf("Color in (%d,%d)-(%d,%d): #%08x\n", left, top, right, bottom, c)); |
| return c; |
| } |
| |
| static status_t do_9patch(const char* imageName, image_info* image) |
| { |
| image->is9Patch = true; |
| |
| int W = image->width; |
| int H = image->height; |
| int i, j; |
| |
| int maxSizeXDivs = W * sizeof(int32_t); |
| int maxSizeYDivs = H * sizeof(int32_t); |
| int32_t* xDivs = (int32_t*) malloc(maxSizeXDivs); |
| int32_t* yDivs = (int32_t*) malloc(maxSizeYDivs); |
| uint8_t numXDivs = 0; |
| uint8_t numYDivs = 0; |
| int8_t numColors; |
| int numRows; |
| int numCols; |
| int top; |
| int left; |
| int right; |
| int bottom; |
| memset(xDivs, -1, maxSizeXDivs); |
| memset(yDivs, -1, maxSizeYDivs); |
| image->info9Patch.paddingLeft = image->info9Patch.paddingRight = |
| image->info9Patch.paddingTop = image->info9Patch.paddingBottom = -1; |
| |
| png_bytep p = image->rows[0]; |
| bool transparent = p[3] == 0; |
| bool hasColor = false; |
| |
| const char* errorMsg = NULL; |
| int errorPixel = -1; |
| const char* errorEdge = NULL; |
| |
| int colorIndex = 0; |
| |
| // Validate size... |
| if (W < 3 || H < 3) { |
| errorMsg = "Image must be at least 3x3 (1x1 without frame) pixels"; |
| goto getout; |
| } |
| |
| // Validate frame... |
| if (!transparent && |
| (p[0] != 0xFF || p[1] != 0xFF || p[2] != 0xFF || p[3] != 0xFF)) { |
| errorMsg = "Must have one-pixel frame that is either transparent or white"; |
| goto getout; |
| } |
| |
| // Find left and right of sizing areas... |
| if (get_horizontal_ticks(p, W, transparent, true, &xDivs[0], |
| &xDivs[1], &errorMsg, &numXDivs, true) != NO_ERROR) { |
| errorPixel = xDivs[0]; |
| errorEdge = "top"; |
| goto getout; |
| } |
| |
| // Find top and bottom of sizing areas... |
| if (get_vertical_ticks(image->rows, 0, H, transparent, true, &yDivs[0], |
| &yDivs[1], &errorMsg, &numYDivs, true) != NO_ERROR) { |
| errorPixel = yDivs[0]; |
| errorEdge = "left"; |
| goto getout; |
| } |
| |
| // Find left and right of padding area... |
| if (get_horizontal_ticks(image->rows[H-1], W, transparent, false, &image->info9Patch.paddingLeft, |
| &image->info9Patch.paddingRight, &errorMsg, NULL, false) != NO_ERROR) { |
| errorPixel = image->info9Patch.paddingLeft; |
| errorEdge = "bottom"; |
| goto getout; |
| } |
| |
| // Find top and bottom of padding area... |
| if (get_vertical_ticks(image->rows, (W-1)*4, H, transparent, false, &image->info9Patch.paddingTop, |
| &image->info9Patch.paddingBottom, &errorMsg, NULL, false) != NO_ERROR) { |
| errorPixel = image->info9Patch.paddingTop; |
| errorEdge = "right"; |
| goto getout; |
| } |
| |
| // Copy patch data into image |
| image->info9Patch.numXDivs = numXDivs; |
| image->info9Patch.numYDivs = numYDivs; |
| image->info9Patch.xDivs = xDivs; |
| image->info9Patch.yDivs = yDivs; |
| |
| // If padding is not yet specified, take values from size. |
| if (image->info9Patch.paddingLeft < 0) { |
| image->info9Patch.paddingLeft = xDivs[0]; |
| image->info9Patch.paddingRight = W - 2 - xDivs[1]; |
| } else { |
| // Adjust value to be correct! |
| image->info9Patch.paddingRight = W - 2 - image->info9Patch.paddingRight; |
| } |
| if (image->info9Patch.paddingTop < 0) { |
| image->info9Patch.paddingTop = yDivs[0]; |
| image->info9Patch.paddingBottom = H - 2 - yDivs[1]; |
| } else { |
| // Adjust value to be correct! |
| image->info9Patch.paddingBottom = H - 2 - image->info9Patch.paddingBottom; |
| } |
| |
| NOISY(printf("Size ticks for %s: x0=%d, x1=%d, y0=%d, y1=%d\n", imageName, |
| image->info9Patch.xDivs[0], image->info9Patch.xDivs[1], |
| image->info9Patch.yDivs[0], image->info9Patch.yDivs[1])); |
| NOISY(printf("padding ticks for %s: l=%d, r=%d, t=%d, b=%d\n", imageName, |
| image->info9Patch.paddingLeft, image->info9Patch.paddingRight, |
| image->info9Patch.paddingTop, image->info9Patch.paddingBottom)); |
| |
| // Remove frame from image. |
| image->rows = (png_bytepp)malloc((H-2) * png_sizeof(png_bytep)); |
| for (i=0; i<(H-2); i++) { |
| image->rows[i] = image->allocRows[i+1]; |
| memmove(image->rows[i], image->rows[i]+4, (W-2)*4); |
| } |
| image->width -= 2; |
| W = image->width; |
| image->height -= 2; |
| H = image->height; |
| |
| // Figure out the number of rows and columns in the N-patch |
| numCols = numXDivs + 1; |
| if (xDivs[0] == 0) { // Column 1 is strechable |
| numCols--; |
| } |
| if (xDivs[numXDivs - 1] == W) { |
| numCols--; |
| } |
| numRows = numYDivs + 1; |
| if (yDivs[0] == 0) { // Row 1 is strechable |
| numRows--; |
| } |
| if (yDivs[numYDivs - 1] == H) { |
| numRows--; |
| } |
| |
| // Make sure the amount of rows and columns will fit in the number of |
| // colors we can use in the 9-patch format. |
| if (numRows * numCols > 0x7F) { |
| errorMsg = "Too many rows and columns in 9-patch perimeter"; |
| goto getout; |
| } |
| |
| numColors = numRows * numCols; |
| image->info9Patch.numColors = numColors; |
| image->info9Patch.colors = (uint32_t*)malloc(numColors * sizeof(uint32_t)); |
| |
| // Fill in color information for each patch. |
| |
| uint32_t c; |
| top = 0; |
| |
| // The first row always starts with the top being at y=0 and the bottom |
| // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case |
| // the first row is stretchable along the Y axis, otherwise it is fixed. |
| // The last row always ends with the bottom being bitmap.height and the top |
| // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or |
| // yDivs[numYDivs-1]. In the former case the last row is stretchable along |
| // the Y axis, otherwise it is fixed. |
| // |
| // The first and last columns are similarly treated with respect to the X |
| // axis. |
| // |
| // The above is to help explain some of the special casing that goes on the |
| // code below. |
| |
| // The initial yDiv and whether the first row is considered stretchable or |
| // not depends on whether yDiv[0] was zero or not. |
| for (j = (yDivs[0] == 0 ? 1 : 0); |
| j <= numYDivs && top < H; |
| j++) { |
| if (j == numYDivs) { |
| bottom = H; |
| } else { |
| bottom = yDivs[j]; |
| } |
| left = 0; |
| // The initial xDiv and whether the first column is considered |
| // stretchable or not depends on whether xDiv[0] was zero or not. |
| for (i = xDivs[0] == 0 ? 1 : 0; |
| i <= numXDivs && left < W; |
| i++) { |
| if (i == numXDivs) { |
| right = W; |
| } else { |
| right = xDivs[i]; |
| } |
| c = get_color(image->rows, left, top, right - 1, bottom - 1); |
| image->info9Patch.colors[colorIndex++] = c; |
| NOISY(if (c != Res_png_9patch::NO_COLOR) hasColor = true); |
| left = right; |
| } |
| top = bottom; |
| } |
| |
| assert(colorIndex == numColors); |
| |
| for (i=0; i<numColors; i++) { |
| if (hasColor) { |
| if (i == 0) printf("Colors in %s:\n ", imageName); |
| printf(" #%08x", image->info9Patch.colors[i]); |
| if (i == numColors - 1) printf("\n"); |
| } |
| } |
| |
| image->is9Patch = true; |
| image->info9Patch.deviceToFile(); |
| |
| getout: |
| if (errorMsg) { |
| fprintf(stderr, |
| "ERROR: 9-patch image %s malformed.\n" |
| " %s.\n", imageName, errorMsg); |
| if (errorEdge != NULL) { |
| if (errorPixel >= 0) { |
| fprintf(stderr, |
| " Found at pixel #%d along %s edge.\n", errorPixel, errorEdge); |
| } else { |
| fprintf(stderr, |
| " Found along %s edge.\n", errorEdge); |
| } |
| } |
| return UNKNOWN_ERROR; |
| } |
| return NO_ERROR; |
| } |
| |
| static void checkNinePatchSerialization(Res_png_9patch* inPatch, void * data) |
| { |
| if (sizeof(void*) != sizeof(int32_t)) { |
| // can't deserialize on a non-32 bit system |
| return; |
| } |
| size_t patchSize = inPatch->serializedSize(); |
| void * newData = malloc(patchSize); |
| memcpy(newData, data, patchSize); |
| Res_png_9patch* outPatch = inPatch->deserialize(newData); |
| // deserialization is done in place, so outPatch == newData |
| assert(outPatch == newData); |
| assert(outPatch->numXDivs == inPatch->numXDivs); |
| assert(outPatch->numYDivs == inPatch->numYDivs); |
| assert(outPatch->paddingLeft == inPatch->paddingLeft); |
| assert(outPatch->paddingRight == inPatch->paddingRight); |
| assert(outPatch->paddingTop == inPatch->paddingTop); |
| assert(outPatch->paddingBottom == inPatch->paddingBottom); |
| for (int i = 0; i < outPatch->numXDivs; i++) { |
| assert(outPatch->xDivs[i] == inPatch->xDivs[i]); |
| } |
| for (int i = 0; i < outPatch->numYDivs; i++) { |
| assert(outPatch->yDivs[i] == inPatch->yDivs[i]); |
| } |
| for (int i = 0; i < outPatch->numColors; i++) { |
| assert(outPatch->colors[i] == inPatch->colors[i]); |
| } |
| free(newData); |
| } |
| |
| static bool patch_equals(Res_png_9patch& patch1, Res_png_9patch& patch2) { |
| if (!(patch1.numXDivs == patch2.numXDivs && |
| patch1.numYDivs == patch2.numYDivs && |
| patch1.numColors == patch2.numColors && |
| patch1.paddingLeft == patch2.paddingLeft && |
| patch1.paddingRight == patch2.paddingRight && |
| patch1.paddingTop == patch2.paddingTop && |
| patch1.paddingBottom == patch2.paddingBottom)) { |
| return false; |
| } |
| for (int i = 0; i < patch1.numColors; i++) { |
| if (patch1.colors[i] != patch2.colors[i]) { |
| return false; |
| } |
| } |
| for (int i = 0; i < patch1.numXDivs; i++) { |
| if (patch1.xDivs[i] != patch2.xDivs[i]) { |
| return false; |
| } |
| } |
| for (int i = 0; i < patch1.numYDivs; i++) { |
| if (patch1.yDivs[i] != patch2.yDivs[i]) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| static void dump_image(int w, int h, png_bytepp rows, int color_type) |
| { |
| int i, j, rr, gg, bb, aa; |
| |
| int bpp; |
| if (color_type == PNG_COLOR_TYPE_PALETTE || color_type == PNG_COLOR_TYPE_GRAY) { |
| bpp = 1; |
| } else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
| bpp = 2; |
| } else if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| // We use a padding byte even when there is no alpha |
| bpp = 4; |
| } else { |
| printf("Unknown color type %d.\n", color_type); |
| } |
| |
| for (j = 0; j < h; j++) { |
| png_bytep row = rows[j]; |
| for (i = 0; i < w; i++) { |
| rr = row[0]; |
| gg = row[1]; |
| bb = row[2]; |
| aa = row[3]; |
| row += bpp; |
| |
| if (i == 0) { |
| printf("Row %d:", j); |
| } |
| switch (bpp) { |
| case 1: |
| printf(" (%d)", rr); |
| break; |
| case 2: |
| printf(" (%d %d", rr, gg); |
| break; |
| case 3: |
| printf(" (%d %d %d)", rr, gg, bb); |
| break; |
| case 4: |
| printf(" (%d %d %d %d)", rr, gg, bb, aa); |
| break; |
| } |
| if (i == (w - 1)) { |
| NOISY(printf("\n")); |
| } |
| } |
| } |
| } |
| |
| #define MAX(a,b) ((a)>(b)?(a):(b)) |
| #define ABS(a) ((a)<0?-(a):(a)) |
| |
| static void analyze_image(const char *imageName, image_info &imageInfo, int grayscaleTolerance, |
| png_colorp rgbPalette, png_bytep alphaPalette, |
| int *paletteEntries, bool *hasTransparency, int *colorType, |
| png_bytepp outRows) |
| { |
| int w = imageInfo.width; |
| int h = imageInfo.height; |
| int i, j, rr, gg, bb, aa, idx; |
| uint32_t colors[256], col; |
| int num_colors = 0; |
| int maxGrayDeviation = 0; |
| |
| bool isOpaque = true; |
| bool isPalette = true; |
| bool isGrayscale = true; |
| |
| // Scan the entire image and determine if: |
| // 1. Every pixel has R == G == B (grayscale) |
| // 2. Every pixel has A == 255 (opaque) |
| // 3. There are no more than 256 distinct RGBA colors |
| |
| // NOISY(printf("Initial image data:\n")); |
| // dump_image(w, h, imageInfo.rows, PNG_COLOR_TYPE_RGB_ALPHA); |
| |
| for (j = 0; j < h; j++) { |
| png_bytep row = imageInfo.rows[j]; |
| png_bytep out = outRows[j]; |
| for (i = 0; i < w; i++) { |
| rr = *row++; |
| gg = *row++; |
| bb = *row++; |
| aa = *row++; |
| |
| int odev = maxGrayDeviation; |
| maxGrayDeviation = MAX(ABS(rr - gg), maxGrayDeviation); |
| maxGrayDeviation = MAX(ABS(gg - bb), maxGrayDeviation); |
| maxGrayDeviation = MAX(ABS(bb - rr), maxGrayDeviation); |
| if (maxGrayDeviation > odev) { |
| NOISY(printf("New max dev. = %d at pixel (%d, %d) = (%d %d %d %d)\n", |
| maxGrayDeviation, i, j, rr, gg, bb, aa)); |
| } |
| |
| // Check if image is really grayscale |
| if (isGrayscale) { |
| if (rr != gg || rr != bb) { |
| NOISY(printf("Found a non-gray pixel at %d, %d = (%d %d %d %d)\n", |
| i, j, rr, gg, bb, aa)); |
| isGrayscale = false; |
| } |
| } |
| |
| // Check if image is really opaque |
| if (isOpaque) { |
| if (aa != 0xff) { |
| NOISY(printf("Found a non-opaque pixel at %d, %d = (%d %d %d %d)\n", |
| i, j, rr, gg, bb, aa)); |
| isOpaque = false; |
| } |
| } |
| |
| // Check if image is really <= 256 colors |
| if (isPalette) { |
| col = (uint32_t) ((rr << 24) | (gg << 16) | (bb << 8) | aa); |
| bool match = false; |
| for (idx = 0; idx < num_colors; idx++) { |
| if (colors[idx] == col) { |
| match = true; |
| break; |
| } |
| } |
| |
| // Write the palette index for the pixel to outRows optimistically |
| // We might overwrite it later if we decide to encode as gray or |
| // gray + alpha |
| *out++ = idx; |
| if (!match) { |
| if (num_colors == 256) { |
| NOISY(printf("Found 257th color at %d, %d\n", i, j)); |
| isPalette = false; |
| } else { |
| colors[num_colors++] = col; |
| } |
| } |
| } |
| } |
| } |
| |
| *paletteEntries = 0; |
| *hasTransparency = !isOpaque; |
| int bpp = isOpaque ? 3 : 4; |
| int paletteSize = w * h + bpp * num_colors; |
| |
| NOISY(printf("isGrayscale = %s\n", isGrayscale ? "true" : "false")); |
| NOISY(printf("isOpaque = %s\n", isOpaque ? "true" : "false")); |
| NOISY(printf("isPalette = %s\n", isPalette ? "true" : "false")); |
| NOISY(printf("Size w/ palette = %d, gray+alpha = %d, rgb(a) = %d\n", |
| paletteSize, 2 * w * h, bpp * w * h)); |
| NOISY(printf("Max gray deviation = %d, tolerance = %d\n", maxGrayDeviation, grayscaleTolerance)); |
| |
| // Choose the best color type for the image. |
| // 1. Opaque gray - use COLOR_TYPE_GRAY at 1 byte/pixel |
| // 2. Gray + alpha - use COLOR_TYPE_PALETTE if the number of distinct combinations |
| // is sufficiently small, otherwise use COLOR_TYPE_GRAY_ALPHA |
| // 3. RGB(A) - use COLOR_TYPE_PALETTE if the number of distinct colors is sufficiently |
| // small, otherwise use COLOR_TYPE_RGB{_ALPHA} |
| if (isGrayscale) { |
| if (isOpaque) { |
| *colorType = PNG_COLOR_TYPE_GRAY; // 1 byte/pixel |
| } else { |
| // Use a simple heuristic to determine whether using a palette will |
| // save space versus using gray + alpha for each pixel. |
| // This doesn't take into account chunk overhead, filtering, LZ |
| // compression, etc. |
| if (isPalette && (paletteSize < 2 * w * h)) { |
| *colorType = PNG_COLOR_TYPE_PALETTE; // 1 byte/pixel + 4 bytes/color |
| } else { |
| *colorType = PNG_COLOR_TYPE_GRAY_ALPHA; // 2 bytes per pixel |
| } |
| } |
| } else if (isPalette && (paletteSize < bpp * w * h)) { |
| *colorType = PNG_COLOR_TYPE_PALETTE; |
| } else { |
| if (maxGrayDeviation <= grayscaleTolerance) { |
| printf("%s: forcing image to gray (max deviation = %d)\n", imageName, maxGrayDeviation); |
| *colorType = isOpaque ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_GRAY_ALPHA; |
| } else { |
| *colorType = isOpaque ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; |
| } |
| } |
| |
| // Perform postprocessing of the image or palette data based on the final |
| // color type chosen |
| |
| if (*colorType == PNG_COLOR_TYPE_PALETTE) { |
| // Create separate RGB and Alpha palettes and set the number of colors |
| *paletteEntries = num_colors; |
| |
| // Create the RGB and alpha palettes |
| for (int idx = 0; idx < num_colors; idx++) { |
| col = colors[idx]; |
| rgbPalette[idx].red = (png_byte) ((col >> 24) & 0xff); |
| rgbPalette[idx].green = (png_byte) ((col >> 16) & 0xff); |
| rgbPalette[idx].blue = (png_byte) ((col >> 8) & 0xff); |
| alphaPalette[idx] = (png_byte) (col & 0xff); |
| } |
| } else if (*colorType == PNG_COLOR_TYPE_GRAY || *colorType == PNG_COLOR_TYPE_GRAY_ALPHA) { |
| // If the image is gray or gray + alpha, compact the pixels into outRows |
| for (j = 0; j < h; j++) { |
| png_bytep row = imageInfo.rows[j]; |
| png_bytep out = outRows[j]; |
| for (i = 0; i < w; i++) { |
| rr = *row++; |
| gg = *row++; |
| bb = *row++; |
| aa = *row++; |
| |
| if (isGrayscale) { |
| *out++ = rr; |
| } else { |
| *out++ = (png_byte) (rr * 0.2126f + gg * 0.7152f + bb * 0.0722f); |
| } |
| if (!isOpaque) { |
| *out++ = aa; |
| } |
| } |
| } |
| } |
| } |
| |
| |
| static void write_png(const char* imageName, |
| png_structp write_ptr, png_infop write_info, |
| image_info& imageInfo, int grayscaleTolerance) |
| { |
| bool optimize = true; |
| png_uint_32 width, height; |
| int color_type; |
| int bit_depth, interlace_type, compression_type; |
| int i; |
| |
| png_unknown_chunk unknowns[1]; |
| unknowns[0].data = NULL; |
| |
| png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * png_sizeof(png_bytep)); |
| if (outRows == (png_bytepp) 0) { |
| printf("Can't allocate output buffer!\n"); |
| exit(1); |
| } |
| for (i = 0; i < (int) imageInfo.height; i++) { |
| outRows[i] = (png_bytep) malloc(2 * (int) imageInfo.width); |
| if (outRows[i] == (png_bytep) 0) { |
| printf("Can't allocate output buffer!\n"); |
| exit(1); |
| } |
| } |
| |
| png_set_compression_level(write_ptr, Z_BEST_COMPRESSION); |
| |
| NOISY(printf("Writing image %s: w = %d, h = %d\n", imageName, |
| (int) imageInfo.width, (int) imageInfo.height)); |
| |
| png_color rgbPalette[256]; |
| png_byte alphaPalette[256]; |
| bool hasTransparency; |
| int paletteEntries; |
| |
| analyze_image(imageName, imageInfo, grayscaleTolerance, rgbPalette, alphaPalette, |
| &paletteEntries, &hasTransparency, &color_type, outRows); |
| |
| // If the image is a 9-patch, we need to preserve it as a ARGB file to make |
| // sure the pixels will not be pre-dithered/clamped until we decide they are |
| if (imageInfo.is9Patch && (color_type == PNG_COLOR_TYPE_RGB || |
| color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)) { |
| color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
| } |
| |
| switch (color_type) { |
| case PNG_COLOR_TYPE_PALETTE: |
| NOISY(printf("Image %s has %d colors%s, using PNG_COLOR_TYPE_PALETTE\n", |
| imageName, paletteEntries, |
| hasTransparency ? " (with alpha)" : "")); |
| break; |
| case PNG_COLOR_TYPE_GRAY: |
| NOISY(printf("Image %s is opaque gray, using PNG_COLOR_TYPE_GRAY\n", imageName)); |
| break; |
| case PNG_COLOR_TYPE_GRAY_ALPHA: |
| NOISY(printf("Image %s is gray + alpha, using PNG_COLOR_TYPE_GRAY_ALPHA\n", imageName)); |
| break; |
| case PNG_COLOR_TYPE_RGB: |
| NOISY(printf("Image %s is opaque RGB, using PNG_COLOR_TYPE_RGB\n", imageName)); |
| break; |
| case PNG_COLOR_TYPE_RGB_ALPHA: |
| NOISY(printf("Image %s is RGB + alpha, using PNG_COLOR_TYPE_RGB_ALPHA\n", imageName)); |
| break; |
| } |
| |
| png_set_IHDR(write_ptr, write_info, imageInfo.width, imageInfo.height, |
| 8, color_type, PNG_INTERLACE_NONE, |
| PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); |
| |
| if (color_type == PNG_COLOR_TYPE_PALETTE) { |
| png_set_PLTE(write_ptr, write_info, rgbPalette, paletteEntries); |
| if (hasTransparency) { |
| png_set_tRNS(write_ptr, write_info, alphaPalette, paletteEntries, (png_color_16p) 0); |
| } |
| png_set_filter(write_ptr, 0, PNG_NO_FILTERS); |
| } else { |
| png_set_filter(write_ptr, 0, PNG_ALL_FILTERS); |
| } |
| |
| if (imageInfo.is9Patch) { |
| NOISY(printf("Adding 9-patch info...\n")); |
| strcpy((char*)unknowns[0].name, "npTc"); |
| unknowns[0].data = (png_byte*)imageInfo.info9Patch.serialize(); |
| unknowns[0].size = imageInfo.info9Patch.serializedSize(); |
| // TODO: remove the check below when everything works |
| checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[0].data); |
| png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, |
| (png_byte*)"npTc", 1); |
| png_set_unknown_chunks(write_ptr, write_info, unknowns, 1); |
| // XXX I can't get this to work without forcibly changing |
| // the location to what I want... which apparently is supposed |
| // to be a private API, but everything else I have tried results |
| // in the location being set to what I -last- wrote so I never |
| // get written. :p |
| png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); |
| } |
| |
| png_write_info(write_ptr, write_info); |
| |
| png_bytepp rows; |
| if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| png_set_filler(write_ptr, 0, PNG_FILLER_AFTER); |
| rows = imageInfo.rows; |
| } else { |
| rows = outRows; |
| } |
| png_write_image(write_ptr, rows); |
| |
| // NOISY(printf("Final image data:\n")); |
| // dump_image(imageInfo.width, imageInfo.height, rows, color_type); |
| |
| png_write_end(write_ptr, write_info); |
| |
| for (i = 0; i < (int) imageInfo.height; i++) { |
| free(outRows[i]); |
| } |
| free(outRows); |
| free(unknowns[0].data); |
| |
| png_get_IHDR(write_ptr, write_info, &width, &height, |
| &bit_depth, &color_type, &interlace_type, |
| &compression_type, NULL); |
| |
| NOISY(printf("Image written: w=%d, h=%d, d=%d, colors=%d, inter=%d, comp=%d\n", |
| (int)width, (int)height, bit_depth, color_type, interlace_type, |
| compression_type)); |
| } |
| |
| status_t preProcessImage(Bundle* bundle, const sp<AaptAssets>& assets, |
| const sp<AaptFile>& file, String8* outNewLeafName) |
| { |
| String8 ext(file->getPath().getPathExtension()); |
| |
| // We currently only process PNG images. |
| if (strcmp(ext.string(), ".png") != 0) { |
| return NO_ERROR; |
| } |
| |
| // Example of renaming a file: |
| //*outNewLeafName = file->getPath().getBasePath().getFileName(); |
| //outNewLeafName->append(".nupng"); |
| |
| String8 printableName(file->getPrintableSource()); |
| |
| png_structp read_ptr = NULL; |
| png_infop read_info = NULL; |
| FILE* fp; |
| |
| image_info imageInfo; |
| |
| png_structp write_ptr = NULL; |
| png_infop write_info = NULL; |
| |
| status_t error = UNKNOWN_ERROR; |
| |
| const size_t nameLen = file->getPath().length(); |
| |
| fp = fopen(file->getSourceFile().string(), "rb"); |
| if (fp == NULL) { |
| fprintf(stderr, "%s: ERROR: Unable to open PNG file\n", printableName.string()); |
| goto bail; |
| } |
| |
| read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, |
| (png_error_ptr)NULL); |
| if (!read_ptr) { |
| goto bail; |
| } |
| |
| read_info = png_create_info_struct(read_ptr); |
| if (!read_info) { |
| goto bail; |
| } |
| |
| if (setjmp(png_jmpbuf(read_ptr))) { |
| goto bail; |
| } |
| |
| png_init_io(read_ptr, fp); |
| |
| read_png(printableName.string(), read_ptr, read_info, &imageInfo); |
| |
| if (nameLen > 6) { |
| const char* name = file->getPath().string(); |
| if (name[nameLen-5] == '9' && name[nameLen-6] == '.') { |
| if (do_9patch(printableName.string(), &imageInfo) != NO_ERROR) { |
| goto bail; |
| } |
| } |
| } |
| |
| write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, (png_error_ptr)NULL, |
| (png_error_ptr)NULL); |
| if (!write_ptr) |
| { |
| goto bail; |
| } |
| |
| write_info = png_create_info_struct(write_ptr); |
| if (!write_info) |
| { |
| goto bail; |
| } |
| |
| png_set_write_fn(write_ptr, (void*)file.get(), |
| png_write_aapt_file, png_flush_aapt_file); |
| |
| if (setjmp(png_jmpbuf(write_ptr))) |
| { |
| goto bail; |
| } |
| |
| write_png(printableName.string(), write_ptr, write_info, imageInfo, |
| bundle->getGrayscaleTolerance()); |
| |
| error = NO_ERROR; |
| |
| if (bundle->getVerbose()) { |
| fseek(fp, 0, SEEK_END); |
| size_t oldSize = (size_t)ftell(fp); |
| size_t newSize = file->getSize(); |
| float factor = ((float)newSize)/oldSize; |
| int percent = (int)(factor*100); |
| printf(" (processed image %s: %d%% size of source)\n", printableName.string(), percent); |
| } |
| |
| bail: |
| if (read_ptr) { |
| png_destroy_read_struct(&read_ptr, &read_info, (png_infopp)NULL); |
| } |
| if (fp) { |
| fclose(fp); |
| } |
| if (write_ptr) { |
| png_destroy_write_struct(&write_ptr, &write_info); |
| } |
| |
| if (error != NO_ERROR) { |
| fprintf(stderr, "ERROR: Failure processing PNG image %s\n", |
| file->getPrintableSource().string()); |
| } |
| return error; |
| } |
| |
| |
| |
| status_t postProcessImage(const sp<AaptAssets>& assets, |
| ResourceTable* table, const sp<AaptFile>& file) |
| { |
| String8 ext(file->getPath().getPathExtension()); |
| |
| // At this point, now that we have all the resource data, all we need to |
| // do is compile XML files. |
| if (strcmp(ext.string(), ".xml") == 0) { |
| return compileXmlFile(assets, file, table); |
| } |
| |
| return NO_ERROR; |
| } |