diff options
Diffstat (limited to 'tools/aapt/Images.cpp')
| -rw-r--r-- | tools/aapt/Images.cpp | 1387 |
1 files changed, 1387 insertions, 0 deletions
diff --git a/tools/aapt/Images.cpp b/tools/aapt/Images.cpp new file mode 100644 index 0000000..b2cbf49 --- /dev/null +++ b/tools/aapt/Images.cpp @@ -0,0 +1,1387 @@ +// +// Copyright 2006 The Android Open Source Project +// +// Build resource files from raw assets. +// + +#define PNG_INTERNAL + +#include "Images.h" + +#include <androidfw/ResourceTypes.h> +#include <utils/ByteOrder.h> + +#include <png.h> +#include <zlib.h> + +#define NOISY(x) //x + +static void +png_write_aapt_file(png_structp png_ptr, png_bytep data, png_size_t length) +{ + AaptFile* aaptfile = (AaptFile*) png_get_io_ptr(png_ptr); + status_t err = aaptfile->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; + + // Layout padding, if relevant + bool haveLayoutBounds; + int32_t layoutBoundsLeft; + int32_t layoutBoundsTop; + int32_t layoutBoundsRight; + int32_t layoutBoundsBottom; + + 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_expand_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 * 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); +} + +#define COLOR_TRANSPARENT 0 +#define COLOR_WHITE 0xFFFFFFFF +#define COLOR_TICK 0xFF000000 +#define COLOR_LAYOUT_BOUNDS_TICK 0xFF0000FF + +enum { + TICK_TYPE_NONE, + TICK_TYPE_TICK, + TICK_TYPE_LAYOUT_BOUNDS, + TICK_TYPE_BOTH +}; + +static int tick_type(png_bytep p, bool transparent, const char** outError) +{ + png_uint_32 color = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); + + if (transparent) { + if (p[3] == 0) { + return TICK_TYPE_NONE; + } + if (color == COLOR_LAYOUT_BOUNDS_TICK) { + return TICK_TYPE_LAYOUT_BOUNDS; + } + if (color == COLOR_TICK) { + return TICK_TYPE_TICK; + } + + // Error cases + if (p[3] != 0xff) { + *outError = "Frame pixels must be either solid or transparent (not intermediate alphas)"; + return TICK_TYPE_NONE; + } + if (p[0] != 0 || p[1] != 0 || p[2] != 0) { + *outError = "Ticks in transparent frame must be black or red"; + } + return TICK_TYPE_TICK; + } + + if (p[3] != 0xFF) { + *outError = "White frame must be a solid color (no alpha)"; + } + if (color == COLOR_WHITE) { + return TICK_TYPE_NONE; + } + if (color == COLOR_TICK) { + return TICK_TYPE_TICK; + } + if (color == COLOR_LAYOUT_BOUNDS_TICK) { + return TICK_TYPE_LAYOUT_BOUNDS; + } + + if (p[0] != 0 || p[1] != 0 || p[2] != 0) { + *outError = "Ticks in white frame must be black or red"; + return TICK_TYPE_NONE; + } + return TICK_TYPE_TICK; +} + +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 (TICK_TYPE_TICK == tick_type(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 (TICK_TYPE_TICK == tick_type(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 status_t get_horizontal_layout_bounds_ticks( + png_bytep row, int width, bool transparent, bool required, + int32_t* outLeft, int32_t* outRight, const char** outError) +{ + int i; + *outLeft = *outRight = 0; + + // Look for left tick + if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + 4, transparent, outError)) { + // Starting with a layout padding tick + i = 1; + while (i < width - 1) { + (*outLeft)++; + i++; + int tick = tick_type(row + i * 4, transparent, outError); + if (tick != TICK_TYPE_LAYOUT_BOUNDS) { + break; + } + } + } + + // Look for right tick + if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(row + (width - 2) * 4, transparent, outError)) { + // Ending with a layout padding tick + i = width - 2; + while (i > 1) { + (*outRight)++; + i--; + int tick = tick_type(row+i*4, transparent, outError); + if (tick != TICK_TYPE_LAYOUT_BOUNDS) { + break; + } + } + } + + return NO_ERROR; +} + +static status_t get_vertical_layout_bounds_ticks( + png_bytepp rows, int offset, int height, bool transparent, bool required, + int32_t* outTop, int32_t* outBottom, const char** outError) +{ + int i; + *outTop = *outBottom = 0; + + // Look for top tick + if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[1] + offset, transparent, outError)) { + // Starting with a layout padding tick + i = 1; + while (i < height - 1) { + (*outTop)++; + i++; + int tick = tick_type(rows[i] + offset, transparent, outError); + if (tick != TICK_TYPE_LAYOUT_BOUNDS) { + break; + } + } + } + + // Look for bottom tick + if (TICK_TYPE_LAYOUT_BOUNDS == tick_type(rows[height - 2] + offset, transparent, outError)) { + // Ending with a layout padding tick + i = height - 2; + while (i > 1) { + (*outBottom)++; + i--; + int tick = tick_type(rows[i] + offset, transparent, outError); + if (tick != TICK_TYPE_LAYOUT_BOUNDS) { + break; + } + } + } + + 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; + + image->layoutBoundsLeft = image->layoutBoundsRight = + image->layoutBoundsTop = image->layoutBoundsBottom = 0; + + 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; + } + + // Find left and right of layout padding... + get_horizontal_layout_bounds_ticks(image->rows[H-1], W, transparent, false, + &image->layoutBoundsLeft, + &image->layoutBoundsRight, &errorMsg); + + get_vertical_layout_bounds_ticks(image->rows, (W-1)*4, H, transparent, false, + &image->layoutBoundsTop, + &image->layoutBoundsBottom, &errorMsg); + + image->haveLayoutBounds = image->layoutBoundsLeft != 0 + || image->layoutBoundsRight != 0 + || image->layoutBoundsTop != 0 + || image->layoutBoundsBottom != 0; + + if (image->haveLayoutBounds) { + NOISY(printf("layoutBounds=%d %d %d %d\n", image->layoutBoundsLeft, image->layoutBoundsTop, + image->layoutBoundsRight, image->layoutBoundsBottom)); + } + + // 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) * 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[2]; + unknowns[0].data = NULL; + unknowns[1].data = NULL; + + png_bytepp outRows = (png_bytepp) malloc((int) imageInfo.height * 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) { + int chunk_count = 1 + (imageInfo.haveLayoutBounds ? 1 : 0); + int p_index = imageInfo.haveLayoutBounds ? 1 : 0; + int b_index = 0; + png_byte *chunk_names = imageInfo.haveLayoutBounds + ? (png_byte*)"npLb\0npTc\0" + : (png_byte*)"npTc"; + NOISY(printf("Adding 9-patch info...\n")); + strcpy((char*)unknowns[p_index].name, "npTc"); + unknowns[p_index].data = (png_byte*)imageInfo.info9Patch.serialize(); + unknowns[p_index].size = imageInfo.info9Patch.serializedSize(); + // TODO: remove the check below when everything works + checkNinePatchSerialization(&imageInfo.info9Patch, unknowns[p_index].data); + + if (imageInfo.haveLayoutBounds) { + int chunk_size = sizeof(png_uint_32) * 4; + strcpy((char*)unknowns[b_index].name, "npLb"); + unknowns[b_index].data = (png_byte*) calloc(chunk_size, 1); + memcpy(unknowns[b_index].data, &imageInfo.layoutBoundsLeft, chunk_size); + unknowns[b_index].size = chunk_size; + } + + for (int i = 0; i < chunk_count; i++) { + unknowns[i].location = PNG_HAVE_PLTE; + } + png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, + chunk_names, chunk_count); + png_set_unknown_chunks(write_ptr, write_info, unknowns, chunk_count); +#if PNG_LIBPNG_VER < 10600 + /* Deal with unknown chunk location bug in 1.5.x and earlier */ + png_set_unknown_chunk_location(write_ptr, write_info, 0, PNG_HAVE_PLTE); + if (imageInfo.haveLayoutBounds) { + png_set_unknown_chunk_location(write_ptr, write_info, 1, PNG_HAVE_PLTE); + } +#endif + } + + + png_write_info(write_ptr, write_info); + + png_bytepp rows; + if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) { + if (color_type == PNG_COLOR_TYPE_RGB) { + 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); + free(unknowns[1].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(const 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()); + + if (bundle->getVerbose()) { + printf("Processing image: %s\n", printableName.string()); + } + + 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 preProcessImageToCache(const Bundle* bundle, const String8& source, const String8& dest) +{ + 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; + + if (bundle->getVerbose()) { + printf("Processing image to cache: %s => %s\n", source.string(), dest.string()); + } + + // Get a file handler to read from + fp = fopen(source.string(),"rb"); + if (fp == NULL) { + fprintf(stderr, "%s ERROR: Unable to open PNG file\n", source.string()); + return error; + } + + // Call libpng to get a struct to read image data into + read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + if (!read_ptr) { + fclose(fp); + png_destroy_read_struct(&read_ptr, &read_info,NULL); + return error; + } + + // Call libpng to get a struct to read image info into + read_info = png_create_info_struct(read_ptr); + if (!read_info) { + fclose(fp); + png_destroy_read_struct(&read_ptr, &read_info,NULL); + return error; + } + + // Set a jump point for libpng to long jump back to on error + if (setjmp(png_jmpbuf(read_ptr))) { + fclose(fp); + png_destroy_read_struct(&read_ptr, &read_info,NULL); + return error; + } + + // Set up libpng to read from our file. + png_init_io(read_ptr,fp); + + // Actually read data from the file + read_png(source.string(), read_ptr, read_info, &imageInfo); + + // We're done reading so we can clean up + // Find old file size before releasing handle + fseek(fp, 0, SEEK_END); + size_t oldSize = (size_t)ftell(fp); + fclose(fp); + png_destroy_read_struct(&read_ptr, &read_info,NULL); + + // Check to see if we're dealing with a 9-patch + // If we are, process appropriately + if (source.getBasePath().getPathExtension() == ".9") { + if (do_9patch(source.string(), &imageInfo) != NO_ERROR) { + return error; + } + } + + // Call libpng to create a structure to hold the processed image data + // that can be written to disk + write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + if (!write_ptr) { + png_destroy_write_struct(&write_ptr, &write_info); + return error; + } + + // Call libpng to create a structure to hold processed image info that can + // be written to disk + write_info = png_create_info_struct(write_ptr); + if (!write_info) { + png_destroy_write_struct(&write_ptr, &write_info); + return error; + } + + // Open up our destination file for writing + fp = fopen(dest.string(), "wb"); + if (!fp) { + fprintf(stderr, "%s ERROR: Unable to open PNG file\n", dest.string()); + png_destroy_write_struct(&write_ptr, &write_info); + return error; + } + + // Set up libpng to write to our file + png_init_io(write_ptr, fp); + + // Set up a jump for libpng to long jump back on on errors + if (setjmp(png_jmpbuf(write_ptr))) { + fclose(fp); + png_destroy_write_struct(&write_ptr, &write_info); + return error; + } + + // Actually write out to the new png + write_png(dest.string(), write_ptr, write_info, imageInfo, + bundle->getGrayscaleTolerance()); + + if (bundle->getVerbose()) { + // Find the size of our new file + FILE* reader = fopen(dest.string(), "rb"); + fseek(reader, 0, SEEK_END); + size_t newSize = (size_t)ftell(reader); + fclose(reader); + + float factor = ((float)newSize)/oldSize; + int percent = (int)(factor*100); + printf(" (processed image to cache entry %s: %d%% size of source)\n", + dest.string(), percent); + } + + //Clean up + fclose(fp); + png_destroy_write_struct(&write_ptr, &write_info); + + return NO_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; +} |