diff options
Diffstat (limited to 'src/gui/image/qpnghandler.cpp')
| -rw-r--r-- | src/gui/image/qpnghandler.cpp | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/src/gui/image/qpnghandler.cpp b/src/gui/image/qpnghandler.cpp index 7838b7df8e..3ee9e200de 100644 --- a/src/gui/image/qpnghandler.cpp +++ b/src/gui/image/qpnghandler.cpp @@ -1,5 +1,6 @@ /**************************************************************************** ** +** Copyright (C) 2013 Samuel Gaist <samuel.gaist@edeltech.ch> ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** @@ -280,6 +281,15 @@ void setup_qt(QImage& image, png_structp png_ptr, png_infop info_ptr, QSize scal image.setColorCount(2); image.setColor(1, qRgb(0,0,0)); image.setColor(0, qRgb(255,255,255)); + if (png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, &trans_color_p) && trans_color_p) { + const int g = trans_color_p->gray; + // the image has white in the first position of the color table, + // black in the second. g is 0 for black, 1 for white. + if (g == 0) + image.setColor(1, qRgba(0, 0, 0, 0)); + else if (g == 1) + image.setColor(0, qRgba(255, 255, 255, 0)); + } } else if (bit_depth == 16 && png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) { png_set_expand(png_ptr); png_set_strip_16(png_ptr); @@ -406,14 +416,14 @@ static void read_image_scaled(QImage *outImage, png_structp png_ptr, png_infop i QPngHandlerPrivate::AllocatedMemoryPointers &, QSize scaledSize) { - png_uint_32 width; - png_uint_32 height; - png_int_32 offset_x; - png_int_32 offset_y; + png_uint_32 width = 0; + png_uint_32 height = 0; + png_int_32 offset_x = 0; + png_int_32 offset_y = 0; - int bit_depth; - int color_type; - int unit_type; + int bit_depth = 0; + int color_type = 0; + int unit_type = PNG_OFFSET_PIXEL; png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, 0, 0, 0); png_get_oFFs(png_ptr, info_ptr, &offset_x, &offset_y, &unit_type); uchar *data = outImage->bits(); |