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image_enc,WebPWritePNG: move locals after setjmp

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this quiets a -Wclobbered warning on const has_alpha under gcc-7 and
brings the variables closer to their first use.

Change-Id: I8a24f275b7ff34a94d47b576bcf276dbedac2121
This commit is contained in:
James Zern 2018-03-08 22:58:11 -08:00
parent 74e82ec64a
commit b2db361ca6
1 changed files with 17 additions and 14 deletions
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31
imageio/image_enc.c
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@ -158,14 +158,8 @@ static void PNGAPI PNGErrorFunction(png_structp png, png_const_charp dummy) {
}
int WebPWritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
png_bytep row = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
volatile png_structp png;
volatile png_infop info;
png_uint_32 y;
if (out_file == NULL || buffer == NULL) return 0;
@ -184,14 +178,23 @@ int WebPWritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
return 0;
}
png_init_io(png, out_file);
png_set_IHDR(png, info, width, height, 8,
has_alpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info(png, info);
for (y = 0; y < height; ++y) {
png_write_rows(png, &row, 1);
row += stride;
{
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
png_bytep row = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
uint32_t y;
png_set_IHDR(png, info, width, height, 8,
has_alpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info(png, info);
for (y = 0; y < height; ++y) {
png_write_rows(png, &row, 1);
row += stride;
}
}
png_write_end(png, info);
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);