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Decompile fn_07871 (BitmapImage::DecodeJpeg)

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Batch #15786 by Yommy: 0 byte-identical, 1 confirmed by peer review.

- fn_07871 BitmapImage::DecodeJpeg: logic confirmed by peer review

Peer-reviewed-by: eAthena, Tanke
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
This commit is contained in:
ragnarok-clanker 2026-11-10 11:21:05 +00:00
commit 4ddd7f1c6f
1 changed files with 14 additions and 12 deletions
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26
Source/Resource/Bitmap/BitmapImageJpeg.cpp
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@ -11,16 +11,15 @@ bool BitmapImage::DecodeJpeg(const void* data, int bytes) {
return false;
}
properties.jpegBytes = const_cast<unsigned char*>(static_cast<const unsigned char*>(data));
properties.jpegSize = bytes;
properties.jpegBytes = const_cast<unsigned char*>(static_cast<const unsigned char*>(data));
unsigned char* source;
if (ijlRead(&properties, 1) == 0) {
this->width = properties.jpegWidth;
this->height = properties.jpegHeight;
const std::uint32_t count = static_cast<std::uint32_t>(this->width) * static_cast<std::uint32_t>(this->height);
source = static_cast<unsigned char*>(std::malloc(count * 3u));
this->pixels = static_cast<std::uint32_t*>(std::malloc(count > 0x3FFFFFFFu ? 0xFFFFFFFFu : count * 4u));
source = new unsigned char[properties.jpegHeight * properties.jpegWidth * 3];
this->pixels = new std::uint32_t[this->height * this->width];
properties.dibWidth = this->width;
properties.dibHeight = this->height;
properties.dibBytes = source;
@ -29,8 +28,8 @@ bool BitmapImage::DecodeJpeg(const void* data, int bytes) {
properties.dibPadding = 0;
if (ijlRead(&properties, 3) != 0) {
std::free(source);
std::free(this->pixels);
delete[] source;
delete[] this->pixels;
this->pixels = nullptr;
return false;
@ -42,19 +41,22 @@ bool BitmapImage::DecodeJpeg(const void* data, int bytes) {
ijlFree(&properties);
for (int y = 0; y < this->height; ++y) {
const unsigned char* input = source + 3u * (static_cast<std::uint32_t>(y) * this->width);
std::uint32_t* out = &this->pixels[this->width * y];
const unsigned char* input = &source[3 * this->width * y];
if (!input) {
return false;
}
for (int x = 0; x < this->width; ++x, input += 3) {
const unsigned blue = input[0], green = input[1], red = input[2];
this->pixels[static_cast<std::uint32_t>(y) * this->width + x] =
red >= 254 && green <= 3 && blue >= 254 ? 0x000A0A0Au : blue | (green << 8) | (red << 16) | 0xFF000000u;
for (int x = 0; x < this->width; ++x) {
const unsigned red = input[2];
const unsigned blue = input[0];
const unsigned green = input[1];
*out++ = red >= 254 && green <= 3 && blue >= 254 ? 0x000A0A0Au : (((((0xFFu << 8) + red) << 8) + green) << 8) + blue;
input += 3;
}
}
std::free(source);
delete[] source;
this->alpha = 0;
return true;
}