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-rw-r--r--image/bmp.cpp55
-rw-r--r--image/bmp.h9
2 files changed, 64 insertions, 0 deletions
diff --git a/image/bmp.cpp b/image/bmp.cpp
index 28eb049035..ce2b099797 100644
--- a/image/bmp.cpp
+++ b/image/bmp.cpp
@@ -132,4 +132,59 @@ bool BitmapDecoder::loadStream(Common::SeekableReadStream &stream) {
return true;
}
+bool writeBMP(Common::WriteStream &out, const Graphics::Surface &input, const bool bottomUp) {
+ const Graphics::PixelFormat requiredFormat_3byte(3, 8, 8, 8, 0, 0, 8, 16, 0);
+
+ Graphics::Surface *tmp = NULL;
+ const Graphics::Surface *surface;
+
+ if (input.format == requiredFormat_3byte) {
+ surface = &input;
+ } else {
+ surface = tmp = input.convertTo(requiredFormat_3byte);
+ }
+
+ int dstPitch = surface->w * 3;
+ int extraDataLength = (dstPitch % 4) ? 4 - (dstPitch % 4) : 0;
+ int padding = 0;
+
+ out.writeByte('B');
+ out.writeByte('M');
+ out.writeUint32LE(surface->h * dstPitch + 54);
+ out.writeUint32LE(0);
+ out.writeUint32LE(54);
+ out.writeUint32LE(40);
+ out.writeUint32LE(surface->w);
+ out.writeUint32LE(surface->h);
+ out.writeUint16LE(1);
+ out.writeUint16LE(24);
+ out.writeUint32LE(0);
+ out.writeUint32LE(0);
+ out.writeUint32LE(0);
+ out.writeUint32LE(0);
+ out.writeUint32LE(0);
+ out.writeUint32LE(0);
+
+
+ if (bottomUp) {
+ for (uint y = 0; y < surface->h; ++y) {
+ out.write((const void *)surface->getBasePtr(0, y), dstPitch);
+ out.write(&padding, extraDataLength);
+ }
+ } else {
+ for (uint y = surface->h; y-- > 0;) {
+ out.write((const void *)surface->getBasePtr(0, y), dstPitch);
+ out.write(&padding, extraDataLength);
+ }
+ }
+
+ // free tmp surface
+ if (tmp) {
+ tmp->free();
+ delete tmp;
+ }
+
+ return true;
+}
+
} // End of namespace Image
diff --git a/image/bmp.h b/image/bmp.h
index b482cc674b..a23f1e0978 100644
--- a/image/bmp.h
+++ b/image/bmp.h
@@ -37,6 +37,7 @@
namespace Common {
class SeekableReadStream;
+class WriteStream;
}
namespace Graphics {
@@ -66,6 +67,14 @@ private:
uint16 _paletteColorCount;
};
+/**
+ * Outputs an uncompressed BMP stream of the given input surface.
+ *
+ * @param bottomUp Flip the vertical axis so pixel data is drawn from the
+ * bottom up, instead of from the top down.
+ */
+bool writeBMP(Common::WriteStream &out, const Graphics::Surface &input, const bool bottomUp = false);
+
} // End of namespace Image
#endif