Adrien Destugues
e89985cc31
- Colors were reversed - Padding was not handled properly because of a roundeing error Add a test that shows the issue (behavior confirmed against BeOS) Change-Id: I4c6e954fb6bdab92ad4e0e96897e78b26eb4727b Reviewed-on: https://review.haiku-os.org/c/1025 Reviewed-by: Stephan Aßmus <[email protected]>
91 lines
1.7 KiB
C++
91 lines
1.7 KiB
C++
/*
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* Copyright 2019, Adrien Destugues <[email protected]>
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* Distributed under terms of the MIT license.
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*/
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#include <Application.h>
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#include <Bitmap.h>
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#include <View.h>
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#include <Window.h>
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#include <assert.h>
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class BitmapView: public BView
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{
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public:
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BitmapView(BBitmap* bitmap)
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: BView(bitmap->Bounds(), "test view", B_FOLLOW_LEFT_TOP, B_WILL_DRAW)
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, fBitmap(bitmap)
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{
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}
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~BitmapView()
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{
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delete fBitmap;
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}
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void Draw(BRect updateRect)
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{
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DrawBitmap(fBitmap);
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}
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private:
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BBitmap* fBitmap;
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};
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int
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main(void)
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{
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BApplication app("application/Haiku-BitmapTest");
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BWindow* window = new BWindow(BRect(10, 10, 100, 100),
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"Bitmap drawing test", B_DOCUMENT_WINDOW, B_QUIT_ON_WINDOW_CLOSE);
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window->Show();
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BBitmap* bitmap = new BBitmap(BRect(0, 0, 24, 24), B_GRAY1);
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// Bitmap is 25 pixels wide, which rounds up to 4 pixels
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// The last byte only has one bit used, and 7 bits of padding
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assert(bitmap->BytesPerRow() == 4);
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// This was extracted from letter_a.pbm and should look mostly like a
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// black "A" letter on a white background (confirmed BeOS behavior)
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const unsigned char data[] = {
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0, 0, 0, 0,
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0, 8, 0, 0,
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0, 0x1c, 0, 0,
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0, 0x3e, 0, 0,
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0, 0x7e, 0, 0,
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0, 0xFF, 0, 0,
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0, 0xE7, 0, 0,
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0, 0xC3, 0, 0,
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1, 0xC3, 0x80, 0,
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1, 0x81, 0x80, 0,
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3, 0x81, 0xC0, 0,
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3, 0xFF, 0xC0, 0,
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7, 0xFF, 0xE0, 0,
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7, 0xFF, 0xE0, 0,
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7, 0x81, 0xE0, 0,
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0x0F, 0, 0x0F, 0,
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0x0F, 0, 0x0F, 0,
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0x1F, 0, 0xF8, 0,
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0x1E, 0, 0x78, 0,
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0x1C, 0, 0x38, 0,
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0x3C, 0, 0x3C, 0,
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0x3C, 0, 0x3C, 0,
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0x38, 0, 0x0E, 0,
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0x78, 0, 0x0F, 0,
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0, 0, 0, 0
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};
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bitmap->SetBits(data, sizeof(data), 0, B_GRAY1);
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BView* view = new BitmapView(bitmap);
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window->AddChild(view);
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app.Run();
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return 0;
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}
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