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56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
/*
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* Copyright (c) 2024, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <LibGfx/Painter.h>
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TEST_CASE(draw_scaled_bitmap_with_transform)
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{
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auto bitmap = MUST(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, { 40, 30 }));
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bitmap->fill(Gfx::Color::White);
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Gfx::Painter painter(bitmap);
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auto source_bitmap = MUST(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, { 1, 1 }));
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source_bitmap->fill(Gfx::Color::Black);
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auto dest_rect = source_bitmap->rect();
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auto source_rect = source_bitmap->rect().to_rounded<float>();
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// Identity transform: Lower left pixel is black, rest stays white.
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Gfx::AffineTransform transform;
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painter.draw_scaled_bitmap_with_transform(dest_rect, source_bitmap, source_rect, transform);
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for (int y = 0; y < bitmap->height(); ++y) {
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for (int x = 0; x < bitmap->width(); ++x) {
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if (x == 0 && y == 0)
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EXPECT_EQ(bitmap->get_pixel(x, y), Color::Black);
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else
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EXPECT_EQ(bitmap->get_pixel(x, y), Color::White);
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}
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}
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// Scale up 1x1 source bitmap 10x in x and 5x in y and paint at 10, 20. Should fill that rect:
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bitmap->fill(Gfx::Color::White);
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transform = transform.translate(10, 20).scale(10, 5);
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painter.draw_scaled_bitmap_with_transform(dest_rect, source_bitmap, source_rect, transform);
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for (int y = 0; y < bitmap->height(); ++y) {
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for (int x = 0; x < bitmap->width(); ++x) {
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if (x >= 10 && x < 10 + 10 && y >= 20 && y < 20 + 5)
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EXPECT_EQ(bitmap->get_pixel(x, y), Color::Black);
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else
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EXPECT_EQ(bitmap->get_pixel(x, y), Color::White);
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}
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}
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}
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TEST_CASE(draw_rect_rough_bounds)
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{
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auto bitmap = MUST(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, { 10, 10 }));
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Gfx::Painter painter(*bitmap);
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painter.draw_rect(Gfx::IntRect(0, 0, 1, 1), Color::Black, true);
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painter.draw_rect(Gfx::IntRect(9, 9, 1, 1), Color::Black, true);
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}
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