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5d180d1f99
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
/*
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* Copyright (c) 2020, Ben Jilks <benjyjilks@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Vector.h>
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#include <LibGfx/BMPWriter.h>
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#include <LibGfx/Bitmap.h>
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namespace Gfx {
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constexpr int bytes_per_pixel = 3;
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#define FILE_HEADER_SIZE 14
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#define IMAGE_INFORMATION_SIZE 40
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#define PIXEL_DATA_OFFSET FILE_HEADER_SIZE + IMAGE_INFORMATION_SIZE
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class Streamer {
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public:
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Streamer(u8* data)
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: m_data(data)
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{
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}
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void write_u8(u8 i)
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{
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*(m_data++) = i;
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}
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void write_u16(u16 i)
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{
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*(m_data++) = i & 0xFF;
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*(m_data++) = (i >> 8) & 0xFF;
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}
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void write_u32(u32 i)
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{
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write_u16(i & 0xFFFF);
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write_u16((i >> 16) & 0xFFFF);
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}
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void write_i32(i32 i)
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{
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write_u32(static_cast<u32>(i));
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}
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private:
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u8* m_data;
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};
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static ByteBuffer write_pixel_data(const RefPtr<Bitmap> bitmap, int pixel_row_data_size)
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{
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int image_size = pixel_row_data_size * bitmap->height();
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auto buffer = ByteBuffer::create_uninitialized(image_size);
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int current_row = 0;
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for (int y = bitmap->physical_height() - 1; y >= 0; --y) {
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auto* row = buffer.data() + (pixel_row_data_size * current_row++);
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for (int x = 0; x < bitmap->physical_width(); x++) {
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auto pixel = bitmap->get_pixel(x, y);
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row[x * bytes_per_pixel + 0] = pixel.blue();
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row[x * bytes_per_pixel + 1] = pixel.green();
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row[x * bytes_per_pixel + 2] = pixel.red();
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}
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}
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return buffer;
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}
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static ByteBuffer compress_pixel_data(const ByteBuffer& pixel_data, BMPWriter::Compression compression)
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{
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switch (compression) {
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case BMPWriter::Compression::RGB:
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return pixel_data;
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}
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VERIFY_NOT_REACHED();
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}
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ByteBuffer BMPWriter::dump(const RefPtr<Bitmap> bitmap)
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{
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int pixel_row_data_size = (bytes_per_pixel * 8 * bitmap->width() + 31) / 32 * 4;
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int image_size = pixel_row_data_size * bitmap->height();
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auto buffer = ByteBuffer::create_uninitialized(PIXEL_DATA_OFFSET);
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auto pixel_data = write_pixel_data(bitmap, pixel_row_data_size);
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pixel_data = compress_pixel_data(pixel_data, m_compression);
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int file_size = PIXEL_DATA_OFFSET + pixel_data.size();
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Streamer streamer(buffer.data());
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streamer.write_u8('B');
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streamer.write_u8('M');
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streamer.write_u32(file_size);
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streamer.write_u32(0);
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streamer.write_u32(PIXEL_DATA_OFFSET);
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streamer.write_u32(IMAGE_INFORMATION_SIZE); // Header size
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streamer.write_i32(bitmap->width()); // ImageWidth
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streamer.write_i32(bitmap->height()); // ImageHeight
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streamer.write_u16(1); // Planes
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streamer.write_u16(bytes_per_pixel * 8); // BitsPerPixel
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streamer.write_u32((u32)m_compression); // Compression
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streamer.write_u32(image_size); // ImageSize
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streamer.write_i32(0); // XpixelsPerMeter
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streamer.write_i32(0); // YpixelsPerMeter
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streamer.write_u32(0); // TotalColors
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streamer.write_u32(0); // ImportantColors
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buffer.append(pixel_data.data(), pixel_data.size());
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return buffer;
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}
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}
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