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-rw-r--r--plugingui/pixelbuffer.cc369
1 files changed, 0 insertions, 369 deletions
diff --git a/plugingui/pixelbuffer.cc b/plugingui/pixelbuffer.cc
deleted file mode 100644
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--- a/plugingui/pixelbuffer.cc
+++ /dev/null
@@ -1,369 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/***************************************************************************
- * pixelbuffer.cc
- *
- * Thu Nov 10 09:00:38 CET 2011
- * Copyright 2011 Bent Bisballe Nyeng
- * deva@aasimon.org
- ****************************************************************************/
-
-/*
- * This file is part of DrumGizmo.
- *
- * DrumGizmo is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * DrumGizmo is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with DrumGizmo; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-#include "pixelbuffer.h"
-
-#include <cassert>
-
-#include <cstdlib>
-#include <cstring>
-#include <algorithm>
-
-namespace GUI
-{
-
-PixelBuffer::PixelBuffer(std::size_t width, std::size_t height)
-{
- realloc(width, height);
-}
-
-PixelBuffer::~PixelBuffer()
-{
-}
-
-void PixelBuffer::realloc(std::size_t width, std::size_t height)
-{
- buf_data.resize(width * height * 3);
- buf = buf_data.data();
- this->width = width;
- this->height = height;
-}
-
-void PixelBuffer::blendLine(std::size_t x, std::size_t y,
- const std::uint8_t* line, std::size_t len)
-{
- std::uint8_t* target = buf + (x + y * width) * 3;
- while(len)
- {
- if(line[3] == 0xff)
- {
- std::memcpy(target, line, 3);
- }
- else
- {
- unsigned int a = line[3];
- unsigned int b = 255 - a;
-
- target[0] = (std::uint8_t)((line[0] * a + target[0] * b) / 255);
- target[1] = (std::uint8_t)((line[1] * a + target[1] * b) / 255);
- target[2] = (std::uint8_t)((line[2] * a + target[2] * b) / 255);
- }
- target += 3;
- line += 4;
- --len;
- }
-}
-
-Rect PixelBuffer::updateBuffer(std::vector<PixelBufferAlpha*>& pixel_buffers)
-{
- bool has_dirty_rect{false};
- Rect dirty_rect;
-
- for(const auto& pixel_buffer : pixel_buffers)
- {
- if(pixel_buffer->dirty)
- {
- auto x1 = (std::size_t)std::max(pixel_buffer->x, 0);
- auto x2 = (std::size_t)std::max((pixel_buffer->x + (int)pixel_buffer->width), 0);
- auto y1 = (std::size_t)std::max(pixel_buffer->y, 0);
- auto y2 = (std::size_t)std::max((pixel_buffer->y + (int)pixel_buffer->height), 0);
-
- pixel_buffer->dirty = false;
- if(!has_dirty_rect)
- {
- // Insert this area:
- dirty_rect = {x1, y1, x2, y2};
- has_dirty_rect = true;
- }
- else
- {
- // Expand existing area:
- auto x1_0 = dirty_rect.x1;
- auto y1_0 = dirty_rect.y1;
- auto x2_0 = dirty_rect.x2;
- auto y2_0 = dirty_rect.y2;
- dirty_rect = {
- (x1_0 < x1) ? x1_0 : x1,
- (y1_0 < y1) ? y1_0 : y1,
- (x2_0 > x2) ? x2_0 : x2,
- (y2_0 > y2) ? y2_0 : y2
- };
- }
- }
-
- if(pixel_buffer->has_last)
- {
- auto x1 = (std::size_t)pixel_buffer->last_x;
- auto x2 = (std::size_t)(pixel_buffer->last_x + pixel_buffer->last_width);
- auto y1 = (std::size_t)pixel_buffer->last_y;
- auto y2 = (std::size_t)(pixel_buffer->last_y + pixel_buffer->last_height);
-
- pixel_buffer->has_last = false;
- if(!has_dirty_rect)
- {
- // Insert this area:
- dirty_rect = {x1, y1, x2, y2};
- has_dirty_rect = true;
- }
- else
- {
- // Expand existing area:
- auto x1_0 = dirty_rect.x1;
- auto y1_0 = dirty_rect.y1;
- auto x2_0 = dirty_rect.x2;
- auto y2_0 = dirty_rect.y2;
- dirty_rect = {
- (x1_0 < x1) ? x1_0 : x1,
- (y1_0 < y1) ? y1_0 : y1,
- (x2_0 > x2) ? x2_0 : x2,
- (y2_0 > y2) ? y2_0 : y2
- };
- }
- }
- }
-
- if(!has_dirty_rect)
- {
- return {};
- }
-
- for(const auto& pixel_buffer : pixel_buffers)
- {
- if(!pixel_buffer->visible)
- {
- continue;
- }
-
- int update_width = pixel_buffer->width;
- int update_height = pixel_buffer->height;
-
- // Skip buffer if not inside window.
- if(((int)width < pixel_buffer->x) ||
- ((int)height < pixel_buffer->y))
- {
- continue;
- }
-
- if(update_width > ((int)width - pixel_buffer->x))
- {
- update_width = ((int)width - pixel_buffer->x);
- }
-
- if(update_height > ((int)height - pixel_buffer->y))
- {
- update_height = ((int)height - pixel_buffer->y);
- }
-
- auto from_x = (int)dirty_rect.x1 - pixel_buffer->x;
- from_x = std::max(0, from_x);
- auto from_y = (int)dirty_rect.y1 - pixel_buffer->y;
- from_y = std::max(0, from_y);
-
- auto to_x = (int)dirty_rect.x2 - pixel_buffer->x;
- to_x = std::min(to_x, (int)update_width);
- auto to_y = (int)dirty_rect.y2 - pixel_buffer->y;
- to_y = std::min(to_y, (int)update_height);
-
- if(to_x < from_x)
- {
- continue;
- }
-
- for(int y = from_y; y < to_y; y++)
- {
- blendLine(pixel_buffer->x + from_x,
- pixel_buffer->y + y,
- pixel_buffer->getLine(from_x, y),
- to_x - from_x);
- }
- }
-
- dirty_rect.x2 = std::min(width, dirty_rect.x2);
- dirty_rect.y2 = std::min(height, dirty_rect.y2);
-
- // Make sure we don't try to paint a rect backwards.
- if(dirty_rect.x1 > dirty_rect.x2)
- {
- std::swap(dirty_rect.x1, dirty_rect.x2);
- }
-
- if(dirty_rect.y1 > dirty_rect.y2)
- {
- std::swap(dirty_rect.y1, dirty_rect.y2);
- }
-
- return dirty_rect;
-}
-
-PixelBufferAlpha::PixelBufferAlpha(std::size_t width, std::size_t height)
-{
- realloc(width, height);
-}
-
-PixelBufferAlpha::~PixelBufferAlpha()
-{
-}
-
-void PixelBufferAlpha::realloc(std::size_t width, std::size_t height)
-{
- buf_data.resize(width * height * 4);
- buf = buf_data.data();
- this->width = width;
- this->height = height;
- clear();
-}
-
-void PixelBufferAlpha::clear()
-{
- std::memset(buf, 0, width * height * 4);
-}
-
-void PixelBufferAlpha::setPixel(std::size_t x, std::size_t y, const Colour& c)
-{
- std::uint8_t* pixel = buf + (x + y * width) * 4;
- std::memcpy(pixel, c.data(), 4);
-}
-
-void PixelBufferAlpha::writeLine(std::size_t x, std::size_t y,
- const std::uint8_t* line, std::size_t len)
-{
- if(x >= width || y >= height)
- {
- return;
- }
-
- if(x + len > width)
- {
- len = width - x;
- }
-
- auto offset = buf + (x + y * width) * 4;
-
- std::memcpy(offset, line, len * 4);
-}
-
-
-// SIMD: https://github.com/WojciechMula/toys/blob/master/blend_32bpp/blend_32bpp.c
-// Alpha blending: http://en.wikipedia.org/wiki/Alpha_compositing
-
-void PixelBufferAlpha::blendLine(std::size_t x, std::size_t y,
- const std::uint8_t* line, std::size_t len)
-{
- if(x >= width || y >= height)
- {
- return;
- }
-
- if(x + len > width)
- {
- len = width - x;
- }
-
- int a, b;
- std::uint8_t* target = buf + (x + y * width) * 4;
- while(len)
- {
- if(line[3] == 0xff)
- {
- const std::uint8_t* end = line;
- while(end[3] == 0xff && end < line + len * 4)
- {
- end += 4;
- }
- auto chunk_len = end - line;
- std::memcpy(target, line, chunk_len);
- line += chunk_len;
- target += chunk_len;
- len -= chunk_len / 4;
- continue;
- }
- else if(line[3] == 0)
- {
- // Do nothing
- }
- else
- {
- a = line[3];
- b = target[3] * (255 - a) / 255;
-
- target[0] = (line[0] * a + target[0] * b) / (a + b);
- target[1] = (line[1] * a + target[1] * b) / (a + b);
- target[2] = (line[2] * a + target[2] * b) / (a + b);
- target[3] = (int)target[3] + line[3] * (255 - target[3]) / 255;
- }
-
- line += 4;
- target += 4;
- --len;
- }
-}
-
-void PixelBufferAlpha::addPixel(std::size_t x, std::size_t y, const Colour& c)
-{
- if(x >= width || y >= height)
- {
- return; // out of bounds
- }
-
- const std::uint8_t* colour = c.data();
-
- if(colour[3] == 0)
- {
- return;
- }
-
- int a, b;
- std::uint8_t* target = buf + (x + y * width) * 4;
-
- if(colour[3] == 0xff)
- {
- std::memcpy(target, colour, 4);
- }
- else
- {
- a = colour[3];
- b = target[3] * (255 - a) / 255;
-
- target[0] = (colour[0] * a + target[0] * b) / (a + b);
- target[1] = (colour[1] * a + target[1] * b) / (a + b);
- target[2] = (colour[2] * a + target[2] * b) / (a + b);
- target[3] = (int)target[3] + colour[3] * (255 - target[3]) / 255;
- }
-}
-
-const Colour& PixelBufferAlpha::pixel(std::size_t x, std::size_t y) const
-{
- static Colour c;
- std::memcpy(c.data(), buf + (x + y * width) * 4, 4);
- return c;
-}
-
-const std::uint8_t* PixelBufferAlpha::getLine(std::size_t x, std::size_t y) const
-{
- return buf + (x + y * width) * 4;
-}
-
-} // GUI::
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