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+/* -*- 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 General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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 <stdio.h>
+
+GUI::PixelBuffer::PixelBuffer(size_t width, size_t height)
+{
+ buf = NULL;
+ realloc(width, height);
+}
+
+void GUI::PixelBuffer::realloc(size_t width, size_t height)
+{
+ if(buf) free(buf);
+ buf = (unsigned char *)calloc(width * height, 3);
+ this->width = width;
+ this->height = height;
+}
+
+#define PX(k) (x + y * width) * 3 + k
+void GUI::PixelBuffer::setPixel(size_t x, size_t y,
+ unsigned char red,
+ unsigned char green,
+ unsigned char blue,
+ unsigned char alpha)
+{
+ //printf("%d %d %d\n", red, green, blue);
+ if(x >= width || y >= height) return;
+ float a = alpha / 255.0;
+ buf[PX(0)] = (unsigned char)(red * a + buf[PX(0)] * (1-a));
+ buf[PX(1)] = (unsigned char)(green * a + buf[PX(1)] * (1-a));
+ buf[PX(2)] = (unsigned char)(blue * a + buf[PX(2)] * (1-a));
+}
+
+static int idx = 0;
+GUI::PixelBufferAlpha::PixelBufferAlpha(size_t width, size_t height)
+{
+ this->idx = ::idx++;
+ buf = NULL;
+ x = y = 0;
+ realloc(width, height);
+}
+
+void GUI::PixelBufferAlpha::realloc(size_t width, size_t height)
+{
+ if(buf) free(buf);
+ buf = (unsigned char *)calloc(width * height, 4);
+ this->width = width;
+ this->height = height;
+}
+
+#undef PX
+#define PX(k) (x + y * width) * 4 + k
+void GUI::PixelBufferAlpha::setPixel(size_t x, size_t y,
+ unsigned char red,
+ unsigned char green,
+ unsigned char blue,
+ unsigned char alpha)
+{
+ // printf("%d %d %d %d\n", red, green, blue, alpha);
+ if(x >= width || y >= height) return;
+ buf[PX(0)] = red;
+ buf[PX(1)] = green;
+ buf[PX(2)] = blue;
+ buf[PX(3)] = alpha;
+}
+
+void GUI::PixelBufferAlpha::pixel(size_t x, size_t y,
+ unsigned char *red,
+ unsigned char *green,
+ unsigned char *blue,
+ unsigned char *alpha)
+{
+ //printf("%d %d %d\n", red, green, blue);
+ if(x > width || y > height) return;
+ *red = buf[PX(0)];
+ *green = buf[PX(1)];
+ *blue = buf[PX(2)];
+ *alpha = buf[PX(3)];
+}
+
+#ifdef TEST_PIXELBUFFER
+//Additional dependency files
+//deps:
+//Required cflags (autoconf vars may be used)
+//cflags:
+//Required link options (autoconf vars may be used)
+//libs:
+#include "test.h"
+
+TEST_BEGIN;
+
+// TODO: Put some testcode here (see test.h for usable macros).
+
+TEST_END;
+
+#endif/*TEST_PIXELBUFFER*/