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-rw-r--r--tests/unit/conv.cxx361
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diff --git a/tests/unit/conv.cxx b/tests/unit/conv.cxx
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+/* Copyright 2013-2014 Pierre Ossman <ossman@cendio.se> for Cendio AB
+ *
+ * This 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.
+ *
+ * This software 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 this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <rfb/PixelFormat.h>
+
+static const rdr::U8 pixelRed = 0xf1;
+static const rdr::U8 pixelGreen = 0xc3;
+static const rdr::U8 pixelBlue = 0x97;
+
+static const int fbWidth = 40;
+static const int fbHeight = 30;
+static const int fbArea = fbWidth * fbHeight;
+// Maximum bpp, plus some room for unaligned fudging
+static const int fbMalloc = (fbArea * 4) + 4;
+
+typedef bool (*testfn) (const rfb::PixelFormat&, const rfb::PixelFormat&);
+
+struct TestEntry {
+ const char *label;
+ testfn fn;
+};
+
+#define min(a,b) (((a) < (b)) ? (a) : (b))
+
+namespace rfb {
+
+void makePixel(const rfb::PixelFormat &pf,
+ rdr::U8 *buffer)
+{
+ rfb::Pixel p;
+
+ p = 0;
+ p |= (pixelRed >> (8 - pf.redBits)) << pf.redShift;
+ p |= (pixelGreen >> (8 - pf.greenBits)) << pf.greenShift;
+ p |= (pixelBlue >> (8 - pf.blueBits)) << pf.blueShift;
+
+ // FIXME: Should we reimplement this as well?
+ pf.bufferFromPixel(buffer, p);
+}
+
+bool verifyPixel(const rfb::PixelFormat &dstpf,
+ const rfb::PixelFormat &srcpf,
+ const rdr::U8 *buffer)
+{
+ rfb::Pixel p;
+ int r, g, b;
+ int re, ge, be;
+
+ // FIXME: Should we reimplement this as well?
+ p = dstpf.pixelFromBuffer(buffer);
+
+ r = (p >> dstpf.redShift) & dstpf.redMax;
+ g = (p >> dstpf.greenShift) & dstpf.greenMax;
+ b = (p >> dstpf.blueShift) & dstpf.blueMax;
+
+ r = (r * 255 + dstpf.redMax/2) / dstpf.redMax;
+ g = (g * 255 + dstpf.greenMax/2) / dstpf.greenMax;
+ b = (b * 255 + dstpf.blueMax/2) / dstpf.blueMax;
+
+ // The allowed error depends on:
+ //
+ // a) The number of bits the format can hold
+ // b) The number of bits the source format could hold
+
+ re = (1 << (8 - min(dstpf.redBits, srcpf.redBits))) - 1;
+ ge = (1 << (8 - min(dstpf.greenBits, srcpf.greenBits))) - 1;
+ be = (1 << (8 - min(dstpf.blueBits, srcpf.blueBits))) - 1;
+
+ if (abs(r - pixelRed) > re)
+ return false;
+ if (abs(g - pixelGreen) > ge)
+ return false;
+ if (abs(b - pixelBlue) > be)
+ return false;
+
+ return true;
+}
+
+}
+
+using rfb::makePixel;
+using rfb::verifyPixel;
+
+static bool testPixel(const rfb::PixelFormat &dstpf,
+ const rfb::PixelFormat &srcpf)
+{
+ rfb::Pixel p;
+ rdr::U8 buffer[4];
+
+ makePixel(srcpf, buffer);
+
+ p = srcpf.pixelFromBuffer(buffer);
+ p = dstpf.pixelFromPixel(srcpf, p);
+ memset(buffer, 0, sizeof(buffer));
+ dstpf.bufferFromPixel(buffer, p);
+
+ if (!verifyPixel(dstpf, srcpf, buffer))
+ return false;
+
+ return true;
+}
+
+static bool testBuffer(const rfb::PixelFormat &dstpf,
+ const rfb::PixelFormat &srcpf)
+{
+ int i, x, y, unaligned;
+ rdr::U8 bufIn[fbMalloc], bufOut[fbMalloc];
+
+ // Once aligned, and once unaligned
+ for (unaligned = 0;unaligned < 2;unaligned++) {
+ for (i = 0;i < fbArea;i++)
+ makePixel(srcpf, bufIn + unaligned + i*srcpf.bpp/8);
+
+ memset(bufOut, 0, sizeof(bufOut));
+ dstpf.bufferFromBuffer(bufOut + unaligned, srcpf,
+ bufIn + unaligned, fbArea);
+
+ for (i = 0;i < fbArea;i++) {
+ if (!verifyPixel(dstpf, srcpf, bufOut + unaligned + i*dstpf.bpp/8))
+ return false;
+ }
+
+ memset(bufIn, 0, sizeof(bufIn));
+ for (y = 0;y < fbHeight;y++) {
+ for (x = 0;x < fbWidth/2;x++)
+ makePixel(srcpf, bufIn + unaligned + (x + y*fbWidth)*srcpf.bpp/8);
+ }
+
+ memset(bufOut, 0, sizeof(bufOut));
+ dstpf.bufferFromBuffer(bufOut + unaligned, srcpf, bufIn + unaligned,
+ fbWidth/2, fbHeight, fbWidth, fbWidth);
+
+ for (y = 0;y < fbHeight;y++) {
+ for (x = 0;x < fbWidth;x++) {
+ if (x < fbWidth/2) {
+ if (!verifyPixel(dstpf, srcpf,
+ bufOut + unaligned + (x + y*fbWidth)*dstpf.bpp/8))
+ return false;
+ } else {
+ const rdr::U8 zero[4] = { 0, 0, 0, 0 };
+ if (memcmp(bufOut + unaligned + (x + y*fbWidth)*dstpf.bpp/8, zero,
+ dstpf.bpp/8) != 0)
+ return false;
+ }
+ }
+ }
+ }
+
+ return true;
+}
+
+static bool testRGB(const rfb::PixelFormat &dstpf,
+ const rfb::PixelFormat &srcpf)
+{
+ int i, x, y, unaligned;
+ rdr::U8 bufIn[fbMalloc], bufRGB[fbMalloc], bufOut[fbMalloc];
+
+ // Once aligned, and once unaligned
+ for (unaligned = 0;unaligned < 2;unaligned++) {
+ for (i = 0;i < fbArea;i++)
+ makePixel(srcpf, bufIn + unaligned + i*srcpf.bpp/8);
+
+ memset(bufRGB, 0, sizeof(bufRGB));
+ srcpf.rgbFromBuffer(bufRGB + unaligned, bufIn + unaligned, fbArea);
+
+ memset(bufOut, 0, sizeof(bufOut));
+ dstpf.bufferFromRGB(bufOut + unaligned, bufRGB + unaligned, fbArea);
+
+ for (i = 0;i < fbArea;i++) {
+ if (!verifyPixel(dstpf, srcpf, bufOut + unaligned + i*dstpf.bpp/8))
+ return false;
+ }
+
+ memset(bufIn, 0, sizeof(bufIn));
+ for (y = 0;y < fbHeight;y++) {
+ for (x = 0;x < fbWidth/2;x++)
+ makePixel(srcpf, bufIn + unaligned + (x + y*fbWidth)*srcpf.bpp/8);
+ }
+
+ memset(bufRGB, 0, sizeof(bufRGB));
+ srcpf.rgbFromBuffer(bufRGB + unaligned, bufIn + unaligned,
+ fbWidth/2, fbWidth, fbHeight);
+
+ memset(bufOut, 0, sizeof(bufOut));
+ dstpf.bufferFromRGB(bufOut + unaligned, bufRGB + unaligned,
+ fbWidth/2, fbWidth, fbHeight);
+
+ for (y = 0;y < fbHeight;y++) {
+ for (x = 0;x < fbWidth;x++) {
+ if (x < fbWidth/2) {
+ if (!verifyPixel(dstpf, srcpf,
+ bufOut + unaligned + (x + y*fbWidth)*dstpf.bpp/8))
+ return false;
+ } else {
+ const rdr::U8 zero[4] = { 0, 0, 0, 0 };
+ if (memcmp(bufOut + unaligned + (x + y*fbWidth)*dstpf.bpp/8, zero,
+ dstpf.bpp/8) != 0)
+ return false;
+ }
+ }
+ }
+ }
+
+ return true;
+}
+
+static bool testPixelRGB(const rfb::PixelFormat &dstpf,
+ const rfb::PixelFormat &srcpf)
+{
+ rfb::Pixel p;
+ rdr::U16 r16, g16, b16;
+ rdr::U8 r8, g8, b8;
+ rdr::U8 buffer[4];
+
+ makePixel(srcpf, buffer);
+
+ p = srcpf.pixelFromBuffer(buffer);
+ srcpf.rgbFromPixel(p, &r16, &g16, &b16);
+ p = dstpf.pixelFromRGB(r16, g16, b16);
+ memset(buffer, 0, sizeof(buffer));
+ dstpf.bufferFromPixel(buffer, p);
+
+ if (!verifyPixel(dstpf, srcpf, buffer))
+ return false;
+
+ makePixel(srcpf, buffer);
+
+ p = srcpf.pixelFromBuffer(buffer);
+ srcpf.rgbFromPixel(p, &r8, &g8, &b8);
+ p = dstpf.pixelFromRGB(r8, g8, b8);
+ memset(buffer, 0, sizeof(buffer));
+ dstpf.bufferFromPixel(buffer, p);
+
+ if (!verifyPixel(dstpf, srcpf, buffer))
+ return false;
+
+ return true;
+}
+
+struct TestEntry tests[] = {
+ {"Pixel from pixel", testPixel},
+ {"Buffer from buffer", testBuffer},
+ {"Buffer to/from RGB", testRGB},
+ {"Pixel to/from RGB", testPixelRGB},
+};
+
+static void doTests(const rfb::PixelFormat &dstpf,
+ const rfb::PixelFormat &srcpf)
+{
+ size_t i;
+ char dstb[256], srcb[256];
+
+ dstpf.print(dstb, sizeof(dstb));
+ srcpf.print(srcb, sizeof(srcb));
+
+ printf("\n");
+ printf("%s to %s\n", srcb, dstb);
+ printf("\n");
+
+ for (i = 0;i < sizeof(tests)/sizeof(tests[0]);i++) {
+ printf(" %s: ", tests[i].label);
+ fflush(stdout);
+ if (tests[i].fn(dstpf, srcpf))
+ printf("OK");
+ else
+ printf("FAILED");
+ printf("\n");
+ }
+}
+
+int main(int argc, char **argv)
+{
+ rfb::PixelFormat dstpf, srcpf;
+
+ printf("Pixel Conversion Correctness Test\n");
+
+ /* rgb888 targets */
+
+ dstpf.parse("rgb888");
+
+ srcpf.parse("rgb888");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("bgr888");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("rgb565");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("rgb232");
+ doTests(dstpf, srcpf);
+
+ /* rgb565 targets */
+
+ dstpf.parse("rgb565");
+
+ srcpf.parse("rgb888");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("bgr565");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("rgb232");
+ doTests(dstpf, srcpf);
+
+ /* rgb232 targets */
+
+ dstpf.parse("rgb232");
+
+ srcpf.parse("rgb888");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("rgb565");
+ doTests(dstpf, srcpf);
+
+ srcpf.parse("bgr232");
+ doTests(dstpf, srcpf);
+
+ /* endian conversion (both ways) */
+
+ dstpf = rfb::PixelFormat(32, 24, false, true, 255, 255, 255, 0, 8, 16);
+ srcpf = rfb::PixelFormat(32, 24, true, true, 255, 255, 255, 0, 8, 16);
+
+ doTests(dstpf, srcpf);
+
+ doTests(srcpf, dstpf);
+
+ dstpf = rfb::PixelFormat(16, 16, false, true, 31, 63, 31, 0, 5, 11);
+ srcpf = rfb::PixelFormat(16, 16, true, true, 31, 63, 31, 0, 5, 11);
+
+ doTests(dstpf, srcpf);
+
+ doTests(srcpf, dstpf);
+
+ // Pesky case that is very asymetrical
+ dstpf = rfb::PixelFormat(32, 24, false, true, 255, 255, 255, 0, 8, 16);
+ srcpf = rfb::PixelFormat(32, 24, true, true, 255, 255, 255, 0, 24, 8);
+
+ doTests(dstpf, srcpf);
+
+ doTests(srcpf, dstpf);
+}
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