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authorDennis Kasprzyk <onestone@opencompositing.org>2008-03-04 01:52:38 +0100
committerDennis kasprzyk <onestone@opencompositing.org>2008-03-04 01:52:38 +0100
commit5dcc1680c0bf5c006be168c7571482be72196e64 (patch)
tree6ac16167030f41983416266c8a7e9dbd443d762d /bicubic.c
parent88f77b3563bdfc0893c2fff5d8ce383f0b6001fa (diff)
downloadbicubic-5dcc1680c0bf5c006be168c7571482be72196e64.tar.gz
bicubic-5dcc1680c0bf5c006be168c7571482be72196e64.tar.bz2
Initial commit.
Diffstat (limited to 'bicubic.c')
-rw-r--r--bicubic.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/bicubic.c b/bicubic.c
new file mode 100644
index 0000000..64f621b
--- /dev/null
+++ b/bicubic.c
@@ -0,0 +1,489 @@
+/*
+ *
+ * Compiz bicubic filter plugin
+ *
+ * bicubic.c
+ *
+ * Copyright : (C) 2008 by Dennis Kasprzyk
+ * E-mail : onestone@opencompositing.org
+ *
+ *
+ * This program 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 program 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.
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <compiz-core.h>
+
+static CompMetadata bicubicMetadata;
+
+static int BicubicDisplayPrivateIndex;
+
+typedef struct _BicubicFunction {
+ struct _BicubicFunction *next;
+
+ int handle;
+ int target;
+ int param;
+ int unit;
+} BicubicFunction;
+
+typedef struct _BicubicDisplay
+{
+ int screenPrivateIndex;
+} BicubicDisplay;
+
+
+typedef struct _BicubicScreen
+{
+ DrawWindowTextureProc drawWindowTexture;
+
+ BicubicFunction *func;
+
+ GLenum lTexture;
+
+} BicubicScreen;
+
+#define GET_PLUGIN_CORE(object, plugin) \
+ ((plugin##Core *) (object)->base.privates[plugin##CorePrivateIndex].ptr)
+#define PLUGIN_CORE(object, plugin, prefix) \
+ plugin##Core * prefix##c = GET_PLUGIN_CORE (object, plugin)
+
+#define GET_PLUGIN_DISPLAY(object, plugin) \
+ ((plugin##Display *) \
+ (object)->base.privates[plugin##DisplayPrivateIndex].ptr)
+#define PLUGIN_DISPLAY(object, plugin, prefix) \
+ plugin##Display * prefix##d = GET_PLUGIN_DISPLAY (object, plugin)
+
+#define GET_PLUGIN_SCREEN(object, parent, plugin) \
+ ((plugin##Screen *) \
+ (object)->base.privates[(parent)->screenPrivateIndex].ptr)
+#define PLUGIN_SCREEN(object, plugin, prefix) \
+ plugin##Screen * prefix##s = \
+ GET_PLUGIN_SCREEN (object, \
+ GET_PLUGIN_DISPLAY (s->display, plugin), plugin)
+
+#define GET_PLUGIN_WINDOW(object, parent, plugin) \
+ ((plugin##Window *) \
+ (object)->base.privates[(parent)->windowPrivateIndex].ptr)
+#define PLUGIN_WINDOW(object, plugin, prefix) \
+ plugin##Window * prefix##w = \
+ GET_PLUGIN_WINDOW (object, \
+ GET_PLUGIN_SCREEN (w->screen, \
+ GET_PLUGIN_DISPLAY (w->screen->display, plugin), plugin), plugin)
+
+#define BICUBIC_DISPLAY(d) PLUGIN_DISPLAY(d, Bicubic, b)
+#define BICUBIC_SCREEN(s) PLUGIN_SCREEN(s, Bicubic, b)
+
+static int
+getBicubicFragmentFunction (CompScreen *s,
+ CompTexture *texture,
+ int param,
+ int unit)
+{
+ BicubicFunction *function;
+ CompFunctionData *data;
+ int target;
+ char *targetString;
+
+ BICUBIC_SCREEN (s);
+
+ if (texture->target == GL_TEXTURE_2D)
+ {
+ target = COMP_FETCH_TARGET_2D;
+ targetString = "2D";
+ }
+ else
+ {
+ target = COMP_FETCH_TARGET_RECT;
+ targetString = "RECT";
+ }
+
+ for (function = bs->func; function; function = function->next)
+ if (function->param == param &&
+ function->target == target &&
+ function->unit == unit)
+ return function->handle;
+
+ data = createFunctionData ();
+ if (data)
+ {
+ Bool ok = TRUE;
+ int handle = 0, i;
+
+ static char *filterTemp[] = {
+ "hgX", "hgY", "cs00", "cs01", "cs10", "cs11"
+ };
+
+ for (i = 0; i < sizeof (filterTemp) / sizeof (filterTemp[0]); i++)
+ ok &= addTempHeaderOpToFunctionData (data, filterTemp[i]);
+
+
+ ok &= addDataOpToFunctionData (data,
+ "MAD cs00, fragment.texcoord[0], program.env[%d],"
+ "{-0.5, -0.5, 0.0, 0.0};", param + 2);
+
+ ok &= addDataOpToFunctionData (data,
+ "TEX hgX, cs00.x, texture[%d], 1D;", unit);
+ ok &= addDataOpToFunctionData (data,
+ "TEX hgY, cs00.y, texture[%d], 1D;", unit);
+
+ ok &= addDataOpToFunctionData (data,
+ "MUL cs10, program.env[%d], hgX.y;", param);
+ ok &= addDataOpToFunctionData (data,
+ "MUL cs00, program.env[%d], -hgX.x;", param);
+ ok &= addDataOpToFunctionData (data,
+ "MAD cs11, program.env[%d], hgY.y, cs10;", param + 1);
+ ok &= addDataOpToFunctionData (data,
+ "MAD cs01, program.env[%d], hgY.y, cs00;", param + 1);
+ ok &= addDataOpToFunctionData (data,
+ "MAD cs10, program.env[%d], -hgY.x, cs10;", param + 1);
+ ok &= addDataOpToFunctionData (data,
+ "MAD cs00, program.env[%d], -hgY.x, cs00;", param + 1);
+
+ ok &= addFetchOpToFunctionData (data, "cs00", "cs00", target);
+ ok &= addFetchOpToFunctionData (data, "cs01", "cs01", target);
+ ok &= addFetchOpToFunctionData (data, "cs10", "cs10", target);
+ ok &= addFetchOpToFunctionData (data, "cs11", "cs11", target);
+
+ ok &= addDataOpToFunctionData (data, "LRP cs00, hgY.z, cs00, cs01;");
+ ok &= addDataOpToFunctionData (data, "LRP cs10, hgY.z, cs10, cs11;");
+
+ ok &= addDataOpToFunctionData (data, "LRP output, hgX.z, cs00, cs10;");
+
+ ok &= addColorOpToFunctionData (data, "output", "output");
+ if (!ok)
+ {
+ destroyFunctionData (data);
+ return 0;
+ }
+
+ function = malloc (sizeof (BicubicFunction));
+ if (function)
+ {
+ handle = createFragmentFunction (s, "bicubic", data);
+
+ function->handle = handle;
+ function->target = target;
+ function->param = param;
+ function->unit = unit;
+
+ function->next = bs->func;
+ bs->func = function;
+ }
+
+ destroyFunctionData (data);
+
+ return handle;
+ }
+
+ return 0;
+}
+
+static void
+BicubicDrawWindowTexture (CompWindow *w,
+ CompTexture *texture,
+ const FragmentAttrib *attrib,
+ unsigned int mask)
+{
+ CompScreen *s = w->screen;
+
+ BICUBIC_SCREEN (s);
+
+ if ((mask & (PAINT_WINDOW_TRANSFORMED_MASK |
+ PAINT_WINDOW_ON_TRANSFORMED_SCREEN_MASK)) &&
+ s->filter[SCREEN_TRANS_FILTER] == COMP_TEXTURE_FILTER_GOOD)
+ {
+ FragmentAttrib fa = *attrib;
+ int function, param;
+ int unit = 0;
+
+ param = allocFragmentParameters (&fa, 3);
+ unit = allocFragmentTextureUnits (&fa, 1);
+
+ function = getBicubicFragmentFunction (s, texture, param, unit);
+
+ if (function)
+ {
+ addFragmentFunction (&fa, function);
+
+ (*s->activeTexture) (GL_TEXTURE0_ARB + unit);
+ glBindTexture (GL_TEXTURE_1D, bs->lTexture);
+ (*s->activeTexture) (GL_TEXTURE0_ARB);
+
+ if (texture->target == GL_TEXTURE_2D)
+ {
+ (*s->programEnvParameter4f) (GL_FRAGMENT_PROGRAM_ARB, param,
+ 1.0f / w->width, 0.0f,
+ 0.0f, 0.0f);
+ (*s->programEnvParameter4f) (GL_FRAGMENT_PROGRAM_ARB,
+ param + 1,
+ 0.0f, 1.0f / w->height,
+ 0.0f, 0.0f);
+ (*s->programEnvParameter4f) (GL_FRAGMENT_PROGRAM_ARB,
+ param + 2,
+ w->width, w->height,
+ 0.0f, 0.0f);
+ }
+ else
+ {
+ (*s->programEnvParameter4f) (GL_FRAGMENT_PROGRAM_ARB, param,
+ 1.0f, 0.0f, 0.0f, 0.0f);
+ (*s->programEnvParameter4f) (GL_FRAGMENT_PROGRAM_ARB,
+ param + 1, 0.0f, 1.0f, 0.0f, 0.0f);
+ (*s->programEnvParameter4f) (GL_FRAGMENT_PROGRAM_ARB,
+ param + 2, 1.0f, 1.0f, 0.0f, 0.0f);
+ }
+ }
+
+ UNWRAP (bs, s, drawWindowTexture);
+ (*s->drawWindowTexture) (w, texture, &fa, mask);
+ WRAP (bs, s, drawWindowTexture, BicubicDrawWindowTexture);
+
+ if (unit)
+ {
+ (*s->activeTexture) (GL_TEXTURE0_ARB + unit);
+ glBindTexture (GL_TEXTURE_1D, 0);
+ (*s->activeTexture) (GL_TEXTURE0_ARB);
+ }
+ }
+ else
+ {
+ UNWRAP (bs, s, drawWindowTexture);
+ (*s->drawWindowTexture) (w, texture, attrib, mask);
+ WRAP (bs, s, drawWindowTexture, BicubicDrawWindowTexture);
+ }
+}
+
+static void
+generateLookupTexture (CompScreen *s, GLenum format)
+{
+ GLfloat values[512];
+ int i;
+ float a, a2, a3, w0, w1, w2, w3;
+
+ BICUBIC_SCREEN (s);
+
+ for (i = 0; i < 512; i += 4)
+ {
+ a = (float)i / 512.0;
+ a2 = a * a;
+ a3 = a2 * a;
+
+ w0 = (1.0 / 6.0) * ((-a3) + (3.0 * a2) + (-3.0 * a) + 1.0);
+ w1 = (1.0 / 6.0) * ((3.0 * a3) + (-6.0 * a2) + 4.0);
+ w2 = (1.0 / 6.0) * ((-3.0 * a3) + (3.0 * a2) + (3.0 * a) + 1.0);
+ w3 = (1.0 / 6.0) * a3;
+
+ values[i] = 1.0 - (w1 / (w0 + w1)) + a;
+ values[i + 1] = 1.0 + (w3 / (w2 + w3)) - a;
+ values[i + 2] = w0 + w1;
+ values[i + 3] = w2 + w3;
+ }
+
+ glGenTextures (1, &bs->lTexture);
+
+ glBindTexture (GL_TEXTURE_1D, bs->lTexture);
+
+ glTexImage1D (GL_TEXTURE_1D, 0, format, 128, 0, GL_RGBA,
+ GL_FLOAT, values);
+
+ glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+ glBindTexture (GL_TEXTURE_1D, 0);
+}
+
+static Bool
+BicubicInitDisplay (CompPlugin *p,
+ CompDisplay *d)
+{
+ BicubicDisplay *bd;
+
+ if (!checkPluginABI ("core", CORE_ABIVERSION))
+ return FALSE;
+
+ bd = malloc (sizeof (BicubicDisplay));
+ if (!bd)
+ return FALSE;
+
+ bd->screenPrivateIndex = allocateScreenPrivateIndex(d);
+ if (bd->screenPrivateIndex < 0)
+ {
+ free (bd);
+ return FALSE;
+ }
+
+ d->base.privates[BicubicDisplayPrivateIndex].ptr = bd;
+
+ return TRUE;
+}
+
+static void
+BicubicFiniDisplay (CompPlugin *p,
+ CompDisplay *d)
+{
+ BICUBIC_DISPLAY (d);
+
+ freeScreenPrivateIndex (d, bd->screenPrivateIndex);
+
+ free (bd);
+}
+
+static Bool
+BicubicInitScreen (CompPlugin *p,
+ CompScreen *s)
+{
+ BicubicScreen *bs;
+ const char *glExtensions;
+ GLenum format = GL_RGBA16F_ARB;
+
+ BICUBIC_DISPLAY (s->display);
+
+ if (!s->fragmentProgram)
+ {
+ compLogMessage (s->display, "bicube", CompLogLevelFatal,
+ "GL_ARB_fragment_program not supported.");
+ return FALSE;
+ }
+
+ glExtensions = (const char *) glGetString (GL_EXTENSIONS);
+ if (!glExtensions)
+ {
+ compLogMessage (s->display, "bicubic", CompLogLevelFatal,
+ "No valid GL extensions string found.");
+ return FALSE;
+ }
+
+ if (!strstr (glExtensions, "GL_ARB_texture_float"))
+ {
+ compLogMessage (s->display, "bicubic", CompLogLevelFatal,
+ "GL_ARB_texture_float not supported. "
+ "This can lead to visual artifacts.");
+ format = GL_RGBA;
+ }
+
+ bs = malloc (sizeof (BicubicScreen));
+ if (!bs)
+ return FALSE;
+
+ /* wrap overloaded functions */
+ WRAP (bs, s, drawWindowTexture, BicubicDrawWindowTexture);
+
+ s->base.privates[bd->screenPrivateIndex].ptr = bs;
+
+ generateLookupTexture (s, format);
+
+ bs->func = NULL;
+
+ return TRUE;
+}
+
+static void
+BicubicFiniScreen (CompPlugin *p,
+ CompScreen *s)
+{
+ BicubicFunction *f, *f2;
+
+ BICUBIC_SCREEN (s);
+
+ UNWRAP (bs, s, drawWindowTexture);
+
+ for (f = bs->func; f;)
+ {
+ destroyFragmentFunction (s, f->handle);
+ f2 = f;
+ f = f->next;
+ free (f2);
+ }
+
+ glDeleteTextures (1, &bs->lTexture);
+
+ free (bs);
+}
+
+static Bool
+BicubicInit (CompPlugin * p)
+{
+
+ if (!compInitPluginMetadataFromInfo (&bicubicMetadata, p->vTable->name,
+ 0, 0, 0, 0))
+ return FALSE;
+
+ BicubicDisplayPrivateIndex = allocateDisplayPrivateIndex ();
+ if (BicubicDisplayPrivateIndex < 0)
+ {
+ compFiniMetadata (&bicubicMetadata);
+ return FALSE;
+ }
+
+ compAddMetadataFromFile (&bicubicMetadata, p->vTable->name);
+
+ return TRUE;
+}
+
+static void
+BicubicFini (CompPlugin * p)
+{
+ freeDisplayPrivateIndex (BicubicDisplayPrivateIndex);
+ compFiniMetadata (&bicubicMetadata);
+}
+
+static CompBool
+BicubicInitObject (CompPlugin *p,
+ CompObject *o)
+{
+ static InitPluginObjectProc dispTab[] = {
+ (InitPluginObjectProc) 0,
+ (InitPluginObjectProc) BicubicInitDisplay,
+ (InitPluginObjectProc) BicubicInitScreen
+ };
+
+ RETURN_DISPATCH (o, dispTab, ARRAY_SIZE (dispTab), TRUE, (p, o));
+}
+
+static void
+BicubicFiniObject (CompPlugin *p,
+ CompObject *o)
+{
+ static FiniPluginObjectProc dispTab[] = {
+ (FiniPluginObjectProc) 0,
+ (FiniPluginObjectProc) BicubicFiniDisplay,
+ (FiniPluginObjectProc) BicubicFiniScreen
+ };
+
+ DISPATCH (o, dispTab, ARRAY_SIZE (dispTab), (p, o));
+}
+
+CompPluginVTable BicubicVTable = {
+ "bicubic",
+ 0,
+ BicubicInit,
+ BicubicFini,
+ BicubicInitObject,
+ BicubicFiniObject,
+ 0,
+ 0,
+};
+
+CompPluginVTable*
+getCompPluginInfo20070830 (void)
+{
+ return &BicubicVTable;
+}
+
+