dri: add dri_sw.c helper

This is dri_util.c stripped from the drm-specific bits and will be used for
both classic and gallium swrast_dri.so

2 files changed, 382 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/common/dri_sw.c b/src/mesa/drivers/dri/common/dri_sw.c
new file mode 100644
index 00000000000..4b87a7f32f2
--- /dev/null
+++ b/src/mesa/drivers/dri/common/dri_sw.c
@@ -0,0 +1,267 @@
+/*
+ * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * Copyright 2010 George Sapountzis <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file dri_sw.c
+ *
+ * DRISW utility functions, i.e. dri_util.c stripped from drm-specific bits.
+ */
+
+#include "dri_sw.h"
+#include "utils.h"
+
+
+/**
+ * Screen functions
+ */
+
+static void
+setupLoaderExtensions(__DRIscreen *psp,
+		      const __DRIextension **extensions)
+{
+    int i;
+
+    for (i = 0; extensions[i]; i++) {
+	if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
+	    psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
+    }
+}
+
+static __DRIscreen *
+driCreateNewScreen(int scrn, const __DRIextension **extensions,
+		   const __DRIconfig ***driver_configs, void *data)
+{
+    static const __DRIextension *emptyExtensionList[] = { NULL };
+    __DRIscreen *psp;
+
+    (void) data;
+
+    psp = CALLOC_STRUCT(__DRIscreenRec);
+    if (!psp)
+	return NULL;
+
+    setupLoaderExtensions(psp, extensions);
+
+    psp->extensions = emptyExtensionList;
+    psp->myNum = scrn;
+
+    *driver_configs = driDriverAPI.InitScreen(psp);
+
+    if (*driver_configs == NULL) {
+	FREE(psp);
+	return NULL;
+    }
+
+    return psp;
+}
+
+static void driDestroyScreen(__DRIscreen *psp)
+{
+    if (psp) {
+	driDriverAPI.DestroyScreen(psp);
+
+	FREE(psp);
+    }
+}
+
+static const __DRIextension **driGetExtensions(__DRIscreen *psp)
+{
+    return psp->extensions;
+}
+
+
+/**
+ * Context functions
+ */
+
+static __DRIcontext *
+driCreateNewContext(__DRIscreen *psp, const __DRIconfig *config,
+		    __DRIcontext *shared, void *data)
+{
+    __DRIcontext *pcp;
+    void * const shareCtx = (shared != NULL) ? &shared->Base : NULL;
+
+    pcp = CALLOC_STRUCT(__DRIcontextRec);
+    if (!pcp)
+	return NULL;
+
+    pcp->loaderPrivate = data;
+
+    pcp->driScreenPriv = psp;
+    pcp->driDrawablePriv = NULL;
+    pcp->driReadablePriv = NULL;
+
+    if (!driDriverAPI.CreateContext(&config->modes, pcp, shareCtx)) {
+	FREE(pcp);
+	return NULL;
+    }
+
+    return pcp;
+}
+
+static void
+driDestroyContext(__DRIcontext *pcp)
+{
+    if (pcp) {
+	driDriverAPI.DestroyContext(pcp);
+	FREE(pcp);
+    }
+}
+
+static int
+driCopyContext(__DRIcontext *dst, __DRIcontext *src, unsigned long mask)
+{
+    return GL_FALSE;
+}
+
+static void dri_get_drawable(__DRIdrawable *pdp);
+static void dri_put_drawable(__DRIdrawable *pdp);
+
+static int driBindContext(__DRIcontext *pcp,
+			  __DRIdrawable *pdp,
+			  __DRIdrawable *prp)
+{
+    /* Bind the drawable to the context */
+    if (pcp) {
+	pcp->driDrawablePriv = pdp;
+	pcp->driReadablePriv = prp;
+	if (pdp) {
+	    dri_get_drawable(pdp);
+	}
+	if ( prp && pdp != prp ) {
+	    dri_get_drawable(prp);
+	}
+    }
+
+    return driDriverAPI.MakeCurrent(pcp, pdp, prp);
+}
+
+static int driUnbindContext(__DRIcontext *pcp)
+{
+    __DRIdrawable *pdp;
+    __DRIdrawable *prp;
+
+    if (pcp == NULL)
+	return GL_FALSE;
+
+    pdp = pcp->driDrawablePriv;
+    prp = pcp->driReadablePriv;
+
+    /* already unbound */
+    if (!pdp && !prp)
+	return GL_TRUE;
+
+    driDriverAPI.UnbindContext(pcp);
+
+    dri_put_drawable(pdp);
+
+    if (prp != pdp) {
+	dri_put_drawable(prp);
+    }
+
+    pcp->driDrawablePriv = NULL;
+    pcp->driReadablePriv = NULL;
+
+    return GL_TRUE;
+}
+
+
+/**
+ * Drawable functions
+ */
+
+static void dri_get_drawable(__DRIdrawable *pdp)
+{
+    pdp->refcount++;
+}
+
+static void dri_put_drawable(__DRIdrawable *pdp)
+{
+    if (pdp) {
+	pdp->refcount--;
+	if (pdp->refcount)
+	    return;
+
+	driDriverAPI.DestroyBuffer(pdp);
+
+	FREE(pdp);
+    }
+}
+
+static __DRIdrawable *
+driCreateNewDrawable(__DRIscreen *psp,
+		     const __DRIconfig *config, void *data)
+{
+    __DRIdrawable *pdp;
+
+    pdp = CALLOC_STRUCT(__DRIdrawableRec);
+    if (!pdp)
+	return NULL;
+
+    pdp->loaderPrivate = data;
+
+    pdp->driScreenPriv = psp;
+
+    dri_get_drawable(pdp);
+
+    if (!driDriverAPI.CreateBuffer(psp, pdp, &config->modes, GL_FALSE)) {
+	FREE(pdp);
+	return NULL;
+    }
+
+    return pdp;
+}
+
+static void
+driDestroyDrawable(__DRIdrawable *pdp)
+{
+    dri_put_drawable(pdp);
+}
+
+static void driSwapBuffers(__DRIdrawable *pdp)
+{
+    driDriverAPI.SwapBuffers(pdp);
+}
+
+const __DRIcoreExtension driCoreExtension = {
+    { __DRI_CORE, __DRI_CORE_VERSION },
+    NULL, /* driCreateNewScreen */
+    driDestroyScreen,
+    driGetExtensions,
+    driGetConfigAttrib,
+    driIndexConfigAttrib,
+    NULL, /* driCreateNewDrawable */
+    driDestroyDrawable,
+    driSwapBuffers,
+    driCreateNewContext,
+    driCopyContext,
+    driDestroyContext,
+    driBindContext,
+    driUnbindContext
+};
+
+const __DRIswrastExtension driSWRastExtension = {
+    { __DRI_SWRAST, __DRI_SWRAST_VERSION },
+    driCreateNewScreen,
+    driCreateNewDrawable
+};
diff --git a/src/mesa/drivers/dri/common/dri_sw.h b/src/mesa/drivers/dri/common/dri_sw.h
new file mode 100644
index 00000000000..b7257b14a22
--- /dev/null
+++ b/src/mesa/drivers/dri/common/dri_sw.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * Copyright 2010 George Sapountzis <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef _DRI_SW_H
+#define _DRI_SW_H
+
+#include <GL/gl.h>
+#include <GL/internal/dri_interface.h>
+#include "main/mtypes.h"
+
+
+/**
+ * Extensions
+ */
+extern const __DRIcoreExtension driCoreExtension;
+extern const __DRIswrastExtension driSWRastExtension;
+
+
+/**
+ * Data types
+ */
+struct __DRIscreenRec {
+    int myNum;
+
+    int fd;
+
+    void *private;
+
+    const __DRIextension **extensions;
+
+    const __DRIswrastLoaderExtension *swrast_loader;
+};
+
+struct __DRIcontextRec {
+
+    GLcontext Base;
+
+    void *loaderPrivate;
+
+    __DRIdrawable *driDrawablePriv;
+
+    __DRIdrawable *driReadablePriv;
+
+    __DRIscreen *driScreenPriv;
+};
+
+struct __DRIdrawableRec {
+
+    GLframebuffer Base;
+
+    void *loaderPrivate;
+
+    __DRIscreen *driScreenPriv;
+
+    int refcount;
+
+    /* scratch row for optimized front-buffer rendering */
+    char *row;
+};
+
+
+/**
+ * Driver callback functions
+ */
+struct __DriverAPIRec {
+    const __DRIconfig **(*InitScreen) (__DRIscreen * priv);
+
+    void (*DestroyScreen)(__DRIscreen *driScrnPriv);
+
+    GLboolean (*CreateContext)(const __GLcontextModes *glVis,
+                               __DRIcontext *driContextPriv,
+                               void *sharedContextPrivate);
+
+    void (*DestroyContext)(__DRIcontext *driContextPriv);
+
+    GLboolean (*CreateBuffer)(__DRIscreen *driScrnPriv,
+                              __DRIdrawable *driDrawPriv,
+                              const __GLcontextModes *glVis,
+                              GLboolean pixmapBuffer);
+
+    void (*DestroyBuffer)(__DRIdrawable *driDrawPriv);
+
+    void (*SwapBuffers)(__DRIdrawable *driDrawPriv);
+
+    GLboolean (*MakeCurrent)(__DRIcontext *driContextPriv,
+                             __DRIdrawable *driDrawPriv,
+                             __DRIdrawable *driReadPriv);
+
+    GLboolean (*UnbindContext)(__DRIcontext *driContextPriv);
+};
+
+extern const struct __DriverAPIRec driDriverAPI;
+
+#endif /* _DRI_SW_H */