Mesa (gallium-0.2): egl: Add eglscreen to help debug egl mesa screen

[Jakob Bornecrantz]

Module: Mesa
Branch: gallium-0.2
Commit: b6b619c6ffadfd93281073317e19fb90fc68a1c0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=b6b619c6ffadfd93281073317e19fb90fc68a1c0

Author: Jakob Bornecrantz <wallbraker at gmail.com>
Date:   Sun Jan 18 05:14:01 2009 +0100

egl: Add eglscreen to help debug egl mesa screen

---

 progs/egl/.gitignore  |    1 +
 progs/egl/Makefile    |    6 +++
 progs/egl/eglscreen.c |  116 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 123 insertions(+), 0 deletions(-)

diff --git a/progs/egl/.gitignore b/progs/egl/.gitignore
index 497b0eb..793c6c0 100644
--- a/progs/egl/.gitignore
+++ b/progs/egl/.gitignore
@@ -3,6 +3,7 @@ demo2
 demo3
 eglgears
 eglinfo
+eglscreen
 egltri
 peglgears
 xeglgears
diff --git a/progs/egl/Makefile b/progs/egl/Makefile
index f31c21e..e1fdb1c 100644
--- a/progs/egl/Makefile
+++ b/progs/egl/Makefile
@@ -15,6 +15,7 @@ PROGRAMS = \
 	egltri \
 	eglinfo \
 	eglgears \
+	eglscreen \
 	peglgears \
 	xeglgears \
 	xegl_tri
@@ -69,6 +70,11 @@ eglgears: eglgears.o $(TOP)/$(LIB_DIR)/libEGL.so
 eglgears.o: eglgears.c $(HEADERS)
 	$(CC) -c $(CFLAGS) -I$(TOP)/include eglgears.c
 
+eglscreen: eglscreen.o $(TOP)/$(LIB_DIR)/libEGL.so
+	$(CC) $(CFLAGS) $(LDFLAGS) eglscreen.o -L$(TOP)/$(LIB_DIR) -lEGL -lGL $(LIBDRM_LIB) $(APP_LIB_DEPS) -o $@
+
+eglscreen.o: eglscreen.c $(HEADERS)
+	$(CC) -c $(CFLAGS) -I$(TOP)/include eglscreen.c
 
 peglgears: peglgears.o $(TOP)/$(LIB_DIR)/libEGL.so
 	$(CC) $(CFLAGS) peglgears.o -L$(TOP)/$(LIB_DIR) -lEGL -lGL $(LIBDRM_LIB) $(APP_LIB_DEPS) -o $@
diff --git a/progs/egl/eglscreen.c b/progs/egl/eglscreen.c
new file mode 100644
index 0000000..f3b7f04
--- /dev/null
+++ b/progs/egl/eglscreen.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * 
+ * 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.
+ */
+
+/*
+ * Stolen from eglgears
+ *
+ * Creates a surface and show that on the first screen
+ */
+
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <assert.h>
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <GL/gl.h>
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#define MAX_CONFIGS 10
+#define MAX_MODES 100
+
+int
+main(int argc, char *argv[])
+{
+	int maj, min;
+	EGLSurface screen_surf;
+	EGLConfig configs[MAX_CONFIGS];
+	EGLint numConfigs, i;
+	EGLBoolean b;
+	EGLDisplay d;
+	EGLint screenAttribs[10];
+	EGLModeMESA mode[MAX_MODES];
+	EGLScreenMESA screen;
+	EGLint count, chosenMode;
+	EGLint width = 0, height = 0;
+
+	d = eglGetDisplay((EGLNativeDisplayType)"!EGL_i915");
+	assert(d);
+
+	if (!eglInitialize(d, &maj, &min)) {
+		printf("eglscreen: eglInitialize failed\n");
+		exit(1);
+	}
+
+	printf("eglscreen: EGL version = %d.%d\n", maj, min);
+	printf("eglscreen: EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
+
+	/* XXX use ChooseConfig */
+	eglGetConfigs(d, configs, MAX_CONFIGS, &numConfigs);
+	eglGetScreensMESA(d, &screen, 1, &count);
+
+	if (!eglGetModesMESA(d, screen, mode, MAX_MODES, &count) || count == 0) {
+		printf("eglscreen: eglGetModesMESA failed!\n");
+		return 0;
+	}
+
+	/* Print list of modes, and find the one to use */
+	printf("eglscreen: Found %d modes:\n", count);
+	for (i = 0; i < count; i++) {
+		EGLint w, h;
+		eglGetModeAttribMESA(d, mode[i], EGL_WIDTH, &w);
+		eglGetModeAttribMESA(d, mode[i], EGL_HEIGHT, &h);
+		printf("%3d: %d x %d\n", i, w, h);
+		if (w > width && h > height) {
+			width = w;
+			height = h;
+			chosenMode = i;
+		}
+	}
+	printf("eglscreen: Using screen mode/size %d: %d x %d\n", chosenMode, width, height);
+
+	/* build up screenAttribs array */
+	i = 0;
+	screenAttribs[i++] = EGL_WIDTH;
+	screenAttribs[i++] = width;
+	screenAttribs[i++] = EGL_HEIGHT;
+	screenAttribs[i++] = height;
+	screenAttribs[i++] = EGL_NONE;
+
+	screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs);
+	if (screen_surf == EGL_NO_SURFACE) {
+		printf("eglscreen: Failed to create screen surface\n");
+		return 0;
+	}
+
+	b = eglShowScreenSurfaceMESA(d, screen, screen_surf, mode[chosenMode]);
+	if (!b) {
+		printf("eglscreen: Show surface failed\n");
+		return 0;
+	}
+
+	eglDestroySurface(d, screen_surf);
+	eglTerminate(d);
+
+	return 0;
+}