cmds: Add osdemo applicatoin with direct framebuffer access

Jorjeh · Jul 1, 2017 · fc2169e · fc2169e
1 parent 6d51e4f
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diff --git a/platform/mesa/cmds/osdemo_fb/Mybuild b/platform/mesa/cmds/osdemo_fb/Mybuild
@@ -0,0 +1,26 @@
+package embox.cmd
+
+@AutoCmd
+@Cmd(name = "osdemo_fb",
+	help = "Adopted osdemo application from mesa_demo",
+	man = '''
+		NAME
+			osdemo_fb - Adopted osdemo application from mesa_demo
+		SYNOPSIS
+			osdemo_fb
+		DESCRIPTION
+			osdemo_fb - Adopted osdemo application from mesa_demo
+		AUTHORS
+			Anton Bondarev
+	''')
+@BuildDepends(third_party.freedesktop.mesa.mesa_osmesa)
+@BuildDepends(third_party.freedesktop.mesa.libglu_osmesa)
+@Build(stage=2,script="true")
+module osdemo_fb {
+	@IncludePath("$(ROOT_DIR)/build/extbld/third_party/freedesktop/mesa/libglu_osmesa/glu-9.0.0/include")
+	@IncludePath("$(ROOT_DIR)/build/extbld/third_party/freedesktop/mesa/mesa_osmesa/mesa-17.0.3/include")
+	source "osdemo_fb.c"
+
+	depends third_party.freedesktop.mesa.mesa_osmesa
+	depends third_party.freedesktop.mesa.libglu_osmesa
+}
diff --git a/platform/mesa/cmds/osdemo_fb/osdemo_fb.c b/platform/mesa/cmds/osdemo_fb/osdemo_fb.c
@@ -0,0 +1,269 @@
+/**
+ * @file
+ * @brief
+ *
+ * @date Jun 21, 2017
+ * @author Anton Bondarev
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <math.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include <drivers/video/fb.h>
+
+#include <GL/osmesa.h>
+#include <GL/glu.h>
+#include <GL/gl.h>
+
+extern void cxx_app_startup(void);
+void *create_video_buffer(void) {
+	long int screensize = 0;
+	struct fb_info *fb_info;
+	uint8_t *fbp = 0;
+
+	fb_info = fb_lookup(0);
+
+	printf("%dx%d, %dbpp\n", fb_info->var.xres, fb_info->var.yres,
+			fb_info->var.bits_per_pixel);
+
+	/* Figure out the size of the screen in bytes */
+	screensize = fb_info->var.xres * fb_info->var.yres
+			* fb_info->var.bits_per_pixel / 8;
+
+	/* Map the device to memory */
+	fbp = (uint8_t *) mmap_device_memory((void *) fb_info->screen_base,
+			screensize, PROT_READ | PROT_WRITE, MAP_SHARED,
+			(uint64_t) ((uintptr_t) fb_info->screen_base));
+	if ((int) fbp == -1) {
+		perror("Error: failed to map framebuffer device to memory");
+		exit(4);
+	}
+	printf("The framebuffer device was mapped to memory successfully.\n");
+
+	return fbp;
+}
+
+void destroy_video_buffer(void *buffer) {
+	struct fb_info *fb_info;
+	long int screensize = 0;
+
+	fb_info = fb_lookup(0);
+	/* Figure out the size of the screen in bytes */
+	screensize = fb_info->var.xres * fb_info->var.yres
+			* fb_info->var.bits_per_pixel / 8;
+
+	munmap(buffer, screensize);
+}
+
+
+/*********************************
+ *
+ *
+ *********************************/
+static int Width = 400;
+static int Height = 400;
+
+
+static void
+Sphere(float radius, int slices, int stacks)
+{
+   GLUquadric *q = gluNewQuadric();
+   gluQuadricNormals(q, GLU_SMOOTH);
+   gluSphere(q, radius, slices, stacks);
+   gluDeleteQuadric(q);
+}
+
+
+static void
+Cone(float base, float height, int slices, int stacks)
+{
+   GLUquadric *q = gluNewQuadric();
+   gluQuadricDrawStyle(q, GLU_FILL);
+   gluQuadricNormals(q, GLU_SMOOTH);
+   gluCylinder(q, base, 0.0, height, slices, stacks);
+   gluDeleteQuadric(q);
+}
+
+static void
+Torus(float innerRadius, float outerRadius, int sides, int rings)
+{
+   /* from GLUT... */
+   int i, j;
+   GLfloat theta, phi, theta1;
+   GLfloat cosTheta, sinTheta;
+   GLfloat cosTheta1, sinTheta1;
+   const GLfloat ringDelta = 2.0 * M_PI / rings;
+   const GLfloat sideDelta = 2.0 * M_PI / sides;
+
+   theta = 0.0;
+   cosTheta = 1.0;
+   sinTheta = 0.0;
+   for (i = rings - 1; i >= 0; i--) {
+      theta1 = theta + ringDelta;
+      cosTheta1 = cos(theta1);
+      sinTheta1 = sin(theta1);
+      glBegin(GL_QUAD_STRIP);
+      phi = 0.0;
+      for (j = sides; j >= 0; j--) {
+         GLfloat cosPhi, sinPhi, dist;
+
+         phi += sideDelta;
+         cosPhi = cos(phi);
+         sinPhi = sin(phi);
+         dist = outerRadius + innerRadius * cosPhi;
+
+         glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
+         glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, innerRadius * sinPhi);
+         glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
+         glVertex3f(cosTheta * dist, -sinTheta * dist,  innerRadius * sinPhi);
+      }
+      glEnd();
+      theta = theta1;
+      cosTheta = cosTheta1;
+      sinTheta = sinTheta1;
+   }
+}
+
+
+static void
+render_image(void)
+{
+   GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+   GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
+   GLfloat red_mat[]   = { 1.0, 0.2, 0.2, 1.0 };
+   GLfloat green_mat[] = { 0.2, 1.0, 0.2, 1.0 };
+   GLfloat blue_mat[]  = { 0.2, 0.2, 1.0, 1.0 };
+
+
+   glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+   glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+   glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
+   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(20.0, 1.0, 0.0, 0.0);
+
+   glPushMatrix();
+   glTranslatef(-0.75, 0.5, 0.0);
+   glRotatef(90.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat );
+   Torus(0.275, 0.85, 20, 20);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-0.75, -0.5, 0.0);
+   glRotatef(270.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat );
+   Cone(1.0, 2.0, 16, 1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(0.75, 0.0, -1.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
+   Sphere(1.0, 20, 20);
+   glPopMatrix();
+
+   glPopMatrix();
+
+   /* This is very important!!!
+    * Make sure buffered commands are finished!!!
+    */
+   glFinish();
+}
+
+int main() {
+	OSMesaContext ctx;
+	void *buffer;
+
+	cxx_app_startup();
+#if 0
+	char *filename = NULL;
+
+	if (argc < 2) {
+		fprintf(stderr, "Usage:\n");
+		fprintf(stderr, "  osdemo filename [width height]\n");
+		return 0;
+	}
+
+	filename = argv[1];
+	if (argc == 4) {
+		Width = atoi(argv[2]);
+		Height = atoi(argv[3]);
+	}
+#endif
+	/* Create an RGBA-mode context */
+#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
+	/* specify Z, stencil, accum sizes */
+	ctx = OSMesaCreateContextExt( OSMESA_RGBA, 16, 0, 0, NULL );
+#else
+	ctx = OSMesaCreateContext(OSMESA_RGBA, NULL);
+#endif
+	if (!ctx) {
+		printf("OSMesaCreateContext failed!\n");
+		return 0;
+	}
+#if 0
+	/* Allocate the image buffer */
+	buffer = malloc(Width * Height * 4 * sizeof(GLubyte));
+	if (!buffer) {
+		printf("Alloc image buffer failed!\n");
+		return 0;
+	}
+#endif
+	buffer = create_video_buffer();
+	/* Bind the buffer to the context and make it current */
+	if (!OSMesaMakeCurrent(ctx, buffer, GL_UNSIGNED_BYTE, Width, Height)) {
+		printf("OSMesaMakeCurrent failed!\n");
+		return 0;
+	}
+
+	{
+		int z, s, a;
+		glGetIntegerv(GL_DEPTH_BITS, &z);
+		glGetIntegerv(GL_STENCIL_BITS, &s);
+		glGetIntegerv(GL_ACCUM_RED_BITS, &a);
+		printf("Depth=%d Stencil=%d Accum=%d\n", z, s, a);
+	}
+
+	render_image();
+#if 0
+	if (filename != NULL) {
+#ifdef SAVE_TARGA
+		write_targa(filename, buffer, Width, Height);
+#else
+		write_ppm(filename, buffer, Width, Height);
+#endif
+	} else {
+		printf("Specify a filename if you want to make an image file\n");
+	}
+#endif
+	printf("all done\n");
+#if 0
+	/* free the image buffer */
+	free(buffer);
+#endif
+	/* destroy the context */
+	OSMesaDestroyContext(ctx);
+	destroy_video_buffer(buffer);
+
+	return 0;
+}