- example app: parse <max_frames_sec> and <max_gfx_cpu_pct>

from project-specific prefs.  This gives the user a couple
        of ways of limiting CPU usage for graphics.
    - example app: define APP_GRAPHICS in project file, not source

svn path=/trunk/boinc_samples/; revision=14636

checkin_notes

@@ -512,8 +512,18 @@ Charlie 28 Nov 2007
         UpperCase2.xcodeproj/
             project.pbxproj
 
-David  6 Jan 2007
+David  6 Jan 2008
     - small bug fix
 
     wrapper/
         wrapper.C
+
+David  28 Jan 2008
+    - example app: parse <max_frames_sec> and <max_gfx_cpu_pct>
+        from project-specific prefs.  This gives the user a couple
+        of ways of limiting CPU usage for graphics.
+    - example app: define APP_GRAPHICS in project file, not source
+
+    example_app/
+        uc2.C
+        uc2_graphics.C

example_app/uc2.C

@@ -17,19 +17,21 @@
 // or write to the Free Software Foundation, Inc.,
 // 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
+// This program serves as both
+// - An example BOINC application, illustrating the use of the BOINC API
+// - A program for testing various features of BOINC
+//
 // NOTE: this file exists as both
 // boinc/apps/upper_case.C
 // and
 // boinc_samples/example_app/uc2.C
 // If you update one, please update the other!
 
-// This is the primary sample BOINC application;
-// it shows most of the features of the BOINC API.
-//
+// The program converts a mixed-case file to upper case:
 // read "in", convert to upper case, write to "out"
 //
-// command line options (use for debugging various scenarios):
-// -run_slow: sleep 1 second after each character; useful for debugging
+// command line options
+// -run_slow: sleep 1 second after each character
 // -cpu_time N: use about N CPU seconds after copying files
 // -early_exit: exit(10) after 30 chars
 // -early_crash: crash after 30 chars
@@ -55,8 +57,6 @@
 #include "mfile.h"
 #include "graphics2.h"
 
-#define APP_GRAPHICS
-
 #ifdef APP_GRAPHICS
 #include "uc2.h"
 UC_SHMEM* shmem;
@@ -93,16 +93,12 @@ int do_checkpoint(MFILE& mf, int nchars) {
     fprintf(f, "%d", nchars);
     fclose(f);
 
-    fprintf(stderr, "APP: upper_case checkpointing\n");
-
     retval = mf.flush();
     if (retval) return retval;
     boinc_resolve_filename_s(CHECKPOINT_FILE, resolved_name);
     retval = boinc_rename("temp", resolved_name.c_str());
     if (retval) return retval;
 
-	//use_some_cpu();
-    fprintf(stderr, "APP: upper_case checkpoint done\n");
     return 0;
 }
 

example_app/uc2_graphics.C

@@ -49,6 +49,8 @@ bool mouse_down = false;
 int mouse_x, mouse_y;
 double pitch_angle, roll_angle, viewpoint_distance=10;
 float color[4] = {.7, .2, .5, 1};
+    // the color of the 3D object.
+    // Can be changed using preferences
 UC_SHMEM* shmem = NULL;
 
 // set up lighting model
@@ -234,6 +236,7 @@ static void parse_project_prefs(char* buf) {
     char cs[256];
     COLOR c;
     double hue;
+    double max_frames_sec, max_gfx_cpu_pct;
     if (!buf) return;
     if (parse_str(buf, "<color_scheme>", cs, 256)) {
         if (!strcmp(cs, "Tahiti Sunset")) {
@@ -249,6 +252,12 @@ static void parse_project_prefs(char* buf) {
         color[2] = c.b;
         color[3] = 1;
     }
+    if (parse_double(buf, "<max_frames_sec>", max_frames_sec)) {
+        boinc_max_fps = max_frames_sec;
+    }
+    if (parse_double(buf, "<max_gfx_cpu_pct>", max_gfx_cpu_pct)) {
+        boinc_max_gfx_cpu_frac = max_gfx_cpu_pct/100;
+    }
 }
 
 int main(int argc, char** argv) {

win_build/uc2.vcproj

@@ -53,7 +53,7 @@
 				InlineFunctionExpansion="1"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories=".;../../boinc;../../boinc/api;../../boinc/lib;../image_libs;../jpeglib;../glut"
-				PreprocessorDefinitions="WIN32;NDEBUG;_MT;_CONSOLE"
+				PreprocessorDefinitions="WIN32;NDEBUG;_MT;_CONSOLE;APP_GRAPHICS"
 				StringPooling="false"
 				RuntimeLibrary="0"
 				EnableFunctionLevelLinking="true"