rubber band in platform-specific code

[retroray] / src / modern / main.c

diff --git a/src/modern/main.c b/src/modern/main.c
index bc002ac..5c90787 100644 (file)
--- a/src/modern/main.c
+++ b/src/modern/main.c
@@ -20,6 +20,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <assert.h>
 #include "miniglut.h"
 #include "app.h"
+#include "rtk.h"
 #include "logger.h"
 
 static void display(void);
@@ -45,6 +46,7 @@ static void (*glx_swap_interval_sgi)();
 static PROC wgl_swap_interval_ext;
 #endif
 
+static rtk_rect rband;
 
 
 int main(int argc, char **argv)
@@ -101,17 +103,17 @@ long app_getmsec(void)
 
 void app_redisplay(int x, int y, int w, int h)
 {
-       dbgmsg("fakeupd: %d,%d (%dx%d)\n", x, y, w, h);
+       /*dbgmsg("fakeupd: %d,%d (%dx%d)\n", x, y, w, h);*/
        glutPostRedisplay();
 }
 
 void app_swap_buffers(void)
 {
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();
-       glMatrixMode(GL_MODELVIEW);
-       glLoadIdentity();
 
        glRasterPos2i(-1, 1);
        glPixelZoom(1, -1);
@@ -120,7 +122,27 @@ void app_swap_buffers(void)
        glDrawPixels(win_width, win_height, GL_BGRA, GL_UNSIGNED_BYTE, framebuf);
        glDisable(GL_ALPHA_TEST);
 
-       glMatrixMode(GL_PROJECTION);
+       if(rband.width | rband.height) {
+               glOrtho(0, win_width, win_height, 0, -1, 1);
+
+               glPushAttrib(GL_ENABLE_BIT);
+               glDisable(GL_DEPTH_TEST);
+               glDisable(GL_LIGHTING);
+
+               glEnable(GL_COLOR_LOGIC_OP);
+               glLogicOp(GL_XOR);
+
+               glBegin(GL_LINE_LOOP);
+               glColor3f(1, 1, 1);
+               glVertex2f(rband.x, rband.y);
+               glVertex2f(rband.x + rband.width, rband.y);
+               glVertex2f(rband.x + rband.width, rband.y + rband.height);
+               glVertex2f(rband.x, rband.y + rband.height);
+               glEnd();
+
+               glPopAttrib();
+       }
+
        glPopMatrix();
        glMatrixMode(GL_MODELVIEW);
 
@@ -180,6 +202,16 @@ void app_vsync(int vsync)
 }
 #endif
 
+void app_rband(int x, int y, int w, int h)
+{
+       rband.x = x;
+       rband.y = y;
+       rband.width = w;
+       rband.height = h;
+
+       glutPostRedisplay();
+}
+
 
 static void display(void)
 {