sdk: an attempt to create GL-based blitter

git-svn-id: svn://kolibrios.org@4464 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-01-17 06:04:33 +00:00
parent 54686106c2
commit 5fd1f58066
2 changed files with 273 additions and 0 deletions
--- a/contrib/sdk/samples/Mesa/gl-render/gl-render.c
+++ b/contrib/sdk/samples/Mesa/gl-render/gl-render.c
@@ -0,0 +1,113 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#define EGL_EGLEXT_PROTOTYPES
+#include "EGL/egl.h"
+#include "EGL/eglext.h"
+#include "GL/gl.h"
+#include "gbm.h"
+#include <kos32sys.h>
+
+#include "eglut.h"
+
+GLint list;
+
+static void init(void)
+{
+//   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+//   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+//   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+//   fflush(stderr);
+
+   list = glGenLists(1);
+   glNewList(list, GL_COMPILE);
+
+   /* XXX: this state-change will only be executed if list is called
+    * from outside a begin/end pair:
+    */
+   glShadeModel( GL_FLAT );
+   glBegin(GL_TRIANGLES);
+   glColor3f(0,0,0.7);
+   glVertex3f( -0.9,  0.9, -30.0);
+   glColor3f(0,0.9,0);
+   glVertex3f( -0.9, -0.9, -30.0);
+   glColor3f(0.8,0,0);
+   glVertex3f(  0.9,  0.0, -30.0);
+   glEnd();
+
+   glEndList();
+}
+
+static void
+idle(void)
+{
+    eglutPostRedisplay();
+}
+
+static void reshape(int width, int height)
+{
+  asm volatile ("int3");
+/*
+    glViewport(0, 0, (GLint)width, (GLint)height);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 100.0);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+*/
+    glViewport(0, 0, (GLint) width, (GLint) height);
+
+    GLfloat h = (GLfloat) height / (GLfloat) width;
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+}
+
+static void draw(void)
+{
+   asm volatile ("int3");
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glShadeModel( GL_SMOOTH );
+
+   glBegin(GL_TRIANGLES);
+
+   /* Note: call the list from inside a begin/end pair.  The end is
+    * provided by the display list...
+    */
+   glCallList(list);
+
+ //  glFlush();
+
+}
+
+int
+main(int argc, char *argv[])
+{
+   eglutInitWindowSize(384, 384);
+   eglutInitAPIMask(EGLUT_OPENGL_BIT);
+   eglutInit(argc, argv);
+
+   eglutCreateWindow("gl-render");
+
+   eglutIdleFunc(idle);
+   eglutReshapeFunc(reshape);
+   eglutDisplayFunc(draw);
+
+   glClearColor( 0, 0, 0, 1.0);
+
+   init();
+   glDrawBuffer(GL_BACK);
+
+   eglutMainLoop();
+
+   return 0;
+}