From adbff7e977c7c768e752a24fb643d68bdf961bfe Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 22 Apr 2005 21:09:39 +0000
Subject: initial EGL code

---
 src/egl/main/eglmode.c | 130 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 src/egl/main/eglmode.c

(limited to 'src/egl/main/eglmode.c')

diff --git a/src/egl/main/eglmode.c b/src/egl/main/eglmode.c
new file mode 100644
index 0000000000..201ddb17f7
--- /dev/null
+++ b/src/egl/main/eglmode.c
@@ -0,0 +1,130 @@
+#include "egldisplay.h"
+#include "egldriver.h"
+#include "eglmode.h"
+#include "eglglobals.h"
+#include "eglscreen.h"
+
+
+#define MIN2(A, B)  (((A) < (B)) ? (A) : (B))
+
+
+_EGLMode *
+_eglLookupMode(EGLDisplay dpy, EGLModeMESA mode)
+{
+   const _EGLDisplay *disp = _eglLookupDisplay(dpy);
+   EGLint scrnum;
+
+   for (scrnum = 0; scrnum < disp->NumScreens; scrnum++) {
+      const _EGLScreen *scrn = disp->Screens + scrnum;
+      EGLint i;
+      for (i = 0; i < scrn->NumModes; i++) {
+         if (scrn->Modes[i].Handle == mode) {
+            return scrn->Modes + i;
+         }
+      }
+   }
+   return NULL;
+}
+
+
+/**
+ * Search for the EGLMode that best matches the given attribute list.
+ */
+EGLBoolean
+_eglChooseModeMESA(_EGLDriver *drv, EGLDisplay dpy, EGLint screen_number,
+                   const EGLint *attrib_list, EGLModeMESA *modes,
+                   EGLint modes_size, EGLint *num_modes)
+{
+   EGLint i;
+
+   /* XXX incomplete */
+
+   for (i = 0; attrib_list[i] != EGL_NONE; i++) {
+      switch (attrib_list[i]) {
+      case EGL_WIDTH:
+         i++;
+         break;
+      case EGL_HEIGHT:
+         i++;
+         break;
+      case EGL_REFRESH_RATE_MESA:
+         i++;
+         break;
+#if 0
+      case EGL_STEREO_MESA:
+         i++;
+         break;
+#endif
+      default:
+         _eglError(EGL_BAD_ATTRIBUTE, "eglChooseMode");
+         return EGL_FALSE;
+      }
+   }
+
+   return EGL_TRUE;
+}
+
+
+
+/**
+ * Return all possible modes for the given screen
+ */
+EGLBoolean
+_eglGetModesMESA(_EGLDriver *drv, EGLDisplay dpy, EGLint screen_number,
+                 EGLModeMESA *modes, EGLint modes_size, EGLint *num_modes)
+{
+   _EGLScreen *scrn = _eglLookupScreen(dpy, screen_number);
+   EGLint i;
+
+   if (!scrn) {
+      _eglError(EGL_BAD_SCREEN_MESA, "eglGetModes");
+      return EGL_FALSE;
+   }
+
+   *num_modes = MIN2(modes_size, scrn->NumModes);
+   for (i = 0; i < *num_modes; i++) {
+      modes[i] = scrn->Modes[i].Handle;
+   }
+
+   return EGL_TRUE;
+}
+
+
+/**
+ * Query an attribute of a mode.
+ */
+EGLBoolean
+_eglGetModeAttribMESA(_EGLDriver *drv, EGLDisplay dpy,
+                      EGLModeMESA mode, EGLint attribute, EGLint *value)
+{
+   _EGLMode *m = _eglLookupMode(dpy, mode);
+
+   switch (attribute) {
+   case EGL_MODE_ID_MESA:
+      *value = m->Handle;
+      break;
+   case EGL_WIDTH:
+      *value = m->Width;
+      break;
+   case EGL_HEIGHT:
+      *value = m->Height;
+      break;
+#if 0
+   case EGL_DEPTH_MESA:
+      *value = m->Depth;
+      break;
+#endif
+   case EGL_REFRESH_RATE_MESA:
+      *value = m->RefreshRate;
+      break;
+#if 0
+   case EGL_STEREO_MESA:
+      *value = m->Stereo;
+      break;
+#endif
+   default:
+      _eglError(EGL_BAD_ATTRIBUTE, "eglGetModeAttrib");
+      return EGL_FALSE;
+   }
+   return EGL_TRUE;
+}
-- 
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