empty implementation for drm video engine

src/newgal/drm/Makefile.am

@@ -0,0 +1,18 @@
+
+## Makefile.am for the drm video driver
+AM_CPPFLAGS = -I$(abs_top_srcdir)/src/include -I$(abs_top_srcdir)/include -I$(abs_top_srcdir)/src/newgal/
+
+noinst_LTLIBRARIES = libvideo_drm.la
+
+# The drm video driver sources
+SRC_FILES = \
+    drmvideo.c
+
+HDR_FILES= \
+    drmvideo.h
+
+libvideo_drm_la_SOURCES = $(SRC_FILES) $(HDR_FILES)
+
+EXTRA_DIST=makefile.ng
+
+LIB_NAME=libvideo_drm

src/newgal/drm/drmvideo.c

@@ -0,0 +1,211 @@
+/*
+ *   This file is part of MiniGUI, a mature cross-platform windowing
+ *   and Graphics User Interface (GUI) support system for embedded systems
+ *   and smart IoT devices.
+ *
+ *   Copyright (C) 2002~2018, Beijing FMSoft Technologies Co., Ltd.
+ *   Copyright (C) 1998~2002, WEI Yongming
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   Or,
+ *
+ *   As this program is a library, any link to this program must follow
+ *   GNU General Public License version 3 (GPLv3). If you cannot accept
+ *   GPLv3, you need to be licensed from FMSoft.
+ *
+ *   If you have got a commercial license of this program, please use it
+ *   under the terms and conditions of the commercial license.
+ *
+ *   For more information about the commercial license, please refer to
+ *   <http://www.minigui.com/en/about/licensing-policy/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+#include "newgal.h"
+#include "sysvideo.h"
+#include "pixels_c.h"
+
+#ifdef _MGGAL_DRM
+
+#include "drmvideo.h"
+
+#define DRMVID_DRIVER_NAME "drm"
+
+/* Initialization/Query functions */
+static int DRM_VideoInit(_THIS, GAL_PixelFormat *vformat);
+static GAL_Rect **DRM_ListModes(_THIS, GAL_PixelFormat *format, Uint32 flags);
+static GAL_Surface *DRM_SetVideoMode(_THIS, GAL_Surface *current, int width, int height, int bpp, Uint32 flags);
+static int DRM_SetColors(_THIS, int firstcolor, int ncolors, GAL_Color *colors);
+static void DRM_VideoQuit(_THIS);
+
+/* Hardware surface functions */
+static int DRM_AllocHWSurface(_THIS, GAL_Surface *surface);
+static void DRM_FreeHWSurface(_THIS, GAL_Surface *surface);
+
+/* DRM driver bootstrap functions */
+
+static int DRM_Available(void)
+{
+    return(1);
+}
+
+static void DRM_DeleteDevice(GAL_VideoDevice *device)
+{
+    free(device->hidden);
+    free(device);
+}
+
+static GAL_VideoDevice *DRM_CreateDevice(int devindex)
+{
+    GAL_VideoDevice *device;
+
+    /* Initialize all variables that we clean on shutdown */
+    device = (GAL_VideoDevice *)malloc(sizeof(GAL_VideoDevice));
+    if ( device ) {
+        memset(device, 0, (sizeof *device));
+        device->hidden = (struct GAL_PrivateVideoData *)
+                malloc((sizeof *device->hidden));
+    }
+    if ( (device == NULL) || (device->hidden == NULL) ) {
+        GAL_OutOfMemory();
+        if ( device ) {
+            free(device);
+        }
+        return(0);
+    }
+    memset(device->hidden, 0, (sizeof *device->hidden));
+
+    /* Set the function pointers */
+    device->VideoInit = DRM_VideoInit;
+    device->ListModes = DRM_ListModes;
+    device->SetVideoMode = DRM_SetVideoMode;
+    device->SetColors = DRM_SetColors;
+    device->VideoQuit = DRM_VideoQuit;
+#ifndef _MGRM_THREADS
+    device->RequestHWSurface = NULL;
+#endif
+    device->AllocHWSurface = DRM_AllocHWSurface;
+    device->CheckHWBlit = NULL;
+    device->FillHWRect = NULL;
+    device->SetHWColorKey = NULL;
+    device->SetHWAlpha = NULL;
+    device->FreeHWSurface = DRM_FreeHWSurface;
+
+    device->free = DRM_DeleteDevice;
+
+    return device;
+}
+
+VideoBootStrap DRM_bootstrap = {
+    DRMVID_DRIVER_NAME, "Dummy video driver",
+    DRM_Available, DRM_CreateDevice
+};
+
+
+static int DRM_VideoInit(_THIS, GAL_PixelFormat *vformat)
+{
+    fprintf (stderr, "NEWGAL>DRM: Calling init method!\n");
+
+    /* Determine the screen depth (use default 8-bit depth) */
+    /* we change this during the GAL_SetVideoMode implementation... */
+    vformat->BitsPerPixel = 8;
+    vformat->BytesPerPixel = 1;
+
+    /* We're done! */
+    return(0);
+}
+
+static GAL_Rect **DRM_ListModes(_THIS, GAL_PixelFormat *format, Uint32 flags)
+{
+    if (format->BitsPerPixel < 8) {
+        return NULL;
+    }
+
+    return (GAL_Rect**) -1;
+}
+
+static GAL_Surface *DRM_SetVideoMode(_THIS, GAL_Surface *current,
+                int width, int height, int bpp, Uint32 flags)
+{
+    int pitch;
+
+    if (this->hidden->buffer) {
+        free (this->hidden->buffer);
+    }
+
+    pitch = width * ((bpp + 7) / 8);
+    pitch = (pitch + 3) & ~3;
+
+    this->hidden->buffer = malloc (pitch * height);
+    if (!this->hidden->buffer) {
+        fprintf (stderr, "NEWGAL>DRM: "
+                "Couldn't allocate buffer for requested mode\n");
+        return NULL;
+    }
+
+    memset (this->hidden->buffer, 0, pitch * height);
+
+    /* Allocate the new pixel format for the screen */
+    if (!GAL_ReallocFormat (current, bpp, 0, 0, 0, 0)) {
+        free(this->hidden->buffer);
+        this->hidden->buffer = NULL;
+        fprintf (stderr, "NEWGAL>DRM: "
+                "Couldn't allocate new pixel format for requested mode\n");
+        return(NULL);
+    }
+
+    /* Set up the new mode framebuffer */
+    current->flags = flags & GAL_FULLSCREEN;
+    this->hidden->w = current->w = width;
+    this->hidden->h = current->h = height;
+    current->pitch = pitch;
+    current->pixels = this->hidden->buffer;
+
+    /* We're done */
+    return(current);
+}
+
+/* We don't actually allow hardware surfaces other than the main one */
+static int DRM_AllocHWSurface(_THIS, GAL_Surface *surface)
+{
+    return(-1);
+}
+static void DRM_FreeHWSurface(_THIS, GAL_Surface *surface)
+{
+    surface->pixels = NULL;
+}
+
+static int DRM_SetColors(_THIS, int firstcolor, int ncolors, GAL_Color *colors)
+{
+    /* do nothing of note. */
+    return(1);
+}
+
+/* Note:  If we are terminated, this could be called in the middle of
+   another video routine -- notably UpdateRects.
+*/
+static void DRM_VideoQuit(_THIS)
+{
+    if (this->screen->pixels != NULL) {
+        free(this->screen->pixels);
+        this->screen->pixels = NULL;
+    }
+}
+
+#endif /* _MGGAL_DRM */

src/newgal/drm/drmvideo.h

@@ -0,0 +1,49 @@
+/*
+ *   This file is part of MiniGUI, a mature cross-platform windowing
+ *   and Graphics User Interface (GUI) support system for embedded systems
+ *   and smart IoT devices.
+ *
+ *   Copyright (C) 2019, Beijing FMSoft Technologies Co., Ltd.
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *   Or,
+ *
+ *   As this program is a library, any link to this program must follow
+ *   GNU General Public License version 3 (GPLv3). If you cannot accept
+ *   GPLv3, you need to be licensed from FMSoft.
+ *
+ *   If you have got a commercial license of this program, please use it
+ *   under the terms and conditions of the commercial license.
+ *
+ *   For more information about the commercial license, please refer to
+ *   <http://www.minigui.com/en/about/licensing-policy/>.
+ */
+
+#ifndef _NEWGAL_DRMVIDEO_H
+#define _NEWGAL_DRMVIDEO_H
+
+#include "sysvideo.h"
+
+/* Hidden "this" pointer for the video functions */
+#define _THIS	GAL_VideoDevice *this
+
+/* Private display data */
+
+struct GAL_PrivateVideoData {
+    int w, h;
+    void *buffer;
+};
+
+#endif /* _NEWGAL_DRMVIDEO_H */

src/newgal/drm/makefile.ng

@@ -0,0 +1,5 @@
+abs_top_srcdir=../../..
+
+include Makefile.am
+include ../../../rules.make
+