99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
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/*
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* resolution-set --
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*
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* A sample for implementing the "Fit Guest" functionality in VMware
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* products. This functionality is actually a collaboration between
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* VMware Tools (in userlevel) and the video driver. So this isn't
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* how you'd normally implement it in a real operating system- but
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* for example and testing purposes, it's handy to show how a minimal
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* version of this functionality could be implemented.
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*
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* For a more comprehensive example of the VMware Tools protocol, see
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* the open-vm-tools project.
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*/
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#include "intr.h"
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#include "vmbackdoor.h"
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#include "timer.h"
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#include "svga.h"
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void
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sendCapabilities(void)
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{
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VMBackdoor_RPCString("tools.capability.resolution_set 1");
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VMBackdoor_RPCString("tools.capability.resolution_server toolbox 1");
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VMBackdoor_RPCString("tools.capability.display_topology_set 1");
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VMBackdoor_RPCString("tools.capability.color_depth_set 1");
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VMBackdoor_RPCString("tools.capability.resolution_min 0 0");
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VMBackdoor_RPCString("tools.capability.unity 1");
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}
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void
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resize(int width, int height)
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{
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/*
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* To make it obvious that we're switching modes, alternate colors
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* each time.
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*/
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static uint32 color = 0x888888;
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color ^= 0x004000;
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SVGA_SyncToFence(SVGA_InsertFence());
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SVGA_SetMode(width, height, 32);
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memset32(gSVGA.fbMem, color, width * height);
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SVGA_Update(0, 0, width, height);
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}
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int
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main(void)
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{
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static VMTCLOState tclo;
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Bool resendCapabilities = FALSE;
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Intr_Init();
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Intr_SetFaultHandlers(SVGA_DefaultFaultHandler);
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SVGA_Init();
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SVGA_SetMode(640, 480, 32);
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/* Use the PIT to set TCLO polling rate. */
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Timer_InitPIT(PIT_HZ / 30);
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Intr_SetMask(0, TRUE);
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sendCapabilities();
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while (1) {
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Intr_Halt();
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if (!VMBackdoor_PollTCLO(&tclo, FALSE)) {
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if (resendCapabilities) {
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resendCapabilities = FALSE;
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sendCapabilities();
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}
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continue;
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}
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if (VMBackdoor_CheckPrefixTCLO(&tclo, "Capabilities_Register")) {
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/* Send the capabilities after we get a chance to send the reply. */
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resendCapabilities = TRUE;
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VMBackdoor_ReplyTCLO(&tclo, TCLO_SUCCESS);
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} else if (VMBackdoor_CheckPrefixTCLO(&tclo, "Resolution_Set")) {
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int width = VMBackdoor_IntParamTCLO(&tclo, 1);
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int height = VMBackdoor_IntParamTCLO(&tclo, 2);
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resize(width, height);
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VMBackdoor_ReplyTCLO(&tclo, TCLO_SUCCESS);
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} else {
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/* Unknown command */
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VMBackdoor_ReplyTCLO(&tclo, TCLO_UNKNOWN_CMD);
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}
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}
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return 0;
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}
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