1 /* 2 Copyright 1999, Be Incorporated. All Rights Reserved. 3 This file may be used under the terms of the Be Sample Code License. 4 5 Other authors: 6 Rudolf Cornelissen 4/2003-1/2006 7 */ 8 9 #define MODULE_BIT 0x02000000 10 11 #include "acc_std.h" 12 13 /* 14 Return the current display mode. The only time you might return an 15 error is if a mode hasn't been set. Or if the system hands you a NULL pointer. 16 */ 17 status_t GET_DISPLAY_MODE(display_mode *current_mode) 18 { 19 /* check for NULL pointer */ 20 if (current_mode == NULL) return B_ERROR; 21 22 *current_mode = si->dm; 23 return B_OK; 24 } 25 26 /* Return the frame buffer configuration information. */ 27 status_t GET_FRAME_BUFFER_CONFIG(frame_buffer_config *afb) 28 { 29 /* check for NULL pointer */ 30 if (afb == NULL) return B_ERROR; 31 32 *afb = si->fbc; 33 return B_OK; 34 } 35 36 /* Return the maximum and minium pixelclock limits for the specified mode. */ 37 status_t GET_PIXEL_CLOCK_LIMITS(display_mode *dm, uint32 *low, uint32 *high) 38 { 39 uint32 max_pclk = 0; 40 uint32 min_pclk = 0; 41 42 /* check for NULL pointers */ 43 if ((dm == NULL) || (low == NULL) || (high == NULL)) return B_ERROR; 44 45 /* specify requested info assuming CRT-only mode 46 * (if panel is active, CRTC and pixelclock are not programmed!) */ 47 { 48 /* find min. value */ 49 switch (si->ps.card_type) 50 { 51 default: 52 *low = (si->ps.min_pixel_vco * 1000); 53 break; 54 } 55 /* find max. value */ 56 switch (dm->space) 57 { 58 case B_CMAP8: 59 max_pclk = si->ps.max_dac1_clock_8; 60 break; 61 case B_RGB15_LITTLE: 62 case B_RGB16_LITTLE: 63 max_pclk = si->ps.max_dac1_clock_16; 64 break; 65 case B_RGB24_LITTLE: 66 max_pclk = si->ps.max_dac1_clock_24; 67 break; 68 default: 69 /* use fail-safe value */ 70 max_pclk = si->ps.max_dac1_clock_24; 71 break; 72 } 73 /* return values in kHz */ 74 *high = max_pclk * 1000; 75 } 76 77 /* clamp lower limit to 48Hz vertical refresh for now. 78 * Apparantly the BeOS screenprefs app does limit the upper refreshrate to 90Hz, 79 * while it does not limit the lower refreshrate. */ 80 min_pclk = ((uint32)dm->timing.h_total * (uint32)dm->timing.v_total * 48) / 1000; 81 if (min_pclk > *low) *low = min_pclk; 82 83 return B_OK; 84 } 85 86 /* Return the semaphore id that will be used to signal a vertical sync occured. */ 87 sem_id ACCELERANT_RETRACE_SEMAPHORE(void) 88 { 89 if (si->ps.int_assigned) 90 // return si->vblank; 91 //temp: 92 return B_ERROR; 93 else 94 return B_ERROR; 95 } 96