91 lines
No EOL
3.7 KiB
C
91 lines
No EOL
3.7 KiB
C
/*********************************************************************************/
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/* Module Name: framebuffer.c */
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/* Project: AurixOS */
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/* */
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/* Copyright (c) 2024-2025 Jozef Nagy */
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/* */
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/* This source is subject to the MIT License. */
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/* See License.txt in the root of this repository. */
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/* All other rights reserved. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
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/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
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/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
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/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
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/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
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/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */
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/* SOFTWARE. */
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/*********************************************************************************/
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#include <mm/mman.h>
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#include <ui/framebuffer.h>
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#include <print.h>
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#include <efi.h>
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#include <efilib.h>
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#include <stdint.h>
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#include <stddef.h>
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bool get_framebuffer(uint32_t **fb_addr, struct fb_mode **available_modes, int *total_modes, int *current_mode_index)
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{
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EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
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EFI_GRAPHICS_OUTPUT_PROTOCOL *gop = NULL;
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EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *mode_info = NULL;
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EFI_UINTN mode_info_size = sizeof(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION);
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EFI_UINTN SizeOfInfo;
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EFI_UINTN numModes = 0;
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EFI_UINTN nativeMode = 0;
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EFI_UINTN mode_index = 0;
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EFI_STATUS Status;
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Status = gBootServices->LocateProtocol(&gop_guid, NULL, (void**)&gop);
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if (EFI_ERROR(Status)) {
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log("get_framebuffer(): Unable to locate GOP: %s (0x%llx)\n", efi_status_to_str(Status), Status);
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}
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Status = gop->QueryMode(gop, gop->Mode == NULL ? 0 : gop->Mode->Mode, &SizeOfInfo, &mode_info);
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// this is needed to get the current video mode
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if (Status == EFI_NOT_STARTED) {
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Status = gop->SetMode(gop, 0);
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} else if (EFI_ERROR(Status)) {
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log("Unable to get native mode\n");
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return false;
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} else {
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nativeMode = gop->Mode->Mode;
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numModes = gop->Mode->MaxMode;
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}
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if (total_modes != NULL) {
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*total_modes = numModes;
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}
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*available_modes = (struct fb_mode *)mem_alloc(sizeof(struct fb_mode) * numModes);
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*fb_addr = (uint32_t *)gop->Mode->FrameBufferBase;
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// get all available modes
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for (int i = 0; i < (int)numModes; i++) {
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Status = gop->QueryMode(gop, i, &SizeOfInfo, &mode_info);
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(*available_modes)[i].width = mode_info->HorizontalResolution;
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(*available_modes)[i].height = mode_info->VerticalResolution;
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(*available_modes)[i].bpp = 4;
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(*available_modes)[i].pitch = mode_info->PixelsPerScanLine * 4;
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if (mode_info->PixelFormat == PixelRedGreenBlueReserved8BitPerColor) {
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(*available_modes)[i].format = FB_RGBA;
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} else if (mode_info->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
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(*available_modes)[i].format = FB_BGRA;
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} else {
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log("get_framebuffer(): Unknown framebuffer format, assuming BGRA...\n");
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(*available_modes)[i].format = FB_BGRA;
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}
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if (i == (int)nativeMode) {
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*current_mode_index = i;
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}
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}
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gop->QueryMode(gop, mode_index, &mode_info_size, &mode_info);
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return true;
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} |