59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <lib/fb.h>
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#include <drivers/vbe.h>
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#include <drivers/gop.h>
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#include <mm/pmm.h>
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void fb_init(struct fb_info **ret, size_t *_fbs_count,
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uint64_t target_width, uint64_t target_height, uint16_t target_bpp) {
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#if defined (BIOS)
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*ret = ext_mem_alloc(sizeof(struct fb_info));
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if (init_vbe(*ret, target_width, target_height, target_bpp)) {
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*_fbs_count = 1;
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(*ret)->edid = get_edid_info();
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size_t mode_count;
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(*ret)->mode_list = vbe_get_mode_list(&mode_count);
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(*ret)->mode_count = mode_count;
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} else {
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*_fbs_count = 0;
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pmm_free(*ret, sizeof(struct fb_info));
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}
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#elif defined (UEFI)
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init_gop(ret, _fbs_count, target_width, target_height, target_bpp);
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#endif
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}
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void fb_clear(struct fb_info *fb) {
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for (size_t y = 0; y < fb->framebuffer_height; y++) {
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switch (fb->framebuffer_bpp) {
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case 32: {
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uint32_t *fbp = (void *)(uintptr_t)fb->framebuffer_addr;
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size_t row = (y * fb->framebuffer_pitch) / 4;
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for (size_t x = 0; x < fb->framebuffer_width; x++) {
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fbp[row + x] = 0;
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}
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break;
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}
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case 16: {
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uint16_t *fbp = (void *)(uintptr_t)fb->framebuffer_addr;
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size_t row = (y * fb->framebuffer_pitch) / 2;
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for (size_t x = 0; x < fb->framebuffer_width; x++) {
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fbp[row + x] = 0;
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}
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break;
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}
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default: {
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uint8_t *fbp = (void *)(uintptr_t)fb->framebuffer_addr;
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size_t row = y * fb->framebuffer_pitch;
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for (size_t x = 0; x < fb->framebuffer_width * fb->framebuffer_bpp; x++) {
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fbp[row + x] = 0;
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}
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break;
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}
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}
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}
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}
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