Graphics: Moved VBE/VESA driver to drivers folder
This commit is contained in:
136
src/kernel/drivers/vesa/vesa.cpp
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136
src/kernel/drivers/vesa/vesa.cpp
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#include "vesa.h"
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VbeInfoBlock* vbeInfo;
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vbe_mode_info_structure* VbeModeInfo;
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void initVBEDevice(multiboot_info_t* mbt){
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print_serial("initVBEDevice");
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vbeInfo = (VbeInfoBlock*) mbt->vbe_control_info;
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printf_serial("Signature: %s, V0x%x\n", vbeInfo->VbeSignature, vbeInfo->VbeVersion);
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VbeModeInfo = (vbe_mode_info_structure*) mbt->vbe_mode_info;
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printf_serial("VESA video mode info: Width: %d Height: %d BPP: %d\n", VbeModeInfo->width, VbeModeInfo->height , VbeModeInfo->bpp);
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printf_serial("VideoMemory Location: 0x%x \n", VbeModeInfo->framebuffer );
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}
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void putPixel( int x, int y , uint32_t colour){
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// printf_serial("putPixel x: %d, y: %d\n", x, y);
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///fb + mbt->framebuffer_pitch * y + 4 * x ,NOTE: this calculation is very important
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*(uint32_t*) ( VbeModeInfo->framebuffer + VbeModeInfo->pitch * y + 4 * x ) = colour;
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}
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void drawLine(int x1, int y1, int x2, int y2, uint32_t colour ){
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print_serial("drawline\n");
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// See Bresenham's line algorithm
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int deltaX = x2 - x1;
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int deltaY = y2 - y1;
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int D = 2 * deltaY - deltaX;
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int y = y1;
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for ( int x = x1; x < x2; x++){
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putPixel(x,y, colour);
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if( D > 0){
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y +=1;
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D = D - 2 * deltaX;
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}
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D = D + 2 * deltaY;
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}
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}
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void drawRect ( int x, int y, int width, int height, uint32_t colour ){
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print_serial("drawRect\n");
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for ( int i = x; i < x + width; i ++)
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{
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for(int j = y; j < y + height; j++){
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putPixel(i,j, colour);
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}
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}
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}
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void blueDiagnalLineTest(multiboot_info_t* mbt){
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multiboot_uint32_t color;
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unsigned i;
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void *fb = (void *) (unsigned long) mbt->framebuffer_addr;
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switch (mbt->framebuffer_type)
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{
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case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
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{
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unsigned best_distance, distance;
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struct multiboot_color *palette;
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palette = (struct multiboot_color *) mbt->framebuffer_palette_addr;
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color = 0;
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best_distance = 4*256*256;
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for (i = 0; i < mbt->framebuffer_palette_num_colors; i++)
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{
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distance = (0xff - palette[i].blue) * (0xff - palette[i].blue)
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+ palette[i].red * palette[i].red
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+ palette[i].green * palette[i].green;
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if (distance < best_distance)
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{
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color = i;
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best_distance = distance;
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}
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}
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}
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break;
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case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
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color = ((1 << mbt->framebuffer_blue_mask_size) - 1)
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<< mbt->framebuffer_blue_field_position;
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break;
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case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
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color = '\\' | 0x0100;
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break;
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default:
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color = 0xffffffff;
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break;
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}
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for (i = 0; i < mbt->framebuffer_width
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&& i < mbt->framebuffer_height; i++)
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{
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switch (mbt->framebuffer_bpp)
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{
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case 8:
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{
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multiboot_uint8_t *pixel = (multiboot_uint8_t*)fb + mbt->framebuffer_pitch * i + i;
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*pixel = color;
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}
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break;
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case 15:
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case 16:
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{
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multiboot_uint16_t *pixel
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= (multiboot_uint16_t*)fb + mbt->framebuffer_pitch * i + 2 * i;
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*pixel = color;
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}
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break;
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case 24:
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{
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multiboot_uint32_t *pixel
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= (multiboot_uint32_t*)fb + mbt->framebuffer_pitch * i + 3 * i;
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*pixel = (color & 0xffffff) | (*pixel & 0xff000000);
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}
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break;
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case 32:
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{
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multiboot_uint32_t *pixel
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= (multiboot_uint32_t*)fb + mbt->framebuffer_pitch * i + 4 * i;
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*pixel = color;
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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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66
src/kernel/drivers/vesa/vesa.h
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66
src/kernel/drivers/vesa/vesa.h
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@ -0,0 +1,66 @@
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#pragma once
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#include <stdint.h>
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#include "../../bootloader/multiboot.h"
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#include "../../serial.h"
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struct vbe_mode_info_structure{
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uint16_t attributes;
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uint8_t window_a;
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uint8_t window_b;
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uint16_t granularity;
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uint16_t window_size;
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uint16_t segment_a;
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uint16_t segment_b;
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uint32_t win_func_ptr;
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uint16_t pitch;
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uint16_t width;
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uint16_t height;
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uint8_t w_char;
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uint8_t y_char;
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uint8_t planes;
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uint8_t bpp;
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uint8_t banks;
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uint8_t memory_model;
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uint8_t bank_size;
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uint8_t image_pages;
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uint8_t reserved0;
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uint8_t red_mask;
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uint8_t red_position;
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uint8_t green_mask;
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uint8_t green_position;
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uint8_t blue_mask;
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uint8_t blue_position;
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uint8_t reserved_mask;
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uint8_t reserved_position;
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uint8_t direct_color_attributes;
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uint32_t framebuffer;
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uint32_t off_screen_mem_off;
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uint16_t off_screen_mem_size;
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uint8_t reserved1[206];
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}__attribute__((packed));
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struct VbeInfoBlock {
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char VbeSignature[4];
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uint16_t VbeVersion;
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uint16_t OemStringPtr;
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uint8_t Capabilities;
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uint16_t VideoModePtr;
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uint16_t TotalMemory;
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}__attribute__((packed));
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extern VbeInfoBlock* vbeInfo;
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extern vbe_mode_info_structure* VbeModeInfo;
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void initVBEDevice(multiboot_info_t* mbt);
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void blueDiagnalLineTest(multiboot_info_t* mbt);
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// Primitive drawing functions
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void putPixel( int x, int y , uint32_t colour);
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void drawLine(int x1, int y1, int x2, int y2, uint32_t colour );
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void drawRect ( int x, int y, int width, int height, uint32_t colour );
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