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#include <lib.h>
#include <comus/drivers/gpu.h>
#include <comus/drivers/gpu/gop.h>
#include <comus/drivers/gpu/bochs.h>
#include <comus/drivers/gpu/vga_text.h>
#include <comus/error.h>
#include <comus/term.h>
#include <comus/asm.h>
struct gpu_dev *gpu_dev = NULL;
int gpu_init(void)
{
// try to get a gpu device
if (gpu_dev == NULL)
gop_init(&gpu_dev);
if (gpu_dev == NULL)
bochs_init(&gpu_dev);
// if we did (yay!) resize terminal
if (gpu_dev)
term_resize(gpu_dev->width / en_font.width,
gpu_dev->height / en_font.height);
return gpu_dev != NULL;
}
void gpu_set_pixel(uint32_t x, uint32_t y, uint32_t r, uint32_t g, uint32_t b)
{
if (gpu_dev == NULL)
return;
x %= gpu_dev->width;
y %= gpu_dev->height;
// TODO: handle other bpp
volatile uint32_t *fb = (volatile uint32_t *)gpu_dev->framebuffer;
int offset = y * gpu_dev->width + x;
fb[offset] = (b << 0) | (g << 8) | (r << 16);
}
void gpu_draw_char(char c, uint16_t cx, uint16_t cy)
{
if (gpu_dev == NULL) {
vga_text_draw_char(c, cx, cy);
return;
}
uint32_t sx = en_font.width * cx;
uint32_t sy = en_font.height * cy;
uint8_t *glyph = &en_font.data[en_font.glyph_size * c];
for (uint32_t i = 0; i < en_font.width; i++) {
for (uint32_t j = 0; j < en_font.height; j++) {
uint32_t x = sx + (en_font.width - i - 1);
uint32_t y = sy + j;
uint32_t bitoff = i + j * en_font.width;
uint32_t byteoff = bitoff / 8;
uint32_t bitshift = bitoff % 8;
uint32_t color = ((glyph[byteoff] >> bitshift) & 0x1) * 255;
gpu_set_pixel(x, y, color, color, color);
}
}
}
void gpu_report(void)
{
if (gpu_dev == NULL)
return;
kprintf("GPU (%s)\n", gpu_dev->name);
kprintf("Width: %d\n", gpu_dev->width);
kprintf("Height: %d\n", gpu_dev->height);
kprintf("Bit depth: %d\n\n", gpu_dev->bit_depth);
}
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