quinn-os/doomgeneric
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Extra buffer to compensate for fbdev/doom resolution being different

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This commit is contained in:
Maxime Vincent 2016-05-23 16:02:22 +02:00
parent 019b22b7bd
commit 88e741c2f9
2 changed files with 28 additions and 35 deletions
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3
frosted-doom/g_game.c
View File

@ -2180,7 +2180,8 @@ void G_DoPlayDemo (void)
"/info/patches.php\n"
" This appears to be %s.";
I_Error(message, demoversion, G_VanillaVersionCode(),
//I_Error(message, demoversion, G_VanillaVersionCode(),
printf(message, demoversion, G_VanillaVersionCode(),
DemoVersionDescription(demoversion));
}

60
frosted-doom/i_video_fbdev.c
View File

@ -47,6 +47,11 @@ rcsid[] = "$Id: i_x.c,v 1.6 1997/02/03 22:45:10 b1 Exp $";
#include <sys/socket.h>
#include <sys/ioctl.h>
#define FB_WIDTH (480)
#define FB_HEIGHT (272)
#define FB_BPP_RGB565 (16)
struct color {
uint32_t b:8;
uint32_t g:8;
@ -59,6 +64,7 @@ static struct color colors[256];
// The screen buffer; this is modified to draw things to the screen
byte *I_VideoBuffer = NULL;
byte *I_VideoBuffer_FB = NULL;
/* framebuffer file descriptor */
int fd_fb = 0;
@ -154,18 +160,16 @@ void I_InitGraphics (void)
/* Allocate screen to draw to */
//screen_pixels = malloc(X_width * X_height);
//
I_VideoBuffer = (byte*)Z_Malloc (SCREENWIDTH * SCREENHEIGHT, PU_STATIC, NULL);
I_VideoBuffer = (byte*)Z_Malloc (SCREENWIDTH * SCREENHEIGHT, PU_STATIC, NULL); // For DOOM to draw on
I_VideoBuffer_FB = (byte*)Z_Malloc (FB_WIDTH * FB_HEIGHT, PU_STATIC, NULL); // For a single write() syscall to fbdev
screenvisible = true;
//screens[0] = (unsigned char *)screen_pixels;
//screens[0] = (unsigned char *)I_VideoBuffer;
}
void I_ShutdownGraphics (void)
{
Z_Free (I_VideoBuffer);
Z_Free (I_VideoBuffer_FB);
}
void I_StartFrame (void)
@ -355,49 +359,37 @@ void I_UpdateNoBlit (void)
//
// I_FinishUpdate
//
#define FB_WIDTH (480)
#define FB_HEIGHT (272)
#define FB_BPP_RGB565 (16)
void I_FinishUpdate (void)
{
//int x, y;
#define CMAP256
int y;
unsigned char *line_in;
//byte index;
//lcd_vsync = false;
//for (y = 0; y < SCREENHEIGHT; y++)
//{
// for (x = 0; x < SCREENWIDTH; x++)
// {
// index = I_VideoBuffer[y * SCREENWIDTH + x];
// ((uint16_t*)lcd_frame_buffer)[x * GFX_MAX_WIDTH + (GFX_MAX_WIDTH - y - 1)] = rgb565_palette[index];
// }
//}
//lcd_refresh ();
//lcd_vsync = true;
//
//
int x_offset, y_offset, x_offset_end;
unsigned char *line_in, *line_out;
/* Offsets in case FB is bigger than DOOM */
y_offset = (FB_HEIGHT - SCREENHEIGHT + 1) / 2;
x_offset = (FB_WIDTH - SCREENWIDTH + 1) / 2;
x_offset_end = (FB_WIDTH - SCREENWIDTH - x_offset);
/* DRAW SCREEN */
line_in = (unsigned char *) I_VideoBuffer;
lseek(fd_fb, 0, SEEK_SET);
y = SCREENHEIGHT;
line_in = (unsigned char *) I_VideoBuffer;
line_out = (unsigned char *) I_VideoBuffer_FB;
#define CMAP256
y = SCREENHEIGHT;
#ifdef CMAP256
while (y--)
{
write(fd_fb, line_in, FB_WIDTH); /* FB_WIDTH is bigger then Doom SCREENWIDTH... */
line_out += x_offset;
memcpy(line_out, line_in, SCREENWIDTH); /* FB_WIDTH is bigger than Doom SCREENWIDTH... */
line_in += SCREENWIDTH;
line_out += SCREENWIDTH + x_offset_end;
}
/* Start drawing from y-offset */
lseek(fd_fb, y_offset * FB_WIDTH, SEEK_SET);
write(fd_fb, I_VideoBuffer_FB, SCREENHEIGHT * FB_WIDTH); /* draw only portion used by doom + x-offsets */
#else
while (y--)
{