This repository has been archived on 2025-05-24. You can view files and clone it, but cannot push or open issues or pull requests.
Files
VARCem/src/win/win_ddraw.cpp
waltje ba10374e46 Updated win_sdl.c to have screenshots (imported from 86Box.)
Updated png.ch to allow for flipped (DDraw) and regular (SDL) bitmaps.
2019-04-28 03:06:11 -05:00

764 lines
19 KiB
C++

/*
* VARCem Virtual ARchaeological Computer EMulator.
* An emulator of (mostly) x86-based PC systems and devices,
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
* spanning the era between 1981 and 1995.
*
* This file is part of the VARCem Project.
*
* Rendering module for Microsoft DirectDraw 9.
*
* Version: @(#)win_ddraw.cpp 1.0.20 2019/04/27
*
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
* Miran Grca, <mgrca8@gmail.com>
* Sarah Walker, <tommowalker@tommowalker.co.uk>
*
* Copyright 2017-2019 Fred N. van Kempen.
* Copyright 2016-2018 Miran Grca.
* Copyright 2008-2018 Sarah Walker.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the:
*
* Free Software Foundation, Inc.
* 59 Temple Place - Suite 330
* Boston, MA 02111-1307
* USA.
*/
#define UNICODE
#include <windows.h>
#include <ddraw.h>
#include <stdio.h>
#include <stdint.h>
#include "../emu.h"
#include "../device.h"
#include "../ui/ui.h"
#include "../plat.h"
#ifdef USE_LIBPNG
# include "../png.h"
#endif
#ifdef _MSC_VER
# pragma warning(disable: 4200)
#endif
#include "../devices/video/video.h"
#include "win.h"
static LPDIRECTDRAW4 lpdd4 = NULL;
static LPDIRECTDRAWSURFACE4 lpdds_pri = NULL,
lpdds_back = NULL,
lpdds_back2 = NULL;
static LPDIRECTDRAWCLIPPER lpdd_clipper = NULL;
static HWND ddraw_hwnd;
static int ddraw_w, ddraw_h,
xs, ys, ys2;
static const char *
GetError(HRESULT hr)
{
const char *err = "Unknown";
switch(hr) {
case DDERR_INCOMPATIBLEPRIMARY:
err = "Incompatible Primary";
break;
case DDERR_INVALIDCAPS:
err = "Invalid Caps";
break;
case DDERR_INVALIDOBJECT:
err = "Invalid Object";
break;
case DDERR_INVALIDPARAMS:
err = "Invalid Parameters";
break;
case DDERR_INVALIDPIXELFORMAT:
err = "Invalid Pixel Format";
break;
case DDERR_NOALPHAHW:
err = "Hardware does not support Alpha";
break;
case DDERR_NOCOOPERATIVELEVELSET:
err = "No cooperative level set";
break;
case DDERR_NODIRECTDRAWHW:
err = "Hardware does not support DirectDraw";
break;
case DDERR_NOEMULATION:
err = "No emulation";
break;
case DDERR_NOEXCLUSIVEMODE:
err = "No exclusive mode available";
break;
case DDERR_NOFLIPHW:
err = "Hardware does not support flipping";
break;
case DDERR_NOMIPMAPHW:
err = "Hardware does not support MipMap";
break;
case DDERR_NOOVERLAYHW:
err = "Hardware does not support overlays";
break;
case DDERR_NOZBUFFERHW:
err = "Hardware does not support Z buffers";
break;
case DDERR_OUTOFMEMORY:
err = "Out of memory";
break;
case DDERR_OUTOFVIDEOMEMORY:
err = "Out of video memory";
break;
case DDERR_PRIMARYSURFACEALREADYEXISTS:
err = "Primary Surface already exists";
break;
case DDERR_UNSUPPORTEDMODE:
err = "Mode not supported";
break;
default:
break;
}
return(err);
}
static void
ddraw_fs_size_default(RECT w_rect, RECT *r_dest)
{
r_dest->left = 0;
r_dest->top = 0;
r_dest->right = (w_rect.right - w_rect.left) - 1;
r_dest->bottom = (w_rect.bottom - w_rect.top) - 1;
}
static void
ddraw_fs_size(RECT w_rect, RECT *r_dest, int w, int h)
{
int ratio_w, ratio_h;
double hsr, gsr, ra, d;
switch (vid_fullscreen_scale) {
case FULLSCR_SCALE_FULL:
ddraw_fs_size_default(w_rect, r_dest);
break;
case FULLSCR_SCALE_43:
r_dest->top = 0;
r_dest->bottom = (w_rect.bottom - w_rect.top) - 1;
r_dest->left = ((w_rect.right - w_rect.left) / 2) - (((w_rect.bottom - w_rect.top) * 4) / (3 * 2));
r_dest->right = ((w_rect.right - w_rect.left) / 2) + (((w_rect.bottom - w_rect.top) * 4) / (3 * 2)) - 1;
if (r_dest->left < 0) {
r_dest->left = 0;
r_dest->right = (w_rect.right - w_rect.left) - 1;
r_dest->top = ((w_rect.bottom - w_rect.top) / 2) - (((w_rect.right - w_rect.left) * 3) / (4 * 2));
r_dest->bottom = ((w_rect.bottom - w_rect.top) / 2) + (((w_rect.right - w_rect.left) * 3) / (4 * 2)) - 1;
}
break;
case FULLSCR_SCALE_SQ:
r_dest->top = 0;
r_dest->bottom = (w_rect.bottom - w_rect.top) - 1;
r_dest->left = ((w_rect.right - w_rect.left) / 2) - (((w_rect.bottom - w_rect.top) * w) / (h * 2));
r_dest->right = ((w_rect.right - w_rect.left) / 2) + (((w_rect.bottom - w_rect.top) * w) / (h * 2)) - 1;
if (r_dest->left < 0) {
r_dest->left = 0;
r_dest->right = (w_rect.right - w_rect.left) - 1;
r_dest->top = ((w_rect.bottom - w_rect.top) / 2) - (((w_rect.right - w_rect.left) * h) / (w * 2));
r_dest->bottom = ((w_rect.bottom - w_rect.top) / 2) + (((w_rect.right - w_rect.left) * h) / (w * 2)) - 1;
}
break;
case FULLSCR_SCALE_INT:
ratio_w = (w_rect.right - w_rect.left) / w;
ratio_h = (w_rect.bottom - w_rect.top) / h;
if (ratio_h < ratio_w)
ratio_w = ratio_h;
r_dest->left = ((w_rect.right - w_rect.left) / 2) - ((w * ratio_w) / 2);
r_dest->right = ((w_rect.right - w_rect.left) / 2) + ((w * ratio_w) / 2) - 1;
r_dest->top = ((w_rect.bottom - w_rect.top) / 2) - ((h * ratio_w) / 2);
r_dest->bottom = ((w_rect.bottom - w_rect.top) / 2) + ((h * ratio_w) / 2) - 1;
break;
case FULLSCR_SCALE_KEEPRATIO:
hsr = ((double) (w_rect.right - w_rect.left)) / ((double) (w_rect.bottom - w_rect.top));
gsr = ((double) w) / ((double) h);
if (hsr > gsr) {
/* Host ratio is bigger than guest ratio. */
ra = ((double) (w_rect.bottom - w_rect.top)) / ((double) h);
d = ((double) w) * ra;
d = (((double) (w_rect.right - w_rect.left)) - d) / 2.0;
r_dest->left = ((int) d);
r_dest->right = (w_rect.right - w_rect.left) - ((int) d) - 1;
r_dest->top = 0;
r_dest->bottom = (w_rect.bottom - w_rect.top) - 1;
} else if (hsr < gsr) {
/* Host ratio is smaller or rqual than guest ratio. */
ra = ((double) (w_rect.right - w_rect.left)) / ((double) w);
d = ((double) h) * ra;
d = (((double) (w_rect.bottom - w_rect.top)) - d) / 2.0;
r_dest->left = 0;
r_dest->right = (w_rect.right - w_rect.left) - 1;
r_dest->top = ((int) d);
r_dest->bottom = (w_rect.bottom - w_rect.top) - ((int) d) - 1;
} else {
/* Host ratio is equal to guest ratio. */
ddraw_fs_size_default(w_rect, r_dest);
}
break;
}
}
static void
ddraw_blit_fs(bitmap_t *scr, int x, int y, int y1, int y2, int w, int h)
{
DDSURFACEDESC2 ddsd;
RECT r_src, r_dest, w_rect;
DDBLTFX ddbltfx;
HRESULT hr;
int yy;
if ((lpdds_back == NULL) || (y1 == y2) || (h <= 0)) {
video_blit_done();
return;
}
memset(&ddsd, 0, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
hr = lpdds_back->Lock(NULL, &ddsd,
DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL);
if (hr == DDERR_SURFACELOST) {
lpdds_back->Restore();
lpdds_back->Lock(NULL, &ddsd,
DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL);
device_force_redraw();
}
if (! ddsd.lpSurface) {
video_blit_done();
return;
}
for (yy = y1; yy < y2; yy++) {
if (scr) {
if (vid_grayscale || invert_display)
video_transform_copy((uint32_t *)((uintptr_t)ddsd.lpSurface + (yy * ddsd.lPitch)), &scr->line[y + yy][x], w);
else
memcpy((void *)((uintptr_t)ddsd.lpSurface + (yy * ddsd.lPitch)), &scr->line[y + yy][x], w * 4);
}
}
video_blit_done();
lpdds_back->Unlock(NULL);
w_rect.left = 0;
w_rect.top = 0;
w_rect.right = ddraw_w;
w_rect.bottom = ddraw_h;
ddraw_fs_size(w_rect, &r_dest, w, h);
r_src.left = 0;
r_src.top = 0;
r_src.right = w;
r_src.bottom = h;
ddbltfx.dwSize = sizeof(ddbltfx);
ddbltfx.dwFillColor = 0;
lpdds_back2->Blt(&w_rect, NULL, NULL,
DDBLT_WAIT | DDBLT_COLORFILL, &ddbltfx);
hr = lpdds_back2->Blt(&r_dest, lpdds_back, &r_src, DDBLT_WAIT, NULL);
if (hr == DDERR_SURFACELOST) {
lpdds_back2->Restore();
lpdds_back2->Blt(&r_dest, lpdds_back, &r_src, DDBLT_WAIT, NULL);
}
hr = lpdds_pri->Flip(NULL, DDFLIP_NOVSYNC);
if (hr == DDERR_SURFACELOST) {
lpdds_pri->Restore();
lpdds_pri->Flip(NULL, DDFLIP_NOVSYNC);
}
}
static void
ddraw_blit(bitmap_t *scr, int x, int y, int y1, int y2, int w, int h)
{
DDSURFACEDESC2 ddsd;
RECT r_src, r_dest;
HRESULT hr;
POINT po;
int yy;
if ((lpdds_back == NULL) || (y1 == y2) || (h <= 0)) {
video_blit_done();
return;
}
memset(&ddsd, 0, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
hr = lpdds_back->Lock(NULL, &ddsd,
DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL);
if (hr == DDERR_SURFACELOST) {
lpdds_back->Restore();
lpdds_back->Lock(NULL, &ddsd,
DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL);
device_force_redraw();
}
if (! ddsd.lpSurface) {
video_blit_done();
return;
}
for (yy = y1; yy < y2; yy++) {
if (scr) {
if ((y + yy) >= 0 && (y + yy) < scr->h) {
if (vid_grayscale || invert_display)
video_transform_copy((uint32_t *) &(((uint8_t *) ddsd.lpSurface)[yy * ddsd.lPitch]), &scr->line[y + yy][x], w);
else
memcpy((uint32_t *) &(((uint8_t *) ddsd.lpSurface)[yy * ddsd.lPitch]), &scr->line[y + yy][x], w * 4);
}
}
}
video_blit_done();
lpdds_back->Unlock(NULL);
po.x = po.y = 0;
ClientToScreen(ddraw_hwnd, &po);
GetClientRect(ddraw_hwnd, &r_dest);
OffsetRect(&r_dest, po.x, po.y);
r_src.left = 0;
r_src.top = 0;
r_src.right = w;
r_src.bottom = h;
hr = lpdds_back2->Blt(&r_src, lpdds_back, &r_src, DDBLT_WAIT, NULL);
if (hr == DDERR_SURFACELOST) {
lpdds_back2->Restore();
lpdds_back2->Blt(&r_src, lpdds_back, &r_src, DDBLT_WAIT, NULL);
}
lpdds_back2->Unlock(NULL);
hr = lpdds_pri->Blt(&r_dest, lpdds_back2, &r_src, DDBLT_WAIT, NULL);
if (hr == DDERR_SURFACELOST) {
lpdds_pri->Restore();
lpdds_pri->Blt(&r_dest, lpdds_back2, &r_src, DDBLT_WAIT, NULL);
}
}
static void
ddraw_close(void)
{
DEBUG("DDRAW: close\n");
video_blit_set(NULL);
if (lpdds_back2 != NULL) {
lpdds_back2->Release();
lpdds_back2 = NULL;
}
if (lpdds_back != NULL) {
lpdds_back->Release();
lpdds_back = NULL;
}
if (lpdds_pri != NULL) {
lpdds_pri->Release();
lpdds_pri = NULL;
}
if (lpdd_clipper != NULL) {
lpdd_clipper->Release();
lpdd_clipper = NULL;
}
if (lpdd4 != NULL) {
lpdd4->Release();
lpdd4 = NULL;
}
}
static int
ddraw_init(int fs)
{
DDSURFACEDESC2 ddsd;
LPDIRECTDRAW lpdd;
HRESULT hr;
DWORD dw;
HWND h;
INFO("DDraw: initializing (fs=%d)\n", fs);
hr = DirectDrawCreate(NULL, &lpdd, NULL);
if (FAILED(hr)) {
ERRLOG("DDRAW: cannot create an instance (%s)\n", GetError(hr));
return(0);
}
hr = lpdd->QueryInterface(IID_IDirectDraw4, (LPVOID *)&lpdd4);
if (FAILED(hr)) {
ERRLOG("DDRAW: no interfaces found (%s)\n", GetError(hr));
return(0);
}
lpdd->Release();
atexit(ddraw_close);
if (fs) {
dw = DDSCL_SETFOCUSWINDOW | DDSCL_CREATEDEVICEWINDOW | \
DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN | DDSCL_ALLOWREBOOT;
h = hwndMain;
} else {
dw = DDSCL_NORMAL;
h = hwndRender;
}
hr = lpdd4->SetCooperativeLevel(h, dw);
if (FAILED(hr)) {
ERRLOG("DDRAW: SetCooperativeLevel failed (%s)\n", GetError(hr));
return(0);
}
if (fs) {
ddraw_w = GetSystemMetrics(SM_CXSCREEN);
ddraw_h = GetSystemMetrics(SM_CYSCREEN);
hr = lpdd4->SetDisplayMode(ddraw_w, ddraw_h, 32, 0, 0);
if (FAILED(hr)) {
ERRLOG("DDRAW: SetDisplayMode failed (%s)\n", GetError(hr));
return(0);
}
}
memset(&ddsd, 0x00, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
if (fs) {
ddsd.dwFlags |= DDSD_BACKBUFFERCOUNT;
ddsd.ddsCaps.dwCaps |= (DDSCAPS_COMPLEX | DDSCAPS_FLIP);
ddsd.dwBackBufferCount = 1;
}
hr = lpdd4->CreateSurface(&ddsd, &lpdds_pri, NULL);
if (FAILED(hr)) {
ERRLOG("DDRAW: CreateSurface failed (%s)\n", GetError(hr));
return(0);
}
if (fs) {
memset(&ddsd, 0x00, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_BACKBUFFER;
hr = lpdds_pri->GetAttachedSurface(&ddsd.ddsCaps, &lpdds_back2);
if (FAILED(hr)) {
ERRLOG("DDRAW: GetAttachedSurface failed (%s)\n", GetError(hr));
return(0);
}
}
memset(&ddsd, 0x00, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.dwWidth = 2048;
ddsd.dwHeight = 2048;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_VIDEOMEMORY;
hr = lpdd4->CreateSurface(&ddsd, &lpdds_back, NULL);
if (FAILED(hr)) {
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.dwWidth = 2048;
ddsd.dwHeight = 2048;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY;
hr = lpdd4->CreateSurface(&ddsd, &lpdds_back, NULL);
if (FAILED(hr)) {
ERRLOG("DDRAW: CreateSurface(back) failed (%s)\n", GetError(hr));
return(0);
}
}
if (! fs) {
memset(&ddsd, 0x00, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.dwWidth = 2048;
ddsd.dwHeight = 2048;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_VIDEOMEMORY;
hr = lpdd4->CreateSurface(&ddsd, &lpdds_back2, NULL);
if (FAILED(hr)) {
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.dwWidth = 2048;
ddsd.dwHeight = 2048;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY;
hr = lpdd4->CreateSurface(&ddsd, &lpdds_back2, NULL);
if (FAILED(hr)) {
ERRLOG("DDRAW: CreateSurface(back2) failed (%s)\n", GetError(hr));
return(0);
}
}
hr = lpdd4->CreateClipper(0, &lpdd_clipper, NULL);
if (FAILED(hr)) {
ERRLOG("DDRAW: CreateClipper failed (%s)\n", GetError(hr));
return(0);
}
hr = lpdd_clipper->SetHWnd(0, h);
if (FAILED(hr)) {
ERRLOG("DDRAW: SetHWnd failed (%s)\n", GetError(hr));
return(0);
}
hr = lpdds_pri->SetClipper(lpdd_clipper);
if (FAILED(hr)) {
ERRLOG("DDRAW: SetClipper failed (%s)\n", GetError(hr));
return(0);
}
}
ddraw_hwnd = h;
if (fs)
video_blit_set(ddraw_blit_fs);
else
video_blit_set(ddraw_blit);
return(1);
}
static int
SaveBMP(const wchar_t *fn, BITMAPINFO *bmi, uint8_t *pixels)
{
BITMAPFILEHEADER bmpHdr;
FILE *fp;
if ((fp = plat_fopen(fn, L"wb")) == NULL) {
ERRLOG("[SaveBMP] File %ls could not be opened for writing!\n", fn);
return(0);
}
memset(&bmpHdr, 0x00, sizeof(BITMAPFILEHEADER));
bmpHdr.bfSize = sizeof(BITMAPFILEHEADER) + \
sizeof(BITMAPINFOHEADER) + bmi->bmiHeader.biSizeImage;
bmpHdr.bfType = 0x4D42;
bmpHdr.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
(void)fwrite(&bmpHdr, sizeof(BITMAPFILEHEADER), 1, fp);
(void)fwrite(&bmi->bmiHeader, sizeof(BITMAPINFOHEADER), 1, fp);
(void)fwrite(pixels, bmi->bmiHeader.biSizeImage, 1, fp);
/* Clean up. */
(void)fclose(fp);
return(1);
}
static HBITMAP
CopySurface(IDirectDrawSurface4 *pDDSurface)
{
HBITMAP hBmp, hOldBmp;
DDSURFACEDESC2 ddsd;
HDC hDC, hMemDC;
pDDSurface->GetDC(&hDC);
hMemDC = CreateCompatibleDC(hDC);
memset(&ddsd, 0x00, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
pDDSurface->GetSurfaceDesc(&ddsd);
hBmp = CreateCompatibleBitmap(hDC, xs, ys);
hOldBmp = (HBITMAP)SelectObject(hMemDC, hBmp);
BitBlt(hMemDC, 0, 0, xs, ys, hDC, 0, 0, SRCCOPY);
SelectObject(hMemDC, hOldBmp);
DeleteDC(hMemDC);
pDDSurface->ReleaseDC(hDC);
return(hBmp);
}
static void
ddraw_screenshot(const wchar_t *fn)
{
wchar_t path[512];
wchar_t temp[512];
BITMAPINFO bmi;
uint8_t *pixels;
uint8_t *pix2;
HBITMAP hBmp;
HDC hDC;
int i;
#if 0
xs = xsize;
ys = ys2 = ysize;
/* For EGA/(S)VGA, the size is NOT adjusted for overscan. */
if ((overscan_y > 16) && enable_overscan) {
xs += overscan_x;
ys += overscan_y;
}
/* For CGA, the width is adjusted for overscan, but the height is not. */
if (overscan_y == 16) {
if (ys2 <= 250)
ys += (overscan_y >> 1);
else
ys += overscan_y;
}
#endif
get_screen_size_natural(&xs, &ys);
if (ysize <= 250) {
ys >>= 1;
ys2 >>= 1;
}
/* Create a surface copy and store it as a bitmap. */
hBmp = CopySurface(lpdds_back);
/* Create a compatible DC. */
hDC = GetDC(NULL);
/* Request the size info from the bitmap. */
memset(&bmi, 0x00, sizeof(BITMAPINFO));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
GetDIBits(hDC, hBmp, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
if (bmi.bmiHeader.biSizeImage <= 0) {
bmi.bmiHeader.biSizeImage = bmi.bmiHeader.biWidth * abs(bmi.bmiHeader.biHeight) * (bmi.bmiHeader.biBitCount + 7) / 8;
}
/* Allocate a buffer for the pixel data. */
if ((pixels = (uint8_t *)mem_alloc(bmi.bmiHeader.biSizeImage)) == NULL) {
ERRLOG("DDraw: unable to allocate bitmap memory!\n");
swprintf(temp, sizeof_w(temp),
get_string(IDS_ERR_SCRSHOT), fn);
ui_msgbox(MBX_ERROR, temp);
ReleaseDC(NULL, hDC);
return;
}
/* Now get the actual pixel data from the bitmap. */
bmi.bmiHeader.biCompression = BI_RGB;
GetDIBits(hDC, hBmp, 0, bmi.bmiHeader.biHeight,
pixels, &bmi, DIB_RGB_COLORS);
/* No longer need the DC. */
ReleaseDC(NULL, hDC);
/*
* For some CGA modes (320x200, 640x200 etc) we double-up
* the image height so it looks a little better. We simply
* copy each real scanline.
*/
if (ys <= 250) {
/* Save current buffer. */
pix2 = pixels;
/* Update bitmap image size. */
bmi.bmiHeader.biHeight <<= 1;
bmi.bmiHeader.biSizeImage <<= 1;
/* Allocate new buffer, doubled-up. */
pixels = (uint8_t *)mem_alloc(bmi.bmiHeader.biSizeImage);
/* Copy scanlines. */
for (i = 0; i < ys; i++) {
/* Copy original line. */
memcpy(pixels + (i * xs * 8),
pix2 + (i * xs * 4), xs * 4);
/* And copy it once more, doubling it. */
memcpy(pixels + ((i * xs * 8) + (xs * 4)),
pix2 + (i * xs * 4), xs * 4);
}
/* No longer need original buffer. */
free(pix2);
}
/* Save filename. */
wcscpy(path, fn);
#ifdef USE_LIBPNG
/* Save the screenshot, using PNG if available. */
i = png_write_rgb(path, 1, pixels,
(int16_t)bmi.bmiHeader.biWidth,
(int16_t)abs(bmi.bmiHeader.biHeight));
if (i == 0) {
#endif
/* Use BMP, so fix the file name. */
path[wcslen(path)-3] = L'b';
path[wcslen(path)-2] = L'm';
path[wcslen(path)-1] = L'p';
i = SaveBMP(path, &bmi, pixels);
#ifdef USE_LIBPNG
}
#endif
/* Release pixel buffer. */
free(pixels);
/* Show error message if needed. */
if (i == 0) {
swprintf(temp, sizeof_w(temp),
get_string(IDS_ERR_SCRSHOT), path);
ui_msgbox(MBX_ERROR, temp);
}
}
const vidapi_t ddraw_vidapi = {
"ddraw",
"DirectDraw 9+",
1,
ddraw_init,
ddraw_close,
NULL,
NULL,
NULL,
ddraw_screenshot,
NULL
};