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Windows: Framebuffer draw now works on win32s

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UnknownShadow200 2025-04-17 19:15:49 +10:00
parent 8a4b76ec59
commit 56dc6d133d
1 changed files with 32 additions and 11 deletions
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43
src/Window_Win.c
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@ -771,24 +771,45 @@ void Window_AllocFramebuffer(struct Bitmap* bmp, int width, int height) {
bmp->scan0 = (BitmapCol*)Mem_Alloc(width * height, BITMAPCOLOR_SIZE, "window pixels");
}
void Window_DrawFramebuffer(Rect2D r, struct Bitmap* bmp) {
/* Used by Win32s on windows 3.1 */
static void DrawFramebufferSlow(Rect2D r, struct Bitmap* bmp) {
char buffer[640 * 3];
BITMAPINFO hdr = { 0 };
int x, y, width;
/* TODO partial update */
/* Have to use 24 bpp row by row, 32 bpp (and negative height) doesn't work */
hdr.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
hdr.bmiHeader.biWidth = bmp->width;
hdr.bmiHeader.biHeight = 1;
hdr.bmiHeader.biBitCount = 24;
hdr.bmiHeader.biPlanes = 1;
for (y = r.y; y < r.y + r.height; y++)
{
BitmapCol* row = Bitmap_GetRow(bmp, y);
width = bmp->width;
for (x = 0; x < width; x++)
{
BitmapCol rgb = row[x];
buffer[x * 3 + 0] = BitmapCol_B(rgb);
buffer[x * 3 + 1] = BitmapCol_G(rgb);
buffer[x * 3 + 2] = BitmapCol_R(rgb);
}
SetDIBitsToDevice(win_DC, 0, y, width, 1, 0, 0,
0, 1, buffer, &hdr, DIB_RGB_COLORS);
}
}
void Window_DrawFramebuffer(Rect2D r, struct Bitmap* bmp) {
if (draw_DIB) {
HGDIOBJ oldSrc = SelectObject(draw_DC, draw_DIB);
BitBlt(win_DC, r.x, r.y, r.width, r.height, draw_DC, r.x, r.y, SRCCOPY);
SelectObject(draw_DC, oldSrc);
} else {
/* TODO partial update */
hdr.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
hdr.bmiHeader.biWidth = bmp->width;
hdr.bmiHeader.biHeight = -bmp->height;
hdr.bmiHeader.biBitCount = 32;
hdr.bmiHeader.biPlanes = 1;
if (SetDIBitsToDevice(win_DC, 0, 0, bmp->width, bmp->height, 0, 0,
0, bmp->height, bmp->scan0, &hdr, DIB_RGB_COLORS)) return;
Process_Abort2(GetLastError(), "Failed to set DIB bits");
DrawFramebufferSlow(r, bmp);
}
}