Accelerated blits available or not for me?

SDL Development
1

I’m a beginner for SDL and I’m reading the book “Focus on SDL”.
When I was trying SDL_GetVideoInfo() as below, (SDL version 1.2.11,
VS2005/VC6 on Windows)
…
const SDL_VideoInfo *g_pVideoInfo = NULL;
int main(int argc, char *argv[])
{
SDL_Init(SDL_INIT_VIDEO);
atexit(SDL_Quit);
g_pVideoInfo = SDL_GetVideoInfo();
…
I got the following result:

Video Information:
hw_available? 0
wm_available? 1
blit_hw? 0
blit_hw_CC? 0
blit_hw_A? 0
blit_sw? 0
blit_sw_CC? 0
blit_sw_A? 0
blit_fill? 0
video memory(in K)? 0
bits per pixel? 32

Then, I used a much older version of SDL, maybe 0.9.8, built by myself.
I got a very different result:(the memory is equal to Windows recognized)

Video Information:
hw_available? 1
wm_available? 1
blit_hw? 1
blit_hw_CC? 1
blit_hw_A? 0
blit_sw? 1
blit_sw_CC? 1
blit_sw_A? 0
blit_fill? 1
video memory(in K)? 850236
bits per pixel? 32

Why different?
Which is true? If the older is right, what’s wrong with the new one?
Acceleratable or not?–
??
Li Bo
@Li_Bo

2

Hello !

Why different?
Which is true? If the older is right, what’s wrong with the new one?
Acceleratable or not?

My guess is the old SDL version uses DirectX
as the standard GFX driver and there you get hardware
acceleration and the newer one uses GDI.

The switch to GDI as the standard driver was
needed, because the SDL DirectX driver uses DirectX 5
which gives a headache on newer Windows Versions like XP
and Vista.

CU