void
GLVideoSystem::set_gamma(float gamma)
{
Uint16 ramp[256];
SDL_CalculateGammaRamp(gamma, ramp);
SDL_SetWindowGammaRamp(m_window, ramp, ramp, ramp);
}
void
SDLBaseVideoSystem::set_gamma(float gamma)
{
Uint16 ramp[256];
SDL_CalculateGammaRamp(gamma, ramp);
SDL_SetWindowGammaRamp(m_sdl_window.get(), ramp, ramp, ramp);
}
void
SDLRenderer::set_gamma(float gamma)
{
Uint16 ramp[256];
SDL_CalculateGammaRamp(gamma, ramp);
SDL_SetWindowGammaRamp(m_window, ramp, ramp, ramp);
}
static int
SDL_SetGamma(SDL_Window *win, float red, float green, float blue)
{
Uint16 red_ramp[256];
Uint16 green_ramp[256];
Uint16 blue_ramp[256];
SDL_CalculateGammaRamp(red, red_ramp);
if (green == red) {
Com_Memcpy(&green_ramp, &red_ramp, sizeof(red_ramp));
} else {
SDL_CalculateGammaRamp(green, green_ramp);
}
if (blue == red) {
Com_Memcpy(blue_ramp, red_ramp, sizeof(red_ramp));
} else {
SDL_CalculateGammaRamp(blue, blue_ramp);
}
return SDL_SetWindowGammaRamp(win, red_ramp, green_ramp, blue_ramp);
}
void GraphicsManager::setGamma(float gamma) {
// Force calling it from the main thread
if (!Common::isMainThread()) {
Events::MainThreadFunctor<void> functor(boost::bind(&GraphicsManager::setGamma, this, gamma));
return RequestMan.callInMainThread(functor);
}
_gamma = gamma;
uint16* gammaRamp = 0;
SDL_CalculateGammaRamp(gamma, gammaRamp);
SDL_SetWindowGammaRamp(_screen, gammaRamp, gammaRamp, gammaRamp);
delete gammaRamp;
}
bool CVideoMode::InitSDL()
{
ENSURE(!m_IsInitialised);
ReadConfig();
EnableS3TC();
// preferred video mode = current desktop settings
// (command line params may override these)
gfx::GetVideoMode(&m_PreferredW, &m_PreferredH, &m_PreferredBPP, &m_PreferredFreq);
int w = m_ConfigW;
int h = m_ConfigH;
if (m_ConfigFullscreen)
{
// If fullscreen and no explicit size set, default to the desktop resolution
if (w == 0 || h == 0)
{
w = m_PreferredW;
h = m_PreferredH;
}
}
// If no size determined, default to something sensible
if (w == 0 || h == 0)
{
w = DEFAULT_WINDOW_W;
h = DEFAULT_WINDOW_H;
}
if (!m_ConfigFullscreen)
{
// Limit the window to the screen size (if known)
if (m_PreferredW)
w = std::min(w, m_PreferredW);
if (m_PreferredH)
h = std::min(h, m_PreferredH);
}
int bpp = GetBestBPP();
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
#if !SDL_VERSION_ATLEAST(1, 3, 0)
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, g_VSync ? 1 : 0);
#endif
#if CONFIG2_GLES && SDL_VERSION_ATLEAST(1, 3, 0)
// Require GLES 2.0
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#endif
if (!SetVideoMode(w, h, bpp, m_ConfigFullscreen))
{
// Fall back to a smaller depth buffer
// (The rendering may be ugly but this helps when running in VMware)
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
if (!SetVideoMode(w, h, bpp, m_ConfigFullscreen))
return false;
}
#if SDL_VERSION_ATLEAST(1, 3, 0)
SDL_GL_SetSwapInterval(g_VSync ? 1 : 0);
#endif
// Work around a bug in the proprietary Linux ATI driver (at least versions 8.16.20 and 8.14.13).
// The driver appears to register its own atexit hook on context creation.
// If this atexit hook is called before SDL_Quit destroys the OpenGL context,
// some kind of double-free problem causes a crash and lockup in the driver.
// Calling SDL_Quit twice appears to be harmless, though, and avoids the problem
// by destroying the context *before* the driver's atexit hook is called.
// (Note that atexit hooks are guaranteed to be called in reverse order of their registration.)
atexit(SDL_Quit);
// End work around.
ogl_Init(); // required after each mode change
// (TODO: does that mean we need to call this when toggling fullscreen later?)
#if SDL_VERSION_ATLEAST(2, 0, 0)
u16 ramp[256];
SDL_CalculateGammaRamp(g_Gamma, ramp);
if (SDL_SetWindowGammaRamp(m_Window, ramp, ramp, ramp) < 0)
LOGWARNING(L"SDL_SetGamma failed");
#else
if (SDL_SetGamma(g_Gamma, g_Gamma, g_Gamma) < 0)
LOGWARNING(L"SDL_SetGamma failed");
#endif
m_IsInitialised = true;
if (!m_ConfigFullscreen)
{
m_WindowedW = w;
m_WindowedH = h;
}
return true;
}
void SDLHardwareRenderDevice::setGamma(float g) {
Uint16 ramp[256];
SDL_CalculateGammaRamp(g, ramp);
SDL_SetWindowGammaRamp(window, ramp, ramp, ramp);
}
void SetGamma(double fGamma)
{
Uint16 pRawRamp[256];
SDL_CalculateGammaRamp((float)((std::min<double>)((std::max<double>)(fGamma, 0.0), 1.0)), pRawRamp);
SDL_SetWindowGammaRamp(m_Window, pRawRamp, pRawRamp, pRawRamp);
}
Uint16 idris_SDL_calculateGammaRamp(float gamma) {
Uint16 retval;
SDL_CalculateGammaRamp(gamma, &retval);
return retval;
}
/**
* @brief Call to SDL_CalculateGammaRamp
*
* @sa http://wiki.libsdl.org/moin.fcg/SDL_CalculateGammaRamp
*/
int
pixels_calcGammaRamp(void *arg)
{
const char *expectedError1 = "Parameter 'gamma' is invalid";
const char *expectedError2 = "Parameter 'ramp' is invalid";
const char *error;
float gamma;
Uint16 *ramp;
int variation;
int i;
int changed;
Uint16 magic = 0xbeef;
/* Allocate temp ramp array and fill with some value */
ramp = (Uint16 *)SDL_malloc(256 * sizeof(Uint16));
SDLTest_AssertCheck(ramp != NULL, "Validate temp ramp array could be allocated");
if (ramp == NULL) return TEST_ABORTED;
/* Make call with different gamma values */
for (variation = 0; variation < 4; variation++) {
switch (variation) {
/* gamma = 0 all black */
case 0:
gamma = 0.0f;
break;
/* gamma = 1 identity */
case 1:
gamma = 1.0f;
break;
/* gamma = [0.2,0.8] normal range */
case 2:
gamma = 0.2f + 0.8f * SDLTest_RandomUnitFloat();
break;
/* gamma = >1.1 non-standard range */
case 3:
gamma = 1.1f + SDLTest_RandomUnitFloat();
break;
}
/* Make call and check that values were updated */
for (i = 0; i < 256; i++) ramp[i] = magic;
SDL_CalculateGammaRamp(gamma, ramp);
SDLTest_AssertPass("Call to SDL_CalculateGammaRamp(%f)", gamma);
changed = 0;
for (i = 0; i < 256; i++) if (ramp[i] != magic) changed++;
SDLTest_AssertCheck(changed > 250, "Validate that ramp was calculated; expected: >250 values changed, got: %d values changed", changed);
/* Additional value checks for some cases */
i = SDLTest_RandomIntegerInRange(64,192);
switch (variation) {
case 0:
SDLTest_AssertCheck(ramp[i] == 0, "Validate value at position %d; expected: 0, got: %d", i, ramp[i]);
break;
case 1:
SDLTest_AssertCheck(ramp[i] == ((i << 8) | i), "Validate value at position %d; expected: %d, got: %d", i, (i << 8) | i, ramp[i]);
break;
case 2:
case 3:
SDLTest_AssertCheck(ramp[i] > 0, "Validate value at position %d; expected: >0, got: %d", i, ramp[i]);
break;
}
}
/* Negative cases */
SDL_ClearError();
SDLTest_AssertPass("Call to SDL_ClearError()");
gamma = -1;
for (i=0; i<256; i++) ramp[i] = magic;
SDL_CalculateGammaRamp(gamma, ramp);
SDLTest_AssertPass("Call to SDL_CalculateGammaRamp(%f)", gamma);
error = SDL_GetError();
SDLTest_AssertPass("Call to SDL_GetError()");
SDLTest_AssertCheck(error != NULL, "Validate that error message was not NULL");
if (error != NULL) {
SDLTest_AssertCheck(SDL_strcmp(error, expectedError1) == 0,
"Validate error message, expected: '%s', got: '%s'", expectedError1, error);
}
changed = 0;
for (i = 0; i < 256; i++) if (ramp[i] != magic) changed++;
SDLTest_AssertCheck(changed ==0, "Validate that ramp unchanged; expected: 0 values changed got: %d values changed", changed);
SDL_CalculateGammaRamp(0.5f, NULL);
SDLTest_AssertPass("Call to SDL_CalculateGammaRamp(0.5,NULL)");
error = SDL_GetError();
SDLTest_AssertPass("Call to SDL_GetError()");
SDLTest_AssertCheck(error != NULL, "Validate that error message was not NULL");
if (error != NULL) {
SDLTest_AssertCheck(SDL_strcmp(error, expectedError2) == 0,
"Validate error message, expected: '%s', got: '%s'", expectedError2, error);
}
/* Cleanup */
SDL_free(ramp);
return TEST_COMPLETED;
}
