DrawSetTextureRGBA: Difference between revisions

From Valve Developer Community
Jump to navigation Jump to search
m (typo)
m (→‎See also: Unicodifying, replaced: See Also → See also)
 
(24 intermediate revisions by 8 users not shown)
Line 1: Line 1:
DrawSetTextureRGBA() is a function that you should use to draw raw RGBA data to the HUD, for example when you are rendering a mask or something. DrawSetTextureRGBA is one of the worst documented features in the SDK, and hasn't been seen working in any way, AFAIK. The following code is by the book, but doesn't work at all (it just paints a white fog over the screen).
=The function=
void [[ISurface]]::'''DrawSetTextureRGBA'''( int id, const unsigned char *rgba, int wide, int tall, int hardwareFilter, bool forceReload ) = 0
This is a function that you should use to draw raw RGBA data to the HUD, for example when you are rendering a mask.
==Sample==
===Initialization===
#define HEIGHT 256
#define WIDTH 256
#define PIXEL_BYTES 4 // RGBA (never changes)
unsigned char abPic[ HEIGHT * WIDTH * PIXEL_BYTES ];


<pre>
===Raw Data===
//abPic is an unsigned int[128][128] with some texture data
for (y = 0; y < HEIGHT; y++) // up/down traverse
m_iHudTexture=surface()->CreateNewTextureID();
{
surface()->DrawSetTextureRGBA(m_iHudTexture,(unsigned char*)abPic,128,128,false,true);
for (x = 0; x < WIDTH; x++) // left/right traverse
Assert(surface()->IsTextureIDValid(m_iHudTexture));
{
surface()->DrawSetColor(Color(255,255,255,128));
int offset = (x + y * WIDTH) * PIXEL_BYTES;
surface()->DrawTexturedRect(0,0,GetWide(),GetTall());
char *dst = ((char*)abPic) + offset;
</pre>
dst[0] = (unsigned char)255;//red
dst[1] = (unsigned char)255;//green
dst[2] = (unsigned char)255;//blue
dst[3] = (unsigned char)255;//alpha
}
}


Emails on HLCoders (March 2005, [hlcoders] DrawSetTextureRGBA) about this issue haven't helped a bit. We, as the Source modding community can only hope VALVe will eventually fix this, or give information on how this function should be used.
===Set Up Texture ID===
m_iHudTexture = surface()->[[CreateNewTextureID]](true);
surface()->'''DrawSetTextureRGBA'''( m_iHudTexture, (unsigned char*)abPic, HEIGHT, WIDTH, false, true );
surface()->[[DrawSetColor]]( Color( 255, 255, 255, 128 ) );
surface()->[[DrawTexturedRect]]( 0, 0, GetWide(), GetTall() );


[[Category: Complains]]
==See also==
[[Category: Programming]]
* [[CreateProceduralTexture]]
* [[CreateMaterial]]
[[Category:ISurface]]
[[Category:Developer Issues and Workarounds]]

Latest revision as of 09:15, 8 January 2024

The function

void ISurface::DrawSetTextureRGBA( int id, const unsigned char *rgba, int wide, int tall, int hardwareFilter, bool forceReload ) = 0

This is a function that you should use to draw raw RGBA data to the HUD, for example when you are rendering a mask.

Sample

Initialization

#define HEIGHT 256
#define WIDTH 256
#define PIXEL_BYTES 4 // RGBA (never changes)
unsigned char abPic[ HEIGHT * WIDTH * PIXEL_BYTES ];

Raw Data

for (y = 0; y < HEIGHT; y++) // up/down traverse
{ 
	for (x = 0; x < WIDTH; x++) // left/right traverse
	{
		int offset = (x + y * WIDTH) * PIXEL_BYTES;
		char *dst = ((char*)abPic) + offset;
					
		dst[0] = (unsigned char)255;//red
		dst[1] = (unsigned char)255;//green
		dst[2] = (unsigned char)255;//blue
		dst[3] = (unsigned char)255;//alpha
	}
}

Set Up Texture ID

	m_iHudTexture = surface()->CreateNewTextureID(true);
	surface()->DrawSetTextureRGBA( m_iHudTexture, (unsigned char*)abPic, HEIGHT, WIDTH, false, true );
	surface()->DrawSetColor( Color( 255, 255, 255, 128 ) );
	surface()->DrawTexturedRect( 0, 0, GetWide(), GetTall() );

See also

Retrieved from "https://developer.valvesoftware.com/w/index.php?title=DrawSetTextureRGBA&oldid=372877"