Add the ARB_texture_rg extension

[libs/gl.git] / source / pixelformat.cpp

diff --git a/source/pixelformat.cpp b/source/pixelformat.cpp
index 99f15307d1304bf41c36c80aa7af825fd41a7171..ac2b1ea73dfde7818fab470b45565e1c5f5e32a2 100644 (file)
--- a/source/pixelformat.cpp
+++ b/source/pixelformat.cpp
@@ -14,6 +14,10 @@ void operator>>(const LexicalConverter &conv, PixelFormat &fmt)
                fmt = STENCIL_INDEX;
        else if(conv.get()=="DEPTH_COMPONENT")
                fmt = DEPTH_COMPONENT;
+       else if(conv.get()=="RED")
+               fmt = RED;
+       else if(conv.get()=="RG")
+               fmt = RG;
        else if(conv.get()=="RGB")
                fmt = RGB;
        else if(conv.get()=="RGBA")
@@ -76,6 +80,12 @@ PixelFormat get_base_pixelformat(PixelFormat pf)
 {
        switch(pf)
        {
+       case R8:
+       case R16F:
+       case R32F: return RED;
+       case RG8:
+       case RG16F:
+       case RG32F: return RG;
        case RGB8:
        case RGB16F:
        case RGB32F:
@@ -87,13 +97,9 @@ PixelFormat get_base_pixelformat(PixelFormat pf)
        case SRGB_ALPHA:
        case SRGB8_ALPHA8: return RGBA;
        case LUMINANCE8:
-       case LUMINANCE16F:
-       case LUMINANCE32F:
        case SLUMINANCE:
        case SLUMINANCE8: return LUMINANCE;
        case LUMINANCE_ALPHA8:
-       case LUMINANCE_ALPHA16F:
-       case LUMINANCE_ALPHA32F:
        case SLUMINANCE_ALPHA:
        case SLUMINANCE8_ALPHA8: return LUMINANCE_ALPHA;
        case DEPTH_COMPONENT16:
@@ -103,6 +109,29 @@ PixelFormat get_base_pixelformat(PixelFormat pf)
        }
 }
 
+PixelFormat get_sized_pixelformat(PixelFormat pf)
+{
+       switch(pf)
+       {
+       case RED: return R8;
+       case RG: return RG8;
+       case RGB: return RGB8;
+       case RGBA: return RGBA8;
+       case SRGB: return SRGB8;
+       case SRGB_ALPHA: return SRGB8_ALPHA8;
+       case LUMINANCE: return LUMINANCE8;
+       case SLUMINANCE: return SLUMINANCE8;
+       case LUMINANCE_ALPHA: return LUMINANCE8_ALPHA8;
+       case SLUMINANCE_ALPHA: return SLUMINANCE8_ALPHA8;
+       case DEPTH_COMPONENT:
+               if(get_gl_api()==OPENGL_ES2)
+                       return DEPTH_COMPONENT16;
+               else
+                       return DEPTH_COMPONENT32;
+       default: return pf;
+       }
+}
+
 PixelFormat get_srgb_pixelformat(PixelFormat pf)
 {
        switch(pf)
@@ -125,9 +154,11 @@ unsigned get_component_count(PixelFormat pf)
        {
        case STENCIL_INDEX:
        case DEPTH_COMPONENT:
+       case RED:
        case LUMINANCE:
        case SLUMINANCE:
                return 1;
+       case RG:
        case LUMINANCE_ALPHA:
        case SLUMINANCE_ALPHA:
                return 2;
@@ -146,18 +177,18 @@ unsigned get_component_size(PixelFormat pf)
 {
        switch(pf)
        {
+       case R16F:
+       case RG16F:
        case RGB16F:
        case RGBA16F:
-       case LUMINANCE16F:
-       case LUMINANCE_ALPHA16F:
        case DEPTH_COMPONENT16:
                return 2;
        case DEPTH_COMPONENT24:
                return 3;
+       case R32F:
+       case RG32F:
        case RGB32F:
        case RGBA32F:
-       case LUMINANCE32F:
-       case LUMINANCE_ALPHA32F:
        case DEPTH_COMPONENT32:
                return 4;
        default:
@@ -174,14 +205,23 @@ void require_pixelformat(PixelFormat pf)
 {
        switch(pf)
        {
+       case RED:
+       case R8:
+       case RG:
+       case RG8:
+               { static Require _req(ARB_texture_rg); }
+               break;
+       case R16F:
+       case R32F:
+       case RG16F:
+       case RG32F:
+               { static Require _req(ARB_texture_rg); }
+               { static Require _req(ARB_texture_float); }
+               break;
        case RGB16F:
        case RGB32F:
        case RGBA16F:
        case RGBA32F:
-       case LUMINANCE16F:
-       case LUMINANCE32F:
-       case LUMINANCE_ALPHA16F:
-       case LUMINANCE_ALPHA32F:
                { static Require _req(ARB_texture_float); }
                break;
        case SRGB: