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[200/906] get ride of a ATI bug related to GLSL colorspace conversion for I420 and YV12 to rgb

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This commit is contained in:
Julien Isorce 2008-08-20 00:11:39 +02:00 committed by Matthew Waters
parent d5406652af
commit 6c532328f0
1 changed files with 14 additions and 17 deletions
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31
gst-libs/gst/gl/gstgldisplay.c
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@ -253,27 +253,16 @@ gst_gl_display_init (GstGLDisplay *display, GstGLDisplayClass *klass)
" gl_FragColor = vec4(r, g, b, 1.0);\n"
"}\n";
//it works on nvidia+linux but
//there is a bug on ATI+win32 (I think only ATI)
//and the follwing 3 lines:
//" y=texture2DRect(Ytex,nxy).r;\n"
//" u=texture2DRect(Utex,nxy*0.5).r;\n"
//" v=texture2DRect(Vtex,nxy*0.5).r;\n"
//has to be replaced by :
//" y=texture2DRect(Ytex,nxy0.5).r;\n"
//" u=texture2DRect(Utex,nxy).r;\n"
//" v=texture2DRect(Vtex,nxy*0.5).r;\n"
//
//so we have to set a display->hardware (ATI/ NVIDIA)
//and check it etc...
//ATI: "*0.5", ""
//normal: "", "*0.5"
display->text_shader_upload_I420_YV12 =
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect Ytex,Utex,Vtex;\n"
"void main(void) {\n"
" float r,g,b,y,u,v;\n"
" vec2 nxy=gl_TexCoord[0].xy;\n"
" y=texture2DRect(Ytex,nxy).r;\n"
" u=texture2DRect(Utex,nxy*0.5).r;\n"
" y=texture2DRect(Ytex,nxy%s).r;\n"
" u=texture2DRect(Utex,nxy%s).r;\n"
" v=texture2DRect(Vtex,nxy*0.5).r;\n"
" y=1.1643*(y-0.0625);\n"
" u=u-0.5;\n"
@ -1063,15 +1052,23 @@ gst_gl_display_thread_init_upload (GstGLDisplay *display)
break;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
{
gchar text_shader_upload_I420_YV12[2048];
if (g_strncasecmp ("ATI", glGetString (GL_VENDOR), 3) == 0)
sprintf (text_shader_upload_I420_YV12, display->text_shader_upload_I420_YV12, "*0.5", "");
else
sprintf (text_shader_upload_I420_YV12, display->text_shader_upload_I420_YV12, "", "*0.5");
display->shader_upload_I420_YV12 = gst_gl_shader_new ();
if(!gst_gl_shader_compile_and_check (display->shader_upload_I420_YV12,
display->text_shader_upload_I420_YV12, GST_GL_SHADER_FRAGMENT_SOURCE))
text_shader_upload_I420_YV12, GST_GL_SHADER_FRAGMENT_SOURCE))
{
display->isAlive = FALSE;
g_object_unref (G_OBJECT (display->shader_upload_I420_YV12));
display->shader_upload_I420_YV12 = NULL;
}
break;
}
break;
case GST_VIDEO_FORMAT_AYUV:
display->shader_upload_AYUV = gst_gl_shader_new ();
if(!gst_gl_shader_compile_and_check (display->shader_upload_AYUV,