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[128/906] add GstGLShader stuffs in the vs8 project, fix laplacian fragment code to make it compile on ATI, and fix check function about Opengl and Glew version

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Julien Isorce 2008-07-18 21:55:00 +02:00 committed by Matthew Waters
parent aeadf6bc0e
commit 44ec9c01dd
2 changed files with 36 additions and 17 deletions
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12
gst-libs/gst/gl/gstgldisplay.c
View file

@ -670,24 +670,22 @@ gst_gl_display_thread_create_context (GstGLDisplay *display)
GString* opengl_version = g_string_truncate (g_string_new ((gchar*) glGetString (GL_VERSION)), 3);
gint opengl_version_major = 0;
gint opengl_version_minor = 0;
GString* glew_version = g_string_truncate (g_string_new ((gchar*) glewGetString (GLEW_VERSION)), 3);
gint glew_version_major = 0;
gint glew_version_minor = 0;
sscanf(opengl_version->str, "%d.%d", &opengl_version_major, &opengl_version_minor);
sscanf(glew_version->str, "%d.%d", &glew_version_major, &glew_version_minor);
g_print ("GL_VERSION: %s\n", glGetString (GL_VERSION));
g_print ("GLEW_VERSION: %s\n", glewGetString (GLEW_VERSION));
g_print ("GL_SHADING_LANGUAGE_VERSION: %s\n", glGetString (GL_SHADING_LANGUAGE_VERSION));
g_print ("GL_VENDOR: %s\n", glGetString (GL_VENDOR));
g_print ("GL_RENDERER: %s\n", glGetString (GL_RENDERER));
g_string_free (opengl_version, TRUE);
g_string_free (glew_version, TRUE);
if ((opengl_version_major < 1 && opengl_version_minor < 4) ||
(glew_version_major < 1 && glew_version_minor < 4) )
if ((opengl_version_major < 1) ||
(GLEW_VERSION_MAJOR < 1) ||
(opengl_version_major < 2 && opengl_version_major >= 1 && opengl_version_minor < 4) ||
(GLEW_VERSION_MAJOR < 2 && GLEW_VERSION_MAJOR >= 1 && GLEW_VERSION_MINOR < 4) )
{
//turn off the pipeline, the old drivers are not yet supported
g_print ("Required OpenGL >= 1.4.0 and Glew >= 1.4.0\n");

41
gst/gl/gstglfilterlaplacian.c
View file

@ -62,10 +62,11 @@ static const gchar *convolution_fragment_source =
"uniform float norm_offset;"
"uniform float kernel[9];"
"void main () {"
" vec2 offset[9];"
" offset = vec2[] ( vec2(-1.0,-1.0), vec2( 0.0,-1.0), vec2( 1.0,-1.0),"
" vec2(-1.0, 0.0), vec2( 0.0, 0.0), vec2( 1.0, 0.0),"
" vec2(-1.0, 1.0), vec2( 0.0, 1.0), vec2( 1.0, 1.0) );"
" const int N = 9;"
" const vec2 offset[N] = vec2[N] ("
" vec2(-1.0,-1.0), vec2( 0.0,-1.0), vec2( 1.0,-1.0),"
" vec2(-1.0, 0.0), vec2( 0.0, 0.0), vec2( 1.0, 0.0),"
" vec2(-1.0, 1.0), vec2( 0.0, 1.0), vec2( 1.0, 1.0) );"
" vec2 texturecoord = gl_TexCoord[0].st;"
" int i;"
" vec4 sum = vec4 (0.0);"
@ -111,8 +112,19 @@ gst_gl_filter_laplacian_reset (GstGLFilter* filter)
{
GstGLFilterLaplacian* laplacian_filter = GST_GL_FILTER_LAPLACIAN(filter);
//blocking call, wait the opengl thread has destroyed the shader program
g_object_unref (G_OBJECT (laplacian_filter->shader));
//I commented the following line to avoid a crash for now
//It crashs because when unreferencing the GstGLShader
//if ref is down to 0 it causes a finalize then a gst_gl_shader_release
//then a glDeleteObjectARB
//and this glDeleteObjectARB must be executed in by (in) the gl thread
//How to do that so ? Easy, using the gst_gl_display_del_shader method
//but I have not modified it yet (*1*) to use GstGLShader
//I'll do that soon so just comment the following line for now
//g_object_unref (G_OBJECT (laplacian_filter->shader));
//blocking call, wait the opengl thread has destroyed the GstGLShader
//Commented for the reason *1*
//gst_gl_display_del_shader (filter->display, laplacian_filter->shader);
}
static void
@ -149,6 +161,11 @@ gst_gl_filter_laplacian_init_shader (GstGLFilter* filter)
// GstGLFilterLaplacian* laplacian_filter = GST_GL_FILTER_LAPLACIAN (filter);
// at the moment I do everything in the laplacian_callback
// ok, then for the same reason *1* explained in the
// gst_gl_filter_laplacian_reset method I comment the following line
//blocking call, wait the opengl thread has destroyed the shader program
//gst_gl_display_del_shader (filter->display, laplacian_filter->shader);
}
static gboolean
@ -181,12 +198,16 @@ gst_gl_filter_laplacian_callback (gint width, gint height, guint texture, gpoint
glLoadIdentity ();
/* compile and link the shader (if not done previously) */
//FIXME: do it in the gst_gl_filter_laplacian_init_shader method
if (!laplacian_filter->shader)
{
laplacian_filter->shader = gst_gl_shader_new ();
g_return_if_fail (
gst_gl_shader_compile_and_check (laplacian_filter->shader, convolution_fragment_source,
GST_GL_SHADER_FRAGMENT_SOURCE));
g_return_if_fail (
gst_gl_shader_compile_and_check (laplacian_filter->shader, convolution_fragment_source,
GST_GL_SHADER_FRAGMENT_SOURCE));
}
gst_gl_shader_use (laplacian_filter->shader);
glActiveTexture (GL_TEXTURE0);