Hi,
> [!] gl_cmap shader compilation failed (cmap_simple.glsl)
> [w] Color map shader 'simple' failed to load, will use fallback
> [!] gl_cmap shader compilation failed (cmap_bicubic.glsl)
> [w] Color map shader 'bicubic' failed to load, will use fallback
> [!] gl_cmap shader compilation failed (cmap_fallback.glsl)
> [!] Color map shader 'fallback' failed, aborting
> gr::log :ERROR: qt_sink_c0 - Failed to initialize fosphor
:/
In theory it's supposed to print the compile log from the driver
(which ideally would show why it failed), but apparently the driver
didn't return any logs so that mean I have no clue whatsoever why it
would have failed
Try to add some more debugging to the GL calls preceding the error :
--- a/lib/fosphor/gl_cmap.c
+++ b/lib/fosphor/gl_cmap.c
@@ -60,6 +60,15 @@ struct fosphor_gl_cmap_ctx {
/* Helpers / Internal API
*/
/* --------------------------------------------------------------------------
*/
+static void
+gl_check(const char *s)
+{
+ GLenum x;
+ if ((x = glGetError()) != GL_NO_ERROR) {
+ fprintf(stderr, "[!] GL Error %d at %s\n", x, s);
+ }
+}
+
static int
gl_cmap_init_shader(struct gl_cmap_shader *shader, const char *name)
{
@@ -73,11 +82,15 @@ gl_cmap_init_shader(struct gl_cmap_shader *shader,
const char *name)
/* Allocate shader */
shader->prog = glCreateProgram();
+ gl_check("glCreateProgram");
shader->shader = glCreateShader(GL_FRAGMENT_SHADER);
+ gl_check("glCreateShader");
/* Compile / Link / Attach */
glShaderSource(shader->shader, 1, (const char **)&shader_src, NULL);
+ gl_check("glShaderSource");
glCompileShader(shader->shader);
+ gl_check("glCompileShader");
/* Check success and compile log */
glGetShaderiv(shader->shader, GL_COMPILE_STATUS, &orv);
> The app is running, but the render area of the spectrum is completely blank.
>
> I am on your "gr3.8" branch. OpenCL is exactly the same as on Ubuntu 18.04 (I
> need the older 340 Nvidia driver on my old NVS 4200M, if you remember), GLFW
> is the latest master. Everything compiles just fine, only at runtime this
> issue presents itself.
This is unrelated to OpenCL.
Theses shaders are purely OpenGL stuff.
Cheers,
Sylvain
