mesa/st: add ST_DEBUG environment variable

At last it's possible to turn on tgsi dumps and other debugging in the
state tracker without modifying sources...

src/mesa/state_tracker/st_atom_constbuf.c

@@ -39,6 +39,7 @@
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
 
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_atom.h"
 #include "st_atom_constbuf.h"
@@ -75,7 +76,7 @@ void st_upload_constants( struct st_context *st,
                                         PIPE_BUFFER_USAGE_CONSTANT,
 					paramBytes );
 
-      if (0) {
+      if (ST_DEBUG & DEBUG_CONSTANTS) {
 	 debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n", 
                       __FUNCTION__, shader_type, params->NumParameters,
                       params->StateFlags);

src/mesa/state_tracker/st_cb_accum.c

@@ -34,6 +34,7 @@
 #include "main/image.h"
 #include "main/macros.h"
 
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_cb_accum.h"
 #include "st_cb_fbo.h"
@@ -136,6 +137,9 @@ accum_accum(struct st_context *st, GLfloat value,
    GLubyte *data = acc_strb->data;
    GLfloat *buf;
 
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
+
    color_trans = st_cond_flush_get_tex_transfer(st, color_strb->texture,
 						0, 0, 0,
 						PIPE_TRANSFER_READ, xpos, ypos,
@@ -181,6 +185,10 @@ accum_load(struct st_context *st, GLfloat value,
    GLubyte *data = acc_strb->data;
    GLfloat *buf;
 
+
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
+
    color_trans = st_cond_flush_get_tex_transfer(st, color_strb->texture,
 						0, 0, 0,
 						PIPE_TRANSFER_READ, xpos, ypos,
@@ -228,6 +236,9 @@ accum_return(GLcontext *ctx, GLfloat value,
    const GLubyte *data = acc_strb->data;
    GLfloat *buf;
 
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
+
    buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
 
    if (!colormask[0] || !colormask[1] || !colormask[2] || !colormask[3])

src/mesa/state_tracker/st_cb_drawpixels.c

@@ -40,6 +40,7 @@
 #include "shader/prog_parameter.h"
 #include "shader/prog_print.h"
 
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_atom.h"
 #include "st_atom_constbuf.h"
@@ -1090,6 +1091,9 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
       struct pipe_transfer *ptTex;
       enum pipe_transfer_usage transfer_usage;
 
+      if (ST_DEBUG & DEBUG_FALLBACK)
+         debug_printf("%s: fallback processing\n", __FUNCTION__);
+
       if (type == GL_DEPTH && pf_is_depth_and_stencil(pt->format))
          transfer_usage = PIPE_TRANSFER_READ_WRITE;
       else

src/mesa/state_tracker/st_cb_readpixels.c

@@ -43,6 +43,7 @@
 #include "pipe/p_inlines.h"
 #include "util/u_tile.h"
 
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_cb_bitmap.h"
 #include "st_cb_readpixels.h"
@@ -416,6 +417,9 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
       yStep = 1;
    }
 
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
+
    /*
     * Copy pixels from pipe_transfer to user memory
     */

src/mesa/state_tracker/st_cb_texture.c

@@ -43,6 +43,7 @@
 #include "main/texobj.h"
 #include "main/texstore.h"
 
+#include "state_tracker/st_debug.h"
 #include "state_tracker/st_context.h"
 #include "state_tracker/st_cb_fbo.h"
 #include "state_tracker/st_cb_texture.h"
@@ -903,6 +904,9 @@ decompress_with_blit(GLcontext * ctx, GLenum target, GLint level,
          GLvoid *dest = _mesa_image_address2d(&ctx->Pack, pixels, width,
                                               height, format, type, row, 0);
 
+         if (ST_DEBUG & DEBUG_FALLBACK)
+            debug_printf("%s: fallback format translation\n", __FUNCTION__);
+
          /* get float[4] rgba row from surface */
          pipe_get_tile_rgba(tex_xfer, 0, row, width, 1, rgba);
 
@@ -1294,6 +1298,9 @@ fallback_copy_texsubimage(GLcontext *ctx, GLenum target, GLint level,
    struct pipe_transfer *src_trans;
    GLvoid *texDest;
    enum pipe_transfer_usage transfer_usage;
+   
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
 
    assert(width <= MAX_WIDTH);
 
@@ -1419,6 +1426,12 @@ compatible_src_dst_formats(const struct gl_renderbuffer *src,
       return TGSI_WRITEMASK_XYZ; /* A ==> 1.0 */
    }
    else {
+      if (ST_DEBUG & DEBUG_FALLBACK)
+         debug_printf("%s failed for src %s, dst %s\n",
+                      __FUNCTION__, 
+                      _mesa_lookup_enum_by_nr(srcFormat),
+                      _mesa_lookup_enum_by_nr(dstLogicalFormat));
+
       /* Otherwise fail.
        */
       return 0;

src/mesa/state_tracker/st_context.c

@@ -36,6 +36,7 @@
 #include "shader/shader_api.h"
 #include "glapi/glapi.h"
 #include "st_public.h"
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_cb_accum.h"
 #include "st_cb_bitmap.h"
@@ -113,6 +114,9 @@ st_create_context_priv( GLcontext *ctx, struct pipe_context *pipe )
    st->ctx = ctx;
    st->pipe = pipe;
 
+   /* XXX: this is one-off, per-screen init: */
+   st_debug_init();
+   
    /* state tracker needs the VBO module */
    _vbo_CreateContext(ctx);
 

src/mesa/state_tracker/st_debug.c

@@ -41,6 +41,32 @@
 
 
 
+#ifdef DEBUG
+int ST_DEBUG = 0;
+
+static const struct debug_named_value st_debug_flags[] = {
+   { "mesa",     DEBUG_MESA },
+   { "tgsi",     DEBUG_TGSI },
+   { "pipe",     DEBUG_PIPE },
+   { "tex",      DEBUG_TEX },
+   { "fallback", DEBUG_FALLBACK },
+   { "screen",   DEBUG_SCREEN },
+   { "query",    DEBUG_QUERY },
+   {NULL, 0}
+};
+#endif
+
+
+void
+st_debug_init(void)
+{
+#ifdef DEBUG
+   ST_DEBUG = debug_get_flags_option("ST_DEBUG", st_debug_flags, 0 );
+#endif
+}
+
+
+
 /**
  * Print current state.  May be called from inside gdb to see currently
  * bound vertex/fragment shaders and associated constants.
@@ -68,3 +94,5 @@ st_print_current(void)
    if (st->fp->Base.Base.Parameters)
       _mesa_print_parameter_list(st->fp->Base.Base.Parameters);
 }
+
+

src/mesa/state_tracker/st_debug.h

@@ -29,8 +29,44 @@
 #ifndef ST_DEBUG_H
 #define ST_DEBUG_H
 
+#include "pipe/p_compiler.h"
+#include "util/u_debug.h"
+
 extern void
 st_print_current(void);
 
 
+#define DEBUG_MESA      0x1
+#define DEBUG_TGSI      0x2
+#define DEBUG_CONSTANTS 0x4
+#define DEBUG_PIPE      0x8
+#define DEBUG_TEX       0x10
+#define DEBUG_FALLBACK  0x20
+#define DEBUG_QUERY     0x40
+#define DEBUG_SCREEN    0x80
+
+#ifdef DEBUG
+extern int ST_DEBUG;
+#define DBSTR(x) x
+#else
+#define ST_DEBUG 0
+#define DBSTR(x) ""
+#endif
+
+void st_debug_init( void );
+
+static INLINE void
+ST_DBG( unsigned flag, const char *fmt, ... )
+{
+    if (ST_DEBUG & flag)
+    {
+        va_list args;
+
+        va_start( args, fmt );
+        debug_vprintf( fmt, args );
+        va_end( args );
+    }
+}
+
+
 #endif /* ST_DEBUG_H */

src/mesa/state_tracker/st_gen_mipmap.c

@@ -42,6 +42,7 @@
 #include "cso_cache/cso_cache.h"
 #include "cso_cache/cso_context.h"
 
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_draw.h"
 #include "st_gen_mipmap.h"
@@ -113,6 +114,9 @@ fallback_generate_mipmap(GLcontext *ctx, GLenum target,
    uint dstLevel;
    GLenum datatype;
    GLuint comps;
+   
+   if (ST_DEBUG & DEBUG_FALLBACK)
+      debug_printf("%s: fallback processing\n", __FUNCTION__);
 
    assert(target != GL_TEXTURE_3D); /* not done yet */
 

src/mesa/state_tracker/st_program.c

@@ -42,6 +42,7 @@
 #include "draw/draw_context.h"
 #include "tgsi/tgsi_dump.h"
 
+#include "st_debug.h"
 #include "st_context.h"
 #include "st_atom.h"
 #include "st_program.h"
@@ -49,9 +50,6 @@
 #include "cso_cache/cso_context.h"
 
 
-#define TGSI_DEBUG 0
-
-
 /**
  * Translate a Mesa vertex shader into a TGSI shader.
  * \param outputMapping  to map vertex program output registers (VERT_RESULT_x)
@@ -346,11 +344,15 @@ st_translate_vertex_program(struct st_context *st,
    stvp->num_inputs = vs_num_inputs;
    stvp->driver_shader = pipe->create_vs_state(pipe, &stvp->state);
 
-   if (0)
+   if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
       _mesa_print_program(&stvp->Base.Base);
+      debug_printf("\n");
+   }
 
-   if (TGSI_DEBUG)
+   if (ST_DEBUG & DEBUG_TGSI) {
       tgsi_dump( stvp->state.tokens, 0 );
+      debug_printf("\n");
+   }
 }
 
 
@@ -526,11 +528,15 @@ st_translate_fragment_program(struct st_context *st,
 
    stfp->driver_shader = pipe->create_fs_state(pipe, &stfp->state);
 
-   if (0)
+   if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
       _mesa_print_program(&stfp->Base.Base);
+      debug_printf("\n");
+   }
 
-   if (TGSI_DEBUG)
+   if (ST_DEBUG & DEBUG_TGSI) {
       tgsi_dump( stfp->state.tokens, 0/*TGSI_DUMP_VERBOSE*/ );
+      debug_printf("\n");
+   }
 }