Merge remote branch 'master' into texture-debugging

Conflicts:
	clutter/cogl/cogl/cogl-context.h

cogl/cogl-context.h

@@ -115,6 +115,12 @@ typedef struct
   CoglAtlas        *atlas;
   CoglHandle        atlas_texture;
 
+  /* This debugging variable is used to pick a colour for visually
+     displaying the quad batches. It needs to be global so that it can
+     be reset by cogl_clear. It needs to be reset to increase the
+     chances of getting the same colour during an animation */
+  guint8            journal_rectangles_color;
+
   CoglContextDriver drv;
 } CoglContext;
 

cogl/cogl-internal.h

@@ -101,6 +101,8 @@ CoglTextureUnit *
 _cogl_get_texture_unit (int index_);
 void
 _cogl_destroy_texture_units (void);
+guint
+_cogl_get_max_texture_image_units (void);
 
 void
 _cogl_flush_face_winding (void);

cogl/cogl-journal.c

@@ -225,30 +225,51 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
     }
 #endif
 
-  /* DEBUGGING CODE XXX:
-   * This path will cause all rectangles to be drawn with a red, green
-   * or blue outline with no blending. This may e.g. help with debugging
-   * texture slicing issues or blending issues, plus it looks quite cool.
+  /* DEBUGGING CODE XXX: This path will cause all rectangles to be
+   * drawn with a coloured outline. Each batch will be rendered with
+   * the same color. This may e.g. help with debugging texture slicing
+   * issues, visually seeing what is batched and debugging blending
+   * issues, plus it looks quite cool.
    */
   if (cogl_debug_flags & COGL_DEBUG_RECTANGLES)
     {
       static CoglHandle outline = COGL_INVALID_HANDLE;
-      static int color = 0;
+      guint8 color_intensity;
       int i;
+
+      _COGL_GET_CONTEXT (ctxt, NO_RETVAL);
+
       if (outline == COGL_INVALID_HANDLE)
         outline = cogl_material_new ();
 
+      /* The least significant three bits represent the three
+         components so that the order of colours goes red, green,
+         yellow, blue, magenta, cyan. Black and white are skipped. The
+         next two bits give four scales of intensity for those colours
+         in the order 0xff, 0xcc, 0x99, and 0x66. This gives a total
+         of 24 colours. If there are more than 24 batches on the stage
+         then it will wrap around */
+      color_intensity = 0xff - 0x33 * (ctxt->journal_rectangles_color >> 3);
+      cogl_material_set_color4ub (outline,
+                                  (ctxt->journal_rectangles_color & 1) ?
+                                  color_intensity : 0,
+                                  (ctxt->journal_rectangles_color & 2) ?
+                                  color_intensity : 0,
+                                  (ctxt->journal_rectangles_color & 4) ?
+                                  color_intensity : 0,
+                                  0xff);
+      _cogl_material_flush_gl_state (outline, NULL);
       cogl_enable (COGL_ENABLE_VERTEX_ARRAY);
-      for (i = 0; i < batch_len; i++, color = (color + 1) % 3)
-        {
-          cogl_material_set_color4ub (outline,
-                                      color == 0 ? 0xff : 0x00,
-                                      color == 1 ? 0xff : 0x00,
-                                      color == 2 ? 0xff : 0x00,
-                                      0xff);
-          _cogl_material_flush_gl_state (outline, NULL);
-          GE( glDrawArrays (GL_LINE_LOOP, 4 * i, 4) );
-        }
+      for (i = 0; i < batch_len; i++)
+        GE( glDrawArrays (GL_LINE_LOOP, 4 * i + state->vertex_offset, 4) );
+
+      /* Go to the next color */
+      do
+        ctxt->journal_rectangles_color = ((ctxt->journal_rectangles_color + 1) &
+                                          ((1 << 5) - 1));
+      /* We don't want to use black or white */
+      while ((ctxt->journal_rectangles_color & 0x07) == 0
+             || (ctxt->journal_rectangles_color & 0x07) == 0x07);
     }
 
   state->vertex_offset += (4 * batch_len);
@@ -779,8 +800,7 @@ _cogl_journal_log_quad (float         x_1,
   if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_SOFTWARE_TRANSFORM))
     cogl_get_modelview_matrix (&entry->model_view);
 
-  if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_BATCHING
-                  || cogl_debug_flags & COGL_DEBUG_RECTANGLES))
+  if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_BATCHING))
     _cogl_journal_flush ();
 
   COGL_TIMER_STOP (_cogl_uprof_context, log_timer);

cogl/cogl-material.c

@@ -48,12 +48,6 @@
 #include "../gles/cogl-gles2-wrapper.h"
 #endif
 
-#ifdef HAVE_COGL_GLES
-#define COGL_MATERIAL_MAX_TEXTURE_UNITS GL_MAX_TEXTURE_UNITS
-#else
-#define COGL_MATERIAL_MAX_TEXTURE_UNITS GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
-#endif
-
 #ifdef HAVE_COGL_GL
 #define glActiveTexture ctx->drv.pf_glActiveTexture
 #define glClientActiveTexture ctx->drv.pf_glClientActiveTexture
@@ -828,7 +822,7 @@ cogl_material_set_layer (CoglHandle material_handle,
   _cogl_material_pre_change_notify (material, FALSE, NULL);
 
   material->n_layers = g_list_length (material->layers);
-  if (material->n_layers >= COGL_MATERIAL_MAX_TEXTURE_UNITS)
+  if (material->n_layers >= _cogl_get_max_texture_image_units ())
     {
       if (!(material->flags & COGL_MATERIAL_FLAG_SHOWN_SAMPLER_WARNING))
 	{
@@ -1551,7 +1545,7 @@ _cogl_material_flush_layers_gl_state (CoglMaterial *material,
 
       layer->flags &= ~COGL_MATERIAL_LAYER_FLAG_DIRTY;
 
-      if ((i+1) >= COGL_MATERIAL_MAX_TEXTURE_UNITS)
+      if ((i+1) >= _cogl_get_max_texture_image_units ())
 	break;
     }
 

cogl/cogl-types.h

@@ -120,8 +120,8 @@ typedef struct _CoglTextureVertex       CoglTextureVertex;
  * @COGL_PIXEL_FORMAT_RGB_565: RGB, 16 bits
  * @COGL_PIXEL_FORMAT_RGBA_4444: RGBA, 16 bits
  * @COGL_PIXEL_FORMAT_RGBA_5551: RGBA, 16 bits
- * @COGL_PIXEL_FORMAT_YUV: FIXME
- * @COGL_PIXEL_FORMAT_G_8: FIXME
+ * @COGL_PIXEL_FORMAT_YUV: Not currently supported
+ * @COGL_PIXEL_FORMAT_G_8: Single luminance component
  * @COGL_PIXEL_FORMAT_RGB_888: RGB, 24 bits
  * @COGL_PIXEL_FORMAT_BGR_888: BGR, 24 bits
  * @COGL_PIXEL_FORMAT_RGBA_8888: RGBA, 32 bits
@@ -135,7 +135,23 @@ typedef struct _CoglTextureVertex       CoglTextureVertex;
  * @COGL_PIXEL_FORMAT_RGBA_4444_PRE: Premultiplied RGBA, 16 bits
  * @COGL_PIXEL_FORMAT_RGBA_5551_PRE: Premultiplied RGBA, 16 bits
  *
- * Pixel formats used by COGL.
+ * Pixel formats used by COGL. For the formats with a byte per
+ * component, the order of the components specify the order in
+ * increasing memory addresses. So for example
+ * %COGL_PIXEL_FORMAT_RGB_888 would have the red component in the
+ * lowest address, green in the next address and blue after that
+ * regardless of the endinanness of the system.
+ *
+ * For the 16-bit formats the component order specifies the order
+ * within a 16-bit number from most significant bit to least
+ * significant. So for %COGL_PIXEL_FORMAT_RGB_565, the red component
+ * would be in bits 11-15, the green component would be in 6-11 and
+ * the blue component would be in 1-5. Therefore the order in memory
+ * depends on the endianness of the system.
+ *
+ * When uploading a texture %COGL_PIXEL_FORMAT_ANY can be used as the
+ * internal format. Cogl will try to pick the best format to use
+ * internally and convert the texture data if necessary.
  *
  * Since: 0.8
  */

cogl/cogl-util.c

@@ -51,9 +51,9 @@
 int
 cogl_util_next_p2 (int a)
 {
-  int rval=1;
+  int rval = 1;
 
-  while(rval < a)
+  while (rval < a)
     rval <<= 1;
 
   return rval;
@@ -237,8 +237,8 @@ cogl_fixed_get_type (void)
       g_value_register_transform_func (_cogl_fixed_type, G_TYPE_FLOAT,
                                        cogl_value_transform_fixed_float);
       g_value_register_transform_func (G_TYPE_FLOAT, _cogl_fixed_type,
-
                                        cogl_value_transform_float_fixed);
+
       g_value_register_transform_func (_cogl_fixed_type, G_TYPE_DOUBLE,
                                        cogl_value_transform_fixed_double);
       g_value_register_transform_func (G_TYPE_DOUBLE, _cogl_fixed_type,

cogl/cogl-vertex-buffer.c

@@ -1512,7 +1512,7 @@ enable_state_for_drawing_buffer (CoglVertexBuffer *buffer)
   GLuint       generic_index = 0;
 #endif
   gulong       enable_flags = 0;
-  guint        max_texcoord_attrib_unit = 0;
+  guint        max_texcoord_attrib_unit = -1;
   const GList *layers;
   guint32      fallback_layers = 0;
   guint32      disable_layers = ~0;

cogl/cogl.c

@@ -40,6 +40,7 @@
 #include "cogl-winsys.h"
 #include "cogl-framebuffer-private.h"
 #include "cogl-matrix-private.h"
+#include "cogl-journal-private.h"
 
 #if defined (HAVE_COGL_GLES2) || defined (HAVE_COGL_GLES)
 #include "cogl-gles2-wrapper.h"
@@ -155,6 +156,16 @@ cogl_clear (const CoglColor *color, gulong buffers)
 
   glClear (gl_buffers);
 
+  /* This is a debugging variable used to visually display the quad
+     batches from the journal. It is reset here to increase the
+     chances of getting the same colours for each frame during an
+     animation */
+  if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_RECTANGLES))
+    {
+      _COGL_GET_CONTEXT (ctxt, NO_RETVAL);
+      ctxt->journal_rectangles_color = 1;
+    }
+
   COGL_NOTE (DRAW, "Clear end");
 }
 
@@ -729,10 +740,11 @@ cogl_end_gl (void)
 }
 
 static CoglTextureUnit *
-_cogl_texture_unit_new (void)
+_cogl_texture_unit_new (int index_)
 {
   CoglTextureUnit *unit = g_new0 (CoglTextureUnit, 1);
   unit->matrix_stack = _cogl_matrix_stack_new ();
+  unit->index = index_;
   return unit;
 }
 
@@ -766,7 +778,7 @@ _cogl_get_texture_unit (int index_)
   /* NB: if we now insert a new layer before l, that will maintain order.
    */
 
-  unit = _cogl_texture_unit_new ();
+  unit = _cogl_texture_unit_new (index_);
 
   /* Note: see comment after for() loop above */
   ctx->texture_units =
@@ -787,6 +799,36 @@ _cogl_destroy_texture_units (void)
   g_list_free (ctx->texture_units);
 }
 
+/*
+ * This is more complicated than that, another pass needs to be done when
+ * cogl have a neat way of saying if we are using the fixed function pipeline
+ * or not (for the GL case):
+ * MAX_TEXTURE_UNITS: fixed function pipeline, a texture unit has both a
+ *                    sampler and a set of texture coordinates
+ * MAX_TEXTURE_IMAGE_UNITS: number of samplers one can use from a fragment
+ *                          program/shader (ARBfp1.0 asm/GLSL)
+ * MAX_VERTEX_TEXTURE_UNITS: number of samplers one can use from a vertex
+ *                           program/shader (can be 0)
+ * MAX_COMBINED_TEXTURE_IMAGE_UNITS: Maximum samplers one can use, counting both
+ *                                   the vertex and fragment shaders
+ *
+ * If both the vertex shader and the fragment processing stage access the same
+ * texture image unit, then that counts as using two texture image units
+ * against the latter limit: http://www.opengl.org/sdk/docs/man/xhtml/glGet.xml
+ *
+ * Note that, for now, we use GL_MAX_TEXTURE_UNITS as we are exposing the
+ * fixed function pipeline.
+ */
+guint
+_cogl_get_max_texture_image_units (void)
+{
+  GLint nb_texture_image_units;
+
+  GE( glGetIntegerv(GL_MAX_TEXTURE_UNITS, &nb_texture_image_units) );
+
+  return nb_texture_image_units;
+}
+
 void
 cogl_push_matrix (void)
 {

doc/reference/cogl/blend-strings.xml

@@ -59,14 +59,13 @@ to this OpenGL code:
 <programlisting>
   glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
   glTexEnvi (GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE);
-  glTexEnvi (GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
   glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_RGB, GL_PREVIOUS);
   glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
   glTexEnvi (GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE);
-  glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_RGB, GL_PREVIOUS);
-  glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
-  glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_RGB, GL_TEXTURE);
-  glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
+  glTexEnvi (GL_TEXTURE_ENV, GL_SRC0_ALPHA, GL_PREVIOUS);
+  glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_COLOR);
+  glTexEnvi (GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE);
+  glTexEnvi (GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_COLOR);
 </programlisting>
 
 </section>