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[cogl] Ensure well defined semantics for COGL_INVALID_HANDLE material layers

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Fixes and adds a unit test for creating and drawing using materials with
COGL_INVALID_HANDLE texture layers.

This may be valid if for example the user has set a texture combine string
that only references a constant color.

_cogl_material_flush_layers_gl_state will bind the fallback texture for any
COGL_INVALID_HANDLE layer, later though we could explicitly check when the
current blend mode does't actually reference a texture source in which case
binding the fallback texture is redundant.

This tests drawing using cogl_rectangle, cogl_polygon and
cogl_vertex_buffer_draw.
This commit is contained in:
Robert Bragg 2009-06-19 12:15:12 +01:00
parent 4d55d146b3
commit fdc048ddd0
3 changed files with 44 additions and 11 deletions
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8
common/cogl-material.c
View File

@ -1336,7 +1336,13 @@ _cogl_material_flush_layers_gl_state (CoglMaterial *material,
(disable_mask & (1<<i)) ? TRUE : FALSE;
tex_handle = layer->texture;
cogl_texture_get_gl_texture (tex_handle, &gl_texture, &gl_target);
if (tex_handle != COGL_INVALID_HANDLE)
cogl_texture_get_gl_texture (tex_handle, &gl_texture, &gl_target);
else
{
new_gl_layer_info.fallback = TRUE;
gl_target = GL_TEXTURE_2D;
}
if (new_gl_layer_info.layer0_overridden)
gl_texture = layer0_override_texture;

37
common/cogl-primitives.c
View File

@ -942,7 +942,6 @@ _cogl_multitexture_unsliced_quad (float x_1,
for (tmp = (GList *)layers, i = 0; tmp != NULL; tmp = tmp->next, i++)
{
CoglHandle layer = (CoglHandle)tmp->data;
/* CoglLayerInfo *layer_info; */
CoglHandle tex_handle;
CoglTexture *tex;
const float *in_tex_coords;
@ -950,12 +949,13 @@ _cogl_multitexture_unsliced_quad (float x_1,
CoglTexSliceSpan *x_span;
CoglTexSliceSpan *y_span;
/* layer_info = &layers[i]; */
/* FIXME - we shouldn't be checking this stuff if layer_info->gl_texture
* already == 0 */
tex_handle = cogl_material_layer_get_texture (layer);
/* COGL_INVALID_HANDLE textures are handled by
* _cogl_material_flush_gl_state */
if (tex_handle == COGL_INVALID_HANDLE)
continue;
tex = _cogl_texture_pointer_from_handle (tex_handle);
in_tex_coords = &user_tex_coords[i * 4];
@ -1131,14 +1131,23 @@ _cogl_rectangles_with_multitexture_coords (
for (tmp = layers, i = 0; tmp != NULL; tmp = tmp->next, i++)
{
CoglHandle layer = tmp->data;
CoglHandle tex_handle = cogl_material_layer_get_texture (layer);
CoglTexture *texture = _cogl_texture_pointer_from_handle (tex_handle);
CoglHandle tex_handle;
CoglTexture *texture = NULL;
gulong flags;
if (cogl_material_layer_get_type (layer)
!= COGL_MATERIAL_LAYER_TYPE_TEXTURE)
continue;
tex_handle = cogl_material_layer_get_texture (layer);
/* COGL_INVALID_HANDLE textures are handled by
* _cogl_material_flush_gl_state */
if (tex_handle == COGL_INVALID_HANDLE)
continue;
texture = _cogl_texture_pointer_from_handle (tex_handle);
/* XXX:
* For now, if the first layer is sliced then all other layers are
* ignored since we currently don't support multi-texturing with
@ -1503,6 +1512,13 @@ _cogl_multitexture_unsliced_polygon (CoglTextureVertex *vertices,
float tx, ty;
tex_handle = cogl_material_layer_get_texture (layer);
/* COGL_INVALID_HANDLE textures will be handled in
* _cogl_material_flush_layers_gl_state but there is no need to worry
* about scaling texture coordinates in this case */
if (tex_handle == COGL_INVALID_HANDLE)
continue;
tex = _cogl_texture_pointer_from_handle (tex_handle);
y_span = &g_array_index (tex->slice_y_spans, CoglTexSliceSpan, 0);
@ -1585,6 +1601,11 @@ cogl_polygon (CoglTextureVertex *vertices,
CoglHandle layer = (CoglHandle)tmp->data;
CoglHandle tex_handle = cogl_material_layer_get_texture (layer);
/* COGL_INVALID_HANDLE textures will be handled in
* _cogl_material_flush_layers_gl_state */
if (tex_handle == COGL_INVALID_HANDLE)
continue;
if (i == 0 && cogl_texture_is_sliced (tex_handle))
{
#if defined (HAVE_COGL_GLES) || defined (HAVE_COGL_GLES2)

10
common/cogl-vertex-buffer.c
View File

@ -1618,8 +1618,14 @@ enable_state_for_drawing_buffer (CoglVertexBuffer *buffer)
{
CoglHandle layer = (CoglHandle)tmp->data;
CoglHandle tex_handle = cogl_material_layer_get_texture (layer);
CoglTexture *texture =
_cogl_texture_pointer_from_handle (tex_handle);
CoglTexture *texture;
/* invalid textures will be handled correctly in
* _cogl_material_flush_layers_gl_state */
if (tex_handle == COGL_INVALID_HANDLE)
continue;
texture = _cogl_texture_pointer_from_handle (tex_handle);
if (cogl_texture_is_sliced (tex_handle)
|| _cogl_texture_span_has_waste (texture, 0, 0))