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test-just-vertex-shader: Sample a texture in the fragment pipeline

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Previously the layer combine on the test pipeline was set up to
replace the incoming color with the layer constant. This patch changes
it to sample the replacement color from a 1x1 texture instead. This
exposes a bug on the GLES2 backend where the vertex shader will be
generated with a size for cogl_tex_coord_out of 4 but the
corresponding declaration in the fragment shader will have n_layers,
which is 1. This makes the program fail to link and the test fails.

https://bugzilla.gnome.org/show_bug.cgi?id=662184

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2011-10-19 11:04:51 +01:00
parent 757916f17a
commit 884647071c
1 changed files with 31 additions and 10 deletions
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41
tests/conform/test-just-vertex-shader.c
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@ -9,10 +9,26 @@ typedef struct _TestState
int dummy;
} TestState;
static CoglHandle
create_dummy_texture (void)
{
/* Create a dummy 1x1 green texture to replace the color from the
vertex shader */
static const guint8 data[4] = { 0x00, 0xff, 0x00, 0xff };
return cogl_texture_new_from_data (1, 1, /* size */
COGL_TEXTURE_NONE,
COGL_PIXEL_FORMAT_RGB_888,
COGL_PIXEL_FORMAT_ANY,
4, /* rowstride */
data);
}
static void
paint_legacy (TestState *state)
{
CoglHandle material = cogl_material_new ();
CoglHandle tex;
CoglColor color;
GError *error = NULL;
CoglHandle shader, program;
@ -25,14 +41,15 @@ paint_legacy (TestState *state)
cogl_material_set_color (material, &color);
/* Override the vertex color in the texture environment with a
constant green color */
cogl_color_set_from_4ub (&color, 0x00, 0xff, 0x00, 0xff);
cogl_material_set_layer_combine_constant (material, 0, &color);
constant green color provided by a texture */
tex = create_dummy_texture ();
cogl_material_set_layer (material, 0, tex);
cogl_handle_unref (tex);
if (!cogl_material_set_layer_combine (material, 0,
"RGBA=REPLACE(CONSTANT)",
"RGBA=REPLACE(TEXTURE)",
&error))
{
g_warning ("Error setting blend constant: %s", error->message);
g_warning ("Error setting layer combine: %s", error->message);
g_assert_not_reached ();
}
@ -47,6 +64,7 @@ paint_legacy (TestState *state)
"cogl_modelview_projection_matrix * "
"cogl_position_in;\n"
" cogl_color_out = cogl_color_in;\n"
" cogl_tex_coord_out[0] = cogl_tex_coord_in;\n"
"}\n");
cogl_shader_compile (shader);
if (!cogl_shader_is_compiled (shader))
@ -80,6 +98,7 @@ static void
paint (TestState *state)
{
CoglPipeline *pipeline = cogl_pipeline_new ();
CoglHandle tex;
CoglColor color;
GError *error = NULL;
CoglHandle shader, program;
@ -92,14 +111,15 @@ paint (TestState *state)
cogl_pipeline_set_color (pipeline, &color);
/* Override the vertex color in the texture environment with a
constant green color */
cogl_color_set_from_4ub (&color, 0x00, 0xff, 0x00, 0xff);
cogl_pipeline_set_layer_combine_constant (pipeline, 0, &color);
constant green color provided by a texture */
tex = create_dummy_texture ();
cogl_pipeline_set_layer_texture (pipeline, 0, tex);
cogl_handle_unref (tex);
if (!cogl_pipeline_set_layer_combine (pipeline, 0,
"RGBA=REPLACE(CONSTANT)",
"RGBA=REPLACE(TEXTURE)",
&error))
{
g_warning ("Error setting blend constant: %s", error->message);
g_warning ("Error setting layer combine: %s", error->message);
g_assert_not_reached ();
}
@ -114,6 +134,7 @@ paint (TestState *state)
"cogl_modelview_projection_matrix * "
"cogl_position_in;\n"
" cogl_color_out = cogl_color_in;\n"
" cogl_tex_coord_out[0] = cogl_tex_coord_in;\n"
"}\n");
cogl_shader_compile (shader);
if (!cogl_shader_is_compiled (shader))