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#include <clutter/clutter.h>
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#include "test-conform-common.h"
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static const ClutterColor stage_color = { 0x0, 0x0, 0x0, 0xff };
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#define MASK_RED(COLOR) ((COLOR & 0xff000000) >> 24);
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#define MASK_GREEN(COLOR) ((COLOR & 0xff0000) >> 16);
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#define MASK_BLUE(COLOR) ((COLOR & 0xff00) >> 8);
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#define MASK_ALPHA(COLOR) (COLOR & 0xff);
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#define BLEND_CONSTANT_UNUSED 0xDEADBEEF
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#define TEX_CONSTANT_UNUSED 0xDEADBEEF
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typedef struct _TestState
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ClutterGeometry stage_geom;
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check_pixel (GLubyte *pixel, guint32 color)
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guint8 r = MASK_RED (color);
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guint8 g = MASK_GREEN (color);
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guint8 b = MASK_BLUE (color);
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guint8 a = MASK_ALPHA (color);
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if (g_test_verbose ())
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g_print (" expected = %x, %x, %x, %x\n",
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/* FIXME - allow for hardware in-precision */
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g_assert_cmpint (pixel[RED], ==, r);
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g_assert_cmpint (pixel[GREEN], ==, g);
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g_assert_cmpint (pixel[BLUE], ==, b);
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* We ignore the alpha, since we don't know if our render target is
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/* g_assert (pixel[ALPHA] == a); */
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test_blend (TestState *state,
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const char *blend_string,
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guint32 blend_constant,
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guint32 expected_result)
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guint8 Sr = MASK_RED (src_color);
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guint8 Sg = MASK_GREEN (src_color);
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guint8 Sb = MASK_BLUE (src_color);
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guint8 Sa = MASK_ALPHA (src_color);
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guint8 Dr = MASK_RED (dst_color);
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guint8 Dg = MASK_GREEN (dst_color);
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guint8 Db = MASK_BLUE (dst_color);
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guint8 Da = MASK_ALPHA (dst_color);
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/* blend constant - when applicable */
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guint8 Br = MASK_RED (blend_constant);
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guint8 Bg = MASK_GREEN (blend_constant);
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guint8 Bb = MASK_BLUE (blend_constant);
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guint8 Ba = MASK_ALPHA (blend_constant);
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CoglColor blend_const_color;
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/* First write out the destination color without any blending... */
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material = cogl_material_new ();
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cogl_material_set_color4ub (material, Dr, Dg, Db, Da);
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cogl_material_set_blend (material, "RGBA = ADD (SRC_COLOR, 0)", NULL);
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cogl_set_source (material);
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cogl_rectangle (x * QUAD_WIDTH,
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x * QUAD_WIDTH + QUAD_WIDTH,
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y * QUAD_WIDTH + QUAD_WIDTH);
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cogl_handle_unref (material);
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* Now blend a rectangle over our well defined destination:
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material = cogl_material_new ();
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cogl_material_set_color4ub (material, Sr, Sg, Sb, Sa);
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status = cogl_material_set_blend (material, blend_string, &error);
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/* It's not strictly a test failure; you need a more capable GPU or
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* driver to test this blend string. */
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g_debug ("Failed to test blend string %s: %s",
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blend_string, error->message);
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cogl_color_set_from_4ub (&blend_const_color, Br, Bg, Bb, Ba);
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cogl_material_set_blend_constant (material, &blend_const_color);
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cogl_set_source (material);
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cogl_rectangle (x * QUAD_WIDTH,
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x * QUAD_WIDTH + QUAD_WIDTH,
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y * QUAD_WIDTH + QUAD_WIDTH);
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cogl_handle_unref (material);
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/* See what we got... */
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y_off = y * QUAD_WIDTH + (QUAD_WIDTH / 2);
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x_off = x * QUAD_WIDTH + (QUAD_WIDTH / 2);
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* We haven't always had good luck with GL drivers implementing glReadPixels
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* reliably and skipping the first two frames improves our chances... */
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if (state->frame <= 2)
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cogl_read_pixels (x_off, y_off, 1, 1,
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COGL_READ_PIXELS_COLOR_BUFFER,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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if (g_test_verbose ())
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g_print ("test_blend (%d, %d):\n%s\n", x, y, blend_string);
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g_print (" src color = %02x, %02x, %02x, %02x\n", Sr, Sg, Sb, Sa);
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g_print (" dst color = %02x, %02x, %02x, %02x\n", Dr, Dg, Db, Da);
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if (blend_constant != BLEND_CONSTANT_UNUSED)
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g_print (" blend constant = %02x, %02x, %02x, %02x\n",
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g_print (" blend constant = UNUSED\n");
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g_print (" result = %x, %x, %x, %x\n",
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pixel[RED], pixel[GREEN], pixel[BLUE], pixel[ALPHA]);
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check_pixel (pixel, expected_result);
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make_texture (guint32 color)
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guchar *tex_data, *p;
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guint8 r = MASK_RED (color);
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guint8 g = MASK_GREEN (color);
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guint8 b = MASK_BLUE (color);
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guint8 a = MASK_ALPHA (color);
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tex_data = g_malloc (QUAD_WIDTH * QUAD_WIDTH * 4);
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for (p = tex_data + QUAD_WIDTH * QUAD_WIDTH * 4; p > tex_data;)
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/* Note: we don't use COGL_PIXEL_FORMAT_ANY for the internal format here
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* since we don't want to allow Cogl to premultiply our data. */
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tex = cogl_texture_new_from_data (QUAD_WIDTH,
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COGL_PIXEL_FORMAT_RGBA_8888,
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COGL_PIXEL_FORMAT_RGBA_8888,
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test_tex_combine (TestState *state,
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guint32 combine_constant,
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const char *combine_string,
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guint32 expected_result)
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CoglHandle tex0, tex1;
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/* combine constant - when applicable */
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guint8 Cr = MASK_RED (combine_constant);
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guint8 Cg = MASK_GREEN (combine_constant);
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guint8 Cb = MASK_BLUE (combine_constant);
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guint8 Ca = MASK_ALPHA (combine_constant);
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CoglColor combine_const_color;
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GError *error = NULL;
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tex0 = make_texture (tex0_color);
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tex1 = make_texture (tex1_color);
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material = cogl_material_new ();
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cogl_material_set_color4ub (material, 0x80, 0x80, 0x80, 0x80);
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cogl_material_set_blend (material, "RGBA = ADD (SRC_COLOR, 0)", NULL);
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cogl_material_set_layer (material, 0, tex0);
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cogl_material_set_layer_combine (material, 0,
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"RGBA = REPLACE (TEXTURE)", NULL);
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cogl_material_set_layer (material, 1, tex1);
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status = cogl_material_set_layer_combine (material, 1,
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combine_string, &error);
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/* It's not strictly a test failure; you need a more capable GPU or
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* driver to test this texture combine string. */
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g_debug ("Failed to test texture combine string %s: %s",
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combine_string, error->message);
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cogl_color_set_from_4ub (&combine_const_color, Cr, Cg, Cb, Ca);
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cogl_material_set_layer_combine_constant (material, 1, &combine_const_color);
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cogl_set_source (material);
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cogl_rectangle (x * QUAD_WIDTH,
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x * QUAD_WIDTH + QUAD_WIDTH,
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y * QUAD_WIDTH + QUAD_WIDTH);
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cogl_handle_unref (material);
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cogl_handle_unref (tex0);
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cogl_handle_unref (tex1);
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/* See what we got... */
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y_off = y * QUAD_WIDTH + (QUAD_WIDTH / 2);
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x_off = x * QUAD_WIDTH + (QUAD_WIDTH / 2);
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* We haven't always had good luck with GL drivers implementing glReadPixels
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* reliably and skipping the first two frames improves our chances... */
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if (state->frame <= 2)
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cogl_read_pixels (x_off, y_off, 1, 1,
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COGL_READ_PIXELS_COLOR_BUFFER,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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if (g_test_verbose ())
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g_print ("test_tex_combine (%d, %d):\n%s\n", x, y, combine_string);
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g_print (" texture 0 color = 0x%08lX\n", (unsigned long)tex0_color);
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g_print (" texture 1 color = 0x%08lX\n", (unsigned long)tex1_color);
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if (combine_constant != TEX_CONSTANT_UNUSED)
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g_print (" combine constant = %02x, %02x, %02x, %02x\n",
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g_print (" combine constant = UNUSED\n");
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g_print (" result = %02x, %02x, %02x, %02x\n",
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pixel[RED], pixel[GREEN], pixel[BLUE], pixel[ALPHA]);
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check_pixel (pixel, expected_result);
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on_paint (ClutterActor *actor, TestState *state)
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test_blend (state, 0, 0, /* position */
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0xff0000ff, /* src */
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0xffffffff, /* dst */
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"RGBA = ADD (SRC_COLOR, 0)",
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BLEND_CONSTANT_UNUSED,
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0xff0000ff); /* expected */
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test_blend (state, 1, 0, /* position */
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0x11223344, /* src */
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0x11223344, /* dst */
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"RGBA = ADD (SRC_COLOR, DST_COLOR)",
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BLEND_CONSTANT_UNUSED,
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0x22446688); /* expected */
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test_blend (state, 2, 0, /* position */
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0x80808080, /* src */
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0xffffffff, /* dst */
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"RGBA = ADD (SRC_COLOR * (CONSTANT), 0)",
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0x80808080, /* constant (RGBA all = 0.5 when normalized) */
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0x40404040); /* expected */
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test_blend (state, 3, 0, /* position */
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0x80000080, /* src (alpha = 0.5 when normalized) */
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0x40000000, /* dst */
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"RGBA = ADD (SRC_COLOR * (SRC_COLOR[A]),"
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" DST_COLOR * (1-SRC_COLOR[A]))",
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BLEND_CONSTANT_UNUSED,
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0x60000040); /* expected */
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* For all texture combine tests tex0 will use a combine mode of
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* "RGBA = REPLACE (TEXTURE)"
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test_tex_combine (state, 4, 0, /* position */
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0x11111111, /* texture 0 color */
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0x22222222, /* texture 1 color */
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"RGBA = ADD (PREVIOUS, TEXTURE)", /* tex combine */
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0x33333333); /* expected */
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test_tex_combine (state, 5, 0, /* position */
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0x40404040, /* texture 0 color */
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0x80808080, /* texture 1 color (RGBA all = 0.5) */
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"RGBA = MODULATE (PREVIOUS, TEXTURE)", /* tex combine */
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0x20202020); /* expected */
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test_tex_combine (state, 6, 0, /* position */
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0xffffff80, /* texture 0 color (alpha = 0.5) */
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0xDEADBE40, /* texture 1 color */
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"RGB = REPLACE (PREVIOUS)"
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"A = MODULATE (PREVIOUS, TEXTURE)", /* tex combine */
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0xffffff20); /* expected */
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/* XXX: we are assuming test_tex_combine creates a material with
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* a color of 0x80808080 (i.e. the "PRIMARY" color) */
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test_tex_combine (state, 7, 0, /* position */
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0xffffff80, /* texture 0 color (alpha = 0.5) */
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0xDEADBE20, /* texture 1 color */
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"RGB = REPLACE (PREVIOUS)"
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"A = MODULATE (PRIMARY, TEXTURE)", /* tex combine */
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0xffffff10); /* expected */
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test_tex_combine (state, 8, 0, /* position */
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0x11111111, /* texture 0 color */
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0x22222222, /* texture 1 color */
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"RGBA = ADD (PREVIOUS, 1-TEXTURE)", /* tex combine */
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0xeeeeeeee); /* expected */
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/* this is again assuming a primary color of 0x80808080 */
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test_tex_combine (state, 9, 0, /* position */
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0x10101010, /* texture 0 color */
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0x20202020, /* texture 1 color */
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"RGBA = INTERPOLATE (PREVIOUS, TEXTURE, PRIMARY)",
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0x18181818); /* expected */
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#if 0 /* using TEXTURE_N appears to be broken in cogl-blend-string.c */
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test_tex_combine (state, 0, 1, /* position */
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0xDEADBEEF, /* texture 0 color (not used) */
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0x11223344, /* texture 1 color */
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"RGBA = ADD (TEXTURE_1, TEXTURE)", /* tex combine */
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0x22446688); /* expected */
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test_tex_combine (state, 1, 1, /* position */
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0x21314151, /* texture 0 color */
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0x99999999, /* texture 1 color */
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"RGBA = ADD_SIGNED (PREVIOUS, TEXTURE)", /* tex combine */
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0x3a4a5a6a); /* expected */
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test_tex_combine (state, 2, 1, /* position */
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0xfedcba98, /* texture 0 color */
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0x11111111, /* texture 1 color */
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"RGBA = SUBTRACT (PREVIOUS, TEXTURE)", /* tex combine */
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0xedcba987); /* expected */
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test_tex_combine (state, 3, 1, /* position */
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0x8899aabb, /* texture 0 color */
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0xbbaa9988, /* texture 1 color */
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"RGB = DOT3_RGBA (PREVIOUS, TEXTURE)"
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"A = REPLACE (PREVIOUS)",
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0x2a2a2abb); /* expected */
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/* XXX: Experiments have shown that for some buggy drivers, when using
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* glReadPixels there is some kind of race, so we delay our test for a
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* few frames and a few seconds:
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frame_num = state->frame++;
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g_usleep (G_USEC_PER_SEC);
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/* Comment this out if you want visual feedback for what this test paints */
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clutter_main_quit ();
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queue_redraw (gpointer stage)
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clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
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test_cogl_blend_strings (TestConformSimpleFixture *fixture,
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stage = clutter_stage_get_default ();
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clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
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clutter_actor_get_geometry (stage, &state.stage_geom);
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group = clutter_group_new ();
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), group);
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/* We force continuous redrawing of the stage, since we need to skip
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* the first few frames, and we wont be doing anything else that
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* will trigger redrawing. */
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idle_source = g_idle_add (queue_redraw, stage);
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g_signal_connect (group, "paint", G_CALLBACK (on_paint), &state);
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clutter_actor_show_all (stage);
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g_source_remove (idle_source);
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if (g_test_verbose ())
added
removed
tests/conform/test-cogl-blend-strings.c
