#include #include #include "test-conform-common.h" /* This test verifies that modifying a vertex buffer works, by updating * vertex positions, and deleting and re-adding different color attributes. * * If you want visual feedback of what this test paints for debugging purposes, * then remove the call to clutter_main_quit() in validate_result. */ typedef struct _TestState { CoglHandle buffer; ClutterGeometry stage_geom; } TestState; static void validate_result (TestState *state) { GLubyte pixel[4]; GLint y_off = 90; /* NB: We ignore the alpha, since we don't know if our render target is * RGB or RGBA */ #define RED 0 #define GREEN 1 #define BLUE 2 /* Should see a red pixel */ cogl_read_pixels (110, y_off, 1, 1, COGL_READ_PIXELS_COLOR_BUFFER, COGL_PIXEL_FORMAT_RGBA_8888_PRE, pixel); if (g_test_verbose ()) g_print ("pixel 0 = %x, %x, %x\n", pixel[RED], pixel[GREEN], pixel[BLUE]); g_assert (pixel[RED] != 0 && pixel[GREEN] == 0 && pixel[BLUE] == 0); /* Should see a green pixel */ cogl_read_pixels (210, y_off, 1, 1, COGL_READ_PIXELS_COLOR_BUFFER, COGL_PIXEL_FORMAT_RGBA_8888_PRE, pixel); if (g_test_verbose ()) g_print ("pixel 1 = %x, %x, %x\n", pixel[RED], pixel[GREEN], pixel[BLUE]); g_assert (pixel[RED] == 0 && pixel[GREEN] != 0 && pixel[BLUE] == 0); #undef RED #undef GREEN #undef BLUE /* Comment this out if you want visual feedback of what this test * paints. */ clutter_main_quit (); } static void on_paint (ClutterActor *actor, TestState *state) { GLfloat triangle_verts[3][2] = { {100.0, 0.0}, {200.0, 100.0}, {100.0, 100.0} }; GLbyte triangle_colors[3][4] = { {0x00, 0xff, 0x00, 0xff}, /* blue */ {0x00, 0xff, 0x00, 0x00}, /* transparent blue */ {0x00, 0xff, 0x00, 0x00} /* transparent blue */ }; /* * Draw a red triangle */ cogl_set_source_color4ub (0xff, 0x00, 0x00, 0xff); cogl_vertex_buffer_add (state->buffer, "gl_Vertex", 2, /* n components */ GL_FLOAT, FALSE, /* normalized */ 0, /* stride */ triangle_verts); cogl_vertex_buffer_delete (state->buffer, "gl_Color"); cogl_vertex_buffer_submit (state->buffer); cogl_vertex_buffer_draw (state->buffer, GL_TRIANGLE_STRIP, /* mode */ 0, /* first */ 3); /* count */ /* * Draw a faded green triangle */ cogl_vertex_buffer_add (state->buffer, "gl_Color", 4, /* n components */ GL_UNSIGNED_BYTE, FALSE, /* normalized */ 0, /* stride */ triangle_colors); cogl_vertex_buffer_submit (state->buffer); cogl_translate (100, 0, 0); cogl_vertex_buffer_draw (state->buffer, GL_TRIANGLE_STRIP, /* mode */ 0, /* first */ 3); /* count */ validate_result (state); } static gboolean queue_redraw (gpointer stage) { clutter_actor_queue_redraw (CLUTTER_ACTOR (stage)); return TRUE; } void test_cogl_vertex_buffer_mutability (TestUtilsGTestFixture *fixture, void *data) { TestState state; ClutterActor *stage; ClutterColor stage_clr = {0x0, 0x0, 0x0, 0xff}; ClutterActor *group; unsigned int idle_source; stage = clutter_stage_get_default (); clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_clr); clutter_actor_get_geometry (stage, &state.stage_geom); group = clutter_group_new (); clutter_actor_set_size (group, state.stage_geom.width, state.stage_geom.height); clutter_container_add_actor (CLUTTER_CONTAINER (stage), group); /* We force continuous redrawing incase someone comments out the * clutter_main_quit and wants visual feedback for the test since we * wont be doing anything else that will trigger redrawing. */ idle_source = g_idle_add (queue_redraw, stage); g_signal_connect (group, "paint", G_CALLBACK (on_paint), &state); { GLfloat triangle_verts[3][2] = { {0.0, 0.0}, {100.0, 100.0}, {0.0, 100.0} }; GLbyte triangle_colors[3][4] = { {0x00, 0x00, 0xff, 0xff}, /* blue */ {0x00, 0x00, 0xff, 0x00}, /* transparent blue */ {0x00, 0x00, 0xff, 0x00} /* transparent blue */ }; state.buffer = cogl_vertex_buffer_new (3 /* n vertices */); cogl_vertex_buffer_add (state.buffer, "gl_Vertex", 2, /* n components */ GL_FLOAT, FALSE, /* normalized */ 0, /* stride */ triangle_verts); cogl_vertex_buffer_add (state.buffer, "gl_Color", 4, /* n components */ GL_UNSIGNED_BYTE, FALSE, /* normalized */ 0, /* stride */ triangle_colors); cogl_vertex_buffer_submit (state.buffer); } clutter_actor_show_all (stage); clutter_main (); cogl_handle_unref (state.buffer); g_source_remove (idle_source); if (g_test_verbose ()) g_print ("OK\n"); }