1 files changed, 123 insertions, 0 deletions
diff --git a/cogl/tests/conform/test-map-buffer-range.c b/cogl/tests/conform/test-map-buffer-range.c
new file mode 100644
index 000000000..e9792405f
--- /dev/null
+++ b/cogl/tests/conform/test-map-buffer-range.c
@@ -0,0 +1,123 @@
+#include <cogl/cogl.h>
+
+#include <string.h>
+
+#include "test-utils.h"
+
+static uint8_t
+tex_data[2 * 2 * 4] =
+  {
+    0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff,
+    0x00, 0x00, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff
+  };
+
+/* Vertex data for a quad with all of the texture coordinates set to
+ * the top left (red) pixel */
+static CoglVertexP2T2
+vertex_data[4] =
+  {
+    { -1, -1, 0, 0 },
+    { 1, -1, 0, 0 },
+    { -1, 1, 0, 0 },
+    { 1, 1, 0, 0 }
+  };
+
+void
+test_map_buffer_range (void)
+{
+  CoglTexture2D *tex;
+  CoglPipeline *pipeline;
+  int fb_width, fb_height;
+  CoglAttributeBuffer *buffer;
+  CoglVertexP2T2 *data;
+  CoglAttribute *pos_attribute;
+  CoglAttribute *tex_coord_attribute;
+  CoglPrimitive *primitive;
+
+  tex = cogl_texture_2d_new_from_data (test_ctx,
+                                       2, 2, /* width/height */
+                                       COGL_PIXEL_FORMAT_RGBA_8888_PRE,
+                                       2 * 4, /* rowstride */
+                                       tex_data,
+                                       NULL /* error */);
+
+  pipeline = cogl_pipeline_new (test_ctx);
+
+  cogl_pipeline_set_layer_texture (pipeline, 0, tex);
+  cogl_pipeline_set_layer_filters (pipeline,
+                                   0, /* layer */
+                                   COGL_PIPELINE_FILTER_NEAREST,
+                                   COGL_PIPELINE_FILTER_NEAREST);
+  cogl_pipeline_set_layer_wrap_mode (pipeline,
+                                     0, /* layer */
+                                     COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
+
+  fb_width = cogl_framebuffer_get_width (test_fb);
+  fb_height = cogl_framebuffer_get_height (test_fb);
+
+  buffer = cogl_attribute_buffer_new (test_ctx,
+                                      sizeof (vertex_data),
+                                      vertex_data);
+
+  /* Replace the texture coordinates of the third vertex with the
+   * coordinates for a green texel */
+  data = cogl_buffer_map_range (buffer,
+                                sizeof (vertex_data[0]) * 2,
+                                sizeof (vertex_data[0]),
+                                COGL_BUFFER_ACCESS_WRITE,
+                                COGL_BUFFER_MAP_HINT_DISCARD_RANGE,
+                                NULL); /* don't catch errors */
+  g_assert (data != NULL);
+
+  data->x = vertex_data[2].x;
+  data->y = vertex_data[2].y;
+  data->s = 1.0f;
+  data->t = 0.0f;
+
+  cogl_buffer_unmap (buffer);
+
+  pos_attribute =
+    cogl_attribute_new (buffer,
+                        "cogl_position_in",
+                        sizeof (vertex_data[0]),
+                        offsetof (CoglVertexP2T2, x),
+                        2, /* n_components */
+                        COGL_ATTRIBUTE_TYPE_FLOAT);
+  tex_coord_attribute =
+    cogl_attribute_new (buffer,
+                        "cogl_tex_coord_in",
+                        sizeof (vertex_data[0]),
+                        offsetof (CoglVertexP2T2, s),
+                        2, /* n_components */
+                        COGL_ATTRIBUTE_TYPE_FLOAT);
+
+  cogl_framebuffer_clear4f (test_fb,
+                            COGL_BUFFER_BIT_COLOR,
+                            0, 0, 0, 1);
+
+  primitive =
+    cogl_primitive_new (COGL_VERTICES_MODE_TRIANGLE_STRIP,
+                        4, /* n_vertices */
+                        pos_attribute,
+                        tex_coord_attribute,
+                        NULL);
+  cogl_primitive_draw (primitive, test_fb, pipeline);
+  cogl_object_unref (primitive);
+
+  /* Top left pixel should be the one that is replaced to be green */
+  test_utils_check_pixel (test_fb, 1, 1, 0x00ff00ff);
+  /* The other three corners should be left as red */
+  test_utils_check_pixel (test_fb, fb_width - 2, 1, 0xff0000ff);
+  test_utils_check_pixel (test_fb, 1, fb_height - 2, 0xff0000ff);
+  test_utils_check_pixel (test_fb, fb_width - 2, fb_height - 2, 0xff0000ff);
+
+  cogl_object_unref (buffer);
+  cogl_object_unref (pos_attribute);
+  cogl_object_unref (tex_coord_attribute);
+
+  cogl_object_unref (pipeline);
+  cogl_object_unref (tex);
+
+  if (cogl_test_verbose ())
+    g_print ("OK\n");
+}