Added a support for loading a png file into a buffer (#823)

This CL adds the `FILE` parameter to `BUFFER` commands. This allows loading file data into the buffer. Currently only PNG data is supported.

3 files changed, 67 insertions, 1 deletions

diff --git a/tests/cases/draw_png_texture.amber b/tests/cases/draw_png_texture.amber
new file mode 100644
index 0000000..c7b9885
--- /dev/null
+++ b/tests/cases/draw_png_texture.amber
@@ -0,0 +1,66 @@
+#!amber
+# Copyright 2020 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+SHADER vertex vert_shader_tex GLSL
+#version 430
+layout(location = 0) in vec4 position;
+layout(location = 1) in vec2 texcoords_in;
+layout(location = 0) out vec2 texcoords_out;
+void main() {
+  gl_Position = position;
+  texcoords_out = texcoords_in;
+}
+END
+
+SHADER fragment frag_shader_tex GLSL
+#version 430
+layout(location = 0) in vec2 texcoords_in;
+layout(location = 0) out vec4 color_out;
+uniform layout(set=0, binding=0) sampler2D tex_sampler;
+void main() {
+  color_out = texture(tex_sampler, texcoords_in);
+}
+END
+
+BUFFER texture FORMAT R8G8B8A8_UNORM FILE texture.png
+BUFFER framebuffer FORMAT B8G8R8A8_UNORM
+SAMPLER sampler
+BUFFER position DATA_TYPE vec2<float> DATA
+-0.75 -0.75
+ 0.75 -0.75
+ 0.75  0.75
+-0.75  0.75
+END
+BUFFER texcoords DATA_TYPE vec2<float> DATA
+0.0 0.0
+1.0 0.0
+1.0 1.0
+0.0 1.0
+END
+
+PIPELINE graphics pipeline
+  ATTACH vert_shader_tex
+  ATTACH frag_shader_tex
+  BIND BUFFER texture AS combined_image_sampler SAMPLER sampler DESCRIPTOR_SET 0 BINDING 0
+  VERTEX_DATA position LOCATION 0
+  VERTEX_DATA texcoords LOCATION 1
+  FRAMEBUFFER_SIZE 256 256
+  BIND BUFFER framebuffer AS color LOCATION 0
+END
+
+# Draw the texture using a default sampler.
+CLEAR_COLOR pipeline 0 255 0 255
+CLEAR pipeline
+RUN pipeline DRAW_ARRAY AS TRIANGLE_FAN START_IDX 0 COUNT 4
diff --git a/tests/cases/texture.png b/tests/cases/texture.png
new file mode 100644
index 0000000..465bf9a
--- /dev/null
+++ b/tests/cases/texture.png
diff --git a/tests/run_tests.py b/tests/run_tests.py
index b3903cd..6b17f56 100755
--- a/tests/run_tests.py
+++ b/tests/run_tests.py
@@ -323,7 +323,7 @@ class TestRunner:
       print("--test-prog-path must point to an executable")
       return 1
 
-    input_file_re = re.compile('^.+[.][amber|vkscript]')
+    input_file_re = re.compile('^.+[\.]amber|vkscript')
     self.test_cases = []
 
     if self.args: