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Add preliminary OpenGL ES and EGL support to Dawn.

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This is enough to get all of the sample apps running on a conformant ES 3.1 implementation, such as ANGLE/Vk or NVidia's OpenGL ES Linux driver.

Implements a new opengl::AdapterDiscoveryOptionsES subclass to specify its creation at adapter discovery time.
Adds a "-b opengles" command-line flag to the code samples.
Asserts on a call to glShaderStorageBlockBinding() on ES.
Works around missing indexed draw buffers support by asserting when a non-0 color attachment is specified.
Works around missing glClearTexSubImage() by asserting. :/
These will likely require front-end validation.

BUG=dawn:580
Change-Id: I4a4240ca695a22388c55073fd2aee0323cd4afc9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/31000
Reviewed-by: Stephen White <senorblanco@chromium.org>
Commit-Queue: Stephen White <senorblanco@chromium.org>
This commit is contained in:
Stephen White
2020-11-24 20:57:23 +00:00
committed by Commit Bot service account
parent 90bac683b4
commit 70102b7190
15 changed files with 113 additions and 40 deletions
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5
src/utils/GLFWUtils.cpp
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@@ -36,6 +36,11 @@ namespace utils {
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 4);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GLFW_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
} else if (type == wgpu::BackendType::OpenGLES) {
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
} else {
// Without this GLFW will initialize a GL context on the window, which prevents using
// the window with other APIs (by crashing in weird ways).