Support CHROMIUM_path_rendering
This is partial support for CHROMIUM_path_rendering
and implements basic path management and non-instanced
rendering.
BUG=angleproject:1382
Change-Id: I9c0e88183e0a915d522889323933439d25b45b5f
Reviewed-on: https://chromium-review.googlesource.com/348630
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/common/mathutil.cpp b/src/common/mathutil.cpp
index 927b6eb..acbcbdf 100644
--- a/src/common/mathutil.cpp
+++ b/src/common/mathutil.cpp
@@ -64,4 +64,4 @@
*blue = inputData->B * pow(2.0f, (int)inputData->E - g_sharedexp_bias - g_sharedexp_mantissabits);
}
-}
+} // namespace gl
diff --git a/src/common/mathutil.h b/src/common/mathutil.h
index 27329ba..06421f0 100644
--- a/src/common/mathutil.h
+++ b/src/common/mathutil.h
@@ -721,8 +721,42 @@
return ((bitCast<uint32_t>(f) & 0x7f800000u) == 0x7f800000u) && !(bitCast<uint32_t>(f) & 0x7fffffu);
}
+namespace priv
+{
+template <unsigned int N, unsigned int R>
+struct iSquareRoot
+{
+ static constexpr unsigned int solve()
+ {
+ return (R * R > N)
+ ? 0
+ : ((R * R == N) ? R : static_cast<unsigned int>(iSquareRoot<N, R + 1>::value));
+ }
+ enum Result
+ {
+ value = iSquareRoot::solve()
+ };
+};
+
+template <unsigned int N>
+struct iSquareRoot<N, N>
+{
+ enum result
+ {
+ value = N
+ };
+};
+
+} // namespace priv
+
+template <unsigned int N>
+constexpr unsigned int iSquareRoot()
+{
+ return priv::iSquareRoot<N, 1>::value;
}
+} // namespace gl
+
namespace rx
{
diff --git a/src/common/matrix_utils.h b/src/common/matrix_utils.h
index 6f3187c..aa3f895 100644
--- a/src/common/matrix_utils.h
+++ b/src/common/matrix_utils.h
@@ -16,6 +16,7 @@
#include <vector>
#include "common/debug.h"
+#include "common/mathutil.h"
namespace angle
{
@@ -337,6 +338,42 @@
return result;
}
+ void setToIdentity()
+ {
+ ASSERT(rows() == columns());
+
+ const auto one = T(1);
+ const auto zero = T(0);
+
+ for (auto &e : mElements)
+ e = zero;
+
+ for (unsigned int i = 0; i < rows(); ++i)
+ {
+ const auto pos = i * columns() + (i % columns());
+ mElements[pos] = one;
+ }
+ }
+
+ template <unsigned int Size>
+ static void setToIdentity(T(&matrix)[Size])
+ {
+ static_assert(gl::iSquareRoot<Size>() != 0, "Matrix is not square.");
+
+ const auto cols = gl::iSquareRoot<Size>();
+ const auto one = T(1);
+ const auto zero = T(0);
+
+ for (auto &e : matrix)
+ e = zero;
+
+ for (unsigned int i = 0; i < cols; ++i)
+ {
+ const auto pos = i * cols + (i % cols);
+ matrix[pos] = one;
+ }
+ }
+
private:
std::vector<T> mElements;
unsigned int mRows;