mirror of
https://github.com/Jozufozu/Flywheel.git
synced 2025-02-12 21:25:01 +01:00
e2bcc5f325
- Switch to object oriented vertex array impl - Expose vao api similar to separate attribute format - For DSA, directly call methods - For 33, defer state changes until bindForDraw is called - Inline instanced mesh #drawInstances method in favor of more fine-grained control over binding order - Move buffer binding to GlStateTracker - Remove raw bindVAO(0) from indirect engine - Make VertexAttribute a sealed interface. - Fix ebo restore state by always updating it and never restoring it - Remove restore state wrapping in DrawCall - Also misc cleanup.
80 lines
2.5 KiB
Java
80 lines
2.5 KiB
Java
package com.jozufozu.flywheel.gl;
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import java.nio.ByteBuffer;
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import org.lwjgl.PointerBuffer;
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import org.lwjgl.opengl.GL;
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import org.lwjgl.opengl.GL20C;
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import org.lwjgl.opengl.GLCapabilities;
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import org.lwjgl.system.MemoryStack;
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import net.minecraft.Util;
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/**
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* An instance of this class stores information about what OpenGL features are available.
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* <br>
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* Each field stores an enum variant that provides access to the most appropriate version of a feature for the current
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* system.
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*/
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public class GlCompat {
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public static final boolean ALLOW_DSA = true;
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public static final GLCapabilities CAPABILITIES = GL.createCapabilities();
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private static final boolean amd = _decideIfWeAreAMDWindows();
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private static final boolean supportsIndirect = _decideIfWeSupportIndirect();
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private GlCompat() {
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}
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public static boolean onAMDWindows() {
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return amd;
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}
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public static boolean supportsInstancing() {
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return true;
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}
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public static boolean supportsIndirect() {
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return supportsIndirect;
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}
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private static boolean _decideIfWeSupportIndirect() {
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return CAPABILITIES.OpenGL46 || (CAPABILITIES.GL_ARB_compute_shader && CAPABILITIES.GL_ARB_shader_draw_parameters && CAPABILITIES.GL_ARB_base_instance && CAPABILITIES.GL_ARB_multi_draw_indirect && CAPABILITIES.GL_ARB_direct_state_access);
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}
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/**
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* Modified from:
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* <br> <a href="https://github.com/grondag/canvas/commit/820bf754092ccaf8d0c169620c2ff575722d7d96">canvas</a>
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*
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* <p>Identical in function to {@link GL20C#glShaderSource(int, CharSequence)} but
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* passes a null pointer for string length to force the driver to rely on the null
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* terminator for string length. This is a workaround for an apparent flaw with some
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* AMD drivers that don't receive or interpret the length correctly, resulting in
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* an access violation when the driver tries to read past the string memory.
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*
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* <p>Hat tip to fewizz for the find and the fix.
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*/
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public static void safeShaderSource(int glId, CharSequence source) {
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try (MemoryStack stack = MemoryStack.stackPush()) {
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final ByteBuffer sourceBuffer = stack.UTF8(source, true);
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final PointerBuffer pointers = stack.mallocPointer(1);
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pointers.put(sourceBuffer);
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GL20C.nglShaderSource(glId, 1, pointers.address0(), 0);
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}
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}
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private static boolean _decideIfWeAreAMDWindows() {
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if (Util.getPlatform() != Util.OS.WINDOWS) {
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return false;
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}
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String vendor = GL20C.glGetString(GL20C.GL_VENDOR);
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if (vendor == null) {
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return false;
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}
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// vendor string I got was "ATI Technologies Inc."
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return vendor.contains("ATI") || vendor.contains("AMD");
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}
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}
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