Created Graphics Driver Issues (markdown)

Graphics-Driver-Issues.md

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+## Overview
+This page quickly summarizes graphics driver quirks and issues present in GPU drivers by different manufacturers.
+
+### Intel (proprietary)
+**OpenGL.**
+- GLSL compiler is broken. There are likely other issues as well. This driver is unsupported by RPCS3.
+
+**Vulkan.**
+- Raster pattern requires 'Strict Mode' to be enabled to deal with framebuffer feedback loops, otherwise a diagonal line may be observed on screen between triangle edges.
+
+### AMD (proprietary)
+**OpenGL.**
+- glMultiDrawArrays is broken. Workaround implemented and problem reported to AMD. No replies yet.
+- glGetTexImage/glGetTextureImage/glGetTextureImageEXT do not work with immutable textures if pack/unpack byteswap is requested. Workaround implemented.
+
+**Vulkan.**
+- Raster pattern requires 'Strict Mode' to be enabled to deal with framebuffer feedback loops, otherwise a diagonal line may be observed on screen between triangle edges.
+- Primitive restart is 'broken'. This seems to be a GCN hardware bug as it also affects mesa drivers to some extent. Workaround implemented.
+
+### NVIDIA (proprietary)
+**OpenGL.**
+- FP precision issues with Nan/Inf values. Workaround implemented.
+
+**Vulkan.**
+- FP precision issues with Nan/Inf values. Workaround implemented.
+- (Linux only) Problems with SPIRV, compiler does not properly read exponent style values (e.g 1.e-2 vs 0.01)
+
+### Mesa
+**OpenGL.**
+- No issues
+
+**Vulkan.**
+- RADV: Performance is low in some titles
+