mirror of
https://github.com/holub/mame
synced 2025-05-30 17:41:47 +03:00
0837e7451a
* Sync with bgfx upstream revision b91d0b6 * Sync with bx upstream revision d60912b * Sync with bimg upstream revision bd81f60 * Add astc-codec decoder * Rename VertexDecl to VertexLayout * Rename UniformType enum Int1 to Sampler. * Add NVN stub * Fix unused-const-variable error on macOS * Drop redundant explicit language parameters buildoptions_cpp are only applied to c++ files and buildoptions_objcpp are only applied to objective c++ files. As such, hardcoding -x offers no benefit while preventing overrides (such as one needed by 3rdparty/bgfx/src/renderer_vk.cpp on macOS) from working. * Re-introduce -x c++ in places where C code is compiled as C++ to prevent clang from throwing a warning * Build bgfx as Objective-C++ on macOS It is needed due to included headers * Enable Direct3D12 and Vulkan bgfx rendering backends * Enable building of spirv shaders * Properly escape /c in cmd call * Comment out dx12 bgfx renderer * Honor VERBOSE setting during shaders build * Only invert hlsl shader XYZ_TO_sRGB matrix for opengl * Add spirv shaders * OpenGL ES needs transposed matrix too * Metal needs transposed matrix as well
128 lines
2.2 KiB
Bash
128 lines
2.2 KiB
Bash
uint findMSB(uint x)
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{
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uint i;
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uint mask;
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uint res = -1;
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for (i = 0; i < 32; i++)
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{
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mask = 0x80000000 >> i;
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if ((x & mask) != 0)
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{
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res = 31 - i;
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break;
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}
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}
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return res;
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}
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uint parentKey(in uint key)
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{
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return (key >> 1u);
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}
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void childrenKeys(in uint key, out uint children[2])
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{
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children[0] = (key << 1u) | 0u;
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children[1] = (key << 1u) | 1u;
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}
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bool isRootKey(in uint key)
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{
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return (key == 1u);
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}
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bool isLeafKey(in uint key)
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{
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return findMSB(key) == 31;
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}
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bool isChildZeroKey(in uint key)
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{
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return ((key & 1u) == 0u);
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}
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// barycentric interpolation
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vec3 berp(in vec3 v[3], in vec2 u)
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{
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return v[0] + u.x * (v[1] - v[0]) + u.y * (v[2] - v[0]);
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}
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vec4 berp(in vec4 v[3], in vec2 u)
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{
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return v[0] + u.x * (v[1] - v[0]) + u.y * (v[2] - v[0]);
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}
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// get xform from bit value
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mat3 bitToXform(in uint bit)
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{
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float b = float(bit);
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float c = 1.0f - b;
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vec3 c1 = vec3(0.0f, c , b );
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vec3 c2 = vec3(0.5f, b , 0.0f);
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vec3 c3 = vec3(0.5f, 0.0f, c );
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return mtxFromCols(c1, c2, c3);
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}
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// get xform from key
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mat3 keyToXform(in uint key)
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{
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vec3 c1 = vec3(1.0f, 0.0f, 0.0f);
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vec3 c2 = vec3(0.0f, 1.0f, 0.0f);
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vec3 c3 = vec3(0.0f, 0.0f, 1.0f);
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mat3 xf = mtxFromCols(c1, c2, c3);
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while (key > 1u) {
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xf = mul(xf, bitToXform(key & 1u));
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key = key >> 1u;
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}
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return xf;
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}
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// get xform from key as well as xform from parent key
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mat3 keyToXform(in uint key, out mat3 xfp)
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{
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xfp = keyToXform(parentKey(key));
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return keyToXform(key);
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}
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// subdivision routine (vertex position only)
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void subd(in uint key, in vec4 v_in[3], out vec4 v_out[3])
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{
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mat3 xf = keyToXform(key);
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mat4x3 m = mtxFromRows(v_in[0], v_in[1], v_in[2]);
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mat4x3 v = mul(xf, m);
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v_out[0] = mtxGetRow(v, 0);
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v_out[1] = mtxGetRow(v, 1);
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v_out[2] = mtxGetRow(v, 2);
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}
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// subdivision routine (vertex position only)
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// also computes parent position
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void subd(in uint key, in vec4 v_in[3], out vec4 v_out[3], out vec4 v_out_p[3])
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{
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mat3 xfp; mat3 xf = keyToXform(key, xfp);
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mat4x3 m = mtxFromRows(v_in[0], v_in[1], v_in[2]);
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mat4x3 v = mul(xf, m);
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mat4x3 vp = mul(xfp, m);
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v_out[0] = mtxGetRow(v, 0);
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v_out[1] = mtxGetRow(v, 1);
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v_out[2] = mtxGetRow(v, 2);
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v_out_p[0] = mtxGetRow(vp, 0);
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v_out_p[1] = mtxGetRow(vp, 1);
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v_out_p[2] = mtxGetRow(vp, 2);
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}
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