mythvisualcirclesvulkan.cpp

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// MythTV
#include "libmythui/vulkan/mythwindowvulkan.h"
#include "mythvisualcirclesvulkan.h"
 
#define CircleVertex450    (VK_SHADER_STAGE_VERTEX_BIT   | (1 << 6))
#define CircleFragment450  (VK_SHADER_STAGE_FRAGMENT_BIT | (1 << 7))
 
static const MythBindingMap k450CircleBindings = {
    { CircleVertex450,
        { VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP,
        { { 0, { .binding=0,
                 .descriptorType=VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
                 .descriptorCount=1,
                 .stageFlags=VK_SHADER_STAGE_VERTEX_BIT,
                 .pImmutableSamplers=nullptr } } },
        { },
        { },
        { .stageFlags=VK_SHADER_STAGE_VERTEX_BIT,
          .offset=0,
          .size=sizeof(CirclesBuffer) } }
    },
    { CircleFragment450,
        { VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP,
        { },
        { },
        { },
        { } }
    }
};
 
static const MythShaderMap k450CircleShaders = {
{
CircleVertex450,
{
"#version 450\n"
"#extension GL_ARB_separate_shader_objects : enable\n"
"layout(set = 0, binding = 0) uniform Projection { mat4 projection; } proj;\n"
"layout(push_constant) uniform ComboBuffer {\n"
"    mat4 transform;\n"
"    vec4 positions;\n"
"    vec4 params;\n"
"    vec4 color;\n"
"} cb;\n"
"layout(location = 0) out vec4 circleColor;\n"
"layout(location = 1) out vec4 circleParams;\n"
"void main() {\n"
"    vec2 vertices[4] = { vec2(cb.positions[0], cb.positions[1]),\n"
"                         vec2(cb.positions[0], cb.positions[3]),\n"
"                         vec2(cb.positions[2], cb.positions[1]),\n"
"                         vec2(cb.positions[2], cb.positions[3]) };\n"
"    gl_Position = proj.projection * cb.transform * vec4(vertices[gl_VertexIndex], 0.0, 1.0);\n"
"    circleColor = cb.color;\n"
"    circleParams = cb.params;\n"
"    circleParams.x = (cb.positions[0] + cb.positions[2]) / 2.0;\n"
"    circleParams.y = (cb.positions[1] + cb.positions[3]) / 2.0;\n"
"}\n",
{
0x07230203, 0x00010300, 0x00080008, 0x00000064, 0x00000000, 0x00020011,
0x00000001, 0x0006000B, 0x00000001, 0x4C534C47, 0x6474732E, 0x3035342E,
0x00000000, 0x0003000E, 0x00000000, 0x00000001, 0x0009000F, 0x00000000,
0x00000004, 0x6E69616D, 0x00000000, 0x00000031, 0x0000003E, 0x0000004B,
0x00000050, 0x00030003, 0x00000002, 0x000001C2, 0x00090004, 0x415F4C47,
0x735F4252, 0x72617065, 0x5F657461, 0x64616873, 0x6F5F7265, 0x63656A62,
0x00007374, 0x00040005, 0x00000004, 0x6E69616D, 0x00000000, 0x00050005,
0x0000000C, 0x74726576, 0x73656369, 0x00000000, 0x00050005, 0x0000000F,
0x626D6F43, 0x6675426F, 0x00726566, 0x00060006, 0x0000000F, 0x00000000,
0x6E617274, 0x726F6673, 0x0000006D, 0x00060006, 0x0000000F, 0x00000001,
0x69736F70, 0x6E6F6974, 0x00000073, 0x00050006, 0x0000000F, 0x00000002,
0x61726170, 0x0000736D, 0x00050006, 0x0000000F, 0x00000003, 0x6F6C6F63,
0x00000072, 0x00030005, 0x00000011, 0x00006263, 0x00060005, 0x0000002F,
0x505F6C67, 0x65567265, 0x78657472, 0x00000000, 0x00060006, 0x0000002F,
0x00000000, 0x505F6C67, 0x7469736F, 0x006E6F69, 0x00070006, 0x0000002F,
0x00000001, 0x505F6C67, 0x746E696F, 0x657A6953, 0x00000000, 0x00070006,
0x0000002F, 0x00000002, 0x435F6C67, 0x4470696C, 0x61747369, 0x0065636E,
0x00070006, 0x0000002F, 0x00000003, 0x435F6C67, 0x446C6C75, 0x61747369,
0x0065636E, 0x00030005, 0x00000031, 0x00000000, 0x00050005, 0x00000033,
0x6A6F7250, 0x69746365, 0x00006E6F, 0x00060006, 0x00000033, 0x00000000,
0x6A6F7270, 0x69746365, 0x00006E6F, 0x00040005, 0x00000035, 0x6A6F7270,
0x00000000, 0x00060005, 0x0000003E, 0x565F6C67, 0x65747265, 0x646E4978,
0x00007865, 0x00050005, 0x0000004B, 0x63726963, 0x6F43656C, 0x00726F6C,
0x00060005, 0x00000050, 0x63726963, 0x6150656C, 0x736D6172, 0x00000000,
0x00040048, 0x0000000F, 0x00000000, 0x00000005, 0x00050048, 0x0000000F,
0x00000000, 0x00000023, 0x00000000, 0x00050048, 0x0000000F, 0x00000000,
0x00000007, 0x00000010, 0x00050048, 0x0000000F, 0x00000001, 0x00000023,
0x00000040, 0x00050048, 0x0000000F, 0x00000002, 0x00000023, 0x00000050,
0x00050048, 0x0000000F, 0x00000003, 0x00000023, 0x00000060, 0x00030047,
0x0000000F, 0x00000002, 0x00050048, 0x0000002F, 0x00000000, 0x0000000B,
0x00000000, 0x00050048, 0x0000002F, 0x00000001, 0x0000000B, 0x00000001,
0x00050048, 0x0000002F, 0x00000002, 0x0000000B, 0x00000003, 0x00050048,
0x0000002F, 0x00000003, 0x0000000B, 0x00000004, 0x00030047, 0x0000002F,
0x00000002, 0x00040048, 0x00000033, 0x00000000, 0x00000005, 0x00050048,
0x00000033, 0x00000000, 0x00000023, 0x00000000, 0x00050048, 0x00000033,
0x00000000, 0x00000007, 0x00000010, 0x00030047, 0x00000033, 0x00000002,
0x00040047, 0x00000035, 0x00000022, 0x00000000, 0x00040047, 0x00000035,
0x00000021, 0x00000000, 0x00040047, 0x0000003E, 0x0000000B, 0x0000002A,
0x00040047, 0x0000004B, 0x0000001E, 0x00000000, 0x00040047, 0x00000050,
0x0000001E, 0x00000001, 0x00020013, 0x00000002, 0x00030021, 0x00000003,
0x00000002, 0x00030016, 0x00000006, 0x00000020, 0x00040017, 0x00000007,
0x00000006, 0x00000002, 0x00040015, 0x00000008, 0x00000020, 0x00000000,
0x0004002B, 0x00000008, 0x00000009, 0x00000004, 0x0004001C, 0x0000000A,
0x00000007, 0x00000009, 0x00040020, 0x0000000B, 0x00000007, 0x0000000A,
0x00040017, 0x0000000D, 0x00000006, 0x00000004, 0x00040018, 0x0000000E,
0x0000000D, 0x00000004, 0x0006001E, 0x0000000F, 0x0000000E, 0x0000000D,
0x0000000D, 0x0000000D, 0x00040020, 0x00000010, 0x00000009, 0x0000000F,
0x0004003B, 0x00000010, 0x00000011, 0x00000009, 0x00040015, 0x00000012,
0x00000020, 0x00000001, 0x0004002B, 0x00000012, 0x00000013, 0x00000001,
0x0004002B, 0x00000008, 0x00000014, 0x00000000, 0x00040020, 0x00000015,
0x00000009, 0x00000006, 0x0004002B, 0x00000008, 0x00000018, 0x00000001,
0x0004002B, 0x00000008, 0x0000001E, 0x00000003, 0x0004002B, 0x00000008,
0x00000022, 0x00000002, 0x0004001C, 0x0000002E, 0x00000006, 0x00000018,
0x0006001E, 0x0000002F, 0x0000000D, 0x00000006, 0x0000002E, 0x0000002E,
0x00040020, 0x00000030, 0x00000003, 0x0000002F, 0x0004003B, 0x00000030,
0x00000031, 0x00000003, 0x0004002B, 0x00000012, 0x00000032, 0x00000000,
0x0003001E, 0x00000033, 0x0000000E, 0x00040020, 0x00000034, 0x00000002,
0x00000033, 0x0004003B, 0x00000034, 0x00000035, 0x00000002, 0x00040020,
0x00000036, 0x00000002, 0x0000000E, 0x00040020, 0x00000039, 0x00000009,
0x0000000E, 0x00040020, 0x0000003D, 0x00000001, 0x00000012, 0x0004003B,
0x0000003D, 0x0000003E, 0x00000001, 0x00040020, 0x00000040, 0x00000007,
0x00000007, 0x0004002B, 0x00000006, 0x00000043, 0x00000000, 0x0004002B,
0x00000006, 0x00000044, 0x3F800000, 0x00040020, 0x00000049, 0x00000003,
0x0000000D, 0x0004003B, 0x00000049, 0x0000004B, 0x00000003, 0x0004002B,
0x00000012, 0x0000004C, 0x00000003, 0x00040020, 0x0000004D, 0x00000009,
0x0000000D, 0x0004003B, 0x00000049, 0x00000050, 0x00000003, 0x0004002B,
0x00000012, 0x00000051, 0x00000002, 0x0004002B, 0x00000006, 0x00000059,
0x40000000, 0x00040020, 0x0000005B, 0x00000003, 0x00000006, 0x00050036,
0x00000002, 0x00000004, 0x00000000, 0x00000003, 0x000200F8, 0x00000005,
0x0004003B, 0x0000000B, 0x0000000C, 0x00000007, 0x00060041, 0x00000015,
0x00000016, 0x00000011, 0x00000013, 0x00000014, 0x0004003D, 0x00000006,
0x00000017, 0x00000016, 0x00060041, 0x00000015, 0x00000019, 0x00000011,
0x00000013, 0x00000018, 0x0004003D, 0x00000006, 0x0000001A, 0x00000019,
0x00050050, 0x00000007, 0x0000001B, 0x00000017, 0x0000001A, 0x00060041,
0x00000015, 0x0000001C, 0x00000011, 0x00000013, 0x00000014, 0x0004003D,
0x00000006, 0x0000001D, 0x0000001C, 0x00060041, 0x00000015, 0x0000001F,
0x00000011, 0x00000013, 0x0000001E, 0x0004003D, 0x00000006, 0x00000020,
0x0000001F, 0x00050050, 0x00000007, 0x00000021, 0x0000001D, 0x00000020,
0x00060041, 0x00000015, 0x00000023, 0x00000011, 0x00000013, 0x00000022,
0x0004003D, 0x00000006, 0x00000024, 0x00000023, 0x00060041, 0x00000015,
0x00000025, 0x00000011, 0x00000013, 0x00000018, 0x0004003D, 0x00000006,
0x00000026, 0x00000025, 0x00050050, 0x00000007, 0x00000027, 0x00000024,
0x00000026, 0x00060041, 0x00000015, 0x00000028, 0x00000011, 0x00000013,
0x00000022, 0x0004003D, 0x00000006, 0x00000029, 0x00000028, 0x00060041,
0x00000015, 0x0000002A, 0x00000011, 0x00000013, 0x0000001E, 0x0004003D,
0x00000006, 0x0000002B, 0x0000002A, 0x00050050, 0x00000007, 0x0000002C,
0x00000029, 0x0000002B, 0x00070050, 0x0000000A, 0x0000002D, 0x0000001B,
0x00000021, 0x00000027, 0x0000002C, 0x0003003E, 0x0000000C, 0x0000002D,
0x00050041, 0x00000036, 0x00000037, 0x00000035, 0x00000032, 0x0004003D,
0x0000000E, 0x00000038, 0x00000037, 0x00050041, 0x00000039, 0x0000003A,
0x00000011, 0x00000032, 0x0004003D, 0x0000000E, 0x0000003B, 0x0000003A,
0x00050092, 0x0000000E, 0x0000003C, 0x00000038, 0x0000003B, 0x0004003D,
0x00000012, 0x0000003F, 0x0000003E, 0x00050041, 0x00000040, 0x00000041,
0x0000000C, 0x0000003F, 0x0004003D, 0x00000007, 0x00000042, 0x00000041,
0x00050051, 0x00000006, 0x00000045, 0x00000042, 0x00000000, 0x00050051,
0x00000006, 0x00000046, 0x00000042, 0x00000001, 0x00070050, 0x0000000D,
0x00000047, 0x00000045, 0x00000046, 0x00000043, 0x00000044, 0x00050091,
0x0000000D, 0x00000048, 0x0000003C, 0x00000047, 0x00050041, 0x00000049,
0x0000004A, 0x00000031, 0x00000032, 0x0003003E, 0x0000004A, 0x00000048,
0x00050041, 0x0000004D, 0x0000004E, 0x00000011, 0x0000004C, 0x0004003D,
0x0000000D, 0x0000004F, 0x0000004E, 0x0003003E, 0x0000004B, 0x0000004F,
0x00050041, 0x0000004D, 0x00000052, 0x00000011, 0x00000051, 0x0004003D,
0x0000000D, 0x00000053, 0x00000052, 0x0003003E, 0x00000050, 0x00000053,
0x00060041, 0x00000015, 0x00000054, 0x00000011, 0x00000013, 0x00000014,
0x0004003D, 0x00000006, 0x00000055, 0x00000054, 0x00060041, 0x00000015,
0x00000056, 0x00000011, 0x00000013, 0x00000022, 0x0004003D, 0x00000006,
0x00000057, 0x00000056, 0x00050081, 0x00000006, 0x00000058, 0x00000055,
0x00000057, 0x00050088, 0x00000006, 0x0000005A, 0x00000058, 0x00000059,
0x00050041, 0x0000005B, 0x0000005C, 0x00000050, 0x00000014, 0x0003003E,
0x0000005C, 0x0000005A, 0x00060041, 0x00000015, 0x0000005D, 0x00000011,
0x00000013, 0x00000018, 0x0004003D, 0x00000006, 0x0000005E, 0x0000005D,
0x00060041, 0x00000015, 0x0000005F, 0x00000011, 0x00000013, 0x0000001E,
0x0004003D, 0x00000006, 0x00000060, 0x0000005F, 0x00050081, 0x00000006,
0x00000061, 0x0000005E, 0x00000060, 0x00050088, 0x00000006, 0x00000062,
0x00000061, 0x00000059, 0x00050041, 0x0000005B, 0x00000063, 0x00000050,
0x00000018, 0x0003003E, 0x00000063, 0x00000062, 0x000100FD, 0x00010038
} } },
{
CircleFragment450,
{
"#version 450\n"
"#extension GL_ARB_separate_shader_objects : enable\n"
"layout(location = 0) in  vec4 circleColor;\n"
"layout(location = 1) in  vec4 circleParams;\n"
"layout(location = 0) out vec4 fragColor;\n"
"void main() {\n"
"    float dis   = distance(circleParams.xy, gl_FragCoord.xy);\n"
"    float mult1 = smoothstep(circleParams.z + 0.5, circleParams.z - 0.5, dis);\n"
"    float mult2 = smoothstep((circleParams.z - circleParams.w) - 0.5, (circleParams.z - circleParams.w) + 0.5, dis);\n"
"    fragColor   = circleColor * vec4(1.0, 1.0, 1.0, mult1 * mult2);\n"
"}\n",
{
0x07230203, 0x00010300, 0x00080008, 0x0000003A, 0x00000000, 0x00020011,
0x00000001, 0x0006000B, 0x00000001, 0x4C534C47, 0x6474732E, 0x3035342E,
0x00000000, 0x0003000E, 0x00000000, 0x00000001, 0x0009000F, 0x00000004,
0x00000004, 0x6E69616D, 0x00000000, 0x0000000B, 0x0000000F, 0x00000031,
0x00000032, 0x00030010, 0x00000004, 0x00000007, 0x00030003, 0x00000002,
0x000001C2, 0x00090004, 0x415F4C47, 0x735F4252, 0x72617065, 0x5F657461,
0x64616873, 0x6F5F7265, 0x63656A62, 0x00007374, 0x00040005, 0x00000004,
0x6E69616D, 0x00000000, 0x00030005, 0x00000008, 0x00736964, 0x00060005,
0x0000000B, 0x63726963, 0x6150656C, 0x736D6172, 0x00000000, 0x00060005,
0x0000000F, 0x465F6C67, 0x43676172, 0x64726F6F, 0x00000000, 0x00040005,
0x00000013, 0x746C756D, 0x00000031, 0x00040005, 0x00000020, 0x746C756D,
0x00000032, 0x00050005, 0x00000031, 0x67617266, 0x6F6C6F43, 0x00000072,
0x00050005, 0x00000032, 0x63726963, 0x6F43656C, 0x00726F6C, 0x00040047,
0x0000000B, 0x0000001E, 0x00000001, 0x00040047, 0x0000000F, 0x0000000B,
0x0000000F, 0x00040047, 0x00000031, 0x0000001E, 0x00000000, 0x00040047,
0x00000032, 0x0000001E, 0x00000000, 0x00020013, 0x00000002, 0x00030021,
0x00000003, 0x00000002, 0x00030016, 0x00000006, 0x00000020, 0x00040020,
0x00000007, 0x00000007, 0x00000006, 0x00040017, 0x00000009, 0x00000006,
0x00000004, 0x00040020, 0x0000000A, 0x00000001, 0x00000009, 0x0004003B,
0x0000000A, 0x0000000B, 0x00000001, 0x00040017, 0x0000000C, 0x00000006,
0x00000002, 0x0004003B, 0x0000000A, 0x0000000F, 0x00000001, 0x00040015,
0x00000014, 0x00000020, 0x00000000, 0x0004002B, 0x00000014, 0x00000015,
0x00000002, 0x00040020, 0x00000016, 0x00000001, 0x00000006, 0x0004002B,
0x00000006, 0x00000019, 0x3F000000, 0x0004002B, 0x00000014, 0x00000023,
0x00000003, 0x00040020, 0x00000030, 0x00000003, 0x00000009, 0x0004003B,
0x00000030, 0x00000031, 0x00000003, 0x0004003B, 0x0000000A, 0x00000032,
0x00000001, 0x0004002B, 0x00000006, 0x00000034, 0x3F800000, 0x00050036,
0x00000002, 0x00000004, 0x00000000, 0x00000003, 0x000200F8, 0x00000005,
0x0004003B, 0x00000007, 0x00000008, 0x00000007, 0x0004003B, 0x00000007,
0x00000013, 0x00000007, 0x0004003B, 0x00000007, 0x00000020, 0x00000007,
0x0004003D, 0x00000009, 0x0000000D, 0x0000000B, 0x0007004F, 0x0000000C,
0x0000000E, 0x0000000D, 0x0000000D, 0x00000000, 0x00000001, 0x0004003D,
0x00000009, 0x00000010, 0x0000000F, 0x0007004F, 0x0000000C, 0x00000011,
0x00000010, 0x00000010, 0x00000000, 0x00000001, 0x0007000C, 0x00000006,
0x00000012, 0x00000001, 0x00000043, 0x0000000E, 0x00000011, 0x0003003E,
0x00000008, 0x00000012, 0x00050041, 0x00000016, 0x00000017, 0x0000000B,
0x00000015, 0x0004003D, 0x00000006, 0x00000018, 0x00000017, 0x00050081,
0x00000006, 0x0000001A, 0x00000018, 0x00000019, 0x00050041, 0x00000016,
0x0000001B, 0x0000000B, 0x00000015, 0x0004003D, 0x00000006, 0x0000001C,
0x0000001B, 0x00050083, 0x00000006, 0x0000001D, 0x0000001C, 0x00000019,
0x0004003D, 0x00000006, 0x0000001E, 0x00000008, 0x0008000C, 0x00000006,
0x0000001F, 0x00000001, 0x00000031, 0x0000001A, 0x0000001D, 0x0000001E,
0x0003003E, 0x00000013, 0x0000001F, 0x00050041, 0x00000016, 0x00000021,
0x0000000B, 0x00000015, 0x0004003D, 0x00000006, 0x00000022, 0x00000021,
0x00050041, 0x00000016, 0x00000024, 0x0000000B, 0x00000023, 0x0004003D,
0x00000006, 0x00000025, 0x00000024, 0x00050083, 0x00000006, 0x00000026,
0x00000022, 0x00000025, 0x00050083, 0x00000006, 0x00000027, 0x00000026,
0x00000019, 0x00050041, 0x00000016, 0x00000028, 0x0000000B, 0x00000015,
0x0004003D, 0x00000006, 0x00000029, 0x00000028, 0x00050041, 0x00000016,
0x0000002A, 0x0000000B, 0x00000023, 0x0004003D, 0x00000006, 0x0000002B,
0x0000002A, 0x00050083, 0x00000006, 0x0000002C, 0x00000029, 0x0000002B,
0x00050081, 0x00000006, 0x0000002D, 0x0000002C, 0x00000019, 0x0004003D,
0x00000006, 0x0000002E, 0x00000008, 0x0008000C, 0x00000006, 0x0000002F,
0x00000001, 0x00000031, 0x00000027, 0x0000002D, 0x0000002E, 0x0003003E,
0x00000020, 0x0000002F, 0x0004003D, 0x00000009, 0x00000033, 0x00000032,
0x0004003D, 0x00000006, 0x00000035, 0x00000013, 0x0004003D, 0x00000006,
0x00000036, 0x00000020, 0x00050085, 0x00000006, 0x00000037, 0x00000035,
0x00000036, 0x00070050, 0x00000009, 0x00000038, 0x00000034, 0x00000034,
0x00000034, 0x00000037, 0x00050085, 0x00000009, 0x00000039, 0x00000033,
0x00000038, 0x0003003E, 0x00000031, 0x00000039, 0x000100FD, 0x00010038
} } }
};
 
MythVisualCirclesVulkan::MythVisualCirclesVulkan(AudioPlayer* Audio, MythRenderVulkan* Render)
  : VideoVisualCircles(Audio, Render),
    MythVisualVulkan(Render,
                     { }, { CircleVertex450, CircleFragment450 },
                     &k450CircleShaders, &k450CircleBindings)
{
}
 
MythVisualCirclesVulkan::~MythVisualCirclesVulkan()
{
    MythVisualCirclesVulkan::TearDownVulkan();
}
 
void MythVisualCirclesVulkan::DrawPriv(MythPainter* /*Painter*/, QPaintDevice* /*Device*/)
{
    if (!InitialiseVulkan(m_area))
        return;
 
    // Retrieve current command buffer
    auto *currentcmdbuf = m_vulkanWindow->currentCommandBuffer();
 
    // Bind our pipeline and retrieve layout
    m_vulkanFuncs->vkCmdBindPipeline(currentcmdbuf, VK_PIPELINE_BIND_POINT_GRAPHICS, m_pipeline);
    VkPipelineLayout layout = m_vulkanShader->GetPipelineLayout();
 
    // Bind projection descriptor set
    m_vulkanFuncs->vkCmdBindDescriptorSets(currentcmdbuf, VK_PIPELINE_BIND_POINT_GRAPHICS,
                                           layout, 0, 1, &m_projectionDescriptor, 0, nullptr);
 
    auto range = static_cast<float>(m_range);
    float red = 0.0F;
    float green = 0.8F;
    int count = m_scale.range();
    float incr = 0.8F / count;
    float rad = range;
 
    for (int i = 0; i < count; i++)
    {
        float mag = static_cast<float>(qAbs((m_magnitudes[i] + m_magnitudes[i + count]) / 2.0));
        if (mag > 1.0F)
        {
            // Setup circle and push constants
            m_pushBuffer.color[0] = red;
            m_pushBuffer.color[1] = green;
            m_pushBuffer.params[2] = rad;
            m_pushBuffer.params[3] = mag;
            m_vulkanFuncs->vkCmdPushConstants(currentcmdbuf, layout, VK_SHADER_STAGE_VERTEX_BIT,
                                              0, sizeof(CirclesBuffer), &m_pushBuffer);
 
            // Draw
            m_vulkanFuncs->vkCmdDraw(currentcmdbuf, 4, 1, 0, 0);
        }
        rad += range;
        red += incr;
        green -= incr;
    }
}
 
MythRenderVulkan* MythVisualCirclesVulkan::InitialiseVulkan(const QRect Area)
{
    if (m_disabled)
        return nullptr;
 
    if (!IsValidVulkan())
        return nullptr;
 
    if ((Area == m_vulkanArea) && m_vulkanShader && m_pipeline &&
        m_projectionUniform && m_descriptorPool && m_projectionDescriptor)
    {
        return m_vulkanRender;
    }
 
    TearDownVulkan();
    m_vulkanArea = Area;
 
    // Common init
    if (!MythVisualVulkan::InitialiseVulkan(Area))
        return nullptr;
 
    QMatrix4x4 transform;
    memcpy(&m_pushBuffer.transform[0], transform.constData(), sizeof(float) * 16);
    m_pushBuffer.positions[0] = m_area.left();
    m_pushBuffer.positions[1] = m_area.top();
    m_pushBuffer.positions[2] = m_area.right();
    m_pushBuffer.positions[3] = m_area.bottom();
    m_pushBuffer.color[2] = 0.0;
    m_pushBuffer.color[3] = 0.8F;
 
    return m_vulkanRender;
}
 
void MythVisualCirclesVulkan::TearDownVulkan()
{
    m_vulkanArea = {};
    MythVisualVulkan::TearDownVulkan();
}