add new win32 platform implementation (#1224)

* Buffer resources from swap chain were not being released.
* sysgpu Texture.getWidth() should return width not height.
* d3d12: Fixing issues with d3d12 on sysgpu.
* Initial win32 platform

src/gfx/Sprite.zig

@@ -5,6 +5,9 @@ const gfx = mach.gfx;
 
 const math = mach.math;
 const vec2 = math.vec2;
+const vec3 = math.vec3;
+const vec4 = math.vec4;
+const mat4x4 = math.mat4x4;
 const Vec2 = math.Vec2;
 const Vec3 = math.Vec3;
 const Mat3x3 = math.Mat3x3;
@@ -87,8 +90,14 @@ fn updatePipeline(
             // that all entities with the same pipeline value are stored in contiguous memory, and
             // skip this copy.
             if (sprite_pipeline_id == pipeline_id) {
+                const uv = uv_transform;
                 gfx.SpritePipeline.cp_transforms[i] = transform;
-                gfx.SpritePipeline.cp_uv_transforms[i] = uv_transform;
+                // TODO(d3d12): #1217
+                //   changed the uv_transform to 4x4. The 3x3 causes issues with d3d12/hlsl
+                gfx.SpritePipeline.cp_uv_transforms[i].v[0] = vec4(uv.v[0].x(), uv.v[0].y(), uv.v[0].z(), 0.0);
+                gfx.SpritePipeline.cp_uv_transforms[i].v[1] = vec4(uv.v[1].x(), uv.v[1].y(), uv.v[1].z(), 0.0);
+                gfx.SpritePipeline.cp_uv_transforms[i].v[2] = vec4(uv.v[2].x(), uv.v[2].y(), uv.v[2].z(), 0.0);
+                gfx.SpritePipeline.cp_uv_transforms[i].v[3] = vec4(0.0, 0.0, 0.0, 0.0);
                 gfx.SpritePipeline.cp_sizes[i] = size;
                 i += 1;
                 num_sprites += 1;
@@ -98,8 +107,10 @@ fn updatePipeline(
 
     // Sort sprites back-to-front for draw order, alpha blending
     const Context = struct {
+        // TODO(d3d12): #1217
+        //   changed the uv_transform to 4x4. The 3x3 causes issues with d3d12/hlsl
         transforms: []Mat4x4,
-        uv_transforms: []Mat3x3,
+        uv_transforms: []Mat4x4, 
         sizes: []Vec2,
 
         pub fn lessThan(ctx: @This(), a: usize, b: usize) bool {
@@ -111,7 +122,9 @@ fn updatePipeline(
 
         pub fn swap(ctx: @This(), a: usize, b: usize) void {
             std.mem.swap(Mat4x4, &ctx.transforms[a], &ctx.transforms[b]);
-            std.mem.swap(Mat3x3, &ctx.uv_transforms[a], &ctx.uv_transforms[b]);
+            // TODO(d3d12): #1217
+            //   changed the uv_transform to 4x4. The 3x3 causes issues with d3d12/hlsl
+            std.mem.swap(Mat4x4, &ctx.uv_transforms[a], &ctx.uv_transforms[b]);
             std.mem.swap(Vec2, &ctx.sizes[a], &ctx.sizes[b]);
         }
     };

src/gfx/SpritePipeline.zig

@@ -110,7 +110,9 @@ const sprite_buffer_cap = 1024 * 512; // TODO(sprite): allow user to specify pre
 // TODO(sprite): eliminate these, see Sprite.updatePipeline for details on why these exist
 // currently.
 pub var cp_transforms: [sprite_buffer_cap]math.Mat4x4 = undefined;
-pub var cp_uv_transforms: [sprite_buffer_cap]math.Mat3x3 = undefined;
+// TODO(d3d12): #1217
+//   changed the uv_transform to 4x4. The 3x3 causes issues with d3d12/hlsl
+pub var cp_uv_transforms: [sprite_buffer_cap]math.Mat4x4 = undefined;
 pub var cp_sizes: [sprite_buffer_cap]math.Vec2 = undefined;
 
 /// Which render pass should be used during .render
@@ -209,7 +211,9 @@ fn buildPipeline(
     const uv_transforms = device.createBuffer(&.{
         .label = label ++ " uv_transforms",
         .usage = .{ .storage = true, .copy_dst = true },
-        .size = @sizeOf(math.Mat3x3) * sprite_buffer_cap,
+        // TODO(d3d12): #1217
+        //   changed the uv_transform to 4x4. The 3x3 causes issues with d3d12/hlsl
+        .size = @sizeOf(math.Mat4x4) * sprite_buffer_cap,
         .mapped_at_creation = .false,
     });
     const sizes = device.createBuffer(&.{

src/gfx/Text.zig

@@ -273,6 +273,9 @@ fn updatePipeline(
                         ).divScalar(px_density),
                         .size = size.divScalar(px_density),
                         .text_index = num_texts,
+                        // TODO(d3d12): #1217
+                        //   Added padding for d3d12/hlsl. Having 7 floats before the color vec caused and error.
+                        .text_padding = 0,
                         .uv_pos = vec2(@floatFromInt(r.x), @floatFromInt(r.y)),
                         .color = font_color,
                     });

src/gfx/TextPipeline.zig

@@ -134,6 +134,9 @@ pub const Glyph = extern struct {
 
     /// Which text this glyph belongs to; this is the index for transforms[i], colors[i].
     text_index: u32,
+    // TODO(d3d12): #1217
+    //   Added padding for d3d12/hlsl. Having 7 floats before the color vec caused and error.
+    text_padding: u32,
 
     /// Color of the glyph
     color: math.Vec4,

src/gfx/sprite.wgsl

@@ -25,7 +25,9 @@ struct Uniforms {
 
 // Sprite UV coordinate transformation matrices. Sprite UV coordinates are (0, 0) at the top-left
 // corner, and in pixels.
-@group(0) @binding(2) var<storage, read> sprite_uv_transforms: array<mat3x3<f32>>;
+// TODO(d3d12): #1217
+//   changed the uv_transform to 4x4. The 3x3 ca@group(0) @binding(2) var<storage, read> sprite_uv_transforms: array<mat4x4<f32>>;
+@group(0) @binding(2) var<storage, read> sprite_uv_transforms: array<mat4x4<f32>>;
 
 // Sprite sizes, in pixels.
 @group(0) @binding(3) var<storage, read> sprite_sizes: array<vec2<f32>>;
@@ -70,12 +72,12 @@ fn vertMain(
   // Currently, our pos_2d and uv coordinates describe a card that covers 1px by 1px; and the UV
   // coordinates describe using the entire texture. We alter the coordinates to describe the
   // desired sprite location, size, and apply a subset of the texture instead of the entire texture.
-  var pos = vec4<f32>(pos_2d * sprite_size, 0, 1); // normalized -> pixels
+  var pos = vec4<f32>(pos_2d * sprite_size, 0, 1); // normalized -> pixels 
   pos = sprite_transform * pos; // apply sprite transform (pixels)
   pos = uniforms.view_projection * pos; // pixels -> normalized
 
   uv *= sprite_size; // normalized -> pixels
-  uv = (sprite_uv_transform * vec3<f32>(uv, 1)).xy; // apply sprite UV transform (pixels)
+  uv = (sprite_uv_transform * vec4<f32>(uv, 1, 0)).xy; // apply sprite UV transform (pixels)
   uv /= uniforms.texture_size; // pixels -> normalized
 
   var output : VertexOutput;

src/gfx/text.wgsl

@@ -34,6 +34,10 @@ struct Glyph {
   // Which text this glyph belongs to; this is the index for transforms[i], colors[i]
   text_index: u32,
 
+  // TODO(d3d12): #1217
+  //   Added padding for d3d12/hlsl. Having 7 floats before the color vec caused and error.
+  text_index2: u32,   // Padding for struct alignment
+
   // Color of the glyph
   color: vec4<f32>,
 }