StillHammer
262eef377e
- Create proper sprite shader (vs_sprite.sc, fs_sprite.sc) with GPU instancing - SpriteInstance struct now 80 bytes (5 x vec4) for GPU layout compatibility - Add BufferDesc::Layout enum (Raw, PosColor, InstanceData) for proper vertex layouts - BgfxDevice creates correct VertexLayout based on buffer type - SpritePass uses PosColor layout for quad vertices (Position + Color0) - Instance buffer uses 5 x vec4 layout (TexCoord7-3) for i_data0-4 - Add texture support with v_texcoord0 interpolation from instance UVs - Create default white 1x1 texture fallback - Compile shaders for SPIRV (Vulkan), GLSL (OpenGL), and Metal Visual test confirms sprites render correctly at ~545 FPS. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
46 lines
1.4 KiB
Scala
46 lines
1.4 KiB
Scala
$input a_position, a_color0, i_data0, i_data1, i_data2, i_data3, i_data4
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$output v_color0, v_texcoord0
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#include <bgfx_shader.sh>
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// Instanced sprite shader with texture support
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// Instance data layout (5 x vec4 = 80 bytes):
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// i_data0: x, y, scaleX, scaleY
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// i_data1: rotation, u0, v0, u1
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// i_data2: v1, textureId, layer, padding
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// i_data3: reserved
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// i_data4: r, g, b, a (color)
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void main()
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{
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// Extract transform from instance data
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vec2 pos = i_data0.xy;
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vec2 scale = i_data0.zw;
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float rot = i_data1.x;
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// Extract UVs from instance data
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float u0 = i_data1.y;
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float v0 = i_data1.z;
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float u1 = i_data1.w;
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float v1 = i_data2.x;
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float c = cos(rot);
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float s = sin(rot);
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// Transform vertex (quad is 0-1, center at 0.5)
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vec2 localPos = a_position.xy - vec2(0.5, 0.5);
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vec2 rotatedPos;
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rotatedPos.x = localPos.x * c - localPos.y * s;
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rotatedPos.y = localPos.x * s + localPos.y * c;
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vec2 worldPos = rotatedPos * scale + pos;
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gl_Position = mul(u_viewProj, vec4(worldPos, 0.0, 1.0));
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// Interpolate UVs based on vertex position in quad (0-1)
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// a_position.xy is the vertex position (0,0), (1,0), (1,1), (0,1)
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v_texcoord0 = mix(vec2(u0, v0), vec2(u1, v1), a_position.xy);
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// Color = vertex color * instance color
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v_color0 = a_color0 * i_data4;
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}
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