111 lines
3.5 KiB
Plaintext
111 lines
3.5 KiB
Plaintext
// =============================================================================
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// sprite_shader.slang - 使用全局变量的精灵着色器
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// =============================================================================
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#include "common_2d.slang"
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// 自动生成标准顶点着色器
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STANDARD_VERTEX_SHADER(vertexMain)
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// 简单的像素着色器
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STANDARD_PIXEL_SHADER(pixelMain, {
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// 这里可以添加自定义代码
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// color 变量已经包含了采样后的纹理颜色
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})
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// 带发光效果的像素着色器
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DECLARE_PIXEL_GLOBALS
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DECLARE_STANDARD_TEXTURES
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[shader("fragment")]
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float4 pixelMainGlow(VertexShaderOutput input) : SV_Target {
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float4 color = g_mainTexture.Sample(g_linearSampler, input.texCoord);
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color *= input.color;
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// 发光效果
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if (g_effect.glowSize > 0.0) {
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float2 texelSize = g_scene.invScreenSize;
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float4 glow = float4(0.0);
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// 简单的发光采样
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for (int y = -2; y <= 2; y++) {
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for (int x = -2; x <= 2; x++) {
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float2 offset = float2(x, y) * texelSize * g_effect.glowSize;
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float4 sample = g_mainTexture.Sample(g_linearSampler, input.texCoord + offset);
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float weight = 1.0 / (1.0 + length(float2(x, y)));
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glow += sample * weight;
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}
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}
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glow *= g_effect.glowColor;
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color.rgb += glow.rgb * g_effect.glowColor.a;
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}
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// 应用标准材质参数
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color.rgb = adjustBrightness(color.rgb, g_material.brightness);
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color.rgb = adjustContrast(color.rgb, g_material.contrast);
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color.rgb = adjustSaturation(color.rgb, g_material.saturation);
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color.a *= g_material.opacity;
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return color;
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}
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// 文字渲染着色器
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DECLARE_PIXEL_GLOBALS
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DECLARE_STANDARD_TEXTURES
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[shader("fragment")]
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float4 pixelMainText(VertexShaderOutput input) : SV_Target {
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// 文字通常存储在alpha通道
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float alpha = g_mainTexture.Sample(g_linearSampler, input.texCoord).a;
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// SDF文字渲染
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float distance = alpha;
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float smoothing = fwidth(distance) * 0.75;
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alpha = smootherstep(0.5 - smoothing, 0.5 + smoothing, distance);
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// 应用颜色
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float4 color = float4(input.color.rgb, input.color.a * alpha);
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// 文字阴影
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if (g_effect.shadowDistance > 0.0) {
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float2 shadowOffset = float2(
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cos(g_effect.shadowAngle),
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sin(g_effect.shadowAngle)
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) * g_effect.shadowDistance * g_scene.invScreenSize;
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float shadowAlpha = g_mainTexture.Sample(g_linearSampler, input.texCoord - shadowOffset).a;
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shadowAlpha = smootherstep(0.5 - smoothing * g_effect.shadowSoftness, 0.5 + smoothing * g_effect.shadowSoftness, shadowAlpha);
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// 混合阴影
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color.rgb = lerp(float3(0.0, 0.0, 0.0), color.rgb, alpha);
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color.a = max(color.a, shadowAlpha * 0.5);
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}
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return color;
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}
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// 形状渲染着色器（使用SDF）
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DECLARE_PIXEL_GLOBALS
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[shader("fragment")]
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float4 pixelMainShape(VertexShaderOutput input) : SV_Target {
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float2 p = input.texCoord * 2.0 - 1.0; // 转换到[-1, 1]空间
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// 圆角矩形SDF
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float d = sdRoundedBox(p, float2(0.8, 0.6), 0.1);
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// 抗锯齿边缘
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float alpha = 1.0 - smoothstep(-0.01, 0.01, d);
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// 渐变填充
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float gradient = (p.y + 1.0) * 0.5;
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float3 color = lerp(
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g_effect.gradientColors[0].rgb,
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g_effect.gradientColors[1].rgb,
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gradient
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);
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return float4(color * input.color.rgb, alpha * input.color.a * g_material.opacity);
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}
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