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Merge pull request #30870 from raphael10241024/fix_shadow

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update algorithm about paking float to vec4 to fix shadow slipping
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Rémi Verschelde 2019-07-29 10:11:15 +02:00 committed by GitHub
commit 47df673d73
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 10 additions and 11 deletions
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3
drivers/gles2/shaders/canvas.glsl
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@ -489,8 +489,7 @@ FRAGMENT_SHADER_CODE
highp float shadow_attenuation = 0.0;
#ifdef USE_RGBA_SHADOWS
#define SHADOW_DEPTH(m_tex, m_uv) dot(texture2D((m_tex), (m_uv)), vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0))
#define SHADOW_DEPTH(m_tex, m_uv) dot(texture2D((m_tex), (m_uv)), vec4(1.0 / (255.0 * 255.0 * 255.0), 1.0 / (255.0 * 255.0), 1.0 / 255.0, 1.0))
#else

4
drivers/gles2/shaders/canvas_shadow.glsl
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@ -47,8 +47,8 @@ void main() {
#ifdef USE_RGBA_SHADOWS
highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
comp -= comp.xxyz * vec4(0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
highp vec4 comp = fract(depth * vec4(255.0 * 255.0 * 255.0, 255.0 * 255.0, 255.0, 1.0));
comp -= comp.xxyz * vec4(0.0, 1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0);
gl_FragColor = comp;
#else

6
drivers/gles2/shaders/scene.glsl
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@ -1365,7 +1365,7 @@ LIGHT_SHADER_CODE
#ifdef USE_RGBA_SHADOWS
#define SHADOW_DEPTH(m_val) dot(m_val, vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0))
#define SHADOW_DEPTH(m_val) dot(m_val, vec4(1.0 / (255.0 * 255.0 * 255.0), 1.0 / (255.0 * 255.0), 1.0 / 255.0, 1.0))
#else
@ -2207,8 +2207,8 @@ FRAGMENT_SHADER_CODE
#ifdef USE_RGBA_SHADOWS
highp float depth = ((position_interp.z / position_interp.w) + 1.0) * 0.5 + 0.0; // bias
highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
comp -= comp.xxyz * vec4(0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
highp vec4 comp = fract(depth * vec4(255.0 * 255.0 * 255.0, 255.0 * 255.0, 255.0, 1.0));
comp -= comp.xxyz * vec4(0.0, 1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0);
gl_FragColor = comp;
#endif

2
drivers/gles3/rasterizer_storage_gles3.cpp
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@ -8093,7 +8093,7 @@ void RasterizerStorageGLES3::initialize() {
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &config.max_texture_image_units);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &config.max_texture_size);
config.use_rgba_2d_shadows = config.framebuffer_float_supported;
config.use_rgba_2d_shadows = !config.framebuffer_float_supported;
//generic quadie for copying

2
drivers/gles3/shaders/canvas.glsl
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@ -597,7 +597,7 @@ FRAGMENT_SHADER_CODE
#ifdef USE_RGBA_SHADOWS
#define SHADOW_DEPTH(m_tex, m_uv) dot(texture((m_tex), (m_uv)), vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0))
#define SHADOW_DEPTH(m_tex, m_uv) dot(texture((m_tex), (m_uv)), vec4(1.0 / (255.0 * 255.0 * 255.0), 1.0 / (255.0 * 255.0), 1.0 / 255.0, 1.0))
#else

4
drivers/gles3/shaders/canvas_shadow.glsl
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@ -35,8 +35,8 @@ void main() {
#ifdef USE_RGBA_SHADOWS
highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
comp -= comp.xxyz * vec4(0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
highp vec4 comp = fract(depth * vec4(255.0 * 255.0 * 255.0, 255.0 * 255.0, 255.0, 1.0));
comp -= comp.xxyz * vec4(0.0, 1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0);
distance_buf = comp;
#else