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15-shadowmaps-simple: Fixed float depth packing mode

This commit is contained in:
Attila Kocsis 2019-08-16 11:20:17 +02:00 committed by Бранимир Караџић
parent 9009ba50ba
commit e0b99aa358
1 changed files with 109 additions and 59 deletions
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168
examples/15-shadowmaps-simple/shadowmaps_simple.cpp
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@ -106,6 +106,8 @@ public:
}
bgfx::setUniform(u_depthScaleOffset, depthScaleOffset);
bgfx::touch(0);
// Create vertex stream declaration.
PosNormalVertex::init();
@ -129,67 +131,14 @@ public:
// Shadow samplers are supported at least partially supported if texture
// compare less equal feature is supported.
m_shadowSamplerSupported = 0 != (caps->supported & BGFX_CAPS_TEXTURE_COMPARE_LEQUAL);
m_useShadowSampler = m_shadowSamplerSupported;
bgfx::TextureHandle shadowMapTexture;
if (m_shadowSamplerSupported)
{
// Depth textures and shadow samplers are supported.
m_progShadow = loadProgram("vs_sms_shadow", "fs_sms_shadow");
m_progMesh = loadProgram("vs_sms_mesh", "fs_sms_mesh");
bgfx::TextureHandle fbtextures[] =
{
bgfx::createTexture2D(
m_shadowMapSize
, m_shadowMapSize
, false
, 1
, bgfx::TextureFormat::D16
, BGFX_TEXTURE_RT | BGFX_SAMPLER_COMPARE_LEQUAL
),
};
shadowMapTexture = fbtextures[0];
m_shadowMapFB = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
}
else
{
// Depth textures and shadow samplers are not supported. Use float
// depth packing into color buffer instead.
m_progShadow = loadProgram("vs_sms_shadow_pd", "fs_sms_shadow_pd");
m_progMesh = loadProgram("vs_sms_mesh", "fs_sms_mesh_pd");
bgfx::TextureHandle fbtextures[] =
{
bgfx::createTexture2D(
m_shadowMapSize
, m_shadowMapSize
, false
, 1
, bgfx::TextureFormat::BGRA8
, BGFX_TEXTURE_RT
),
bgfx::createTexture2D(
m_shadowMapSize
, m_shadowMapSize
, false
, 1
, bgfx::TextureFormat::D16
, BGFX_TEXTURE_RT_WRITE_ONLY
),
};
shadowMapTexture = fbtextures[0];
m_shadowMapFB = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
}
m_shadowMapFB = BGFX_INVALID_HANDLE;
m_progShadow = BGFX_INVALID_HANDLE;
m_progMesh = BGFX_INVALID_HANDLE;
m_state[0] = meshStateCreate();
m_state[0]->m_state = 0
| (m_shadowSamplerSupported ? 0 : BGFX_STATE_WRITE_RGB|BGFX_STATE_WRITE_A)
| BGFX_STATE_WRITE_Z
| BGFX_STATE_DEPTH_TEST_LESS
| BGFX_STATE_CULL_CCW
| BGFX_STATE_MSAA
;
m_state[0]->m_state = 0;
m_state[0]->m_program = m_progShadow;
m_state[0]->m_viewId = RENDER_SHADOW_PASS_ID;
m_state[0]->m_numTextures = 0;
@ -209,7 +158,7 @@ public:
m_state[1]->m_textures[0].m_flags = UINT32_MAX;
m_state[1]->m_textures[0].m_stage = 0;
m_state[1]->m_textures[0].m_sampler = s_shadowMap;
m_state[1]->m_textures[0].m_texture = shadowMapTexture;
m_state[1]->m_textures[0].m_texture = BGFX_INVALID_HANDLE;
// Set view and projection matrices.
@ -271,12 +220,112 @@ public:
showExampleDialog(this);
ImGui::SetNextWindowPos(
ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f)
, ImGuiCond_FirstUseEver
);
ImGui::SetNextWindowSize(
ImVec2(m_width / 5.0f, m_height / 2.0f)
, ImGuiCond_FirstUseEver
);
ImGui::Begin("Settings"
, NULL
, 0
);
bool shadowSamplerModeChanged = false;
if (m_shadowSamplerSupported)
{
shadowSamplerModeChanged = ImGui::Checkbox("Use Shadow Sampler", &m_useShadowSampler);
}
else
{
ImGui::Text("Shadow sampler is not supported");
}
ImGui::End();
imguiEndFrame();
int64_t now = bx::getHPCounter();
const double freq = double(bx::getHPFrequency() );
float time = float( (now-m_timeOffset)/freq);
if (!bgfx::isValid(m_shadowMapFB) || shadowSamplerModeChanged)
{
bgfx::TextureHandle shadowMapTexture;
if (bgfx::isValid(m_progShadow))
bgfx::destroy(m_progShadow);
if (bgfx::isValid(m_progMesh))
bgfx::destroy(m_progMesh);
if (bgfx::isValid(m_shadowMapFB))
bgfx::destroy(m_shadowMapFB);
if (m_useShadowSampler)
{
// Depth textures and shadow samplers are supported.
m_progShadow = loadProgram("vs_sms_shadow", "fs_sms_shadow");
m_progMesh = loadProgram("vs_sms_mesh", "fs_sms_mesh");
bgfx::TextureHandle fbtextures[] =
{
bgfx::createTexture2D(
m_shadowMapSize
, m_shadowMapSize
, false
, 1
, bgfx::TextureFormat::D16
, BGFX_TEXTURE_RT | BGFX_SAMPLER_COMPARE_LEQUAL
),
};
shadowMapTexture = fbtextures[0];
m_shadowMapFB = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
}
else
{
// Depth textures and shadow samplers are not supported. Use float
// depth packing into color buffer instead.
m_progShadow = loadProgram("vs_sms_shadow_pd", "fs_sms_shadow_pd");
m_progMesh = loadProgram("vs_sms_mesh", "fs_sms_mesh_pd");
bgfx::TextureHandle fbtextures[] =
{
bgfx::createTexture2D(
m_shadowMapSize
, m_shadowMapSize
, false
, 1
, bgfx::TextureFormat::BGRA8
, BGFX_TEXTURE_RT
),
bgfx::createTexture2D(
m_shadowMapSize
, m_shadowMapSize
, false
, 1
, bgfx::TextureFormat::D16
, BGFX_TEXTURE_RT_WRITE_ONLY
),
};
shadowMapTexture = fbtextures[0];
m_shadowMapFB = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
}
m_state[0]->m_program = m_progShadow;
m_state[0]->m_state = 0
| (m_useShadowSampler ? 0 : BGFX_STATE_WRITE_RGB | BGFX_STATE_WRITE_A)
| BGFX_STATE_WRITE_Z
| BGFX_STATE_DEPTH_TEST_LESS
| BGFX_STATE_CULL_CCW
| BGFX_STATE_MSAA
;
m_state[1]->m_program = m_progMesh;
m_state[1]->m_textures[0].m_texture = shadowMapTexture;
}
// Setup lights.
float lightPos[4];
lightPos[0] = -bx::cos(time);
@ -444,6 +493,7 @@ public:
bgfx::FrameBufferHandle m_shadowMapFB;
bool m_shadowSamplerSupported;
bool m_useShadowSampler;
MeshState* m_state[2];