static void pie_DrawShadows(void)
{
const float width = pie_GetVideoBufferWidth();
const float height = pie_GetVideoBufferHeight();
pie_SetTexturePage(TEXPAGE_NONE);
glPushMatrix();
pie_SetAlphaTest(false);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDepthFunc(GL_LESS);
glDepthMask(GL_FALSE);
glEnable(GL_STENCIL_TEST);
ShadowStencilFunc();
pie_SetRendMode(REND_ALPHA);
glEnable(GL_CULL_FACE);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glStencilMask(~0);
glStencilFunc(GL_LESS, 0, ~0);
glColor4f(0, 0, 0, 0.5);
pie_PerspectiveEnd();
glLoadIdentity();
glDisable(GL_DEPTH_TEST);
glBegin(GL_TRIANGLE_STRIP);
glVertex2f(0, 0);
glVertex2f(width, 0);
glVertex2f(0, height);
glVertex2f(width, height);
glEnd();
pie_PerspectiveBegin();
pie_SetRendMode(REND_OPAQUE);
glDisable(GL_STENCIL_TEST);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glPopMatrix();
scshapes.clear();
}
static void pie_DrawShadows(void)
{
const float width = pie_GetVideoBufferWidth();
const float height = pie_GetVideoBufferHeight();
GLenum op_depth_pass_front = GL_INCR, op_depth_pass_back = GL_DECR;
pie_SetTexturePage(TEXPAGE_NONE);
glPushMatrix();
pie_SetAlphaTest(false);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDepthFunc(GL_LESS);
glDepthMask(GL_FALSE);
glEnable(GL_STENCIL_TEST);
// Check if we have the required extensions
if (GLEE_EXT_stencil_wrap)
{
op_depth_pass_front = GL_INCR_WRAP_EXT;
op_depth_pass_back = GL_DECR_WRAP_EXT;
}
// generic 1-pass version
if (GLEE_EXT_stencil_two_side)
{
glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT);
glDisable(GL_CULL_FACE);
glStencilMask(~0);
glActiveStencilFaceEXT(GL_BACK);
glStencilOp(GL_KEEP, GL_KEEP, op_depth_pass_back);
glStencilFunc(GL_ALWAYS, 0, ~0);
glActiveStencilFaceEXT(GL_FRONT);
glStencilOp(GL_KEEP, GL_KEEP, op_depth_pass_front);
glStencilFunc(GL_ALWAYS, 0, ~0);
pie_ShadowDrawLoop();
glDisable(GL_STENCIL_TEST_TWO_SIDE_EXT);
}
// check for ATI-specific 1-pass version
else if (GLEE_ATI_separate_stencil)
{
glDisable(GL_CULL_FACE);
glStencilMask(~0);
glStencilOpSeparateATI(GL_BACK, GL_KEEP, GL_KEEP, op_depth_pass_back);
glStencilOpSeparateATI(GL_FRONT, GL_KEEP, GL_KEEP, op_depth_pass_front);
glStencilFunc(GL_ALWAYS, 0, ~0);
pie_ShadowDrawLoop();
}
// fall back to default 2-pass version
else
{
glStencilMask(~0);
glStencilFunc(GL_ALWAYS, 0, ~0);
glEnable(GL_CULL_FACE);
// Setup stencil for front-facing polygons
glCullFace(GL_BACK);
glStencilOp(GL_KEEP, GL_KEEP, op_depth_pass_front);
pie_ShadowDrawLoop();
// Setup stencil for back-facing polygons
glCullFace(GL_FRONT);
glStencilOp(GL_KEEP, GL_KEEP, op_depth_pass_back);
pie_ShadowDrawLoop();
}
pie_SetRendMode(REND_ALPHA);
glEnable(GL_CULL_FACE);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
glStencilMask(~0);
glStencilFunc(GL_LESS, 0, ~0);
glColor4f(0, 0, 0, 0.5);
pie_PerspectiveEnd();
glLoadIdentity();
glDisable(GL_DEPTH_TEST);
glBegin(GL_TRIANGLE_STRIP);
glVertex2f(0, 0);
glVertex2f(width, 0);
glVertex2f(0, height);
glVertex2f(width, height);
glEnd();
pie_PerspectiveBegin();
pie_SetRendMode(REND_OPAQUE);
glDisable(GL_STENCIL_TEST);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glPopMatrix();
nb_scshapes = 0;
}
static void unsetMatrix(void)
{
pie_MatEnd();
pie_PerspectiveEnd();
}