irrlicht/source/Irrlicht/burning_shader_compile_fragment_start.h

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#include "burning_shader_compile_verify.h"
/*!
*/
void burning_shader_class::burning_shader_fragment()
{
tVideoSample *dst;
#ifdef USE_ZBUFFER
fp24 *z;
#endif
s32 xStart;
s32 xEnd;
s32 dx;
#ifdef SUBTEXEL
f32 subPixel;
#endif
#ifdef IPOL_Z
f32 slopeZ;
#endif
#ifdef IPOL_W
fp24 slopeW;
#endif
#ifdef IPOL_C0
sVec4 slopeC;
#endif
#ifdef IPOL_T0
sVec2 slopeT[BURNING_MATERIAL_MAX_TEXTURES];
#endif
// apply top-left fill-convention, left
xStart = fill_convention_left(line.x[0]);
xEnd = fill_convention_right(line.x[1]);
dx = xEnd - xStart;
if (dx < 0)
return;
// slopes
const f32 invDeltaX = fill_step_x(line.x[1] - line.x[0]);
#ifdef IPOL_Z
slopeZ = (line.z[1] - line.z[0]) * invDeltaX;
#endif
#ifdef IPOL_W
slopeW = (line.w[1] - line.w[0]) * invDeltaX;
#endif
#ifdef IPOL_C0
slopeC = (line.c[0][1] - line.c[0][0]) * invDeltaX;
#endif
#ifdef IPOL_T0
slopeT[0] = (line.t[0][1] - line.t[0][0]) * invDeltaX;
#endif
#ifdef IPOL_T1
slopeT[1] = (line.t[1][1] - line.t[1][0]) * invDeltaX;
#endif
#ifdef SUBTEXEL
subPixel = ((f32)xStart) - line.x[0];
#ifdef IPOL_Z
line.z[0] += slopeZ * subPixel;
#endif
#ifdef IPOL_W
line.w[0] += slopeW * subPixel;
#endif
#ifdef IPOL_C0
line.c[0][0] += slopeC * subPixel;
#endif
#ifdef IPOL_T0
line.t[0][0] += slopeT[0] * subPixel;
#endif
#ifdef IPOL_T1
line.t[1][0] += slopeT[1] * subPixel;
#endif
#endif
SOFTWARE_DRIVER_2_CLIPCHECK;
dst = (tVideoSample*)RenderTarget->getData() + (line.y * RenderTarget->getDimension().Width) + xStart;
#ifdef USE_ZBUFFER
z = (fp24*)DepthBuffer->lock() + (line.y * RenderTarget->getDimension().Width) + xStart;
#endif
f32 inversew = INVERSE_W_RANGE;
#ifdef IPOL_C0
tFixPoint r0, g0, b0;
#endif
#ifdef IPOL_A0
tFixPoint a0;
tFixPoint r1, g1, b1;
#endif
for (s32 i = 0; i <= dx; i+= SOFTWARE_DRIVER_2_STEP_X)
{
if ((0 == EdgeTestPass) & (i > line.x_edgetest)) break;
#ifdef CMP_Z
if (line.z[0] < z[i])
#endif
#ifdef CMP_W
if (line.w[0] >= z[i])
#endif
{
#ifdef WRITE_Z
z[i] = line.z[0];
#endif
#ifdef WRITE_W
z[i] = line.w[0];
#endif
/* Pixel Shader here */
#ifdef INVERSE_W
inversew = (INVERSE_W_RANGE) / line.w[0]; /* fix_inverse32(line.w[0]);*/
#endif