diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index 91553e275..e6ee761b0 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -1052,6 +1052,7 @@ set( FASTMATH_PCH_SOURCES r_swrenderer.cpp r_swrenderer2.cpp r_poly.cpp + r_poly_triangle.cpp r_3dfloors.cpp r_bsp.cpp r_draw.cpp diff --git a/src/r_poly.cpp b/src/r_poly.cpp index 184498692..6542afcfb 100644 --- a/src/r_poly.cpp +++ b/src/r_poly.cpp @@ -35,23 +35,12 @@ EXTERN_CVAR(Bool, r_drawplayersprites) EXTERN_CVAR(Bool, r_deathcamera) EXTERN_CVAR(Bool, st_scale) -namespace -{ - short cliptop[MAXWIDTH], clipbottom[MAXWIDTH]; -} - ///////////////////////////////////////////////////////////////////////////// void RenderPolyBsp::Render() { PolyVertexBuffer::Clear(); - for (int i = 0; i < viewwidth; i++) - { - cliptop[i] = 0; - clipbottom[i] = viewheight; - } - // Perspective correct: float ratio = WidescreenRatio; float fovratio = (WidescreenRatio >= 1.3f) ? 1.333333f : ratio; @@ -143,11 +132,11 @@ void RenderPolyBsp::RenderSubsector(subsector_t *sub) FTexture *floortex = TexMan(frontsector->GetTexture(sector_t::floor)); if (floortex->UseType != FTexture::TEX_Null) - TriangleDrawer::draw(worldToClip, floorVertices, sub->numlines, TriangleDrawMode::Fan, true, 0, viewwidth, cliptop, clipbottom, floortex); + PolyTriangleDrawer::draw(worldToClip, floorVertices, sub->numlines, TriangleDrawMode::Fan, true, 0, viewwidth, 0, viewheight, floortex); FTexture *ceiltex = TexMan(frontsector->GetTexture(sector_t::ceiling)); if (ceiltex->UseType != FTexture::TEX_Null) - TriangleDrawer::draw(worldToClip, ceilVertices, sub->numlines, TriangleDrawMode::Fan, true, 0, viewwidth, cliptop, clipbottom, ceiltex); + PolyTriangleDrawer::draw(worldToClip, ceilVertices, sub->numlines, TriangleDrawMode::Fan, true, 0, viewwidth, 0, viewheight, ceiltex); for (AActor *thing = sub->sector->thinglist; thing != nullptr; thing = thing->snext) { @@ -357,8 +346,7 @@ void RenderPolyBsp::AddSprite(AActor *thing, subsector_t *sub) vertices[i].varying[2] = (thing->Sector->lightlevel + actualextralight) / 255.0f; } - TriangleDrawer::draw(worldToClip, vertices, 4, TriangleDrawMode::Fan, true, 0, viewwidth, cliptop, clipbottom, tex); - TriangleDrawer::draw(worldToClip, vertices, 4, TriangleDrawMode::Fan, false, 0, viewwidth, cliptop, clipbottom, tex); + PolyTriangleDrawer::draw(worldToClip, vertices, 4, TriangleDrawMode::Fan, true, 0, viewwidth, 0, viewheight, tex); } void RenderPolyBsp::AddWallSprite(AActor *thing, subsector_t *sub) @@ -895,7 +883,7 @@ void RenderPolyWall::Render(const TriMatrix &worldToClip) vertices[3].varying[1] = (float)texcoords.v2; vertices[3].varying[2] = GetLightLevel() / 255.0f; - TriangleDrawer::draw(worldToClip, vertices, 4, TriangleDrawMode::Fan, true, 0, viewwidth, cliptop, clipbottom, tex); + PolyTriangleDrawer::draw(worldToClip, vertices, 4, TriangleDrawMode::Fan, true, 0, viewwidth, 0, viewheight, tex); } FTexture *RenderPolyWall::GetTexture() diff --git a/src/r_poly.h b/src/r_poly.h index cd1cd1215..7a143cf67 100644 --- a/src/r_poly.h +++ b/src/r_poly.h @@ -29,7 +29,7 @@ #include "doomdata.h" #include "r_utility.h" #include "r_main.h" -#include "r_triangle.h" +#include "r_poly_triangle.h" // DScreen accelerated sprite to be rendered class PolyScreenSprite diff --git a/src/r_poly_triangle.cpp b/src/r_poly_triangle.cpp new file mode 100644 index 000000000..73c33d024 --- /dev/null +++ b/src/r_poly_triangle.cpp @@ -0,0 +1,1054 @@ +/* +** Triangle drawers +** Copyright (c) 2016 Magnus Norddahl +** +** This software is provided 'as-is', without any express or implied +** warranty. In no event will the authors be held liable for any damages +** arising from the use of this software. +** +** Permission is granted to anyone to use this software for any purpose, +** including commercial applications, and to alter it and redistribute it +** freely, subject to the following restrictions: +** +** 1. The origin of this software must not be misrepresented; you must not +** claim that you wrote the original software. If you use this software +** in a product, an acknowledgment in the product documentation would be +** appreciated but is not required. +** 2. Altered source versions must be plainly marked as such, and must not be +** misrepresented as being the original software. +** 3. This notice may not be removed or altered from any source distribution. +** +*/ + +#include +#include "templates.h" +#include "doomdef.h" +#include "i_system.h" +#include "w_wad.h" +#include "r_local.h" +#include "v_video.h" +#include "doomstat.h" +#include "st_stuff.h" +#include "g_game.h" +#include "g_level.h" +#include "r_data/r_translate.h" +#include "v_palette.h" +#include "r_data/colormaps.h" +#include "r_poly_triangle.h" + +void PolyTriangleDrawer::draw(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, FTexture *texture) +{ + if (r_swtruecolor) + queue_arrays(objectToClip, vinput, vcount, mode, ccw, clipleft, clipright, cliptop, clipbottom, (const uint8_t*)texture->GetPixelsBgra(), texture->GetWidth(), texture->GetHeight(), 0); + else + draw_arrays(objectToClip, vinput, vcount, mode, ccw, clipleft, clipright, cliptop, clipbottom, texture->GetPixels(), texture->GetWidth(), texture->GetHeight(), 0, nullptr, &ScreenPolyTriangleDrawer::draw); +} + +void PolyTriangleDrawer::fill(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, int solidcolor) +{ + if (r_swtruecolor) + queue_arrays(objectToClip, vinput, vcount, mode, ccw, clipleft, clipright, cliptop, clipbottom, nullptr, 0, 0, solidcolor); + else + draw_arrays(objectToClip, vinput, vcount, mode, ccw, clipleft, clipright, cliptop, clipbottom, nullptr, 0, 0, solidcolor, nullptr, &ScreenPolyTriangleDrawer::fill); +} + +void PolyTriangleDrawer::queue_arrays(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor) +{ + if (clipright < clipleft || clipleft < 0 || clipright > MAXWIDTH || clipbottom < cliptop || cliptop < 0 || clipbottom > MAXHEIGHT) + return; + + DrawerCommandQueue::QueueCommand(objectToClip, vinput, vcount, mode, ccw, clipleft, clipright, cliptop, clipbottom, texturePixels, textureWidth, textureHeight, solidcolor); +} + +void PolyTriangleDrawer::draw_arrays(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor, DrawerThread *thread, void(*drawfunc)(const ScreenPolyTriangleDrawerArgs *, DrawerThread *)) +{ + if (vcount < 3) + return; + + ScreenPolyTriangleDrawerArgs args; + args.dest = dc_destorg; + args.pitch = dc_pitch; + args.clipleft = clipleft; + args.clipright = clipright; + args.cliptop = cliptop; + args.clipbottom = clipbottom; + args.texturePixels = texturePixels; + args.textureWidth = textureWidth; + args.textureHeight = textureHeight; + args.solidcolor = solidcolor; + + TriVertex vert[3]; + if (mode == TriangleDrawMode::Normal) + { + for (int i = 0; i < vcount / 3; i++) + { + for (int j = 0; j < 3; j++) + vert[j] = shade_vertex(objectToClip, *(vinput++)); + draw_shaded_triangle(vert, ccw, &args, thread, drawfunc); + } + } + else if (mode == TriangleDrawMode::Fan) + { + vert[0] = shade_vertex(objectToClip, *(vinput++)); + vert[1] = shade_vertex(objectToClip, *(vinput++)); + for (int i = 2; i < vcount; i++) + { + vert[2] = shade_vertex(objectToClip, *(vinput++)); + draw_shaded_triangle(vert, ccw, &args, thread, drawfunc); + vert[1] = vert[2]; + } + } + else // TriangleDrawMode::Strip + { + vert[0] = shade_vertex(objectToClip, *(vinput++)); + vert[1] = shade_vertex(objectToClip, *(vinput++)); + for (int i = 2; i < vcount; i++) + { + vert[2] = shade_vertex(objectToClip, *(vinput++)); + draw_shaded_triangle(vert, ccw, &args, thread, drawfunc); + vert[0] = vert[1]; + vert[1] = vert[2]; + ccw = !ccw; + } + } +} + +TriVertex PolyTriangleDrawer::shade_vertex(const TriMatrix &objectToClip, TriVertex v) +{ + // Apply transform to get clip coordinates: + return objectToClip * v; +} + +void PolyTriangleDrawer::draw_shaded_triangle(const TriVertex *vert, bool ccw, ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread, void(*drawfunc)(const ScreenPolyTriangleDrawerArgs *, DrawerThread *)) +{ + // Cull, clip and generate additional vertices as needed + TriVertex clippedvert[6]; + int numclipvert = 0; + clipedge(vert[0], vert[1], clippedvert, numclipvert); + clipedge(vert[1], vert[2], clippedvert, numclipvert); + clipedge(vert[2], vert[0], clippedvert, numclipvert); + + // Map to 2D viewport: + for (int j = 0; j < numclipvert; j++) + { + auto &v = clippedvert[j]; + + // Calculate normalized device coordinates: + v.w = 1.0f / v.w; + v.x *= v.w; + v.y *= v.w; + v.z *= v.w; + + // Apply viewport scale to get screen coordinates: + v.x = viewwidth * (1.0f + v.x) * 0.5f; + v.y = viewheight * (1.0f - v.y) * 0.5f; + } + + // Draw screen triangles + if (ccw) + { + for (int i = numclipvert; i > 1; i--) + { + args->v1 = &clippedvert[numclipvert - 1]; + args->v2 = &clippedvert[i - 1]; + args->v3 = &clippedvert[i - 2]; + drawfunc(args, thread); + } + } + else + { + for (int i = 2; i < numclipvert; i++) + { + args->v1 = &clippedvert[0]; + args->v2 = &clippedvert[i - 1]; + args->v3 = &clippedvert[i]; + drawfunc(args, thread); + } + } +} + +bool PolyTriangleDrawer::cullhalfspace(float clipdistance1, float clipdistance2, float &t1, float &t2) +{ + float d1 = clipdistance1 * (1.0f - t1) + clipdistance2 * t1; + float d2 = clipdistance1 * (1.0f - t2) + clipdistance2 * t2; + if (d1 < 0.0f && d2 < 0.0f) + return true; + + if (d1 < 0.0f) + t1 = MAX(-clipdistance1 / (clipdistance2 - clipdistance1), t1); + + if (d2 < 0.0f) + t2 = MIN(1.0f + clipdistance2 / (clipdistance1 - clipdistance2), t2); + + return false; +} + +void PolyTriangleDrawer::clipedge(const TriVertex &v1, const TriVertex &v2, TriVertex *clippedvert, int &numclipvert) +{ + // Clip and cull so that the following is true for all vertices: + // -v.w <= v.x <= v.w + // -v.w <= v.y <= v.w + // -v.w <= v.z <= v.w + + float t1 = 0.0f, t2 = 1.0f; + bool culled = + cullhalfspace(v1.x + v1.w, v2.x + v2.w, t1, t2) || + cullhalfspace(v1.w - v1.x, v2.w - v2.x, t1, t2) || + cullhalfspace(v1.y + v1.w, v2.y + v2.w, t1, t2) || + cullhalfspace(v1.w - v1.y, v2.w - v2.y, t1, t2) || + cullhalfspace(v1.z + v1.w, v2.z + v2.w, t1, t2) || + cullhalfspace(v1.w - v1.z, v2.w - v2.z, t1, t2); + if (culled) + return; + + if (t1 == 0.0f) + { + clippedvert[numclipvert++] = v1; + } + else + { + auto &v = clippedvert[numclipvert++]; + v.x = v1.x * (1.0f - t1) + v2.x * t1; + v.y = v1.y * (1.0f - t1) + v2.y * t1; + v.z = v1.z * (1.0f - t1) + v2.z * t1; + v.w = v1.w * (1.0f - t1) + v2.w * t1; + for (int i = 0; i < TriVertex::NumVarying; i++) + v.varying[i] = v1.varying[i] * (1.0f - t1) + v2.varying[i] * t1; + } + + if (t2 != 1.0f) + { + auto &v = clippedvert[numclipvert++]; + v.x = v1.x * (1.0f - t2) + v2.x * t2; + v.y = v1.y * (1.0f - t2) + v2.y * t2; + v.z = v1.z * (1.0f - t2) + v2.z * t2; + v.w = v1.w * (1.0f - t2) + v2.w * t2; + for (int i = 0; i < TriVertex::NumVarying; i++) + v.varying[i] = v1.varying[i] * (1.0f - t2) + v2.varying[i] * t2; + } +} + +///////////////////////////////////////////////////////////////////////////// + +void ScreenPolyTriangleDrawer::draw(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread) +{ + uint8_t *dest = args->dest; + int pitch = args->pitch; + const TriVertex &v1 = *args->v1; + const TriVertex &v2 = *args->v2; + const TriVertex &v3 = *args->v3; + int clipleft = args->clipleft; + int clipright = args->clipright; + int cliptop = args->cliptop; + int clipbottom = args->clipbottom; + const uint8_t *texturePixels = args->texturePixels; + int textureWidth = args->textureWidth; + int textureHeight = args->textureHeight; + + // 28.4 fixed-point coordinates + const int Y1 = (int)round(16.0f * v1.y); + const int Y2 = (int)round(16.0f * v2.y); + const int Y3 = (int)round(16.0f * v3.y); + + const int X1 = (int)round(16.0f * v1.x); + const int X2 = (int)round(16.0f * v2.x); + const int X3 = (int)round(16.0f * v3.x); + + // Deltas + const int DX12 = X1 - X2; + const int DX23 = X2 - X3; + const int DX31 = X3 - X1; + + const int DY12 = Y1 - Y2; + const int DY23 = Y2 - Y3; + const int DY31 = Y3 - Y1; + + // Fixed-point deltas + const int FDX12 = DX12 << 4; + const int FDX23 = DX23 << 4; + const int FDX31 = DX31 << 4; + + const int FDY12 = DY12 << 4; + const int FDY23 = DY23 << 4; + const int FDY31 = DY31 << 4; + + // Bounding rectangle + int minx = MAX((MIN(MIN(X1, X2), X3) + 0xF) >> 4, clipleft); + int maxx = MIN((MAX(MAX(X1, X2), X3) + 0xF) >> 4, clipright - 1); + int miny = MAX((MIN(MIN(Y1, Y2), Y3) + 0xF) >> 4, cliptop); + int maxy = MIN((MAX(MAX(Y1, Y2), Y3) + 0xF) >> 4, clipbottom - 1); + if (minx >= maxx || miny >= maxy) + return; + + // Block size, standard 8x8 (must be power of two) + const int q = 8; + + // Start in corner of 8x8 block + minx &= ~(q - 1); + miny &= ~(q - 1); + + dest += miny * pitch; + + // Half-edge constants + int C1 = DY12 * X1 - DX12 * Y1; + int C2 = DY23 * X2 - DX23 * Y2; + int C3 = DY31 * X3 - DX31 * Y3; + + // Correct for fill convention + if (DY12 < 0 || (DY12 == 0 && DX12 > 0)) C1++; + if (DY23 < 0 || (DY23 == 0 && DX23 > 0)) C2++; + if (DY31 < 0 || (DY31 == 0 && DX31 > 0)) C3++; + + // Gradients + float gradWX = gradx(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.w, v2.w, v3.w); + float gradWY = grady(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.w, v2.w, v3.w); + float startW = v1.w + gradWX * (minx - v1.x) + gradWY * (miny - v1.y); + float gradVaryingX[TriVertex::NumVarying], gradVaryingY[TriVertex::NumVarying], startVarying[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + gradVaryingX[i] = gradx(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.varying[i] * v1.w, v2.varying[i] * v2.w, v3.varying[i] * v3.w); + gradVaryingY[i] = grady(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.varying[i] * v1.w, v2.varying[i] * v2.w, v3.varying[i] * v3.w); + startVarying[i] = v1.varying[i] * v1.w + gradVaryingX[i] * (minx - v1.x) + gradVaryingY[i] * (miny - v1.y); + } + + // Loop through blocks + for (int y = miny; y < maxy; y += q, dest += q * pitch) + { + // Is this row of blocks done by this thread? + if (thread->skipped_by_thread(y / q)) continue; + + for (int x = minx; x < maxx; x += q) + { + // Corners of block + int x0 = x << 4; + int x1 = (x + q - 1) << 4; + int y0 = y << 4; + int y1 = (y + q - 1) << 4; + + // Evaluate half-space functions + bool a00 = C1 + DX12 * y0 - DY12 * x0 > 0; + bool a10 = C1 + DX12 * y0 - DY12 * x1 > 0; + bool a01 = C1 + DX12 * y1 - DY12 * x0 > 0; + bool a11 = C1 + DX12 * y1 - DY12 * x1 > 0; + int a = (a00 << 0) | (a10 << 1) | (a01 << 2) | (a11 << 3); + + bool b00 = C2 + DX23 * y0 - DY23 * x0 > 0; + bool b10 = C2 + DX23 * y0 - DY23 * x1 > 0; + bool b01 = C2 + DX23 * y1 - DY23 * x0 > 0; + bool b11 = C2 + DX23 * y1 - DY23 * x1 > 0; + int b = (b00 << 0) | (b10 << 1) | (b01 << 2) | (b11 << 3); + + bool c00 = C3 + DX31 * y0 - DY31 * x0 > 0; + bool c10 = C3 + DX31 * y0 - DY31 * x1 > 0; + bool c01 = C3 + DX31 * y1 - DY31 * x0 > 0; + bool c11 = C3 + DX31 * y1 - DY31 * x1 > 0; + int c = (c00 << 0) | (c10 << 1) | (c01 << 2) | (c11 << 3); + + // Skip block when outside an edge + if (a == 0x0 || b == 0x0 || c == 0x0) continue; + + // Check if block needs clipping + bool clipneeded = clipleft > x || clipright < (x + q) || cliptop > y || clipbottom < (y + q); + + // Calculate varying variables for affine block + float offx0 = (x - minx) + 0.5f; + float offy0 = (y - miny) + 0.5f; + float offx1 = offx0 + q; + float offy1 = offy0 + q; + float rcpWTL = 1.0f / (startW + offx0 * gradWX + offy0 * gradWY); + float rcpWTR = 1.0f / (startW + offx1 * gradWX + offy0 * gradWY); + float rcpWBL = 1.0f / (startW + offx0 * gradWX + offy1 * gradWY); + float rcpWBR = 1.0f / (startW + offx1 * gradWX + offy1 * gradWY); + float varyingTL[TriVertex::NumVarying]; + float varyingTR[TriVertex::NumVarying]; + float varyingBL[TriVertex::NumVarying]; + float varyingBR[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + varyingTL[i] = (startVarying[i] + offx0 * gradVaryingX[i] + offy0 * gradVaryingY[i]) * rcpWTL; + varyingTR[i] = (startVarying[i] + offx1 * gradVaryingX[i] + offy0 * gradVaryingY[i]) * rcpWTR; + varyingBL[i] = ((startVarying[i] + offx0 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBL - varyingTL[i]) * (1.0f / q); + varyingBR[i] = ((startVarying[i] + offx1 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBR - varyingTR[i]) * (1.0f / q); + } + + uint8_t *buffer = dest; + + // Accept whole block when totally covered + if (a == 0xF && b == 0xF && c == 0xF && !clipneeded) + { + for (int iy = 0; iy < q; iy++) + { + float varying[TriVertex::NumVarying], varyingStep[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + varying[i] = varyingTL[i] + varyingBL[i] * iy; + varyingStep[i] = (varyingTR[i] + varyingBR[i] * iy - varying[i]) * (1.0f / q); + } + + for (int ix = x; ix < x + q; ix++) + { + uint32_t ufrac = (uint32_t)((varying[0] - floor(varying[0])) * 0x100000000LL); + uint32_t vfrac = (uint32_t)((varying[1] - floor(varying[1])) * 0x100000000LL); + //uint32_t light = (uint32_t)clamp(varying[2] * 255.0f + 0.5f, 0.0f, 255.0f); + + uint32_t upos = ((ufrac >> 16) * textureWidth) >> 16; + uint32_t vpos = ((vfrac >> 16) * textureHeight) >> 16; + uint32_t uvoffset = upos * textureHeight + vpos; + + buffer[ix] = texturePixels[uvoffset]; + + for (int i = 0; i < TriVertex::NumVarying; i++) + varying[i] += varyingStep[i]; + } + + buffer += pitch; + } + } + else // Partially covered block + { + int CY1 = C1 + DX12 * y0 - DY12 * x0; + int CY2 = C2 + DX23 * y0 - DY23 * x0; + int CY3 = C3 + DX31 * y0 - DY31 * x0; + + for (int iy = 0; iy < q; iy++) + { + int CX1 = CY1; + int CX2 = CY2; + int CX3 = CY3; + + float varying[TriVertex::NumVarying], varyingStep[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + varying[i] = varyingTL[i] + varyingBL[i] * iy; + varyingStep[i] = (varyingTR[i] + varyingBR[i] * iy - varying[i]) * (1.0f / q); + } + + for (int ix = x; ix < x + q; ix++) + { + bool visible = ix >= clipleft && ix <= clipright && (cliptop <= y + iy) && (clipbottom > y + iy); + + if (CX1 > 0 && CX2 > 0 && CX3 > 0 && visible) + { + uint32_t ufrac = (uint32_t)((varying[0] - floor(varying[0])) * 0x100000000LL); + uint32_t vfrac = (uint32_t)((varying[1] - floor(varying[1])) * 0x100000000LL); + //uint32_t light = (uint32_t)clamp(varying[2] * 255.0f + 0.5f, 0.0f, 255.0f); + + uint32_t upos = ((ufrac >> 16) * textureWidth) >> 16; + uint32_t vpos = ((vfrac >> 16) * textureHeight) >> 16; + uint32_t uvoffset = upos * textureHeight + vpos; + + buffer[ix] = texturePixels[uvoffset]; + } + + for (int i = 0; i < TriVertex::NumVarying; i++) + varying[i] += varyingStep[i]; + + CX1 -= FDY12; + CX2 -= FDY23; + CX3 -= FDY31; + } + + CY1 += FDX12; + CY2 += FDX23; + CY3 += FDX31; + + buffer += pitch; + } + } + } + } +} + +void ScreenPolyTriangleDrawer::fill(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread) +{ + uint8_t *dest = args->dest; + int pitch = args->pitch; + const TriVertex &v1 = *args->v1; + const TriVertex &v2 = *args->v2; + const TriVertex &v3 = *args->v3; + int clipleft = args->clipleft; + int clipright = args->clipright; + int cliptop = args->cliptop; + int clipbottom = args->clipbottom; + int solidcolor = args->solidcolor; + + // 28.4 fixed-point coordinates + const int Y1 = (int)round(16.0f * v1.y); + const int Y2 = (int)round(16.0f * v2.y); + const int Y3 = (int)round(16.0f * v3.y); + + const int X1 = (int)round(16.0f * v1.x); + const int X2 = (int)round(16.0f * v2.x); + const int X3 = (int)round(16.0f * v3.x); + + // Deltas + const int DX12 = X1 - X2; + const int DX23 = X2 - X3; + const int DX31 = X3 - X1; + + const int DY12 = Y1 - Y2; + const int DY23 = Y2 - Y3; + const int DY31 = Y3 - Y1; + + // Fixed-point deltas + const int FDX12 = DX12 << 4; + const int FDX23 = DX23 << 4; + const int FDX31 = DX31 << 4; + + const int FDY12 = DY12 << 4; + const int FDY23 = DY23 << 4; + const int FDY31 = DY31 << 4; + + // Bounding rectangle + int minx = MAX((MIN(MIN(X1, X2), X3) + 0xF) >> 4, clipleft); + int maxx = MIN((MAX(MAX(X1, X2), X3) + 0xF) >> 4, clipright - 1); + int miny = MAX((MIN(MIN(Y1, Y2), Y3) + 0xF) >> 4, cliptop); + int maxy = MIN((MAX(MAX(Y1, Y2), Y3) + 0xF) >> 4, clipbottom - 1); + if (minx >= maxx || miny >= maxy) + return; + + // Block size, standard 8x8 (must be power of two) + const int q = 8; + + // Start in corner of 8x8 block + minx &= ~(q - 1); + miny &= ~(q - 1); + + dest += miny * pitch; + + // Half-edge constants + int C1 = DY12 * X1 - DX12 * Y1; + int C2 = DY23 * X2 - DX23 * Y2; + int C3 = DY31 * X3 - DX31 * Y3; + + // Correct for fill convention + if (DY12 < 0 || (DY12 == 0 && DX12 > 0)) C1++; + if (DY23 < 0 || (DY23 == 0 && DX23 > 0)) C2++; + if (DY31 < 0 || (DY31 == 0 && DX31 > 0)) C3++; + + // Loop through blocks + for (int y = miny; y < maxy; y += q, dest += q * pitch) + { + // Is this row of blocks done by this thread? + if (thread->skipped_by_thread(y / q)) continue; + + for (int x = minx; x < maxx; x += q) + { + // Corners of block + int x0 = x << 4; + int x1 = (x + q - 1) << 4; + int y0 = y << 4; + int y1 = (y + q - 1) << 4; + + // Evaluate half-space functions + bool a00 = C1 + DX12 * y0 - DY12 * x0 > 0; + bool a10 = C1 + DX12 * y0 - DY12 * x1 > 0; + bool a01 = C1 + DX12 * y1 - DY12 * x0 > 0; + bool a11 = C1 + DX12 * y1 - DY12 * x1 > 0; + int a = (a00 << 0) | (a10 << 1) | (a01 << 2) | (a11 << 3); + + bool b00 = C2 + DX23 * y0 - DY23 * x0 > 0; + bool b10 = C2 + DX23 * y0 - DY23 * x1 > 0; + bool b01 = C2 + DX23 * y1 - DY23 * x0 > 0; + bool b11 = C2 + DX23 * y1 - DY23 * x1 > 0; + int b = (b00 << 0) | (b10 << 1) | (b01 << 2) | (b11 << 3); + + bool c00 = C3 + DX31 * y0 - DY31 * x0 > 0; + bool c10 = C3 + DX31 * y0 - DY31 * x1 > 0; + bool c01 = C3 + DX31 * y1 - DY31 * x0 > 0; + bool c11 = C3 + DX31 * y1 - DY31 * x1 > 0; + int c = (c00 << 0) | (c10 << 1) | (c01 << 2) | (c11 << 3); + + // Skip block when outside an edge + if (a == 0x0 || b == 0x0 || c == 0x0) continue; + + // Check if block needs clipping + bool clipneeded = clipleft > x || clipright < (x + q) || cliptop > y || clipbottom < (y + q); + + uint8_t *buffer = dest; + + // Accept whole block when totally covered + if (a == 0xF && b == 0xF && c == 0xF && !clipneeded) + { + for (int iy = 0; iy < q; iy++) + { + for (int ix = x; ix < x + q; ix++) + { + buffer[ix] = solidcolor; + } + + buffer += pitch; + } + } + else // Partially covered block + { + int CY1 = C1 + DX12 * y0 - DY12 * x0; + int CY2 = C2 + DX23 * y0 - DY23 * x0; + int CY3 = C3 + DX31 * y0 - DY31 * x0; + + for (int iy = 0; iy < q; iy++) + { + int CX1 = CY1; + int CX2 = CY2; + int CX3 = CY3; + + for (int ix = x; ix < x + q; ix++) + { + bool visible = ix >= clipleft && ix <= clipright && (cliptop <= y + iy) && (clipbottom > y + iy); + + if (CX1 > 0 && CX2 > 0 && CX3 > 0 && visible) + { + buffer[ix] = solidcolor; + } + + CX1 -= FDY12; + CX2 -= FDY23; + CX3 -= FDY31; + } + + CY1 += FDX12; + CY2 += FDX23; + CY3 += FDX31; + + buffer += pitch; + } + } + } + } +} + +void ScreenPolyTriangleDrawer::draw32(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread) +{ + uint32_t *dest = (uint32_t *)args->dest; + int pitch = args->pitch; + const TriVertex &v1 = *args->v1; + const TriVertex &v2 = *args->v2; + const TriVertex &v3 = *args->v3; + int clipleft = args->clipleft; + int clipright = args->clipright; + int cliptop = args->cliptop; + int clipbottom = args->clipbottom; + const uint32_t *texturePixels = (const uint32_t *)args->texturePixels; + int textureWidth = args->textureWidth; + int textureHeight = args->textureHeight; + + // 28.4 fixed-point coordinates + const int Y1 = (int)round(16.0f * v1.y); + const int Y2 = (int)round(16.0f * v2.y); + const int Y3 = (int)round(16.0f * v3.y); + + const int X1 = (int)round(16.0f * v1.x); + const int X2 = (int)round(16.0f * v2.x); + const int X3 = (int)round(16.0f * v3.x); + + // Deltas + const int DX12 = X1 - X2; + const int DX23 = X2 - X3; + const int DX31 = X3 - X1; + + const int DY12 = Y1 - Y2; + const int DY23 = Y2 - Y3; + const int DY31 = Y3 - Y1; + + // Fixed-point deltas + const int FDX12 = DX12 << 4; + const int FDX23 = DX23 << 4; + const int FDX31 = DX31 << 4; + + const int FDY12 = DY12 << 4; + const int FDY23 = DY23 << 4; + const int FDY31 = DY31 << 4; + + // Bounding rectangle + int minx = MAX((MIN(MIN(X1, X2), X3) + 0xF) >> 4, clipleft); + int maxx = MIN((MAX(MAX(X1, X2), X3) + 0xF) >> 4, clipright - 1); + int miny = MAX((MIN(MIN(Y1, Y2), Y3) + 0xF) >> 4, cliptop); + int maxy = MIN((MAX(MAX(Y1, Y2), Y3) + 0xF) >> 4, clipbottom - 1); + if (minx >= maxx || miny >= maxy) + return; + + // Block size, standard 8x8 (must be power of two) + const int q = 8; + + // Start in corner of 8x8 block + minx &= ~(q - 1); + miny &= ~(q - 1); + + dest += miny * pitch; + + // Half-edge constants + int C1 = DY12 * X1 - DX12 * Y1; + int C2 = DY23 * X2 - DX23 * Y2; + int C3 = DY31 * X3 - DX31 * Y3; + + // Correct for fill convention + if (DY12 < 0 || (DY12 == 0 && DX12 > 0)) C1++; + if (DY23 < 0 || (DY23 == 0 && DX23 > 0)) C2++; + if (DY31 < 0 || (DY31 == 0 && DX31 > 0)) C3++; + + // Gradients + float gradWX = gradx(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.w, v2.w, v3.w); + float gradWY = grady(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.w, v2.w, v3.w); + float startW = v1.w + gradWX * (minx - v1.x) + gradWY * (miny - v1.y); + float gradVaryingX[TriVertex::NumVarying], gradVaryingY[TriVertex::NumVarying], startVarying[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + gradVaryingX[i] = gradx(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.varying[i] * v1.w, v2.varying[i] * v2.w, v3.varying[i] * v3.w); + gradVaryingY[i] = grady(v1.x, v1.y, v2.x, v2.y, v3.x, v3.y, v1.varying[i] * v1.w, v2.varying[i] * v2.w, v3.varying[i] * v3.w); + startVarying[i] = v1.varying[i] * v1.w + gradVaryingX[i] * (minx - v1.x) + gradVaryingY[i] * (miny - v1.y); + } + + // Loop through blocks + for (int y = miny; y < maxy; y += q, dest += q * pitch) + { + // Is this row of blocks done by this thread? + if (thread->skipped_by_thread(y / q)) continue; + + for (int x = minx; x < maxx; x += q) + { + // Corners of block + int x0 = x << 4; + int x1 = (x + q - 1) << 4; + int y0 = y << 4; + int y1 = (y + q - 1) << 4; + + // Evaluate half-space functions + bool a00 = C1 + DX12 * y0 - DY12 * x0 > 0; + bool a10 = C1 + DX12 * y0 - DY12 * x1 > 0; + bool a01 = C1 + DX12 * y1 - DY12 * x0 > 0; + bool a11 = C1 + DX12 * y1 - DY12 * x1 > 0; + int a = (a00 << 0) | (a10 << 1) | (a01 << 2) | (a11 << 3); + + bool b00 = C2 + DX23 * y0 - DY23 * x0 > 0; + bool b10 = C2 + DX23 * y0 - DY23 * x1 > 0; + bool b01 = C2 + DX23 * y1 - DY23 * x0 > 0; + bool b11 = C2 + DX23 * y1 - DY23 * x1 > 0; + int b = (b00 << 0) | (b10 << 1) | (b01 << 2) | (b11 << 3); + + bool c00 = C3 + DX31 * y0 - DY31 * x0 > 0; + bool c10 = C3 + DX31 * y0 - DY31 * x1 > 0; + bool c01 = C3 + DX31 * y1 - DY31 * x0 > 0; + bool c11 = C3 + DX31 * y1 - DY31 * x1 > 0; + int c = (c00 << 0) | (c10 << 1) | (c01 << 2) | (c11 << 3); + + // Skip block when outside an edge + if (a == 0x0 || b == 0x0 || c == 0x0) continue; + + // Check if block needs clipping + bool clipneeded = clipleft > x || clipright < (x + q) || cliptop > y || clipbottom < (y + q); + + // Calculate varying variables for affine block + float offx0 = (x - minx) + 0.5f; + float offy0 = (y - miny) + 0.5f; + float offx1 = offx0 + q; + float offy1 = offy0 + q; + float rcpWTL = 1.0f / (startW + offx0 * gradWX + offy0 * gradWY); + float rcpWTR = 1.0f / (startW + offx1 * gradWX + offy0 * gradWY); + float rcpWBL = 1.0f / (startW + offx0 * gradWX + offy1 * gradWY); + float rcpWBR = 1.0f / (startW + offx1 * gradWX + offy1 * gradWY); + float varyingTL[TriVertex::NumVarying]; + float varyingTR[TriVertex::NumVarying]; + float varyingBL[TriVertex::NumVarying]; + float varyingBR[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + varyingTL[i] = (startVarying[i] + offx0 * gradVaryingX[i] + offy0 * gradVaryingY[i]) * rcpWTL; + varyingTR[i] = (startVarying[i] + offx1 * gradVaryingX[i] + offy0 * gradVaryingY[i]) * rcpWTR; + varyingBL[i] = ((startVarying[i] + offx0 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBL - varyingTL[i]) * (1.0f / q); + varyingBR[i] = ((startVarying[i] + offx1 * gradVaryingX[i] + offy1 * gradVaryingY[i]) * rcpWBR - varyingTR[i]) * (1.0f / q); + } + + uint32_t *buffer = dest; + + // Accept whole block when totally covered + if (a == 0xF && b == 0xF && c == 0xF && !clipneeded) + { + for (int iy = 0; iy < q; iy++) + { + float varying[TriVertex::NumVarying], varyingStep[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + varying[i] = varyingTL[i] + varyingBL[i] * iy; + varyingStep[i] = (varyingTR[i] + varyingBR[i] * iy - varying[i]) * (1.0f / q); + } + + for (int ix = x; ix < x + q; ix++) + { + uint32_t ufrac = (uint32_t)((varying[0] - floor(varying[0])) * 0x100000000LL); + uint32_t vfrac = (uint32_t)((varying[1] - floor(varying[1])) * 0x100000000LL); + uint32_t light = (uint32_t)clamp(varying[2] * 256.0f + 0.5f, 0.0f, 256.0f); + + uint32_t upos = ((ufrac >> 16) * textureWidth) >> 16; + uint32_t vpos = ((vfrac >> 16) * textureHeight) >> 16; + uint32_t uvoffset = upos * textureHeight + vpos; + + uint32_t fg = texturePixels[uvoffset]; + uint32_t fg_red = (RPART(fg) * light) >> 8; + uint32_t fg_green = (GPART(fg) * light) >> 8; + uint32_t fg_blue = (BPART(fg) * light) >> 8; + uint32_t fg_alpha = APART(fg); + + if (fg_alpha > 127) + buffer[ix] = 0xff000000 | (fg_red << 16) | (fg_green << 8) | fg_blue; + + for (int i = 0; i < TriVertex::NumVarying; i++) + varying[i] += varyingStep[i]; + } + + buffer += pitch; + } + } + else // Partially covered block + { + int CY1 = C1 + DX12 * y0 - DY12 * x0; + int CY2 = C2 + DX23 * y0 - DY23 * x0; + int CY3 = C3 + DX31 * y0 - DY31 * x0; + + for (int iy = 0; iy < q; iy++) + { + int CX1 = CY1; + int CX2 = CY2; + int CX3 = CY3; + + float varying[TriVertex::NumVarying], varyingStep[TriVertex::NumVarying]; + for (int i = 0; i < TriVertex::NumVarying; i++) + { + varying[i] = varyingTL[i] + varyingBL[i] * iy; + varyingStep[i] = (varyingTR[i] + varyingBR[i] * iy - varying[i]) * (1.0f / q); + } + + for (int ix = x; ix < x + q; ix++) + { + bool visible = ix >= clipleft && ix <= clipright && (cliptop <= y + iy) && (clipbottom > y + iy); + + if (CX1 > 0 && CX2 > 0 && CX3 > 0 && visible) + { + uint32_t ufrac = (uint32_t)((varying[0] - floor(varying[0])) * 0x100000000LL); + uint32_t vfrac = (uint32_t)((varying[1] - floor(varying[1])) * 0x100000000LL); + uint32_t light = (uint32_t)clamp(varying[2] * 256.0f + 0.5f, 0.0f, 256.0f); + + uint32_t upos = ((ufrac >> 16) * textureWidth) >> 16; + uint32_t vpos = ((vfrac >> 16) * textureHeight) >> 16; + uint32_t uvoffset = upos * textureHeight + vpos; + + uint32_t fg = texturePixels[uvoffset]; + uint32_t fg_red = (RPART(fg) * light) >> 8; + uint32_t fg_green = (GPART(fg) * light) >> 8; + uint32_t fg_blue = (BPART(fg) * light) >> 8; + uint32_t fg_alpha = APART(fg); + + if (fg_alpha > 127) + buffer[ix] = 0xff000000 | (fg_red << 16) | (fg_green << 8) | fg_blue; + } + + for (int i = 0; i < TriVertex::NumVarying; i++) + varying[i] += varyingStep[i]; + + CX1 -= FDY12; + CX2 -= FDY23; + CX3 -= FDY31; + } + + CY1 += FDX12; + CY2 += FDX23; + CY3 += FDX31; + + buffer += pitch; + } + } + } + } +} + +void ScreenPolyTriangleDrawer::fill32(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread) +{ + uint32_t *dest = (uint32_t *)args->dest; + int pitch = args->pitch; + const TriVertex &v1 = *args->v1; + const TriVertex &v2 = *args->v2; + const TriVertex &v3 = *args->v3; + int clipleft = args->clipleft; + int clipright = args->clipright; + int cliptop = args->cliptop; + int clipbottom = args->clipbottom; + int solidcolor = args->solidcolor; + + // 28.4 fixed-point coordinates + const int Y1 = (int)round(16.0f * v1.y); + const int Y2 = (int)round(16.0f * v2.y); + const int Y3 = (int)round(16.0f * v3.y); + + const int X1 = (int)round(16.0f * v1.x); + const int X2 = (int)round(16.0f * v2.x); + const int X3 = (int)round(16.0f * v3.x); + + // Deltas + const int DX12 = X1 - X2; + const int DX23 = X2 - X3; + const int DX31 = X3 - X1; + + const int DY12 = Y1 - Y2; + const int DY23 = Y2 - Y3; + const int DY31 = Y3 - Y1; + + // Fixed-point deltas + const int FDX12 = DX12 << 4; + const int FDX23 = DX23 << 4; + const int FDX31 = DX31 << 4; + + const int FDY12 = DY12 << 4; + const int FDY23 = DY23 << 4; + const int FDY31 = DY31 << 4; + + // Bounding rectangle + int minx = MAX((MIN(MIN(X1, X2), X3) + 0xF) >> 4, clipleft); + int maxx = MIN((MAX(MAX(X1, X2), X3) + 0xF) >> 4, clipright - 1); + int miny = MAX((MIN(MIN(Y1, Y2), Y3) + 0xF) >> 4, cliptop); + int maxy = MIN((MAX(MAX(Y1, Y2), Y3) + 0xF) >> 4, clipbottom - 1); + if (minx >= maxx || miny >= maxy) + return; + + // Block size, standard 8x8 (must be power of two) + const int q = 8; + + // Start in corner of 8x8 block + minx &= ~(q - 1); + miny &= ~(q - 1); + + dest += miny * pitch; + + // Half-edge constants + int C1 = DY12 * X1 - DX12 * Y1; + int C2 = DY23 * X2 - DX23 * Y2; + int C3 = DY31 * X3 - DX31 * Y3; + + // Correct for fill convention + if (DY12 < 0 || (DY12 == 0 && DX12 > 0)) C1++; + if (DY23 < 0 || (DY23 == 0 && DX23 > 0)) C2++; + if (DY31 < 0 || (DY31 == 0 && DX31 > 0)) C3++; + + // Loop through blocks + for (int y = miny; y < maxy; y += q, dest += q * pitch) + { + // Is this row of blocks done by this thread? + if (thread->skipped_by_thread(y / q)) continue; + + for (int x = minx; x < maxx; x += q) + { + // Corners of block + int x0 = x << 4; + int x1 = (x + q - 1) << 4; + int y0 = y << 4; + int y1 = (y + q - 1) << 4; + + // Evaluate half-space functions + bool a00 = C1 + DX12 * y0 - DY12 * x0 > 0; + bool a10 = C1 + DX12 * y0 - DY12 * x1 > 0; + bool a01 = C1 + DX12 * y1 - DY12 * x0 > 0; + bool a11 = C1 + DX12 * y1 - DY12 * x1 > 0; + int a = (a00 << 0) | (a10 << 1) | (a01 << 2) | (a11 << 3); + + bool b00 = C2 + DX23 * y0 - DY23 * x0 > 0; + bool b10 = C2 + DX23 * y0 - DY23 * x1 > 0; + bool b01 = C2 + DX23 * y1 - DY23 * x0 > 0; + bool b11 = C2 + DX23 * y1 - DY23 * x1 > 0; + int b = (b00 << 0) | (b10 << 1) | (b01 << 2) | (b11 << 3); + + bool c00 = C3 + DX31 * y0 - DY31 * x0 > 0; + bool c10 = C3 + DX31 * y0 - DY31 * x1 > 0; + bool c01 = C3 + DX31 * y1 - DY31 * x0 > 0; + bool c11 = C3 + DX31 * y1 - DY31 * x1 > 0; + int c = (c00 << 0) | (c10 << 1) | (c01 << 2) | (c11 << 3); + + // Skip block when outside an edge + if (a == 0x0 || b == 0x0 || c == 0x0) continue; + + // Check if block needs clipping + bool clipneeded = clipleft > x || clipright < (x + q) || cliptop > y || clipbottom < (y + q); + + uint32_t *buffer = dest; + + // Accept whole block when totally covered + if (a == 0xF && b == 0xF && c == 0xF && !clipneeded) + { + for (int iy = 0; iy < q; iy++) + { + for (int ix = x; ix < x + q; ix++) + { + buffer[ix] = solidcolor; + } + + buffer += pitch; + } + } + else // Partially covered block + { + int CY1 = C1 + DX12 * y0 - DY12 * x0; + int CY2 = C2 + DX23 * y0 - DY23 * x0; + int CY3 = C3 + DX31 * y0 - DY31 * x0; + + for (int iy = 0; iy < q; iy++) + { + int CX1 = CY1; + int CX2 = CY2; + int CX3 = CY3; + + for (int ix = x; ix < x + q; ix++) + { + bool visible = ix >= clipleft && ix <= clipright && (cliptop <= y + iy) && (clipbottom > y + iy); + + if (CX1 > 0 && CX2 > 0 && CX3 > 0 && visible) + { + buffer[ix] = solidcolor; + } + + CX1 -= FDY12; + CX2 -= FDY23; + CX3 -= FDY31; + } + + CY1 += FDX12; + CY2 += FDX23; + CY3 += FDX31; + + buffer += pitch; + } + } + } + } +} + +float ScreenPolyTriangleDrawer::gradx(float x0, float y0, float x1, float y1, float x2, float y2, float c0, float c1, float c2) +{ + float top = (c1 - c2) * (y0 - y2) - (c0 - c2) * (y1 - y2); + float bottom = (x1 - x2) * (y0 - y2) - (x0 - x2) * (y1 - y2); + return top / bottom; +} + +float ScreenPolyTriangleDrawer::grady(float x0, float y0, float x1, float y1, float x2, float y2, float c0, float c1, float c2) +{ + float top = (c1 - c2) * (x0 - x2) - (c0 - c2) * (x1 - x2); + float bottom = -((x1 - x2) * (y0 - y2) - (x0 - x2) * (y1 - y2)); + return top / bottom; +} + +///////////////////////////////////////////////////////////////////////////// + +DrawPolyTrianglesCommand::DrawPolyTrianglesCommand(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor) + : objectToClip(objectToClip), vinput(vinput), vcount(vcount), mode(mode), ccw(ccw), clipleft(clipleft), clipright(clipright), cliptop(cliptop), clipbottom(clipbottom), texturePixels(texturePixels), textureWidth(textureWidth), textureHeight(textureHeight), solidcolor(solidcolor) +{ +} + +void DrawPolyTrianglesCommand::Execute(DrawerThread *thread) +{ + PolyTriangleDrawer::draw_arrays( + objectToClip, vinput, vcount, mode, ccw, + clipleft, clipright, cliptop, clipbottom, + texturePixels, textureWidth, textureHeight, solidcolor, + thread, texturePixels ? ScreenPolyTriangleDrawer::draw32 : ScreenPolyTriangleDrawer::fill32); +} + +FString DrawPolyTrianglesCommand::DebugInfo() +{ + return "DrawPolyTriangles"; +} diff --git a/src/r_poly_triangle.h b/src/r_poly_triangle.h new file mode 100644 index 000000000..de9cd543c --- /dev/null +++ b/src/r_poly_triangle.h @@ -0,0 +1,104 @@ +/* +** Triangle drawers +** Copyright (c) 2016 Magnus Norddahl +** +** This software is provided 'as-is', without any express or implied +** warranty. In no event will the authors be held liable for any damages +** arising from the use of this software. +** +** Permission is granted to anyone to use this software for any purpose, +** including commercial applications, and to alter it and redistribute it +** freely, subject to the following restrictions: +** +** 1. The origin of this software must not be misrepresented; you must not +** claim that you wrote the original software. If you use this software +** in a product, an acknowledgment in the product documentation would be +** appreciated but is not required. +** 2. Altered source versions must be plainly marked as such, and must not be +** misrepresented as being the original software. +** 3. This notice may not be removed or altered from any source distribution. +** +*/ + + +#ifndef __R_POLY_TRIANGLE__ +#define __R_POLY_TRIANGLE__ + +#include "r_triangle.h" + +struct ScreenPolyTriangleDrawerArgs; + +class PolyTriangleDrawer +{ +public: + static void draw(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, FTexture *texture); + static void fill(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, int solidcolor); + +private: + static TriVertex shade_vertex(const TriMatrix &objectToClip, TriVertex v); + static void draw_arrays(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor, DrawerThread *thread, void(*drawfunc)(const ScreenPolyTriangleDrawerArgs *, DrawerThread *)); + static void draw_shaded_triangle(const TriVertex *vertices, bool ccw, ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread, void(*drawfunc)(const ScreenPolyTriangleDrawerArgs *, DrawerThread *)); + static bool cullhalfspace(float clipdistance1, float clipdistance2, float &t1, float &t2); + static void clipedge(const TriVertex &v1, const TriVertex &v2, TriVertex *clippedvert, int &numclipvert); + + static void queue_arrays(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor); + + friend class DrawPolyTrianglesCommand; +}; + +struct ScreenPolyTriangleDrawerArgs +{ + uint8_t *dest; + int pitch; + TriVertex *v1; + TriVertex *v2; + TriVertex *v3; + int clipleft; + int clipright; + int cliptop; + int clipbottom; + const uint8_t *texturePixels; + int textureWidth; + int textureHeight; + int solidcolor; +}; + +class ScreenPolyTriangleDrawer +{ +public: + static void draw(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread); + static void fill(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread); + + static void draw32(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread); + static void fill32(const ScreenPolyTriangleDrawerArgs *args, DrawerThread *thread); + +private: + static float gradx(float x0, float y0, float x1, float y1, float x2, float y2, float c0, float c1, float c2); + static float grady(float x0, float y0, float x1, float y1, float x2, float y2, float c0, float c1, float c2); +}; + +class DrawPolyTrianglesCommand : public DrawerCommand +{ +public: + DrawPolyTrianglesCommand(const TriMatrix &objectToClip, const TriVertex *vinput, int vcount, TriangleDrawMode mode, bool ccw, int clipleft, int clipright, int cliptop, int clipbottom, const uint8_t *texturePixels, int textureWidth, int textureHeight, int solidcolor); + + void Execute(DrawerThread *thread) override; + FString DebugInfo() override; + +private: + TriMatrix objectToClip; + const TriVertex *vinput; + int vcount; + TriangleDrawMode mode; + bool ccw; + int clipleft; + int clipright; + int cliptop; + int clipbottom; + const uint8_t *texturePixels; + int textureWidth; + int textureHeight; + int solidcolor; +}; + +#endif