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SoftwareTransformCommon.cpp
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SoftwareTransformCommon.cpp
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// Copyright (c) 2013- PPSSPP Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include <algorithm>
#include <cmath>
#include "Common/CPUDetect.h"
#include "Common/Math/math_util.h"
#include "Common/GPU/OpenGL/GLFeatures.h"
#include "Core/Config.h"
#include "GPU/GPUState.h"
#include "GPU/Math3D.h"
#include "GPU/Common/FramebufferManagerCommon.h"
#include "GPU/Common/GPUStateUtils.h"
#include "GPU/Common/SoftwareTransformCommon.h"
#include "GPU/Common/TransformCommon.h"
#include "GPU/Common/TextureCacheCommon.h"
#include "GPU/Common/VertexDecoderCommon.h"
// This is the software transform pipeline, which is necessary for supporting RECT
// primitives correctly without geometry shaders, and may be easier to use for
// debugging than the hardware transform pipeline.
// There's code here that simply expands transformed RECTANGLES into plain triangles.
// We're gonna have to keep software transforming RECTANGLES, unless we use a geom shader which we can't on OpenGL ES 2.0 or DX9.
// Usually, though, these primitives don't use lighting etc so it's no biggie performance wise, but it would be nice to get rid of
// this code.
// Actually, if we find the camera-relative right and down vectors, it might even be possible to add the extra points in pre-transformed
// space and thus make decent use of hardware transform.
// Actually again, single quads could be drawn more efficiently using GL_TRIANGLE_STRIP, no need to duplicate verts as for
// GL_TRIANGLES. Still need to sw transform to compute the extra two corners though.
//
// The verts are in the order: BR BL TL TR
static void SwapUVs(TransformedVertex &a, TransformedVertex &b) {
float tempu = a.u;
float tempv = a.v;
a.u = b.u;
a.v = b.v;
b.u = tempu;
b.v = tempv;
}
// 2 3 3 2 0 3 2 1
// to to or
// 1 0 0 1 1 2 3 0
// Note: 0 is BR and 2 is TL.
static void RotateUV(TransformedVertex v[4], bool flippedY) {
// We use the transformed tl/br coordinates to figure out whether they're flipped or not.
float ySign = flippedY ? -1.0 : 1.0;
const float x1 = v[2].x;
const float x2 = v[0].x;
const float y1 = v[2].y * ySign;
const float y2 = v[0].y * ySign;
if ((x1 < x2 && y1 < y2) || (x1 > x2 && y1 > y2))
SwapUVs(v[1], v[3]);
}
static void RotateUVThrough(TransformedVertex v[4]) {
float x1 = v[2].x;
float x2 = v[0].x;
float y1 = v[2].y;
float y2 = v[0].y;
if ((x1 < x2 && y1 > y2) || (x1 > x2 && y1 < y2))
SwapUVs(v[1], v[3]);
}
// Clears on the PSP are best done by drawing a series of vertical strips
// in clear mode. This tries to detect that.
static bool IsReallyAClear(const TransformedVertex *transformed, int numVerts, float x2, float y2) {
if (transformed[0].x < 0.0f || transformed[0].y < 0.0f || transformed[0].x > 0.5f || transformed[0].y > 0.5f)
return false;
const float originY = transformed[0].y;
// Color and Z are decided by the second vertex, so only need to check those for matching color.
const u32 matchcolor = transformed[1].color0_32;
const float matchz = transformed[1].z;
for (int i = 1; i < numVerts; i++) {
if ((i & 1) == 0) {
// Top left of a rectangle
if (transformed[i].y != originY)
return false;
float gap = fabsf(transformed[i].x - transformed[i - 1].x); // Should probably do some smarter check.
if (i > 0 && gap > 0.0625)
return false;
} else {
if (transformed[i].color0_32 != matchcolor || transformed[i].z != matchz)
return false;
// Bottom right
if (transformed[i].y < y2)
return false;
if (transformed[i].x <= transformed[i - 1].x)
return false;
}
}
// The last vertical strip often extends outside the drawing area.
if (transformed[numVerts - 1].x < x2)
return false;
return true;
}
static int ColorIndexOffset(int prim, GEShadeMode shadeMode, bool clearMode) {
if (shadeMode != GE_SHADE_FLAT || clearMode) {
return 0;
}
switch (prim) {
case GE_PRIM_LINES:
case GE_PRIM_LINE_STRIP:
return 1;
case GE_PRIM_TRIANGLES:
case GE_PRIM_TRIANGLE_STRIP:
return 2;
case GE_PRIM_TRIANGLE_FAN:
return 1;
case GE_PRIM_RECTANGLES:
// We already use BR color when expanding, so no need to offset.
return 0;
default:
break;
}
return 0;
}
void SoftwareTransform::SetProjMatrix(const float mtx[14], bool invertedX, bool invertedY, const Lin::Vec3 &trans, const Lin::Vec3 &scale) {
memcpy(&projMatrix_.m, mtx, 16 * sizeof(float));
if (invertedY) {
projMatrix_.xy = -projMatrix_.xy;
projMatrix_.yy = -projMatrix_.yy;
projMatrix_.zy = -projMatrix_.zy;
projMatrix_.wy = -projMatrix_.wy;
}
if (invertedX) {
projMatrix_.xx = -projMatrix_.xx;
projMatrix_.yx = -projMatrix_.yx;
projMatrix_.zx = -projMatrix_.zx;
projMatrix_.wx = -projMatrix_.wx;
}
projMatrix_.translateAndScale(trans, scale);
}
void SoftwareTransform::Transform(int prim, u32 vertType, const DecVtxFormat &decVtxFormat, int maxIndex, SoftwareTransformResult *result) {
u8 *decoded = params_.decoded;
TransformedVertex *transformed = params_.transformed;
bool throughmode = (vertType & GE_VTYPE_THROUGH_MASK) != 0;
bool lmode = gstate.isUsingSecondaryColor() && gstate.isLightingEnabled();
float uscale = 1.0f;
float vscale = 1.0f;
if (throughmode && prim != GE_PRIM_RECTANGLES) {
// For through rectangles, we do this scaling in Expand.
uscale /= gstate_c.curTextureWidth;
vscale /= gstate_c.curTextureHeight;
}
const int w = gstate.getTextureWidth(0);
const int h = gstate.getTextureHeight(0);
float widthFactor = (float) w / (float) gstate_c.curTextureWidth;
float heightFactor = (float) h / (float) gstate_c.curTextureHeight;
Lighter lighter(vertType);
float fog_end = getFloat24(gstate.fog1);
float fog_slope = getFloat24(gstate.fog2);
// Same fixup as in ShaderManagerGLES.cpp
if (my_isnanorinf(fog_end)) {
// Not really sure what a sensible value might be, but let's try 64k.
fog_end = std::signbit(fog_end) ? -65535.0f : 65535.0f;
}
if (my_isnanorinf(fog_slope)) {
fog_slope = std::signbit(fog_slope) ? -65535.0f : 65535.0f;
}
int provokeIndOffset = 0;
if (params_.provokeFlatFirst) {
provokeIndOffset = ColorIndexOffset(prim, gstate.getShadeMode(), gstate.isModeClear());
}
VertexReader reader(decoded, decVtxFormat, vertType);
if (throughmode) {
const u32 materialAmbientRGBA = gstate.getMaterialAmbientRGBA();
const bool hasColor = reader.hasColor0();
const bool hasUV = reader.hasUV();
for (int index = 0; index < maxIndex; index++) {
// Do not touch the coordinates or the colors. No lighting.
reader.Goto(index);
// TODO: Write to a flexible buffer, we don't always need all four components.
TransformedVertex &vert = transformed[index];
reader.ReadPos(vert.pos);
vert.pos_w = 1.0f;
if (hasColor) {
if (provokeIndOffset != 0 && index + provokeIndOffset < maxIndex) {
reader.Goto(index + provokeIndOffset);
vert.color0_32 = reader.ReadColor0_8888();
reader.Goto(index);
} else {
vert.color0_32 = reader.ReadColor0_8888();
}
} else {
vert.color0_32 = materialAmbientRGBA;
}
if (hasUV) {
reader.ReadUV(vert.uv);
vert.u *= uscale;
vert.v *= vscale;
} else {
vert.u = 0.0f;
vert.v = 0.0f;
}
vert.uv_w = 1.0f;
// Ignore color1 and fog, never used in throughmode anyway.
// The w of uv is also never used (hardcoded to 1.0.)
}
} else {
const Vec4f materialAmbientRGBA = Vec4f::FromRGBA(gstate.getMaterialAmbientRGBA());
// Okay, need to actually perform the full transform.
for (int index = 0; index < maxIndex; index++) {
reader.Goto(index);
float v[3] = {0, 0, 0};
Vec4f c0 = Vec4f(1, 1, 1, 1);
Vec4f c1 = Vec4f(0, 0, 0, 0);
float uv[3] = {0, 0, 1};
float fogCoef = 1.0f;
float out[3];
float pos[3];
Vec3f normal(0, 0, 1);
Vec3f worldnormal(0, 0, 1);
reader.ReadPos(pos);
float ruv[2] = { 0.0f, 0.0f };
if (reader.hasUV())
reader.ReadUV(ruv);
// Read all the provoking vertex values here.
Vec4f unlitColor;
if (provokeIndOffset != 0 && index + provokeIndOffset < maxIndex)
reader.Goto(index + provokeIndOffset);
if (reader.hasColor0())
reader.ReadColor0(unlitColor.AsArray());
else
unlitColor = materialAmbientRGBA;
if (reader.hasNormal())
reader.ReadNrm(normal.AsArray());
Vec3ByMatrix43(out, pos, gstate.worldMatrix);
if (reader.hasNormal()) {
if (gstate.areNormalsReversed()) {
normal = -normal;
}
Norm3ByMatrix43(worldnormal.AsArray(), normal.AsArray(), gstate.worldMatrix);
worldnormal = worldnormal.NormalizedOr001(cpu_info.bSSE4_1);
}
// Perform lighting here if enabled.
if (gstate.isLightingEnabled()) {
float litColor0[4];
float litColor1[4];
lighter.Light(litColor0, litColor1, unlitColor.AsArray(), out, worldnormal);
// Don't ignore gstate.lmode - we should send two colors in that case
for (int j = 0; j < 4; j++) {
c0[j] = litColor0[j];
}
if (lmode) {
// Separate colors
for (int j = 0; j < 4; j++) {
c1[j] = litColor1[j];
}
} else {
// Summed color into c0 (will clamp in ToRGBA().)
for (int j = 0; j < 4; j++) {
c0[j] += litColor1[j];
}
}
} else {
for (int j = 0; j < 4; j++) {
c0[j] = unlitColor[j];
}
if (lmode) {
// c1 is already 0.
}
}
// Perform texture coordinate generation after the transform and lighting - one style of UV depends on lights.
switch (gstate.getUVGenMode()) {
case GE_TEXMAP_TEXTURE_COORDS: // UV mapping
case GE_TEXMAP_UNKNOWN: // Seen in Riviera. Unsure of meaning, but this works.
// We always prescale in the vertex decoder now.
uv[0] = ruv[0];
uv[1] = ruv[1];
uv[2] = 1.0f;
break;
case GE_TEXMAP_TEXTURE_MATRIX:
{
// Projection mapping
Vec3f source(0.0f, 0.0f, 1.0f);
switch (gstate.getUVProjMode()) {
case GE_PROJMAP_POSITION: // Use model space XYZ as source
source = pos;
break;
case GE_PROJMAP_UV: // Use unscaled UV as source
source = Vec3f(ruv[0], ruv[1], 0.0f);
break;
case GE_PROJMAP_NORMALIZED_NORMAL: // Use normalized normal as source
// Flat uses the vertex normal, not provoking.
if (provokeIndOffset == 0) {
source = normal.Normalized(cpu_info.bSSE4_1);
} else {
reader.Goto(index);
if (reader.hasNormal())
reader.ReadNrm(source.AsArray());
if (gstate.areNormalsReversed())
source = -source;
source.Normalize();
}
if (!reader.hasNormal()) {
ERROR_LOG_REPORT(G3D, "Normal projection mapping without normal?");
}
break;
case GE_PROJMAP_NORMAL: // Use non-normalized normal as source!
// Flat uses the vertex normal, not provoking.
if (provokeIndOffset == 0) {
source = normal;
} else {
// Need to read the normal for this vertex and weight it again..
reader.Goto(index);
if (reader.hasNormal())
reader.ReadNrm(source.AsArray());
if (gstate.areNormalsReversed())
source = -source;
}
if (!reader.hasNormal()) {
ERROR_LOG_REPORT(G3D, "Normal projection mapping without normal?");
}
break;
}
float uvw[3];
Vec3ByMatrix43(uvw, &source.x, gstate.tgenMatrix);
uv[0] = uvw[0];
uv[1] = uvw[1];
uv[2] = uvw[2];
}
break;
case GE_TEXMAP_ENVIRONMENT_MAP:
// Shade mapping - use two light sources to generate U and V.
{
auto getLPosFloat = [&](int l, int i) {
return getFloat24(gstate.lpos[l * 3 + i]);
};
auto getLPos = [&](int l) {
return Vec3f(getLPosFloat(l, 0), getLPosFloat(l, 1), getLPosFloat(l, 2));
};
auto calcShadingLPos = [&](int l) {
Vec3f pos = getLPos(l);
return pos.NormalizedOr001(cpu_info.bSSE4_1);
};
// Might not have lighting enabled, so don't use lighter.
Vec3f lightpos0 = calcShadingLPos(gstate.getUVLS0());
Vec3f lightpos1 = calcShadingLPos(gstate.getUVLS1());
uv[0] = (1.0f + Dot(lightpos0, worldnormal))/2.0f;
uv[1] = (1.0f + Dot(lightpos1, worldnormal))/2.0f;
uv[2] = 1.0f;
}
break;
default:
// Illegal
ERROR_LOG_REPORT(G3D, "Impossible UV gen mode? %d", gstate.getUVGenMode());
break;
}
uv[0] = uv[0] * widthFactor;
uv[1] = uv[1] * heightFactor;
// Transform the coord by the view matrix.
Vec3ByMatrix43(v, out, gstate.viewMatrix);
fogCoef = (v[2] + fog_end) * fog_slope;
// TODO: Write to a flexible buffer, we don't always need all four components.
Vec3ByMatrix44(transformed[index].pos, v, projMatrix_.m);
transformed[index].fog = fogCoef;
memcpy(&transformed[index].uv, uv, 3 * sizeof(float));
transformed[index].color0_32 = c0.ToRGBA();
transformed[index].color1_32 = c1.ToRGBA();
// Vertex depth rounding is done in the shader, to simulate the 16-bit depth buffer.
}
}
// Here's the best opportunity to try to detect rectangles used to clear the screen, and
// replace them with real clears. This can provide a speedup on certain mobile chips.
//
// An alternative option is to simply ditch all the verts except the first and last to create a single
// rectangle out of many. Quite a small optimization though.
// TODO: This bleeds outside the play area in non-buffered mode. Big deal? Probably not.
// TODO: Allow creating a depth clear and a color draw.
bool reallyAClear = false;
if (maxIndex > 1 && prim == GE_PRIM_RECTANGLES && gstate.isModeClear() && throughmode) {
int scissorX2 = gstate.getScissorX2() + 1;
int scissorY2 = gstate.getScissorY2() + 1;
reallyAClear = IsReallyAClear(transformed, maxIndex, scissorX2, scissorY2);
if (reallyAClear && gstate.getColorMask() != 0xFFFFFFFF && (gstate.isClearModeColorMask() || gstate.isClearModeAlphaMask())) {
result->setSafeSize = true;
result->safeWidth = scissorX2;
result->safeHeight = scissorY2;
}
}
if (params_.allowClear && reallyAClear && gl_extensions.gpuVendor != GPU_VENDOR_IMGTEC) {
// If alpha is not allowed to be separate, it must match for both depth/stencil and color. Vulkan requires this.
bool alphaMatchesColor = gstate.isClearModeColorMask() == gstate.isClearModeAlphaMask();
bool depthMatchesStencil = gstate.isClearModeAlphaMask() == gstate.isClearModeDepthMask();
bool matchingComponents = params_.allowSeparateAlphaClear || (alphaMatchesColor && depthMatchesStencil);
bool stencilNotMasked = !gstate.isClearModeAlphaMask() || gstate.getStencilWriteMask() == 0x00;
if (matchingComponents && stencilNotMasked) {
DepthScaleFactors depthScale = GetDepthScaleFactors(gstate_c.UseFlags());
result->color = transformed[1].color0_32;
// Need to rescale from a [0, 1] float. This is the final transformed value.
result->depth = depthScale.EncodeFromU16((float)(int)(transformed[1].z * 65535.0f));
result->action = SW_CLEAR;
gpuStats.numClears++;
return;
}
}
// Detect full screen "clears" that might not be so obvious, to set the safe size if possible.
if (!result->setSafeSize && prim == GE_PRIM_RECTANGLES && maxIndex == 2 && throughmode) {
bool clearingColor = gstate.isModeClear() && (gstate.isClearModeColorMask() || gstate.isClearModeAlphaMask());
bool writingColor = gstate.getColorMask() != 0xFFFFFFFF;
bool startsZeroX = transformed[0].x <= 0.0f && transformed[1].x > 0.0f && transformed[1].x > transformed[0].x;
bool startsZeroY = transformed[0].y <= 0.0f && transformed[1].y > 0.0f && transformed[1].y > transformed[0].y;
if (startsZeroX && startsZeroY && (clearingColor || writingColor)) {
int scissorX2 = gstate.getScissorX2() + 1;
int scissorY2 = gstate.getScissorY2() + 1;
result->setSafeSize = true;
result->safeWidth = std::min(scissorX2, (int)transformed[1].x);
result->safeHeight = std::min(scissorY2, (int)transformed[1].y);
}
}
}
// NOTE: The viewport must be up to date!
void SoftwareTransform::BuildDrawingParams(int prim, int vertexCount, u32 vertType, u16 *&inds, int &maxIndex, SoftwareTransformResult *result) {
TransformedVertex *transformed = params_.transformed;
TransformedVertex *transformedExpanded = params_.transformedExpanded;
bool throughmode = (vertType & GE_VTYPE_THROUGH_MASK) != 0;
// Step 2: expand and process primitives.
result->drawBuffer = transformed;
int numTrans = 0;
FramebufferManagerCommon *fbman = params_.fbman;
bool useBufferedRendering = fbman->UseBufferedRendering();
if (prim == GE_PRIM_RECTANGLES) {
ExpandRectangles(vertexCount, maxIndex, inds, transformed, transformedExpanded, numTrans, throughmode);
result->drawBuffer = transformedExpanded;
result->drawIndexed = true;
// We don't know the color until here, so we have to do it now, instead of in StateMapping.
// Might want to reconsider the order of things later...
if (gstate.isModeClear() && gstate.isClearModeAlphaMask()) {
result->setStencil = true;
if (vertexCount > 1) {
// Take the bottom right alpha value of the first rect as the stencil value.
// Technically, each rect could individually fill its stencil, but most of the
// time they use the same one.
result->stencilValue = transformed[inds[1]].color0[3];
} else {
result->stencilValue = 0;
}
}
} else if (prim == GE_PRIM_POINTS) {
ExpandPoints(vertexCount, maxIndex, inds, transformed, transformedExpanded, numTrans, throughmode);
result->drawBuffer = transformedExpanded;
result->drawIndexed = true;
} else if (prim == GE_PRIM_LINES) {
ExpandLines(vertexCount, maxIndex, inds, transformed, transformedExpanded, numTrans, throughmode);
result->drawBuffer = transformedExpanded;
result->drawIndexed = true;
} else {
// We can simply draw the unexpanded buffer.
numTrans = vertexCount;
result->drawIndexed = true;
// If we don't support custom cull in the shader, process it here.
if (!gstate_c.Use(GPU_USE_CULL_DISTANCE) && vertexCount > 0 && !throughmode) {
const u16 *indsIn = (const u16 *)inds;
u16 *newInds = inds + vertexCount;
u16 *indsOut = newInds;
float minZValue, maxZValue;
CalcCullParams(minZValue, maxZValue);
std::vector<int> outsideZ;
outsideZ.resize(vertexCount);
// First, check inside/outside directions for each index.
for (int i = 0; i < vertexCount; ++i) {
float z = transformed[indsIn[i]].z / transformed[indsIn[i]].pos_w;
if (z > maxZValue)
outsideZ[i] = 1;
else if (z < minZValue)
outsideZ[i] = -1;
else
outsideZ[i] = 0;
}
// Now, for each primitive type, throw away the indices if:
// - Depth clamp on, and ALL verts are outside *in the same direction*.
// - Depth clamp off, and ANY vert is outside.
if (prim == GE_PRIM_TRIANGLES && gstate.isDepthClampEnabled()) {
numTrans = 0;
for (int i = 0; i < vertexCount - 2; i += 3) {
if (outsideZ[i + 0] != 0 && outsideZ[i + 0] == outsideZ[i + 1] && outsideZ[i + 0] == outsideZ[i + 2]) {
// All outside, and all the same direction. Nuke this triangle.
continue;
}
memcpy(indsOut, indsIn + i, 3 * sizeof(uint16_t));
indsOut += 3;
numTrans += 3;
}
inds = newInds;
} else if (prim == GE_PRIM_TRIANGLES) {
numTrans = 0;
for (int i = 0; i < vertexCount - 2; i += 3) {
if (outsideZ[i + 0] != 0 || outsideZ[i + 1] != 0 || outsideZ[i + 2] != 0) {
// Even one outside, and we cull.
continue;
}
memcpy(indsOut, indsIn + i, 3 * sizeof(uint16_t));
indsOut += 3;
numTrans += 3;
}
inds = newInds;
}
}
}
if (gstate.isModeClear()) {
gpuStats.numClears++;
}
result->action = SW_DRAW_PRIMITIVES;
result->drawNumTrans = numTrans;
}
void SoftwareTransform::CalcCullParams(float &minZValue, float &maxZValue) {
// The projected Z can be up to 0x3F8000FF, which is where this constant is from.
// It seems like it may only maintain 15 mantissa bits (excluding implied.)
maxZValue = 1.000030517578125f * gstate_c.vpDepthScale;
minZValue = -maxZValue;
// Scale and offset the Z appropriately, since we baked that into a projection transform.
if (params_.usesHalfZ) {
maxZValue = maxZValue * 0.5f + 0.5f + gstate_c.vpZOffset * 0.5f;
minZValue = minZValue * 0.5f + 0.5f + gstate_c.vpZOffset * 0.5f;
} else {
maxZValue += gstate_c.vpZOffset;
minZValue += gstate_c.vpZOffset;
}
// In case scale was negative, flip.
if (minZValue > maxZValue)
std::swap(minZValue, maxZValue);
}
void SoftwareTransform::ExpandRectangles(int vertexCount, int &maxIndex, u16 *&inds, const TransformedVertex *transformed, TransformedVertex *transformedExpanded, int &numTrans, bool throughmode) {
// Rectangles always need 2 vertices, disregard the last one if there's an odd number.
vertexCount = vertexCount & ~1;
numTrans = 0;
TransformedVertex *trans = &transformedExpanded[0];
const u16 *indsIn = (const u16 *)inds;
u16 *newInds = inds + vertexCount;
u16 *indsOut = newInds;
maxIndex = 4 * (vertexCount / 2);
float uscale = 1.0f;
float vscale = 1.0f;
if (throughmode) {
uscale /= gstate_c.curTextureWidth;
vscale /= gstate_c.curTextureHeight;
}
for (int i = 0; i < vertexCount; i += 2) {
const TransformedVertex &transVtxTL = transformed[indsIn[i + 0]];
const TransformedVertex &transVtxBR = transformed[indsIn[i + 1]];
// We have to turn the rectangle into two triangles, so 6 points.
// This is 4 verts + 6 indices.
// bottom right
trans[0] = transVtxBR;
trans[0].u = transVtxBR.u * uscale;
trans[0].v = transVtxBR.v * vscale;
// top right
trans[1] = transVtxBR;
trans[1].y = transVtxTL.y;
trans[1].u = transVtxBR.u * uscale;
trans[1].v = transVtxTL.v * vscale;
// top left
trans[2] = transVtxBR;
trans[2].x = transVtxTL.x;
trans[2].y = transVtxTL.y;
trans[2].u = transVtxTL.u * uscale;
trans[2].v = transVtxTL.v * vscale;
// bottom left
trans[3] = transVtxBR;
trans[3].x = transVtxTL.x;
trans[3].u = transVtxTL.u * uscale;
trans[3].v = transVtxBR.v * vscale;
// That's the four corners. Now process UV rotation.
if (throughmode) {
RotateUVThrough(trans);
} else {
RotateUV(trans, params_.flippedY);
}
// Triangle: BR-TR-TL
indsOut[0] = i * 2 + 0;
indsOut[1] = i * 2 + 1;
indsOut[2] = i * 2 + 2;
// Triangle: BL-BR-TL
indsOut[3] = i * 2 + 3;
indsOut[4] = i * 2 + 0;
indsOut[5] = i * 2 + 2;
trans += 4;
indsOut += 6;
numTrans += 6;
}
inds = newInds;
}
void SoftwareTransform::ExpandLines(int vertexCount, int &maxIndex, u16 *&inds, const TransformedVertex *transformed, TransformedVertex *transformedExpanded, int &numTrans, bool throughmode) {
// Lines always need 2 vertices, disregard the last one if there's an odd number.
vertexCount = vertexCount & ~1;
numTrans = 0;
TransformedVertex *trans = &transformedExpanded[0];
const u16 *indsIn = (const u16 *)inds;
u16 *newInds = inds + vertexCount;
u16 *indsOut = newInds;
float dx = 1.0f * gstate_c.vpWidthScale * (1.0f / fabsf(gstate.getViewportXScale()));
float dy = 1.0f * gstate_c.vpHeightScale * (1.0f / fabsf(gstate.getViewportYScale()));
float du = 1.0f / gstate_c.curTextureWidth;
float dv = 1.0f / gstate_c.curTextureHeight;
if (throughmode) {
dx = 1.0f;
dy = 1.0f;
}
maxIndex = 4 * (vertexCount / 2);
if (PSP_CoreParameter().compat.flags().CenteredLines) {
// Lines meant to be pretty in 3D like in Echochrome.
// We expand them in both directions for symmetry, so we need to halve the expansion.
dx *= 0.5f;
dy *= 0.5f;
for (int i = 0; i < vertexCount; i += 2) {
const TransformedVertex &transVtx1 = transformed[indsIn[i + 0]];
const TransformedVertex &transVtx2 = transformed[indsIn[i + 1]];
// Okay, let's calculate the perpendicular.
float horizontal = transVtx2.x * transVtx2.pos_w - transVtx1.x * transVtx1.pos_w;
float vertical = transVtx2.y * transVtx2.pos_w - transVtx1.y * transVtx1.pos_w;
Vec2f addWidth = Vec2f(-vertical, horizontal).Normalized();
float xoff = addWidth.x * dx;
float yoff = addWidth.y * dy;
// bottom right
trans[0].CopyFromWithOffset(transVtx2, xoff * transVtx2.pos_w, yoff * transVtx2.pos_w);
// top right
trans[1].CopyFromWithOffset(transVtx1, xoff * transVtx1.pos_w, yoff * transVtx1.pos_w);
// top left
trans[2].CopyFromWithOffset(transVtx1, -xoff * transVtx1.pos_w, -yoff * transVtx1.pos_w);
// bottom left
trans[3].CopyFromWithOffset(transVtx2, -xoff * transVtx2.pos_w, -yoff * transVtx2.pos_w);
// Triangle: BR-TR-TL
indsOut[0] = i * 2 + 0;
indsOut[1] = i * 2 + 1;
indsOut[2] = i * 2 + 2;
// Triangle: BL-BR-TL
indsOut[3] = i * 2 + 3;
indsOut[4] = i * 2 + 0;
indsOut[5] = i * 2 + 2;
trans += 4;
indsOut += 6;
numTrans += 6;
}
} else {
// Lines meant to be as closely compatible with upscaled 2D drawing as possible.
// We use this as default.
for (int i = 0; i < vertexCount; i += 2) {
const TransformedVertex &transVtx1 = transformed[indsIn[i + 0]];
const TransformedVertex &transVtx2 = transformed[indsIn[i + 1]];
const TransformedVertex &transVtxT = transVtx1.y <= transVtx2.y ? transVtx1 : transVtx2;
const TransformedVertex &transVtxB = transVtx1.y <= transVtx2.y ? transVtx2 : transVtx1;
const TransformedVertex &transVtxL = transVtx1.x <= transVtx2.x ? transVtx1 : transVtx2;
const TransformedVertex &transVtxR = transVtx1.x <= transVtx2.x ? transVtx2 : transVtx1;
// Sort the points so our perpendicular will bias the right direction.
const TransformedVertex &transVtxTL = (transVtxT.y != transVtxB.y || transVtxT.x > transVtxB.x) ? transVtxT : transVtxB;
const TransformedVertex &transVtxBL = (transVtxT.y != transVtxB.y || transVtxT.x > transVtxB.x) ? transVtxB : transVtxT;
// Okay, let's calculate the perpendicular.
float horizontal = transVtxTL.x * transVtxTL.pos_w - transVtxBL.x * transVtxBL.pos_w;
float vertical = transVtxTL.y * transVtxTL.pos_w - transVtxBL.y * transVtxBL.pos_w;
Vec2f addWidth = Vec2f(-vertical, horizontal).Normalized();
// bottom right
trans[0] = transVtxBL;
trans[0].x += addWidth.x * dx * trans[0].pos_w;
trans[0].y += addWidth.y * dy * trans[0].pos_w;
trans[0].u += addWidth.x * du * trans[0].uv_w;
trans[0].v += addWidth.y * dv * trans[0].uv_w;
// top right
trans[1] = transVtxTL;
trans[1].x += addWidth.x * dx * trans[1].pos_w;
trans[1].y += addWidth.y * dy * trans[1].pos_w;
trans[1].u += addWidth.x * du * trans[1].uv_w;
trans[1].v += addWidth.y * dv * trans[1].uv_w;
// top left
trans[2] = transVtxTL;
// bottom left
trans[3] = transVtxBL;
// Triangle: BR-TR-TL
indsOut[0] = i * 2 + 0;
indsOut[1] = i * 2 + 1;
indsOut[2] = i * 2 + 2;
// Triangle: BL-BR-TL
indsOut[3] = i * 2 + 3;
indsOut[4] = i * 2 + 0;
indsOut[5] = i * 2 + 2;
trans += 4;
indsOut += 6;
numTrans += 6;
}
}
inds = newInds;
}
void SoftwareTransform::ExpandPoints(int vertexCount, int &maxIndex, u16 *&inds, const TransformedVertex *transformed, TransformedVertex *transformedExpanded, int &numTrans, bool throughmode) {
numTrans = 0;
TransformedVertex *trans = &transformedExpanded[0];
const u16 *indsIn = (const u16 *)inds;
u16 *newInds = inds + vertexCount;
u16 *indsOut = newInds;
float dx = 1.0f * gstate_c.vpWidthScale * (1.0f / gstate.getViewportXScale());
float dy = 1.0f * gstate_c.vpHeightScale * (1.0f / gstate.getViewportYScale());
float du = 1.0f / gstate_c.curTextureWidth;
float dv = 1.0f / gstate_c.curTextureHeight;
if (throughmode) {
dx = 1.0f;
dy = 1.0f;
}
maxIndex = 4 * vertexCount;
for (int i = 0; i < vertexCount; ++i) {
const TransformedVertex &transVtxTL = transformed[indsIn[i]];
// Create the bottom right version.
TransformedVertex transVtxBR = transVtxTL;
transVtxBR.x += dx * transVtxTL.pos_w;
transVtxBR.y += dy * transVtxTL.pos_w;
transVtxBR.u += du * transVtxTL.uv_w;
transVtxBR.v += dv * transVtxTL.uv_w;
// We have to turn the rectangle into two triangles, so 6 points.
// This is 4 verts + 6 indices.
// bottom right
trans[0] = transVtxBR;
// top right
trans[1] = transVtxBR;
trans[1].y = transVtxTL.y;
trans[1].v = transVtxTL.v;
// top left
trans[2] = transVtxBR;
trans[2].x = transVtxTL.x;
trans[2].y = transVtxTL.y;
trans[2].u = transVtxTL.u;
trans[2].v = transVtxTL.v;
// bottom left
trans[3] = transVtxBR;
trans[3].x = transVtxTL.x;
trans[3].u = transVtxTL.u;
// Triangle: BR-TR-TL
indsOut[0] = i * 4 + 0;
indsOut[1] = i * 4 + 1;
indsOut[2] = i * 4 + 2;
// Triangle: BL-BR-TL
indsOut[3] = i * 4 + 3;
indsOut[4] = i * 4 + 0;
indsOut[5] = i * 4 + 2;
trans += 4;
indsOut += 6;
numTrans += 6;
}
inds = newInds;
}