🚚 Move CEL rendering to engine/render/cel_render.cpp
This commit is contained in:
Gleb Mazovetskiy
Anders Jenbo
parent
473d1b0b14
commit
0edfa3de66
17 changed files with 684 additions and 628 deletions
475
Source/engine/render/cel_render.cpp
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475
Source/engine/render/cel_render.cpp
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#include "engine/render/cel_render.hpp"
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#include <cstddef>
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#include <cstdint>
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#include <cstring>
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#include "engine/render/common_impl.h"
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#include "options.h"
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#include "palette.h"
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#include "scrollrt.h"
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namespace devilution {
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namespace {
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constexpr bool IsCelTransparent(std::uint8_t control)
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{
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constexpr std::uint8_t CelTransparentMin = 0x80;
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return control >= CelTransparentMin;
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}
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constexpr std::uint8_t GetCelTransparentWidth(std::uint8_t control)
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{
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return -static_cast<std::int8_t>(control);
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}
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const byte *SkipRestOfCelLine(const byte *src, std::int_fast16_t remainingWidth)
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{
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while (remainingWidth > 0) {
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const auto v = static_cast<std::int8_t>(*src++);
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if (!IsCelTransparent(v)) {
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src += v;
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remainingWidth -= v;
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} else {
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remainingWidth += v;
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}
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}
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return src;
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}
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/** Renders a CEL with only vertical clipping to the output buffer. */
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template <typename RenderLine>
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void RenderCelClipY(const CelOutputBuffer &out, Point position, const byte *src, std::size_t srcSize, std::size_t srcWidth, const RenderLine &renderLine)
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{
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const auto *srcEnd = src + srcSize;
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// Skip the bottom clipped lines.
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const auto dstHeight = out.h();
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while (position.y >= dstHeight && src != srcEnd) {
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src = SkipRestOfCelLine(src, static_cast<std::int_fast16_t>(srcWidth));
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--position.y;
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}
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auto *dst = &out[position];
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const auto *dstBegin = out.begin();
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const auto dstPitch = out.pitch();
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while (src != srcEnd && dst >= dstBegin) {
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for (std::size_t remainingWidth = srcWidth; remainingWidth > 0;) {
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auto v = static_cast<std::uint8_t>(*src++);
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if (!IsCelTransparent(v)) {
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renderLine(dst, reinterpret_cast<const std::uint8_t *>(src), v);
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src += v;
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} else {
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v = GetCelTransparentWidth(v);
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}
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dst += v;
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remainingWidth -= v;
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}
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dst -= dstPitch + srcWidth;
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}
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}
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/** Renders a CEL with both horizontal and vertical clipping to the output buffer. */
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template <typename RenderLine>
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void RenderCelClipXY(const CelOutputBuffer &out, Point position, const byte *src, std::size_t srcSize, std::size_t srcWidth, ClipX clipX, const RenderLine &renderLine)
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{
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const auto *srcEnd = src + srcSize;
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// Skip the bottom clipped lines.
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const auto dstHeight = out.h();
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while (position.y >= dstHeight && src != srcEnd) {
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src = SkipRestOfCelLine(src, static_cast<std::int_fast16_t>(srcWidth));
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--position.y;
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}
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position.x += static_cast<int>(clipX.left);
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auto *dst = &out[position];
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const auto *dstBegin = out.begin();
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const auto dstPitch = out.pitch();
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while (src < srcEnd && dst >= dstBegin) {
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// Skip initial src if clipping on the left.
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// Handles overshoot, i.e. when the RLE segment goes into the unclipped area.
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auto remainingWidth = clipX.width;
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auto remainingLeftClip = clipX.left;
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while (remainingLeftClip > 0) {
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auto v = static_cast<std::uint8_t>(*src++);
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if (!IsCelTransparent(v)) {
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if (v > remainingLeftClip) {
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const auto overshoot = v - remainingLeftClip;
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renderLine(dst, reinterpret_cast<const std::uint8_t *>(src + remainingLeftClip), overshoot);
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dst += overshoot;
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remainingWidth -= overshoot;
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}
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src += v;
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} else {
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v = GetCelTransparentWidth(v);
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if (v > remainingLeftClip) {
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const auto overshoot = v - remainingLeftClip;
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dst += overshoot;
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remainingWidth -= overshoot;
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}
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}
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remainingLeftClip -= v;
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}
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// Draw the non-clipped segment
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while (remainingWidth > 0) {
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auto v = static_cast<std::uint8_t>(*src++);
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if (!IsCelTransparent(v)) {
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if (v > remainingWidth) {
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renderLine(dst, reinterpret_cast<const std::uint8_t *>(src), remainingWidth);
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src += v;
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dst += remainingWidth;
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remainingWidth -= v;
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break;
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}
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renderLine(dst, reinterpret_cast<const std::uint8_t *>(src), v);
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src += v;
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} else {
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v = GetCelTransparentWidth(v);
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if (v > remainingWidth) {
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dst += remainingWidth;
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remainingWidth -= v;
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break;
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}
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}
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dst += v;
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remainingWidth -= v;
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}
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// Skip the rest of src line if clipping on the right
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assert(remainingWidth <= 0);
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src = SkipRestOfCelLine(src, clipX.right + remainingWidth);
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dst -= dstPitch + clipX.width;
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}
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}
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template <typename RenderLine>
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void RenderCel(const CelOutputBuffer &out, Point position, const byte *src, std::size_t srcSize, std::size_t srcWidth, const RenderLine &renderLine)
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{
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const ClipX clipX = CalculateClipX(position.x, srcWidth, out);
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if (clipX.width <= 0)
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return;
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if (static_cast<std::size_t>(clipX.width) == srcWidth) {
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RenderCelClipY(out, position, src, srcSize, srcWidth, renderLine);
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} else {
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RenderCelClipXY(out, position, src, srcSize, srcWidth, clipX, renderLine);
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}
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}
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void RenderCelWithLightTable(const CelOutputBuffer &out, Point position, const byte *src, std::size_t srcSize, std::size_t srcWidth, const std::uint8_t *tbl)
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{
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RenderCel(out, position, src, srcSize, srcWidth, [tbl](std::uint8_t *dst, const std::uint8_t *src, std::size_t w) {
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while (w-- > 0) {
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*dst++ = tbl[static_cast<std::uint8_t>(*src)];
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++src;
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}
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});
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}
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constexpr auto RenderLineMemcpy = [](std::uint8_t *dst, const std::uint8_t *src, std::size_t w) {
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std::memcpy(dst, src, w);
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};
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} // namespace
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void CelDrawTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrame(cel.Data(), frame, &nDataSize);
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CelBlitSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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}
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void CelClippedDrawTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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CelBlitSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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}
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void CelDrawLightTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame, uint8_t *tbl)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrame(cel.Data(), frame, &nDataSize);
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if (light_table_index != 0 || tbl != nullptr)
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CelBlitLightSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame), tbl);
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else
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CelBlitSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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}
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void CelClippedDrawLightTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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if (light_table_index != 0)
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CelBlitLightSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame), nullptr);
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else
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CelBlitSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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}
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void CelDrawLightRedTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame, char light)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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const std::uint8_t *tbl = GetLightTable(light);
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RenderCelWithLightTable(out, { sx, sy }, pRLEBytes, nDataSize, cel.Width(frame), tbl);
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}
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void CelBlitSafeTo(const CelOutputBuffer &out, int sx, int sy, const byte *pRLEBytes, int nDataSize, int nWidth)
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{
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assert(pRLEBytes != nullptr);
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RenderCel(out, { sx, sy }, pRLEBytes, nDataSize, nWidth, RenderLineMemcpy);
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}
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void CelClippedDrawSafeTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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CelBlitSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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}
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void CelBlitLightSafeTo(const CelOutputBuffer &out, int sx, int sy, const byte *pRLEBytes, int nDataSize, int nWidth, uint8_t *tbl)
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{
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assert(pRLEBytes != nullptr);
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if (tbl == nullptr)
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tbl = &pLightTbl[light_table_index * 256];
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RenderCelWithLightTable(out, { sx, sy }, pRLEBytes, nDataSize, nWidth, tbl);
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}
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void CelBlitLightTransSafeTo(const CelOutputBuffer &out, int sx, int sy, const byte *pRLEBytes, int nDataSize, int nWidth)
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{
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assert(pRLEBytes != nullptr);
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const auto *src = pRLEBytes;
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BYTE *dst = out.at(sx, sy);
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const uint8_t *tbl = &pLightTbl[light_table_index * 256];
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bool shift = (reinterpret_cast<uintptr_t>(dst) % 2) != 0;
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for (; src != &pRLEBytes[nDataSize]; dst -= out.pitch() + nWidth, shift = !shift) {
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for (int w = nWidth; w > 0;) {
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auto width = static_cast<std::uint8_t>(*src++);
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if (!IsCelTransparent(width)) {
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w -= width;
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if (dst < out.end() && dst > out.begin()) {
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if (((size_t)dst % 2) == shift) {
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if ((width & 1) == 0) {
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goto L_ODD;
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} else {
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src++;
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dst++;
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L_EVEN:
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width /= 2;
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if ((width & 1) != 0) {
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dst[0] = tbl[static_cast<std::uint8_t>(src[0])];
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src += 2;
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dst += 2;
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}
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width /= 2;
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for (; width > 0; width--) {
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dst[0] = tbl[static_cast<std::uint8_t>(src[0])];
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dst[2] = tbl[static_cast<std::uint8_t>(src[2])];
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src += 4;
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dst += 4;
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}
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}
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} else {
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if ((width & 1) == 0) {
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goto L_EVEN;
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} else {
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dst[0] = tbl[static_cast<std::uint8_t>(src[0])];
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src++;
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dst++;
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L_ODD:
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width /= 2;
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if ((width & 1) != 0) {
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dst[1] = tbl[static_cast<std::uint8_t>(src[1])];
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src += 2;
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dst += 2;
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}
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width /= 2;
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for (; width > 0; width--) {
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dst[1] = tbl[static_cast<std::uint8_t>(src[1])];
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dst[3] = tbl[static_cast<std::uint8_t>(src[3])];
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src += 4;
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dst += 4;
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}
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}
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}
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} else {
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src += width;
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dst += width;
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}
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} else {
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width = -static_cast<std::int8_t>(width);
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dst += width;
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w -= width;
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}
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}
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}
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}
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/**
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* @brief Same as CelBlitLightSafe, with blended transparancy applied
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* @param out The output buffer
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* @param pRLEBytes CEL pixel stream (run-length encoded)
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* @param nDataSize Size of CEL in bytes
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* @param nWidth Width of sprite
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* @param tbl Palette translation table
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*/
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static void CelBlitLightBlendedSafeTo(const CelOutputBuffer &out, int sx, int sy, const byte *pRLEBytes, int nDataSize, int nWidth, uint8_t *tbl)
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{
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assert(pRLEBytes != nullptr);
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if (tbl == nullptr)
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tbl = &pLightTbl[light_table_index * 256];
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RenderCel(out, { sx, sy }, pRLEBytes, nDataSize, nWidth, [tbl](std::uint8_t *dst, const uint8_t *src, std::size_t w) {
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while (w-- > 0) {
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*dst = paletteTransparencyLookup[*dst][tbl[*src++]];
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++dst;
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}
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});
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}
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void CelClippedBlitLightTransTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame)
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{
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int nDataSize;
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const byte *pRLEBytes = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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if (cel_transparency_active) {
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if (sgOptions.Graphics.bBlendedTransparancy)
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CelBlitLightBlendedSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame), nullptr);
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else
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CelBlitLightTransSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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} else if (light_table_index != 0)
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CelBlitLightSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame), nullptr);
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else
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CelBlitSafeTo(out, sx, sy, pRLEBytes, nDataSize, cel.Width(frame));
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}
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void CelDrawLightRedSafeTo(const CelOutputBuffer &out, int sx, int sy, const CelSprite &cel, int frame, char light)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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RenderCelWithLightTable(out, { sx, sy }, pRLEBytes, nDataSize, cel.Width(frame), GetLightTable(light));
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}
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void CelDrawUnsafeTo(const CelOutputBuffer &out, int x, int y, const CelSprite &cel, int frame)
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{
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int nDataSize;
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const auto *pRLEBytes = CelGetFrame(cel.Data(), frame, &nDataSize);
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RenderCelClipY(out, { x, y }, pRLEBytes, nDataSize, cel.Width(frame), RenderLineMemcpy);
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}
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void CelBlitOutlineTo(const CelOutputBuffer &out, uint8_t col, int sx, int sy, const CelSprite &cel, int frame, bool skipColorIndexZero)
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{
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int nDataSize;
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const byte *src = CelGetFrameClipped(cel.Data(), frame, &nDataSize);
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const auto *end = &src[nDataSize];
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uint8_t *dst = out.at(sx, sy);
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const int celWidth = static_cast<int>(cel.Width(frame));
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for (; src != end; dst -= out.pitch() + celWidth) {
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for (int w = celWidth; w > 0;) {
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auto width = static_cast<std::uint8_t>(*src++);
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if (!IsCelTransparent(width)) {
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w -= width;
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if (dst < out.end() && dst > out.begin()) {
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if (dst >= out.end() - out.pitch()) {
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while (width > 0) {
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if (!skipColorIndexZero || static_cast<std::uint8_t>(*src) > 0) {
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dst[-out.pitch()] = col;
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dst[-1] = col;
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dst[1] = col;
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}
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src++;
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dst++;
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width--;
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}
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} else {
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while (width > 0) {
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if (!skipColorIndexZero || static_cast<std::uint8_t>(*src) > 0) {
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dst[-out.pitch()] = col;
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dst[-1] = col;
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dst[1] = col;
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dst[out.pitch()] = col;
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}
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src++;
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dst++;
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width--;
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}
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}
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} else {
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src += width;
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dst += width;
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}
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} else {
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width = GetCelTransparentWidth(width);
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dst += width;
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w -= width;
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}
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}
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}
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}
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std::pair<int, int> MeasureSolidHorizontalBounds(const CelSprite &cel, int frame)
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{
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int nDataSize;
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auto src = reinterpret_cast<const uint8_t *>(CelGetFrame(cel.Data(), frame, &nDataSize));
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auto end = &src[nDataSize];
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const int celWidth = cel.Width(frame);
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int xBegin = celWidth;
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int xEnd = 0;
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int transparentRun = 0;
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int xCur = 0;
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bool firstTransparentRun = true;
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while (src < end) {
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std::int_fast16_t remainingWidth = celWidth;
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while (remainingWidth > 0) {
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const auto val = static_cast<std::uint8_t>(*src++);
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||||
if (IsCelTransparent(val)) {
|
||||
const int width = GetCelTransparentWidth(val);
|
||||
transparentRun += width;
|
||||
xCur += width;
|
||||
remainingWidth -= width;
|
||||
if (remainingWidth == 0) {
|
||||
xEnd = std::max(xEnd, celWidth - transparentRun);
|
||||
xCur = 0;
|
||||
firstTransparentRun = true;
|
||||
transparentRun = 0;
|
||||
}
|
||||
} else {
|
||||
if (firstTransparentRun) {
|
||||
xBegin = std::min(xBegin, transparentRun);
|
||||
firstTransparentRun = false;
|
||||
if (xBegin == 0 && xEnd == celWidth) {
|
||||
return { xBegin, xEnd };
|
||||
}
|
||||
}
|
||||
transparentRun = 0;
|
||||
xCur += val;
|
||||
src += val;
|
||||
remainingWidth -= val;
|
||||
if (remainingWidth == 0) {
|
||||
xEnd = celWidth;
|
||||
if (xBegin == 0) {
|
||||
return { xBegin, xEnd };
|
||||
}
|
||||
xCur = 0;
|
||||
firstTransparentRun = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return { xBegin, xEnd };
|
||||
}
|
||||
|
||||
} // namespace devilution
|
||||
Loading…
Add table
Add a link
Reference in a new issue