The-Homebrew-Cloud
/
ftpiiu_plugin
mirror of https://github.com/wiiu-env/ftpiiu_plugin.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
ftpiiu_plugin/source/3ds/imgui_citro3d.cpp

736 lines
22 KiB
C++
Raw Blame History

// ftpd is a server implementation based on the following:
// - RFC 959 (https://tools.ietf.org/html/rfc959)
// - RFC 3659 (https://tools.ietf.org/html/rfc3659)
// - suggested implementation details from https://cr.yp.to/ftp/filesystem.html
//
// The MIT License (MIT)
//
// Copyright (C) 2023 Michael Theall
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#ifndef CLASSIC
#include "imgui_citro3d.h"
#include <citro3d.h>
#include "vshader_shbin.h"
#include "imgui.h"
#include <algorithm>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <vector>
namespace
{
/// \brief 3DS font glyph ranges
std::vector<ImWchar> s_fontRanges;
/// \brief Vertex shader
DVLB_s *s_vsh = nullptr;
/// \brief Vertex shader program
shaderProgram_s s_program;
/// \brief Projection matrix uniform location
int s_projLocation;
/// \brief Top screen projection matrix
C3D_Mtx s_projTop;
/// \brief Bottom screen projection matrix
C3D_Mtx s_projBottom;
/// \brief System font textures
std::vector<C3D_Tex> s_fontTextures;
/// \brief Text scale
float s_textScale;
/// \brief Scissor test bounds
std::uint32_t s_boundScissor[4];
/// \brief Currently bound vertex data
ImDrawVert *s_boundVtxData;
/// \brief Currently bound texture
C3D_Tex *s_boundTexture;
/// \brief Vertex data buffer
ImDrawVert *s_vtxData = nullptr;
/// \brief Size of vertex data buffer
std::size_t s_vtxSize = 0;
/// \brief Index data buffer
ImDrawIdx *s_idxData = nullptr;
/// \brief Size of index data buffer
std::size_t s_idxSize = 0;
/// \brief Get code point from glyph index
/// \param font_ Font to search
/// \param glyphIndex_ Glyph index
std::uint32_t fontCodePointFromGlyphIndex (CFNT_s *const font_, int const glyphIndex_)
{
for (auto cmap = fontGetInfo (font_)->cmap; cmap; cmap = cmap->next)
{
switch (cmap->mappingMethod)
{
case CMAP_TYPE_DIRECT:
assert (cmap->codeEnd >= cmap->codeBegin);
if (glyphIndex_ >= cmap->indexOffset &&
glyphIndex_ <= cmap->codeEnd - cmap->codeBegin + cmap->indexOffset)
return glyphIndex_ - cmap->indexOffset + cmap->codeBegin;
break;
case CMAP_TYPE_TABLE:
for (int i = 0; i <= cmap->codeEnd - cmap->codeBegin; ++i)
{
if (cmap->indexTable[i] == glyphIndex_)
return cmap->codeBegin + i;
}
break;
case CMAP_TYPE_SCAN:
for (unsigned i = 0; i < cmap->nScanEntries; ++i)
{
assert (cmap->scanEntries[i].code >= cmap->codeBegin);
assert (cmap->scanEntries[i].code <= cmap->codeEnd);
if (glyphIndex_ == cmap->scanEntries[i].glyphIndex)
return cmap->scanEntries[i].code;
}
break;
}
}
return 0;
}
/// \brief Setup render state
/// \param screen_ Whether top or bottom screen
void setupRenderState (gfxScreen_t const screen_)
{
// disable face culling
C3D_CullFace (GPU_CULL_NONE);
// configure attributes for user with vertex shader
auto const attrInfo = C3D_GetAttrInfo ();
AttrInfo_Init (attrInfo);
AttrInfo_AddLoader (attrInfo, 0, GPU_FLOAT, 2); // v0 = inPos
AttrInfo_AddLoader (attrInfo, 1, GPU_FLOAT, 2); // v1 = inUv
AttrInfo_AddLoader (attrInfo, 2, GPU_UNSIGNED_BYTE, 4); // v2 = inColor
// clear bindings
std::memset (s_boundScissor, 0xFF, sizeof (s_boundScissor));
s_boundVtxData = nullptr;
s_boundTexture = nullptr;
// bind program
C3D_BindProgram (&s_program);
// enable depth test
C3D_DepthTest (true, GPU_GREATER, GPU_WRITE_COLOR);
// enable alpha blending
C3D_AlphaBlend (GPU_BLEND_ADD,
GPU_BLEND_ADD,
GPU_SRC_ALPHA,
GPU_ONE_MINUS_SRC_ALPHA,
GPU_SRC_ALPHA,
GPU_ONE_MINUS_SRC_ALPHA);
// apply projection matrix
if (screen_ == GFX_TOP)
C3D_FVUnifMtx4x4 (GPU_VERTEX_SHADER, s_projLocation, &s_projTop);
else
C3D_FVUnifMtx4x4 (GPU_VERTEX_SHADER, s_projLocation, &s_projBottom);
}
}
void imgui::citro3d::init ()
{
// setup back-end capabilities flags
auto &io = ImGui::GetIO ();
io.BackendRendererName = "citro3d";
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;
// load vertex shader
s_vsh = DVLB_ParseFile (
const_cast<std::uint32_t *> (reinterpret_cast<std::uint32_t const *> (vshader_shbin)),
vshader_shbin_size);
// initialize vertex shader program
shaderProgramInit (&s_program);
shaderProgramSetVsh (&s_program, &s_vsh->DVLE[0]);
// get projection matrix uniform location
s_projLocation = shaderInstanceGetUniformLocation (s_program.vertexShader, "proj");
// allocate vertex data buffer
s_vtxSize = 65536;
s_vtxData = reinterpret_cast<ImDrawVert *> (linearAlloc (sizeof (ImDrawVert) * s_vtxSize));
assert (s_vtxData);
// allocate index data buffer
s_idxSize = 65536;
s_idxData = reinterpret_cast<ImDrawIdx *> (linearAlloc (sizeof (ImDrawIdx) * s_idxSize));
assert (s_idxData);
// ensure the shared system font is mapped
if (R_FAILED (fontEnsureMapped ()))
assert (false);
// load the glyph texture sheets
auto const font = fontGetSystemFont ();
auto const fontInfo = fontGetInfo (font);
auto const glyphInfo = fontGetGlyphInfo (font);
assert (s_fontTextures.empty ());
s_fontTextures.resize (glyphInfo->nSheets + 1);
std::memset (s_fontTextures.data (), 0x00, s_fontTextures.size () * sizeof (s_fontTextures[0]));
s_textScale = 30.0f / glyphInfo->cellHeight;
// use system font sheets as citro3d textures
for (unsigned i = 0; i < glyphInfo->nSheets; ++i)
{
auto &tex = s_fontTextures[i];
tex.data = fontGetGlyphSheetTex (font, i);
assert (tex.data);
tex.fmt = static_cast<GPU_TEXCOLOR> (glyphInfo->sheetFmt);
tex.size = glyphInfo->sheetSize;
tex.width = glyphInfo->sheetWidth;
tex.height = glyphInfo->sheetHeight;
tex.param = GPU_TEXTURE_MAG_FILTER (GPU_LINEAR) | GPU_TEXTURE_MIN_FILTER (GPU_LINEAR) |
GPU_TEXTURE_WRAP_S (GPU_REPEAT) | GPU_TEXTURE_WRAP_T (GPU_REPEAT);
tex.border = 0xFFFFFFFF;
tex.lodParam = 0;
}
{
// create texture for ImGui's white pixel
auto &tex = s_fontTextures[glyphInfo->nSheets];
C3D_TexInit (&tex, 8, 8, GPU_A4);
// fill texture with full alpha
std::uint32_t size;
auto data = C3D_Tex2DGetImagePtr (&tex, 0, &size);
assert (data);
assert (size);
std::memset (data, 0xFF, size);
}
// get alternate character glyph
ImWchar alterChar = fontCodePointFromGlyphIndex (font, fontInfo->alterCharIndex);
if (!alterChar)
alterChar = '?';
// collect character map
std::vector<ImWchar> charSet;
for (auto cmap = fontInfo->cmap; cmap; cmap = cmap->next)
{
switch (cmap->mappingMethod)
{
case CMAP_TYPE_DIRECT:
assert (cmap->codeEnd >= cmap->codeBegin);
charSet.reserve (charSet.size () + cmap->codeEnd - cmap->codeBegin + 1);
for (auto i = cmap->codeBegin; i <= cmap->codeEnd; ++i)
{
if (cmap->indexOffset + (i - cmap->codeBegin) == 0xFFFF)
break;
charSet.emplace_back (i);
}
break;
case CMAP_TYPE_TABLE:
assert (cmap->codeEnd >= cmap->codeBegin);
charSet.reserve (charSet.size () + cmap->codeEnd - cmap->codeBegin + 1);
for (auto i = cmap->codeBegin; i <= cmap->codeEnd; ++i)
{
if (cmap->indexTable[i - cmap->codeBegin] == 0xFFFF)
continue;
charSet.emplace_back (i);
}
break;
case CMAP_TYPE_SCAN:
charSet.reserve (charSet.size () + cmap->nScanEntries);
for (unsigned i = 0; i < cmap->nScanEntries; ++i)
{
assert (cmap->scanEntries[i].code >= cmap->codeBegin);
assert (cmap->scanEntries[i].code <= cmap->codeEnd);
if (cmap->scanEntries[i].glyphIndex == 0xFFFF)
continue;
charSet.emplace_back (cmap->scanEntries[i].code);
}
break;
}
}
assert (!charSet.empty ());
// deduplicate character map
std::sort (std::begin (charSet), std::end (charSet));
charSet.erase (std::unique (std::begin (charSet), std::end (charSet)), std::end (charSet));
// fill in font glyph ranges
auto it = std::begin (charSet);
ImWchar start = *it++;
ImWchar prev = start;
while (it != std::end (charSet))
{
if (*it != prev + 1)
{
s_fontRanges.emplace_back (start);
s_fontRanges.emplace_back (prev);
start = *it;
}
prev = *it++;
}
s_fontRanges.emplace_back (start);
s_fontRanges.emplace_back (prev);
// terminate glyph ranges
s_fontRanges.emplace_back (0);
// initialize font atlas
auto const atlas = ImGui::GetIO ().Fonts;
atlas->Clear ();
atlas->TexWidth = glyphInfo->sheetWidth;
atlas->TexHeight = glyphInfo->sheetHeight * glyphInfo->nSheets;
atlas->TexUvScale = ImVec2 (1.0f / atlas->TexWidth, 1.0f / atlas->TexHeight);
atlas->TexUvWhitePixel = ImVec2 (0.5f * 0.125f, glyphInfo->nSheets + 0.5f * 0.125f);
atlas->TexPixelsAlpha8 = static_cast<unsigned char *> (IM_ALLOC (1)); // dummy allocation
// initialize font config
ImFontConfig config;
config.FontData = nullptr;
config.FontDataSize = 0;
config.FontDataOwnedByAtlas = true;
config.FontNo = 0;
config.SizePixels = 14.0f;
config.OversampleH = 3;
config.OversampleV = 1;
config.PixelSnapH = false;
config.GlyphExtraSpacing = ImVec2 (0.0f, 0.0f);
config.GlyphOffset = ImVec2 (0.0f, fontInfo->ascent);
config.GlyphRanges = s_fontRanges.data ();
config.GlyphMinAdvanceX = 0.0f;
config.GlyphMaxAdvanceX = std::numeric_limits<float>::max ();
config.MergeMode = false;
config.FontBuilderFlags = 0;
config.RasterizerMultiply = 1.0f;
config.EllipsisChar = 0x2026;
std::memset (config.Name, 0, sizeof (config.Name));
// create font
auto const imFont = IM_NEW (ImFont);
config.DstFont = imFont;
// add config and font to atlas
atlas->ConfigData.push_back (config);
atlas->Fonts.push_back (imFont);
atlas->SetTexID (s_fontTextures.data ());
// initialize font
imFont->FallbackAdvanceX = fontInfo->defaultWidth.charWidth;
imFont->FontSize = fontInfo->lineFeed;
imFont->ContainerAtlas = atlas;
imFont->ConfigData = &atlas->ConfigData[0];
imFont->ConfigDataCount = 1;
imFont->FallbackChar = alterChar;
imFont->EllipsisChar = config.EllipsisChar;
imFont->Scale = s_textScale * 0.5f;
imFont->Ascent = fontInfo->ascent;
imFont->Descent = 0.0f;
// add glyphs to font
fontGlyphPos_s glyphPos;
for (auto const &code : charSet)
{
auto const glyphIndex = fontGlyphIndexFromCodePoint (font, code);
assert (glyphIndex >= 0);
assert (glyphIndex < 0xFFFF);
// calculate glyph metrics
fontCalcGlyphPos (&glyphPos,
font,
glyphIndex,
GLYPH_POS_CALC_VTXCOORD | GLYPH_POS_AT_BASELINE,
1.0f,
1.0f);
assert (glyphPos.sheetIndex >= 0);
assert (static_cast<std::size_t> (glyphPos.sheetIndex) < s_fontTextures.size ());
// add glyph to font
imFont->AddGlyph (&config,
code,
glyphPos.vtxcoord.left,
glyphPos.vtxcoord.top + fontInfo->ascent,
glyphPos.vtxcoord.right,
glyphPos.vtxcoord.bottom + fontInfo->ascent,
glyphPos.texcoord.left,
glyphPos.sheetIndex + glyphPos.texcoord.top,
glyphPos.texcoord.right,
glyphPos.sheetIndex + glyphPos.texcoord.bottom,
glyphPos.xAdvance);
}
// build lookup table
imFont->BuildLookupTable ();
// tell imgui it is ready
atlas->TexReady = true;
}
void imgui::citro3d::exit ()
{
// free vertex/index data buffers
linearFree (s_idxData);
linearFree (s_vtxData);
// delete ImGui white pixel texture
assert (!s_fontTextures.empty ());
C3D_TexDelete (&s_fontTextures.back ());
// free shader program
shaderProgramFree (&s_program);
DVLB_Free (s_vsh);
}
void imgui::citro3d::render (C3D_RenderTarget *const top_, C3D_RenderTarget *const bottom_)
{
// get draw data
auto const drawData = ImGui::GetDrawData ();
if (drawData->CmdListsCount <= 0)
return;
// get framebuffer dimensions
unsigned width = drawData->DisplaySize.x * drawData->FramebufferScale.x;
unsigned height = drawData->DisplaySize.y * drawData->FramebufferScale.y;
if (width <= 0 || height <= 0)
return;
// initialize projection matrices
Mtx_OrthoTilt (&s_projTop,
0.0f,
drawData->DisplaySize.x,
drawData->DisplaySize.y * 0.5f,
0.0f,
-1.0f,
1.0f,
false);
Mtx_OrthoTilt (&s_projBottom,
drawData->DisplaySize.x * 0.1f,
drawData->DisplaySize.x * 0.9f,
drawData->DisplaySize.y,
drawData->DisplaySize.y * 0.5f,
-1.0f,
1.0f,
false);
// check if we need to grow vertex data buffer
if (s_vtxSize < static_cast<std::size_t> (drawData->TotalVtxCount))
{
linearFree (s_vtxData);
// add 10% to avoid growing many frames in a row
s_vtxSize = drawData->TotalVtxCount * 1.1f;
s_vtxData = reinterpret_cast<ImDrawVert *> (linearAlloc (sizeof (ImDrawVert) * s_vtxSize));
assert (s_vtxData);
}
// check if we need to grow index data buffer
if (s_idxSize < static_cast<std::size_t> (drawData->TotalIdxCount))
{
// add 10% to avoid growing many frames in a row
s_idxSize = drawData->TotalIdxCount * 1.1f;
s_idxData = reinterpret_cast<ImDrawIdx *> (linearAlloc (sizeof (ImDrawIdx) * s_idxSize));
assert (s_idxData);
}
// will project scissor/clipping rectangles into framebuffer space
// (0,0) unless using multi-viewports
auto const clipOff = drawData->DisplayPos;
// (1,1) unless using retina display which are often (2,2)
auto const clipScale = drawData->FramebufferScale;
// copy data into vertex/index buffers
std::size_t offsetVtx = 0;
std::size_t offsetIdx = 0;
for (int i = 0; i < drawData->CmdListsCount; ++i)
{
auto const &cmdList = *drawData->CmdLists[i];
// double check that we don't overrun vertex/index data buffers
assert (s_vtxSize - offsetVtx >= static_cast<std::size_t> (cmdList.VtxBuffer.Size));
assert (s_idxSize - offsetIdx >= static_cast<std::size_t> (cmdList.IdxBuffer.Size));
// copy vertex/index data into buffers
std::memcpy (&s_vtxData[offsetVtx],
cmdList.VtxBuffer.Data,
sizeof (ImDrawVert) * cmdList.VtxBuffer.Size);
std::memcpy (&s_idxData[offsetIdx],
cmdList.IdxBuffer.Data,
sizeof (ImDrawIdx) * cmdList.IdxBuffer.Size);
offsetVtx += cmdList.VtxBuffer.Size;
offsetIdx += cmdList.IdxBuffer.Size;
}
for (auto const &screen : {GFX_TOP, GFX_BOTTOM})
{
if (screen == GFX_TOP)
C3D_FrameDrawOn (top_);
else
C3D_FrameDrawOn (bottom_);
setupRenderState (screen);
offsetVtx = 0;
offsetIdx = 0;
// render command lists
for (int i = 0; i < drawData->CmdListsCount; ++i)
{
auto const &cmdList = *drawData->CmdLists[i];
for (auto const &cmd : cmdList.CmdBuffer)
{
if (cmd.UserCallback)
{
// user callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user
// to request the renderer to reset render state.)
if (cmd.UserCallback == ImDrawCallback_ResetRenderState)
setupRenderState (screen);
else
cmd.UserCallback (&cmdList, &cmd);
}
else
{
// project scissor/clipping rectangles into framebuffer space
ImVec4 clip;
clip.x = (cmd.ClipRect.x - clipOff.x) * clipScale.x;
clip.y = (cmd.ClipRect.y - clipOff.y) * clipScale.y;
clip.z = (cmd.ClipRect.z - clipOff.x) * clipScale.x;
clip.w = (cmd.ClipRect.w - clipOff.y) * clipScale.y;
if (clip.x >= width || clip.y >= height || clip.z < 0.0f || clip.w < 0.0f)
continue;
if (clip.x < 0.0f)
clip.x = 0.0f;
if (clip.y < 0.0f)
clip.y = 0.0f;
if (clip.z > width)
clip.z = width;
if (clip.w > height)
clip.z = height;
if (screen == GFX_TOP)
{
// check if clip starts on bottom screen
if (clip.y > height * 0.5f)
continue;
// convert from framebuffer space to screen space (3DS screen rotation)
auto const x1 =
std::clamp<unsigned> (height * 0.5f - clip.w, 0, height * 0.5f);
auto const y1 = std::clamp<unsigned> (width - clip.z, 0, width);
auto const x2 =
std::clamp<unsigned> (height * 0.5f - clip.y, 0, height * 0.5f);
auto const y2 = std::clamp<unsigned> (width - clip.x, 0, width);
// check if scissor needs to be updated
if (s_boundScissor[0] != x1 || s_boundScissor[1] != y1 ||
s_boundScissor[2] != x2 || s_boundScissor[3] != y2)
{
s_boundScissor[0] = x1;
s_boundScissor[1] = y1;
s_boundScissor[2] = x2;
s_boundScissor[3] = y2;
C3D_SetScissor (GPU_SCISSOR_NORMAL, x1, y1, x2, y2);
}
}
else
{
// check if clip ends on top screen
if (clip.w < height * 0.5f)
continue;
// check if clip ends before left edge of bottom screen
if (clip.z < width * 0.1f)
continue;
// check if clip starts after right edge of bottom screen
if (clip.x > width * 0.9f)
continue;
// convert from framebuffer space to screen space
// (3DS screen rotation + bottom screen offset)
auto const x1 = std::clamp<unsigned> (height - clip.w, 0, height * 0.5f);
auto const y1 =
std::clamp<unsigned> (width * 0.9f - clip.z, 0, width * 0.8f);
auto const x2 = std::clamp<unsigned> (height - clip.y, 0, height * 0.5f);
auto const y2 =
std::clamp<unsigned> (width * 0.9f - clip.x, 0, width * 0.8f);
// check if scissor needs to be updated
if (s_boundScissor[0] != x1 || s_boundScissor[1] != y1 ||
s_boundScissor[2] != x2 || s_boundScissor[3] != y2)
{
s_boundScissor[0] = x1;
s_boundScissor[1] = y1;
s_boundScissor[2] = x2;
s_boundScissor[3] = y2;
C3D_SetScissor (GPU_SCISSOR_NORMAL, x1, y1, x2, y2);
}
}
// check if we need to update vertex data binding
auto const vtxData = &s_vtxData[cmd.VtxOffset + offsetVtx];
if (vtxData != s_boundVtxData)
{
s_boundVtxData = vtxData;
auto const bufInfo = C3D_GetBufInfo ();
BufInfo_Init (bufInfo);
BufInfo_Add (bufInfo, vtxData, sizeof (ImDrawVert), 3, 0x210);
}
// check if we need to update texture binding
auto tex = static_cast<C3D_Tex *> (cmd.TextureId);
if (tex == s_fontTextures.data ())
{
assert (cmd.ElemCount % 3 == 0);
// get sheet number from uv coords
auto const getSheet = [] (auto const vtx_, auto const idx_) {
unsigned const sheet = std::min (
{vtx_[idx_[0]].uv.y, vtx_[idx_[1]].uv.y, vtx_[idx_[2]].uv.y});
// assert that these three vertices use the same sheet
for (unsigned i = 0; i < 3; ++i)
assert (vtx_[idx_[i]].uv.y - sheet <= 1.0f);
assert (sheet < s_fontTextures.size ());
return sheet;
};
/// \todo avoid repeating this work?
for (unsigned i = 0; i < cmd.ElemCount; i += 3)
{
auto const idx = &cmdList.IdxBuffer.Data[cmd.IdxOffset + i];
auto const vtx = &cmdList.VtxBuffer.Data[cmd.VtxOffset];
auto drawVtx = &s_vtxData[cmd.VtxOffset + offsetVtx];
auto const sheet = getSheet (vtx, idx);
if (sheet != 0)
{
float dummy;
drawVtx[idx[0]].uv.y = std::modf (drawVtx[idx[0]].uv.y, &dummy);
drawVtx[idx[1]].uv.y = std::modf (drawVtx[idx[1]].uv.y, &dummy);
drawVtx[idx[2]].uv.y = std::modf (drawVtx[idx[2]].uv.y, &dummy);
}
}
// initialize texture binding
unsigned boundSheet = getSheet (&cmdList.VtxBuffer.Data[cmd.VtxOffset],
&cmdList.IdxBuffer.Data[cmd.IdxOffset]);
assert (boundSheet < s_fontTextures.size ());
C3D_TexBind (0, &s_fontTextures[boundSheet]);
unsigned offset = 0;
// update texture environment for non-image drawing
auto const env = C3D_GetTexEnv (0);
C3D_TexEnvInit (env);
C3D_TexEnvSrc (
env, C3D_RGB, GPU_PRIMARY_COLOR, GPU_PRIMARY_COLOR, GPU_PRIMARY_COLOR);
C3D_TexEnvFunc (env, C3D_RGB, GPU_REPLACE);
C3D_TexEnvSrc (
env, C3D_Alpha, GPU_TEXTURE0, GPU_PRIMARY_COLOR, GPU_PRIMARY_COLOR);
C3D_TexEnvFunc (env, C3D_Alpha, GPU_MODULATE);
// process one triangle at a time
for (unsigned i = 3; i < cmd.ElemCount; i += 3)
{
// get sheet for this triangle
unsigned const sheet = getSheet (&cmdList.VtxBuffer.Data[cmd.VtxOffset],
&cmdList.IdxBuffer.Data[cmd.IdxOffset + i]);
// check if we're changing textures
if (boundSheet != sheet)
{
// draw everything up until now
C3D_DrawElements (GPU_TRIANGLES,
i - offset,
C3D_UNSIGNED_SHORT,
&s_idxData[cmd.IdxOffset + offsetIdx + offset]);
// bind texture for next draw call
boundSheet = sheet;
offset = i;
C3D_TexBind (0, &s_fontTextures[boundSheet]);
}
}
// draw the final set of triangles
assert ((cmd.ElemCount - offset) % 3 == 0);
C3D_DrawElements (GPU_TRIANGLES,
cmd.ElemCount - offset,
C3D_UNSIGNED_SHORT,
&s_idxData[cmd.IdxOffset + offsetIdx + offset]);
}
else
{
// drawing an image; check if we need to change texture binding
if (tex != s_boundTexture)
{
// bind new texture
C3D_TexBind (0, tex);
// update texture environment for drawing images
auto const env = C3D_GetTexEnv (0);
C3D_TexEnvInit (env);
C3D_TexEnvSrc (
env, C3D_Both, GPU_TEXTURE0, GPU_PRIMARY_COLOR, GPU_PRIMARY_COLOR);
C3D_TexEnvFunc (env, C3D_Both, GPU_MODULATE);
}
// draw triangles
C3D_DrawElements (GPU_TRIANGLES,
cmd.ElemCount,
C3D_UNSIGNED_SHORT,
&s_idxData[cmd.IdxOffset + offsetIdx]);
}
s_boundTexture = tex;
}
}
offsetVtx += cmdList.VtxBuffer.Size;
offsetIdx += cmdList.IdxBuffer.Size;
}
}
}
#endif
Reference in New Issue View Git Blame Copy Permalink