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GPU: Fix texcoord off-by-one error in rectangles

Browse Source
pull/22/head
Connor McLaughlin 6 years ago
parent 9f5bd6e5f9
commit 5626d4f282
5 changed files with 35 additions and 25 deletions
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1
src/core/gpu.h
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@ -101,7 +101,6 @@ protected:
{
return std::make_tuple(static_cast<u8>(texcoord), static_cast<u8>(texcoord >> 8));
}
static constexpr u16 PackTexcoord(u8 x, u8 y) { return ZeroExtend16(x) | (ZeroExtend16(y) << 8); }
static constexpr std::tuple<u8, u8, u8> UnpackColorRGB24(u32 rgb24)
{

46
src/core/gpu_hw.cpp
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@ -46,11 +46,14 @@ void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices, const u32* command
hw_vert.texpage = texpage;
if (textured)
hw_vert.texcoord = Truncate16(command_ptr[buffer_pos++]);
{
const auto [texcoord_x, texcoord_y] = UnpackTexcoord(Truncate16(command_ptr[buffer_pos++]));
hw_vert.texcoord = HWVertex::PackTexcoord(texcoord_x, texcoord_y);
}
else
{
hw_vert.texcoord = 0;
hw_vert.padding = 0;
}
m_batch.vertices.push_back(hw_vert);
if (restart_strip)
@ -74,9 +77,12 @@ void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices, const u32* command
const VertexPosition vp{command_ptr[buffer_pos++]};
const s32 pos_left = vp.x;
const s32 pos_top = vp.y;
const auto [tex_left, tex_top] = UnpackTexcoord(rc.texture_enable ? Truncate16(command_ptr[buffer_pos++]) : 0);
s32 rectangle_width;
s32 rectangle_height;
const auto [texcoord_x, texcoord_y] =
UnpackTexcoord(rc.texture_enable ? Truncate16(command_ptr[buffer_pos++]) : 0);
const u16 tex_left = ZeroExtend16(texcoord_x);
const u16 tex_top = ZeroExtend16(texcoord_y);
u32 rectangle_width;
u32 rectangle_height;
switch (rc.rectangle_size)
{
case DrawRectangleSize::R1x1:
@ -92,23 +98,27 @@ void GPU_HW::LoadVertices(RenderCommand rc, u32 num_vertices, const u32* command
rectangle_height = 16;
break;
default:
rectangle_width = static_cast<s32>(command_ptr[buffer_pos] & UINT32_C(0xFFFF));
rectangle_height = static_cast<s32>(command_ptr[buffer_pos] >> 16);
rectangle_width = command_ptr[buffer_pos] & 0xFFFF;
rectangle_height = command_ptr[buffer_pos] >> 16;
break;
}
// TODO: This should repeat the texcoords instead of stretching
const s32 pos_right = pos_left + rectangle_width;
const s32 pos_bottom = pos_top + rectangle_height;
const u8 tex_right = static_cast<u8>(tex_left + (rectangle_width - 1));
const u8 tex_bottom = static_cast<u8>(tex_top + (rectangle_height - 1));
const s32 pos_right = pos_left + static_cast<s32>(rectangle_width);
const s32 pos_bottom = pos_top + static_cast<s32>(rectangle_height);
const u16 tex_right = tex_left + static_cast<u16>(rectangle_width);
const u16 tex_bottom = tex_top + static_cast<u16>(rectangle_height);
m_batch.vertices.push_back(HWVertex{pos_left, pos_top, color, texpage, PackTexcoord(tex_left, tex_top)});
m_batch.vertices.push_back(
HWVertex{pos_left, pos_top, color, texpage, HWVertex::PackTexcoord(tex_left, tex_top)});
if (restart_strip)
m_batch.vertices.push_back(m_batch.vertices.back());
m_batch.vertices.push_back(HWVertex{pos_right, pos_top, color, texpage, PackTexcoord(tex_right, tex_top)});
m_batch.vertices.push_back(HWVertex{pos_left, pos_bottom, color, texpage, PackTexcoord(tex_left, tex_bottom)});
m_batch.vertices.push_back(HWVertex{pos_right, pos_bottom, color, texpage, PackTexcoord(tex_right, tex_bottom)});
m_batch.vertices.push_back(
HWVertex{pos_right, pos_top, color, texpage, HWVertex::PackTexcoord(tex_right, tex_top)});
m_batch.vertices.push_back(
HWVertex{pos_left, pos_bottom, color, texpage, HWVertex::PackTexcoord(tex_left, tex_bottom)});
m_batch.vertices.push_back(
HWVertex{pos_right, pos_bottom, color, texpage, HWVertex::PackTexcoord(tex_right, tex_bottom)});
}
break;
@ -197,7 +207,7 @@ std::string GPU_HW::GenerateVertexShader(bool textured)
ss << R"(
in ivec2 a_pos;
in vec4 a_col0;
in vec2 a_tex0;
in int a_texcoord;
in int a_texpage;
out vec3 v_col0;
@ -217,7 +227,7 @@ void main()
v_col0 = a_col0.rgb;
#if TEXTURED
v_tex0 = a_tex0;
v_tex0 = vec2(float(a_texcoord & 0xFFFF), float(a_texcoord >> 16)) / vec2(255.0);
// base_x,base_y,palette_x,palette_y
v_texpage.x = (a_texpage & 15) * 64 * RESOLUTION_SCALE;

6
src/core/gpu_hw.h
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@ -20,8 +20,10 @@ protected:
s32 y;
u32 color;
u32 texpage;
u16 texcoord;
u16 padding;
u32 texcoord;
// 16-bit texcoords are needed for 256 extent rectangles
static u32 PackTexcoord(u16 x, u16 y) { return ZeroExtend32(x) | (ZeroExtend32(y) << 16); }
};
struct HWRenderBatch

5
src/core/gpu_hw_opengl.cpp
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@ -221,8 +221,7 @@ void GPU_HW_OpenGL::CreateVertexBuffer()
glVertexAttribIPointer(0, 2, GL_INT, sizeof(HWVertex), reinterpret_cast<void*>(offsetof(HWVertex, x)));
glVertexAttribPointer(1, 4, GL_UNSIGNED_BYTE, true, sizeof(HWVertex),
reinterpret_cast<void*>(offsetof(HWVertex, color)));
glVertexAttribPointer(2, 2, GL_UNSIGNED_BYTE, true, sizeof(HWVertex),
reinterpret_cast<void*>(offsetof(HWVertex, texcoord)));
glVertexAttribIPointer(2, 2, GL_INT, sizeof(HWVertex), reinterpret_cast<void*>(offsetof(HWVertex, texcoord)));
glVertexAttribIPointer(3, 1, GL_INT, sizeof(HWVertex), reinterpret_cast<void*>(offsetof(HWVertex, texpage)));
glBindVertexArray(0);
@ -289,7 +288,7 @@ bool GPU_HW_OpenGL::CompileProgram(GL::Program& prog, TransparencyRenderMode tra
prog.BindAttribute(1, "a_col0");
if (textured)
{
prog.BindAttribute(2, "a_tex0");
prog.BindAttribute(2, "a_texcoord");
prog.BindAttribute(3, "a_texpage");
}

2
src/duckstation/sdl_interface.cpp
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@ -603,7 +603,7 @@ void SDLInterface::HandleSDLKeyEvent(const SDL_Event* event)
{
m_speed_limiter_enabled = !m_speed_limiter_enabled;
UpdateAudioVisualSync();
AddOSDMessage(m_speed_limiter_enabled ? "Speed limiter disabled" : "Speed limiter enabled");
AddOSDMessage(m_speed_limiter_enabled ? "Speed limiter enabled." : "Speed limiter disabled.");
}
}
break;

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