From addbcd5784c8195f49cecc20834537c80d1c8c72 Mon Sep 17 00:00:00 2001 From: wwylele <wwylele@gmail.com> Date: Tue, 22 Aug 2017 09:49:53 +0300 Subject: [PATCH] gl_rasterizer: implement custom clip plane --- .../renderer_opengl/gl_rasterizer.cpp | 28 +++++++ .../renderer_opengl/gl_rasterizer.h | 9 ++- .../renderer_opengl/gl_shader_gen.cpp | 80 +++++++++++-------- 3 files changed, 83 insertions(+), 34 deletions(-) diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp index aa95ef21da..7b0cd1b667 100644 --- a/src/video_core/renderer_opengl/gl_rasterizer.cpp +++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp @@ -169,6 +169,8 @@ RasterizerOpenGL::RasterizerOpenGL() : shader_dirty(true) { glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA32F, proctex_diff_lut_buffer.handle); // Sync fixed function OpenGL state + SyncClipEnabled(); + SyncClipCoef(); SyncCullMode(); SyncBlendEnabled(); SyncBlendFuncs(); @@ -401,6 +403,18 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) { SyncCullMode(); break; + // Clipping plane + case PICA_REG_INDEX(rasterizer.clip_enable): + SyncClipEnabled(); + break; + + case PICA_REG_INDEX_WORKAROUND(rasterizer.clip_coef[0], 0x48): + case PICA_REG_INDEX_WORKAROUND(rasterizer.clip_coef[1], 0x49): + case PICA_REG_INDEX_WORKAROUND(rasterizer.clip_coef[2], 0x4a): + case PICA_REG_INDEX_WORKAROUND(rasterizer.clip_coef[3], 0x4b): + SyncClipCoef(); + break; + // Depth modifiers case PICA_REG_INDEX(rasterizer.viewport_depth_range): SyncDepthScale(); @@ -1280,6 +1294,20 @@ void RasterizerOpenGL::SetShader() { } } +void RasterizerOpenGL::SyncClipEnabled() { + state.clip_distance[1] = Pica::g_state.regs.rasterizer.clip_enable != 0; +} + +void RasterizerOpenGL::SyncClipCoef() { + const auto raw_clip_coef = Pica::g_state.regs.rasterizer.GetClipCoef(); + const GLvec4 new_clip_coef = {raw_clip_coef.x.ToFloat32(), raw_clip_coef.y.ToFloat32(), + raw_clip_coef.z.ToFloat32(), raw_clip_coef.w.ToFloat32()}; + if (new_clip_coef != uniform_block_data.data.clip_coef) { + uniform_block_data.data.clip_coef = new_clip_coef; + uniform_block_data.dirty = true; + } +} + void RasterizerOpenGL::SyncCullMode() { const auto& regs = Pica::g_state.regs; diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h index 78e218efe1..46c62961c3 100644 --- a/src/video_core/renderer_opengl/gl_rasterizer.h +++ b/src/video_core/renderer_opengl/gl_rasterizer.h @@ -151,14 +151,21 @@ private: LightSrc light_src[8]; alignas(16) GLvec4 const_color[6]; // A vec4 color for each of the six tev stages alignas(16) GLvec4 tev_combiner_buffer_color; + alignas(16) GLvec4 clip_coef; }; static_assert( - sizeof(UniformData) == 0x460, + sizeof(UniformData) == 0x470, "The size of the UniformData structure has changed, update the structure in the shader"); static_assert(sizeof(UniformData) < 16384, "UniformData structure must be less than 16kb as per the OpenGL spec"); + /// Syncs the clip enabled status to match the PICA register + void SyncClipEnabled(); + + /// Syncs the clip coefficients to match the PICA register + void SyncClipCoef(); + /// Sets the OpenGL shader in accordance with the current PICA register state void SetShader(); diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp index 015e69da97..aa60b2e7f2 100644 --- a/src/video_core/renderer_opengl/gl_shader_gen.cpp +++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp @@ -24,6 +24,42 @@ using TevStageConfig = TexturingRegs::TevStageConfig; namespace GLShader { +static const std::string UniformBlockDef = R"( +#define NUM_TEV_STAGES 6 +#define NUM_LIGHTS 8 + +struct LightSrc { + vec3 specular_0; + vec3 specular_1; + vec3 diffuse; + vec3 ambient; + vec3 position; + vec3 spot_direction; + float dist_atten_bias; + float dist_atten_scale; +}; + +layout (std140) uniform shader_data { + vec2 framebuffer_scale; + int alphatest_ref; + float depth_scale; + float depth_offset; + int scissor_x1; + int scissor_y1; + int scissor_x2; + int scissor_y2; + vec3 fog_color; + vec2 proctex_noise_f; + vec2 proctex_noise_a; + vec2 proctex_noise_p; + vec3 lighting_global_ambient; + LightSrc light_src[NUM_LIGHTS]; + vec4 const_color[NUM_TEV_STAGES]; + vec4 tev_combiner_buffer_color; + vec4 clip_coef; +}; +)"; + PicaShaderConfig PicaShaderConfig::BuildFromRegs(const Pica::Regs& regs) { PicaShaderConfig res; @@ -1008,8 +1044,6 @@ std::string GenerateFragmentShader(const PicaShaderConfig& config) { std::string out = R"( #version 330 core -#define NUM_TEV_STAGES 6 -#define NUM_LIGHTS 8 in vec4 primary_color; in vec2 texcoord[3]; @@ -1021,36 +1055,6 @@ in vec4 gl_FragCoord; out vec4 color; -struct LightSrc { - vec3 specular_0; - vec3 specular_1; - vec3 diffuse; - vec3 ambient; - vec3 position; - vec3 spot_direction; - float dist_atten_bias; - float dist_atten_scale; -}; - -layout (std140) uniform shader_data { - vec2 framebuffer_scale; - int alphatest_ref; - float depth_scale; - float depth_offset; - int scissor_x1; - int scissor_y1; - int scissor_x2; - int scissor_y2; - vec3 fog_color; - vec2 proctex_noise_f; - vec2 proctex_noise_a; - vec2 proctex_noise_p; - vec3 lighting_global_ambient; - LightSrc light_src[NUM_LIGHTS]; - vec4 const_color[NUM_TEV_STAGES]; - vec4 tev_combiner_buffer_color; -}; - uniform sampler2D tex[3]; uniform samplerBuffer lighting_lut; uniform samplerBuffer fog_lut; @@ -1059,7 +1063,11 @@ uniform samplerBuffer proctex_color_map; uniform samplerBuffer proctex_alpha_map; uniform samplerBuffer proctex_lut; uniform samplerBuffer proctex_diff_lut; +)"; + out += UniformBlockDef; + + out += R"( // Rotate the vector v by the quaternion q vec3 quaternion_rotate(vec4 q, vec3 v) { return v + 2.0 * cross(q.xyz, cross(q.xyz, v) + q.w * v); @@ -1190,6 +1198,12 @@ out float texcoord0_w; out vec4 normquat; out vec3 view; +)"; + + out += UniformBlockDef; + + out += R"( + void main() { primary_color = vert_color; texcoord[0] = vert_texcoord0; @@ -1200,7 +1214,7 @@ void main() { view = vert_view; gl_Position = vert_position; gl_ClipDistance[0] = -vert_position.z; // fixed PICA clipping plane z <= 0 - // TODO (wwylele): calculate gl_ClipDistance[1] from user-defined clipping plane + gl_ClipDistance[1] = dot(clip_coef, vert_position); } )";