source/core/commands.cpp

   1 #include <algorithm>
   2 #include <msp/gl/extensions/arb_direct_state_access.h>
   3 #include <msp/gl/extensions/arb_draw_instanced.h>
   4 #include <msp/gl/extensions/arb_occlusion_query.h>
   5 #include <msp/gl/extensions/ext_framebuffer_blit.h>
   6 #include <msp/gl/extensions/ext_framebuffer_object.h>
   7 #include <msp/gl/extensions/msp_clear_buffer.h>
   8 #include "batch.h"
   9 #include "commands.h"
  10 #include "error.h"
  11 #include "gl.h"
  12 #include "pipelinestate.h"
  13 #include "query.h"
  14
  15 using namespace std;
  16
  17 namespace Msp {
  18 namespace GL {
  19
  20 Commands::Commands():
  21         pipeline_state(0)
  22 { }
  23
  24 void Commands::use_pipeline(const PipelineState *ps)
  25 {
  26         pipeline_state = ps;
  27         if(!pipeline_state)
  28                 PipelineState::clear();
  29 }
  30
  31 void Commands::clear(const ClearValue *values)
  32 {
  33         const Framebuffer *target = pipeline_state->get_framebuffer();
  34         if(!target)
  35                 throw invalid_operation("OpenGLCommands::clear");
  36
  37         if(!ARB_direct_state_access)
  38         {
  39                 static Require _req(MSP_clear_buffer);
  40                 pipeline_state->apply();
  41         }
  42
  43         unsigned i = 0;
  44         for(FrameAttachment a: target->get_format())
  45         {
  46                 if(get_attach_point(a)==get_attach_point(DEPTH_ATTACHMENT))
  47                 {
  48                         if(ARB_direct_state_access)
  49                                 glClearNamedFramebufferfv(target->id, GL_DEPTH, 0, &values->depth_stencil.depth);
  50                         else
  51                                 glClearBufferfv(GL_DEPTH, 0, &values->depth_stencil.depth);
  52                 }
  53                 else if(get_attach_point(a)==get_attach_point(STENCIL_ATTACHMENT))
  54                 {
  55                         if(ARB_direct_state_access)
  56                                 glClearNamedFramebufferiv(target->id, GL_STENCIL, 0, &values->depth_stencil.stencil);
  57                         else
  58                                 glClearBufferiv(GL_STENCIL, 0, &values->depth_stencil.stencil);
  59                 }
  60                 else
  61                 {
  62                         if(ARB_direct_state_access)
  63                                 glClearNamedFramebufferfv(target->id, GL_COLOR, i++, &values->color.r);
  64                         else
  65                                 glClearBufferfv(GL_COLOR, i++, &values->color.r);
  66                 }
  67                 ++values;
  68         }
  69 }
  70
  71 void Commands::draw(const Batch &batch)
  72 {
  73         pipeline_state->apply();
  74         void *data_ptr = reinterpret_cast<void *>(batch.get_offset());
  75         glDrawElements(batch.get_gl_primitive_type(), batch.size(), batch.get_gl_index_type(), data_ptr);
  76 }
  77
  78 void Commands::draw_instanced(const Batch &batch, unsigned count)
  79 {
  80         static Require req(ARB_draw_instanced);
  81
  82         pipeline_state->apply();
  83         void *data_ptr = reinterpret_cast<void *>(batch.get_offset());
  84         glDrawElementsInstanced(batch.get_gl_primitive_type(), batch.size(), batch.get_gl_index_type(), data_ptr, count);
  85 }
  86
  87 void Commands::resolve_multisample(Framebuffer &target)
  88 {
  89         static Require _req(EXT_framebuffer_blit);
  90
  91         const Framebuffer *source = pipeline_state->get_framebuffer();
  92
  93         unsigned width = min(source->get_width(), target.get_width());
  94         unsigned height = min(source->get_height(), target.get_height());
  95         unsigned buffers = get_gl_buffer_bits(source->get_format())&get_gl_buffer_bits(target.get_format());
  96
  97         if(ARB_direct_state_access)
  98                 glBlitNamedFramebuffer(source->id, target.id, 0, 0, width, height, 0, 0, width, height, buffers, GL_NEAREST);
  99         else
 100         {
 101                 glBindFramebuffer(GL_READ_FRAMEBUFFER, source->id);
 102                 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, target.id);
 103
 104                 target.refresh();
 105
 106                 glBlitFramebuffer(0, 0, width, height, 0, 0, width, height, buffers, GL_NEAREST);
 107
 108                 glBindFramebuffer(GL_FRAMEBUFFER, source->id);
 109         }
 110 }
 111
 112 void Commands::begin_query(const QueryPool &pool, unsigned index)
 113 {
 114         if(index>=pool.queries.size())
 115                 throw out_of_range("OpenGLCommands::begin_query");
 116         glBeginQuery(pool.gl_type, pool.queries[index]);
 117 }
 118
 119 void Commands::end_query(const QueryPool &pool, unsigned)
 120 {
 121         glEndQuery(pool.gl_type);
 122 }
 123
 124 } // namespace GL
 125 } // namespace Msp