From c6ee050546b6940ae19a74f92bdcc8d2b1f56d22 Mon Sep 17 00:00:00 2001 From: "Steinar H. Gunderson" Date: Wed, 22 Nov 2017 19:28:14 +0100 Subject: [PATCH] Do some more cleanups in anticipation of more flexible compute shader outputs. Includes reverting back to last_phase instead of render_to_texture. --- effect_chain.cpp | 92 ++++++++++++++++++++++-------------------------- effect_chain.h | 7 ++-- 2 files changed, 47 insertions(+), 52 deletions(-) diff --git a/effect_chain.cpp b/effect_chain.cpp index 4afe415..091bda8 100644 --- a/effect_chain.cpp +++ b/effect_chain.cpp @@ -1901,11 +1901,6 @@ void EffectChain::render(GLuint dest_fbo, const vector &dest // We are rendering to a set of textures, so we can run the compute shader // directly and skip the dummy phase. --num_phases; - - // TODO: Support more than one destination. - output_textures[phases[num_phases - 1]] = destinations[0].texnum; - assert(destinations[0].format == GL_RGBA16F); - assert(destinations[0].texnum != 0); } for (unsigned phase_num = 0; phase_num < num_phases; ++phase_num) { @@ -1922,7 +1917,7 @@ void EffectChain::render(GLuint dest_fbo, const vector &dest glBeginQuery(GL_TIME_ELAPSED, timer_query_object); phase->timer_query_objects_running.push_back(timer_query_object); } - bool render_to_texture = true; + bool last_phase = (phase_num == num_phases - 1); if (phase_num == num_phases - 1) { // Last phase goes to the output the user specified. if (!phase->is_compute_shader) { @@ -1931,7 +1926,6 @@ void EffectChain::render(GLuint dest_fbo, const vector &dest GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); assert(status == GL_FRAMEBUFFER_COMPLETE); glViewport(x, y, width, height); - render_to_texture = false; } if (dither_effect != nullptr) { CHECK(dither_effect->set_int("output_width", width)); @@ -1942,7 +1936,7 @@ void EffectChain::render(GLuint dest_fbo, const vector &dest // Enable sRGB rendering for intermediates in case we are // rendering to an sRGB format. // TODO: Support this for compute shaders. - bool needs_srgb = render_to_texture ? true : final_srgb; + bool needs_srgb = last_phase ? final_srgb : true; if (needs_srgb && !current_srgb) { glEnable(GL_FRAMEBUFFER_SRGB); check_error(); @@ -1953,16 +1947,36 @@ void EffectChain::render(GLuint dest_fbo, const vector &dest current_srgb = true; } - execute_phase(phase, render_to_texture, &output_textures, &generated_mipmaps); + // Find a texture for this phase. + inform_input_sizes(phase); + find_output_size(phase); + GLuint tex_num = 0; + if (!last_phase) { + tex_num = resource_pool->create_2d_texture(intermediate_format, phase->output_width, phase->output_height); + assert(tex_num != 0); + output_textures.insert(make_pair(phase, tex_num)); + + // The output texture needs to have valid state to be written to by a compute shader. + glActiveTexture(GL_TEXTURE0); + check_error(); + glBindTexture(GL_TEXTURE_2D, tex_num); + check_error(); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + check_error(); + } else if (phase->is_compute_shader) { + // TODO: Support more than one destination. + assert(!destinations.empty()); + tex_num = destinations[0].texnum; + assert(destinations[0].format == GL_RGBA16F); + assert(destinations[0].texnum != 0); + } + + execute_phase(phase, output_textures, tex_num, &generated_mipmaps); if (do_phase_timing) { glEndQuery(GL_TIME_ELAPSED); } } - // Take out the destination textures from the list of temporary textures to be freed. - if (has_dummy_effect && !destinations.empty()) { - output_textures.erase(phases[num_phases - 1]); - } for (const auto &phase_and_texnum : output_textures) { resource_pool->release_2d_texture(phase_and_texnum.second); } @@ -2037,39 +2051,19 @@ void EffectChain::print_phase_timing() printf("Total: %5.1f ms\n", total_time_ms); } -void EffectChain::execute_phase(Phase *phase, bool render_to_texture, - map *output_textures, +void EffectChain::execute_phase(Phase *phase, + const map &output_textures, + GLuint dest_texture, set *generated_mipmaps) { - GLuint fbo = 0; - - // Find a texture for this phase. - inform_input_sizes(phase); - if (render_to_texture) { - find_output_size(phase); - - GLuint tex_num = resource_pool->create_2d_texture(intermediate_format, phase->output_width, phase->output_height); - assert(tex_num != 0); - output_textures->insert(make_pair(phase, tex_num)); - - // The output texture needs to have valid state to be written to by a compute shader. - if (phase->is_compute_shader) { - glActiveTexture(GL_TEXTURE0); - check_error(); - glBindTexture(GL_TEXTURE_2D, (*output_textures)[phase]); - check_error(); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - check_error(); - } - } - // Set up RTT inputs for this phase. for (unsigned sampler = 0; sampler < phase->inputs.size(); ++sampler) { glActiveTexture(GL_TEXTURE0 + sampler); Phase *input = phase->inputs[sampler]; input->output_node->bound_sampler_num = sampler; - assert(output_textures->count(input)); - glBindTexture(GL_TEXTURE_2D, (*output_textures)[input]); + const auto it = output_textures.find(input); + assert(it != output_textures.end()); + glBindTexture(GL_TEXTURE_2D, it->second); check_error(); if (phase->input_needs_mipmaps && generated_mipmaps->count(input) == 0) { glGenerateMipmap(GL_TEXTURE_2D); @@ -2084,24 +2078,23 @@ void EffectChain::execute_phase(Phase *phase, bool render_to_texture, check_error(); // And now the output. + GLuint fbo = 0; if (phase->is_compute_shader) { + assert(dest_texture != 0); + // This is currently the only place where we use image units, // so we can always use 0. phase->outbuf_image_unit = 0; - assert(output_textures->count(phase)); - glBindImageTexture(phase->outbuf_image_unit, (*output_textures)[phase], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA16F); + glBindImageTexture(phase->outbuf_image_unit, dest_texture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA16F); check_error(); phase->inv_output_size.x = 1.0f / phase->output_width; phase->inv_output_size.y = 1.0f / phase->output_height; phase->output_texcoord_adjust.x = 0.5f / phase->output_width; phase->output_texcoord_adjust.y = 0.5f / phase->output_height; - } else { - // (Already set up for us if we are outputting to the user's FBO.) - if (render_to_texture) { - fbo = resource_pool->create_fbo((*output_textures)[phase]); - glBindFramebuffer(GL_FRAMEBUFFER, fbo); - glViewport(0, 0, phase->output_width, phase->output_height); - } + } else if (dest_texture != 0) { + fbo = resource_pool->create_fbo(dest_texture); + glBindFramebuffer(GL_FRAMEBUFFER, fbo); + glViewport(0, 0, phase->output_width, phase->output_height); } // Give the required parameters to all the effects. @@ -2120,7 +2113,6 @@ void EffectChain::execute_phase(Phase *phase, bool render_to_texture, } } - if (phase->is_compute_shader) { unsigned x, y, z; phase->output_node->effect->get_compute_dimensions(phase->output_width, phase->output_height, &x, &y, &z); @@ -2154,7 +2146,7 @@ void EffectChain::execute_phase(Phase *phase, bool render_to_texture, resource_pool->unuse_glsl_program(instance_program_num); - if (render_to_texture && !phase->is_compute_shader) { + if (fbo != 0) { resource_pool->release_fbo(fbo); } } diff --git a/effect_chain.h b/effect_chain.h index 35931f8..ee387a9 100644 --- a/effect_chain.h +++ b/effect_chain.h @@ -481,8 +481,11 @@ private: unsigned x, unsigned y, unsigned width, unsigned height); // Execute one phase, ie. set up all inputs, effects and outputs, and render the quad. - void execute_phase(Phase *phase, bool render_to_texture, - std::map *output_textures, + // If dest_texture is 0, uses whatever output is current (and the phase must not be + // a compute shader). + void execute_phase(Phase *phase, + const std::map &output_textures, + GLuint dest_texture, std::set *generated_mipmaps); // Set up uniforms for one phase. The program must already be bound. -- 2.39.5