EXTERN_C_ENTER
JNIEXPORT void JNICALL Java_org_lwjgl_opengl_ARBDrawInstanced_glDrawArraysInstancedARB(JNIEnv *__env, jclass clazz, jint mode, jint first, jint count, jint primcount) {
glDrawArraysInstancedARBPROC glDrawArraysInstancedARB = (glDrawArraysInstancedARBPROC)tlsGetFunction(1108);
UNUSED_PARAM(clazz)
glDrawArraysInstancedARB(mode, first, count, primcount);
}
void
piglit_init(int argc, char **argv)
{
bool pass = true;
GLuint list;
piglit_require_extension("GL_ARB_draw_instanced");
list = glGenLists(1);
glNewList(list, GL_COMPILE);
glDrawArraysInstancedARB(GL_TRIANGLES, 0, 2, 3);
if (!piglit_check_gl_error(GL_INVALID_OPERATION))
pass = false;
glDrawElementsInstancedARB(GL_TRIANGLES, 2, GL_UNSIGNED_INT, NULL, 3);
if (!piglit_check_gl_error(GL_INVALID_OPERATION))
pass = false;
glEndList();
/* Make sure the list is empty. */
glCallList(list);
if (!piglit_check_gl_error(0))
pass = false;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
void
piglit_init(int argc, char **argv)
{
bool pass = true;
piglit_require_extension("GL_ARB_draw_instanced");
glDrawArraysInstancedARB(GL_TRIANGLES, -1, 2, 3);
if (!piglit_check_gl_error(GL_INVALID_VALUE))
pass = false;
glDrawElementsInstancedARB(GL_TRIANGLES, 2, GL_INT, NULL, 3);
if (!piglit_check_gl_error(GL_INVALID_ENUM))
pass = false;
glDrawElementsInstancedARB(GL_TRIANGLES, 2, GL_SHORT, NULL, 3);
if (!piglit_check_gl_error(GL_INVALID_ENUM))
pass = false;
glDrawElementsInstancedARB(GL_TRIANGLES, 2, GL_BYTE, NULL, 3);
if (!piglit_check_gl_error(GL_INVALID_ENUM))
pass = false;
glDrawElementsInstancedARB(GL_TRIANGLES, 2, GL_FLOAT, NULL, 3);
if (!piglit_check_gl_error(GL_INVALID_ENUM))
pass = false;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
void InstancingApp::Render(void)
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(instancingProg);
glBindVertexArray(square_vao);
glDrawArraysInstancedARB(GL_TRIANGLE_FAN, 0, 4, 4);
}
static GLboolean
test_instancing(GLuint divisor)
{
static const GLfloat verts[4][2] = {
{-1, -1}, {1, -1}, {1, 1}, {-1, 1}
};
glVertexPointer(2, GL_FLOAT, 0, verts);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexAttribPointer(PosAttrib, 2, GL_FLOAT, GL_FALSE, 0, Positions);
glVertexAttribPointer(ColorAttrib, 4, GL_FLOAT, GL_FALSE, 0, Colors);
glEnableVertexAttribArray(PosAttrib);
glEnableVertexAttribArray(ColorAttrib);
glVertexAttribDivisorARB(PosAttrib, 1);
/* advance color once every 'n' instances */
glVertexAttribDivisorARB(ColorAttrib, divisor);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(Program);
glDrawArraysInstancedARB(GL_POLYGON, 0, 4, PRIMS);
glUseProgram(0);
{
GLint i;
GLint pos[4];
for (i = 0; i < PRIMS; i++) {
GLuint elem = i / divisor;
/* use glRasterPos to determine where to read a sample pixel */
glRasterPos2fv(Positions[i]);
glGetIntegerv(GL_CURRENT_RASTER_POSITION, pos);
if (!piglit_probe_pixel_rgba(pos[0], pos[1], Colors[elem])) {
fprintf(stderr, "%s: instance %d failed to draw correctly\n",
TestName, i);
fprintf(stderr, "%s: color instance divisor = %u\n",
TestName, divisor);
glutSwapBuffers();
return GL_FALSE;
}
}
}
glDisableClientState(GL_VERTEX_ARRAY);
glDisableVertexAttribArray(PosAttrib);
glDisableVertexAttribArray(ColorAttrib);
glutSwapBuffers();
return GL_TRUE;
}
inline void VL_glDrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount)
{
if (glDrawArraysInstanced)
glDrawArraysInstanced(mode, first, count, primcount);
else
if (glDrawArraysInstancedARB)
glDrawArraysInstancedARB(mode, first, count, primcount);
else
if (glDrawArraysInstancedEXT)
glDrawArraysInstancedEXT(mode, first, count, primcount);
else
VL_UNSUPPORTED_FUNC();
}
// Called to draw scene
void RenderScene(void)
{
static CStopWatch rotTimer;
// Clear the window and the depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
modelViewMatrix.PushMatrix(viewFrame);
modelViewMatrix.Translate(0.0f, 0.0f, 800.0f);
modelViewMatrix.Rotate(-12.0, 1.0f, 0.0f, 0.0f);
modelViewMatrix.Rotate(rotTimer.GetElapsedSeconds() * 15.0f, 0.0f, 1.0f, 0.0f);
glUseProgram(grassShader);
glUniformMatrix4fv(locMVP, 1, GL_FALSE, transformPipeline.GetModelViewProjectionMatrix());
glBindVertexArray(vao);
glDrawArraysInstancedARB(GL_TRIANGLE_STRIP, 0, 6, 1024 * 1024);
modelViewMatrix.PopMatrix();
glutSwapBuffers();
glutPostRedisplay();
}
bool GPU_fx_do_composite_pass(
GPUFX *fx, float projmat[4][4], bool is_persp,
struct Scene *scene, struct GPUOffScreen *ofs)
{
GPUTexture *src, *target;
int numslots = 0;
float invproj[4][4];
int i;
float dfdyfac[2];
/* number of passes left. when there are no more passes, the result is passed to the frambuffer */
int passes_left = fx->num_passes;
/* view vectors for the corners of the view frustum. Can be used to recreate the world space position easily */
float viewvecs[3][4] = {
{-1.0f, -1.0f, -1.0f, 1.0f},
{1.0f, -1.0f, -1.0f, 1.0f},
{-1.0f, 1.0f, -1.0f, 1.0f}
};
if (fx->effects == 0)
return false;
GPU_get_dfdy_factors(dfdyfac);
/* first, unbind the render-to-texture framebuffer */
GPU_framebuffer_texture_detach(fx->color_buffer);
GPU_framebuffer_texture_detach(fx->depth_buffer);
if (fx->restore_stencil)
glPopAttrib();
src = fx->color_buffer;
target = fx->color_buffer_sec;
/* set up quad buffer */
glBindBuffer(GL_ARRAY_BUFFER, fx->vbuffer);
glVertexPointer(2, GL_FLOAT, 0, NULL);
glTexCoordPointer(2, GL_FLOAT, 0, ((GLubyte *)NULL + 8 * sizeof(float)));
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
/* full screen FX pass */
/* invert the view matrix */
invert_m4_m4(invproj, projmat);
/* convert the view vectors to view space */
for (i = 0; i < 3; i++) {
mul_m4_v4(invproj, viewvecs[i]);
/* normalized trick see http://www.derschmale.com/2014/01/26/reconstructing-positions-from-the-depth-buffer */
mul_v3_fl(viewvecs[i], 1.0f / viewvecs[i][3]);
if (is_persp)
mul_v3_fl(viewvecs[i], 1.0f / viewvecs[i][2]);
viewvecs[i][3] = 1.0;
}
/* we need to store the differences */
viewvecs[1][0] -= viewvecs[0][0];
viewvecs[1][1] = viewvecs[2][1] - viewvecs[0][1];
/* calculate a depth offset as well */
if (!is_persp) {
float vec_far[] = {-1.0f, -1.0f, 1.0f, 1.0f};
mul_m4_v4(invproj, vec_far);
mul_v3_fl(vec_far, 1.0f / vec_far[3]);
viewvecs[1][2] = vec_far[2] - viewvecs[0][2];
}
/* set invalid color in case shader fails */
glColor3f(1.0, 0.0, 1.0);
glDisable(GL_DEPTH_TEST);
/* ssao pass */
if (fx->effects & GPU_FX_FLAG_SSAO) {
GPUShader *ssao_shader;
ssao_shader = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_SSAO, is_persp);
if (ssao_shader) {
const GPUSSAOSettings *fx_ssao = fx->settings.ssao;
int color_uniform, depth_uniform;
int ssao_uniform, ssao_color_uniform, viewvecs_uniform, ssao_sample_params_uniform;
int ssao_jitter_uniform, ssao_concentric_tex;
float ssao_params[4] = {fx_ssao->distance_max, fx_ssao->factor, fx_ssao->attenuation, 0.0f};
float sample_params[3];
sample_params[0] = fx->ssao_sample_count_cache;
/* multiplier so we tile the random texture on screen */
sample_params[1] = fx->gbuffer_dim[0] / 64.0;
sample_params[2] = fx->gbuffer_dim[1] / 64.0;
ssao_params[3] = (passes_left == 1 && !ofs) ? dfdyfac[0] : dfdyfac[1];
ssao_uniform = GPU_shader_get_uniform(ssao_shader, "ssao_params");
ssao_color_uniform = GPU_shader_get_uniform(ssao_shader, "ssao_color");
color_uniform = GPU_shader_get_uniform(ssao_shader, "colorbuffer");
depth_uniform = GPU_shader_get_uniform(ssao_shader, "depthbuffer");
viewvecs_uniform = GPU_shader_get_uniform(ssao_shader, "viewvecs");
ssao_sample_params_uniform = GPU_shader_get_uniform(ssao_shader, "ssao_sample_params");
ssao_concentric_tex = GPU_shader_get_uniform(ssao_shader, "ssao_concentric_tex");
ssao_jitter_uniform = GPU_shader_get_uniform(ssao_shader, "jitter_tex");
GPU_shader_bind(ssao_shader);
GPU_shader_uniform_vector(ssao_shader, ssao_uniform, 4, 1, ssao_params);
GPU_shader_uniform_vector(ssao_shader, ssao_color_uniform, 4, 1, fx_ssao->color);
GPU_shader_uniform_vector(ssao_shader, viewvecs_uniform, 4, 3, viewvecs[0]);
GPU_shader_uniform_vector(ssao_shader, ssao_sample_params_uniform, 3, 1, sample_params);
GPU_texture_bind(src, numslots++);
GPU_shader_uniform_texture(ssao_shader, color_uniform, src);
GPU_texture_bind(fx->depth_buffer, numslots++);
GPU_texture_filter_mode(fx->depth_buffer, false, true);
GPU_shader_uniform_texture(ssao_shader, depth_uniform, fx->depth_buffer);
GPU_texture_bind(fx->jitter_buffer, numslots++);
GPU_shader_uniform_texture(ssao_shader, ssao_jitter_uniform, fx->jitter_buffer);
GPU_texture_bind(fx->ssao_spiral_samples_tex, numslots++);
GPU_shader_uniform_texture(ssao_shader, ssao_concentric_tex, fx->ssao_spiral_samples_tex);
/* draw */
gpu_fx_bind_render_target(&passes_left, fx, ofs, target);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_unbind(src);
GPU_texture_filter_mode(fx->depth_buffer, true, false);
GPU_texture_unbind(fx->depth_buffer);
GPU_texture_unbind(fx->jitter_buffer);
GPU_texture_unbind(fx->ssao_spiral_samples_tex);
/* may not be attached, in that case this just returns */
if (target) {
GPU_framebuffer_texture_detach(target);
if (ofs) {
GPU_offscreen_bind(ofs, false);
}
else {
GPU_framebuffer_restore();
}
}
/* swap here, after src/target have been unbound */
SWAP(GPUTexture *, target, src);
numslots = 0;
}
}
/* second pass, dof */
if (fx->effects & GPU_FX_FLAG_DOF) {
const GPUDOFSettings *fx_dof = fx->settings.dof;
float dof_params[4];
float scale = scene->unit.system ? scene->unit.scale_length : 1.0f;
/* this is factor that converts to the scene scale. focal length and sensor are expressed in mm
* unit.scale_length is how many meters per blender unit we have. We want to convert to blender units though
* because the shader reads coordinates in world space, which is in blender units. */
float scale_camera = 0.001f / scale;
/* we want radius here for the aperture number */
float aperture = 0.5f * scale_camera * fx_dof->focal_length / fx_dof->fstop;
dof_params[0] = aperture * fabsf(scale_camera * fx_dof->focal_length /
((fx_dof->focus_distance / scale) - scale_camera * fx_dof->focal_length));
dof_params[1] = fx_dof->focus_distance / scale;
dof_params[2] = fx->gbuffer_dim[0] / (scale_camera * fx_dof->sensor);
dof_params[3] = fx_dof->num_blades;
if (fx->dof_high_quality) {
GPUShader *dof_shader_pass1, *dof_shader_pass2, *dof_shader_pass3;
/* custom shaders close to the effect described in CryEngine 3 Graphics Gems */
dof_shader_pass1 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_HQ_PASS_ONE, is_persp);
dof_shader_pass2 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_HQ_PASS_TWO, is_persp);
dof_shader_pass3 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_HQ_PASS_THREE, is_persp);
/* error occured, restore framebuffers and return */
if (!(dof_shader_pass1 && dof_shader_pass2 && dof_shader_pass3)) {
GPU_framebuffer_texture_unbind(fx->gbuffer, NULL);
GPU_framebuffer_restore();
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
GPU_shader_unbind();
glBindBuffer(GL_ARRAY_BUFFER, 0);
return false;
}
/* pass first, downsample the color buffer to near/far targets and calculate coc texture */
{
int depth_uniform, dof_uniform;
int viewvecs_uniform;
int invrendertargetdim_uniform, color_uniform;
float invrendertargetdim[2] = {1.0f / fx->dof_downsampled_w, 1.0f / fx->dof_downsampled_h};
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass1, "invrendertargetdim");
color_uniform = GPU_shader_get_uniform(dof_shader_pass1, "colorbuffer");
dof_uniform = GPU_shader_get_uniform(dof_shader_pass1, "dof_params");
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass1, "invrendertargetdim");
depth_uniform = GPU_shader_get_uniform(dof_shader_pass1, "depthbuffer");
viewvecs_uniform = GPU_shader_get_uniform(dof_shader_pass1, "viewvecs");
GPU_shader_bind(dof_shader_pass1);
GPU_shader_uniform_vector(dof_shader_pass1, dof_uniform, 4, 1, dof_params);
GPU_shader_uniform_vector(dof_shader_pass1, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_shader_uniform_vector(dof_shader_pass1, viewvecs_uniform, 4, 3, viewvecs[0]);
GPU_shader_uniform_vector(dof_shader_pass1, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_texture_bind(fx->depth_buffer, numslots++);
GPU_texture_filter_mode(fx->depth_buffer, false, false);
GPU_shader_uniform_texture(dof_shader_pass1, depth_uniform, fx->depth_buffer);
GPU_texture_bind(src, numslots++);
/* disable filtering for the texture so custom downsample can do the right thing */
GPU_texture_filter_mode(src, false, false);
GPU_shader_uniform_texture(dof_shader_pass2, color_uniform, src);
/* target is the downsampled coc buffer */
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_half_downsampled_near, 0, NULL);
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_half_downsampled_far, 1, NULL);
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_nearfar_coc, 2, NULL);
/* binding takes care of setting the viewport to the downsampled size */
GPU_framebuffer_slots_bind(fx->gbuffer, 0);
GPU_framebuffer_check_valid(fx->gbuffer, NULL);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_filter_mode(src, false, true);
GPU_texture_unbind(src);
GPU_texture_filter_mode(fx->depth_buffer, true, false);
GPU_texture_unbind(fx->depth_buffer);
GPU_framebuffer_texture_detach(fx->dof_half_downsampled_near);
GPU_framebuffer_texture_detach(fx->dof_half_downsampled_far);
GPU_framebuffer_texture_detach(fx->dof_nearfar_coc);
GPU_framebuffer_texture_unbind(fx->gbuffer, fx->dof_half_downsampled_near);
numslots = 0;
}
/* second pass, shoot quads for every pixel in the downsampled buffers, scaling according
* to circle of confusion */
{
int rendertargetdim_uniform, coc_uniform, color_uniform, select_uniform, dof_uniform;
int rendertargetdim[2] = {fx->dof_downsampled_w, fx->dof_downsampled_h};
float selection[2] = {0.0f, 1.0f};
rendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass2, "rendertargetdim");
color_uniform = GPU_shader_get_uniform(dof_shader_pass2, "colorbuffer");
coc_uniform = GPU_shader_get_uniform(dof_shader_pass2, "cocbuffer");
select_uniform = GPU_shader_get_uniform(dof_shader_pass2, "layerselection");
dof_uniform = GPU_shader_get_uniform(dof_shader_pass2, "dof_params");
GPU_shader_bind(dof_shader_pass2);
GPU_shader_uniform_vector(dof_shader_pass2, dof_uniform, 4, 1, dof_params);
GPU_shader_uniform_vector_int(dof_shader_pass2, rendertargetdim_uniform, 2, 1, rendertargetdim);
GPU_shader_uniform_vector(dof_shader_pass2, select_uniform, 2, 1, selection);
GPU_texture_bind(fx->dof_nearfar_coc, numslots++);
GPU_shader_uniform_texture(dof_shader_pass2, coc_uniform, fx->dof_nearfar_coc);
GPU_texture_bind(fx->dof_half_downsampled_far, numslots++);
GPU_texture_bind(fx->dof_half_downsampled_near, numslots++);
GPU_shader_uniform_texture(dof_shader_pass2, color_uniform, fx->dof_half_downsampled_far);
GPU_texture_filter_mode(fx->dof_half_downsampled_far, false, false);
/* target is the downsampled coc buffer */
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_far_blur, 0, NULL);
GPU_texture_bind_as_framebuffer(fx->dof_far_blur);
glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glPointSize(1.0f);
/* have to clear the buffer unfortunately */
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* the draw call we all waited for, draw a point per pixel, scaled per circle of confusion */
glDrawArraysInstancedARB(GL_POINTS, 0, 1, fx->dof_downsampled_w * fx->dof_downsampled_h);
GPU_texture_unbind(fx->dof_half_downsampled_far);
GPU_framebuffer_texture_detach(fx->dof_far_blur);
GPU_shader_uniform_texture(dof_shader_pass2, color_uniform, fx->dof_half_downsampled_near);
GPU_texture_filter_mode(fx->dof_half_downsampled_near, false, false);
selection[0] = 1.0f;
selection[1] = 0.0f;
GPU_shader_uniform_vector(dof_shader_pass2, select_uniform, 2, 1, selection);
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_near_blur, 0, NULL);
/* have to clear the buffer unfortunately */
glClear(GL_COLOR_BUFFER_BIT);
/* the draw call we all waited for, draw a point per pixel, scaled per circle of confusion */
glDrawArraysInstancedARB(GL_POINTS, 0, 1, fx->dof_downsampled_w * fx->dof_downsampled_h);
/* disable bindings */
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_BLEND);
GPU_framebuffer_texture_detach(fx->dof_near_blur);
GPU_texture_unbind(fx->dof_half_downsampled_near);
GPU_texture_unbind(fx->dof_nearfar_coc);
GPU_framebuffer_texture_unbind(fx->gbuffer, fx->dof_far_blur);
}
/* third pass, accumulate the near/far blur fields */
{
int invrendertargetdim_uniform, near_uniform, color_uniform;
int dof_uniform, far_uniform, viewvecs_uniform, depth_uniform;
float invrendertargetdim[2] = {1.0f / fx->dof_downsampled_w, 1.0f / fx->dof_downsampled_h};
dof_uniform = GPU_shader_get_uniform(dof_shader_pass3, "dof_params");
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass3, "invrendertargetdim");
color_uniform = GPU_shader_get_uniform(dof_shader_pass3, "colorbuffer");
far_uniform = GPU_shader_get_uniform(dof_shader_pass3, "farbuffer");
near_uniform = GPU_shader_get_uniform(dof_shader_pass3, "nearbuffer");
viewvecs_uniform = GPU_shader_get_uniform(dof_shader_pass3, "viewvecs");
depth_uniform = GPU_shader_get_uniform(dof_shader_pass3, "depthbuffer");
GPU_shader_bind(dof_shader_pass3);
GPU_shader_uniform_vector(dof_shader_pass3, dof_uniform, 4, 1, dof_params);
GPU_shader_uniform_vector(dof_shader_pass3, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_shader_uniform_vector(dof_shader_pass3, viewvecs_uniform, 4, 3, viewvecs[0]);
GPU_texture_bind(fx->dof_near_blur, numslots++);
GPU_shader_uniform_texture(dof_shader_pass3, near_uniform, fx->dof_near_blur);
GPU_texture_filter_mode(fx->dof_near_blur, false, true);
GPU_texture_bind(fx->dof_far_blur, numslots++);
GPU_shader_uniform_texture(dof_shader_pass3, far_uniform, fx->dof_far_blur);
GPU_texture_filter_mode(fx->dof_far_blur, false, true);
GPU_texture_bind(fx->depth_buffer, numslots++);
GPU_texture_filter_mode(fx->depth_buffer, false, false);
GPU_shader_uniform_texture(dof_shader_pass3, depth_uniform, fx->depth_buffer);
GPU_texture_bind(src, numslots++);
GPU_shader_uniform_texture(dof_shader_pass3, color_uniform, src);
/* if this is the last pass, prepare for rendering on the frambuffer */
gpu_fx_bind_render_target(&passes_left, fx, ofs, target);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_unbind(fx->dof_near_blur);
GPU_texture_unbind(fx->dof_far_blur);
GPU_texture_unbind(src);
GPU_texture_filter_mode(fx->depth_buffer, true, false);
GPU_texture_unbind(fx->depth_buffer);
/* may not be attached, in that case this just returns */
if (target) {
GPU_framebuffer_texture_detach(target);
if (ofs) {
GPU_offscreen_bind(ofs, false);
}
else {
GPU_framebuffer_restore();
}
}
numslots = 0;
}
}
else {
GPUShader *dof_shader_pass1, *dof_shader_pass2, *dof_shader_pass3, *dof_shader_pass4, *dof_shader_pass5;
/* DOF effect has many passes but most of them are performed
* on a texture whose dimensions are 4 times less than the original
* (16 times lower than original screen resolution).
* Technique used is not very exact but should be fast enough and is based
* on "Practical Post-Process Depth of Field"
* see http://http.developer.nvidia.com/GPUGems3/gpugems3_ch28.html */
dof_shader_pass1 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_PASS_ONE, is_persp);
dof_shader_pass2 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_PASS_TWO, is_persp);
dof_shader_pass3 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_PASS_THREE, is_persp);
dof_shader_pass4 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_PASS_FOUR, is_persp);
dof_shader_pass5 = GPU_shader_get_builtin_fx_shader(GPU_SHADER_FX_DEPTH_OF_FIELD_PASS_FIVE, is_persp);
/* error occured, restore framebuffers and return */
if (!(dof_shader_pass1 && dof_shader_pass2 && dof_shader_pass3 && dof_shader_pass4 && dof_shader_pass5)) {
GPU_framebuffer_texture_unbind(fx->gbuffer, NULL);
GPU_framebuffer_restore();
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
GPU_shader_unbind();
glBindBuffer(GL_ARRAY_BUFFER, 0);
return false;
}
/* pass first, first level of blur in low res buffer */
{
int invrendertargetdim_uniform, color_uniform, depth_uniform, dof_uniform;
int viewvecs_uniform;
float invrendertargetdim[2] = {1.0f / fx->gbuffer_dim[0], 1.0f / fx->gbuffer_dim[1]};
dof_uniform = GPU_shader_get_uniform(dof_shader_pass1, "dof_params");
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass1, "invrendertargetdim");
color_uniform = GPU_shader_get_uniform(dof_shader_pass1, "colorbuffer");
depth_uniform = GPU_shader_get_uniform(dof_shader_pass1, "depthbuffer");
viewvecs_uniform = GPU_shader_get_uniform(dof_shader_pass1, "viewvecs");
GPU_shader_bind(dof_shader_pass1);
GPU_shader_uniform_vector(dof_shader_pass1, dof_uniform, 4, 1, dof_params);
GPU_shader_uniform_vector(dof_shader_pass1, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_shader_uniform_vector(dof_shader_pass1, viewvecs_uniform, 4, 3, viewvecs[0]);
GPU_texture_bind(src, numslots++);
GPU_shader_uniform_texture(dof_shader_pass1, color_uniform, src);
GPU_texture_bind(fx->depth_buffer, numslots++);
GPU_texture_filter_mode(fx->depth_buffer, false, true);
GPU_shader_uniform_texture(dof_shader_pass1, depth_uniform, fx->depth_buffer);
/* target is the downsampled coc buffer */
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_near_coc_buffer, 0, NULL);
/* binding takes care of setting the viewport to the downsampled size */
GPU_texture_bind_as_framebuffer(fx->dof_near_coc_buffer);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_unbind(src);
GPU_texture_filter_mode(fx->depth_buffer, true, false);
GPU_texture_unbind(fx->depth_buffer);
GPU_framebuffer_texture_detach(fx->dof_near_coc_buffer);
numslots = 0;
}
/* second pass, gaussian blur the downsampled image */
{
int invrendertargetdim_uniform, color_uniform, depth_uniform, dof_uniform;
int viewvecs_uniform;
float invrendertargetdim[2] = {1.0f / GPU_texture_width(fx->dof_near_coc_blurred_buffer),
1.0f / GPU_texture_height(fx->dof_near_coc_blurred_buffer)};
float tmp = invrendertargetdim[0];
invrendertargetdim[0] = 0.0f;
dof_params[2] = GPU_texture_width(fx->dof_near_coc_blurred_buffer) / (scale_camera * fx_dof->sensor);
dof_uniform = GPU_shader_get_uniform(dof_shader_pass2, "dof_params");
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass2, "invrendertargetdim");
color_uniform = GPU_shader_get_uniform(dof_shader_pass2, "colorbuffer");
depth_uniform = GPU_shader_get_uniform(dof_shader_pass2, "depthbuffer");
viewvecs_uniform = GPU_shader_get_uniform(dof_shader_pass2, "viewvecs");
/* Blurring vertically */
GPU_shader_bind(dof_shader_pass2);
GPU_shader_uniform_vector(dof_shader_pass2, dof_uniform, 4, 1, dof_params);
GPU_shader_uniform_vector(dof_shader_pass2, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_shader_uniform_vector(dof_shader_pass2, viewvecs_uniform, 4, 3, viewvecs[0]);
GPU_texture_bind(fx->depth_buffer, numslots++);
GPU_texture_filter_mode(fx->depth_buffer, false, true);
GPU_shader_uniform_texture(dof_shader_pass2, depth_uniform, fx->depth_buffer);
GPU_texture_bind(fx->dof_near_coc_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass2, color_uniform, fx->dof_near_coc_buffer);
/* use final buffer as a temp here */
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_near_coc_final_buffer, 0, NULL);
/* Drawing quad */
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* *unbind/detach */
GPU_texture_unbind(fx->dof_near_coc_buffer);
GPU_framebuffer_texture_detach(fx->dof_near_coc_final_buffer);
/* Blurring horizontally */
invrendertargetdim[0] = tmp;
invrendertargetdim[1] = 0.0f;
GPU_shader_uniform_vector(dof_shader_pass2, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_texture_bind(fx->dof_near_coc_final_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass2, color_uniform, fx->dof_near_coc_final_buffer);
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_near_coc_blurred_buffer, 0, NULL);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* *unbind/detach */
GPU_texture_filter_mode(fx->depth_buffer, true, false);
GPU_texture_unbind(fx->depth_buffer);
GPU_texture_unbind(fx->dof_near_coc_final_buffer);
GPU_framebuffer_texture_detach(fx->dof_near_coc_blurred_buffer);
dof_params[2] = fx->gbuffer_dim[0] / (scale_camera * fx_dof->sensor);
numslots = 0;
}
/* third pass, calculate near coc */
{
int near_coc_downsampled, near_coc_blurred;
near_coc_downsampled = GPU_shader_get_uniform(dof_shader_pass3, "colorbuffer");
near_coc_blurred = GPU_shader_get_uniform(dof_shader_pass3, "blurredcolorbuffer");
GPU_shader_bind(dof_shader_pass3);
GPU_texture_bind(fx->dof_near_coc_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass3, near_coc_downsampled, fx->dof_near_coc_buffer);
GPU_texture_bind(fx->dof_near_coc_blurred_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass3, near_coc_blurred, fx->dof_near_coc_blurred_buffer);
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_near_coc_final_buffer, 0, NULL);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_unbind(fx->dof_near_coc_buffer);
GPU_texture_unbind(fx->dof_near_coc_blurred_buffer);
/* unbinding here restores the size to the original */
GPU_framebuffer_texture_detach(fx->dof_near_coc_final_buffer);
numslots = 0;
}
/* fourth pass blur final coc once to eliminate discontinuities */
{
int near_coc_downsampled;
int invrendertargetdim_uniform;
float invrendertargetdim[2] = {1.0f / GPU_texture_width(fx->dof_near_coc_blurred_buffer),
1.0f / GPU_texture_height(fx->dof_near_coc_blurred_buffer)};
near_coc_downsampled = GPU_shader_get_uniform(dof_shader_pass4, "colorbuffer");
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass4, "invrendertargetdim");
GPU_shader_bind(dof_shader_pass4);
GPU_texture_bind(fx->dof_near_coc_final_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass4, near_coc_downsampled, fx->dof_near_coc_final_buffer);
GPU_shader_uniform_vector(dof_shader_pass4, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_framebuffer_texture_attach(fx->gbuffer, fx->dof_near_coc_buffer, 0, NULL);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_unbind(fx->dof_near_coc_final_buffer);
/* unbinding here restores the size to the original */
GPU_framebuffer_texture_unbind(fx->gbuffer, fx->dof_near_coc_buffer);
GPU_framebuffer_texture_detach(fx->dof_near_coc_buffer);
numslots = 0;
}
/* final pass, merge blurred layers according to final calculated coc */
{
int medium_blurred_uniform, high_blurred_uniform, original_uniform, depth_uniform, dof_uniform;
int invrendertargetdim_uniform, viewvecs_uniform;
float invrendertargetdim[2] = {1.0f / fx->gbuffer_dim[0], 1.0f / fx->gbuffer_dim[1]};
medium_blurred_uniform = GPU_shader_get_uniform(dof_shader_pass5, "mblurredcolorbuffer");
high_blurred_uniform = GPU_shader_get_uniform(dof_shader_pass5, "blurredcolorbuffer");
dof_uniform = GPU_shader_get_uniform(dof_shader_pass5, "dof_params");
invrendertargetdim_uniform = GPU_shader_get_uniform(dof_shader_pass5, "invrendertargetdim");
original_uniform = GPU_shader_get_uniform(dof_shader_pass5, "colorbuffer");
depth_uniform = GPU_shader_get_uniform(dof_shader_pass5, "depthbuffer");
viewvecs_uniform = GPU_shader_get_uniform(dof_shader_pass5, "viewvecs");
GPU_shader_bind(dof_shader_pass5);
GPU_shader_uniform_vector(dof_shader_pass5, dof_uniform, 4, 1, dof_params);
GPU_shader_uniform_vector(dof_shader_pass5, invrendertargetdim_uniform, 2, 1, invrendertargetdim);
GPU_shader_uniform_vector(dof_shader_pass5, viewvecs_uniform, 4, 3, viewvecs[0]);
GPU_texture_bind(src, numslots++);
GPU_shader_uniform_texture(dof_shader_pass5, original_uniform, src);
GPU_texture_bind(fx->dof_near_coc_blurred_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass5, high_blurred_uniform, fx->dof_near_coc_blurred_buffer);
GPU_texture_bind(fx->dof_near_coc_buffer, numslots++);
GPU_shader_uniform_texture(dof_shader_pass5, medium_blurred_uniform, fx->dof_near_coc_buffer);
GPU_texture_bind(fx->depth_buffer, numslots++);
GPU_texture_filter_mode(fx->depth_buffer, false, true);
GPU_shader_uniform_texture(dof_shader_pass5, depth_uniform, fx->depth_buffer);
/* if this is the last pass, prepare for rendering on the frambuffer */
gpu_fx_bind_render_target(&passes_left, fx, ofs, target);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
/* disable bindings */
GPU_texture_unbind(fx->dof_near_coc_buffer);
GPU_texture_unbind(fx->dof_near_coc_blurred_buffer);
GPU_texture_unbind(src);
GPU_texture_filter_mode(fx->depth_buffer, true, false);
GPU_texture_unbind(fx->depth_buffer);
/* may not be attached, in that case this just returns */
if (target) {
GPU_framebuffer_texture_detach(target);
if (ofs) {
GPU_offscreen_bind(ofs, false);
}
else {
GPU_framebuffer_restore();
}
}
SWAP(GPUTexture *, target, src);
numslots = 0;
}
}
}
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);
GPU_shader_unbind();
return true;
}
/*
* bindShaders - bind buffer data and pass shader variables.
* code based on example in http://www.opengl-tutorial.org/intermediate-tutorials/billboards-particles/particles-instancing/
*/
void ParticleSystem::bindShaders()
{
/* Update the buffers that OpenGL uses for rendering */
glBindBuffer(GL_ARRAY_BUFFER, particles_position_buffer);
glBufferData(GL_ARRAY_BUFFER, max_particles * 4 * sizeof(GLfloat), NULL, GL_STREAM_DRAW); // Buffer orphaning, a common way to improve streaming perf. See above link for details.
glBufferSubData(GL_ARRAY_BUFFER, 0, active_particles * sizeof(GLfloat) * 4, position_size_data);
glBindBuffer(GL_ARRAY_BUFFER, particles_color_buffer);
glBufferData(GL_ARRAY_BUFFER, max_particles * 4 * sizeof(GLubyte), NULL, GL_STREAM_DRAW); // Buffer orphaning, a common way to improve streaming perf. See above link for details.
glBufferSubData(GL_ARRAY_BUFFER, 0, active_particles * sizeof(GLubyte) * 4, color_data);
glBindBuffer(GL_ARRAY_BUFFER, particles_age_buffer);
glBufferData(GL_ARRAY_BUFFER, max_particles * sizeof(GLfloat), NULL, GL_STREAM_DRAW); // Buffer orphaning, a common way to improve streaming perf. See above link for details.
glBufferSubData(GL_ARRAY_BUFFER, 0, active_particles * sizeof(GLfloat), age_data);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Use our shader
glUseProgram(programID);
// Bind our texture in Texture Unit 0
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
glUniform1i(texture_ID, 0);
glUniform3f(CameraRight_worldspace_ID, model_view[0][0], model_view[1][0], model_view[2][0]);
glUniform3f(CameraUp_worldspace_ID, model_view[0][1], model_view[1][1], model_view[2][1]);
glUniformMatrix4fv(ViewProjMatrixID, 1, GL_FALSE, &model_projection[0][0]);
/* billboard vertices */
glEnableVertexAttribArray(squareVerticesID);
glBindBuffer(GL_ARRAY_BUFFER, billboard_vertex_buffer);
glVertexAttribPointer(squareVerticesID, 3, GL_FLOAT, GL_FALSE, 0, (void *)0);
/* bind particle attributes */
/* positions of particles' centers */
glEnableVertexAttribArray(xyzsID);
glBindBuffer(GL_ARRAY_BUFFER, particles_position_buffer);
glVertexAttribPointer(xyzsID, 4, GL_FLOAT, GL_FALSE, 0, (void *)0);
/* particles' colors */
glEnableVertexAttribArray(colorID);
glBindBuffer(GL_ARRAY_BUFFER, particles_color_buffer);
glVertexAttribPointer(colorID, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, (void *)0);
/* particles' age */
glEnableVertexAttribArray(ageID);
glBindBuffer(GL_ARRAY_BUFFER, particles_age_buffer);
glVertexAttribPointer(ageID, 1, GL_FLOAT, GL_TRUE, 0, (void *)0);
glVertexAttribDivisorARB(squareVerticesID, 0); // particles vertices : always reuse the same 4 vertices -> 0
glVertexAttribDivisorARB(xyzsID, 1); // positions: one per quad (its center) -> 1
glVertexAttribDivisorARB(colorID, 1); // color: one per quad -> 1
glVertexAttribDivisorARB(ageID, 1); /* age: one per quad */
/* draw each instance */
glDrawArraysInstancedARB(GL_TRIANGLE_STRIP, 0, 4, active_particles);
glDisableVertexAttribArray(squareVerticesID);
glDisableVertexAttribArray(xyzsID);
glDisableVertexAttribArray(colorID);
glDisableVertexAttribArray(ageID);
}
JNIEXPORT void JNICALL Java_org_lwjgl_opengl_ARBDrawInstanced_nglDrawArraysInstancedARB(JNIEnv *env, jclass clazz, jint mode, jint first, jint count, jint primcount, jlong function_pointer) {
glDrawArraysInstancedARBPROC glDrawArraysInstancedARB = (glDrawArraysInstancedARBPROC)((intptr_t)function_pointer);
glDrawArraysInstancedARB(mode, first, count, primcount);
}
static GLboolean
test_instancing(GLuint divisor)
{
static const GLfloat verts[4][2] = {
{-1, -1}, {1, -1}, {1, 1}, {-1, 1}
};
GLuint vbo;
uintptr_t offset = 0;
if (use_vbo) {
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER,
sizeof(verts) + sizeof(Positions) + sizeof(Colors),
NULL,
GL_STATIC_DRAW);
glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(verts), verts);
glVertexPointer(2, GL_FLOAT, 0, (void*) offset);
offset += sizeof(verts);
glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(Positions), Positions);
glVertexAttribPointer(PosAttrib, 2, GL_FLOAT, GL_FALSE, 0, (void*) offset);
offset += sizeof(Positions);
glBufferSubData(GL_ARRAY_BUFFER, offset, sizeof(Colors), Colors);
glVertexAttribPointer(ColorAttrib, 4, GL_FLOAT, GL_FALSE, 0, (void*) offset);
offset += sizeof(Colors);
glBindBuffer(GL_ARRAY_BUFFER, 0);
} else {
glVertexPointer(2, GL_FLOAT, 0, verts);
glVertexAttribPointer(PosAttrib, 2, GL_FLOAT, GL_FALSE, 0, Positions);
glVertexAttribPointer(ColorAttrib, 4, GL_FLOAT, GL_FALSE, 0, Colors);
}
glEnableClientState(GL_VERTEX_ARRAY);
glEnableVertexAttribArray(PosAttrib);
glEnableVertexAttribArray(ColorAttrib);
glVertexAttribDivisorARB(PosAttrib, 1);
/* advance color once every 'n' instances */
glVertexAttribDivisorARB(ColorAttrib, divisor);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(Program);
glDrawArraysInstancedARB(GL_POLYGON, 0, 4, PRIMS);
glUseProgram(0);
if (use_vbo) {
glDeleteBuffers(1, &vbo);
}
{
GLint i;
GLint pos[4];
for (i = 0; i < PRIMS; i++) {
GLuint elem = i / divisor;
/* use glRasterPos to determine where to read a sample pixel */
glRasterPos2fv(Positions[i]);
glGetIntegerv(GL_CURRENT_RASTER_POSITION, pos);
if (!piglit_probe_pixel_rgba(pos[0], pos[1], Colors[elem])) {
fprintf(stderr, "%s: instance %d failed to draw correctly\n",
TestName, i);
fprintf(stderr, "%s: color instance divisor = %u\n",
TestName, divisor);
piglit_present_results();
return GL_FALSE;
}
}
}
glDisableClientState(GL_VERTEX_ARRAY);
glDisableVertexAttribArray(PosAttrib);
glDisableVertexAttribArray(ColorAttrib);
piglit_present_results();
return GL_TRUE;
}